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    • 专利摘要:
    LIGHT-EMITTING SURFACE UNIT AND DISPLAY DEVICE PROVIDED WITH THE SAME. The present invention relates to a light-emitting surface unit which is an LED module (30) for emitting light from an LED chip (6) of a part of the light-emitting element (1) through a light flow control section (22) of a light flow control piece (2), the light flow control section (22) being fixed by a plurality of columnar sections (21) above a surface of fixing a substrate (4) on which the fixing surface of the part of the light-emitting element (1) is fixed. This provides an adequate gap between the light-emitting element part (1) and the light flow control section (22) for the release of heat.
    公开号:BR112012011279A2
    申请号:R112012011279-1
    申请日:2010-11-09
    公开日:2020-09-15
    发明作者:Nobuo Ogata；Mitsuru Hineno；Shinji Suminoe
    申请人:Sharp Kabushiki Kaisha；
    IPC主号:
    专利说明:

    Invention Patent Descriptive Report for "UNIT OF - LIGHT-EMITTING SURFACE AND DISPLAY DEVICE PROVIDED WITH THE SAME." Technical Field The present invention relates to a unit of the light-emitting surface, including a module of the light-emitting element usable in a backlight module for a liquid crystal TV, lighting equipment etc. Background of the Technique ”10 Light-emitting surface devices have been developed: employing solid-state light-emitting elements such as LEDs: (Light Emitting Diodes) as a point of light sources.
    Recently, such light-emitting surface devices that use points from light sources are used as backlight in display devices, such as liquid crystal TVs and liquid crystal monitors and as lighting equipment, etc.
    In general, devices on the light-emitting surface that employ spot light sources are prone to exhibiting luminance irregularity, because the light sources are similar to dots. Therefore, it is necessary to use several devices in order to make luminance on the light-emitting surface. For example, the patent literature 1.6.2 —-—— == - === == - + writes devices for surface light sources designed in such a way - - —much flow control members are provided on the sides of the emitting surface light emitting elements (light source points), in order to control the angles of light beams emitted from the light emitting elements and gently expanding the light flow emitted in a wide range, so that the beams of light coming from the light-emitting elements are more likely to be mixed with each other and the luminance of emitted light beams becomes even more, therefore exceeding the luminance irregularity.
    In the surface light source device described in Patent Literature 1, as shown in Figures 14 (a) to 14 (c), an e-
    ] light sensor (light emitting element module) is designed in such a way - that a flat portion on a rear surface 102a of a light flow control member 102 is attached and attached to a fixing substrate 104 of a light-emitting element 101. Consequently, the light-emitting element 101 is completely covered with the light-flow control member 102. This raises a problem that the heat from the light-emitting element 101 is difficult to release. .
    In order to deal with this problem, in the surface light source device described in Patent Literature 2, as shown in the figure. 10 15 (a), a light-emitting device (module of the light-emitting element) is. designed in such a way that a flat portion on a rear surface 102a of a light flow control member 102 is attached to a fixing substrate 104 of a light-emitting element 101 through a plurality of columnar members 105. This structure allows to ensure a space for the release of heat around the light emitting element 101. List of Citations - [Patent literature]
    [Patent literature 1)
    Publication of the Japanese patent application, Tokukai, No. 2006- 324256 (published on November 30, 2006)
    [Patents Literature 2] UU aaa FA “Publication of Japanese patent application, Tokukai, No. 2009- o 117207 (published-on28demaiode2008)
    Summary of the Invention
    - Technical problem In the light emitting device described in Patent Literature 2,
    as shown in figure 15 (b), end parts 105a-of the members = * columnar MM 105 of the light flow control member 102 are attached to the fixing substrate 104 in such a way that the end parts 105a
    - penetrate through holes 104a in the fixing substrate 104 and are thermally adhered there.
    However, when the light flow control member 102 is attached to the fixing substrate 104 as above, the end parts - 105a of the columnar members 105 protrude from a rear surface 104b of the fixing substrate 104 to form portions protruding. These protruding portions on the rear surface 104b of the fixing substrate104 raise several problems.
    For example, in a case where the light-emitting device is mounted on a chassis that forms a housing for an electronic device to form a device on the light-emitting surface, the protruding portions on the rear surface 104b of the fixing substrate 104 included in the light-emitting device become difficult to maintain parallel between: the light-emitting device and the chassis, causing variations in the distance between individual light-emitting elements and a surface of the light-emitting surface of the light-emitting device, being more likely to cause luminance irregularity. In addition, the protruding portions decrease the degree of adhesion between the light-emitting device and the chassis, so that the thermal conduction from the light-emitting device to the chassis falls. Therefore, in a case in which the light-emitting element used in the light-emitting device is an LED, the LED suffers from reduced heat and therefore low luminance. The «low-heat-LED-release-property-alsoie = - = ———- advantage of a problem that the LED's life is shortened.
    0. - Possible solution for the lighting of the bright LED from the projecting portions reducing the degree of adhesion between the light emitting device and the chassis is to provide a greater amount of current for the LED. However, this solution increases the amount of heat coming from the LED, raising a problem that the heat release property is aggravated. Another possible solution for the drop in luminance of the LED is to separately provide an optical sheet for increasing luminance. However, this raises a problem that the cost of manufacturing the device increases.
    'As described above, the conventional technique suffers from problems - such as luminance irregularity, due to the drop in luminance resulting from the worsening of the LED's heat release property serving as a light-emitting element and increased manufacturing cost. of the device due to equipping the device with a solution for luminance irregularity.
    In view of the above, by fixing the columnar members 105 on the fixing substrate 104 by means of adhesive resin so that the columnar members 105 do not protrude from the rear surface of the fixing substrate 10, it is possible to solve the problems mentioned above resulting : from the protruding portions on the rear surface 104b of the fixing substrate 104. However, fixing the fixing substrate and the column members through the adhesive resin raises a problem that the optical absorption of resins in the adhering parts darkens a space around columnar members or a space in a direction in which columnar members are formed when viewed from the light-emitting element, so that a light-emitting surface of a unit of the light-emitting surface exhibits luminance irregularity. The present invention was made in view of the previous problems. And ——- previous ones. -A-object-of-the-present-invention-is-providing-a-unit-of-the-surface Is "light emitting without irregularity of luminance in the its emitting surface "deluze a display device supplied with the unit's surface = light emitting. Problem Solution In order to solve the above problems, a unit of the su- - - perficie-emitting-light-of-the-present invention is a surface unit the light emitter for emitting light from a light emitting element through a light flow control member, the light flow control member being supported by a plurality of support members each having a predetermined height above a fixing surface of a fixing substrate on whose fixing surface of the element
    light-emitting device is fixed, and at least one of the plurality of support members is adhered to the fixing substrate through adhesive resin made of a resin material, the color of which exhibits a lesser amount of optical absorption to a region of the visible light than black.
    E) With the arrangement, support members are provided with a predetermined height between the light flow control member and the fixing substrate, so that an appropriate opening corresponding to the height of the support members is fixed around the light-emitting element fixed on the fixing substrate.
    In this way, it is possible to release, through the opening, the heat resulting from the emission by the light emitting element, so that there is no possibility of a drop in luminance resulting from: worsened heat release from the light emitting element.
    In addition, since the light flow control member is supported by the support members having a predetermined height above the fixing surface (front surface) of the fixing substrate on which the fixing surface of the light-emitting element is fixed, the support members do not exceed the end of the surface (rear surface) of the fixing substrate that is opposite the fixing surface (front surface) of the fixing substrate on which the fixing surface of the light-emitting element is fixed.
    Therefore, the rear surface of the fixing substrate is kept flat aeee === FA “Therefore, in a case of a light-emitting device -. obtained by fixing the unit to the surface of the emission of uzaumehassi that constitutes a housing for an electronic device, for example, the rear surface of the fixing substrate that constitutes the unit of the light-emitting surface can be adhered to the chassis, so that the distance between each light-emitting element of the unit.of-emitting-surface = - —-— B light and a light-emitting surface of the surface light source device can be kept constant.
    Consequently, there is no luminance irregularity resulting from variations in distance.
    In addition, since the fixing substrate that constitutes the light-emitting surface unit is closely linked to the chassis, the
    'heat from the light-emitting element can be released through the chassis. Therefore, the drop in luminance due to insufficient heat release from the light-emitting element can be even smoother.
    Consequently, it is not necessary to increase the energy source or to supply separately an optical sheet to increase the luminance in order to cover the drop in luminance of the light emitting element.
    The height of the support members is not particularly limited as long as the height ensures an opening between the light flow control member and the fixing substrate whose opening allows the release of '10 heat from the light-emitting element.
    R In addition, in the light-emitting surface unit with the above arrangement, since at least one of the plurality of support members is adhered to the fixing substrate through adhesive resin made of a resin material, the color of which exhibits a lesser amount of optical absorption to a visible region of black light, it is possible to reduce the optical absorption to a region of visible light by the resin in the portion where said at least 2 one of the plurality of support members is attached. Therefore, a space around the support members and the spaces in directions in which the support members are formed when viewed from the light-emitting element are not darkened, so that the luminance irregularity on the surface emitting light from the emitting surface unit ———— TA “light can be reduced.
    and One-example-preferred color that exhibits a lower NE amount of optical absorption in a region of visible light than black is white or transparent. One color eliminates the luminance irregularity on the light-emitting surface.
    - In order to solve the above problem, a surface unit = light-emitting unit of the present invention is a light-emitting surface unit for emitting light from a light-emitting element through a light-flow control member, the light flow control being supported by a plurality of support members each having a predetermined height above a
    There is a fixing substrate on whose fixing surface the light-emitting element is fixed, and only one of the plurality of support members being adhered and fixed to the fixing substrate through adhesive resin. With the arrangement, support members are provided with a predetermined height between the light flow control member and the fixing substrate, so that an appropriate opening corresponding to the height of the support members is secured around the emitting element of light fixed on the fixing substrate. In this way, it is possible to release, through the opening, the heat resulting from the emission by the light-emitting element, so that there is no possibility of a drop in luminance resulting from the worsened heat release of the light-emitting element.
    : In addition, since the light flow control member is supported by the support members having a predetermined height above the fixing surface (front surface) of the fixing substrate on whose fixing surface the light-emitting element is fixed , the support members do not protrude from the end of the surface (rear surface) of the fixing substrate which is opposite the fixing surface (front surface) of the fixing substrate on whose fixing surface the light-emitting element is fixed. Therefore, the rear surface of the fixing substrate is kept flat. Consequently, in a case of an emitting device = - ====== = FA It was obtained by fixing the unit of the light-emitting surface to a chassis that constitutes an electronic device housing, for example, on the surface rear of the fixing substrate that constitutes the light-emitting surface unit can be adhered to the chassis, so that the distance between each light-emitting element of the light-emitting surface unit and a light-emitting surface of the source device surface light can be kept constant. Consequently, there is no luminance irregularity resulting from variations in distance. In addition, since the fixing substrate that constitutes the light-emitting surface unit is closely linked to the chassis, the heat from the light-emitting element can be released through the
    'chassis. Consequently, the drop in luminance, due to insufficient heat release from the light-emitting element, can be even smoother.
    Consequently, it is not necessary to increase the energy source or to supply separately an optical sheet to increase the luminance, in order to cover the drop in luminance of the light emitting element.
    The height of the support members is not particularly limited as long as the height ensures an opening between the light flow control member and the fixing substrate, the opening of which allows heat to be released from the light-emitting element.
    '10 In addition, in the light-emitting surface unit with the above arrangement, since only one support member is fixed to the' fixing substrate using adhesive resin, it is possible to reduce the influence of the luminance irregularity. resulting from the adhesive resin compared to a case where all the support members are attached to the fixing substrate through the adhesive resin. When a display device includes a liquid crystal panel it is designed to use said light emitting surface unit as a backlight for radiating light to the liquid crystal panel from a rear surface of the even, it is possible to radiate light with the same luminance and without luminance irregularity to the liquid crystal panel. In this way, it is possible to increase-the-quality of-display-of -———— TA - liquid crystal panel, particularly the quality of the display when bindoumaimagemememimento Advantageous effects of the Invention One unit of the light-emitting surface of this invention is a unit of the light-emitting surface for emitting light from a light-emitting element through a light flow control member, the light flow control member being fixed by a plurality of fixing members each having a predetermined thickness — above a fixing surface of a fixing substrate on whose fixing surface the light-emitting element is fixed, so that the release property of heat from the light-emitting element is
    'doubt to be worsened.
    Thus, it is possible to provide a low-cost light-emitting surface unit that does not exhibit luminance irregularity on a light-emitting surface.
    Brief Description of Drawings Figure1i Figure 1 is a cross-sectional view showing schematically a module of the light emitting element according to a model of the present invention.
    Figure 2 '10 Figure 2 is a top view showing the module of the light emitting element shown in figure 1 when viewed from above. ] Figure 3 Figure 3 is a cross-sectional view showing schematically a liquid crystal module in which the light emitting element module shown in figure 1 is used as a backlight.
    Figure 4: (a) to (c) of figure 4 are views that show the result of the measurement of luminance irregularity in a liquid crystal module according to a comparative example of the present invention.
    FigureS5 (a) to (oc) of figure 5 are views that show the measurement result - = —— === = rrection of the Tuminance irregularity in the liquid crystal module shown in the figure NS Figure 6 (a) and ( b) of figure 6 are explanatory views showing substrate patterns on a fixing substrate included in the module of the light emitting element shown in figure LU Faua7o SS Figure 7 is a plan view showing the module of the element - emitting light shown in figure 2 supplied in a two-dimensional form.
    Figure 8 Figure 8 is a top view showing another example of the light emitting element module shown in figure 1 when viewed from. up.
    Figure 9 Figure 9 is a plan view showing the module of the light emitting element shown in Figure 8 provided in a two-dimensional form.
    Figure 10 Figure 10 is a cross-sectional view showing schematically a module of the light-emitting element according to another embodiment of the present invention. . 10 Figure 11 Figure 11 is a top view showing the light emitting element module shown in figure 10 when viewed from above.
    Figure 12 Figure 12 is a cross-sectional view showing schematically a module of the light emitting element according to yet another embodiment of the present invention.
    Figure 13 Figure 13 is a top view showing the module of the light emitting element shown in figure 12 when viewed from above.
    Figure1t4 (a - Figure 14 (a) is a plan view showing a device - and - = <===== - FA “conventional light sensor (light emitting element module). Biguta AM) A figure 14 (b) is a cross-sectional view showing the light emitting device shown in figure 14 (a). Figure 14 (c) and Figure 14 (c) is an exploded cross-sectional view showing the conventional light-emitting device shown in figure 14 (b). Figure 15 (a Figure 15 (a) is a view showing another conventional light emitting device (module of the light emitting element).
    Figure 15 (b) - Figure 15 (b) is an enlarged view showing an enlarged part of the light emitting device shown in figure 15 (a). Description of Modalities (Modality 1) The following explains an embodiment of the present invention. In mode 1, an explanation is made as for a case in which a unit of the light-emitting surface of the present invention is a module of the light-emitting element (hereinafter LED module) and a display device: The present invention is a liquid crystal display device using the LED module as a backlight. ] (General explanation of the LED module) Figure 1 is a cross-sectional view showing an LED module 30 according to the present modality. As shown in figure 1, LED module 30 includes a substrate (fixing substrate) 4, a plurality of parts of the light-emitting element 1 (light-emitting element) mounted on the substrate, and a plurality of light flow control parts (light flow control members) 2 mounted on the substrate. The parts of the light-emitting element are LED parts on which LED elements are mounted, and the light-flow control parts 2 are the resin lenses to control pRsRasaDATE: “angle of the light emitted from the parts of the emitting element of light 1. the
    0. Each of the pieces of the element in emissionordeluzTédesignada = | o such that a plurality of LED chips 6 are mounted on a substrate of part 5, such as ceramic. Each LED 6 is electrically connected to a bonding layer of the substrate of part 5 via a wire 10, etc., and also connected to substrate 4 by means of (i) an electrode from: rear surface Sa on the surface back of the substrate of part 5, the surface of which is opposite the surface where the LED chip 6 is mounted and (ii) a “connecting member 7 made of solder, etc. In addition, on the LED chip 6 of the light-emitting element part 1, the sealing resin 8 made of optically transparent resin, such as
    'as silicone is provided.
    A fluorescent material is added to the sealing resin 8, if necessary.
    In the present embodiment, an example of the LED chip 6 of the light-emitting element part 1 is a blue LED chip whose central wavelength is about 470 nm.
    A part of the light-emitting element 1 for R is obtained by adding a material to the sealing resin 8! fluorescent R which emits red light after irradiation with blue light.
    A part of the light-emitting element 1 for G is obtained by adding, to the sealing resin 8, a fluorescent material G which emits green light after irradiation with '10 light blue.
    A part of the light-emitting element 1 for B, which emits blue light, is obtained by adding no fluorescent material to the sealing resin 8. i Thus, the parts of the light-emitting element 1 for R, G and B, respectively. are obtained.
    How to obtain the parts of the light-emitting element 1 for R, Ge B are not limited to the above case, and they can be obtained from another combination of fluorescent materials.
    Alternatively, instead of using only the blue LED chip for LED chip 6 and differentiating colors using fluorescent materials, the light-emitting element parts 1 for R, G and B can be obtained by combining LED chips having their peak emission bands in wavelength bands of blue, red, green, etc., respectively.
    AnaataDaS rassssazs ass FS Raza = P ARAAe AAA RARO FasasspspeAnas AA rare “Alternatively, a combination of a blue LED chip and - a yellow fluorescent material-or-a combination of a blue LED chip and a red fluorescent material and a red fluorescent material and one green fluorescent material can be used to generate white emission.
    In addition, instead of providing a plurality of low-output LED chips, a | High output LED can be provided. - 'MA light flow control part 2 is made of transparent resin.
    Examples of the transparent resin include acrylic resin, polycarbonate resin, methacrylic resin, styrene resin, and epoxy resin.
    The light flow control part 2 is designed to serve as a lens, in particular a diffusing lens.
    The light flow control part 2 includes a light flow control section 22 serving as a - lens part, columnar sections (support members, columnar members) 21 to support the light flow control section 22 , and a concave section 23 to ensure a space in which the light-emitting element part 1 is inserted. The light-flow control part 2 is integrally molded through injection molding, etc. using a mold.
    Alternatively, the light flow control part 2 can be shaped so that the individual parts are molded separately and then are combined together to form the light flow control part 2. ' 10 The shapes of the light flow control section 22 and the concave section 23 are designated optically by simulation and so on. in advance in such a way that the light coming from the part of the light-emitting element 1 can be obtained as efficiently as possible and is diffused in a predetermined light flow distribution.
    An example of the shapes is a spherical one. In order that the light flow control part 2 controls the light from the part of the light emitting element 1 in a predetermined distribution, it is desirable to mount the control part of light flow 2 in the light-emitting element part 1 with high precision through the use of columnar sections 21. In particular, since the optical axis of the part of the light-emitting element is important 1 and the part of the emitting element must Jluz = 2 "" "= 22 wingsa = Aa = AasA“ 1 necessary to be | horizontal, the number of columnar sections 21 is three: - ourmais In this modality-an-explanation is made as a case | the SS where the number of columnar sections 21 is three.
    The light flow control part 2 is attached to the substrate 4, in such a way that each of the three columnar sections 21 is connected through the adhesive resin 3 to a fixing surface of the. substrate 4 on whose - fixing surface of the part of the light-emitting element 1 is fixed.
    As described above, it is preferable to fix the light flow control part 2 to the - substrate 4, where the part of the light emitting element 1 is mounted, because this fixation does not cause misalignment of the optical axis.
    In a case where the LED module 30 is placed on a metal plate (for example,
    (electronic device chassis), although the light flow control part 2 can be directly attached to the metal plate, the relative positional relationship between the metal plate and substrate 4 in a final product can change in prolonged use.
    Consequently, for a relative positional misalignment resulting from fixing the light-emitting element part 1 and the light-flow control part 2 to different members does not cause the optical axis to misalign, it is preferable that the part of the light-emitting element 1 and the light flow control part 2 are mounted on the common base (substrate 4). '10 Here, the light flow control section 22 is fixed via columnar sections 21 above a substrate fixing surface 4 on which the fixing surface of the light-emitting element part 1 is fixed.
    Therefore, an appropriate opening corresponding to the height of the columnar sections 21 is provided around the part of the light-emitting element 1 fixed on the substrate 4. Therefore, the heat resulting from the emission by the part of the light-emitting element 1 can be released through the aperture, so that the luminance does not drop due to the worsened heat release from the light-emitting element part 1. Furthermore, since the light flow control section 22 is fixed through the sections columnar 21 above the fixing surface (front surface) of: substrate> 4 on which the surface of the element-piece -— = - = - TA light emitter 1 is fixed, the opposite surface (rear surface) of the sub- . to4 have no derived experiences from columnar sections 21 and éêplama | Therefore, when substrate 4 is attached, for example, to a chassis, it is a housing for an electronic device, the rear surface of the substrate 4 can be strongly connected to the chassis, so that the part of the light-emitting element 1 can be maintained -parallel. -As a consequence, the luminance irregularity is reduced.
    In addition, since the substrate 4 is closely connected to the chassis, the heat from the light-emitting element part 1 can be released through the chassis.
    Consequently, the drop in luminance due to insufficient heat release from the light-emitting element part
    ] 1 can be smoother. - Consequently, it is not necessary to increase the energy source or to supply separately an optical sheet to increase the luminance, in order to cover the drop in luminance of the part of the light emitting element.
    The height of the columnar sections 21 is not particularly limited, since the height ensures an opening between the light flow control section 22 and the substrate 4 whose opening allows the release of heat from the part of the emitting element light 1 '10 In a case where LED module 30 is used as a product in a liquid crystal TV or lighting equipment, although substrate 4 and light flow control part 2 are attached to each other others, an increase in temperature resulting from the release of heat from the light-emitting element part 1 and other parts, while a display device operates and a drop in temperature when the display device forms substrate 4 and the control part of light flow 2 expands differently because the substrate 4 and the light flow control part 2 have different coefficients of thermal expansion.
    This can cause tension between the substrate 4 and the light flow control part 2, resulting in its breakage.
    In order to prevent such a rupture, it is desirable that the column sections 21 are designed to have a width that allows the sections—— "=" = = 222 ==== = -columns 21 to be deformed to disperse the tension.
    However, if the o - Jargura is too small, there is a possibility that the columnar sections Tm 21 cannot withstand the tension and break.
    Therefore, it is necessary to determine the ideal value in order to satisfy both the release of tension and the obtaining of force. (General explanation of columnar sections) “=. 'As for the size and shape of the columnar sections 21, the cross-sectional shape of the ideal section varies according to the shape and size of the light flow control part 2 and the position of the columnar sections 21. Examples of the shape of the section cross section of columnar sections 21 include a circle, an ellipse, a triangle, a square, an oblong, and a poly-
    gono. - In order to fix the light flow control part 2 to the substrate 4 and define the fixation surface, as described above, at least three columnar sections 21 are required. For example, figure 2 shows an example in which three columnar sections 21 are provided.
    The columnar section 21 is a member having a cylindrical shape, and its diameter is adjusted to 1.8 mm, for example. The light flow control part 2 has an outside diameter of about 19 millimeters, for example, and is covered with a reflective sheet 35 having a: 10 opening 35a with a diameter of approximately 23 mm. Reflective sheet 35 and substrate 4 have a fixing hole 9.
    It is preferable that, in a flat view of the substrate 4 with the part of the light-emitting element 1 as the center of an LED as shown in figure 2, the columnar sections 21 are fixedly positioned in such a way as to form an angle of 60º or less in with respect to a direction on the long side of the substrate 4 whose direction passes through the center of an LED (that is, 'with respect to a straight line X passing through the LED centers of the parts of the adjacent light-emitting elements 1).
    As described above, by positioning the columnar sections 21 in such a way as to form an angle of 60º or less with respect to the direction of the long side of the substrate, it is possible to supply threads on the substrate 4-detal - == -—-— FT “way that the wires are outside of a region where the columnar sections 21 are positioned — this allows you to decrease the width of the substrate 4 (length of the substrate 4 in a direction from the short side). In this case, the area of the substrate 4 can be reduced, so that the manufacturing costs can be reduced. Since the regions where the columnar sections 21 are connected are concentrated in one direction of the substrate-axis4, which mm is along the direction of the long side of the same, optical absorption by adhesive resin 3 cannot occur. solved using, like adhesive resin 3, resin whose color exhibits a lower amount of optical absorption in a visible region of black such as the light flow control part 2, etc. In order to reduce the optical absorption of adhesive resin 3 so small
    As far as possible, adhesive resin 3 is preferably a white or a transparent one.
    Means to eliminate the irregularity or drop in luminance resulting from columnar sections 21 will be detailed later. (Explanation of the surface characteristics of the substrate) Optical absorption may occur on the fixing surface of the substrate 4, where the part of the light-emitting element 1 is fixed, which can cause the luminance to drop.
    In order to avoid this, substrate 4 is covered with reflective sheet 35 as described above.
    This reduces the optical absorption on the fixing surface: 10, so that the drop in luminance can be moderated.
    In addition, for covering the fixing surface with reflective sheet 35, the fixing surface can be modified to have a property that reduces optical absorption.
    For example, a resin material having high reflectance can be applied to the fixing surface of the substrate 4, where only the light-emitting element 1 is fixed.
    This can also reduce the optical absorption on the fixing surface of substrate 4.: As described above, the LED module 30 is designed to dominate the irregularity and drop in luminance, and therefore can exhibit the same luminance on the light-emitting surface and effectively radiate light from the light source.
    When using the LED module 30 as a backlight in a liquid crystal display device, it is possible to eliminate = - "2 ===" == --quite in the image quality resulting from the luminance irregularity, the 0 in particular, the quality of the image used when an unrelated sound appears in a scrolled image while displaying a moving image. (General explanation of the liquid crystal display device) Referring to figure 3, the following explains a device '' liquid crystal display using LED module 30 as a backlight.
    Figure 3 is a cross-sectional view showing schematically a liquid crystal module 31 serving as a liquid crystal display device.
    Ú As shown in figure 3, the liquid crystal module 31 includes - a backlight chassis 34 made of resin or metal such as aluminum and the LED module 30 provided on the backlight chassis 34. The LED module 30 is attached to the backlight chassis 34 by means of a fixing piece 36 made of white resin and the fixing hole 9 that penetrates the substrate 4 and the reflective sheet 35. Above the LED module 30, are a support section (not shown) around the backlight chassis 34, and an optical sheet etc. are provided. 32 positioned by a support pin 37 to be spaced at a predetermined distance from the backlight chassis 34. The optical sheet etc. 32 includes, for example, a diffusion plate, a microlens sheet, and a microlens sheet which are positioned in that order from the side closest to the LED module 30. A liquid crystal panel 33 is positioned on the sheet optical etc. 32. Thus, the liquid crystal module 316 is provided.
    With reference to (a) to (c) of figure 4 and (a) to (c) of figure 5, the following explains the result of the measurement of luminance irregularity in the liquid crystal module 31. (a) a (c ) of figure 4 shows the result of the measurement of luminance irregularity in a case where the adhesive resin 3 used for columnar sections 21 that fixes the flow control piece.light 2.a9-subss —-- FA “ “Fracture 4 in LED module 30 is the resin that exhibits optical absorption to a happy region DD NS the (a) to (0) of figure 5 shows the result of the measurement of luminance irregularity in a case where the resin adhesive 3 used for columnar sections 21 that fix the light flow control part 2 to substrate 4 on the LED module) 30 is transparent-white resin; chemist WWW - displays optical absorption to a visible light region.
    That is, (a) to (c) of figure 4 shows the result of the measurement of optical irregularity in a case where the adhesive resin 3 on the liquid crystal module 31 shown in figure 3 is in general the black containing epoxy resin of carbon that presents optical absorption to a visible light region,
    'and (a) to (c) of figure 5 shows the result of the measurement of optical irregularity. in a case where the adhesive resin 3 on the liquid crystal module 31 shown in figure 3 is a white resin that has no optical absorption to a visible light region.
    The measurement of optical irregularity here indicates the luminance distribution measurement in the liquid crystal module 31. The luminance distribution measurement was made with CA2000 manufactured by KONICA MINOLTA.
    The liquid crystal module 31 used here was designed in such a way that the size of the liquid crystal panel 33 was 40 inches and the number of parts of the light emitting element 1 was: 10 of119 The measurement was made in such a way that the liquid crystal panel 33 exhibited white and all parts of the light emitting element 1 emitted light. i The measurement result consists of a two-dimensional luminance distribution map, a luminance cross section in an x - direction ((c) in figure 4, (c) in figure 5), and a luminance cross section in a y-direction ((b) in figure 4, (b) in figure 5). These luminance cross sections are cross sections of the center of the liquid crystal module 31 (portion where the light emitting element part 1 is positioned). The measurement result shows that in a case where adhesive resin3 is a resin that exhibits optical absorption in a visible light region, adhesive resin 3 absorbs returning light, etc. The. from == mW-plate = ass = —— 2 ==. - <ifission so that regions with low luminance that do not appear appear - respond to adhesive regions as shown in (a) to (c) of figure 4. This - Ns Tm causes the irregularity in the luminance cross section.
    Due to such an irregularity of luminance, there appears to be an unrelated shadow in a rolled image, so the liquid crystal module cannot be used to display a moving image. o TM In contrast to the same, the measurement result shows that in a case where adhesive resin 3 is a resin that does not have optical absorption in a visible light region, no luminance irregularity appears as shown in (a) to (c) of figure 5. Thus, the liquid crystal module 31 can preferably be used for the display
    'from a moving image. 'As described above, designating the LED module 30 in such a way that a space is provided between the light flow control section 22 and the substrate 4 where the light-emitting element part 1 is fixed and the surface of the substrate 4 opposite the fixing surface where the light-emitting element part 1 is fixed is flat, it is possible to prevent the heat release property of the part of the light-emitting element part 1 from being aggravated. Thus, it is possible to realize an economical light-emitting surface unit, which does not exhibit luminance irregularity on a '10 emitting surface. A possible cause for luminance irregularity in the LED module 30 included in the liquid crystal module 31 is patterns on the surface of the substrate 4, such as a wiring pattern. With reference to (a) and (b) of figure 6, the following explains patterns on the surface of the substrate 4.
    As shown in (a) of figure 6, on the substrate surface 4, electrode patterns 41 are provided to provide a power for the part of the light-emitting element 1 and a wiring pattern 42 connected with the patterns of electrodes 41. The electrode patterns 41 are connected with the electrode of the back surface 5a of the substrate of part 5 through a connection member 7. aaa [esa A white resistance is applied over the wiring pattern 42 and - - with the purpose of isolation and increasing the deflefamily | NS Electrode patterns 41 include a standard electrode 41a and an electrode pattern 41b. For example, a cathode of the substrate of part 5 is connected with the standard electrode 41a and an anode of the substrate of part 5 is connected with the standard electrode 41bh so that both ends of the substrate of part 5 are connected to a circuit of conduction of the LED (not shown), so that the light emitting element part 1 emits light When attaching the light flow control part 2 to the substrate 4 in the LED module 30, there is a case where the recognition patterns 43 are
    : provided on the surface of the substrate 4, in order to be positioned in portions where the columnar sections 21 are fixed as shown in (a) of figure 6. In most cases, the recognition patterns 43 are black, in order to facilitate recognition, but black can cause
    optical loss.
    When columnar sections 21 are attached to substrate 4 through a white resin such as adhesive resin 3, adhesive resin 3 covers recognition patterns 43, so that loss of optics is not caused, alternatively, instead of recognition patterns 43 having a black color, the recognition patterns 43 can contain a
    '10 “fluorescent material excited by light whose wavelength is shorter than visible light or may contain light diffusing material.
    In this case, when fixing columnar sections 21 to substrate 4, irradiation of light with a short predetermined wavelength or irradiation of light at a predetermined angle allows recognition of the recognition patterns.
    Since the recognition patterns in this case do not cause optical loss, adhesive resin 3 can be transparent resin, instead of white resin.
    In the case where adhesive resin 3 is a white resin, the application of adhesive resin 3 on the recognition patterns 43 whose color is other than white changes the color of the recognition patterns 43. Consequently, the operating errors such as failure. to-apply-to-resiga === adhesive 3 can be easily noticed. o Co ... As thick-thick adhesive adhesive 3 entrances | NS columnar 21 and substrate 4 is smaller, the accuracy in the height position of the light flow control part 2 increases.
    However, as the thickness of the adhesive resin 3 is smaller, the effect of the adhesive resin 3 masking the recognition patterns 43 is weaker, demodo-compliant Bread - patterns of recognition 43 is more likely to be seen through the adhesive resin 3 As such, the recognition patterns of 44 having a ring shape, as shown in (b) of figure 6 can be employed.
    Recognition standards 44 make it possible to increase the masking effect
    adhesive resin 3.
    - Therefore, the adhesive resin between the molded member and the fixing substrate can be thinner, so that the accuracy in the height position of the light flow control member can be increased.
    Therefore, the light flow control member can be more parallel, so that the distance between the light-emitting surface of the light-emitting surface unit and the light flow control member can be constant. As a result, the luminance on the light-emitting surface can be the same.
    : 10 Appropriately define the shape of the columnar sections 21 that. constitute the light flow control part 2, appropriately to define the height (length) between the fixing surface of the substrate 4, where the columnar sections 21 are fixed and a counter surface of the substrate 4 whose surface faces the light flow control 22, appropriately defining the size (diameter) of columnar sections 21, and appropriately defining the position of columnar sections 21 is very important to smooth the drop in luminance and luminance uniformity. That is, it is necessary to smooth the drop in luminance resulting from the appropriate size (height (length), width (diameter)) of columnar sections 21 and to smooth out the luminance irregularity resulting from the positional relationship between columnar sections 21. aaa = = —— Smoothing the resulting luminance drop from the size of the columnar sections) NS Normally, a liquid crystal backlight is provided behind a liquid crystal panel. Therefore, if a liquid crystal display device as a whole is intended to be thinner, it is necessary to make the backlight thinner than-cristallíquido- AqUI, make the LED module 30 included in the backlight more Thin liquid crystal is essential to make the liquid crystal backlight thinner. To make the LED module 30 thinner, the height of the columnar sections 21 of the light flow control part 2 is an important factor. In addition, taking into account the resistance of the LED module 30,
    Only the height of the columnar sections 21, but also the appropriate designation. cross section of columnar sections 21 is an important factor. For example, it is desirable to designate the height (length) of the columnar sections 21 in such a way that the light flow control part 2 is positioned as close as possible to the part of the light-emitting element 1, provided that the light flow control 2 do not touch the part of the light emitting element 1 and the optical simulation displays a predetermined dispersion. If the columnar sections 21 and the adhesive resin 3 of the light flow control section 7 10 surround the light-emitting element part 1 and consequently block the air flow around the light-emitting element part 1 and prevent the air cooling of the part of the light-emitting element 1, there may be a demerit of drop in the reliability of the part of the light-emitting element 1, such as luminance drop of the LED chip
    6. For this reason, it is desirable that the volumes of columnar sections 21 and adhesive resin 3 are as small as possible. In consideration of the above and in consideration of the ease in producing columnar sections 21 as support sections, in the present embodiment, columnar sections 21 are columns whose diameter is 1.8 mm and whose height (length) is 1.1 mm. As the length of the columnar sections 21 is longer, the light reflected inside the background light is more likely to “MM Ú FA" to introduce the section: light flow control 22 (lens) and thus 0 reduce intensity- dauz-resuttando in fall in luminance In order to - deal with this problem, it is necessary to properly define the columnar sections length 21, It should be noted that the length and width of the columnar sections 21 mentioned above are just examples and the columnar sections 2 1 are not limited to these examples: '"By defining the width and length of columnar sections 21 as above, it is possible to prevent the occurrence of airflow blocking for the part of the light-emitting element 1, so that the cooling air of the LED chip 6 is not prevented. Consequently, the luminance of the LED chip 6 does not drop, so it is possible to smooth the drop in luminance of the LED module 30. - (Smoothing of the irregularity in the luminosity resulting from the positional relationship between the columnar sections) The following explains the prevention of drop in luminance resulting from the positional relationship between columnar sections 21. Since columnar sections 21 are different in structure from other components in the light flow control part 2, an optical difference occurs between columnar sections 21 and other components.
    The optical influence, in this case, is such that the light flow is greater and: 10 stronger as the light flow is closer to the part of the light emitting element 1, which is a light source.
    For this reason, it is desirable that the columnar sections 21 are positioned away from the part of the light-emitting element 1 which is the center of the LED module 30. On the other hand, if the distance between the columnar sections 21 is greater, a difference in expansion in the time of temperature change between columnar sections 21 is greater, causing greater tension and drop in reliability.
    In view of the above, it is desirable that the columnar sections 21 are positioned, as far as possible, from the part of the light-emitting element 1, since the columnar sections 21 remain within a range where reliability is not fall and there is no optical influence.
    However, even if the columnar sections-21-are in position À = ———. === "= * - * within a range where there is as little influence as possible - optical optics are difficult to place columnar sections 21 in a range in o that there is no optical influence on the columnar sections 21, because the balance with force and a request to reduce the dimensioning of the light flow control part 2 must be considered.
    The irregularity in luminosity resulting from the "optical influence" of the light-emitting element part 1 and the light-flow control part 2 can be dealt with properly by defining the light-flow control part2. In a case where the light module LED 30 is used as a lighting or backlight device, in order to reduce optical irregularity, an optical member such as a diffusion plate making the same flow
    : luminous is provided above the LED module 30 on which a plurality, parts of the light-emitting element 1 and a plurality of parts of light-flow control 2 are provided. In this case, light enters from the other part the light-emitting element 1 through the flow control part deluz2eis reflected by the optical member to introduce the part of the light-emitting element 1 and the light flow control part 2 as a light flux component. Such a component of light flux is not a negligible factor. Likewise, in a case where the columnar sections 21 '10 of the light flow control part 2 and the adhesive resin 3 are made of different members in optical properties of the adjacent members, less portions appear with less luminance. in specific directions from the columnar sections 21 and the adhesive resin 3, which fixes the columnar sections 21, so that optically irregular portions do not appear. In order to deal with this problem, in the present invention, the adhesive resin 3 through which the columnar sections 21 of the light flow control section 22 are attached to the substrate 4 is a white or transparent resin, which has the same optical absorption such as the light flow control part 2, etc., and exhibits a small amount of optical absorption in a visible light region.
    Therefore, it is possible to eliminate portions with lower luminance in specific directions from the resin -adhesive- S-quefiicaa £ e WMM '== === = columnar ions 21, so that optically irregular portions do not appear = UÚÚ - ———— homes. In this way, it is possible to eliminate the luminance irrigularity on the light-emitting surface of the LED 30.
    A suitable range of positions for columnar sections 21 has been explained above with reference to figure 2. In addition, there is a case where columnar sections 21 of adjacent 2 "'light flow control parts - make shadows, which are combined to cause instability in the luminance, (Influence (1) of columnar section shadow) For example, in figure 2, on line X that passes through the LED centers of adjacent light-emitting element parts 1, a
    'of the three columnar sections 21 of each light flow control part 2 is - positioned.
    Figure 7 is a view showing the LED module 3 in which the parts of the light emitting element 1 shown in figure 2 are provided in a two-dimensional form.
    In figure 7, the X and Y lines pass through the LED center of each part of the light-emitting element 1. The X and Y lines intersect at a right angle.
    Consequently, in the LED module 30 shown in figure 7, '10 each light flow control piece 2 includes three columnar sections 21, and one of the three columnar sections 21 is provided so that its i center is positioned on the lateral line X that joins the centers of the adjacent light-emitting element pieces 1, and remaining two of the three columnar sections 21 are provided so that their centers are not positioned on the vertical line Y that joins the centers of the pieces adjacent light-emitting elements 1. In this case, streaks of luminance irregularity appeared only in the lateral direction (x direction), and not in the vertical direction (y direction). This is because the columnar sections 21 block the light coming from the part of the light-emitting element 1 by making shadows, which are aligned on the line that joins the components of the light-emitting element 1 adjacent in a laterate direction. AsAma = IA = —AççAE “Fados, but they are not aligned in the line that joins the components of the light-emitting element adjacent to it in a vertical direction. | Tm Figure 7 shows an example in which columnar sections 21 are provided in such a way as to be positioned on the lateral line X and not on the vertical line Y. However, in a case where the columnary sections 21 are provided in such a how-to-be-positioned not - | 7 NS on the lateral line X, but on the vertical line Y, streaks of luminance irregularity appear only in the vertical direction (y direction), and not in the lateral direction (x direction). (Influence (2) of shadow of the columnar section) Figure 8 is a view showing an example in which the sections
    'columnar 21 shown in figure 2, which are positioned on line X. are rearranged so as not to be positioned on line X.
    In figure 8, the three columnar sections 21 of each light flow control part 2 are formed so that none of the three columnar sections 21 are positioned on line X that passes through the centers of the part LEDs. of the adjacent light-emitting element 1.
    Figure 9 is a view showing the LED module 30 in which the parts of the light-emitting element 1 shown in Figure 8 are provided in a two-dimensional form.
    : 10 In figure 9, as well as in figure 7, the lines X and Y pass through the center of the LED of each part of the light-emitting element 1. The lines X and Y intersect at a right angle. In the LED module 30 shown in figure 9, the column sections 21 of each light flow control section 2 are provided so that the centers of all columnar sections 21 of each light flow control section 2 are not. be positioned on the vertical and lateral lines (lines X and Y) that join the centers of the adjacent light-emitting element parts 1. In this case, streaks of luminance irregularity do not appear in both vertical and lateral directions. This is because the column sections21 block the light coming from the part of the light-emitting element 1 of shadows, but the shadows do not align with the vertical line V-euatinhalater - aEssa = 22 nes = ral X uniting the parts of the emitting element adjacent light 1. the eninte ——— “ED30Dodeodule shown in Fig. 9, all parts of TO light flow control 2 exhibit the same positional relationship between columnar sections21. However, the present invention is not limited to this, and the positional relationship between columnar sections 21 in a light flow control piece 2 can vary depending on whether the Tuz 2 flow control piece is in an odd column or a even column, or the positional relationship between columnar sections 21 in a deluz2 flow control piece can be completely random. In the latter case, the shadows of the columnar sections 21 overlap each other in smaller areas, so that streaks of luminance irregularity are more moderate.
    : In a case of a light-emitting surface unit, co-. As shown in figures 7 and 9, it is preferable to provide the parts of the light emitting element 1 in a square way on the LED module 30 in order to make the same luminance in the plane. When the part of the light-emitting element 1 is given a square shape, the mutual influences between the adjacent parts of the light-emitting element 1 exist not only in the vertical and lateral directions, but also in oblique directions (diagonal directions). It is therefore necessary to provide columnar sections 21 in such a way that columnar sections 21 are not positioned in lines that pass "10 through the adjacent light-emitting element parts 1 in diagonal directions, as well as columnar sections 21 are not positioned in the lines X and Y. This arrangement allows to eliminate mutual influences between the parts of the light-emitting element 1 that are adjacent in the diagonal directions, as well as the mutual influences between the parts of the light-emitting element 1 that are adjacent in the vertical and lateral, so that it is possible to considerably reduce the luminance irregularity resulting from the mutual influences between the parts of the adjacent light-emitting element 1.
    In the present modality 1, an explanation was made as to a case in which all columnar sections 21 are adhered and fixed to substrate 2 through adhesive resin 3. However, all columnar sections 21 are not necessarily adhered and fixed to the -substrato-2-through = == AssezaçA — oo— = - adhesive strip 3, and it is only necessary that the e-light2 flow control piece be attached to the substrate-4, Portonseguinte, the number of colu- the noses 21 which are adhered and fixed are not particularly limited.
    In modality 2 below, the explanations will be made to an example in which only one of the three columnar sections 21 of each piece of light flow control 2 is: adhered and fixed to the substrate4 through the resin | 'Ú “adhesive 3 and an example in which two of the three columnar sections 21 of each light flow control piece 2 are adhered and fixed to the substrate 4 through adhesive resin 3. (Mode 2) The following explains another embodiment of the present invention
    'with reference to figures 10 to 13, an LED module 30 according to. This modality is the same as the one according to modality 1 in terms of its basic structure, and, therefore, the components that have the same functions are given the same reference signs and detailed explanations of the same are omitted here.
    Figure 10 is a cross-sectional view showing an LED module 30 obtained by modifying the LED module 30 shown in Figure 1, in accordance with mode 1 to partially exclude adhesive resin 3. Figure 11 is a plan view showing the LED module 30 shown in figure 10 seen from above.
    Here, as shown in figure 11, an example is shown in which 'three columnar sections 21 of each light flow control piece 2, two columnar sections 21 on the left side of the design are not adhered and attached to the substrate 4 through the resin adhesive 3. That is, an example is shown in which only one of the three columnar sections 21 is adhered and fixed to the substrate 4 through adhesive resin 3. The columnar section 21 to be adhered and fixed can be any of three columnar sections 21, As explained in modality 1, even when the adhesive resin 3 is made of white resin or transparent resin that has a small amount of optical absorption in a visible light region as the light flow control piece etc. 2, in order to reduce the regularity of ”n = —— .. —Darkness resulting from adhesive resin 3, it is difficult to completely eliminate the influence of adhesive resin 3 because. Adhesive Tesina 3 still exists in a region where columnar sections 21 are adhered and fixed. In order to deal with this, in the example above, only one of the three columnar sections 21 to support the light flow control part 2 is adhered and fixed to the substrate 4 through adhesive resin-3; | 'Ú “creep of adhesive resin 3 can be reduced compared to the case where all columnar sections 21 are adhered and fixed to substrate 4 through adhesive resin 3. In this way, it is possible to further reduce the resulting luminance irregularity from of adhesive resin 3. In addition, reducing the number of portions in which the resin
    Adhesive 3 is used to reduce the influence of adhesive resin 3 as. described above.
    Therefore, adhesive resin 3 is not required to be made of a white resin or transparent resin that has a small amount of optical absorption in a visible light region as above. This is the material of adhesive resin 3 that can be selected more. freely.
    In view of the above, in the event that only one of the three columnar sections 21 to support the light flow control part 2 is adhered and fixed to the substrate 4 through the adhesive resin 3, it is possible to further reduce the resulting luminance irregularity from adhesive resin 3 compared to the case where all three column sections 21 are adhered and attached to substrate 4. Likewise, the above effect can be produced without specifically limiting the material of the adhesive resin 3. However, in order to further reduce lumen irregularity, adhesive resin 3 material is preferably white resin or transparent resin that has a small amount of optical absorption in a visible light region .
    As with modality 1, in this modality, it is preferable that the LED module 30 shown in figure 11 is designed such that none of the three columnar sections 21 of each light flow control piece 2 is positioned to be natinha X that passes = sparse = —strávê the centers of the LEDs of adjacent pieces emitting light 1, afm - - to eliminate the influence-of irregularity of luminance in the plane r resulting NS from the shadows of columnar sections 21, as in the case of LED module 30 shown in figure 8, according to modality 1. Although the above example has several merits as above, resulting from the configuration that the light-control-part-light 2 | is Attached to substrate 4 through only one of the three columnar sections 21, the above example also has demerits such as low adhesive strength and unstable attachment.
    In order to deal with this, a possible example is such that the light flow control part 2 is fixed to the substrate 4 through two of the three
    Ú columnar sections 21.
    . Figure 12 is a cross-sectional view showing another example of an LED module 30 obtained by modifying LED module 30 shown in figure 1, in accordance with mode 1 to partially exclude adhesive resin 3. Figure 13 is a plan view showing LED module 30 shown in figure 12 seen from above. Here, as shown in figure 13, an example is shown in which only one of the three columnar sections 21 of each light flow control piece 2 is not adhered and fixed to the substrate 4 through the adhesive resin: 10 va3 Istoé, is An example is shown in which two of the three columnar sections 21 are adhered and fixed to substrate 4 through adhesive resin 3. The two columnar sections 21 to be adhered and fixed can be any combination of the three columnar sections 21. In the example above, two of the three columnar sections 21 for a- —the light flow control part 2 are adhered and fixed to substrate 4 through adhesive resin 3. This configuration allows for an increase in adhesive strength and ensure a more stable fixation compared to example in which only one of the three columnar sections 21 is adhered and fixed as described above. In the event that only one of the three columnar sections 21 to support the light flow control part 2 is adhered-and-fixed-quataier ratlmasszanAt the three columnar sections 21 can be selected and adhered and fixed. - However, in the case-in-which-two of the three sections: columnar 21 are adhered to and fixed, where positioning the two columnar sections 21 to be adhered to is important. In the present embodiment, as shown in figure 13, an example is shown in which two columnar sections 21-positioned substance “parallel to each other in a short-side direction not in a long-side direction of the strip-like substrate (similar to the strip) 4 are - adhered and fixed as shown in figure 13. This example is intended to prevent the decrease in the adhesive strength of the light flow control part 2, which is caused by the deformation / distortion of the shaped substrate strip 4
    'resulting from the thermal expansion of the substrate 4, or to prevent the rupture of the light flow control piece 2, which is caused by the propagation of the deformation / distortion of the substrate 4 to the light flow control piece 2 through of columnar sections 21. As with mode 1, also in the present mode, it is necessary to consider the luminance irregularity resulting from shadows of columnar sections 21, that is, in the case where one of the three columnar sections 21 of each light flow control part 2 is positioned on the line X that passes through the LEDs of parts' 10 of light emitting elements | adjacent, as shown in figures 11 and 13, there is a possibility that streaks of luminance irregularity 'appear in a direction parallel to the side of line X. This is because, as explained in mode 1, columnar sections 21 on line X blocks the light coming from the part of the light-emitting element 1 to make shadows, which are aligned on the line that joins the parts of the light-emitting element 1 adjacent in the lateral direction and are emphasized. Ns In order to avoid this phenomenon, the columnar sections 21 of each, part of the light emitting element 1 are provided so as not to be positioned in line X, as shown in figure 8, according to the modality
    1. Likewise, in the present mode, positioning as.se -—————-- === ===== - columnar s 21, as shown in figure 8, and reducing the number of - - portions in which the light control part 2 is adhered to the substrate 4 through the adhesive resin 3, it is possible to further soften the luminance regularity resulting from the columnar sections 21 and the adhesive resin 3, in comparison with mode 1, so that it is possible to carry out a unit of the light-emitting surface with luminance adds —————- 'compared to modality 1 In the above embodiments, the explanations were made as to the examples where the support members to support the light flow control piece 2 are columnar sections 21 having a columnar shape, but the shape of the support members is not particularly limited. O
    The support member may have a shape obtained by partially removing an integrally formed R ring with a lens that serves as the light flow control piece 2. Alternatively, the support member may be a projection projected on the substrate 4 to support the light flow control part2.
    It is preferable to arrange the light-emitting surface unit of the present invention such that each of the plurality of support members is a columnar member.
    With the arrangement, since each of the plurality of 7 10 “support members is a columnar member, a tension caused by the thermal expansion of the light flow control member resulting from the heat released when the light emitting element emits light or a tension caused by thermal contraction of the light flow control member resulting from the cooling of the light emitting element when it stops emitting light can be dispersed by deformation of the columnar members. That is, by controlling the width of the columnar members, it is possible to easily control the degree of force dispersion caused by the deformation of the columnar members. It is preferable to arrange the light-emitting surface unit of the present invention in such a way that each of the plurality of support members is integrally formed with the flow control member. of light- - <===== - = - sa = aa AAA, Tom is available, since each of the support members is fully formed -with the light flow control member, 68 The support members are made of a light transmitting material, which is the same as for the light flow control member. In addition, since the end of the support member is adhered and fixed to the fixing substrate through the adhesive resin 1 which has a small amount of optical absorption —ÕÂ ———— 'in a visible light region, spaces around of the support members and the spaces around the portions where the support members are fixed to the fixing substrate through the adhesive resin are not darkened, so that it is possible to further reduce the luminance irregularity on the light-emitting surface of the light-emitting surface unit.
    . It is preferable to arrange the light-emitting surface unit of the present invention in such a way that each of the plurality of support members is fixedly positioned in such a way as to form an angle of 60 ° or less with respect to a long side direction of the substrate. fixation whose direction passes through a center of the fixing substrate in a plan view of the fixing substrate.
    With the arrangement, the width in a short lateral direction of the fixing substrate to which the light flow control member is fixed '10 can be shortened, so that the area of the fixing substrate as a whole can be reduced. Since the substrate area is reduced, the cost for the substrate can be reduced.
    The light-emitting surface unit of the present invention is arranged in such a way that only one of the plurality of support members is adhered and attached to the fixing substrate through the adhesive resin.
    With the arrangement, since only one of the plurality of support members is fixed to the fixing substrate through the adhesive resin, it is possible to reduce the influence of the luminance irregularity resulting from the adhesive resin compared to a case where all support members are attached to the fixing substrate using adhesive resin. In addition, when the thermal distortion 1 / deformation of the substrate of -—-——— == - == ————- ixation is propagated to the support member through the adhesive resin, one 0 times only one of the plurality of members is unsuitable for the sub-treatment of fixation, the thermal distortion / deformation is not propagated to others of the plurality of support members, any of the support members is not broken.
    The surface of the light-emitting unit of the present invention is —Õ ——— arranged in such a way that the plurality of support members is three or more support members, only two of which are adhered to and attached to the - fixing substrate through of the adhesive resin.
    With the arrangement, since only three of the three or more support members are attached to the fixing substrate through the resin
    ] adhesive, it is possible to reduce the influence of luminance irregularity - resulting from the adhesive resin, compared to the case where all the support members are fixed to the fixing substrate through the adhesive resin.
    In addition, since two support members are attached to the fixing substrate through the adhesive resin, it is possible to increase the adhesive strength between the support members and the fixing substrate compared to a case where only one support member is fixed to the substrate by fixing the adhesive resin. Therefore, the: 10 “light flow control member supported by these support members can be fixed to the additional fixing substrate stably. | It is preferable to arrange the surface of the light-emitting unit of the present invention in such a way that the fixing substrate has a strip shape, and only two support members that are adhered and fixed to the fixing substrate through the adhesive resin are aligned in a short side direction of the fixing substrate.
    o: In general, in a case where a fixing substrate has a strip shape, the influence of deformation / distortion resulting from thermal expansion is greater in a long side direction of the fixing substrate than in the short side direction. Therefore, the fixing substrate that has a strip shape is susceptible to the influence of deformation / distortion --—— === - —Therefore of thermal expansion in the long side direction, while not - susceptible to the influence of deformation / distortion resulting from the expansion - | the thermal towards the short side.
    Likewise, by fixing the two support members aligned in a short side direction of the fixing substrate through the adhesive resin as above, the support members fixed by means of dafe -———————— sign adhesive are less likely to be influenced by the deformation / distortion resulting from thermal expansion. Therefore, it is possible to prevent a drop in the adhesive strength of the light flow control member or to prevent the rupture of the light flow control member resulting from the propagation of deformation / distortion from the fixing substrate to the control member.
    ] of the light flow through the portions where the fixation members are attached and fixed to the substrate.
    Here, there is a possibility of optical absorption on the fixing surface of the fixing substrate on whose fixing surface the light-emitting element is fixed, resulting in a drop in luminance.
    In order to deal with this, it is preferable to arrange the unit of the light-emitting surface of the present invention in such a way that the fixing surface of the fixing substrate on which fixing surface the light-emitting element is fixed has a property that exhibits a small amount of optical absorption in a region of visible light. In addition, it is preferable to arrange the light emitting surface unit i such that a reflective sheet is provided on the fixing surface of the fixing substrate on which fixing surface the light emitting element is fixed. Furthermore, it is preferable to arrange the surface of the light-emitting unit of the present invention in such a way that a resin material with high reflectance is applied on the fixing surface of the fixing substrate on whose fixing surface the element light emitter is fixed. With the above provisions, it is possible to reduce the optical absorption in the fixing surface of the fixing substrate on whose fixing surface the light-emitting element is fixed. In this way, it is possible to smooth down = = = = —— FA “drop in luminance on the light-emitting surface. co. ——- - It is preferable to have the light-emitting moisture surface of the == the present invention in such a way that the recognition patterns indicative of positions where the plurality of support members are fixed are provided on the fixing surface of the fixing substrate on the fixing surface of which the light-emitting element is fixed. : "With the arrangement, since the recognition patterns indicative of positions where the plurality of support members are fixed are provided on the fixing surface of the fixing substrate on whose fixing surface the light-emitting element is fixed, it is possible to precisely fix the support members to target positions.
    'Therefore, it is possible to position the control member of: light flow properly in relation to the light emitting element, so that it is possible to eliminate the misalignment of the optical axis between the light emitting element and the light limb. control of light flow.
    Consequently, the drop in luminance resulting from misalignment of the optical axis between the light-emitting element and the light-flow control member can be eliminated, so that the luminance irregularity on the light-emitting surface of the emitting surface unit of light can be reduced.
    "10 In a case where the recognition patterns have a color that absorbs light into a visible light region, there is a possibility that the luminance drops due to the recognition patterns.
    In order to deal with this, it is preferable to arrange the light emitting surface unit of the present invention in such a way that each of the recognition patterns has a size that allows the recognition patterns to be covered by the resin. adhesive when the plurality of support members is fixed to the fixing substrate through the adhesive resin.
    With the arrangement, when the plurality of support members is affixed to the fixing substrate through the adhesive resin, the recognition patterns are covered by the adhesive resin exhibiting a small - -----— = - = == quantity c of optical absorption in a region of visible light, so that
    0 ... recognition standards are hidden So, bad luck can help | that the luminance drops due to recognition patterns.
    In order to obtain similar effects, the arrangements below are preferable.
    It is preferable to arrange the surface of the light-emitting unit of the present invention in such a way that the recognition patterns include a fluorescent material excited after irradiation with light whose wavelength is shorter than visible light.
    It is preferable to arrange the light-emitting surface unit of the present invention in such a way that the recognition standards include
    'a light diffusing material. . When designating the color of the recognition patterns to be different from the color of the adhesive resin, applying the adhesive resin with the different color to the recognition patterns changes the color of the recognition patterns. Consequently, operating errors, such as not applying the adhesive resin, can be easily noticed. By designating each of the recognition patterns to have a ring shape in a region corresponding to one end of the plurality of support members, it is possible to increase the masking effect of the adhesive resin, even if the amount of adhesive resin to be applied is not so large. ] B Therefore, the adhesive resin between the support members 7 and the fixing substrate can be thinner, so that the accuracy in the height position of the light flow control member can be increased. Therefore, the light flow control member can be more parallel, so that the distance between the light-emitting surface of the light-emitting surface unit and the light flow control member can be constant. As a result, the luminance on the light-emitting surface can be the same. The present invention is not limited to the description of the modalities above, but can be changed by a person skilled in the art of: o claims. A modality based on an appropriate combination ”TFT of technical means described in different modalities-is-encompassed in the ——— technical scope of the present invention. Industrial applicability The present invention is preferably applicable to lighting equipment, a backlight from a display device, etc., which requires a light source from the surface obtained by positioning a Plurality of light emitting elements from a two-dimensional shape. List of reference signs
    1. Part of the light-emitting element
    2. Light flow control part
    ] 3. Adhesive resin: 4. Substrate (fixing substrate)
    5. Substrate in Sa piece. Rear surface electrode
    6. ChipdeLED (light emitting element)
    7. Connecting member
    8. Sealing resin
    9. Fixing hole
    10. '10 21 thread. Columnar section (fastener, columnar member)
    22. Light flow control section (light flow control member)
    30. LED module (Light-emitting surface unit) O
    31. Liquid crystal module (display device)
    32. Optical sheet etc.
    33. Liquid crystal panel
    34. Backlight chassis
    35. Reflective sheet 35a. Opening
    36. Fixing member
    37.Pinode support = - - - - 41.41a 41b. PP electrode standard
    42. NS 43 wiring pattern; Closure pattern ”mr DO
    44. Recognition standard
    权利要求:
    Claims (1)
    [1]
    ] CLAIMS - 1. Light-emitting surface unit for emitting light from a light-emitting element through a light flow control member, the light flow control member being supported by a plurality of light control members support each having a predetermined height above a fixing surface of a fixing substrate on whose fixing surface the light-emitting element is fixed, and at least one of the plurality of support members being attached to the substrate of fixation through adhesive resin made of a resin material, the color of which exhibits a lesser amount of optical absorption in a region of visible light other than black.
    2. Light-emitting surface unit, according to claim 1, where each of the plurality of support members is a columnar member.
    3. Light-emitting surface unit, according to claim 1, in which each of the plurality of support members is formed integrally with the light flow control member.
    4. Light-emitting surface unit, according to claim 1, in which each of the plurality of support members is fixed F == -——— fixed in such a way as to form an angle of 60 ° or less = in relation to a long lateral direction of the fixing substrate which the direction passes through a center of the fixing substrate in a plane view—————— of the fixing substrate.
    5. Light-emitting surface unit, according to claim 1, in which only one of the plurality of support members is = - adhered -and-fixed-to the fixing substrate through the adhesive resin. O
    6. Light-emitting surface unit, according to claim 1, in which the plurality of support members is three or more - support members, only two of which are adhered and fixed to the fixing substrate through the adhesive resin.
    7. Light-emitting surface unit, according to the
    x) 'vindication 6, in which the fixing substrate has a strip shape, and the. said only two support members which are adhered and fixed to the fixing substrate through the adhesive resin are aligned in a short lateral direction of the fixing substrate.
    8. Light-emitting surface unit, according to claim 1, in which the fixing surface of the fixing substrate on which fixing surface the light-emitting element is fixed has a property that exhibits a small amount of absorption optics to a region of visible light. "10 9. Light-emitting surface unit, according to claim 8, in which a reflective sheet is provided on the fixing surface of the fixing substrate on whose fixing surface the light-emitting element is fixed.
    10. Light-emitting surface unit, according to claim 8, in which a resin material with high reflectance is applied on the fixing surface of the fixing substrate on whose fixing surface the emitting element light is fixed.
    11. Light-emitting surface unit according to claim 1, in which the recognition patterns indicative of positions in which the plurality of support members are fixed are provided on the su- === —-— — fixation surface of the fixing substrate on whose fixing surface = that of the light-emitting element is fixed. o “o 2 Unit of the light-emitting surface, according to comatei —-—— vindication 11, in which each of the recognition patterns has a size that allows the recognition patterns to be covered by the adhesive resin when the plurality of members support surface is fixed to the = substrate-fixing through the adhesive resin oo
    13. Unit of the light-emitting surface, according to claim 11, in which the recognition patterns include a fluorescent material excited after irradiation with light whose wavelength is shorter than visible light.
    14. Light-emitting surface unit, according to the
    : vindication 11, in which the recognition standards include a material. diffusion light.
    15. Light-emitting surface unit, according to claim 11, in which a color of the recognition patterns is different from an adhesive resin string
    16. Light-emitting surface unit, according to claim 11, in which each of the recognition patterns has a ring shape in a region corresponding to one end of the plurality of support members. '10 17. Light-emitting surface unit for emitting light from a light-emitting element through a light flow control member, the light flow control member to be supported by a plurality of members of support each having a predetermined height above a fixing surface of a fixing substrate: on which fixing surface the light-emitting element is fixed, and only one of the plurality of support members being adhered and fixed to the fixing substrate through adhesive resin.
    18. Display device, comprising a liquid crystal panel and a light-emitting surface unit, as defined in A = == any one. claims 1 to 17, the surface of the light emitting unit = serving as a backlight for radiating light to the NS “decrystallized liquid panel from a rear surface of the same
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    同族专利:
    公开号 | 公开日
    EP2503216B1|2021-04-14|
    JP5425220B2|2014-02-26|
    US20120206673A1|2012-08-16|
    CN102575815A|2012-07-11|
    EP2503216A4|2014-04-16|
    KR20120073303A|2012-07-04|
    CN102575815B|2015-01-21|
    WO2011062089A1|2011-05-26|
    US9158151B2|2015-10-13|
    EP2503216A1|2012-09-26|
    JPWO2011062089A1|2013-04-04|
    KR101484662B1|2015-01-26|
    TW201207506A|2012-02-16|
    US20150377426A1|2015-12-31|
    TWI412841B|2013-10-21|
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    2020-11-10| B25A| Requested transfer of rights approved|Owner name: ENPLAS CORPORATION (JP) |
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    2021-11-23| B350| Update of information on the portal [chapter 15.35 patent gazette]|
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    JP2009262339|2009-11-17|
    JP2009-262339|2009-11-17|
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