奥地利专利AT15662U1 Frameless pendant light

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专利摘要:
The present invention relates to a lamp (1), in particular a pendant lamp, comprising a holding device (6) for holding the lamp (1); at least one light source (2) for emitting light; and a planar light guide plate (3), wherein the light guide plate (3) conducts and emits the emitted light of the at least one light source (2). A flat side (30, 31) of the light guide plate (3) has a cavity (4), wherein the illuminant (2) is arranged such that it radiates within this or in this cavity (4) and wherein on or in this cavity (4) the holding device (6) is arranged.
公开号:AT15662U1
申请号:TGM429/2014U
申请日:2014-12-09
公开日:2018-04-15
发明作者:Feurle Helmut
申请人:Zumtobel Lighting Gmbh；
IPC主号:

专利说明:

description
FRAMELESS PENDANT LAMP The present invention relates to a lamp, in particular a pendant lamp, according to the preamble of claim 1 with a holding device, at least one lamp and a flat light plate.
Such lights are known for example from WO 2014/008614 A1. In this case, a light source, for example a light-emitting diode, or LED for short, is arranged on an outer end face of the light guide plate. The light emitted by the LED is coupled directly into the light guide plate due to the arrangement on the end face and is coupled out again in another area of the light guide plate for the purpose of illuminating a work station. In order to make the lamp visually appealing, the illuminant is usually covered. This is usually done with the help of a frame on the end face, the frame being arranged either all around along the end face of the light guide plate or along only one end face.
The end placement of the lamp is problematic because the lamp is largely unprotected there. The electrical control of the lamps placed on the end is also problematic. Furthermore, it is desirable to further improve the shape or the optical appearance of such luminaires, so that the frame should not be formed on the light guide plate.
It is therefore an object of the present invention to provide a lamp with a frameless light guide plate. The lamps of the lamp should be easy to supply electrically. The lamp should be inexpensive to manufacture and energy efficient. The lamp should also be robust. The illuminants in the luminaire are better protected against environmental influences.
This object is achieved by a lamp according to protection claim 1. Advantageous developments of the invention are the subject of the dependent protection claims.
According to the invention, the object is achieved by a lamp, in particular a pendant lamp. The lamp has a holder device for holding the lamp, at least one lamp for emitting light and a flat light guide plate, the light guide plate guiding and emitting the emitted light of the at least one lamp. A flat side of the light guide plate has a cavity, the illuminant being arranged in such a way that it emits within this or (preferably only) into this cavity and the illuminant is preferably arranged in this cavity. Furthermore, the holding device is arranged on or in this cavity.
According to the invention, a pendant lamp is used in particular as a lamp, the lamp being fastened to a ceiling or wall of the room by means of the holding device, as a result of which the lamp is held. Alternatively, wall lights, floor lamps or ceiling lights are also provided as lights according to the invention.
LEDs are preferably used as the illuminant, but the invention is not restricted to this. Any other (punctiform) illuminant, for example an incandescent lamp (designed in a compact design), halogen lamp or a laser diode and the like can serve as the illuminant according to the invention. The illuminant emits light. Light is in particular the part of the electromagnetic radiation that is visible to the eye. In the electromagnetic spectrum, the range of light includes wavelengths from around 380 nanometers to 780 nanometers. The regions of the infrared radiation with wavelengths between 780 nanometers and 1 millimeter and ultraviolet radiation with wavelengths between 10 nanometers and 380 nanometers, which are adjacent to the visible light, are likewise regarded as light according to the invention.
When using LEDs as illuminants is preferably at least a part / 18th
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Patent office of an LED control electronics can be provided in the luminaire. The control electronics include in particular the operating point setting of the LED and possible additional functions, for example a dimming function. The LED and the control electronics are expediently placed together on a lamp carrier. The illuminant carrier preferably carries a plurality of illuminants. In a preferred embodiment, the illuminant carrier additionally comprises a heat dissipation element, in particular a cooling element, as a result of which damage to illuminants due to high heat development and inadequate heat dissipation is avoided.
As a light guide plate is understood a light guide element which can transport light in the form of light rays in its interior. The light is preferably coupled into the light guide element. The light is further preferably coupled out of the light-guiding element and then emits into the surroundings. The light is preferably coupled in in a first area of the light guide plate and the light is coupled out in at least one second area of the light guide plate that is different from the first area of the light guide plate. This second area is at least part of a side of the light guide plate that is accessible from the outside, preferably a flat side and / or an end face of the light guide plate that is remote from the area of the light coupling.
A flat light guide plate is understood to be a light guide element which has a large ratio between a longitudinal extension and a thickness extension, so that the plate has a relatively large geometric base area in comparison to its thickness. This base area preferably serves to emit the outcoupled light.
[0012] A flat side of the light guide plate is formed with a cavity. This flat side is preferably an externally accessible upper side of the lamp. This flat side is preferably a flat side of the light guide plate inclined towards the wall or the ceiling.
According to the invention, the illuminant is arranged in such a way that it emits within or into this cavity. This enables the emitted light to be coupled into the flat light-guiding plate even outside the edge. The illuminant is preferably arranged in the cavity. By arranging the cavity in a flat side of the light guide plate, there is no need to arrange the lamps on one end face of the light guide plate. The coupling of light takes place in particular by means of the cavity of the light guide plate and the corresponding arrangement of the illuminant in such a way that it radiates into the cavity (s). The area delimiting the cavity preferably forms a coupling area for the light emitted by the illuminant into the light guide. In the case of a pendant lamp or wall lamp, the lamp is therefore not visible to a user; at least complex frame constructions can be avoided. The cavity continues to protect the lamp from a force impact on the pendant lamp, for example in the event of an unconscious collision with the lamp.
Since the holding device is provided on or in the region of the cavity, this and an optically corresponding lamp can be simply laminated without additional components.
In a preferred embodiment, the cavity of the light guide plate is an opening which extends essentially orthogonally to the flat side. The holding device can be mechanically connected to the light guide plate via the cavity, in particular in the form of a continuous opening, in order to hold the lamp. For this purpose, the light guide plate is preferably hung on the holding device. The light is preferably coupled into the light guide plate by placing the illuminant in the cavity below or within the holding device.
The lamp is preferably arranged on a lamp carrier and arranged between the holding device and the light guide plate inside or in the vicinity of the cavity. In this way, the illuminant is optically laminated and protected from external influences, in particular force impacts on the luminaire from outside, by introducing it into the cavity. An outer circumferential frame can be dispensed with, so that the lamp
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Patent office on the one hand is visually more appealing and on the other hand can be simplified, which saves manufacturing costs.
In a preferred embodiment, the illuminant is provided or attached to the holding device. In this way, an additional holder for the lamp and the lamp holder is dispensed with and the structure of the lamp is further simplified.
In an advantageous embodiment, the at least one illuminant is arranged in the cavity or provided with respect to it in such a way that its main emission direction is essentially parallel to a flat side of the light guide plate or orthogonal to an end face of the light guide plate. The illuminant (for example LED) has in particular a light-emitting main surface, the light-emitting main surface being arranged parallel to the end face of the light guide plate, so that the illuminant emits light mainly orthogonally to the end face of the light guide plate or parallel to the flat side. This arrangement of the illuminant, preferably within the cavity, thus results in a simple coupling of the emitted light into the light guide plate, in that it radiates directly perpendicularly to the inside of the cavity and is thus coupled into the latter in the plane of extension of the light guide plate. Complex light coupling mechanisms or light coupling elements can thus be dispensed with.
In an alternative embodiment, the at least one illuminant is introduced into or provided with respect to the cavity such that its main emission direction is essentially parallel to the end face of the light guide plate or orthogonal to a flat side of the light guide plate. The illuminant is designed with a light-emitting main surface, this light-emitting main surface being arranged parallel to a planar side of the light-guiding plate that is accessible from the outside (for example, light decoupling side). This enables a simple arrangement of the illuminant within or in the vicinity of the cavity. Furthermore, a simple and efficient light mixing chamber can be formed by means of a light deflecting element described below (that is to say arrangement of the illuminants (for example LEDs) 90 ° to the (main) extension plane of the light guide plate).
In a preferred embodiment, the cavity is designed as an opening, the opening being formed with a diameter that becomes smaller toward the inside of the light guide plate. This enables a further simplified coupling of the emitted light. The diameter is further preferably made non-linearly smaller, as a result of which the cavity has curved side surfaces and the coupling of light is further improved.
In a preferred embodiment, a light deflecting element is provided in the cavity, as a result of which the emitted light of the illuminant is coupled into the light guide plate in a defined manner. The light-deflecting element is arranged, for example, as a reflector, light-deflecting or reflecting layer or as a light-deflecting structure in the cavity. By introducing the light deflecting element, the light emitted, preferably orthogonal to the flat side, into or within the cavity is carried out on the end faces of the cavity, that is to say the surfaces delimiting the cavity (coupling surfaces). Due to the light deflecting element, the emitted light is coupled into the light guide plate at an angle which favors the propagation of the light within the light guide plate.
In particular, the light propagates within the light guide plate by definition by total reflection on the inner flat sides of the light guide plate, whereby the light at least partially does not leave the light guide plate on the flat sides. In this case, the light essentially emerges at the end faces of the light guide plate. To prevent this, the end faces can be provided with a reflective element or coating, so that the light reaching the end faces is directed back into the light guide plate and is provided for the main radiation of the luminaire.
In a preferred embodiment, the light deflection element or the light guide plate is such that the light is deliberately decoupled via a flat side (in particular the flat side serving as the main emission surface and facing away from the holding device). This can be done, for example, by appropriately structured elements or with light-influencing elements or
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Coatings provided flat surfaces (in particular the flat side facing the holding device). This preferably creates diffuse lighting that is particularly suitable for room lighting.
The light deflecting element preferably has at least one curvature. This curvature enables a homogeneous coupling of the emitted light into the light guide plate, as a result of which diffuse illumination is achieved by emitted light coupled out on the flat sides of the light guide plate. Alternatively or additionally, if desired, the curvature also effects beam bundling, as a result of which a slightly focused emitted light is concentrated by means of the curvature.
In a preferred embodiment, the light deflecting element has a light-influencing, in particular a reflecting or light-deflecting, coating. Such coatings are, for example, reflector layers which enable a reflective surface of the light deflecting element. Such coatings can be obtained by vapor deposition, gluing or processing the light deflecting element. This coating couples the emitted light from the illuminant into the light guide plate, preferably allowing diffuse illumination. This coating results in a more efficient coupling of light and, as a result, the maintenance of a more energy-efficient lamp. Alternatively, it is also conceivable for the same purpose to produce the light deflecting element from a corresponding light-influencing material (for example metal).
In a preferred embodiment, the light deflecting element is designed as part of the holding device, preferably as an integral part of the holding device. Thus, on the one hand, the holding device contributes to coupling the light into the light guide plate and also also to holding the light guide plate or indirectly also the lamp on a ceiling or wall. For example, the light guide plate can be hung on the light deflecting element provided as part of the holding device.
Preferably, the cavity is a continuous opening through the light guide plate, which runs essentially parallel to the end faces or substantially orthogonal to the flat side of the light guide plate. The illuminant is introduced into the cavity, for example, from a flat side of the light guide plate inclined towards the ceiling or the wall. The light deflecting element preferably closes the through opening on a flat side opposite the inclined flat side (preferably the main emission surface or side) of the light guide plate. In this way it is achieved that the entire emitted light is coupled into the light guide plate and is distributed and emitted by the light guide plate; in particular when (the rest of the) holding device also closes the cavity or opening on the side of the inclined flat side. In this case, the light guide plate can be clamped between the holding device and the deflection element (the latter then as part of the holding device) and thus held.
The light deflection elements preferably have a curved or curved upper side, so that the light is deflected onto the end faces (coupling surfaces) of the cavity and is specifically coupled into the light guide plate.
The geometry of the light deflection elements is not restricted by the invention.
For example, the light deflecting element can be round or angular.
In order to achieve a desired or targeted radiation of the luminaire, the tops of the light guide plate are preferably provided with a coating so that the emitted light cannot escape at the locations of the coating and a decoupling of light is specifically prevented. On the flat side of the light-guiding element facing away from the main emission surface, corresponding coatings can also be used to provide diffuse scattered light in a targeted manner.
[0032] In a preferred embodiment, the cavity is designed as a light mixing chamber. For example, when using differently colored LEDs, a mixture takes place
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Patent office of light from different wavelengths. A white light can thus be formed from the RGB LEDs, for example.
[0033] In a preferred embodiment, an equalizing structure is formed in the cavity. This equalizing structure ensures a uniform coupling of light and a uniform color gradient, especially when using a plurality of lamps. Diffuse lighting can also be achieved with this.
In a preferred embodiment of the invention, light conversion particles are introduced into the cavity, which convert the wavelength of the light emitted by the illuminants into another wavelength. Such light conversion particles enable the generation of light of specific wavelengths that cannot be generated using the illuminants used. In this way it is also possible to use less expensive illuminants which first emit light of an undesired wavelength, which is then converted into light of a desired wavelength by means of the light conversion particles.
The holding device is used to attach the lamp, in particular by hanging or hanging the lamp. In a preferred embodiment, the holding device is designed as a suspension or hanging device and comprises at least one support element on which the lamp is held. The suspension or hanging element is used to attach the lamp to a wall or ceiling. The carrying element is preferably a rope, a rod or a cord to which the lamp is attached by means of the holding device.
[0036] In a preferred embodiment, the lamp has at least two holding devices, as a result of which an elongated lamp can be ideally attached.
In a further preferred embodiment, the lamp has four holding devices so that large-area lamps, for example round, square, oval lamps, can be ideally attached.
[0038] The number of holding devices and carrying elements is not restrictive. For example, a plurality of holding devices can also be connected to only a single carrier element.
In a preferred embodiment, the holding device also includes the energy supply for the at least one illuminant. The carrying elements, which are connected to the holding device of the lamp for hanging the pendant lamp, advantageously have the wiring for the energy supply and / or control signals necessary for operating the lamps. Thus, the energy supply can also preferably be formed as a unit with the support element and thus this can also be provided in a laminated manner.
The present invention is described in more detail by means of embodiments with reference to the accompanying drawings. The same components in the figures are provided with the same reference numerals. For the sake of clarity, not all reference symbols are shown in all figures. To simplify the illustration, certain elements can be shown exaggeratedly large or exaggeratedly simplified.
[0041] The figures show:
Fig. 1, Fig. 2, Fig. 4 shows a cross section of a first embodiment of a lamp according to the invention;
a cross section of a second embodiment of a lamp according to the invention;
a perspective view of a third embodiment of a lamp according to the invention;
a cross section of a fourth embodiment of a lamp according to the invention;
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AT 15 662 U1 2018-04-15 Austrian Patent Office [0046] Fig. 5 [0047] Fig. 6 [0048] Fig. 7 [0049] Fig. 8 shows a cross section of a first embodiment of a light deflecting element according to the invention within a cavity according to the invention;
a cross section of a second embodiment of a light deflecting element according to the invention within a cavity according to the invention;
a cross section of a fifth embodiment of a lamp according to the invention; and a cross section of a sixth embodiment of a lamp according to the invention.
1 shows a cross section of a first exemplary embodiment of a luminaire 1 according to the invention. The elongated luminaire 1 comprises in particular a flat light guide plate 3. The light guide plate 3 has a length L which is substantially greater in relation to the thickness D. The light guide plate 3 is attached to a holding device 6. The holding device 6 is attached to a cavity 4 on the flat top 31 of the light guide plate.
The aforementioned cavity 4 is introduced within the light guide plate 3. The cavity 4 is preferably arranged centrally in the cross section. If there are several cavities 4, these are preferably arranged uniformly distributed over the light guide plate 3. For example, they can also be provided on regions of the light guide plate 3 near the edge. According to FIG. 1, the cavity 4 is a recess in the light guide plate 3 that is open toward an upper side 31 of the light guide plate 3. The recess is formed orthogonally to the longitudinal extension of the lamp 1.
In the exemplary embodiment according to FIG. 1, the cavity 4 does not go completely through the light guide plate 3. The depth of the cavity 4 is variable and depends on the material of the light guide plate 3. The depth is, for example, minimally greater than the illuminant 2 to be introduced or provided. Alternatively, the depth of the cavity 4 is approximately half the thickness D of the light guide plate 3.
[0053] Two LEDs are arranged in the cavity 4 as illuminants 2. However, the invention is not limited to the number of lamps 2. The LEDs 2 preferably have a flat light emission surface. The LEDs 2 are arranged such that the main emission direction of the LEDs 2 is essentially parallel to the flat side 30, 31 of the light guide plate 3 in the cavity 4.
A wide-angle or narrow-angle LED 2 can be used as the LED 2. The light emitted by the LED 2 is coupled into the light guide plate 3 via the cavity 4. For this purpose, the surface delimiting the cavity 4 preferably forms a coupling surface 40 for the light emitted by the illuminant 2 into the light guide 3. The coupled light is (total) on the flat inner sides 30, 31 of the light guide plate 3 depending on the entry angle of the respective light beam. reflected or coupled out at any point from the light guide plate 3. The latter can preferably be promoted by appropriate light-influencing means (coating, etc.). The flat side 30 facing away from the holding device 6 preferably forms the main radiation surface of the lamp 1 (direct lighting). Alternatively, it is also conceivable that only the flat side 31 facing the holding device 6 forms the main emission surface of the luminaire 1 (indirect lighting). As a result of this effect, a luminaire 1 is formed which, according to the surface 31 of the light guide plate 3, generates a subtle room light. The more light rays are coupled out on the top 31, the brighter the area below the lamp 1 is irradiated. Both flat sides 30, 31 can also serve to emit light from the luminaire 1. Furthermore, it is also conceivable that, additionally or alternatively, the light is coupled out via the end faces 32. However, if the latter is not desired, the end faces 32 can also be made opaque and preferably reflective (coated) so that the light falling on the end faces 32 can be directed back into the light guide plate 3 and provided there for the desired light emission.
By specifically arranging the LED 2 in or near the cavity 4 or by deliberately
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The cavity 2 can be shaped such that the light is not guided up to the end faces 32, but instead is decoupled or diffusely scattered at the area where it strikes the flat side 30, 31 of the light guide plate 3 due to a changed angle of the light beam.
The lamp 1 is a pendant lamp in the present case, which is attached by means of the holding device 6 to a ceiling or a wall in a room. The lamp 1 serves as room lighting or as workplace lighting. Other configurations of the lamp 1 are not excluded, in particular the lamp 1 can be a wall lamp, a floor lamp or a ceiling lamp.
In Fig. 2 an alternative to Fig. 1 second embodiment of a lamp 1 according to the invention is shown. Contrary to FIG. 1, an LED 2 is arranged in the cavity 4, the main emission direction of which is essentially parallel to the end faces 32 of the light guide plate 3. Furthermore, an alternative shape (coupling surface 40) of the cavity 4 is shown in FIG. 2, wherein the shape of the cavity 4 in FIG. 1 or the shape of the cavity 4 according to FIG. 1 could also be used here. This embodiment according to FIG. 2 enables simple coupling of the emitted light from the illuminant 2 into the light guide plate 3, the light spreading out in the light guide plate 3 and being provided at the desired areas for decoupling from the luminaire 1.
3 shows a perspective illustration of a third exemplary embodiment of a lamp 1 according to the invention. Here, the light guide plate 3 is shown as a square, in particular rectangular or square plate, with end faces 32 and the flat top 31 inclined towards a ceiling, not shown, and a corresponding flat bottom 30. 3 has four holding devices 6. The holding devices 6 are shown schematically here and correspond, for example, to those of FIGS. 1 and 2. The cavities 4, not shown here, are arranged below the holding device 6, in which or in the vicinity of which the LEDs 2 are provided. According to FIG. 3, each holding device 6 comprises a support element 9. The four support elements 9 are designed as wire ropes according to FIG. 3. Alternative suspension or suspension devices 9 are also conceivable, for example the support elements 9 can be rod-shaped or in the form of a cord. The invention is also not limited to the number shown.
The number of cavities 4 within the light guide plate 3 is variable according to the invention and can vary to produce a special light effect. For example, it can be provided that lamps 2, which emit light of a first wavelength, are arranged in a first cavity 4 of the light guide plate 3, whereas lamps 2, which emit light of a second wavelength, are arranged in a second cavity 4 of the light guide plate. This can then mix within the light guide plate 3 or emit it on separate areas of the lamp 1 to produce a color effect.
The number of LEDs 2 within the cavity 4 is not limited according to the invention. It is provided, for example, that at least three LEDs 2 of the colors red, green and blue (RGB LED) are included for generating mixed light. The LEDs 2 are in particular arranged on a lamp support 11, which can also include the electronic control of the LED 2, wherein the support 11 can also be arranged in or on the cavity 4 (cf. FIG. 4).
An increase in efficiency is achieved if the cavity 4, except for the coupling-in surface 40, is lined with a highly reflective material, for example by a coating 12 in the form of a mirror.
This structure according to the invention enables the light guide plate 3 to be frameless, so that the lamp 1 can be made more robust and more visually appealing. The LED 2 in the vicinity or preferably within the cavity 4 is not visible to a user of the luminaire 1 and allows design freedom when shaping the light guide plate 3.
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3 and 4, the energy supply 10 of the illuminants 2 is also provided on the support elements 9, for example by wiring 10 running in the support elements 9 (cf. FIG. 4) or wiring running around the support elements 9.
4 shows a cross section of a fourth exemplary embodiment of a lamp 1 according to the invention. Essentially different from FIGS. 1 and 2, the cavity 4 is designed as an opening that is completely through the light guide plate 3. This continuous opening can be introduced into the light guide plate 3, for example by drilling or milling. The illuminant 2 is in turn arranged in or in the vicinity of the cavity 4, the main emission direction of the LEDs 2 being parallel to the end faces 32 of the light guide plate 3.
The holding device 6 preferably comprises the support element 9, which is formed separately or integrally therewith. A power supply 10 for the LEDs 2 is arranged here within the support element 9 and leads to the illuminant carrier 11, which carries the illuminants 2 and preferably also at least part of the electronic control for the illuminant 2.
In order that the emitted light is efficiently coupled into the light guide plate 3, in particular a light deflection element 5 can be provided. The light deflecting element 5 is introduced in order to deflect the emitted light from the LEDs 2. According to FIG. 4, the spreading of the emitted light beams is shown in the form of a broken line in the left part of the light guide plate 3. The light propagation within the light guide plate 3 takes place by total resection on the inner sides 30, 31 of the light guide plate 3. It is preferably possible for a light decoupling 13 to take place already at the flat interfaces of the light guide plate 3.
The arrows indicate the light decoupling 13 from the light guide plate 3. According to the exemplary embodiment in FIG. 4, the light coupling 13 takes place both on the end face 32 and on the flat underside 30 and the flat top 31 of the light guide plate 3. As previously mentioned, however, one of the sides 30-32 or part thereof can also be used Main radiation area can be provided in a defined manner.
The light deflection element 5 is frustoconical here. As a result, the light deflection element 5 has curved upper sides, which make the coupling of light into the light guide plate 3 more efficient. This preferably also serves to scatter the light emitted by the illuminant 2 and can provide diffuse illumination due to the different coupling angles of the individual light beams within the light guide plate 3.
4, the light deflecting element 5 is shown as an integral part of the holding device 6. Thus, the light deflection element 5 serves on the one hand to couple the light and on the other hand also to hold the lamp 1. The light deflection element 5 is in particular designed as a counterpart to the holding device 6, and preferably holds the light guide plate 3 on the two opposite flat sides 30, 31 in the region of the opening and the latter also radical. For this purpose, the holding device 6 and the light deflecting element 5 can be releasably connected to one another, for example as a screw, plug and / or snap connection. Alternatively, the holding device 6 and the light deflection device 5 are made from one piece or are non-detachably connected. The luminaire 1 is then held by connecting the holding device 6 to the carrying element 9, for example by means of a releasable mechanical connection, such as a screw, plug-in and / or snap-in connection. The light guide plate 3 is attached to the holding device 6 according to FIG suspended via the support elements 9.
A frameless pendant lamp is thus produced according to the invention. The light coupling takes place, for example, according to FIG. 3 on the light guide plate 3 at the four points at which the light guide plate 3 is also attached.
4, a cover 14 of the cavity 4 is also shown, with which the illuminant 2, the cavity 4 and the illuminant carrier 11 are protected from moisture and dust. The cover 14 is frustoconical and encloses the cavity 4 and with an opening
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Patent office of a further opening, the holding element 6 or the carrying element 9. The cover 14 can serve as part of the holding device 6 for enclosing or fixing the light guide plate 3 together with a corresponding element (for example the light deflecting element 5 provided opposite the opening).
5 shows a light deflecting element 5 according to the invention. According to FIG. 5, the light deflecting element 5 has a coating 12 on its upper side, which is curved here. The coating 12 serves in particular to deflect and scatter the light beams emitted by the LEDs 2.
Due to the curvature of the light deflecting element 5, a defined distribution or diffuse scattering of the light is achieved by different propagation of light rays within the light guide plate 3. Alternatively, if desired, a curvature can also be provided in order to effect a bundling of light beams of the emitted light from the illuminant 2.
The light deflecting element 5 is preferably arranged in the cavity 4 of the light guide plate 3. If the cavity is formed as a continuous opening, the light deflecting element 5 can close the cavity 4 on one of the flat sides 30 of the light guide plate 3. If the cavity 4 is designed as a “blind hole”, the light deflecting element 5 can also simply be inserted into the cavity 4. In an alternative embodiment, it is also conceivable for the cavity 4 to have a corresponding concave or convex base region, which can be designed as a reflector, for example, by means of a reflective coating.
The cavity 4 can also be designed as a light mixing chamber. The light deflection element 5 can already be used for this purpose, by means of which the light is mixed accordingly in the cavity 4 forming the light mixing chamber. In addition, the cavity 4 can, for example, be filled with a light-influencing material. Light conversion particles 7 can be added to this. These light conversion particles 7 convert the emitted light from the illuminants 2 into a light of a different wavelength. In particular, this has the effect that light of a special wavelength, which is not easy to produce by semiconductor processes, i.a. is generated via the particles 7. These particles 7 are, for example, simple scattering particles. Alternatively or additionally, color conversion materials or phosphor material can be introduced as particles 7 in the light mixing chamber.
The LED 2 can be a monochromatic LED. For example, the LED 2 can emit red, green or blue light. The particles 7 are preferably made of a color conversion material such as e.g. a phosphor in the form of fluorescent particles. The color conversion material is used, for example, in combination with a blue LED 2, so that the color conversion material partially absorbs the blue light emitted by the LED 2 and emits yellow light. In other words, blue light is partially converted into yellow or yellowish light.
As an alternative or in addition, a color conversion material 7 can also be used which partially converts the blue light into green or greenish or red or reddish light. Mixing the generated blue and yellow light creates a more or less pronounced white light, which is coupled into the light guide plate 3.
The color-converted light, which is emitted by the phosphor particles 7, is mixed in the light mixing chamber with unconverted light and then coupled into the light guide plate 3 via the coupling surface 40.
The light deflecting element 5 is designed in particular as a truncated cone. 5 is a sectional view, it is not shown here that the LED carrier 11 is, for example, round or angular and several LEDs 2 are arranged in a ring, for example, whereby the emitted light is arranged centrally in the light guide plate 3 Cavity 4 is emitted in any direction within the light guide plate 3.
Through the light mixing chamber, the emitted light can be coupled into the Lieht9 / 18
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Patent Office Leitplatte 3 mixed and better resolved.
6, a light deflecting element 5 which is further developed to FIG. 5 is shown. In this case, equalizing structures 8 are formed on the curved upper side of the light deflecting element 5. The equalizing structures 8 are used in particular to maintain diffuse lighting. 6 indicates that a plurality of LEDs 2 can be arranged within the cavity 4. The plurality of LEDs 2 can each emit light of different and / or the same wavelength, so that, for example, a red-green-blue mixture within the cavity 4 is achieved by the equalizing structures 8 and / or the light conversion particles 7 by means of the cavity 4 as the light mixing chamber. By designing the light deflecting element 5 as a truncated cone, a defined coupling of the light via the coupling surface 40 into the light guide plate 3 is achieved. The light deflecting element 5 can be round, angular - for example quadrangular or in another form.
7 shows a cross section of a fifth exemplary embodiment of a lamp 1 according to the invention. In contrast to FIG. 4, a coating 12 is shown on the right side of FIG. 7. The flat top side 31 inclined to the ceiling fastening and the front side 32 of the light guide plate 3 are formed by means of the coating 12. This coating 12 serves to ensure that no light coupling 13 can take place in these areas of the light guide plate 3. The coating 12 on the flat top 31 can be, for example, a coating for diffuse scattering of the incident light, which is thus coupled out of the lamp 1 via the opposite flat bottom 30. The coating on the end faces 32 can be reflective, for example, in order to send the light incident there back into the light guide plate 3, so that this is completely provided for coupling out light on the flat underside 30. According to this example, the light will thus only be coupled out on the lower side 30 of the light guide plate 3. To improve the light decoupling 13, light decoupling elements 15, shown here schematically as triangles, can be provided in or on the light guide plate 3. Incident light beams are deflected at these light decoupling elements 15 in such a way that these light beams are coupled out directly from the light guide plate 3. These elements 15 can be introduced into the light guide plate 3 by means of surface processing or during the manufacture of the light guide plate 3.
7, only the end face 32 is formed with a (reflective) coating 12. Thus, light decoupling 13 cannot take place on the end face 32. The light output 13 is preferably carried out on the two flat sides 30, 31 of the light guide plate 3. This is illustrated by the arrows.
An alternative holding device 6 is also shown in accordance with FIG. 7. Here, the illuminant carrier 11 is connected, for example, directly to the holding device 6.
The light deflection element 5 is a (detachable or non-detachable) integral part of the holding device 6 and serves on the one hand to couple the light into the light guide plate 3 and on the other hand to fasten the lamp to a ceiling or a wall by means of a support element 9.
8 shows a sixth exemplary embodiment of a luminaire 1 according to the invention. A cover 14 is shown, which protects the illuminant carrier 11, the illuminants 2 and also the light deflecting element 5 within the cavity 4 from external influences. The cover 14 is in particular protected against dust and / or water. The cover 14 is coupled to the holding device 6 and is preferably formed as an integral part of the holding device 6.
On the right side of FIG. 8, the light decoupling element 15 is designed as an alternative to FIG. 7. Instead of being formed by means of triangular structures, the light decoupling elements 15 in FIG. 8 are formed, for example, by means of a schematically represented coating.
The light deflecting element 5 is alternatively configured in FIG. 8. It has a curved top (coupling surface 40) in the interior of the cavity 4, the curvature toward the center of the cavity 4
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Cavity 4 runs. The light deflection element 5 is either formed directly from or in the light guide plate 3 or is provided as an independent component in the lamp 1. By means of this light deflecting element 5, the light striking the coupling surface 40 can be refracted in such a way that it is introduced into the light guide plate 3 in a defined manner.
The invention is not limited to the features described. In particular, claimed or drawn features can be combined with the described features as desired. This applies in particular to the cavity 4 and the corresponding holding device 6 and light deflecting elements 5 with their connected elements and components, which can be combined with one another as desired. In this regard, it should be pointed out that the invention relates in particular to the design of the improved light coupling and lamp suspension. This invention and the above-described exemplary embodiments are not intended to limit how the further configuration of the light-guiding plate 3 and the corresponding light control within the same, as well as the light decoupling from it, take place.
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REFERENCE SIGN LIST
lamp
Illuminant, LED
Light guide plate
Flat (bottom) side
Flat (top) side
Face
cavity
Coupling surface
Light deflecting element
Holding device
Light conversion particles
Equalizing structures
Support element
power supply
Bulb holder
Deflection coating
Light decoupling
cover
Light decoupling elements
D thickness
L length
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权利要求:
Claims (19)
[1]
Expectations
1. lamp (1), in particular pendant lamp, comprising:
- A holding device (6) for holding the lamp (1);
- at least one illuminant (2) for emitting light; and
- A flat light guide plate (3), the light guide plate (3) guiding and emitting the emitted light of the at least one illuminant (2);
characterized:
- That a flat side (30, 31) of the light guide plate (3) has a cavity (4), the illuminant (2) being arranged such that it emits within or in this cavity (4) and being on or in this Cavity (4) the holding device (6) is arranged.
[2]
2. Luminaire according to claim 1, wherein the illuminant (2) is arranged in the cavity (4).
[3]
3. Luminaire according to claim 1 or 2, wherein the cavity (4) delimiting surface is a coupling surface (40) for the light emitted by the illuminant (2) into the light guide (3).
[4]
4. Luminaire according to one of the preceding claims, wherein the cavity (4) of the light guide plate (3) is a substantially orthogonal to the flat side (30, 31) opening, in particular an opening through the light guide plate (3).
[5]
5. Luminaire according to one of the preceding claims, wherein the holding device (6) with the light guide plate (3) is mechanically connected via the cavity, in particular in the form of a through opening, preferably the light guide plate (3) is suspended on the holding device (6) .
[6]
6. Luminaire according to one of the preceding claims, wherein the illuminant (2) is provided on the holding device (6).
[7]
7. Luminaire according to one of the preceding claims, wherein the at least one illuminant (2) is arranged in (near) the cavity (4) in such a way that its main emission direction is essentially parallel to an end face (32) of the light guide plate (3) or is substantially orthogonal to a flat side (30, 31).
[8]
8. Luminaire according to one of claims 1 to 6, wherein the at least one lamp (2) is arranged in (the vicinity) of the cavity (4) such that its main emission direction is substantially orthogonal to an end face (32) of the light guide plate (3) or substantially parallel to a flat side (30, 31) of the light guide plate (3).
[9]
9. Luminaire according to one of the preceding claims, wherein the cavity (4) designed as an opening is formed with a diameter that becomes smaller towards the inside of the light guide plate (3), preferably a non-linearly smaller diameter.
[10]
10. Luminaire according to one of the preceding claims, wherein a light deflection element (5) is provided in the cavity (4), whereby the emitted light is coupled into the light guide plate (3) in a defined manner.
[11]
11. Luminaire according to claim 10, wherein the light deflecting element (5) has at least one curvature.
[12]
12. Luminaire according to claim 10 or 11, wherein the light deflecting element (5) has a light-influencing, in particular a reflecting or light-deflecting coating (12) or is made of a corresponding light-influencing material.
[13]
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13. Luminaire according to one of claims 10 to 12, wherein the light deflecting element (5) as part of the holding device (6), preferably as an integral part of the holding device (6), is formed.
[14]
14. Light according to one of the preceding claims, wherein the cavity (4) is designed as a light mixing chamber.
[15]
15. Luminaire according to one of the preceding claims, wherein at least one equalizing structure (8) is formed in the cavity (4).
[16]
16. Luminaire according to one of the preceding claims, wherein in the cavity (4) light conversion particles (7) for converting the wavelength of the emitted light of the lamps (2) are introduced into another wavelength.
[17]
17. Lamp according to one of the preceding claims, wherein the holding device (6) is designed as a suspension or suspension device and comprises at least one support element (9) on which the lamp (1) is held.
[18]
18. Light according to one of the preceding claims, wherein the light (1) has at least two holding devices (6), preferably four holding devices (6).
[19]
19. Luminaire according to one of the preceding claims, wherein the holding device (6) comprises an energy supply (10) for the at least one illuminant (2), the energy supply preferably being designed as a unit with the support element.
4 sheets of drawings
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Fig. 1
Fig. 2
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Fig. 3
Fig. 4
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Fig. 5
Fig. 6
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同族专利:

公开号 | 公开日

WO2016030364A1|2016-03-03|

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引用文献:

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EP2951497B1|2013-01-30|2020-01-29|Ideal Industries Lighting Llc|Light engine|EP3217072B1|2016-03-09|2020-08-05|Hartmut S. Engel|Luminaire, in particular suspended luminaire|

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EP3444524B1|2017-08-18|2019-12-11|Hartmut S. Engel|Luminaire|

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法律状态:
2020-08-15| MM01| Lapse because of not paying annual fees|Effective date: 20191231 |

优先权:

申请号 | 申请日 | 专利标题

DE202014104031.5U|DE202014104031U1|2014-08-28|2014-08-28|Frameless pendant light|

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