• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A vehicle lamp includes a lamp body (20), a transparent outer cover (22) and a plane light source including a substrate (50) and an organic EL light emitting layer (54) formed on a side surface of the substrate (50). The plane light source (40) has a curved portion (41) in which the substrate (50) having a certain flexibility in a predetermined position in a portion provided with the organic EL light emitting layer (54) is curved so that an end portion of the substrate (50) is directed to one side of one side of the outer cover (22) and a side opposite to the outer cover (22) or the plane light source is provided so that at least one part of an outer peripheral end of the organic EL light emitting layer (54) emits light.
    公开号:FR3025284A1
    申请号:FR1557953
    申请日:2015-08-27
    公开日:2016-03-04
    发明作者:Toru Ito；Yoshiro Ito；Masaya Shido
    申请人:Koito Manufacturing Co Ltd；
    IPC主号:
    专利说明:

    [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle lamp and particularly relates to a vehicle lamp having a planar light source in which an organic EL light emitting layer is formed. on a substrate. 2. Description of the Related Art [0002] Due to the recent predominance of organic EL panels, the use of the organic EL panel as a light source for a vehicle lamp is proposed (see the publication of the application for Japanese Patent No. 2013-45523 OP 2013-45523 A)). The organic EL panel is generally configured by forming an organic EL light emitting layer on a side surface of a transparent substrate and sealing the organic EL light emitting layer with a sealing plate. A positive electrode layer is formed on the front side (substrate side) of the organic EL light emitting layer and a negative electrode layer is formed on the back side (sealing plate side). In the following, the positive electrode layer and the negative electrode layer are collectively referred to as "electrode layers" as appropriate. A region of an end portion of each of the electrode layers extends outwardly of the organic EL light emitting layer into the substrate for connection with an external power terminal. In addition, a junction portion between the sealing plate and the substrate is formed to surround the organic EL light emitting layer. Accordingly, in a peripheral edge portion of the organic EL panel, a non-light emitting portion that surrounds the organic EL light emitting layer is formed. The organic EL panel described above emits light in a flat manner and thus, the organic EL panel can be used for example as part of a combined rear light or a position light. In this case, the organic EL panel is installed in a predetermined position in a lamp chamber, and the substrate is fixed to a lamp body so that a light emitting surface of a source of plane light is opposite to an outer cover. As described above, the organic EL panel has the non-light emitting portion in the peripheral edge portion and the non-light emitting portion can not be used as a light source. Accordingly, for example, in the case where a light-emitting part is arranged taking into account a design quality as a vehicle lamp, the installation mode of the organic EL panel in the lamp chamber is limited. . SUMMARY OF THE INVENTION [0005] The invention provides a vehicle lamp in which the light emission design quality of the planar light source 15 is improved by a simple method in the case where the light source is plane with the organic EL light emitting layer is used in the vehicle lamp. [0006] A first aspect of the invention relates to a vehicle lamp including: a lamp body; a transparent outer cover 20 which defines a lamp chamber between the outer cover and the lamp body; and a planar light source disposed in the lamp chamber and having a light emitting surface opposite to the outer cover. The planar light source comprises a flexible substrate and an organic EL light emitting layer formed on a side surface of the flexible substrate, and the planar light source has a curved portion in which the flexible substrate is curved in a predetermined position in a portion provided with the organic EL light emitting layer so that an end portion of the flexible substrate is directed to one side of the side of the outer cover and the opposite side to the outer cover. In this aspect, by bending the flexible substrate in the position in the portion provided with the organic EL light emitting layer, it is possible to achieve a non-emitting invisible light portion at the tip portion of the curved portion or at least 35 to reveal the non-emitting small light portion when viewed from the outer cover side (front side). Accordingly, the planar light source including the curved portion (end portion after curvature seen from the front side) appears to emit light when viewed from the outer cover side (front side) and the design qualities are improved. That is, by a simple process in which the flexible substrate is curved at the portion provided with the organic EL light emitting layer, it is possible to improve the emission design qualities. of light from the plane light source. In the case where the flexible substrate is curved toward the opposite side of the outer cover (rear side), the non-light emitting portion at the tip portion of the curved portion toward the back side is positioned outside the viewed from the front and it is also possible to make the non-light-emitting part invisible when the vehicle lamp is viewed obliquely from the side. [0008] The plane light source may include a first plane light source and a second plane light source, and the first plane light source and the second plane light source may be provided so that the curved portion of the first planar light source and the curved portion of the second plane light source are positioned adjacent each other. According to this configuration, by positioning the curved portions of the two planar light sources adjacent to each other, the light-emitting portions of the planar light sources can be brought closer to each other. Accordingly, the configuration is suitable for a design process to show the two planar light sources integrated with each other or without junction. [0009] A second aspect of the invention relates to a vehicle lamp including: a lamp body; a transparent outer cover defining a lamp chamber between the outer cover and the lamp body; and a plane light source disposed in the lamp chamber. The planar light source comprises a substrate and an organic EL light emitting layer formed on a side surface of the substrate, and the plane light source is provided such that at least a portion of the outer peripheral end of the emitter layer of organic EL light emits light. The planar light source may be provided such that the at least a portion of the outer peripheral end of the organic EL light emitting layer is directed to one side of the outer cover. According to this aspect, since the outer peripheral end of the organic EL light emitting layer functions as a light source, it is possible to use the light emitting state of the outer peripheral end. in this design. This becomes effective especially in the case where a design configuration in which light is emitted in a small space is adopted. In addition, it is possible to improve the design qualities by the light emission of the plane light source by a simple method in which the outer peripheral end of the organic EL light emitting layer is directed towards the light source. 'before. The vehicle lamp may further include a main light source having a light emitting surface extending in a second direction orthogonal to a first direction in which the plane light source extends. In this case, the plane light source may be provided in a position corresponding to an end portion of the main light source. [0012] The main light source may include a first main light source and a second main light source positioned adjacent to each other, the plane light source may include a third plane light source and a fourth light source planar positioned adjacently therebetween and the third plane light source may be provided at a position corresponding to an end portion of the first main light source and the fourth planar light source is provided in a position corresponding to a end portion of the second main light source. [0013] A side surface of the organic EL light emitting layer may function as a main light emitting surface and the at least a portion of the outer peripheral end of the organic EL light emitting layer may function as as secondary light emitting surface. According to this configuration, it becomes possible to make maximum use of the light emitting portion of the plane light source and thus the luminous efficiency can be improved. The vehicle lamp may further include an optical element which directs in the same direction the light emitted from the main light emitting surface and the light emitted from the secondary light emitting surface. According to this configuration, it is possible to create a particular design obtained by simultaneously emitting light in the same direction from the main light emitting surface and the secondary light emitting surface, and to improve the luminous efficiency of the light. the light source hovers forward.
    [0002] BRIEF DESCRIPTION OF THE DRAWINGS [015] The invention will be well understood and its advantages will be better understood on reading the detailed description which follows. The description refers to the following drawings, which are given by way of example. Figure 1 is a view partially showing the rear right portion of a vehicle on which is mounted a vehicle lamp according to a first embodiment; each of Figures 2A and 2B is a sectional view through the arrows II-II of Figure 1; each of Figs. 3A and 3B is a view schematically showing the configuration of an organic EL panel used as a light source of a tail light; each of Figs. 4A and 4B is a view showing the configuration of the main part of the vehicle lamp according to a second embodiment; each of Figs. 5A and 5B is a view showing the configuration of the main part of the vehicle lamp according to a third embodiment; Each of Figs. 6A and 6B is a view showing the configuration of the main part of the vehicle lamp according to a fourth embodiment; each of Figs. 7A and 7B is a view showing the configuration of the main portion of the vehicle lamp according to a fifth embodiment; Each of Figs. 8A and 8B is a view showing the configuration of the main portion of the vehicle lamp according to a sixth embodiment; each of Figs. 9A and 9B is a view showing the configuration of the main part of the vehicle lamp according to a seventh embodiment; and each of Figs. 10A and 10B is a view showing the configuration of the main portion of the vehicle lamp according to an eighth embodiment.
    [0003] DETAILED DESCRIPTION OF THE EMBODIMENTS [0016] Embodiments of the invention will be described in detail below with reference to the drawings. Identical or equivalent components shown in the drawings are designated by the same reference numbers and the repetition of their description will be omitted appropriately. Note that a vehicle lamp described below is described by considering a combination rear lamp including a tail / stop light and a flashing light as an example, but the vehicle lamp may also be a lamp such as a traffic light. position, a lighthouse or the like. [0017] [First embodiment] Figure 1 is a view partially showing the rear right portion of a vehicle on which is mounted a vehicle lamp according to a first embodiment. Note that the vehicle lamp is also provided on the left rear of the vehicle, but its description will be omitted. A vehicle lamp 10 is a combination rear lamp provided to extend above the body 12 and the vehicle boot 14 and is configured by means of a combination of a first lamp 16 mounted on the bodywork 12 and a second lamp 18 mounted on the trunk 14. As shown in the drawing, the first lamp 16 and the second lamp 18 constitute a vehicle lamp 10 in a state in which the trunk 14 is closed and the first lamp 16 and the second lamp 18 are separated from each other when the trunk 14 is open. [0018] The vehicle lamp 10 receives a plurality of lamps in a lamp chamber defined between a lamp body 20 and an outer cover 22. That is, in the first lamp 16, a flashing light 24, a tail light 26a and a template light 28 are provided so as to be arranged from above in this order. On the other hand, in the second lamp 18, a brake light 30, a tail light 26b and a reversing light 32 are provided so as to be arranged from above in this order. The taillights 26a and 26b form an elongated rear light 26 so as to extend above the body 12 and the trunk 14. The rear light 26 uses as a light source an organic EL panel. By imagining a method of installing the organic panel 10 EL as shown in the drawing, it is possible to bring the rear lights 26a and 26b closer to one another to give them the appearance of an oblong rear light 26. The specific configuration will be described below. It should be noted that each of the flashing light 24, the clearance light 28, the stop light 30 and the reversing light 32 is a lamp comprising an LED or the like as a light source, and its configuration is a typical configuration of a kind that his description will be omitted. [0020] Each of FIGS. 2A and 2B is a cross-sectional view through the arrows II-II of FIG. 1. FIG. 2A shows the rear light 26 according to this embodiment and FIG. 2B shows a rear light 126 according to FIG. comparative example. Each of Figs. 3A and 3B is a view schematically showing the configuration of the organic EL panel used as a light source of the tail lamp 26. Fig. 3A is a front view of the organic EL panel and Fig. 3B is a sectional view. by the arrows IIIB-IIIB of Figure 3A. As shown in FIG. 2A, the rear light 26 of this embodiment is configured by installing the organic EL board in the lamp chamber of each of the first lamp 16 and the second lamp 18. This is i.e., a first organic EL panel 40a is installed in a lamp chamber 42a defined between a lamp body 20a and an outer cover 22a of the first lamp 16, and a second organic EL panel 40b is installed in a lamp chamber 42b defined between a lamp body 20b and an outer cover 22b of the second lamp 18. The first organic EL panel 40a functions as a "first plane light source" and the second organic EL panel 40b functions as than "second plane light source". Note that in the following description, based on the installation state of the organic EL panel, the outer cover side (rear side of the vehicle) is referred to as the "front side" and the opposite side to the outer cover ( front side of the vehicle) is called "back side" for the convenience of the description. Each of the outer covers 22a and 22b is formed of a transparent resin material. The outer cover 22a has an inclined shape which is curved from the inside in the transverse direction of the vehicle outwardly therein so as to conform to an aerodynamic shape of the vehicle body. The first organic EL panel 40a is mounted on the lamp body 20a in a state in which an end portion of an organic EL panel 40 described later is curved toward the back side. Similarly, the second organic EL panel 40b is also mounted on the lamp body 20b in a state in which an end portion of the organic EL panel 40 described later is curved toward the back side. Thus, a curved portion 41a of the first organic EL panel 40a in which an end portion of the first organic EL panel 40a is curved toward the back side and a curved portion 41b of the second organic EL panel 40b in which an end portion the second organic EL panel 40b is curved toward the back side are positioned adjacent to each other, viewed from the front side. The basic configuration of the organic EL panel 40 used in this embodiment will be described here. As shown in FIG. 3A, the organic EL panel 40 is the plane light source configured by a so-called flexible organic EL panel and an organic EL light emitting layer 54 is formed in the middle of a side surface of a flexible substrate. On the other hand, as shown in Fig. 3B, the organic EL panel 40 is configured by stacking a positive electrode 52, the organic EL light emitting layer 54 and a negative electrode 56 on the substrate 50 and providing for it. a sealing plate 58 such as the organic EL light emitting layer 54 is sealed from the outside. The substrate 50 is a flexible substrate formed of a thin transparent glass film. The organic EL light emitting layer 54 is configured by stacking a hole injection layer, a hole transport layer, an organic light emitting layer, and an electron transport layer from the electrode side. The organic EL light-emitting layer 54 is rectangularly shaped in a front view so as to conform to the substrate 50.
    [0004] A transparent electrode made of indium tin oxide (ITO) is used as a positive electrode 52 and a metal electrode made of aluminum or aluminum alloy is used as the negative electrode. 56. It will be appreciated that in a modification, the transparent electrode made of ITO may be used as a negative electrode 56. The positive electrode 52 is a thin film electrode layer and is disposed between the substrate 50 and the organic EL light emitting layer 54 and an end portion thereof extends to a first end of the organic EL panel 40. On the other hand, the negative electrode 56 is a thin film electrode layer and is disposed between the organic EL light emitting layer 54 and the sealing plate 58 and an end portion thereof extends to a second end of the organic EL panel 40. The positive electrode 52, the emitting layer of Organic EL light 54 and negative electrode 56 are stacked successively one above the other, for example by deposition. The terminals of an external power supply 59 are connected to the positive electrode 52 and the negative electrode 56. The sealing plate 58 is a flexible substrate made of a thin glass film and its peripheral edge portion It is attached to the substrate 50 by means of an adhesive 60. In this embodiment, an adhesive having a certain transparency is used as an adhesive 60. Thanks to the configuration described above, the sealing plate 58 and the glue 60 acts as a "sealing material" which seals the organic EL light-emitting layer relative to the outside. A gap 61 within the sealing member is filled with an inert gas. In addition, a drying agent 62 is attached to the inner surface of the sealing plate 58. [0027] By the above-described configuration, when a voltage is applied to the organic EL panel 40, holes are injected. from the positive electrode 52, electrons are injected from the negative electrode 56, a fluorescent organic compound is excited with the energy generated when the holes are combined with the electrons in an organic layer and the layer Organic EL light emitter 54 emits light. The light emitted at this point is emitted forwardly through the transparent positive electrode 52 and the transparent substrate 50.
    [0005] That is, the surface of the organic EL panel 40 on the side of the substrate 50 serves as the main light-emitting surface.  It will be appreciated that the directional characteristics of the light emission of the organic EL light emitting layer 54 conform to the lambertian pattern and the forward directivity is important.  In this embodiment, the organic EL panel 40 is curved toward the back side in a predetermined position (e.g., a position indicated by a dashed line in the drawing) in a portion provided with the emitter layer. of organic EL light 54 and is installed in the lamp chamber.  As a result, the flexible substrate described above is used in the organic EL panel 40 so that the organic EL panel 40 is not damaged or its characteristics are not modified by the curvature.  Each of Figs. 3A and 3B shows the basic configuration of the organic EL panel 40 used in this embodiment and, in the case where the organic EL panel 40 is specifically implemented as each of the first organic EL panel. 40a and the second organic EL panel 40b, the dimensions and shapes are adjusted according to its installation mode.  Note that the flexible substrate is formed on the thin glass film in this embodiment, but there are cases where it is difficult to use the substrate with the glass substrate according to the curvature of each of the curved portions 41a and 41b.  Accordingly, as a replacement for the thin glass film, a resin thin film can also be used.  It should be noted that, as described, for example, in the publication of Japanese Patent Application No. 2013-229202 OP 2013229202 A), the technique according to which the flexible organic EL board is constituted by the flexible substrate is available and thus, its description detailed will be omitted.  Returning to FIG. 2A, the first organic EL panel 40a is fixed in the lamp chamber 42a, so that most of the light emitting surface (surface of the organic EL light emitting layer 3025284 54 on the side of the substrate 50) is disposed along the outer cover 22a so as to be opposed to the outer cover 22a and an end portion thereof (left end end portion in the drawing) is curved to the side back.  At this time, the substrate 50 of the first organic EL panel 40a is curved in the position in the portion provided with the organic EL light emitting layer 54 and one end of the substrate 50 is directed to the back side, that is, that is, the opposite side to the outer cover 22a.  On the other hand, the second organic EL panel 40b is fixed in the lamp chamber 42b, so that most of the light emitting surface (surface of the organic EL light emitting layer 54 on the substrate side 50 ) is disposed along the outer cover 22b so as to oppose the outer cover 22b and an end portion thereof (right end end portion in the drawing) is curved toward the back side.  At this time, the substrate 50 of the second organic EL panel 40b is curved in the position in the portion provided with the organic EL light emitting layer 54 and one end of the substrate 50 is directed to the back side, that is, say the opposite side to the outer cover 22b.  Thanks to the configuration described above, the curved portion 41a of the first organic EL panel 40a and the curved portion 41b of the second organic EL panel 40b are positioned adjacent each other and thus it is possible to bring the one of the other light emitting parts of organic EL panels.  It will be appreciated that in the drawing, for convenience of description, the thickness of the substrate of each organic EL panel is large, but the actual thickness of each substrate is less than 1 mm and thus it is possible to significantly approximate the thickness of the substrate. one of the other the curved parts 41a and 41b.  That is, it becomes possible to fix the gap C1 between the light emitting portions of the two organic EL panels to an extremely small space.  It is thus possible to eliminate a dark part between the organic EL panels and to make them appear integrated with each other and the light emission design qualities are improved.  That is, in the state shown in FIG. 1, in which the trunk 14 is closed, it becomes possible to make the rear light 26a installed in the body 12 and the taillight appear without any junction. 26b installed in the trunk 14.  In contrast, in a comparative example shown in FIG. 2B, the entire first organic EL panel 140a is installed along the outer cover 22a and the entire second organic EL panel 140b is installed along the outer cover 22b. .  Accordingly, the non-light emitting portions 141a and 141b of the first organic EL panel 140a and the second organic EL panel 140b adjacent the ends of the substrate 50 are positioned adjacent each other.  In this configuration, a large non-light emitting portion of the non-light emitting portions 141a and 141b is formed at the boundary portion between the outer covers 22a and 22b.  That is, the space C2 between the light emitting portions of the two organic EL panels is large and a large dark portion (discontinuous portion) is formed when the entire portion is viewed as an emitting surface light of a taillight 126.  As a result, it becomes difficult to reveal without junction a rear light 126a installed in the body 12 and a rear light 126b installed in the trunk 14.  Note that in the drawing, the spaces C1 and C2 are shown for convenience of description.  The actual length of the non-emitting light portion has a considerable size relative to the thickness of the organic EL panel and thus, the difference between the space C1 space C2 is apparent and the difference is much greater than the difference represented 25 on the drawing.  In other words, according to this embodiment, thanks to a simple process in which each of the organic EL panels 40a and 40b is curved in a position at the portion provided with the organic EL light emitting layer 54 the organic EL panels 40a and 40b including the curved portions 41a and 41b (end portions after curvature) appear to emit light as viewed from the front side.  By arranging the two organic EL panels 40a and 40b each having the above configuration such that their curved portions 41a and 41b are positioned adjacent each other, it is possible to make them appear to emit light as a source of plane light, and enhance the design qualities of the tail lamp 26.  302 5 2 8 4 13 [Second Embodiment] Each of Figures 4A and 4B is a view showing the configuration of the main portion of the vehicle lamp according to a second embodiment.  The drawings correspond to Figure 2A of the first embodiment.  Figure 4A shows the configuration of the main part and Figure 4B shows the operating state of the main part.  Note that in the following description, the points which are different from the first embodiment will be mainly described and the constituent elements common with the first embodiment are designated by the same reference numbers and their description will be omitted.  As shown in FIG. 4A, a rear light 226 of this embodiment has a character in which the light-emitting portions of the adjacent taillights 226a and 226b are shown without junction by effectively using the light emitted by a outer peripheral end of the organic EL panel and what is called the substrate mode light.  "Substrate mode light" here means the light that is emitted from the end portion of the substrate 50 without being emitted toward the front of the substrate 50 while being totally reflected in the substrate 50.  The rear light 226a comprises a first organic EL panel 240a extending in the transverse direction of the vehicle in the lamp chamber 42a and a third organic EL panel 240c extending in the longitudinal direction of the vehicle.  Each of the organic EL panels 240a and 240c does not have the curved portion of the first embodiment.  The first organic EL panel 240a is provided slightly back (upper side in the drawing) of the lamp body 20a, so that its main light emitting surface is directed forward.  On the other hand, the third organic EL panel 240c is provided to extend along the inner end (left end in the drawing) of the lamp body 20a into a position corresponding to an end portion of the first 240a organic EL panel.  As shown in the drawing, the angle formed between the first organic EL panel 240a and the third organic EL panel 240c is set at 90 degrees.  The first organic EL panel 240a operates as the "first main light source" and the third organic EL panel 240c operates as a "third plane light source".  The longitudinal direction of the vehicle is here an example of "first direction in which extends the first plane light source" and the transverse direction of the vehicle is an example of "second direction orthogonal to the first direction in which s' extends the light emitting surface of the main light source.  A reflector 242 is disposed between the organic EL panels 240a and 240c.  Reflector 242 functions as an "optical element".  On the other hand, the rear light 226b has a configuration similar to that of the rear light 226a.  That is, the tail light 226b has a second organic EL panel 240b that extends transversely of the vehicle in the lamp chamber 42b and a fourth organic EL panel 240d that extends in the direction 15 longitudinal axis of the vehicle.  The second organic EL panel 240b is provided slightly behind the lamp body 20b so that its main light emitting surface is directed forward.  On the other hand, the fourth organic EL panel 240d is provided to extend along the outer end (right end in the drawing) of the lamp body 20b to a position corresponding to an end portion of the lamp body. second 240b organic EL panel.  As shown in the drawing, the angle formed between the second organic EL panel 240b and the fourth organic EL panel 240d is set at 90 degrees.  The second organic EL panel 240b operates as a "second main light source" and the fourth organic EL panel 240d operates as a "fourth plane light source".  In addition, the reflector 242 is disposed between the organic EL panels 240b and 240d.  The second organic EL panel 240b is positioned substantially on the same plane as the plane on which the first organic EL panel 240a is positioned.  In addition, the second organic EL panel 240b is adjacent to the first organic EL panel 240a in the transverse direction of the vehicle and the fourth organic EL panel 240d is adjacent to the third organic EL panel 240c in the transverse direction of the vehicle.  With the configuration described above, when the rear light 226 is actuated, the light emission indicated by the arrows on FIG. 4B is effected.  That is, light is emitted forward from the main light emitting surface of each of the first organic EL panel 240a and the second organic EL panel 240b.  On the other hand, the main light emitting surface of the third organic EL panel 240c is directed to the outer side in the transverse direction of the vehicle (right direction in the drawing) and part of the light emitted by the transmitting surface of the vehicle. Main light is reflected forward by the reflector 242.  In addition, light is emitted from a front outer peripheral end of the organic EL light emitting layer 54 of the third organic EL panel 240c, and the substrate mode light is emitted from a front outer peripheral end of the substrate 50.  That is, the light emitted from the surface (hereinafter also referred to as the "secondary light emitting surface") which is not the main light emitting surface of the third organic EL panel 240c is directed to the 'before.  The main light emitting surface of the fourth organic EL panel 240d is directed to the inner side in the transverse direction of the vehicle (left direction in the drawing) and part of the light emitted by the main light emitting surface. is reflected towards the front by the reflector 242.  In addition, light is emitted from a front outer peripheral end of the organic EL light emitting layer 54 of the fourth organic EL panel 240d, and substrate mode light is emitted from a front outer peripheral end of the substrate 50. .  That is, the light emitted by the secondary light emitting surface of the fourth organic EL panel 240d is directed forward.  [0041] Thus, in this embodiment, it is possible for the organic EL panels 240c and 240d provided at the boundary between the rear lights 226a and 226b to emit light toward the front side in the vicinity of the boundary between the panels. 240c and 240d organic EL and it is thus possible to collectively bring together the light-emitting portions of the rear lights 226a and 226b.  That is, it becomes possible to fix the gap C3 between the light emitting portions of the tail lights 226a and 226b to an extremely small space.  Thus, in the state shown in Figure 1 in which the trunk 14 is 302 5 2 8 4 16 closed, it becomes possible to make appear without junction the rear light 226a installed in the body 12 and the rear light 226b installed in the chest 14, and the design qualities of the light emission are improved.  [Third Embodiment] Each of Figs. 5A and 5B is a view showing the configuration of the main portion of the vehicle lamp according to a third embodiment.  Figure 5A shows the configuration of the main part and Figure 5B shows the operating state of the main part.  Note that in the following description, the points which differ from the second embodiment will be mainly described, and the constituent elements common with the second embodiment are designated by the same reference numbers and their description will be omitted.  As shown in FIG. 5A, in a rear light 326 of this embodiment, in place of the reflector 242 of the second embodiment, a reflective film is deposited on each organic EL panel.  That is, a reflective film 342 is provided at an end portion in the vicinity of the third organic EL panel 240c in the first organic EL panel 240a.  On the other hand, reflective films 344 are provided at the two end portions of the third organic EL panel 240c.  Each reflective film is formed by depositing a metal film on the upper surface of the substrate 50.  Similarly, the reflective film 342 is provided at the end portion in the vicinity of the fourth organic EL panel 240d in the second organic EL panel 240b.  On the other hand, reflective films 344 are provided at the two end portions of the fourth organic EL panel 240d.  Each reflective film is formed by depositing the metal film on the upper surface of the substrate 50.  With the configuration described above, when the rear light 326 is actuated, the light emission indicated by the arrows in Figure 5B is performed.  That is, light is emitted forward from the main light emitting surface of each of the first organic EL panel 240a and the second organic EL panel 240b.  The directional characteristics of the light emission are in accordance with the Lambertian pattern, and thus some of the light emitted by the first organic EL panel 240a is reflected forward by the reflective films 344 of the third. 240c organic EL panel.  In addition, a portion of the light emitted by the second organic EL panel 240b is reflected forwardly by the reflective films 344 of the fourth organic EL panel 240d.  On the other hand, part of the light emitted by the main light emitting surface of the third organic EL panel 240c is reflected forwardly by the reflective film 342 of the first organic EL panel 240a.  In addition, light is emitted forwards from the front outer peripheral end (secondary light emitting surface) of the third organic EL panel 240c.  Similarly, a portion of the light emitted by the main light emitting surface of the fourth organic EL panel 240d is reflected forwardly by the reflective film 342 of the second organic EL panel 240b.  In addition, light is emitted forwards from the front outer peripheral end (secondary light emitting surface) of the fourth organic EL panel 240d.  Thus, according to this embodiment also, it is possible to emit light by the organic EL panels 240c and 240d provided at the limit between the rear lamps 326a and 326b towards the front side in the vicinity of the limit. between the organic EL panels 240c and 240d and it is thus possible to bring the light-emitting parts of the taillights 326a and 326b closer to one another.  [0047] [Fourth Embodiment] Each of Figs. 6A and 6B is a view showing the configuration of the main portion of the vehicle lamp according to a fourth embodiment.  Fig. 6A shows the configuration of the main part and Fig. 6B shows the operating state of the main part.  Note that in the following description, the points which differ from the second embodiment will be mainly described and the constituent elements common with the second embodiment are designated by the same reference numbers and their description will be omitted.  As shown in FIG. 6A, in a rear light 426 of this embodiment, a reflector 442 whose shape is different from that of the reflector 242 of the second embodiment is provided as a "That optical element".  The reflector 442 has an L-shaped section and has two reflecting surfaces that are orthogonal to each other.  That is, the reflector 442 is disposed at each of a boundary portion between the first organic EL panel 240a and the third organic EL panel 240c and a boundary portion between the second organic EL panel 240b and the fourth panel. 240d organic EL.  With the configuration described above, when the rear light 426 is actuated, the light emission indicated by the arrows in FIG. 6B is effected.  That is, light is emitted forward from the main light emitting surface of each of the first organic EL panel 240a and the second organic EL panel 240b.  Part of the light emitted by the first organic EL panel 240a is reflected forwardly by one of the reflecting surfaces of the reflector 442.  Part of the light emitted by the second organic EL panel 240b is also reflected forwards by one of the reflecting surfaces of the reflector 442.  On the other hand, a portion of the light emitted by the main light-emitting surface 20 of the third organic EL panel 240c is reflected forwardly by the other reflective surface of the reflector 442.  In addition, light is emitted forwards from the front outer peripheral end (secondary light emitting surface) of the third organic EL panel 240c.  Similarly, a portion of the light emitted from the main light-emitting surface of the fourth organic EL panel 240d is reflected forwardly by the other reflective surface of the reflector 442.  In addition, light is emitted forwardly from the front outer peripheral end (secondary light emitting surface) of the fourth organic EL panel 240d.  Thus, according to this embodiment also, it is possible for the organic EL panels 240c and 240d provided at the boundary between the rear lamps 426a and 426b to emit light towards the front side in the vicinity of the boundary between the organic EL panels 35 240c and 240d and it is thus possible to bring together collectively the light-emitting parts of the taillights.  302 5 2 8 4 19 [0052] [Fifth Embodiment] Each of Figs. 7A and 7B is a view showing the configuration of the main part of the vehicle lamp according to a fifth embodiment.  Figure 7A shows the configuration of the main part and Figure 7B shows the operating state of the main part.  Note that in the following description, the points which differ from the second embodiment will be mainly described, and the constituent elements common with the second embodiment are designated by the same reference numerals and their description will be omitted.  As shown in FIG. 7A, in a rear light 526 of this embodiment, a transparent light guiding body 542 is provided on the upper surface of each of the third organic EL panel 240c and the fourth organic EL panel 15. 240d.  The light guiding body 542 functions as an "optical element".  The light guiding body 542 provided in the third organic EL panel 240c extends to a position in the vicinity of the first organic EL panel 240a.  The light guiding body 542 provided in the fourth organic EL panel 240d extends to a position adjacent the second organic EL panel 240b.  Each light guiding body 542 is wedge-shaped whose section is tapered toward the front side, and contains a diffusion agent that effectively disperses the light propagating in the inner portion of the light guiding body 542. .  With the configuration described above, when the rear light 526 is actuated, the light emission indicated by the arrows in FIG. 7B is effected.  That is, the light emitted from the main light emitting surface of the third organic EL panel 240c and the light emitted from a portion near the end portion of the first organic EL panel 240a is diffused into the propagation process in the light guiding body 542 and are emitted from a transmitting surface defined by the shape of the light guiding body 542.  Similarly, the light emitted from the main light-emitting surface of the fourth organic EL panel 240d and the light emitted from a portion adjacent the end portion of the second organic EL panel 240b are scattered in the process. 84 propagates in the light guide body 542 and is emitted by the emission surface defined by the shape of the light guide body 542.  Each emitted light has a forward component.  Thus, by providing the light guiding bodies 542 on the front side of the non-emitting light portion formed between the first organic EL panel 240a and the second organic EL panel 240b it is possible to display without junction the emission of light by the rear lights 526a and 526b.  [Sixth Embodiment] Each of Figs. 8A and 8B is a view showing the configuration of the main part of the vehicle lamp according to a sixth embodiment.  Fig. 8A shows the configuration of the main part and Fig. 8B shows the operating state of the main part.  Note that in the following description, the points which differ from the fifth embodiment will be mainly described and the constituent elements common with the fifth embodiment are designated by the same reference numerals and their description will be omitted.  As shown in FIG. 8A, in a rear light 626 of this embodiment, a light guiding body 642 which is different from the light guiding body 542 of the fifth embodiment is provided as "qua 'optical element'.  The light guiding body 642 is a transparent light guiding body having an L-shaped section and does not contain the diffusion agent.  With the configuration described above, when the rear light 626 is actuated, a light emission indicated by the arrows in FIG. 8B is effected.  That is, the light emitted from the main light emitting surface of the third organic EL panel 240c and the light emitted from a portion near the end portion of the first organic EL panel 240a are emitted in a direction determined by the shape of the light guiding body 642.  Similarly, the light emitted from the main light-emitting surface of the fourth organic EL panel 240d and the light emitted from a portion near the end portion of the second organic EL panel 240b are emitted in a direction 302.5. 8 4 21 determined by the shape of the light guiding body 642.  Each emitted light has a forward component.  Thus, in this embodiment also, by providing the light guiding bodies 642 on the front side of the non-emitting light portion formed between the first organic EL panel 240a and the second organic EL panel 240b, it is possible to make appear without junction the emission of light by the rear lights 626a and 626b.  [Seventh Embodiment] Each of Figs. 9A and 9B is a view showing the configuration of the main portion of the vehicle lamp according to a seventh embodiment.  Figure 9A shows the configuration of the main part and Figure 9B shows the operating state of the main part.  This embodiment assumes the case where a plurality of organic EL panels are provided in a lamp chamber.  As shown in FIG. 9A, the rear light 726 of this embodiment is configured by arranging a first organic EL panel 740a and a second organic EL panel 740b on the same plane.  The opposite surface of the substrate 750 of each of the organic EL panels is shaped as a tapered end surface 752.  That is, an end portion of the substrate 750 is treated to have an acute angle.  In addition, a flat reflector 742 is disposed on the back side of the two organic EL panels.  With the configuration described above, when the rear light 726 is actuated, the light emission indicated by the arrows in FIG. 9B is effected.  That is, light is emitted forward from the main light emitting surface of each of the first organic EL panel 740a and the second organic EL panel 740b.  A portion of the emitted light becomes the substrate mode light propagating in the substrate 740 due to the total reflection, and is reflected or refracted at the end surface 752.  Reflected light at the end surface 752 is emitted from the front of the substrate 750.  On the other hand, the refracted light at the end surface 752 is reflected by the backside reflector 742 and is emitted forward.  Thanks to the configuration described above, it becomes possible to eliminate or reduce the non-light emission part between the panels of the plurality of organic EL panels 740a and 740b which are arranged in parallel.  In addition, it is possible to guide the substrate mode light forward, and it is thus possible to increase the light output of the organic EL panels 740a and 740b.  [Eighth Embodiment] Each of Figs. 10A and 10B is a view showing the configuration of the main portion of the vehicle lamp according to an eighth embodiment.  Figure 10A shows the configuration of the main part is Figure 10B shows the operating state of the main part.  Note that in the following description, the points which differ from the first embodiment will be mainly described and the constituent elements common with the first embodiment are designated by the same reference numerals and their description will be omitted.  As shown in FIG. 10A, in the rear light 826 of this embodiment, an end portion of the organic EL panel is curved toward a side opposite to the first embodiment.  That is, in a curved portion 841a of a first organic EL panel 840a and a curved portion 841b of a second organic EL panel 840b, the end portions of the organic EL panels 840a and 840b are curved toward forward.  Thus, in each organic EL panel, one end of the substrate 50 is directed forward, i.e. the side of the outer cover 22.  With the above configuration also, it is also possible to bring the light emitting parts of the organic EL panels 840a and 840b closer together by positioning the curved portion 841a of the first organic EL panel 840a and the curved portion 841b of the second organic EL panel 840b adjacent to each other.  It is thus possible to eliminate the dark part between the organic EL panels 840a and 840b to make them appear integrated with each other, and the design qualities of the light emission are improved.  With the configuration described above, when the rear light 826 is actuated, the light emission indicated by the arrows on FIG. 10B is effected.  That is, the light emitted from the main light-emitting surface of each of the organic EL panels 840a and 840b and the light emitted from the end portion of each of the organic EL panels 840a and 840b are emitted toward each other. forward.  The light emitted by each of the curved portions 841a and 841b of the organic EL panels 840a and 840b also has a forward component.  It is thus possible to make appear without junction the emission of light by the rear lights 826a and 826b.  The invention has been described so far with reference to the embodiments, but the invention is not limited to the embodiments described above, and variants in which the configurations of the embodiments are suitably combined or replaced are also encompassed by the invention.  In addition, appropriate modifications of the combinations or orders of the processes of the embodiments can be made and various modifications such that design changes can be made with respect to the embodiments based on the knowledge of a man of the invention. art.  These modified embodiments may also fall within the scope of the invention.  Although not described in the seventh embodiment described above, the end surface 752 of the substrate 750 may be subject to surface texturing.  It is thus possible to disperse the substrate mode light using its texture and to emit light from a portion between the panels 740a and 740b in a different manner from that of the seventh embodiment.  The above embodiments have described an exemplary configuration in which the same arrangement of the organic EL panels and other optical elements (substantially symmetrical with respect to the line of delimitation between the lamps) is applied to the a plurality of tail lights arranged in parallel.  In one modification, one of the rear lights arranged in parallel may have the structure of an embodiment different from that of the other rear light.  The above embodiments have described an example in which the metal electrode is used as the negative electrode of the organic EL panel, but a transparent electrode formed of ITO can also be used as the negative electrode 56 of 302 5 2 8 4 24 similar to the positive electrode 52.  It thus becomes possible to emit light from the parts on both sides of the outer peripheral end of the organic EL light emitting layer 54.  The above embodiments have described the LED as a light source of the lamp other than the tail lamp as an example, but a laser diode, a discharge lamp bulb, an incandescent lamp or a lamp. Halogen bulb can also be used.  Alternatively, similarly to the rear light, the organic EL panel can also be used.  The above embodiments have described an example in which the configuration of the main part described above is applied to the rear light, but its configuration can also be applied to other lamps such as a stop lamp and a clearance light.  Although not described in the embodiments above, one of the light sources of the plurality of lamps arranged in parallel may be constituted by the organic EL panel and its other light source may be constituted by other light sources such as the LED.  In this case, the light emission of the plurality of integrated or junctionless lamps can be seen by mounting the light guide body to the other light source.
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. A vehicle lamp including: a lamp body (20); a transparent outer cover (22) which defines a lamp chamber (42) between the outer cover (22) and the lamp body (20); and a planar light source (40; 840) disposed in the lamp chamber (42) and having a light emitting surface opposite to the outer cover (22), wherein the plane light source (40; 840) comprises a substrate flexible lens (50) and an organic EL light emitting layer (54) formed on a side surface of the flexible substrate (50), the vehicle lamp being characterized in that the plane light source (40; 840) has a curved portion (41a, 41b; 841a, 841b) in which the flexible substrate (50) is curved in a predetermined position in a portion provided with the organic EL light emitting layer (54) so that an end portion of the flexible substrate (50) is directed to one side of one side of the outer cover (22) and one side opposite to the outer cover (22).
    [0002]
    The vehicle lamp according to claim 1, wherein the planar light source comprises a first plane light source (40a; 840a) and a second plane light source (40b; 840b); and the first plane light source (40a; 840a) and the second plane light source (40b; 840b) are provided so that the curved portion (41a; 841a) of the first planar light source (40a; 840a) and the curved portion (41b; 841b) of the second plane light source (40b; 840b) are positioned adjacent each other.
    [0003]
    A vehicle lamp including: a lamp body (20); a transparent outer cover (22) defining a lamp chamber (42) between the outer cover (22) and the lamp body (20); and a planar light source (240c; 240d) disposed in the lamp chamber (42), wherein the planar light source (240c; 240d) comprises a substrate (50) and an organic EL light emitting layer (54); ) formed on a side surface of the substrate (50), the vehicle lamp being characterized in that the plane light source (240c; 240d) is provided so that at least a portion of the outer peripheral end of the organic EL light emitting layer (54) emits light.
    [0004]
    The vehicle lamp according to claim 3, further comprising a main light source (240a; 240b) having a light emitting surface extending in a second direction orthogonal to a first direction in which the a plane light source, wherein the plane light source (240c; 240d) is provided in a position corresponding to an end portion of the main light source (240a; 240b).
    [0005]
    A vehicle lamp according to claim 4, wherein the main light source (240a; 240b) has a first main light source (240a) and a second main light source (240b) positioned adjacent each other; The plane light source (240c; 240d) has a third plane light source (240c) and a fourth plane light source (240d) positioned adjacent each other; and the third plane light source (240c) is provided in a position corresponding to an end portion of the first main light source (240a) and the fourth planar light source (240d) is provided in a position corresponding to an end portion of the second main light source (240b).
    [0006]
    The vehicle lamp according to any one of claims 3 to 5, wherein a side surface of the organic EL light emitting layer (54) functions as a main light emitting surface; and the at least a portion of the outer peripheral end of the organic EL light emitting layer (54) functions as a secondary light emitting surface. 302 5 2 8 4 27
    [0007]
    A vehicle lamp according to claim 6, further comprising an optical element (242; 342; 442; 542; 642) which directs in the same direction the light emitted from the main light-emitting surface and the light emitted from the surface secondary light emitter.
    [0008]
    A vehicle lamp according to any one of claims 3 to 7, wherein the plane light source (240c; 240d) is provided so that at least a portion of the outer peripheral end of the light emitting layer Organic EL (54) is directed to one side of the outer cover (22).
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    同族专利:
    公开号 | 公开日
    DE102015216413A1|2016-03-03|
    CN105387407A|2016-03-09|
    US20160061397A1|2016-03-03|
    CN105387407B|2019-08-27|
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    JP6431319B2|2018-11-28|
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    法律状态:
    2016-07-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-07-14| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-12| PLFP| Fee payment|Year of fee payment: 4 |
    2019-07-11| PLFP| Fee payment|Year of fee payment: 5 |
    2020-01-10| PLSC| Publication of the preliminary search report|Effective date: 20200110 |
    2020-07-15| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-15| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014175590A|JP6431319B2|2014-08-29|2014-08-29|Vehicle lighting|
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