JP5473088B2 - Large surface-emitting light fixture - Google Patents

Description

  The present invention relates to a lighting apparatus using a planar light source.

  In recent years, there has been a demand for increasing the size of lighting fixtures using planar light sources such as organic EL display devices. In order to increase the size of the light emitting surface, when the substrate is increased in size, the scale of a manufacturing apparatus such as a TFT (thin film transistor) manufacturing line in the manufacturing process is inevitably increased. In addition, there is a concern that the yield may be reduced by increasing the size of the substrate. Therefore, there exists a lighting fixture intended to emit light without gaps by arranging planar light sources manufactured on the basis of a substrate having a relatively high production efficiency on a plurality of planes.

  The lighting fixture 100 of FIG. 3 is an example of such a lighting fixture, and a plurality of organic EL light emitting elements (planar light sources) 110 are arranged on a substrate 120 as a support member. A power feeding unit 130 for supplying current from the substrate 120 to the organic EL light emitting device 110 is provided on the upper surface of the substrate 120 and on the side surface of the organic EL light emitting device 110.

JP 2005-266285 A

  In such a conventional lighting fixture, as shown in FIG. 4, a plurality of lighting fixtures 100 are arranged in a planar shape to obtain a large surface emitting lighting fixture 200 having a larger light emitting surface. However, since there is also a member around the planar light source of the luminaire 100, the outer edge of the substrate 120 in the example of FIG. 3, the distance between the light sources in the luminaire (a in FIG. 4) and the recent luminaire's recent There will be a difference in the distance between the light sources in contact (b or c in FIG. 4) (a <b, a <c in FIG. 4). Accordingly, a gap is generated in the light emitting surface of the large surface emitting lighting fixture. Since no light is emitted from this gap, unevenness of light occurs.

  In order to solve the above problem, it is conceivable to increase the number of planar light sources (the number of organic EL light emitting elements 110) per lighting fixture. Deterioration of maintenance performance and maintenance performance.

  Then, an object of this invention is to provide the lighting fixture which is hard to produce a clearance gap even if it arranges two or more.

Large surface emitting lighting device of the invention, a plurality of lighting fixtures, a large surface emitting luminaire constructed by arranging on a plane, the luminaire comprises a plurality of surface light source, the plurality of A lighting device comprising a support member for supporting a planar light source, wherein at least one end surface of the planar light source and at least one end surface of the support member are located substantially on the same plane , A light diffusing panel disposed on the light emitting surface side of the planar light source so as to cover the planar light source, and an end surface of the light diffusing panel is substantially flush with an end surface of the planar light source and the support member; A taper surface is formed by cutting a corner portion of the planar light source, and the light diffusing panel includes a leg portion disposed on the support member. Produced by the tapered surface It is disposed in the space.

  According to the said structure, even if it arranges several lighting fixtures, it becomes difficult to produce a clearance gap between lighting fixtures, and manufacture of a large surface emitting lighting fixture with little unevenness of light becomes easy.

  In the large surface-emitting light fixture, it is preferable that a power feeding unit is disposed on a surface of the planar light source on the support member side.

  According to the above configuration, it is possible to easily position at least one end face of the planar light source and at least one end face of the support member on substantially the same plane.

  An example of the planar light source is an organic EL light emitting element.

  According to the present invention, it is possible to prevent a gap from occurring even when a plurality of lighting fixtures are arranged. Therefore, it becomes easy to manufacture a large-sized surface-emitting luminaire that hardly causes unevenness of light.

It is a figure which shows the lighting fixture of the 1st Embodiment of this invention, a large surface emitting lighting fixture, (a) is the figure which looked at the lighting fixture from the front, (b) is sectional drawing of a lighting fixture, (C) is a perspective view of a large surface-emitting light fixture. It is a figure which shows the lighting fixture of the 2nd Embodiment of this invention, (a) is the figure which looked at the lighting fixture from the front, (b) is sectional drawing of a lighting fixture, (c) is a lighting fixture. FIG. It is a figure which shows the conventional lighting fixture, (a) is the figure which looked at the lighting fixture from the front, (b) is sectional drawing of a lighting fixture. The perspective view which shows the other conventional lighting fixture.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a view showing a lighting fixture and a large surface emitting lighting fixture according to the first embodiment of the present invention. The luminaire 10 includes a plurality of organic EL (Electroluminescense) light emitting elements 11 as planar light sources and a substrate 12 as a support member that supports the organic EL light emitting elements 11.

  The organic EL light emitting element 11 is formed by arranging a plurality of pixels (not shown) in a matrix, and a switching TFT (Thin Film Transistor) is formed in each pixel. In the present invention, the organic EL light emitting element is exemplified as the planar light source, but the type of the light source is not particularly limited.

  In the present embodiment, a plurality of organic EL light emitting elements 11 are arranged on a single substrate 12, and the substrate 12 functions as a support member that supports the organic EL light emitting elements 11. As shown in FIG. 1B, an electrode 12 a is embedded in the substrate 12 and combined with the electrode 11 a of the organic EL light emitting element 11, a power feeding unit that supplies current to the organic EL light emitting element 11 is configured. . That is, the power feeding unit is disposed on the surface of the organic EL light emitting element 11 on the substrate 12 side.

  In the present embodiment, as indicated by a dotted line L, the end surface of the organic EL light emitting element 11 and the end surface of the substrate 12 are located on substantially the same plane. In the present embodiment, unlike the lighting fixture of FIG. 3, the power feeding portion is disposed on the surface of the organic EL light emitting element 11 on the substrate 12 side (the back surface of the organic EL light emitting element). Twelve end faces can be positioned substantially on the same plane. Here, “the end faces are substantially on the same plane” means that the end faces of the organic EL light-emitting elements 11 do not generate gaps that cause unevenness of light when the lighting fixtures 10 are arranged adjacent to each other. And the end face of the substrate 12 are located on the same plane.

  With such a configuration, the arrangement interval (arrangement pitch) of the organic EL light emitting elements 11 is equal even when the plurality of lighting fixtures 10 are arranged in any direction, and a gap is prevented from being generated between the organic EL light emitting elements 11. be able to. FIG.1 (c) shows the large surface emitting illuminating device 20 comprised by arranging the lighting fixture 10 for every plurality (4 pieces in a figure) on a plane. As can be seen from this figure, the arrangement interval (arrangement pitch) of the organic EL light emitting elements 11 is always a in both the vertical and horizontal directions of the matrix, and no gap is generated on the light emitting surface. Therefore, unlike the large surface light-emitting luminaire shown in FIG. 4, it is possible to prevent unevenness of light even if a plurality of luminaires 10 are arranged. Is easy.

(Second Embodiment)
FIG. 2 is a diagram illustrating a lighting fixture according to a second embodiment of the present invention. In the lighting fixture 100 of this embodiment, the taper surface 11b is formed in the corner | angular part of each organic EL light emitting element 11 by cutting a corner | angular part. Furthermore, the light diffusing panel 14 is provided above the light emitting elements with a space S so as to cover the plurality of organic EL light emitting elements 11. The light diffusing panel 14 is manufactured by mixing another resin having a light diffusing action in a transparent resin such as an acrylic resin, but is not particularly limited as long as it has a light diffusing action.

  The tapered surfaces 11b are provided at the four corners of the organic EL light emitting element 11, and function as notches for creating a space for arranging the leg portions 14a of the light diffusion panel 14 on the substrate 12. The shape of the notch portion is not limited to the tapered surface 11b as shown in the drawing as long as it can create a space for arranging the support portion of the light diffusion panel 14 such as the leg portion 14a on the substrate 12.

  The light diffusion panel 14 is arranged on the light emitting surface side of each organic EL light emitting element 11, the lighting fixture 10, and eventually the large surface emitting lighting fixture 20. That is, in this example, the organic EL light emitting element 11 employs a top emission type. As indicated by a dotted line L, the end surface of the light diffusion panel 14 is also located substantially on the same plane as the end surfaces of the organic EL light emitting element 11 and the substrate 12.

  In the present embodiment, it is possible to obtain more uniform planar light by the action of the light diffusion panel 14. Light is not emitted in the portion where the tapered surface 11b exists, but the unevenness of the light is mitigated by the presence of the space S and the light diffusion panel 14, and the level is practically satisfactory.

  In the present embodiment, the light diffusing panel 14 covers the single luminaire 10. However, the light diffusing panel 14 may be further increased in size to cover a large surface-emitting luminaire composed of a plurality of luminaires 10 as shown in FIG.

  In all the embodiments described above, the plurality of organic EL light emitting elements 11 are provided on the substrate 12. However, even if the single organic EL light emitting element 11 is provided on the substrate 12, the effect of the present invention is achieved.

  According to the said structure, it becomes possible to manufacture a large sized surface emitting lighting fixture more simply.

  In all the embodiments described above, all the end faces of the organic EL light emitting element 11 are located on substantially the same plane as all the end faces of the substrate 12. However, even if at least one end face of the organic EL light emitting element 11 is located substantially on the same plane as at least one end face of the substrate 12, the effect of the present invention is achieved. In addition, lighting fixtures and large surface emitting lighting fixtures are not only fixtures that directly emit illumination light, but also displays and parts thereof that transmit predetermined information by light (including both visible and invisible light). Including. For example, the lighting device of the present invention and the large surface emitting lighting device are used for the backlight of the liquid crystal display device, and in this case, the above-described effects can be obtained in the same manner.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art can make modifications and applications based on the description and well-known techniques. This is also the scope of the present invention, and is included in the scope for which protection is sought.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to manufacture easily the large sized surface emitting lighting fixture without the unevenness of light.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Organic EL light emitting element 12 Substrate 14 Light diffusion cover

Claims (3)

A large surface emitting lighting fixture configured by arranging a plurality of lighting fixtures on a plane, wherein the lighting fixture includes a plurality of planar light sources and a support member that supports the plurality of planar light sources. A lighting fixture comprising: at least one end surface of the planar light source and at least one end surface of the support member are substantially coplanar ;
A light diffusing panel disposed on the light emitting surface side of the planar light source so as to cover the plurality of planar light sources, the end surface of the light diffusing panel being substantially the same as the end surface of the planar light source and the support member; And a tapered surface is formed by cutting a corner of the planar light source,
A large surface-emitting luminaire in which the light diffusing panel includes a leg portion disposed on the support member, and the leg portion is disposed in a space created by the tapered surface . The large surface emitting lighting device according to claim 1,
A large-sized surface light-emitting luminaire in which a power feeding unit is disposed on a surface of the planar light source on the support member side. It is a large surface emitting lighting fixture according to claim 1 or 2 ,
The planar light source is a large surface emitting lighting fixture that is an organic EL light emitting element.

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