JP2016021286A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which efficiently delivers a light emitted from a light-emitting surface of a surface light source to a wall.SOLUTION: The luminaire 10 is fixed to a mounting surface 20 at a surface opposite to a light emission surface 102 of the surface light source 100. The surface light source 100 emits light from the light emission surface 102. A light distribution filter 120 inclines the light emitted from the surface light source 100 in a first direction (to the right side in a direction of x-axis in Fig. 1). A reflection member 200 has the reflection surface 210. The reflection surface 210 is opposed to the light emission surface 102 of the surface light source 100, and is inclined in a direction separating from the surface light source 100 as proceeding in the first direction described above. Furthermore, the reflection surface 210 is curved in a direction in which it becomes concave. The reflection surface 210 reflects the light transmitted through the light distribution filter 120 toward the mounting surface 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting device.

  In recent years, lighting devices using organic EL elements have been used. In the organic EL element, an organic layer including a light emitting layer is disposed between two electrodes. In Patent Document 1, in a lighting device having an EL light emitter, a light collecting member or a light distribution member is arranged on the EL light emitter to orient the light from the EL light emitter in a desired direction. Have been described.

JP 2009-252569 A

  One lighting device is indirect lighting. Indirect illumination irradiates light from the illumination device onto a wall or the like to which the illumination device is attached, and uses the reflected light. A surface light source is generally attached to a wall or the like on the surface opposite to the light emitting surface. For this reason, it was difficult to efficiently irradiate the wall with light emitted from the light emitting surface of the surface light source.

  An example of a problem to be solved by the present invention is to efficiently irradiate a wall with light emitted from a light emitting surface of a surface light source.

The invention according to claim 1 is a surface light source that emits light from a light exit surface;
A light distribution unit that inclines light from the surface light source in a first direction;
A reflective surface that faces the light exit surface and is inclined so that the first direction side is away from the surface light source;
With
The reflection surface is a lighting device that is curved in a concave direction with respect to the light exit surface.

The invention according to claim 9 is an illumination device attached to the attachment surface,
A surface light source that emits light from the light exit surface;
A light distribution unit that inclines light from the surface light source in a first direction;
A reflective member that faces the light exit surface and reflects the light transmitted through the light distribution portion toward the mounting surface;
It is an illuminating device provided with.

It is a figure which shows the structure of the illuminating device which concerns on embodiment. It is a figure which shows the structure of the illuminating device which concerns on a modification. It is a figure which shows the structure of the illuminating device which concerns on Example 1. FIG. It is a figure which shows the structure of the illuminating device which concerns on Example 2. FIG. It is a figure which shows the structure of the illuminating device which concerns on the modification of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  FIG. 1 is a diagram illustrating a configuration of a lighting device 10 according to the embodiment. The illumination device 10 includes a surface light source 100, a light distribution filter 120 (light distribution unit), and a reflection member 200. In the illumination device 10, the surface opposite to the light exit surface 102 of the surface light source 100 is fixed to an attachment surface 20 such as a wall. The surface light source 100 emits light from the light exit surface 102. The light distribution filter 120 tilts the light emitted from the surface light source 100 in the first direction (the right side in the x-axis direction in FIG. 1), that is, the direction in which the light exits the illumination device 10. The reflective member 200 has a reflective surface 210. The reflective surface 210 faces the light exit surface 102 of the surface light source 100 and is inclined so that the first direction side is away from the surface light source 100. For example, the reflective surface 210 is inclined in a direction away from the surface light source 100 as it proceeds in the first direction. Furthermore, the reflective surface 210 is curved in a concave direction. The reflection surface 210 reflects the light transmitted through the light distribution filter 120 toward the mounting surface 20. Details will be described below.

  The surface light source 100 has a configuration in which, for example, an organic EL element is formed on a substrate, and the organic EL element is sealed with a sealing member. The surface light source 100 may have one or more organic EL elements. In the latter case, these organic EL elements may be electrically connected in parallel to each other or may be electrically independent of each other.

  The substrate is a transparent substrate such as a glass substrate or a resin substrate, and has a polygonal shape such as a rectangle. The substrate may or may not have flexibility.

  The organic EL element has a configuration in which a first electrode, an organic layer, and a second electrode are stacked in this order on a substrate.

  The first electrode is a transparent electrode having optical transparency. The light emitted from the organic EL element is emitted to the outside through the first electrode and the substrate. The material of the transparent electrode includes, for example, an inorganic material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), or a conductive polymer such as a polythiophene derivative.

  The organic layer has a configuration in which a plurality of layers including a light emitting layer are stacked. At least one layer (for example, hole injection layer) constituting the organic layer may be formed using a coating material. As for an organic layer, all the layers may be formed using the coating material.

  The second electrode includes a metal layer made of a metal selected from the first group consisting of Al, Au, Ag, Pt, Sn, Zn, and In, or an alloy of a metal selected from the first group. It is out.

  In such a configuration, the light emission surface 102 of the surface light source 100 is a surface on the opposite side of the surface of the substrate on which the organic EL element is formed. However, when the first electrode is formed of a metal layer and the second electrode is a transparent electrode, the light emission surface 102 of the surface light source 100 is the surface of the substrate on which the organic EL element is formed.

  A condensing filter 110 and a light distribution filter 120 are arranged in this order on the light exit surface 102 of the surface light source 100. The condensing filter 110 condenses the light emitted from the light exit surface 102 and aligns the emission direction thereof. The light emission direction after passing through the condensing filter 110 is, for example, a direction perpendicular to the light exit surface 102. The light distribution filter 120 bends the traveling direction of the light transmitted through the condensing filter 110 in a predetermined direction. The condensing filter 110 has a plurality of regions that function as lenses, for example. The light distribution filter 120 has a plurality of regions that function as prisms.

  A surface of the reflecting member 200 that faces the surface light source 100 is a reflecting surface 210. The reflective surface 210 is formed by evaporating a metal such as silver on the base material of the reflective member 200, for example. The base material of the reflecting member 200 is formed using, for example, an organic material or an inorganic material. Moreover, although the shape of this base material is plate shape, for example, you may have another shape.

  The reflective surface 210 is curved in a direction that is concave with respect to the light exit surface 102. In other words, the reflecting surface 210 is a concave mirror. In the example shown in the figure, the reflection surface 210 is smoothly curved. For this reason, the tangent S1 of the reflective surface 210 at the end portion on the first direction side of the reflective surface 210 (right end portion in the figure: hereinafter referred to as the first end portion 212) does not intersect the plane including the reflective surface 210. (That is, parallel to the reflective surface 210), or more than the tangent S2 of the reflective surface 210 at the end opposite to the first end 212 (hereinafter referred to as the second end 214). Intersect at a small angle with respect to the plane containing.

  The reflection surface 210 reflects the light bent by the light distribution filter 120. The light reflected by the reflecting surface 210 is emitted to the outside of the lighting device 10. As described above, the reflecting surface 210 is a concave mirror. For this reason, the light reflected by the reflective surface 210 travels toward the mounting surface 20 in a direction perpendicular to the surface light source 100 (the y direction in FIG. 1). Further, in a direction parallel to the surface light source 100 (x direction in FIG. 1), the process proceeds toward the outside of the surface light source 100. For this reason, the light radiated | emitted from the light-projection surface 102 is irradiated to the attachment surface 20 efficiently. For example, in the example shown in FIG. 1, the light emitted from the portion of the surface light source 100 that is located near the first end portion 212 in the x direction irradiates the portion of the mounting surface 20 that is located near the surface light source 100. Is done. On the other hand, light emitted from a portion of the surface light source 100 that is located on the opposite side of the first end 212 in the x direction is irradiated to a portion of the mounting surface 20 that is away from the surface light source 100.

  Here, when the reflecting surface 210 of the reflecting member 200 is projected onto a plane including the light emitting surface 102, the end of the reflecting surface 210 in the first direction (the right side in FIG. 1) does not overlap the surface light source 100. It extends to. By doing in this way, the light emitted from the end portion of the light emitting surface 102 in the first direction is also reflected by the reflecting surface 210 and taken out to the outside of the lighting device 10. Further, in the above projected image, the reflection surface 210 covers the entire surface of the light emission surface 102. In this way, most of the light emitted from the light exit surface 102 can be reflected by the reflection surface 210 and taken out of the illumination device 10. However, the light emitted from the light exit surface 102 by the light distribution filter 120 bends in the first direction (right side in FIG. 1). For this reason, the reflective surface 210 does not need to cover the edge part (left edge part of FIG. 1) of the light-projection surface 102 on the opposite side to the 1st direction.

  As described above, according to the present embodiment, the light emitted from the light emission surface 102 of the surface light source 100 is bent by the light distribution filter 120 and then reflected by the reflection surface 210. The reflecting surface 210 is a concave mirror. For this reason, the light radiated | emitted from the light-projection surface 102 is irradiated to the attachment surface 20 efficiently.

(Modification)
FIG. 2 is a diagram illustrating a configuration of the illumination device 10 according to the modification. The illuminating device 10 according to this modification has the same configuration as the illuminating device 10 according to the embodiment except that the reflecting surface 210 is discontinuously curved. Specifically, the reflective surface 210 has at least one discontinuous point. At the discontinuous points, the reflection surface 210 is bent in a direction parallel to the light exit surface 102. Note that the surface of the reflecting surface 210 other than the discontinuous points may be a flat surface or a concave surface.

  Also according to this modification, the light emitted from the light emission surface 102 can be efficiently irradiated onto the mounting surface 20 as in the embodiment.

Example 1
FIG. 3 is a diagram illustrating the configuration of the illumination device 10 according to the first embodiment. In the present embodiment, the surface light source 100 and the reflecting member 200 are held by the mounting member 300.

  The attachment member 300 has a shape obtained by removing one surface of a rectangular parallelepiped or a shape obtained by removing one of the end surfaces of the cylinder. The opening formed by removing the surface is a light exit. Moreover, the edge part of the surface light source 100 and the edge part of the reflection member 200 are being fixed to the surface facing the light emission opening among the inner surfaces of the attachment member 300. The configurations of the surface light source 100 and the reflecting member 200 are as described in the embodiment or its modification.

  Also according to the present example, similarly to the embodiment, the light emitted from the light emitting surface 102 can be efficiently irradiated onto the mounting surface 20.

(Example 2)
FIG. 4 is a diagram illustrating a configuration of the illumination device 10 according to the second embodiment. In the present embodiment, the relative position of the reflecting member 200 with respect to the surface light source 100 is fixed using the mounting member 310. Specifically, the attachment member 310 is a plate-like member, and is fixed to a surface of the surface light source 100 opposite to the light emitting surface 102. An end of the mounting member 310 opposite to the first direction (the left end in FIG. 3) extends outside the surface light source 100. The reflecting member 200 is fixed to a portion of the mounting member 310 that extends to the outside of the surface light source 100.

  Also according to the present example, similarly to the embodiment, the light emitted from the light emitting surface 102 can be efficiently irradiated onto the mounting surface 20. Further, the illumination device 10 can be made smaller than the first embodiment.

  In addition, as shown in FIG. 5, you may form the reflection member 200 and the attachment member 310 integrally. For example, the attachment member 310 and the reflection member 200 may be formed by bending or pressing a metal plate. If it does in this way, the manufacturing cost of the attachment member 310 and the reflection member 200 can be made low.

  As mentioned above, although embodiment and the Example were described with reference to drawings, these are illustrations of this invention and can also employ | adopt various structures other than the above.

DESCRIPTION OF SYMBOLS 10 Illuminating device 100 Surface light source 102 Light emission surface 120 Light distribution filter 200 Reflective member 210 Reflective surface 300 Mounting member 310 Mounting member

Claims (9)

A surface light source that emits light from the light exit surface;
A light distribution unit that inclines light from the surface light source in a first direction;
A reflective surface that faces the light exit surface and is inclined so that the first direction side is away from the surface light source;
With
The said reflecting surface is the illuminating device curved in the direction which becomes concave with respect to the said light-projection surface. The lighting device according to claim 1.
The reflective surface approaches a second end portion that is an end portion on the opposite side of the reflective surface from a first end portion that is an end portion on the first direction side of the reflective surface. A lighting device that is smoothly curved. The lighting device according to claim 2,
The tangent of the reflective surface at the first end does not intersect the plane including the surface light source, or intersects the plane at a smaller angle than the tangent of the reflective surface at the second end. . The lighting device according to claim 1.
The reflective surface approaches a second end portion that is an end portion on the opposite side of the reflective surface from a first end portion that is an end portion on the first direction side of the reflective surface. The lighting device curved in a discontinuous manner. The lighting device according to claim 3.
When the reflective surface is projected onto the plane, the end of the reflective surface on the first direction side extends to a region that does not overlap the surface light source. The lighting device according to claim 5.
The illumination device that covers the entire surface of the light emission surface when the reflection surface is projected onto the plane. The lighting device according to claim 6.
An attachment member attached to a surface of the surface light source opposite to the light emitting surface, and extending from the end of the surface light source opposite to the first direction to the outside of the surface light source; ,
With
An end of the reflection member is fixed to a portion of the mounting member that extends to the outside of the surface light source. The lighting device according to claim 7.
The lighting device, wherein the reflecting member is formed integrally with the mounting member. A lighting device attached to a mounting surface,
A surface light source that emits light from the light exit surface;
A light distribution unit that inclines light from the surface light source in a first direction;
A reflective member that faces the light exit surface and reflects the light transmitted through the light distribution portion toward the mounting surface;
A lighting device comprising:

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