JP2008218140A - Reflecting plate and surface light emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reflecting plate and a surface light emitting device with reflection efficiency enhanced. <P>SOLUTION: The plane light-emitting device 1 includes an LED array 5 with LED elements 3 arrayed, and a reflecting plate 7 reflecting light irradiated from the LED array 5 in a direction of light extraction. The reflecting plate 7 includes a reflecting plate body with beads printing applied, and reflective dots printed on a reflecting plate body. With this, the reflecting plate 7 of the plane light-emitting device 1 can reflect light with the use of both the reflecting plate body with beads printing applied and the reflecting dots, and thereby, reflecting efficiency of light irradiated at the reflecting plate 7 can be enhanced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reflector and a surface light emitting device.

  Conventionally, as a surface emitting device used as a backlight of a liquid crystal monitor or the like, there is a device described in Patent Document 1.

JP 2004-171871 A

  However, in such an apparatus, the light applied to the reflecting surface is reflected depending only on the optical reflectance of the material constituting the reflecting surface. And when reflecting light depending on only the reflectance of the material which comprises a reflective surface in this way, there existed a problem that sufficient reflection efficiency could not be obtained.

  Therefore, the present invention has been made in view of such a situation, and an object thereof is to provide a reflector and a surface light emitting device capable of increasing the reflection efficiency.

In order to solve the above problems, a reflector according to the present invention includes a reflector with bead printing,
And a reflective dot printed on the reflective plate.

  According to this configuration, the reflecting plate can reflect light by both the reflecting plate body on which the bead printing is performed and the reflecting dots. And thereby, the reflection efficiency of the light irradiated to the reflecting plate can be improved.

  In this case, it is preferable that the reflective dots are milky half color.

  According to this configuration, it is possible to further improve the reflection efficiency of the reflector due to the light storage effect of milk half color.

The surface light-emitting device according to the present invention includes an LED array in which LED elements are arranged, and a reflector that reflects light emitted from the LED array in a light extraction direction.
It has a reflective plate on which bead printing has been performed, and reflective dots printed on the reflective plate.

  According to this configuration, the reflecting plate can reflect light by both the reflecting plate body on which the bead printing is performed and the reflecting dots. And thereby, the reflection efficiency of the light irradiated to the reflecting plate can be improved.

  Thus, according to the present invention, it is possible to increase the reflection efficiency by the reflector.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, the surface light emitting device 1 reflects an LED array 5 in which LED (Light Emitting Diode) elements 3 are arranged and light emitted from the LED array 5 in the light extraction direction of the surface light emitting device. And a reflector 7. In the surface light emitting device 1, these members are housed in a housing 9 having a hollow inside.

  The LED array 5 is formed by arranging a plurality of LED elements 3 and emits light based on electric power supplied from a power source (not shown). Such an LED array 5 is fixed to the inner wall of the housing 9, and the LED array 5 emits light toward the hollow portion of the housing 9.

  The reflector 7 reflects the light emitted from the LED array 5 in the light extraction direction of the surface light emitting device 1. The surface of the reflection plate 7 is formed by bead printing with glass beads. And the light inject | emitted from the LED array 5 can be efficiently reflected by forming the reflecting plate 7 by bead printing. In addition, since the light reflected by the reflecting plate 7 is diffusely reflected by the beads, the surface light emitting device 1 can uniformly diffuse the light reflected from the reflecting plate 7 into the surface light emitting device 1. .

  The reflection plate 7 is formed by forming reflection dots 11 on the surface of a reflection plate body on which bead printing has been performed. The reflective dots 11 are printed on the reflective plate by, for example, screen printing. And such a reflective dot 11 is formed in the milk half color. By forming the reflective dots 11 in a milky-half color, the reflector 7 can reflect efficiently.

  As described above, according to the surface light emitting device 1, the reflection efficiency of the light emitted from the LED array 5 by the reflection plate 7 and the reflection dots 11 can be improved.

1 is a perspective view of a surface light emitting device according to an embodiment of the present invention. It is sectional drawing of the same surface light-emitting device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface emitting device 3 LED element 5 LED array 7 Reflecting plate 9 Case 11 Reflecting dot

Claims (3)

A reflector plate with bead printing;
A reflective dot printed on the reflective plate;
A reflector characterized by. The reflective dot is a half-colored milk;
The reflector according to claim 1. An LED array in which LED elements are arranged;
A reflector that reflects the light emitted from the LED array in the light extraction direction;
The reflector is
A reflector plate with bead printing;
Having reflective dots printed on the reflector;
A surface light emitting device characterized by the above.