JP3098844B2 - Surface emitting light source - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface emitting light source utilizing changes in brightness and light color.

[0002]

2. Description of the Related Art Conventionally, a light source for illumination has been indispensable in daily life, and its primary purpose is to make it brighter, so that the appearance of colors (color rendering) has been neglected. However, with the diversification of people's lives, the development of fluorescent lamps that take into account the color and brightness of lighting has become important, and three-wavelength fluorescent lamps that are bright and have faithful colors have been commercialized. ing. In recent years, in order to live a more comfortable life, lighting that changes in light color and brightness according to the environment, fluorescent lamps that are easy on the human eye corresponding to the aging society in the near future, and the sensitivity of people Lighting that creates a psychologically and mentally calm atmosphere is also being developed.

FIG. 3 is a configuration diagram of a conventional surface emitting light source.
As shown in FIG. 3, the conventional surface-emitting light source emits a plurality of light-emitting tubes 11 coated with a monochromatic phosphor, and the light emitted therefrom is diffused by a diffusion plate 12 to perform color mixing. in this case,
When the distance between the arc tube 11 and the diffusion plate 12 was sufficiently long, some color mixture was obtained.

[0004]

However, in the above-described conventional configuration, a large number of small arc tubes are combined,
If the distance between the arc tube and the diffusion plate is increased, mixing and mixing of light can be performed to some extent, but it is not large enough for general household use because many circuits are required and the lighting equipment itself becomes large. There was a problem that equipment was required.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a surface-emitting light source which is small and can emit light of a mixed color uniformly over a wide area.

[0006]

To achieve this object, a surface emitting light source according to the present invention comprises a plurality of monochromatic light sources having different emission colors.
A light tube, and a reflection provided to cover the plurality of light emitting tubes.
A plate, and light emitted from the plurality of arc tubes is introduced from the side.
A light guide plate that diverges from the main surface portion.
The thickness is smaller than the thickness of the plurality of arc tubes stacked,
The opening diameter of the opening of the reflection plate abutting on the side surface of the light guide plate
Is a portion of the reflector that covers the plurality of arc tubes.
It has a configuration smaller than the maximum inner diameter .

[0007]

According to this structure, the light from the arc tube is reflected by the reflector and enters the side surface of the light guide plate, so that the light is diffused inside the light guide plate, mixed in color, and light of uniform color mixture can be provided. . Therefore, by using a fluorescent lamp whose illumination color and brightness change, a uniform surface emitting light source whose color and brightness changes can be obtained.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a surface emitting light source according to an embodiment of the present invention. In FIG. 1, 1 is a red arc tube, 2 is a green arc tube, 3 is a blue arc tube, 4 is an arc tube 1,
Each of the arc tubes 1,
Diffusion plate 5 with light from 2 and 3 on one side of transparent plate
It leads to the side of. The light source unit 6 is constituted by the arc tubes 1, 2, 3 and the reflector 4.

FIG. 2 is a top view of the surface light source of FIG. Light source units 6 in which the arc tubes 1, 2, 3 and the reflection plate 2 are combined are installed on four sides of the diffusion plate 5. With this configuration, light diverging from each of the arc tubes 1, 2, and 3 is reflected by the reflector 4 and collected on the side surface of the diffuser 5. The light that has entered the inside of the diffusion plate 5 is diffused on the surface that has been subjected to milky white processing, and as a result, mixed light is obtained.

In this embodiment, an example is described in which the arc tubes 1, 2, and 3 coated with phosphors of three colors of red, green, and blue are used, but phosphors of three colors of red, yellow, and blue are used. The same uniform color mixing effect can be obtained in the case of using an arc tube coated with, or in the case of a light bulb color, daylight color, or white fluorescent light.

In this embodiment, the light source unit 6
Are described in all four directions of the side surface of the diffusion plate 5, but light mixing and color mixing are possible even if they are installed in only one side surface or in two directions of adjacent or opposite side surfaces.

[0012]

As described above, according to the present invention, since the light emitted from the light source is introduced into the side surface of the light guide plate by the reflection plate, a uniform light emission surface can be obtained, and the visibility is generally reduced. An excellent surface emitting light source capable of obtaining a sufficient light color for illumination can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a surface emitting light source according to an embodiment of the present invention.

FIG. 2 is a top view of the same surface light source.

FIG. 3 is a configuration diagram of a conventional surface emitting light source.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Red arc tube 2 Green arc tube 3 Blue arc tube 4 Reflector 5 Diffusion plate (light guide plate)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-48586 (JP, A) JP-A-60-249202 (JP, A) JP-A-3-12202 (JP, U) JP-A 27506 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 4/00 F21S 8/04 H05B 37/02

Claims (1)

(57) [Claims] 1. A plurality of monochromatic arc tubes having different emission colors,
A reflector provided to cover the plurality of arc tubes;
Light emitted from multiple arc tubes is introduced from the side and the main surface
A light guide plate diverging from the light guide plate, the thickness of the light guide plate is
The side of the light guide plate, which is thinner than the thickness in which a plurality of arc tubes are stacked.
The opening diameter of the opening of the reflection plate in contact with the surface is
From the maximum inner diameter of the part of the reflector that covers the number of arc tubes
Surface emitting light source , characterized in that the surface emitting light source is small . "