JPS62254179A - Surface light emitting panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface light emitter using an edge light, and is particularly suitable for a surface light emitter having a wide range.

Conventional edge light surface light emitters have a roughened or substantially V-shaped light emitting surface on a single thick transparent plate in order to increase the amount of light received. However, the luminous flux emitted from the light source declines as it moves away from the light source, and if the number of light emitting surfaces is increased, the luminous flux will decrease further, resulting in uneven brightness. Therefore, the field of use was limited.

The present invention solves these conventional problems and provides a surface emitting panel that can provide a wide bright uniform brightness surface using a single light source.

That is, each light-transmitting plate has a shape in which the degree of decay of the luminous flux is extremely low and is provided with light-emitting surfaces at predetermined intervals, and when stacked, the light-emitting surfaces intersect, and when combined, they form a square shape, a rhombus shape, or other uniform shape.

This provides a surface configuration that provides uniform brightness, and by further stacking layers, catadioptric refraction is amplified and brightness is improved.

Furthermore, a light transmitting plate coated with a layer of material having a lower refractive index than the core material of a transparent material has extremely low decline in luminous flux because the luminous flux from the light source is totally reflected or the reflection efficiency is high.

In addition, a light-transmitting plate coated with a substance corresponding to a diffusion layer on the surface emitting side amplifies light diffusion efficiency, making it possible to obtain a surface light emitting body that is bright over a wider area and has uniform brightness.

The present invention will be described below based on drawings showing embodiments.

On one side of a plurality of thin transparent plates 1-A, 1-B, and 1-C, capillary grooves are formed at predetermined intervals with extremely low decay of the luminous flux, 1-A is a vertical axis, and 1-B is a horizontal axis. The capillary grooves 1-C and 1-C form a light-emitting surface. 1-A.

When 1-B and 1-C are sequentially laminated, the light-emitting surfaces of 1-A and 1-B intersect, forming a continuous grid-like constant shape.

1-C is a thin recessed hole arranged at a position corresponding to the center of the constant shape. The light-emitting surface of each light-transmitting plate composed of these three layers has a surface configuration that provides uniform brightness.

The light beams generated by the light source 5 provided at the end face are repeatedly internally reflected, diffusely reflected, and refracted on each light emitting surface, and the mutual interference effect of light occurs to improve the brightness.

Furthermore, if the surface light emitter has one surface, a reflective layer may be provided on the opposite surface, and if it has both surfaces, a reflective layer may be provided at the center thereof to further improve the effect.

Hereinafter, data obtained by applying the present invention to the above-mentioned surface emitting panel will be briefly explained.

In FIG. 2, light-emitting surfaces 1-A, 1-B, and 1-C are provided using transparent acrylic resin plates with a thickness of 5 mm and a size (W) of 320 mm x (H) of 650 rran. A light source 5 (fluorescent lamp SW) is provided on the lower end surface, a dairy cow board 6 is provided on the surface emitting side of the laminated transparent plate, and a reflective plate 7 (bone white acrylic) is provided on the opposite side. be.

The brightness surface of fluorescent screens 1-A, 1-B, and 1-C laminated in two layers and rearranged was (H) 3 oomm, and in the case of three layers, it was (H) 430 mm.

FIG. 3 shows two transparent plates 2 each made of a 5 mm thick transparent acrylic resin plate coated with a low refractive index material layer on both sides.
The light emitting surfaces of A, 2-B, and 2-C were set as described above.As a result, in the case of two layers, (H) was 380 mm, and in the case of three layers, (H) was 550 mm.

Figure 4 shows each transparent plate 3, which is a transparent acrylic resin plate with a thickness of 5 mm coated with a layer of a material with a low refractive index having a different composition, and the surface light emitter side is coated with a diffusion layer material that increases diffusion efficiency. . The light emitting surfaces of 3-A, 3-B, and 3-C are set as described above.
In the case of 60 mm and 3 layers, uniform brightness was obtained throughout.

Figure 5 shows a case where light-emitting surfaces A, B, and C are provided on the same surface of a single transparent plate 4 made of a transparent acrylic resin plate with a plate thickness of 15 mm (
H) It was 150 mm.

It has been proven that by increasing the number of laminated surfaces as in the above embodiments, it is possible to improve the brightness, expand the brightness area, and obtain a uniform brightness surface.

In addition, it has been proven that a light-transmitting plate coated with a material having a low refractive index and corresponding to a diffusion layer exhibits even more excellent effects.

Therefore, if the luminous flux of the light source is increased, a bright uniform brightness surface can be obtained over a wider area.

As described above, the present invention provides a wide range of surface illuminants, so it can be used not only for display bodies such as indoor and outdoor signboards, information boards, and signs, but also for indoor decoration, ornaments, accessories, partitions, etc. as indirect lighting bodies. It can be effectively used in show windows, light boxes, various displays, etc.

Furthermore, if mass production with a special coating is possible, the structure is extremely simple and suitable for mass production.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of the present invention. 2, 3, 4, and 5 are cross-sectional views showing embodiments of the present invention. (S) is a thin transparent plate C) is a transparent plate coated with a layer of low refractive index material on both sides (3) is a transparent plate coated with a low refractive index material of a different composition on one side as a diffusion layer Plate (4) is a thick transparent plate (5) is a light source (
6) is the dairy plate (7) is the reflective plate The capillary groove on the vertical axis, ■
C) is a capillary groove on the horizontal axis. C) is a narrow pore.

Claims (2)

[Claims] (1) A plurality of light-transmitting plates made of a transparent material with excellent light transmittance are provided with a light-emitting surface consisting of capillary grooves or fine holes at predetermined intervals on one or both sides, and the respective light-transmitting plates are combined and laminated. A laminated light transmitting plate (panel) composed of at least two layers becomes a surface light emitting body with excellent light diffusion efficiency. A surface emitting panel characterized in that by increasing the number of laminated surfaces of transparent plates, it is possible to improve brightness, expand the brightness area, and obtain a uniform brightness surface. (2) A surface light emitting device according to claim 1, which uses a transparent plate having a core material made of a transparent material with excellent light transmittance and coated on one or both sides with a layer of material having a refractive index lower than that of the transparent material. panel.