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Luminous Panel for display device

A light-emitting panel and display technology, applied to the light guide, instrument, optics, etc. of the lighting system, can solve the problems of reducing the quality of the light-emitting panel 12, LCD cannot be illuminated uniformly, and increasing manufacturing costs

Inactive Publication Date: 2003-09-24
CITIZEN ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the LCD cannot be illuminated evenly
[0007] Moreover, since a strong light intensity is required in a region close to the edge light, it is necessary to arrange the prisms 12b in high density, which increases the manufacturing cost and reduces the quality of the light-emitting panel 12.

Method used

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  • Luminous Panel for display device
  • Luminous Panel for display device
  • Luminous Panel for display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] refer to figure 1 and 2 , the light-emitting panel 2 made of transparent plastic is rectangular in top view and beveled at one corner to form a flat incident surface 2a. The edge light 1 of LED is installed at the place corresponding to the incident surface 2a. A plurality of prisms 2 b are circularly formed on the lower side of the light emitting panel 2 . As a reflector surface, each prism projects inwardly. The side line of the prism 2b is formed concentrically with the light-emitting point of the side light 1, such as figure 1 shown. Each prism 2b has a saw-toothed cross-section, and has the same apex angle θ, which includes a first inclination angle θ1 (θ1. The second inclination angle θ2. The angle θ1 of the first inclination angle (θ1.1~θ1.n) θ1 is 89.5°~60°, and the inclination angle θ1 is set so that it increases from the edge light 1 to the far end. That is, the angle changes from θ1.1 at the position near the edge light 1 through θ1.m to θ1.n near the ...

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PUM

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Abstract

A luminous panel is provided, both surfaces of which are rectangular, one of which is a reflective surface and the other is a luminous surface, and an edge light is installed at one corner of the luminous panel. A plurality of prisms are circularly arranged on the reflective surface of the light emitting panel. Each prism has an apex angle θ including a first inclination angle θ1 on the edge light side and a second inclination angle θ2 opposite the first inclination angle θ1. The first inclination angle θ1 is set to 89.5°~60°, and there is the following relationship between the first inclination angle θ1 and the second inclination angle θ2: θ1(θ1.1~θ1.n)>θ2; θ1.1≤θ1.2≤ ··θ1.(m-1)≤θ1.m··θ1.(n-1)≤θ1.n

Description

technical background [0001] The invention relates to a light-emitting panel for a display such as a liquid crystal display (LCD), which serves as a backlight to illuminate the display from its underside. [0002] FIG. 10 is a top view showing a conventional light emitting panel, and FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10 . [0003] In a top view, the luminous panel 12 made of transparent plastic has a rectangular shape with an incident surface beveled at one corner. The side lights 11 of LEDs (light emitting diodes) are arranged corresponding to the corners 12a. On the lower side of the light emitting panel 12 are formed a plurality of prisms 12b as components of reflectors. The prism 12b is concentric with the 11 light-emitting points of the edge light, as shown in FIG. 11 . The prism 12b has an apex angle of 90°. [0004] Light emitted from the edge light 11 enters the light emitting panel 12 . The light in the light emitting panel 12 is ref...

Claims

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Application Information

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IPC IPC(8): G02B6/00F21V8/00F21Y101/00G02B5/02G02F1/1335G02F1/13357
CPCG02B6/0038
Inventor 宮下純司松本健志
Owner CITIZEN ELECTRONICS CO LTD