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Illuminating checked board device for lighting body

A grille and reflector technology, applied in the field of lighting grille devices, can solve problems such as the reduction of LCD lighting efficiency

Inactive Publication Date: 2003-03-12
CITIZEN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a large incident angle will cause the reflection of the incident light, which will reduce the lighting efficiency of the LCD

Method used

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  • Illuminating checked board device for lighting body
  • Illuminating checked board device for lighting body
  • Illuminating checked board device for lighting body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] refer to figure 1 , the lighting grid device 1 of the present invention is used as the back light of the LCD. The lighting grid device 1 comprises a lighting grid 3, a light source 2 composed of LEDs placed as edge light against the end face of the lighting grid 3, a prism sheet 4 opposite the top surface of the lighting grid 3, and a light source 2 opposite to the lighting grid 3. The bottom surface of the grid plate 3 is opposite to the reflector plate 5 .

[0020] The lighting grid 3 has the same structure as the lighting grid 22 of FIG. 8 . In other words, the teeth of each sawtooth-shaped reflector bottom surface 22b have a triangular cross-section including a first hypotenuse at the light introduction end and a second hypotenuse after the first hypotenuse that is shorter than the first hypotenuse.

[0021] In the prism sheet 4, a plurality of prisms 4a are arranged in the longitudinal direction of the sheet at the light exit end. Each prism 4a expands in the la...

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PUM

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Abstract

A lighting panel device has a light source, a lighting panel receiving light from the light source at an end face, and a prism sheet provided above the lighting panel. The lighting panel has a bottom reflector face, and the prism sheet has a plurality of prisms arranged in a longitudinal direction of the prism sheet. Each of the prisms has a sectional shape of a triangle. A vertex of the triangle is between 30 DEG and 25 DEG .

Description

Background technique [0001] The present invention relates to an illuminated panel arrangement for illuminating broad surfaces such as liquid crystal displays. [0002] It is well known to use wide illuminated grid arrangements as front or back light for liquid crystal displays. The lighting grid device includes a light source, a lighting grid guiding light emitted from the light source at the end face of the board, and a prism sheet placed facing the lighting grid for radiating the light emitted from the lighting grid to the object. [0003] FIG. 7 is a side view showing a conventional illuminated grid arrangement for use as a back light for a liquid crystal display (hereinafter referred to as LCD). The lighting grid device 20 includes a light source 21 composed of light emitting diodes (LEDs), a lighting grid 22, a light diffusing sheet 23 opposed to the front surface of the lighting grid 22, a reflecting sheet 26, and a plurality of prisms 24a ( Prism sheet pair 24 and 25 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02F21V5/02F21V7/09F21V8/00F21V13/04F21Y101/02G02F1/13357G09F9/00
CPCF21V13/04F21V7/09F21V5/02G02F2001/133607G02B6/0053G02F1/133607
Inventor 宫下纯司
Owner CITIZEN ELECTRONICS CO LTD