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Light guide panel comprising wedge type rear prism for back light unit of tft-lcd

A technology of light guide panel and prism, which is applied in the directions of light guide, prism, optical element, etc., can solve the problems of increasing the overall thickness of the backlight unit, increasing the manufacturing cost, and decreasing the competitiveness, and achieves good viewing angle characteristics, distribution optimization, and low manufacturing cost. Effect

Inactive Publication Date: 2009-11-18
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these films lead to an increase in the overall thickness of the backlight unit and an increase in manufacturing costs, thereby deteriorating the competitiveness of LCD products employing such films

Method used

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  • Light guide panel comprising wedge type rear prism for back light unit of tft-lcd
  • Light guide panel comprising wedge type rear prism for back light unit of tft-lcd
  • Light guide panel comprising wedge type rear prism for back light unit of tft-lcd

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Embodiment Construction

[0019] figure 1 is a perspective view of a light guide panel for an LCD backlight unit according to one embodiment of the present invention.

[0020] see figure 1 , the light guide panel 30 for an LCD backlight unit according to an embodiment of the present invention is generally made of a transparent acrylic material which has high strength, is not easily broken or deformed, is lightweight, and exhibits high transmittance to visible light. The light guide panel 30 includes a main body 300 , a front prism 210 and a dot prism 320 .

[0021] The body 300 includes a side 301 for receiving incident light, a front 303 connected to the side 301 and facing an LCD panel (not shown), and a rear 305 connected to the side 301 and facing the front 303 .

[0022] The term "side 301" lexically refers to the side of an object, but is defined here as the surface through which light emitted from the light source 306 enters the light guide panel. exist figure 1 Herein, the side 301 refers t...

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PUM

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Abstract

Disclosed herein is a light guide panel for an LCD backlight unit. The light guide panel includes a main body having a lateral side for receiving incident light, and a front side for emitting light, and a rear side. The rear side is formed with wedge type rear prisms with a predetermined radius of curvature. The rear prisms are formed on an interior surface that is patterned in a predetermined plane shape on the rear side. The light guide panel has improved brightness and viewing angle characteristics, and satisfies optical characteristics complying with the TCO '03 standard.

Description

technical field [0001] The present invention relates to a light guide panel for a backlight unit of a liquid crystal display. Background technique [0002] Since a liquid crystal display (LCD) is not an emitting device, it must be provided with a backlight unit as a light emitting source. In this way, by adjusting the amount of transmission of light emitted from the backlight unit, images and the like are displayed on the liquid crystal panel having liquid crystals arranged in a predetermined pattern. [0003] LCDs may be classified into a twisted nematic (TN) type and an in-plane switching (IPS) type according to the arrangement of liquid crystals. The viewing angle of TN-type LCD is worse than that of IPS-type LCD. However, TN-type LCDs are suitable for LCDs requiring forward visibility due to their excellent transmittance. On the other hand, although IPS-type LCDs have an excellent viewing angle compared to TN-type LCDs, they have lower transmittance, which reduces ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00
CPCG02B6/0038G02B6/0036G02B6/0061G02B6/00G02B5/02G02B5/04G02F1/1335
Inventor 池哲求周成炫郑伍溶李星勋
Owner CHEIL IND INC
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