Liquid crystal display device and backlight

一种液晶显示装置、照明装置的技术，应用在照明系统的光导、仪器、平面/板状光导等方向，能够解决没有完全的解决对策等问题，达到防止显示质量恶化的效果

Active Publication Date: 2007-01-10
JAPAN DISPLAY INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various attempts have been made to reduce the brightness difference between LEDs when using multiple light-emitting diodes, but there is still no complete solution

Method used

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  • Liquid crystal display device and backlight
  • Liquid crystal display device and backlight
  • Liquid crystal display device and backlight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of the examples.

[0034] figure 1 It is a developed perspective view showing the overall structure of Embodiment 1 of the liquid crystal display device of the present invention for explaining it. In this liquid crystal display device, a reflective sheet 12 and a light guide plate 13 are arranged on a lower frame 11 formed of resin or metal, and furthermore, a lower diffusion sheet 141, a lower prism sheet 142, and an upper prism sheet are arranged on the light guide plate 13. 143, an optical sheet 14 composed of a plurality of parts such as an upper diffusion sheet 144. Furthermore, a light-shielding double-sided tape 15 and a liquid crystal display panel (also referred to as an LCD panel) 16 are arranged on the plurality of optical sheets 14 to constitute a liquid crystal display device. An upper frame for integrating these parts with the lower frame 11 is no...

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PUM

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Abstract

The invention provides a liquid crystal display apparatus capable of preventing the deterioration of a display quality by suppressing an in-plain luminance unevenness on a lighting surface caused by a positional deviation between LEDs when the LEDs of the minimum are arranged on an incident surface of a light guiding plate. An illumination device is composed of: the light guiding plate 13 formed of a transparent thin plate which makes a surface opposite to a liquid crystal display panel 16 a lighting surface region; point light sources which are mounted on a flexible printed circuit substrate 17 and are disposed on side surfaces of the light guiding plate; and an optical sheets 14 interposed between the light guiding plate and the liquid crystal display panel, wherein the side surfaces 131, 132 on which the point light sources of the light guiding plate are disposed form angular inclination surfaces as viewed from the lighting surface and the point light sources are disposed by making each of the angular inclination surfaces the incident surface. Further, at least one positioning pin 133 is formed so as to engage a positioning hole 171 of the flexible printed circuit substrate 17 and positioning holes 134 of the optical sheets 14 with the positioning pin 133.

Description

technical field [0001] The present invention relates to a liquid crystal display device and its illuminating device, and is applicable to the liquid crystal display device having the illuminating device. The illuminating device arranges a point light source composed of solid light-emitting elements such as light-emitting diodes as the illuminating light source of the liquid crystal display panel on the side of the light guide plate. Background technique [0002] In small information terminals such as mobile phones and PDAs, power-saving, small and lightweight liquid crystal display devices are widely used as display devices. Liquid crystal display devices, including liquid crystal display devices that utilize an external light source as an illumination means for visualizing an electronic latent image formed on a liquid crystal display panel, and liquid crystal display devices that provide an auxiliary illumination device on the back or front of a liquid crystal display panel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
CPCG02F1/133615G02B6/0018G02B6/0038G02B6/0083G02B6/009H05K1/189G02F1/13452G02F1/1333G02F1/1335
Inventor 高桥芳昭栗原正彦三船雅之利部宪
Owner JAPAN DISPLAY INC
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