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Backlight source and liquid crystal display device

A liquid crystal display device and backlight technology, which is applied in the field of backlight, can solve the problems of insufficient brightness and uneven brightness of surface light sources, and achieve the effect of uniform brightness

Inactive Publication Date: 2004-06-16
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects of uneven luminance and insufficient luminance of surface light sources in the background technology, the present invention provides a backlight with uniform luminance distribution

Method used

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  • Backlight source and liquid crystal display device
  • Backlight source and liquid crystal display device
  • Backlight source and liquid crystal display device

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Experimental program
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no. 1 approach

[0018] please see image 3 , the first embodiment of the backlight of the present invention, the backlight 20 includes a plurality of light emitting diodes 21 and a light guide plate 22, a plurality of microlenses 23 are arranged between the light emitting diodes 21 and the light guide plate 22, and the plurality of The light-emitting diodes 21 and the light guide plate 22 are respectively positioned within the working distance of the left and right sides of the plurality of microlenses 23 (described later), so that the microlenses 23 couple the divergent light emitted by the plurality of light-emitting diodes 21 into uniform parallel light incident into the light guide plate 22.

[0019] The light guide plate 22 is roughly a cuboid plate entity, which includes a light incident surface 221 adjacent to the microlens 23, a light exit surface 222 perpendicular to the incident surface 221, a bottom surface 223, a first side (not shown), and a second One side is opposite to the se...

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PUM

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Abstract

A backlight source for liquid crystal display device, comprising a plurality of light-emitting diodes, a light conducting board and a plurality of microlens, the light conducting board includes a plane of light incidence opposite the multiple light-emitting diodes, the multiple microlens are arranged between the multiple light-emitting diodes and the incidence plane, and the multiple light-emitting diodes and the light conducting board are positioned within the working distance on the two sides of the microlens.

Description

【Technical field】 [0001] The invention relates to a uniformly luminous backlight source and a liquid crystal display device using the backlight source as a surface light source. 【Background technique】 [0002] At this stage, liquid crystal displays are widely used in notebook computers, desktop computer monitors, workstations, industrial monitors, global satellite positioning systems ( GPS), personal data processing, game consoles, videophones, portable VCDs, DVDs and other portable devices. However, the liquid crystal itself does not emit light, and a backlight source is required to provide it with the brightness required for displaying images. Moreover, the liquid crystal display panel is composed of a plurality of liquid crystal units, and each liquid crystal unit has the same requirement for obtaining bright light, so the backlight source must be a surface light source with uniform distribution of luminance. Generally, there are two types of light sources in the backli...

Claims

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Application Information

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IPC IPC(8): F21V5/00G02B5/02G02F1/13357G09F9/35
Inventor 余泰成吕昌岳陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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