Side-light type back light

A backlight and side-light technology, applied in optics, nonlinear optics, lighting devices, etc., can solve the problems of reducing backlight brightness and light intensity attenuation, and achieve the goal of increasing brightness, reducing light intensity attenuation, and improving utilization. Effect

Inactive Publication Date: 2009-09-09
BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are at least the following defects in the above-mentioned prior art: the light passing through the light guide plate can only be output after multiple refractions, and the light intensity of the output light is attenuated to a certain extent, reducing the brightness of the backlight source

Method used

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Embodiment Construction

[0015] Brightness is an important parameter in the performance of the backlight. Only a high-brightness backlight can make the color of the picture more vivid. The side-light type backlight source of the invention can provide high-brightness light to improve the brightness of the liquid crystal display screen.

[0016] Such as figure 2 As shown, it is a schematic structural view of the first embodiment of the edge-lit backlight of the present invention. This embodiment includes a light source 10 , a light guide plate 20 , a light source reflection cover 30 , and a reflection plate 40 , wherein a convex lens 50 is correspondingly arranged between the light source 10 and the light guide plate 20 for converging incident light from the light source 10 . The height of the convex lens 50 should be the same as or close to the height of the light guide plate, so that the refraction angle of the light entering the light guide plate should be as concentrated as possible between 1° and...

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Abstract

The invention discloses a side-light type back light, which comprises at least one light source and a light guide plate, wherein a lens is correspondingly arranged between each light source and the light guide plate, and is used for converging incident light of the corresponding light source. The side-light type back light is provided with a lens used for converging the incident light of the corresponding light source between the light source and the light guide plate, thereby effectively improving the utilization rate of the incident light of the light source, reducing the attenuation of light intensity and increasing the brightness of a crystal liquid display screen.

Description

technical field [0001] The invention relates to the field of liquid crystal displays (Liquid Crystal Display, LCD), in particular to an edge-lit backlight source (Back Light, BL). Background technique [0002] At present, in flat panel display (Flat Panel Display, FPD) technology, LCD occupies a dominant position, and transmissive LCD is the mainstream of current LCD technology. Since the LCD panel itself does not emit light, a light source must be added to the LCD panel to make the LCD display, so the backlight is essential for the transmissive LCD. [0003] Generally speaking, according to the different distribution positions of light sources, backlights can be divided into photometric backlights and direct-lit backlights. At present, edge-lit backlights are mainly used in liquid crystal displays, while direct-lit backlights are mainly used in LCD TVs. [0004] Such as figure 1 Shown is a schematic structural view of an edge-lit backlight in the prior art. A typical ed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357F21V5/04
Inventor 马新利
Owner BEIJING BOE OPTOELECTRONCIS TECH CO LTD
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