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Liquid crystal screen back light source

A liquid crystal display and backlight technology, applied in optics, nonlinear optics, instruments, etc., to achieve good light mixing and luminous efficiency, and solve the effect of high cost

Inactive Publication Date: 2007-01-24
INTEX OPTOELECTRONICS XIAMEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the white light source of light-emitting diodes is mainly composed of blue light + phosphor (restricted patent issue) and R·G·B three-color mixed light (restricted cost issue), so there is still a lot of improvement in the light source design space

Method used

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  • Liquid crystal screen back light source
  • Liquid crystal screen back light source
  • Liquid crystal screen back light source

Examples

Experimental program
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Embodiment Construction

[0019] A kind of LCD backlight of the present invention, such as figure 1 As shown, it includes a diffuser film (upper) 1, a light collecting prism diaphragm PX2, PY3, a diffuser film (lower) 4, a light guide plate 5, a reflector 6, a base 7, a plurality of LEDs 8, and a plurality of LEDs ( Blue light and yellow light) 8 are arranged in an interactive manner to form a white light side light source (mixed light effect). A piece of diffuser film (bottom) 4 with low light transmittance diffuses and deflects the light emitted from the light guide plate 5, and then passes through two light-collecting prism sheets PX2 and PY3 with continuous zigzag grooves on the surface to make the light in XY The direction collects light and adjusts the light distribution angle, and finally passes through a high-transmittance diffusion film (upper) 1, so that the light is evenly and vertically incident on the LCD screen. Base 7 will be used as a supporting base for this module structure.

[0020...

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Abstract

Being in use for backlight source of liquid crystal screen, the combined light source includes light source composed of multiple pieces of LED, diffusion membrane (upper, lower), membrane of light collection prism (PX,PY), light guiding plate, reflection piece, base. Characters are that basis material of front semiconductor backlight source is transparent material; using reflection of light guiding plate, both of sidelight and front backlight produce reinforced and mixed color light, especially effect of mixing LED in yellow light and blue light, or effect of mixing red, green and blue lights mixed to produce white light.

Description

technical field [0001] The invention provides a liquid crystal display backlight, especially provides that both the side light and the front backlight can be reflected by a light guide plate to enhance light emission or emit mixed-color light. Background technique [0002] In recent years, liquid crystal displays (Liquid-Crystal Display, LCD) are widely used in large, medium and small size display panels such as computer screens, personal digital assistants (PDAs), digital cameras and mobile phones. It is the technology with the largest output value in flat-panel displays, and it is the mainstream technology in the current market. [0003] Since the LCD itself is a passive luminescent display device, it must rely on a backlight source to achieve a display effect, so the performance of the backlight source will directly affect the display quality of the LCD. [0004] At present, the backlight module for LCD backlight: mainly consists of light source (including cold cathode f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
Inventor 童胜男
Owner INTEX OPTOELECTRONICS XIAMEN CO LTD
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