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Optical plate, backlight module applying same and LCD device

A liquid crystal display and backlight module technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low light utilization rate of the backlight module 10 and the like

Inactive Publication Date: 2008-09-10
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the S off-axis light 16S emitted by the light source 16 accounts for about half of the total light quantity. In other words, the P off-axis light 16P that accounts for about half of the total light quantity is not utilized. Therefore, the light utilization rate of the backlight module 10 is relatively low. Therefore, how to enhance the light utilization rate of the backlight module 10 is actually a difficult problem that must be overcome at present.

Method used

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  • Optical plate, backlight module applying same and LCD device
  • Optical plate, backlight module applying same and LCD device
  • Optical plate, backlight module applying same and LCD device

Examples

Experimental program
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no. 1 example

[0024] Please refer to figure 2 , figure 2 It is the liquid crystal display of the first embodiment of the present invention. The liquid crystal display 2 includes a liquid crystal display panel 22 , polarizers 24A, 24B attached to upper and lower surfaces of the liquid crystal display panel 22 , and a backlight module 20 . The components and descriptions of the liquid crystal display panel 22 and the polarizers 24A and 24B are as described in the prior art, and will not be repeated here.

[0025] The backlight module 20 includes an optical board 200 and a plurality of light sources 26. The backlight module 20 of this embodiment is an example of a direct type backlight module. Therefore, a plurality of light sources 26 are arranged under the optical board 200. The plurality of light sources 26 can be, for example, Cold-cathode fluorescent tubes, external electrode fluorescent tubes, mercury lamps, halogen lamps, or light-emitting diodes, etc., reflectors 28 are selectively...

no. 2 example

[0028] Please refer to image 3 , image 3 It is the liquid crystal display of the second embodiment of the present invention. The liquid crystal display 3 includes a liquid crystal display panel 32 , polarizers 34A, 34B attached to upper and lower surfaces of the liquid crystal display panel 32 , and a backlight module 30 . The components and descriptions of the liquid crystal display panel 32 and the polarizers 34A and 34B are as described in the prior art, and will not be repeated here.

[0029]The backlight module 30 includes an optical board 300 and a plurality of light sources 36. The backlight module 30 of this embodiment takes a direct-type backlight module as an example. Therefore, a plurality of light sources 36 are arranged under the optical board 300, and the plurality of light sources 36 are selectively placed under the optical board 300. A reflective plate 38 is arranged to reflect the light emitted downwards from the plurality of light sources 36 to improve li...

no. 3 example

[0031] Please refer to Figure 4 , Figure 4 It is the liquid crystal display of the third embodiment of the present invention. The liquid crystal display 4 includes a liquid crystal display panel 42 , polarizers 44A, 44B attached to upper and lower surfaces of the liquid crystal display panel 42 , and a backlight module 40 . The components and descriptions of the liquid crystal display panel 42 and the polarizers 44A and 44B are as described in the prior art, and will not be repeated here.

[0032] The backlight module 40 includes an optical plate 400 and a plurality of light sources 46. The backlight module 40 of this embodiment takes an edge-lit backlight module as an example. Therefore, the base 401 can be a light guide plate with a light guiding function, and the base 401 has a plurality of protrusions. portion 4012 and a plurality of flat portions 4011, wherein the convex portion 4012 and the flat portion 4011 are at least one-to-one staggered with each other, a plural...

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Abstract

The invention relates to an optical plate and a backlight module which uses the optical plate and a liquid crystal display, wherein, the optical plate comprises a basement and an adapting layer. The basement has a plurality of convex parts and a plurality of flat parts, wherein, the convex parts and the flat parts are at least alternatively arrayed one to one and at least an auxiliary structure is arranged at the convex parts, wherein the auxiliary structure is provided with birefringence and the adapting layer is arranged at the substrate and the auxiliary structure.

Description

【Technical field】 [0001] The invention relates to an optical plate, a backlight module and a liquid crystal display using the same, which can effectively improve the light utilization rate. 【Background technique】 [0002] As the liquid crystal display panel technology becomes increasingly sophisticated, the liquid crystal display panel has been widely used in products such as digital cameras, digital personal assistants (PDAs), mobile phones, and flat and thin TVs. In addition to the basic display function, the application of the liquid crystal display panel is becoming more and more extensive in order to meet various demands. Since the liquid crystal display panel is a passive light-emitting device, it needs to use an external light source, such as an external light source or a backlight module, to exert the display effect. [0003] It is worth noting that, as the market prefers thin, light, small and energy-saving liquid crystal displays, the research on how to improve th...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G02F1/1335
Inventor 王耀龙郑新安林洋巨蔡海恩
Owner AU OPTRONICS CORP
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