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Improved type backlight module with straightly-down luminous tube structure

A backlight module and direct-lit technology, applied in the field of large liquid crystal displays, can solve problems such as uneven light intensity and uneven intensity

Inactive Publication Date: 2006-10-18
TPO DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned background of the invention, there is a problem of uneven intensity when the light enters the bottom surface of the light guide plate in the large liquid crystal display with the backlight module of the existing direct-type lamp tube structure
[0007] Another object of the present invention is to provide an improved backlight module with a direct-type lamp structure, through the special design of the bottom surface of the light guide plate, to solve the problem of uneven light intensity

Method used

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  • Improved type backlight module with straightly-down luminous tube structure
  • Improved type backlight module with straightly-down luminous tube structure
  • Improved type backlight module with straightly-down luminous tube structure

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Embodiment Construction

[0037] Some embodiments of the present invention are described in detail as follows. However, the invention may also be practiced broadly in other embodiments than those described in detail, and the scope of the invention is not limited only by the following claims.

[0038] Please refer to Figure 4 , is a cross-sectional view of a backlight module 10 with an improved direct-light tube structure according to a preferred embodiment of the present invention. It includes: a light source 12 ; a light guide plate 14 ; a reflection sheet 16 ; a diffusion sheet 18 ; and a prism sheet 20 . The light source 12 is composed of a row of cold cathode lamps (CCFL), but we can also use a matrix formed by light emitting diodes (LED) to replace the aforementioned CCFL. The light guide plate 14 is usually made of polymethyl methacrylate, PMMA or optical plastic (Plastic Division, commonly known as PC material or plastic material), which includes 50-80% titanium dioxide (TiO 2 ) diffusion pa...

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Abstract

An improved backlight module with a direct-down lamp tube structure solves the problem of uneven light intensity through a special design on the surface of a light guide plate. The present invention includes: a light source; a reflector, located below the light source, to reflect light back to improve the brightness of the backlight module; and a light guide plate, located above the light source, wherein the bottom surface of the light guide plate is at the front of the light source The upper first part is flat, and the second part of the bottom surface of the light guide plate not directly above the light source has a plurality of light-concentrating bumps for collecting light to increase the light intensity of the second part.

Description

technical field [0001] The invention relates to a large-scale liquid crystal display, in particular to a large-scale liquid crystal display with a backlight module of a direct-down lamp tube structure. Background technique [0002] Since the liquid crystal itself does not emit light, a light-emitting module is required to enable the liquid crystal to emit light to an appropriate brightness, so that the image can still be displayed on the screen when there is no light. In the case of a notebook computer, 70% of the power is consumed by the light emitting module. Therefore, increasing the brightness of the light-emitting module, or using a lower-power light source to obtain the same brightness can improve the efficiency of the light-emitting module and save power consumption. [0003] The existing light-emitting module structure applied to large-scale liquid crystal displays is generally based on the backlight module 110 with a direct-down lamp structure. Please refer to fig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357G02F1/1335G02B5/02
Inventor 张益煇
Owner TPO DISPLAY