Back light module

A backlight module and backplane technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of polarizer deformation and affecting the display quality of liquid crystal display modules, and achieve the effect of avoiding deformation and warping

Inactive Publication Date: 2007-10-03
CHUNGHWA PICTURE TUBES LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In more detail, since the front frame 124 of the plastic frame 120 presses the edge of the optical film 115 tightly, when the external temperature changes, the optical film 115 will be deformed and warped due to the restriction of the front frame 124, and The warped optical film 115 will further squeeze the polarizer of the liquid crystal cell and cause the deformation of the polarizer, thus affecting the display quality of the liquid crystal display module

Method used

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Embodiment Construction

[0057]FIG. 2A shows a top view of a backlight module according to a preferred embodiment of the present invention, and FIG. 2B shows a B-B' cross-sectional view of FIG. 2A. Please refer to FIG. 2A and FIG. 2B , the backlight module 200 includes, for example, a back plate 205 , an optical plate 210 , at least one light source 215 , a plastic frame 220 and at least one optical film 230 . In more detail, the optical plate 210 is, for example, a light guide plate or a diffuser plate, and is disposed on the back plate 205 . The material of the back plate 205 is, for example, metal, preferably aluminum. The material of the optical plate 210 is, for example, polymethyl methacrylate (PMMA), which is used to evenly guide the light emitted by the light source 215 to a light emitting surface 212 to ensure uniform brightness of the backlight module 200 . The light source 215 is, for example, a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), a light emitting diode (Li...

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Abstract

The present invention discloses one kind of backlight module for LCD , The back light module includes one back plate, one optical plate on the back plate, at least one light source near the optical plate, one plastic frame and at least one optical diaphragm. The plastic frame around the back plate has one protuberant structure set between the light outgoing plane of the optical plate and the front frame of the plastic frame to form one interval for setting the optical diaphragm between the light outgoing plane and the front frame. The present invention discloses also one kind of LCD including one back light module and one LCD panel set on the plastic frame of the back light module.

Description

technical field [0001] The invention relates to a light source module, in particular to a backlight module for liquid crystal displays and a liquid crystal display module using the backlight module. Background technique [0002] The liquid crystal display module in the liquid crystal display (Liquid Crystal Display, LCD) itself is a non-self-luminous display element, and the required light source needs to be provided by the backlight module. Since the performance of the backlight module will directly affect the quality of the liquid crystal display module, the backlight module is a very important component in the liquid crystal display module. [0003] Referring to FIGS. 1A to 1C , FIG. 1A shows a schematic assembly diagram of a conventional backlight module, FIG. 1B shows a top view of FIG. 1A , and FIG. 1C shows a cross-sectional view of A-A' of FIG. 1B . The conventional backlight module includes a backplane 105 , a light guide plate 110 , a light source 112 , at least o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
Inventor 胡正中
Owner CHUNGHWA PICTURE TUBES LTD
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