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Directly-down back light module unit

A backlight module and direct-type technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of reducing the thickness of the direct-type backlight module, large induced current, and reduced luminous efficiency of the lamp tube, and achieves a reduction Thickness, reduce the induced current, ensure the effect of luminous efficiency

Inactive Publication Date: 2008-04-16
上海广电光电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a direct-lit backlight module, which solves the problem of the reduction of the luminous efficiency of the lamp tube and the brightness of the high-voltage end and low-voltage end of the lamp tube due to the large induced current caused by the excessive parasitic capacitance between the backplane and the lamp tube. The gap is too large, and at the same time, the thickness of the direct-lit backlight module can be reduced

Method used

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Embodiment Construction

[0019] Embodiments of the invention will be further described below in conjunction with the accompanying drawings:

[0020] Fig. 2 is a schematic diagram of an embodiment of the direct-type backlight module of the present invention, as shown in the figure, the direct-type backlight module of the present invention includes: several optical films 110; a diffusion plate 120 placed on the optical film 110; a number of lamp tubes 130 arranged in parallel are placed under the diffusion plate 120; a reflector 140 is placed under the lamp tube 130; a back plate 150 is placed under the reflector 140 for fixing The reflection sheet 140 is supported.

[0021] The back plate 150 below each light tube 130 is bent downward to form a back plate groove 151. In a preferred embodiment, the back plate groove 151 is located directly below the light tube 130, and the back plate groove 151 The cross-sectional shape of the groove is trapezoidal, and the cross-sectional shape of the back plate groov...

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Abstract

The invention discloses a straight down type backlight module for a liquid crystal display. The straight down type backlight module comprises an optical film, a diffuser plate arranged below the optical film, a plurality of paralleled lamp tubes arranged below the diffuser plate, a reflection piece arranged below the lamp tubes, a back plate arranged below the reflection piece, a plurality of back plate grooves which are formed by the back plate bent downward and are arranged on the back plate below the lamp tubes, or a plurality of back plate openings arranged below the lamp tubes. The straight down type backlight module of the invention can effectively reduce induced current caused by parasitic capacitance between the back plate and the lamp tubes, ensure the luminous efficiency of the lamp tubes and the luminous uniformity on both ends of the lamp tubes, and also reduce the thickness of the whole backlight module.

Description

technical field [0001] The invention relates to a direct-down backlight module of a liquid crystal display, in particular to a direct-down backlight module of a liquid crystal display capable of effectively reducing induced currents generated due to parasitic capacitance. Background technique [0002] In the current information society, electronic display devices are becoming more and more important, so electronic display devices are used in various products. In addition, in order to meet the increasingly advanced information society, electronic display devices with new functions are invented. Usually, electronic display devices provide information for human beings. Electronic display devices convert electrical signals output from various electronic devices into optical signals for people to see and receive. Electronic display devices are the communication bridge between human beings and electronic devices. [0003] There are two types of electronic display devices: active ...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G02F1/1335
Inventor 崔品静
Owner 上海广电光电子有限公司
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