Side-light type backlight module group using LED light source

A technology of LED light source and backlight module, which is applied in the direction of optics, nonlinear optics, and printed circuits connected with non-printed electrical components, and can solve the problems of the distribution of bright areas and dark areas

Inactive Publication Date: 2008-04-30
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

[0004] The purpose of the present invention is to provide a side-lit backlight module using LED light sources, which solves the problem of alternate distribution of bright areas and dark areas when using LED light sources

Method used

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  • Side-light type backlight module group using LED light source
  • Side-light type backlight module group using LED light source

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, invention is further described:

[0019] Fig. 1 is a schematic perspective view of an edge-lit backlight module using an LED light source of the present invention, and Fig. 2 is a schematic top view of the side-light backlight module using an LED light source in Fig. 1, and the light guide plate 14 is omitted in Fig. 2 , As shown in the figure, the edge-lit backlight module using LED light sources of the present invention mainly includes a PCB (printed circuit board) substrate 10 , a packaging structure 11 , a cavity 12 , LED chips 13 and a light guide plate 14 .

[0020] A plurality of LED chips 13 are fixed to the PCB substrate 10 at equal intervals by adhesive or solder, and then the electrical interconnection between the LED chips 13 and the PCB substrate 10 is realized by wire bonding, that is, direct chip on board COB (Chip On Board) packaging technology. The PCB substrate 10 is made of a metal-based or ceramic-base...

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Abstract

The invention discloses a sidelight-typed blacklight module which adopts an LED light-source, which comprises a PCB substrate, LED chips, and a light guide plate. A plurality of LED chips are fixed in equal interval at the PBC substrate; a sealing structure can be used for sealing all LED chips arranged on the PBC substrate; the shape of the sealing structure is a rectangular with length and width same to that of the light guide plate. Except the light-outlet surface of the sealing structure, contacting the light guide plate, rest surfaces of the sealing structure are coated or pasted with reflective material. At the position of each LED chip in the sealing structure, a cavity for containing the LED chip is arranged. The sidelight-typed blacklight module of the invention, which adopts the LED light-source, changes the distribution-type point light into the rectangular panel light which matches with the light inlet surface of the light guide plate, so that the invention can lighten like a CCFL light source at the light inlet side of the light guide plate.

Description

technical field [0001] The invention relates to a side-light backlight module of a liquid crystal display, in particular to a side-light backlight module using an LED light source. Background technique [0002] At present, liquid crystal display has become the mainstream in the field of flat panel display. The backlight module is one of the key components of the liquid crystal display. Since the liquid crystal display itself does not emit light, the function of the backlight module is to provide a light source with sufficient brightness and uniform distribution, so that it can display images normally. Compared with other backlight sources, the most significant advantage of LED light source is that it can provide unprecedented color reproduction. By selecting LEDs with appropriate wavelengths and matching color filters, the color reproduction range of LED backlight sources can reach 105% or even 120% of NTSC (National Television System Committee) standards. In comparison, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357H05K1/18H05K1/00G02F1/1335
Inventor 蔡文彬
Owner 上海广电光电子有限公司
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