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Backlight modular

A technology of backlight module and light guide plate, applied in optics, nonlinear optics, instruments, etc., can solve problems such as large mixing distance

Active Publication Date: 2005-01-12
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this light mixing mechanism requires a relatively large light mixing distance, that is, the distance between the LED 104 and the diffuser 106 must be large enough to achieve a uniform light mixing effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0041] Please refer to Figure 2A and Figure 2B , Figure 2A It is a top view of the backlight module according to the first embodiment of the present invention, Figure 2B is along Figure 2A The cross-sectional view of the backlight module viewed by the section line 2B-2B' in .

[0042] The backlight module 200 includes a light mixing device 201 and a frame 212 . An accommodating space 212a is formed in the frame 212, and the accommodating space is surrounded by the bottom plate of the frame and the side plates of the frame, and the light mixing device 201 is disposed in the accommodating space 212a.

[0043] The light mixing device 201 at least includes a circuit board 202 , a plurality of LEDs 204 and a light guide plate 208 . The LEDs 204 are electrically connected to the circuit board 202 and protruded on the circuit board 202 . The LEDs 204 are used to provide the light required by the backlight module 200 . Wherein, these light emitting diodes 204 are, for examp...

no. 2 example

[0049] Please refer to image 3 , which is a side view of the backlight module according to the second embodiment of the present invention. The difference between the backlight module 300 of this embodiment and the backlight module 200 of the first embodiment is that the backlight module 300 further includes at least one diffusion structure 302 and an optical film 304 . As for other identical components, the same reference numerals are used and will not be repeated here.

[0050] The diffusion structure 302 is disposed on the light guide plate 208 to seal the opening 210 and is located above the LEDs 204 . The diffusion structure 302 diffuses the light above the light emitting diodes 204 to avoid local bright bands and increase the overall light mixing effect.

[0051]The optical film 304 is used to receive the light from the light guide plate 208 and the reflective material on the side wall of the frame 212, and further diffuse and mix the light. In this way, while reducin...

no. 3 example

[0054] Please refer to Figure 5 , which is a top view of the backlight module according to the third embodiment of the present invention. exist Figure 5 Among them, the difference between the backlight module 500 of this embodiment and the backlight module 200 of the first embodiment lies in the shape of the opening 504 of the light guide plate 502 .

[0055] These light emitting diodes 204 form several rows of light source groups, such as two rows of light source groups 204a, and the openings on the light guide plate 502 are several grooves, such as Figure 5 There are two grooves 504 shown in , each groove 504 accommodates a row of light source groups 204a. In addition, in this embodiment, at least one diffusion structure can be provided to seal the grooves 504, the diffusion structure is located above the light source group 204a, and the diffusion structure can be a structure of any shape.

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PUM

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Abstract

A backlight module is disclosed in the invention in order to reduce light-mixing distance for light-emitting diode. In the new design, a light guiding plate is setup around light-emitting diodes for mixing light evenly in short distance so as to reduce size of the back light module. The back light module includes a frame, a circuit board, multiple light-emitting diodes and a light-guiding plate. The circuit board is installed in a space formed inside the frame. Light-emitting diodes connected to the circuit board are extended out of the board. The light-guiding plate setup on the circuit board possesses at least one opening to accommodate light-emitting diodes.

Description

technical field [0001] The invention relates to a backlight module, in particular to a light mixing device capable of shortening the light mixing distance and a backlight module for its application. Background technique [0002] A light emitting diode (Light Emitting Diode, LED) is currently one of the main light sources used in a backlight module of a liquid crystal display (LCD), and is a low-power spontaneous light source. The light emitting colors of the LEDs at least include red light (R), green light (G), blue light (B) and white light. Wherein, due to the poor color saturation of white light emitting diodes, colors such as red light, green light, and blue light are generally used for color mixing, so as to obtain white light with preferred color mixing. In addition, due to the advantages of long light-emitting life, small size and low power consumption, light-emitting diodes are very suitable to be made into array components, such as an array light source composed of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
Inventor 周信宏吴志刚
Owner AU OPTRONICS CORP
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