LED backlight module

A technology of backlight module and light source, applied in optics, light guide, light source and other directions, can solve the problems of dark area and large mixing distance, and achieve the effect of saving cost, reducing light mixing distance and reducing the number of use.

Active Publication Date: 2009-11-04
SHANGHAI AVIC OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of large light mixing distance and dark area between two adjacent LEDs in the prior art, and provide an LED that can effectively reduce the light mixing distance and eliminate the dark area existing between two light-emitting sources. Backlight module

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0033] figure 2 It is a top view of the structure of the first embodiment of the present invention, as figure 2 As shown, the backlight module 200 includes at least one LED light source 201, a reflector 205, a rectangular light guide plate 202, a frame 203 and a set of optical films (not shown). The light guide plate 202 has a light incident surface 204 , and the reflection surface of the reflection device 205 is disposed opposite to the light incident surface 204 of the light guide plate 202 . The LED light source 201 is arranged between the reflection device 205 and the light incident surface 204 of the light guide plate 202, and the light output surface of the LED light source 201 is inclined towards the light incident surface 204 of the light guide plate 202 and arranged at a certain angle b, and the angle b is greater than 0 ° and less than 90°.

[0034] image 3 yes figure 2 Schematic diagram of the improved arrangement of the LED light source 201 in the middle, s...

Embodiment 2

[0038] Such as Figure 8 As shown, the backlight module of the present invention includes: at least one LED light source 310, the appearance of the LED light source 310 has a light output surface inclined towards the light incident surface 204 of the light guide plate 202; a reflection device 205, a light guide plate 202, a frame 203 and a set of optical films (not shown). The LED light source 310 is disposed between the reflection device 205 and the light incident surface 204 of the light guide plate 202 , and the light output surface of the LED light source 310 is inclined toward the light incident surface 204 of the light guide plate 202 . In this embodiment, the LED light source 310 has a trapezoidal shape in cross section.

[0039] Figure 9 yes Figure 8 Another improved structure schematic diagram of the LED light source 310 in the middle, such as Figure 9As shown, the appearance of the LED light source 320 with this structure has a light-emitting surface on an obl...

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PUM

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Abstract

The invention discloses an LED backlight module which comprises a light guide plate and at least one LED luminous source, wherein the light guide plate is at least provided with a light incidence surface; the LED luminous source is arranged opposite to the light incidence surface of the light guide plate; the LED luminous source is provided with a light emission surface facing to the light incidence surface of the light guide plate and at least arranged at one side of the light guide plate; the light emission surface of the LED luminous source forms an inclination angle of larger than 0 DEG and less than 90 DEG relatively to the light incidence surface of the light guide plate. The LED backlight module can reduce a mixed light distance between adjacent LEDs in the prior LED backlight source art, reduce and even eliminate a dark area, save the cost and reduce the heat emission of the module.

Description

technical field [0001] The invention relates to an LED backlight module, in particular to an LED backlight module for a liquid crystal display device. Background technique [0002] Liquid crystal display devices have the characteristics of light weight, thin thickness, low power consumption and low radiation. They have been widely used in information technology, multimedia technology and other fields, and have gradually become the mainstream of various display devices. Since the liquid crystal panel itself does not emit light, a backlight module is required to provide a light source for it. Because LEDs (light emitting diodes) have the characteristics of no pollution, long life, shock resistance, impact resistance and no pollution, LEDs have been widely used in backlight modules for mobile phones, mobile phones, PDAs, and display screens. In recent years, due to the advancement of technology, the brightness of LED has been greatly improved, and it has become the choice of b...

Claims

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Application Information

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IPC IPC(8): F21V8/00F21V19/00G02F1/13357F21Y101/02G02F1/1335
Inventor 苏世虎
Owner SHANGHAI AVIC OPTOELECTRONICS
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