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Direct down type backlight module

A backlight module, direct-type technology, applied in the field of backlight, can solve the problems of unfavorable ultra-thin development trend, increase in thickness of LED modules, etc., and achieve the effect of avoiding matching requirements, reducing the number of use, and easy assembly.

Active Publication Date: 2013-06-19
APT ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This directly leads to an increase in the thickness of the LED module, which is not conducive to the current development trend of ultra-thin

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 with 2 As shown, this embodiment discloses a direct-type backlight module, which includes an LED light source 2, a PCB board 1, a secondary optical lens 3, and a diffusion plate 4, and the LED light source 2 is fixedly connected to the On the PCB board 1, the secondary optical lens 3 is fastened above the LED light source 2, and the secondary optical lens 3 includes a secondary lens body 32, and the secondary lens body 32 is connected to the LED light source 2. A first groove 31 is arranged on the adjacent side, and a second groove 33 is arranged on the side adjacent to the diffusion plate 4 of the secondary lens body 32, and the diffusion plate 4 is arranged on the side of the secondary optical lens 3. above. Such as image 3 As shown, the light emitted by the LED light source 2 passes through the groove surface of the first groove 31 and is diffused to a range of 45-85° left and right from the vertical line (such as Figure 4 shown), and then pass...

Embodiment 2

[0049] Such as Figure 5 As shown, the difference between this example and Embodiment 1 lies in the shape of the secondary optical lens, and the other parts and structures of this embodiment are completely the same as Embodiment 1.

Embodiment 3

[0051] Such as Image 6 As shown, the difference between this example and Embodiment 1 is only the shape of the secondary optical lens, and the other parts and structures of this embodiment are completely the same as Embodiment 1.

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Abstract

The invention relates to a liquid crystal display (LCD) backlight technology, and particularly discloses a direct down type backlight module. The direct down type backlight module comprises a light-emitting diode (LED) light source, a printed circuit board (PCB), a secondary optical lens and a diffusion plate, wherein light rays emitted by the LED light source are spread to a range in which the light rays deviate from a vertical line about 45-85 degrees through a groove face of a first groove, then the light rays reach a groove face of a second groove by penetrating through a secondary lens body, part of the light rays are refracted to the diffusion plate, and the other part of the light rays have total reflection and are emitted out from the side face of the secondary lens body. According to the direct down type backlight module, direct down type backlight source selectivity is enabled to be wide, thinness of LED liquid crystal panels is achieved at the same time, and meanwhile, cost is further reduced. The direct down type backlight module further can enable direct down type assembling to be simplified and guarantees that the secondary optical lens has enough mechanical strength and has good protection effects.

Description

technical field [0001] The invention relates to a backlight technology of a liquid crystal display screen, in particular to a direct-down backlight module. Background technique [0002] At present, the penetration rate of LED as a backlight in the field of LCD panel display has exceeded 90%. There are mainly two types of backlight module architectures: side-type and direct-type. The side-type LED backlight is to install the LED light source on the side of the light guide plate. Scattering directs the light out, the disadvantage of which is that the resulting picture contrast is relatively poor and local dimming is not possible. The direct-lit LED backlight can present images more accurately, and exhibit excellent color and light-dark contrast effects, which has gradually become the mainstream trend in the market. [0003] The direct type LED backlight module generally includes an LCD display, a diffuser plate and a PCB board. There are several packaged LED light sources on...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V5/04F21V17/10G02F1/13357F21Y101/02F21Y115/10
Inventor 万垂铭陈海英何贵平姚述光许朝军区伟能
Owner APT ELECTRONICS
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