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PCB and direct type backlight module with PCB

A backlight module, direct-type technology, applied in the field of direct-type backlight modules, can solve the problem of uneven lighting and shadow display, and achieve the effect of weakening the lighting phenomenon, simple solution, and improving optical taste.

Active Publication Date: 2015-04-22
ANHUI COREACH TECH
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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 solve the technical problems of lamp shadows and uneven display caused by the use of traditional and black circle PCBs in existing direct-lit backlight modules

Method used

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  • PCB and direct type backlight module with PCB
  • PCB and direct type backlight module with PCB
  • PCB and direct type backlight module with PCB

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as Figure 6 As shown, a PCB, which is used in a direct type backlight module, is characterized in that the upper surface of the solder resist layer of the PCB 12 has a plurality of dots 14, and the dots 14 are arranged layer by layer with the LED pad 17 as the center. The distribution range of 14 is limited in the secondary optical lens silk screen 16 on the PCB12. The secondary optical lens silk screen 16 is the position where the secondary optical lens 13 is installed on the PCB 12, and the dots 14 are distributed in the secondary optical lens silk screen 16, so that the dots 14 of all facilities can play an effective role. The shape of the distribution range of the dots 14 is circular, and the diameter of the dots 14 is 0.5 mm. The dots 14 around the LED pad 17 absorb light unevenly, which can weaken the light near the LED lamp 11 and relatively improve the reflection of light away from the LED lamp 11, so that the light of the backlight module using the PCB i...

Embodiment 2

[0026] Such as Figure 7 As shown, a PCB, which is used in a direct type backlight module, is characterized in that the upper surface of the solder resist layer of the PCB 12 has a plurality of dots 14, and the dots 14 are arranged layer by layer with the LED pad 17 as the center. The distribution range of 14 is limited in the secondary optical lens silk screen 16 on the PCB12. The secondary optical lens silk screen 16 is the position where the secondary optical lens 13 is installed on the PCB 12, and the dots 14 are distributed in the secondary optical lens silk screen 16, so that the dots 14 of all facilities can play an effective role. The shape of the distribution range of the dots 14 is square, and the diameter of the dots 14 is 1.5 mm. The dots 14 around the LED pad 17 absorb light unevenly, which can weaken the light near the LED lamp 11 and relatively improve the reflection of light away from the LED lamp 11, so that the light of the backlight module using the PCB is ...

Embodiment 3

[0028] Such as Figure 8 As shown, a PCB is used in a direct-type backlight module. There are a plurality of dots 14 on the upper surface of the solder resist layer of the PCB 12. The dots 14 are arranged layer by layer with the LED pad 17 as the center. The distribution range of the dots 14 is It is limited within the silk screen 16 of the secondary optical lens on the PCB12. The secondary optical lens silk screen 16 is the position where the secondary optical lens 13 is installed on the PCB 12, and the dots 14 are distributed in the secondary optical lens silk screen 16, so that the dots 14 of all facilities can play an effective role. The shape of the distribution range of the dots 14 is rhombus, and the diameter of the dots 14 is 2 mm. The dots 14 around the LED pad 17 absorb light unevenly, which can weaken the light near the LED lamp 11 and relatively improve the reflection of light away from the LED lamp 11, so that the light of the backlight module using the PCB is mo...

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Abstract

The invention discloses a PCB and a direct type backlight module with the PCB and relates to the technical field of backlight. The PCB is provided with multiple network points. The network points are arranged layer by layer with LEDs serving as the centers and limited within the lens screen printing range. The direct type backlight module comprises a lamp bar. The lamp bar is composed of lenses, the LEDs and the PCB. Compared with the prior art, the PCB and the direct type backlight module have the following advantages that different network points and arrangement modes can be adopted according to actual requirements, the optical level of the direct type backlight module can be effectively improved, the lamp shadow phenomenon is weakened, cost is reduced, the scheme of the PCB and the direct type backlight module is simple, cost is low, the lamp shadow problem can be effectively solved, illumination evenness is improved, and the cost of the backlight module can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of backlights of liquid crystal displays, in particular to a PCB and a direct-lit backlight module applied thereto, which improves optical quality and improves the display effect of the backlight module. Background technique [0002] With the introduction of energy-saving and environmental protection policies, LED LCD TVs gradually replace traditional CRT TVs and occupy more and more markets. With the gradual reduction of the light mixing distance of the module, the light irradiated on the LCD panel is uneven, resulting in the phenomenon of light shadows. The problem of light shadows has become a resistance to the process of ultra-thin backlight modules. There are two traditional solutions for light shadows. One is to increase the number of diaphragms, but the cost will increase; the other is to draw a black circle on the PCB. Although this method can weaken part of the light shadow, the black circle absorbs...

Claims

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Application Information

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IPC IPC(8): F21V19/00F21S8/00F21Y101/02
CPCF21S8/00F21V19/001F21V19/005
Inventor 杨周彭友陈龙年靠江陈宝
Owner ANHUI COREACH TECH
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