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Direct type backlight source of liquid crystal display screen

A liquid crystal display, direct type technology, applied in the field of direct type backlight, LCD backlight, to achieve the effect of reducing costs

Active Publication Date: 2012-05-02
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a liquid crystal display direct-lit backlight for the shortcomings of the prior art direct-lit LED backlight and the uniform distribution of LEDs.

Method used

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  • Direct type backlight source of liquid crystal display screen
  • Direct type backlight source of liquid crystal display screen
  • Direct type backlight source of liquid crystal display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 2 As shown, the direct-lit backlight for liquid crystal display in this example includes a substrate 1 and LEDs 10 mounted on the substrate 1 . In this example, the distribution of LEDs 10 on the substrate 1 is dense in the middle and sparse in the periphery. The area where the intersection of the horizontal axis X and the vertical axis Y of the substrate 1 is located is the central area of ​​the substrate 1 , and the distribution density of LEDs 10 in this area is greater than that of the peripheral area of ​​the substrate 1 . In addition, the distribution of the LEDs 10 in this example takes the horizontal axis X as the symmetrical axis and the vertical axis Y as the symmetrical axis. and figure 1 Comparing the uniform distribution methods shown, it can be seen that the reduction of the usage of LED 10 is very obvious.

Embodiment 2

[0038] In this example, the direct-lit backlight of the liquid crystal display screen, the distribution of LED10 on the substrate 1 is as follows: image 3 As shown, the LEDs 10 are arranged in N rows and M columns, where N=9 and M=10 in this example. image 3 , the row spacing of the LED10 arrangement remains unchanged, and the column spacing increases from the central area of ​​the substrate to the peripheral area of ​​the substrate, that is image 3 From the area where the vertical axis (Y axis) is located, the column spacing is along the X direction and the -X direction ( image 3 in the left and right directions) gradually increase. In this distribution mode, the distribution of LEDs is symmetrical, and the X-axis and Y-axis are their symmetry axes. In this example, the LEDs can be packaged into LED light strips first, and each LED light strip has the same structure, the number of LEDs is equal (9 pieces), and the spacing is the same, which is convenient for standardize...

Embodiment 3

[0040] Such as Figure 4 As shown, in this example, the direct-lit backlight of the liquid crystal display screen, the LEDs 10 are also arranged in N rows and M columns on the substrate 1, where N=7 and M=16 in this example. Figure 4 , the column spacing of the LED10 array remains unchanged, and the row spacing increases from the central area of ​​the substrate to the peripheral area of ​​the substrate, that is Figure 4 From the area where the horizontal axis (X axis) is located, the line spacing is along the Y direction and the -Y direction ( Figure 4in the upper and lower directions) gradually increase. In the distribution mode of this solution, the distribution of LEDs is symmetrical, and the X-axis and Y-axis are their symmetry axes. In this example, LEDs can be packaged into LED light strips first, and each LED light strip has the same structure, the number of LEDs is equal (16 pieces), and the spacing is the same, which is convenient for standardized production. Wh...

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Abstract

The invention relates to a liquid crystal display screen, in particular to a backlight source of the liquid crystal display screen, especially a direct type backlight source. Specific to the defects brought by uniform LED distribution of the direct type LED backlight source in the prior art, the invention discloses a direct type backlight source of a liquid crystal display screen. In a technical scheme provided by the invention, the direct type backlight source of the liquid crystal display screen comprises a substrate, wherein LEDs are arranged on the substrate in a nonuniform manner. For the technical scheme provided by the invention, the LED distribution on the substrate of the direct type LED backlight source is regulated, the traditional uniform distribution technology is discarded, and on the premise of guaranteeing that the a screen luminance uniformity index meets a basic requirement (the screen luminance uniformity>70%), the number of LEDs can be reduced by about 5-15%, so that the requirements on energy saving, consumption reduction and cost reduction are met. The direct type backlight source disclosed by the invention is mainly applied to the liquid crystal display screen, particular a large-screen liquid crystal display screen.

Description

technical field [0001] The invention relates to a liquid crystal display screen, in particular to a backlight source for a liquid crystal display screen, and in particular to a direct-type backlight source. Background technique [0002] Liquid crystal display (LCD) is a flat-panel display device. Its working principle is to use the liquid crystal material to modulate light under the action of an electric field to produce various light and dark and color changes to form images. Since the liquid crystal material itself does not emit light, liquid crystal displays require a special backlight source. According to the different setting methods of the backlight, the backlight of the liquid crystal display screen with LED (light-emitting diode) as the light-emitting element can be divided into a side-type backlight and a direct-type backlight. For liquid crystal displays with direct-lit backlight, the backlight is placed directly behind the LCD screen. This backlight structure is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V19/00G02F1/13357F21Y101/02
Inventor 江友才熊斌陈科仲
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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