LCD backlight source structure of LED illumination

A LED lighting and backlight technology, applied in optics, nonlinear optics, instruments, etc., can solve problems affecting the brightness of LCD displays, increasing the thickness of LCD displays, reducing light utilization, etc., to facilitate heat dissipation and improve light intensity uniformity , the effect of high transmittance

Inactive Publication Date: 2007-12-12
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the uniform light mixing of the three primary colors of red, blue and green, the high-power red, blue and green LEDs in the same unit must be close together. As shown in Figure 2, the LED unit 22 consists of a red LED, Composed of two green LEDs and one blue LED, which makes heat dissipation more difficult
At the same time, it is also necessary to increase the height of the bracket box to further improve the uniformity of light color and intensity, so that the thickness of the liquid crystal display is increased; more importantly, the color filter film makes the light passing through it lose 66%, which greatly reduces the light utilization rate , which seriously affects the brightness of LCD displays, especially for large-size LCD displays

Method used

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  • LCD backlight source structure of LED illumination
  • LCD backlight source structure of LED illumination
  • LCD backlight source structure of LED illumination

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no. 1 example

[0042] First, please refer to FIG. 6, which is the first embodiment of the present invention, an LCD backlight structure for LED lighting in the present invention, including:

[0043] A bracket 61, the bracket 61 is a box body with an opening at the top of the bottom surface connected to the heat dissipation plate, the inner side wall and the inner bottom surface of the box body are reflective surfaces 62;

[0044] A two-dimensionally arranged monochromatic LED array 63, the monochromatic LED array 63 is made on the support 61 and arranged on the inner bottom surface of the support 6; the LED lamp used in the two-dimensionally arranged monochromatic LED array 63 is Monochromatic, the LED lamps used in the two-dimensionally arranged monochromatic LED array 63 are high-power ultraviolet LED lamps or blue LED lamps; the wavelength of the blue LED lamps used is 440nm-480nm;

[0045] A diffusion plate 64, the diffusion plate 64 is fabricated above the two-dimensionally arranged mon...

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Abstract

A LED lighting LCD back light source structure comprises a bracket in a box shape with a bottom connected to the radiation plate top with opening, inner side wall of the box and bottom being reflective side, a single color LED matrix in two dimensional arrangement on the bracket distributed on the inner bottom of the bracket, a expansion plate on the top of the single color LED matrix, an optical film combined of the prism film and the expansion film, with the optical film on the expansion plate and a fluorescent powder thin layer on the optical film set.

Description

technical field [0001] The invention relates to an LCD light source device, in particular to an LCD backlight source structure for LED lighting. Background technique [0002] At present, liquid crystal display is developing towards large size and high definition, and the requirements for its light source are further improved. Because LED backlight has many advantages such as high brightness, high color purity, long life, strong adaptability, good reliability, low cost, and easy industrialization, it has gradually replaced the traditional CCFL [0003] light source. With the development of technology, LED will become the ideal backlight source for LCD, occupying the dominant position of large-size LCD backlight source. [0004] Existing LCD backlight sources, especially large-size LCD backlight sources, generally adopt a direct-lit type. As shown in FIG. 1 , it includes: a bracket 11 , a two-dimensional array 13 with red, blue and green LED lights combined as a unit, a dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357H01L33/00G02F1/1335H01L33/50H01L33/58
Inventor 梁萌王国宏范曼宁郭德博
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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