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Direct type backlight module and display device thereof

A backlight module, direct type technology, applied in lighting devices, fixed lighting devices, lighting device parts and other directions, can solve problems such as reducing light uniformity, reduce thickness, increase lighting area, and expand exit angle. Effect

Inactive Publication Date: 2015-02-04
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The light-emitting diode of the direct-lit backlight module is located at the bottom of the backlight module. After a certain light mixing distance (that is, the distance between the backplane and the optical film), the light is modulated by the optical film, so the mixing required by the light-emitting diode The light distance determines that the overall thickness of the direct-type backlight module is larger than that of the side-type backlight module, and if the light mixing distance is reduced, the uniformity of light will be reduced

Method used

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  • Direct type backlight module and display device thereof
  • Direct type backlight module and display device thereof
  • Direct type backlight module and display device thereof

Examples

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Effect test

Embodiment 1

[0050] The light emitting angle of the light source 14 is γ=120°, the light mixing distance is H=10.0mm, and the length of the light source 14 is h=5.6mm. If designed in a conventional manner, the at least one light source 14 can illuminate an area with a diameter d1 = 39.8 mm.

[0051] If it is designed in the manner of the present invention: the angle α=87° between the at least one reflector 16 and the back plate 13, and the angle β=20° between the at least one light source 14 and the back plate 13, then the at least one light source 14 can illuminate Bright area diameter d2=53.1mm.

Embodiment 2

[0053] The light emitting angle of at least one light source is γ=60°, the light mixing distance is H=13.9mm, and the length of at least one light source is h=5.6mm. If designed in a conventional manner, the at least one light source 14 can illuminate an area with a diameter d1 = 20.5 mm.

[0054] If it is designed in the manner of the present invention: the angle α=78° between the at least one reflector 16 and the back plate 13, the angle β=50° between the at least one light source 14 and the back plate 13, the at least one light source 14 can be The diameter of the illuminated area is d2=36.4mm.

[0055] In embodiment 1 and embodiment 2, the results of the diameters d1 and d2 of the area illuminated by the light source 14 are obtained based on such a method in the present invention. First, the known parameters α, β, γ, H, and h are calculated by 1 / The ratio of 1 is drawn on the drawing tool autocad, and then d1 is measured with the measuring tool on the figure. But it is ...

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Abstract

The invention discloses a direct type backlight module and a display device applying the direct type backlight module, which relates to the technical field of display. The direct type backlight module comprises a backboard which is provided with at least one obliquely arranged light source and at least one obliquely arranged reflecting device. The reflecting device is located on one side of the light-out direction of the light source. According to the backlight module provided by the invention, the light mixing distance is reduced without reducing the uniformity of light, so that the direct type backlight module is thinned.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a direct-lit backlight module and a display device thereof. Background technique [0002] Liquid crystal displays have largely replaced traditional cathode ray tube displays due to their thinness and excellent image quality. The backlight module is a very important light-emitting structure in the liquid crystal display. By controlling the light source provided by the backlight module, cooperating with the liquid crystal in the liquid crystal panel, and properly controlling the switch components, the brightness and picture quality of the LCD display screen are determined. [0003] figure 1 It is a three-dimensional exploded view of an existing liquid crystal display. The liquid crystal display generally includes a liquid crystal module and a backlight module 10. The liquid crystal module includes a liquid crystal panel 30 and a front frame 20. The front frame 20 is arranged abov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21S8/00F21V13/02F21Y101/02
Inventor 贾智帅
Owner BOE TECH GRP CO LTD