Double-layer light mixing cavity direct type module

Abstract

The invention discloses a double-layer light mixing cavity direct type module. The double-layer light mixing cavity direct type module comprises a back plate, an LED lamp, a first diffusion plate, a second diffusion plate, a first support and a second support. The first diffusion plate is mounted on the back plate through the first support, the second diffusion plate is installed on the back platethrough the second support and located above the first diffusion plate, a first light mixing cavity is formed between the first diffusion plate and the back plate, a second light mixing cavity is formed between the second diffusion plate and the first diffusion plate, and the LED lamp is installed on the back plate and located in the first light mixing cavity. According to the double-layer lightmixing cavity direct type module, light emitted by an LED lamp is atomized and homogenized by the first layer of diffusion plate and then atomized and homogenized again by the second layer, and therefore, the uniform and consistent backlight module is obtained through the small number of point light sources and the thin light mixing cavity.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display screens, in particular to a direct-down module with a double-layer light mixing cavity. Background technique [0002] At present, there are two types of LCD TV backlights, one is the direct type, and the other is the side type. Such as figure 1 As shown: the direct-type backlight method is to arrange the LED lights 2 in a matrix on the TV backplane 1, and then atomize the light through the diffuser plate 11 and the diaphragm 10, so as to obtain a backlight module with uniform backlight distribution; figure 2 In the side-entry backlight method shown, the LED lights 2 are arranged in a line on one or both sides of the TV backplane 1, and then the light is uniformized to the plane through the light guide plate 12 and the diaphragm 10, thereby obtaining a backlight Evenly distributed backlight modules; however, the cost of side-lit backlights is relatively high at present, and the co...

AI Technical Summary

Problems solved by technology

like figure 1 As shown: the direct-type backlight method is to arrange the LED lights 2 in a matrix on the TV backplane 1, and then atomize the light through the diffuser plate 11 and the diaphragm 10, so as to obtain a backlight module with uniform backlight distribution; figure 2 In the side-entry backlight method shown, the LED lights 2 are arranged in a line on one or both sides of the TV backplane 1, and then the light is uniformized to the plane through the light guide plate 12 and the diaphragm 10, thereby obtaining a backlight Evenly distributed backlight modules; however, the cost of side-lit backlights is relatively high at present, and the cost of backlights is often twice that of direct-lit models of the same size, while the light-mixing cavity of direct-lit backlight modules is usually relatively thick, and the thickness of TVs cannot match Edge-lit backlit TVs comparable

[0003] The authorized announcement number is: CN202708809, the authorized announcement date is January 30, 2013, and the Chinese patent titled "a new type of LCD backlight module" discloses a backlight module that makes the emitted light more uniform and bright through a three-layer diffuser plate. The disadvantage of this patent is that the LED light source is arranged on the side of the TV backplane, and the light is uniformized after passing through the light guide plate, and the manufacturing cost is relatively high.

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