Backlight source module with light diffusion component

Abstract

The invention discloses a backlight source module with a light diffusion component, which comprises a rubber frame (1), a back plate (2), a reflecting device (3), a light source (4), a diffusion plate (5) and an optical diaphragm group (6). The light diffusion component (7) placed on the reflecting device (3) is arranged on the outer side of the light source (4), is provided with a plurality of surfaces and consists of at least one total-reflection surface (71), at least one transmission surface (72) and at least one large-angle total-reflection surface (73), the total-reflection surfaces (71) are capable of totally reflecting the light source, the transmission surfaces (72) are capable of transmitting large-angle light rays, and the large-angle total-reflection surfaces (73) are capable of totally reflecting large-angle incident light. The backlight source module is provided with the light diffusion component with the multiple surfaces, the light rays emitted from the light source are totally reflected, refracted and reflected by the aid of the light diffusion component, accordingly, a luminescence form of the light source is changed, a luminous angle of the light source is increased, homogenization and dimming of the light source are realized, and the utilization efficiency of the light source is improved.

Description

technical field [0001] The invention relates to the technical field of backlight source modules of liquid crystal display devices, in particular to a backlight source module with light diffusion components. Background technique [0002] Due to the rapid progress of TFT-LCD production technology, it has the advantages of lightness, thinness, power saving and no radiation, so TFT-LCD is widely used in notebook computers, LCD screens and TVs, etc. It is not a self-illuminating display device, so it needs to cooperate with the light source provided by the backlight module to display the picture required by the liquid crystal panel. figure 1 It is a schematic diagram of the structure of the direct type backlight module, which is represented by figure 1 It can be seen that the backlight module includes a plastic frame 1, a back plate 2, a reflection device 3, a light source 4, a diffuser plate 5 and an optical film set 6, wherein the back plate 2 is located on the lower side of ...

AI Technical Summary

Problems solved by technology

If the distance (Pitch) between the light sources 4 is too large, dark areas will be formed between the light sources 4, resulting in poor optical quality (i.e. the Mura phenomenon) of uneven light and shade; although reducing the distance between the light sources 4 can improve the above-mentioned problem, but the number of light sources 4 used in the backlight module will increase, resulting in problems such as the difficulty of thinning the backlight module; in addition, expanding the distance between the light source 4 and the diffuser plate 5 can also improve the above problems, but it will make the The thickness of the backlight module increases

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