Structure for improving dark bands of backlight module and method thereof

Abstract

The invention relates to a structure for improving dark bands of a backlight module and a method thereof, wherein, a plurality of light sources are arranged on an incident light surface of a diffusion plate of the direct backlight module; a plurality of minimum thickness which is less than the average thickness of the diffusion plate are distributed on the diffusion plate between two light sources; and original light sources with greater light quantity are provided from the position of the minimum thickness or original light sources which are relatively more mixed are provided so as to lower or eliminate the dark bands of the diffusion plate generated between two light sources.

Description

technical field [0001] The invention relates to a backlight module, in particular to a structure and a method for improving the dark band of the backlight module. Background technique [0002] At present, the backlight module used as a backlight source can include two types of side-light type and direct-light type according to the different projection directions of the light source; the side-light type backlight module uses at least one side of the light guide plate as the light incident surface, and the light source enters from the light input surface. The light surface projects the light into the light guide plate for transmission, and then reflects the light through the light exit surface and the optical film through the reflection sheet arranged symmetrically to the light exit surface to produce a luminous effect. [0003] Such as figure 1 and figure 2 As shown in the direct type backlight module, a plurality of light sources 2 are arranged in the inner space of a bac...

AI Technical Summary

Problems solved by technology

[0008] The improvement plan of the patent No. 200739203 published in Taiwan, China is to set a plurality of elongated holes through the two sides of the substrate on the diffuser plate, so that each hole has an arc surface. This design is different from the aforementioned method of using diffusion or focusing. There is no difference in eliminating dark bands, and the effect that can be achieved is really limited

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