Backlight module and assembly method thereof

Abstract

The invention relates to a backlight module and an assembly method thereof. The backlight module comprises a light guide plate, a light emitting unit and a membrane material unit, wherein the light guide plate is provided with a light extraction surface, a bottom surface and a side face; the bottom surface is opposite to the light extraction surface; the side face is connected with at least one of the light extraction surface and the bottom surface; a light ray which is emitted from the light emitting unit enters the light guide plate; the size of the membrane material unit is more than that of the light guide plate; the light guide plate is accommodated in the membrane material unit; the membrane material unit is provided with at least one light shading part; the light shading part shades the side face of the light guide plate; and the membrane material unit comprises a first membrane material and a second membrane material which are connected with each other. The invention has the advantages that: the emitting of the light ray from the side face of the light guide plate is avoided, so the function of preventing a light from being leaked from the side face of the backlight module is realized; and an adhesive frame of the backlight module of the prior art is replaced by the membrane material unit so as to contribute to thinning of the backlight module.

Description

technical field [0001] The invention relates to a backlight module, in particular to the structure of the backlight module and its assembly method. Background technique [0002] The backlight module (backlight module) is an optical module that converts the light emitted by a point light source or a line light source into a surface light source through the design of an optical structure. The application field of the backlight module is not only a liquid crystal display device, but also can be used as a backlight source for a luminous keyboard, an advertising light box, and the like. As products tend to be thinner and lighter, the thinner and lighter design of the backlight module has gradually become an important issue. [0003] Taking the backlight module of a liquid crystal display device as an example, according to the positions of different light sources, the backlight module can be divided into direct type and edge light type. Please refer to figure 1 As shown, a side...

AI Technical Summary

Problems solved by technology

However, as the backlight module 1 gradually becomes thinner and thinner, the plastic frame 16 manufactured by injection molding becomes more and more difficult to design and manufacture, and the thinner plastic frame 16 is also easy to break or break during the manufacturing or assembly process. damage, resulting in a decline in the assembly yield of the backlight module 1

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