Light guide plate, preparation method of light guide plate and backlight module

Abstract

The invention provides a light guide plate, a preparation method of the light guide plate and a backlight module, the light guide plate comprises a first substrate and a gradual change microstructure arranged on the first substrate, and one surface, far away from the first substrate, of the gradual change microstructure is a light emitting surface S1 of the light guide plate; one surface, far away from the gradual change microstructure, of the first substrate is a bottom surface S2 of the light guide plate, and a light incident surface S0 is connected with the light emergent surface S1 and the bottom surface S2; and the gradually-changed microstructure gradually changes from sparse to dense along with the distance from the light incident surface S0. According to the light guide plate, the light-emitting surface of the light guide plate is impressed by the light-cured resin to form the gradual change microstructure, the visual angle can be converged, the brightness of a backlight module is improved, a certain privacy protection effect is achieved, and compared with an integrally-formed light guide plate, the light guide plate has more excellent scratch resistance. The invention further provides a preparation method of the light guide plate. The light guide plate has the advantages of being low in mold opening cost, higher in production and assembly yield and the like.

Description

technical field [0001] The invention relates to an optical element and a backlight module, in particular to a light guide plate, a preparation method of the light guide plate and a backlight module. Background technique [0002] Backlight modules are mainly divided into direct-lit backlight modules and side-lit backlight modules according to the location of the light source. Taking the side-illuminated backlight module as an example, it usually includes a light guide plate and a light source disposed on the side of the light guide plate. After the light emitted by the light source enters the light guide plate, the light will be confined in the light guide plate due to total reflection. [0003] In the known technology, the bottom surface of the light guide plate is a dot structure with varying densities to destroy the total reflection, and the light can be smoothly emitted from the light-emitting surface of the light-guide plate. structure. The upper surface of the light ...

AI Technical Summary

Problems solved by technology

[0004] At present, the improvement of the light guide plate is mainly focused on the bottom surface structure of the light guide plate, focusing on improving the light uniformity of the backlight module, while the light output surface of the light guide plate still adopts the injection-molded prism or lenti structure, because the light guide plate is mostly made of polycarbonate, etc. Plastic material, therefore, the scratch resistance is insufficient, and the production yield is low

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