Back light source structure

Abstract

The invention discloses a backlight structure which comprises a lamp reflector, a reflecting membrane and a light guide plate, wherein, the light guide plate consists of an upper layer light guide plate and a lower layer light guide plate; the lower surface of the lower layer light guide plate is provided with concave or convex microstructure and opposite to the reflecting membrane as the lower surface of the light guide plate; a plurality of beam-focusing diffused high polymer particles are dispersed inside the upper layer light guide plate; a V-shaped, U-shaped, semicircle or arc light incidence plane is formed at a position close to the lamp reflector by the upper layer light guide plate and the lower layer light guide plate. The angle between the light incidence plane of the light guide plate and the bottom surface of the light guide plate is an acute angle instead of a right angle; therefore, the light incidence direction can be changed so as to improve light effect; moreover, as the space of a lamp room is increased and heat dissipation capability is strengthened, the phenomena that the light guide plate is curved and the optical membrane is warped when the light guide plate is heated can be reduced to a great extent.

Description

technical field [0001] The invention relates to a backlight source module of a liquid crystal display, in particular to a light guide plate structure in the backlight source module. Background technique [0002] In the backlight of liquid crystal display, one of the most important components is the light guide plate. figure 1 shown figure 1 It is a schematic diagram of the structure of the side light type backlight source (not including the optical film group) in the prior art. Such as figure 1 As shown, the basic structure of the backlight source in the prior art is composed of a lamp reflector 3, a reflective film 4, a light guide plate 7, a diffusion film, a prism film and a protective film (not shown in the figure), etc., wherein the diffusion film Optical film groups such as prism film and protective film can be combined in different ways according to the actual situation. Usually, the improvement of the brightness of the backlight mainly depends on the prism film, ...

AI Technical Summary

Problems solved by technology

However, this type of light guide plate is relatively expensive due to the injection molding process, so it is not widely used at present.

[0005] In addition, when the backlight is working normally, the temperature on the surface of the panel is generally about 35°C, and the temperature inside the backlight, especially near the lamp tube, will be higher, and there is a temperature difference between the electrode part of the lamp and the effective light-emitting area. , these are easy to cause different degrees of deformation of the optical film and the light guide plate

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