Light guide plate

Abstract

The invention relates to a light guide plate. The light guide plate comprises a light incidence surface, a light emergence surface, a bottom surface arranged opposite to the light emergence surface and net points arranged on the bottom surface, the net points comprise a first curved surface and a second curved surface, and two flat surfaces located on the first curved surface and the second curved surface, the first curved surface reflects light incident thereto to the light emergence surface with an angle vertical to the light emergence surface, the second curved surface radiates light incident thereto back to the inside of the light guide plate, and the two flat surfaces reflect and radiate light incident thereto to two sides of an initial incidence path of the light incident to the flat surfaces. The light guide plate has the advantages of both having relatively good luminance and uniformity.

Description

technical field [0001] The invention relates to a light guide plate for a backlight system, in particular to a light guide plate with dot distribution. Background technique [0002] Since the liquid crystal itself of the liquid crystal display panel does not have light-emitting characteristics, in order to achieve the display effect, it is necessary to provide a surface light source device for the liquid crystal display panel, such as a backlight system, whose function is to supply a surface light source with sufficient brightness and uniform distribution to the liquid crystal display panel. The backlight system in the prior art is mainly composed of a light source and a light guide plate. The light source can be arranged on one side or two opposite sides of the light guide plate and emit light to the light guide plate. The function of the light guide plate is to guide the transmission direction of the light so that the light is evenly emitted from the light emitting surfac...

AI Technical Summary

Problems solved by technology

[0003] Since the light guide plate scatters the light as much as possible, the light transmitted through the light guide plate is scattered in various directions, which inevitably produces the defect of insufficient luminance due to the scattered light.

[0004] Usually, in order to overcome the defect of insufficient luminance, the light-emitting surface of the light guide plate is also provided with a prism plate. The refraction of the prism plate can converge the light directly in front of the light guide plate to improve the brightness of the light guide plate. However, this kind of prism plate The setting of the prism increases the number of components of the backlight system with a relatively complex structure, which is not conducive to the lightweight and thin design of the backlight system. Moreover, the light convergence effect of the prism may also cause the uniformity of the light guide plate to be unable to maintain, affecting the backlight system. quality

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