Backlight module and optic plate thereof

Abstract

The invention provides an optic plate, which consists of a transparent body. The transparent body comprises a first surface and a second surface opposite to the first surface, wherein the first surface is provided with a plurality of strip arc grooves; the second surface is provided with a plurality of strip arc bulges; and the extending direction of the plurality of the strip-arc bulges on the second surface is parallel to that of the plurality of the strip-arc grooves on the first surface. The optic plate has the advantages of improving the utilization rate of optical lines and emitting light evenly. The invention also provides a backlight module applying the optic plate.

Description

Technical field [0001] The present invention relates to a backlight module and its optical plate, in particular to a backlight module and its optical plate for liquid crystal display. Background technique [0002] See figure 1 versus figure 2 , Shown is an existing direct-lit backlight module 100, which includes a frame 11 and a plurality of light sources 12 arranged inside the frame 11, a diffuser 13 arranged above the light source 12 and covering the frame 11 and A prism sheet 10. Among them, the diffuser 13 generally contains scattering particles to diffuse light. The prism sheet 10 includes a transparent substrate 101 and a prism layer 103 formed on the transparent substrate 101. The prism layer 103 has a plurality of elongated V-shaped protrusions 105. [0003] When in use, the light generated by the multiple light sources 12 enters the diffuser plate 13 and is evenly diffused, and then continues to enter the prism sheet 10, and under the action of the long V-shaped protru...

AI Technical Summary

Problems solved by technology

However, when the light is transmitted in the upper diffusion sheet 14, part of the light will be absorbed by the upper diffusion sheet 14 and cause part of the light loss; and the use of the upper diffusion sheet 14 will also increase the number of interfaces in the transmission process of the light, thereby increasing the light transmission. Therefore, the use of the upper diffusion sheet 14 will reduce the utilization rate of light and reduce the brightness of the backlight module 100.

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