Light guide plate and backlight module

Abstract

The invention relates to a light guide plate which comprises a light incident surface and a light emergent surface, wherein the light emergent surface is connected with the light incident surface, the light incident surface is provided with a plurality of V-shaped cutting slots recessed in the light incident surface, a Fresnel lens is arranged between the adjacent V-shaped cutting slots, and the extension direction of each V-shaped cutting slot is vertical to the light emergent surface. The invention also relates to a backlight module adopting the light guide plate.

Description

technical field [0001] The invention relates to a light guide plate and a backlight module, in particular to a light guide plate with uniform light output, high brightness and excellent optical performance and a backlight module using the light guide plate. Background technique [0002] Due to the advantages of lightness, thinness, and low power consumption, liquid crystal displays are widely used in modern information equipment such as notebook computers, mobile phones, and personal digital assistants. Since the liquid crystal itself does not have luminous properties, it is necessary to provide a backlight module for it to realize the display function. [0003] The existing backlight module includes a light source and a light guide plate. The light source is arranged relative to the light incident surface of the light guide plate. The light guide plate guides the propagation direction of the light beam emitted by the light source, and converts the point light source or line...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, in the backlight module 10 using LED as the light source, due to the limitation of the divergence angle of the LED light source 13, the area of ​​the light guide plate 17 close to the LED light source 13 has a bright column 11, and the area between the light guide plate 17 corresponding to the LED light source 13 There is no light beam passing through the part in between, so that the shadow area 15 appears. This phenomenon is called light column or dark band phenomenon, which reduces the light uniformity of the light guide plate 17.

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