Light guide plate and backlight module

Abstract

Said light guide board includes one light income surface, one light out surface and one bottom surface, wherein said light income surface for receiving light to make it entering said light guide board, said light income surface set with plurality of mesh points, said light out surface intersected with said light income surface, said bottom surface being opposite with said light out surface, in said light income surface, the sum of mesh point size and mesh point interval being less than the shortest wavelength of visible light. Said light guide board can raise light transmission ratio and eliminate color deviation.

Description

【Technical field】 [0001] The invention relates to a light guide plate 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. Because the liquid crystal itself does not have light-emitting properties, it is necessary to provide a backlight module for it to realize the display function. [0003] The prior art 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 transmission direction of the light beam emitted from the light source, and converts the line light source or point light source into a surface light source to emit. [0004] A prior art light guide plate such as figure 1 As shown, the...

AI Technical Summary

Problems solved by technology

[0007] However, since the light emitted by the light source 220 is generally white visible light, the visible light has a wide band and contains multiple wavelength bands, and the size and spacing of the dots 213 are relatively small. Therefore, when the light emitted by the light source reaches the light incident surface of the light guide plate 210 211, when the incident angle is greater than 30°, the short wave in visible light will be diffracted and cause light loss, and the short wave is generally blue light

Due to the loss of blue light, the visible light shifts towards yellow, which will cause chromaticity deviation between the backlight module and the liquid crystal display device, and affect the display quality of the liquid crystal display device

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