Backlight module and light guide plate thereof

Abstract

The invention relates to a backlight module which comprises a light source and a light guide plate, wherein the light guide plate comprises a first wedge-shaped block and a second wedge-shaped block which are opposite; the first wedge-shaped block and the second wedge-shaped block respectively comprise an incident surface as well as an emergent surface and a reflecting surface which respectively extend out of two opposite sides of the incident surface; the reflecting surface and the emergent surface of the second wedge-shaped block are intersected; the first wedge-shaped block also comprises a combined surface which is formed between the reflecting surface and the emergent surface of the first wedge-shaped block; the combined surface is inclined relative to the emergent surface of the first wedge-shaped block and connected with the reflecting surface of the second wedge-shaped block; and the light source is opposite to the incident surfaces of the first wedge-shaped block and the second wedge-shaped block. Because each light guide plate is formed by combining a plurality of wedge-shaped blocks with smaller size, the design and moulding are easier, and the cost is lower; in addition, because the sizes of the wedge-shaped blocks are smaller, and the stress distribution of the wedge-shaped blocks are uniform, bending deformation can be prevented, and the light guide uniformity is improved.

Description

technical field [0001] The invention relates to a backlight module, in particular to a light guide plate used in the backlight module. Background technique [0002] Since the liquid crystal in the liquid crystal display panel itself does not have luminous properties, in order to achieve the display effect, it is necessary to provide the liquid crystal display panel with a light source device, such as a backlight module. [0003] The existing backlight system mainly includes a light source and a light guide plate. The function of the light guide plate is to guide the transmission direction of the light emitted by the light source, thereby improving the brightness and uniformity of the liquid crystal display panel. However, as liquid crystal display panels are increasingly used in large-size information equipment, it is necessary to provide large-size backlight modules to match them. However, the light guide plate is mainly made by injection molding. The larger the size of th...

AI Technical Summary

Problems solved by technology

However, the light guide plate is mainly made by injection molding. The larger the size of the light guide plate, the more difficult the injection molding is, and the development of large-size injection molding equipment requires high cost. On the other hand, the increase in the size of the light guide plate It often leads to uneven stress distribution and bending deformation, which seriously affects the uniformity of light output

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