Light guide plate capable of eliminating hot spot phenomenon and backlight module thereof

Abstract

The invention provides a light guide plate capable of eliminating hot spots and its backlight module. The light guide plate has a light incident surface and a number of spreading teeth. The light incident surface is used to receive light from at least one light source. The light incident surface, and the point light source corresponds to at least any three adjacent spreader teeth, so that the projected area of ​​the point light source on the light incident surface covers the aforementioned at least three adjacent spreader teeth. The surface roughness of each spreader tooth is greater than 0.9 μm, and the light from the point light source is first projected onto at least three adjacent spreader teeth, scattered through the spreader tooth structure, and at the same time passed through its surface roughness greater than 0.9 μm Diffuse due to the structure, thereby increasing the luminous angle of the light entering the light incident surface, thereby eliminating the hot spot phenomenon and improving the optical characteristics.

Description

technical field [0001] The invention relates to the field of light guide plates, in particular to a light guide plate capable of eliminating hot spots and a backlight module thereof. Background technique [0002] The light guide plate is an optical component used to guide light to form a surface light source, and is widely used in devices such as backlight modules or lamps. Taking the backlight module as an example, it can be divided into direct type and side type according to the relative position of the light source and the light guide plate. Thick direct-type backlight modules are gradually being replaced by edge-type backlight modules. In the side-lit backlight module, light-emitting diodes (hereinafter referred to as LEDs) as light sources are generally arranged at intervals on the side of the light guide plate, so that the light of each LED enters the interior from a light-incident side of the light guide plate, and is formed on the light guide plate. The surface lig...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the hot spot phenomenon will be formed near the light source in the light guide plate in the prior art, and provide a light guide plate and its backlight module that can eliminate the hot spot phenomenon. The structural design can effectively eliminate the phenomenon of uneven brightness and darkness, and improve the optical characteristics of the light guide plate

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