Light guide plate, backlight module and liquid crystal display device

Abstract

The invention relates to the technical field of a liquid crystal display and provides a light guide plate, a backlight module and a liquid crystal display device. The light guide plate comprises at least one positioning groove arranged at the edge of the light guide plate, wherein a non-transmitting ink layer is arranged on an inner wall of the positioning groove. According to the technical scheme provided by the invention, one part of light irradiated to an area of the positioning groove of the light guide plate by a light source is absorbed by the ink layer arranged at the inner wall of the positioning groove, and the other part of the light is uniformly scattered, so that the intensity and the concentration ratio of light reflection can be reduced. Therefore, no condition that the light in the area of the positioning groove is excessively concentrated exists, and a bright spot phenomenon of the positioning groove is eliminated. According to the technical scheme provided by the invention, only one ink layer is additionally manufactured in the conventional light guide plate, so that no great influences on the structure and the manufacturing process of the conventional light guide plate exist. Therefore, the product properties can be improved without increasing manufacturing time and cost; and the yield is ensured.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a light guide plate, a backlight module and a liquid crystal display device. Background technique [0002] Since the liquid crystal panel itself cannot emit light, the existing liquid crystal display devices generally require a light source to provide light for display. The backlight of early liquid crystal display devices is usually direct type, that is, a CCFL (Cold Cathode Fluorescent Lamp) or LED light source is provided on the back of the liquid crystal panel, and the light emitted by the light source is directly irradiated on the liquid crystal panel. Although the direct type is easier to realize, and the brightness and quality of the backlight can be guaranteed, but because the backlight is distributed on the back of the LCD panel and must be kept at a certain distance, the thickness of the display device cannot be further reduced, and it cannot keep up with...

AI Technical Summary

Problems solved by technology

[0007] In view of the above shortcomings, the present invention provides a light guide plate, a backlight module and a liquid crystal display device in order to solve the problem of bright spots in the positioning groove in the prior art.

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