Light guide plate, backlight module and liquid crystal display device

Abstract

The invention relates to the technical field of liquid crystal display, and provides a side type backlight module. The backlight module comprises a light guide plate, and one or more positioning grooves which are formed in the edge of the light guide plate, wherein a light-proof ink layer is arranged on the inner wall of each positioning groove. According to the technical scheme disclosed by the invention, a part of the light, irradiating to the areas of the positioning grooves of the light guide plate, of a light source is absorbed through the ink layers arranged on the inner walls of the positioning grooves, and the other part of the light is scattered uniformly, so that the intensity and the concentration degree of the reflected light are reduced; therefore, the light in the areas of the positioning grooves is prevented from being concentrated intensively, and the phenomenon of bright spots of the positioning grooves is avoided. Only the ink layer is prepared on the existing light guide plate, so that the structure and the preparation process of the existing light guide plate are not greatly influenced; the product performance is improved without prolonging preparation time and increasing the cost; the yield is ensured.

Description

[0001] This application is a divisional application of the Chinese invention patent application CN201210139173.2 filed on May 07, 2012 with the title of "light guide plate, backlight module and liquid crystal display device". technical field [0002] 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 [0003] 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 ...

AI Technical Summary

Problems solved by technology

[0008] 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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