Backlight module

Abstract

The invention relates to a backlight module. The backlight module comprises a light guide plate and only one light source, wherein the light guide plate comprises a main body and a plurality of bulges; the main body comprises a light emitting surface, a light incidence surface, a first side surface and a second side surface; the light incidence surface is connected with the first side surface andthe second side surface at the same side of the light emitting surface; light incidence surface is connected with the first side surface and the second side surface; the included angles between the light incidence surface and the first side surface as well as the second side surface are obtuse angles; the first side surface and the second side surface are used for reflecting the light rays which are radiated to the surfaces, so as to prevent the light rays from being emitted out by the main body; the multiple bulges are arranged at the light incidence surface at equal intervals, and the lightsource faces the multiple bulges; the multiple bulges are used for diverging the light rays emitted by the light source, and guiding the light rays into the main body; the light emitting surface is provided with an effective light emitting area and an edge area around the effective light emitting area; the edge area comprises a light ray expanding area near the light incidence surface and the first side surface; the light rays which are radiated into the main body are reflected for multiple times in the light ray expanding area to enter the effective light emitting area, so that the light rayswhich are emitted out by the effective light emitting area are uniform.

Description

[0001] This application is a divisional application of a patent with the application number 201210474803.1, the application date is November 21, 2012, and the invention name is "backlight module". technical field [0002] The invention relates to a backlight module, in particular to a backlight module using only one light source. Background technique [0003] The light incident surface of the current light guide plate is generally relatively large, and the area that can be irradiated by a single light source is relatively small. In order to ensure that the brightness distribution of the effective light exit area of ​​the light exit surface of the light guide plate is uniform, multiple light sources must be installed on one side of the light incident surface. Consumes electricity. Contents of the invention [0004] In view of this, it is necessary to provide a backlight module that can evenly distribute the brightness of the effective light emitting area and can effectively...

AI Technical Summary

Problems solved by technology

[0003] The light incident surface of the current light guide plate is generally relatively large, and the area that can be irradiated by a single light source is relatively small. In order to ensure that the brightness distribution of the effective light exit area of ​​the light exit surface of the light guide plate is uniform, multiple light sources must be installed on one side of the light incident surface. Power consumption

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