Backlight module and display device including backlight module

Abstract

The invention is applied to the technical field of backlight, and provides a backlight module and a display device. The backlight module includes a light guide plate provided with an incoming surface and an outgoing surface, as well as a plurality of light sources opposite to the incoming surface, wherein inverted cone-shaped cavity structures in one-to-one correspondence with the LED light sources are arranged in the light guide plate, and are provided with reflecting layers on the surfaces facing to the outgoing surface. According to the invention, as the cavity structures are arranged in the light guide plate, the straight downwards incident light is converted into lateral incident light, the thickness of the light guide plate is reduced, light spots formed by the fact that light rays emit out of the light guide plate via the space above the cavity structures are greatly reduced and even avoided, the backlight module integrates the advantages that the traditional lateral light type module is thin and the direct type module has better partition effect and uniform outgoing light, and effectively solves the problem that the conventional direct type and lateral incoming type backlight modules have nonuniform outgoing light.

Description

technical field [0001] The invention belongs to the field of backlight technology, and in particular relates to a backlight module and a display device including the backlight module. Background technique [0002] With its advantages of no pollution, good color rendering, energy saving, and long life, LEDs have gradually replaced CCFL (cold cathode fluorescent tubes) and become the mainstream backlight source. Existing LED backlight modules mainly include side-type and direct-type, the difference mainly lies in the position of the light source. The main advantage of the side-lit backlight module lies in the high optical efficiency of the system, and because the light source is located on the side of the light guide plate, its thickness can be made thinner than that of the direct-lit backlight module. Its disadvantage is that the backlight is arranged on the side, so that the number of partitions is greatly limited, especially for large-sized display panels, the uniformity o...

AI Technical Summary

Problems solved by technology

At the same time, it also brings some problems, that is, when the light rays that have been converted into side-light and totally reflected in the light guide plate 102 pass through the groove 103, part of the light is emitted at the groove 103 due to refraction, resulting in Uneven brightness occurs, such as figure 2 , image 3

Therefore, there is still no new type of module that can integrate the advantages of side-type and direct-type backlight modules into one body and avoid the above-mentioned problems in the prior art.

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