Backlight module

Abstract

A backlight module comprises a light source, an optical film assembly and a secondary optical module. The light source comprises at least one circuit board and a plurality of LED (light-emitting diode) chips arranged on the circuit board. The optical film assembly faces the light source and is perpendicular to a first direction. The secondary optical module is made of transparent molecular material and arranged between the light source and the optical film assembly, and comprises a plurality of blocky light-splitting bodies and a plurality of strip-shaped light guide bodies. The light-splitting bodies respectively correspond to one LED chip, each light-splitting body is provided with a recess, the opening of which is aimed at the optical film assembly, and moreover, the cross section of the recess is gradually reduced along a direction close to the corresponding LED chip. The strip-shaped light guide bodies are respectively connected with the sides of the light-splitting bodies. The backlight module has the advantage that the secondary optical module arranged between the light source and the optical film assembly is utilized to split light, so that light can uniformly enter the optical film assembly, and thereby the quantity of the LED chips or the optical film assembly in use is reduced.

Description

technical field [0001] The invention relates to a backlight module, in particular to a direct type backlight module. Background technique [0002] With the advancement of technology, liquid crystal panels are widely used in today's life, such as mobile phones, notebook computers, personal computers and televisions and other electronic products. However, since the liquid crystal panel itself does not emit light, a backlight module is generally used to provide a light source for the liquid crystal panel to achieve the display effect of the liquid crystal panel. [0003] Generally, backlight modules can be divided into two types, one is a direct-type backlight module usually used for large-size liquid crystal panels, and the other is an edge-type backlight module usually used for small-size liquid crystal panels. [0004] figure 1 It is a schematic diagram of a conventional direct-type backlight module 1 , which includes a reflector 11 , a light source 12 and an optical film ...

AI Technical Summary

Problems solved by technology

[0005] However, under this existing structural design, for the sake of cost and thinning, measures such as reducing the number of optical films or LED chips are often adopted, so MURA phenomenon (uneven brightness emitted by the backlight module) is prone to occur.

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