Backlight module

Abstract

The invention discloses a backlight module which comprises a back plate, a light guide plate, a plurality of optical diaphragms and a clamping device, wherein the light guide plate is arranged in a region surrounded by the edge structures of the back plate; the optical diaphragms are arranged on the light guide plate; the clamping device comprises a supporting part, a clamping piece and a buffer part; the supporting part is bulged out of the back plate; the clamping piece is arranged on the supporting part and extends from the back plate toward the optical diaphragms; and the buffer part is arranged between the clamping piece and the optical diaphragms.

Description

technical field [0001] The present invention relates to a clamping device, and in particular to a clamping device arranged on a backlight module. Background technique [0002] In liquid crystal displays, cold cathode fluorescent tubes (Cold Cathode Fluorescent Tube, CCFT) or light emitting diodes (Light Emitting Diode, LED) are generally used as light sources, and then the light emitted by the light sources is guided to the display screen through the light guide plate. In order to prevent the uneven brightness of the liquid crystal display, it is necessary to use an optical film to make the brightness of the entire screen uniform, and to maintain the brightness of the entire screen without compromising the brightness of the light source. In the current backlight module, optical films such as diffusers are mainly used to achieve uniformity and concentration of light. [0003] However, these optical films are prone to scratches when the backlight module or liquid crystal disp...

AI Technical Summary

Problems solved by technology

[0003] However, these optical films are prone to scratches when the backlight module or liquid crystal display is subjected to vibration tests. Therefore, the existing methods to avoid scratches on the optical films are mostly to place the optical films above the light guide plate in a hanging manner. to reduce optical diaphragm movement, however this has limited effect

There is also a liquid crystal display module that uses light-emitting diodes as light sources and has thinner features. The optical film and the light guide plate (or between the optical films) are closer, which is more likely to cause scratches

[0004] In addition, if the optical film is completely fixed, such as by adhesive fixation or restricted by structure, it is easy to cause wave-like problems on the optical film due to uneven force, which further reduces the optical performance of the backlight module.

Images