Backlight module and liquid crystal display device

Abstract

A backlight module comprises an optical part and a plastic frame; the plastic frame is arranged around the optical part, the optical part comprises an optical membrane set, the edge of the optical membrane set is provided with a plurality of lugs, the plastic frame is provided with locking slots that receive the lugs, the backlight module also comprises fasteners each having a first connecting end and a second connecting end, the first connecting ends are fixedly connected with the plastic frame, and the second connecting ends are connected with the lugs; each fastener comprises a first side portion and a second side portion arranged side by side along its length direction, and the first side portion and the second side portion are connected in a mutually attached manner; the first side portions are close to the inside of the backlight module, and thermal expansion coefficient of a material made into the first side portions is greater than that of a material made into the second side portions. The fasteners of the backlight module can effectively prevent the optical membrane set from warping and can also prevent the optical membrane set from jumping off from the locking slots of the plastic frame, thus improving the quality of a product.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a liquid crystal display device. Background technique [0002] The liquid crystal display device includes a backlight module, a liquid crystal panel and a front frame, wherein the backlight module includes a backplane, an optical component and a plastic frame, the optical component is arranged on the backplane, and the plastic frame is also arranged on the backplane and surrounds the optical component. For carrying the liquid crystal panel, the liquid crystal panel is arranged on the plastic frame, and the front frame and the back plate of the backlight module are engaged with each other to fix and combine the backlight module and the liquid crystal panel. Among them, the optical components are generally composed of a light source, a reflector, a light guide plate, and an optical diaphragm group. The reflector, the light guide plate, and the ...

AI Technical Summary

Problems solved by technology

The liquid crystal display device must not only withstand high temperature and high humidity test conditions, but also withstand relatively severe vibration conditions. When the ear part 144 of the optical film group 143 is semi-fixed, the ear part 144 on the semi-fixed side is left and right in the slot 161 Sliding is easy to jump out and cause the optical film set 143 to shift, which in turn causes the liquid crystal panel above the optical film set 143 to be crushed, or the optical film set 143 itself is scratched

Images