Backlight module and liquid crystal display of backlight module

Abstract

The embodiment of the invention discloses a backlight module, which comprises a light guide plate, an optical film group and at least one positioning device, wherein the light guide plate is provided with a light inlet surface and a light outlet surface, a light source is arranged at the light inlet surface, the optical film group is arranged above the light guide plate and is opposite against the light outlet surface of the light guide plate, a foldable part extends from at least one side edge of at least one optical film of the optical film group, the positioning device is arranged at least one side surface of the light guide plate, except the light inlet surface, an accommodating space is formed between the positioning device and the side surface of the light guide plate, and the foldable part of the optical film is folded and is then accommodated into the accommodating space. The embodiment of the invention correspondingly provides a liquid crystal display adopting the backlight module. According to the embodiment of the invention, the positioning of each optical film of the optical film group is simple, the wave-shaped deformation of the optical film caused by heat expansion or cold shrinkage can be prevented, in addition, the application is wide, and the production cost is saved.

Description

technical field [0001] The invention relates to a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) technology, in particular to a backlight module and a liquid crystal display thereof. Background technique [0002] TFT-LCD has become a very important display platform in modern information technology and video products. Such as figure 1 As shown, a cross-sectional view of a liquid crystal display module is shown. The liquid crystal display module includes a liquid crystal display panel 2, a backlight module 1 and a supporting device. Wherein, the backlight module 1 is arranged behind the liquid crystal display panel to provide light to the liquid crystal display panel; the supporting device is used to support and fix the liquid crystal display panel and the backlight module. The support device includes a back plate 3, a plastic frame 1, and an annular glass plate 5 covering the plastic frame, so that the liquid crystal disp...

AI Technical Summary

Problems solved by technology

Then, in the above-mentioned existing liquid crystal display device, the platform is only supported by the support plate, and the distance between the edge of the optical film group and the support plate is limited, when the optical film group is under the heat from the light source, especially when receiving During high-temperature testing, it is easy to expand due to heat and cause insufficient space, resulting in waving deformation, affecting the picture effect of the liquid crystal display device, and even causing the optical film group to fall off

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