Backlight module

Abstract

The invention relates to a backlight module, in particular to a backlight module with a wave-shaped diffusion sheet, comprising a back plate and a wave-shaped diffusion sheet, wherein the wave-shaped diffusion sheet is arranged above the back plate. In addition, the backlight module can also comprise two side frames, wherein the two side frames are respectively provided with an upper surface and a lower surface. The backlight module can also comprise a plurality of light-emitting units which are ranged on the back plate. On the other hand, the wave-shaped diffusion sheet of the backlight module can be provided with a plurality of concave parts and a plurality of convex parts and placed on the upper surfaces of the two side frames. Finally, the light-emitting units can be arranged on the back plate relative to the concave parts of the wave-shaped diffusion sheet of the backlight module, and the lower surfaces of the two side frames can be embedded with the light-emitting units.

Description

technical field [0001] The invention relates to a backlight module, in particular to a backlight module with a wavy diffusion sheet. Background technique [0002] See figure 1 , which is a three-dimensional schematic diagram of an existing backlight module. The existing backlight module 1 includes: a backplane 11, a plurality of light-emitting units 12, two side frames 131, 132, a diffusion plate 14, a diffusion sheet 15 and a plurality of support unit 16. Wherein, the back plate 11 has a bottom plate 111 and two side plates 112, 113 extending from the bottom plate 111; these light emitting units 12 (I-type lamp tubes) are arranged above the bottom plate 111; the two side frames 131, 132 are respectively arranged on The edge of the bottom plate 111 is combined with the two side plates 112,113, and the two side frames 131,132 have an upper surface 133,134 and a lower surface (not shown in the figure) respectively, and the two upper surfaces 133,134 are plane , and the two ...

AI Technical Summary

Problems solved by technology

However, under the premise that the size of the light-emitting surface of the backlight module remains unchanged, the reduction in the number of lamps means that the distance between the lamps increases, resulting in a significant decrease in the brightness uniformity of the backlight module (that is, Lamp Mura). side effect

Moreover, several methods currently used in the industry to solve the phenomenon of a large decrease in luminance uniformity, such as increasing the thickness of the backlight module or using a diffuser plate with a higher haze, each have their own disadvantages. For example, the backlight module The inability to reduce the thickness of the group, the increase in material costs, or the reduction in the utilization efficiency of light sources have caused many problems in the industry.

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