Optical sheet, backlight module with same and liquid crystal display device

Abstract

The invention relates to an optical sheet, a backlight module with the same, and a liquid crystal display device. The embodiment of the invention provides an optical sheet, and the optical sheet comprises a prism sheet support part, a base, a prism-shaped part and an adhering layer, the prism sheet support part, the adhering layer, the base and the prism-shaped part are sequentially laminated from the bottom up, and the adhering layer is formed by an adhesive and vacuum balls randomly distributed in the adhesive. Therefore, the difference of refractive indexes of the interiors and the surfaces of the vacuum balls in the optical sheet disclosed by the embodiment of the invention is enough large so that the diffusion effect of the optical sheet can be improved; the optical sheet not only has a light collecting function, but also has an excellent diffusion function, thus the optical sheet can be taken as a composite optical sheet. If the optical sheet of the embodiment of the invention is applied to a liquid crystal display device, the optical sheet has both light collecting function and diffusion functions, thereby improving the diffusion of lights transmitted to an LCD (Liquid Crystal Display) board and increasing the brightness of the LCD board. Furthermore, the optical sheet has the diffusion function, thus a diffusion sheet does not need to be provided, and the manufacturingcost is saved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to an optical sheet, a backlight module with the optical sheet, and a liquid crystal display device. Background technique [0002] Today, liquid crystal display devices (Liquid Crystal Display device, LCD) have widely replaced traditional display devices, and backlight modules (Back Light Unit, BLU) are components that provide light sources in liquid crystal display devices. To a large extent, it determines the display quality of liquid crystal display devices. [0003] The backlight module can be divided into two types according to the different installation methods of the light source: the direct-type type in which the light is arranged under the liquid crystal panel, and the side-in type in which the light is arranged on the side of the light guide plate. [0004] Such as figure 1 Shown is a cross-sectional view of a backlight module of a liquid crystal display d...

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Problems solved by technology

[0010] However, because the brightness drops sharply in the process of passing through the diffusion sheet 141, even if the prism sheet 142 is used in the backlight module, its ability to improve the brightness of the light is still very limited, thereby causing the display quality of the liquid crystal display device to remain to be determined. improve

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