Light dispersing element, backlight module and LCD device

Abstract

The invention provides a photodiffusion element, a backlight module and a liquid crystal display, wherein, the photodiffusion element is provided with a light incidence surface and a light leaving surface. The light leaving surface is provided with at least one light scattering pattern, wherein, the track of the light scattering pattern is a continuous curve. The continuous curve orderly winds on the light leaving surface to form a plurality of closed graphs, and two adjacent closed graphs are partially overlapped. By producing at least one light scattering pattern on the photodiffusion element, the invention ensures that the photodiffusion element can provide evener and higher-luminance leaving light when the photodiffusion element is matched with a light source to use. Therefore, the adoption of the backlight module of the photodiffusion element can reduce the service quantity of optical films so as to save cost and reduce the assembly thickness. Similarly, the liquid crystal display adopts the backlight module, which can improve the display quality, save the production cost, and conform to the design aims of lightness, thinness, shortness and smallness.

Description

technical field [0001] The present invention relates to the technology and application of an optical element and a light source module, and in particular relates to a light diffusion element, a backlight module and a liquid crystal display. Background technique [0002] Liquid crystal displays (LCDs) have the advantages of thin thickness, high image quality, low power consumption, and no radiation, and gradually become the mainstream of Flat Display Apparatus (FDA). Generally speaking, a liquid crystal display is composed of a backlight module and a liquid crystal display panel. Since the liquid crystal display panel is a non-self-luminous panel, the backlight module needs to provide a uniform surface light source to the liquid crystal display panel to display images. [0003] Generally speaking, in order to provide a uniform surface light source for the backlight module, several diffusion plates are usually used to diffuse the point or linear light sources disposed in the ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods are not easy to form a relatively concentrated light pattern, which leads to insufficient luminance of the surface light source provided by the backlight module. Therefore, it is necessary to add optical films such as brightness enhancement films to improve the light quality, but it also relatively increases the production of backlight modules. cost

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