Optical film, backlight module and display device

Abstract

The invention provides an optical film, a backlight module, and a display device. The incident light is reflected and transmitted through a recessed structure on a second surface, thereby reducing thebrightness of a light source placement region; the light rays reflected into a base film is transmitted in the base film, and the light rays incident onto a network point structure are scattered by means of the network point structure in a non-light-source placement region on the first surface and are emergent from a region other than the recessed structure on the second surface, thereby improving the brightness of the non-light-source placement region, being capable of forming a uniform surface light source, reducing the light mixing height of a directly-down light source, eliminating the light shadow, improving the light effect, realizing the ultra-thinness of directly-down backlight, improving the light utilization rate, and reducing the power consumption of the directly-down light source.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an optical film, a backlight module and a display device. Background technique [0002] The backlight of liquid crystal display is divided into side-type and direct-type. In the side-type backlight, the LED emits light from the side, and forms a uniform surface light source through the structure of the light guide plate and the reflector. In the direct-lit backlight, LEDs form a surface light source directly in an array. The current direct-lit backlight mainly uses miniLEDs, which have the advantage of realizing high dynamic range display (HDR). However, the main problem of the direct-lit backlight is the light shadow of the miniLED array. . [0003] At present, in the field of large-scale displays such as TVs or monitors, the method of eliminating light shadows is to add lens packages to each miniLED to increase the light divergence angle of the miniLED, and at the same time i...

AI Technical Summary

Problems solved by technology

For small-sized displays such as mobile phones, the size of mini LEDs ranges from a few hundred microns to several millimeters, and the cost of mounting micro-lenses is very high. The method to eliminate light shadows is mainly to increase the light mixing distance and add multiple diffusion films, which also cause module thickness. increase, which cannot meet the user's demand for ultra-thin fuselage, and the multi-layer diffusion film will cause a large optical loss

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