Optical film, backlight module comprising same and display device

Abstract

The invention provides an optical film, a backlight module comprising the same and a display device. The optical film comprises a polarizing film and a diffusing film, wherein the polarizing film is used for converting incident light into polarized light and then emitting the polarized light; the diffusing film is arranged on the emergent surface of the polarizing film, and comprises scattering particles capable of forming Rayleigh scattering. The backlight module comprises an optical film and a light source; the light source is arranged on one side, away from the diffusing film, of the polarizing film. According to the optical film provided by the invention, the problems that the conventional diffusing film cannot be thinned, has a poor light uniformizing effect and causes brightness lossare solved; the polarizing film can convert the incident light into the polarized light and then emit the polarized light, so that the light coming into the diffusing film is the polarized light; thescattering particles in the diffusing film can diffuse the polarized light emitted from the polarizing film, so that the light uniformizing effect is enhanced and the brightness after diffusion is enhanced; the optical film is small in thickness; the backlight module facilitates reduction in the light mixing distance; the light uniformizing effect is enhanced; the overall brightness of the moduleis improved; thinning of a product is facilitated.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an optical film, a backlight module with the same and a display device. Background technique [0002] Due to the consideration of cost and power consumption, the number of light-emitting diodes (LEDs) in direct-lit backlights is limited to a certain extent, and the arrangement of LEDs has a certain distance. Therefore, the backlight needs to use uniform light technology to eliminate the LED light shadow, usually by using a diffusion film or a diffusion plate for uniform light, but because the thickness of the diffusion plate is relatively thick, it is not conducive to the trend of thinning the product. The traditional diffusion film is basically based on the principle of Mie scattering or the principle of geometric optics to realize the diffusion of light. There are problems that the thickness of the product cannot be reduced, the effect of uniform light is not good, and the bri...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides an optical film, a backlight module with it and a display device, which are used to solve the problems that the thickness of the traditional diffusion film cannot be reduced, the light uniformity effect is poor, and the brightness loss is caused.

Images