Diffuse reflection type reflective film and preparation method thereof

Abstract

The invention, which belongs to the technical field of optical films, in particular relates to a diffuse reflection type reflective film and a preparation method thereof. The diffuse reflection type reflective film is composed of a core layer and a surface layer or surface layers arranged at one side or two sides of the core layer. Each surface layer includes the following components: 80 to 90 parts of polyester resins, 5 to 15 parts of scattering particles, and 5 to 8 parts of antistatic agents. The preparation method of scattering particles is implemented as follows: an acid solution is added into a mixture of quartz powder and mica powder; after uniform mixing, the mixture is added into a jet device and thus accelerated processing is carried out; drying is carried out; and then a laserbeam is used for irradiation to obtain scattering particles. According to the invention, the surface layer of the reflective film is filled with scattering particles and the scattering particles are formed by insertion and welding of mica powder on the surface of the quartz powder, so that the excellent light scattering performance is realized. Therefore, the prepared reflective film has the excellent light scattering performance and is suitable for a short OD backlight module group with a good dodging effect, so that problems of light shadow existence and surrounding shadow existence are solved.

Description

technical field [0001] The invention belongs to the technical field of optical films, and in particular relates to a diffuse reflective reflective film and a preparation method thereof. Background technique [0002] In view of a series of advantages such as thin plane, light weight, low power consumption, low voltage operation, and no radiation, liquid crystal display has always been the mainstream flat panel display technology in the market. Different from the OLED technology that can realize self-illumination in the existing technology, liquid crystal display still depends on the backlight module to provide light, and the quality of light is quite important for the performance of liquid crystal display. Backlight modules can be divided into side-type and direct-type according to the position of the light source; the light source of the side-type backlight module is on the side, which has the advantage of thinner module thickness, while the light source of the direct-type b...

AI Technical Summary

Problems solved by technology

When the traditional reflective film is used in the short OD backlight module, it is easy to appear light shadows and dark shadows around. It is difficult to form a uniform picture even if it is covered with two diffusion films for uniform light

And this kind of uneven picture phenomenon is not allowed to appear in the backlight module

[0004] As a countermeasure to solve the uneven phenomenon in the short OD backlight module, there is also a way to coat the diffusion particles on the surface of the reflective film. However, this coating method increases the process of preparing the reflective film, which is time-consuming and labor-intensive;

[0005] There are also manufacturers of backlight modules to improve lamp shadows and surrounding shadows by redesigning the number of lamps and the distance between lamps. This design change is nothing more than reducing the shadow phenomenon by increasing the number of lamps, but this method is not only in The cost control cannot meet the requirements, and the energy consumption requirements of the backlight module cannot be met.