Material characteristics and application scope of light diffuser

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With the promotion of the integrated ceiling industry, flat panel lights gradually penetrate into the lighting industry and become popular in the south of the Yangtze River

North, even going global, gradually replacing grille lighting fixtures with its distinctive features such as ultra-thin, ultra-bright, uniform and no flicker.

This trend is accompanied by the development of new products, expanding to a wider area.

Mainly used light diffusion materials for LED flat lights

Has also become hot.

Currently, the materials of light diffuser mainly include

PMMA, PC, PET, etc., but this only determines the effectiveness of the diffuser

One of the criteria for judging the pros and cons of a fruit. The different types of integrated LED light sources and the different distances between the light source and the diffuser plate are the basis for selection. If subdivided in this way, plus the difference in material and thickness,

There are dozens of diffusion plate matching solutions, especially in a market with complex levels such as Zhongshan, where various measurement standards are more difficult to unify. The most used at this stage is

PC material, as to why PS material is the favorite of major flat light manufacturers, I will decrypt it for you one by one later! The basic concept of PC light diffuser: the light diffuser is the light passing through

When the diffusion layer of PC/PMMA/PS and other substrates encounters a medium (diffusion particle) with a different refractive index, the phenomenon of multi-angle and multi-directional refraction, reflection and scattering will occur, so as to achieve

The light diffusion effect provides a uniform surface light source for the display lighting assembly.

The background of the light diffusion plate: In the process of LED lighting being gradually accepted by the market, the problem of lampshades has been plagued by lamp manufacturers. It is necessary to have a high light transmittance as a prerequisite, but also to have a considerable light diffusion rate and good light source concealment. The glass was originally used to produce lampshades. The problem with glass was that it was fragile and diffused.

The effect is not very good, it is difficult to meet the lighting requirements and use it immediately. Later, it gradually developed to use resin instead of glass.

If only transparent resin is used for the lampshade, although the light transmittance is very high, it can basically reach

More than 90%, but the light scattering effect is not ideal, and the light source concealment performance is poor. The whiteboard resin has too low light transmittance, which seriously affects the lighting of the LED lamp.

Theoretical basis: When light is emitted from one medium to the smooth interface of another medium, part of the light is reflected by the interface,

Another part of the light passes through the interface and refracts in another medium. The incident angle of the light is equal to the reflection angle, and the reflected light and the incident light

On both sides of the normal in the same plane, this is the law of reflection. The refracted light conforms to the law of refraction: the position of the refracted light

In the plane of the incident light and the normal, the refracted light and the incident light are on both sides of the normal, and the ratio of the incident angle to the sine of the refraction angle

Is a constant. Both the law of refraction and the law of reflection are the foundation of geometric optics. They are not only in theoretical research, but also laid a foundation for the development of optical technology and the design of optical products.