What is the principle of LED diffuser plate? How is the LED diffuser applied?

  LED diffuser is a chemical or physical method that uses the physical imagination of refraction, reflection and scattering when light encounters two media with different refractive indices on the way. Add inorganic or organic light diffusing agents to the base, or artificially adjust the light through the array arrangement of micro-features on the surface of the substrate, so that the light can be refracted, reflected, and scattered in different directions, and then change the travel path of the light to complete the incident light charge. The diffused color acts as an optical diffuser, and the LED diffuser plate is widely used in liquid crystal display, LED lighting and imaging display systems. The following editor will introduce the principle of LED diffusion plate and how to use LED diffusion plate?

What is the principle of LED diffuser

1. Traditional LED diffuser

The traditional LED diffuser plate mainly uses chemical particles as scattering particles in the base material of the LED diffuser plate, so that the light is continuously refracted, reflected and scattered in two media with different refractive indices when passing through the scattering layer. The role of optical diffusion. However, in this method, the absorption of light by diffused particles will inevitably exist, resulting in a low utilization rate of light energy.

Commonly added chemical particles include: organic light diffusing agent, inorganic light diffusing agent, mixing uniformity

LED Diffuser

2. Microstructure LED diffuser

The micro-structured LED diffuser is an array of micro-featured structures on its surface, which makes the light refracted in different directions when passing through, changes the light's travel route, completes the filling and diffused color of the incident light, and achieves a softer and more uniform illumination. Common micro-specialty structures include the following:

A.V groove array

B.U-shaped convex groove array

C. Pyramid Array

D. Torus array

E. Microlens Array

The microstructure LED diffuser has high transmittance. By changing the shape and different arrangement of the microstructure, the diffusion viewpoint, the space and energy distribution of the light field can be adjusted, and the effect on the uniformity and transmittance of the light diffuser can be completed. Therefore, the microstructure LED diffuser plate has attracted great attention of researchers.

How to apply LED diffuser

LED diffuser is widely used in liquid crystal display, LED lighting and imaging display systems. Its main function is to diffuse the incident light to achieve a softer and more uniform illumination.

A, LED diffuser is used in liquid crystal display system

Applied to the direct-lit backlight system selected for LCD TVs, the LED diffuser plate has outstanding functions such as heat resistance, dimensional stability, mechanical strength, flame resistance, etc., and has high light transmittance, excellent shading and durability. To make its light diffusion to the best condition, it is most suitable for direct type backlight unit.

B. LED diffuser is applied to LED lighting

Requirements of LED diffuser for LED lighting:

1. The best diffusion function: high light softness

2. High light transmission function: reduce energy consumption and improve the illumination of lamps

3. Influence on the light source: adhere to the consistency of the color temperature of the light source