Fudan University: Light Diffusion Coating Helps New Life of LED Light Sources

Prof. You Bo from Fudan University's Department of Materials Science has conducted extensive research on the characteristics of various materials. Recently, through the unremitting efforts of the scientific research team, a new type of material, light diffusion coating, has been developed. It has good transparency (transmittance of the film >90%), good heat resistance, convenient construction, and can effectively solve the problem of glare and low light output efficiency of the LED light source.

The history of human light has developed rapidly in the past one hundred years. From kerosene lamps to incandescent lamps, from energy-saving lamps to LED lamps, bright and light innovations make people's daily lives more convenient. Today, LED lights are the most advanced and most powerful technology. It has been applied to ordinary lighting, backlighting, new energy automotive lighting, rail transit lighting, etc. It has great potential and is a well-deserved “future light source”.

Thin film light "future light source"

There are still many imperfections in LED, and one of the most deadly drawbacks reflected in daily life is the characteristics of its point light source. When the LED lamp emits light, it will produce strong light spots, and it cannot be directly viewed with the eyes. If the LED light source has been living around the high-brightness LED light source, the strong light spot formed by the LED light source will instantaneously affect the visual judgment. Eye discomfort and fatigue can occur in the short term, and permanent damage can occur even after long-term use.

In order to avoid the light pollution hazard caused by LED, Prof. Yu’s light diffusion film uniformly converts the LED light source into a surface light source, so that the light is diffusely reflected, so as to achieve uniform light effects, so that the overall light source is more uniform and soft. ,full.

Small film application

The light diffusion film can not only improve the utilization of the LED light, increase the brightness of the LED, but also reduce the use of the lamp. Once the number of tubes is reduced, the power consumption of the liquid crystal screen and the generation of heat energy are greatly reduced, which is helpful for green environmental protection. LED light diffusion coating, can replace the current use of the diffusion film, used to eliminate glare and point light source problems of LED devices, can be used for outdoor streetlights and traffic lighting, large-size LCD panels and notebook computer backlight, architectural decorative lighting, automotive Use lighting, home lighting, etc.

The newly developed light diffusion material has a very considerable market prospect and economic benefits. It has been widely used in the field of lighting and display, such as backlights, transmissive screens, lighting fixtures, lighting signs, etc., for liquid crystal displays.

As China's independent research and development of scientific and technological achievements, this project has applied for two Chinese patents for inventions and has become an important step in China's LED development path to get rid of material import dependence. Times reporter Bai Yu/report

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