LED lamp beads energy efficiency upgrade
On June 29, 2022, the Haixi Institute of Chinese Academy of Sciences (Fujian Institute of Materials Science, Chinese Academy of Sciences) released a research result of a transparent glass-ceramic fluorescent conversion sheet for chromaticity-tunable white LEDs, and has made 3 related inventions patent. It is reported that this research belongs to the key special projects of the National Key R&D Program of the Ministry of Science and Technology, the major special projects of science and technology in Fujian Province, and the major innovation projects of the Hercynian Research Institute of the Chinese Academy of Sciences.
As we all know, the LED chip packaging process not only requires the protection of the wick, but also the ability to transmit light. Therefore, the LED packaging process has special requirements for packaging materials. A good packaging can make the LED have better luminous efficiency and heat dissipation environment, and then Increase the service life of LEDs.
According to data, more than 90% of transistors and 70% to 80% of integrated circuits use plastic packaging materials, and epoxy resin packaging plastic powder is the most common plastic packaging material. The packaging material generally used for LED chips is transparent epoxy resin, which will denature and turn yellow at high temperature, which will affect its light transmission performance. The higher the working temperature, the faster this process will proceed.
LED chips want to emit white light, there are generally three ways to achieve: blue LED + YAG yellow phosphor, RGB three-color LED, ultraviolet LED + multi-color phosphor, the most widely used is blue LED + YAG yellow phosphor. However, due to the serious attenuation of the phosphor at high temperature, the service life of the white light emitted by the blue mixed phosphor is greatly affected. The industry refers to this phenomenon as light decay.
Research results are good for LED packaging performance
The research results of the Haixi Institute of Chinese Academy of Sciences (Fujian Institute of Physics, Chinese Academy of Sciences) successfully solved the problems of unstable performance of traditional phosphor/silica gel encapsulated white LEDs and non-adjustable chromaticity of fluorescent ceramic LEDs. Its main innovation is to use self-developed inorganic glass-ceramic phosphors with high luminous intensity, tunable chromaticity, and stable physicochemical properties to replace traditional phosphors/organic silica gels and fluorescent ceramics to construct high-power warm white LEDs, which significantly improves lighting applications. The physical and chemical properties and service life of warm white LEDs are stable. The relevant parameters of the LED light source packaged with the research results are very eye-catching. The white LED light efficiency constructed by it is > 120lm/W (lumens per watt), Ra > 80 (color rendering index), and the color temperature is 3000K-6000K. tune.
The research results also have the advantages of simple production process of transparent glass ceramic phosphors, green environmental protection, low cost, small project investment and quick results. The application prospect of its landing is also relatively broad, and it can be used for street lights, tunnel lights, spotlights, etc., and the scene with white LED lighting can be considered for replacement.
LED lighting helps the national double carbon policy
In addition, with the continuous implementation of the national "carbon peak carbon neutral" policy, various industries will face energy efficiency reforms. On June 29, 2022, the Ministry of Industry and Information Technology, together with the Development and Reform Commission, the Ministry of Finance, the Ministry of Ecology and Environment, the State-owned Assets Supervision and Administration Commission, and the State Administration for Market Regulation, jointly issued the "Industrial Energy Efficiency Improvement Action Plan" (Joint Section of the Ministry of Industry and Information Technology [2022] 76, hereinafter referred to as the Action Plan). The main goal of the Action Plan is that by 2025, the energy efficiency of key industrial sectors will be comprehensively improved, the energy efficiency of key areas such as data centers will be significantly improved, the proportion of green and low-carbon energy utilization will be significantly increased, and energy-saving and efficiency-enhancing technology and equipment will be widely used. The service and supervision system will be gradually improved, and the energy consumption per unit of added value of industrial enterprises above designated size will decrease by 13.5% compared with 2020.