Therefore, aluminum nitride as LED heat dissipation substrate is more mature and generally accepted at the present stage. However, due to the limitation, alN substrate is not suitable for the traditional thick film process (the material must undergo atmospheric heat treatment at 850℃ after printing with silver glue, which causes the material reliability problem). Therefore, aluminum nitride substrate circuit needs to be prepared in thin film process. The aluminum nitride substrate prepared by thin film process greatly accelerates the efficiency of heat transfer from LED grains through substrate material to system circuit board, thus greatly reducing the heat transfer from LED grains through metal wire to system circuit board, thus achieving the effect of high heat dissipation. 0.32 inch 3411AG LED Common-Cathode CC 3411AG 7-Segment digit 3411BG Display 3411BG Common-Anode CA 0.32 inch 3141AG LED Common-Cathode CC 3141AG 7-Segment digit 3141BG Display 3141BG Common-Anode CA In addition to lighting, LED is also widely used in computer, TV, mobile phone and many electronic products screen. Based on the working principle of LED light source, in theory, the light source should produce more blue light or ultraviolet light when it is used. Long-term and excessive use may cause eye damage. It has been seen that whether the harmful light produced by LED light source has an impact on eye health is currently attracting much attention. Common-Cathode CC 5101AS LED 5101AS 0.50 inch Common-Anode CA 5101BS 7-Segment 5101BS Display To remove the metal plate, and then start from the bottom to pry open and side metal assembly, you can pull out the LED control board. The main control board uses two crystal bright source BP2867F chips, which is a non-isolated step-down LED constant current power supply chip applicable to the full range of input voltage from 85Vac to 265Vac. Chip ROVP pin band Enable function for switch toning and induction lamp applications in DIP7 package. Common-Cathode CC CL4031AW LED CL4031AW 0.40 inch Common-Anode CA CL4031BW 7-Segment CL4031BW Display