Speaking of lamp beads, I believe many people know what it is for. To put it bluntly, lamp beads are light-emitting diodes made of semiconductor materials, which can directly convert electrical energy into light energy and electrical signals into light-emitting devices. The most important thing in the use of SMD lamp beads is heat dissipation. According to the lamp beads produced by different manufacturers, the packaging glue used is different. Pay attention to the time and temperature in the early stage of baking, and pay attention to the temperature of the patch in the later stage. There are two types of LED high-power SMD lamp beads, one is a single PN junction lamp bead, and the other is a lamp bead that integrates multiple PN junctions. The power of the former is mostly 0.2-1W, which can be easily measured with the diode gear of the digital multimeter. The forward voltage drop is around 2.9-3.4V, which can be judged as good. The LED is accompanied by low light when measuring. LEDs above 1W are difficult to measure with manual instruments, and amateurs generally use an adjustable regulated power supply for testing. The applied voltage can be gradually increased from 2V (because the turn-on voltage of high-power LEDs is above 2V), which can be well judged when the LED emits light. LED lamp bead manufacturers choose a high starting point and high standard, concentrate on technological innovation, insist on continuous investment in research and development, continuously improve the core competitiveness of enterprises, and create various series of high-end products in the field of LED optoelectronics to meet the diverse needs of customers from all over the world. LED lamp bead manufacturers seek development by integrity, benefit by management, win the market by service, and survive by quality.