What are the ways to improve the quality of LED lamp beads?

SMD LED lamp beads are cheap, can be mass-produced; high brightness, long service life, convenient DIY and other characteristics.

What is a surface mount light emitting diode:

    SMDled refers to the installation of light-emitting diodes on the surface, which helps to improve production efficiency and the application of different facilities. It is a solid semiconductor device that can directly convert electricity into light. Its voltage is 1.9-3.2V, red light and yellow light voltage are low. The LED heart is a semiconductor chip. One end of the chip is attached to the bracket, one end is negative, and the other end is connected to the positive pole of the power supply, so that the entire chip is packaged by epoxy resin .
    
    The semiconductor wafer is composed of two parts, one part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor, which is mainly electrons. But when these two semiconductors are connected, a P-N junction is formed between them. When the current acts on the chip through the wire, the electrons will be pushed to the P area, the electrons will combine with the holes in the P area, and then emit energy in the form of photons. This is the principle of LED light emission. The wavelength of light, that is, the color of light, is determined by the material forming the P-N junction.

Features of 　　 high-brightness led lamp beads:

1. Applicability: Very small, the LED chip of each unit is 3-5mm square, which can be made into various shapes of devices, suitable for variable environments.

2. Stability: 100,000 hours, light decay 50%.

3. Response time: The response time of incandescent lamps is milliseconds, and the response time of LED lamps is nanoseconds.

4. Environmental pollution: no harmful metal mercury.

5. Color: changing the current to change the color, the light-emitting diode can easily adjust the energy band structure and band gap of the material through chemical modification methods to achieve red, yellow, green, blue, and orange multi-color light. For example, a small current is a red LED. As the current increases, it can turn into orange, yellow, and finally green.

6. Voltage: The high-brightness LED lamp bead uses a low-voltage power supply, and the power supply voltage is between 2-4V, depending on the product, so it is a high-voltage power supply;

7. Current: The working current is 0-15 mA, and the brightness changes with the increase of the current.

8. Efficiency: Energy consumption is reduced by 80% compared to incandescent lamps with the same luminous efficiency.