The LED lamp is a solid-state semiconductor device that […]
The LED lamp is a solid-state semiconductor device that can convert electrical energy into visible light. It can directly convert electricity into light. The heart of the LED is a semiconductor chip, one end of the chip is attached to a support, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the entire chip is encapsulated 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, where the electrons recombine with the holes, and then they will emit energy in the form of photons. This is the principle of the LED light emitting light.
Reasons for damage to LED lights:
The voltage of the current is unstable, and the increase of the power supply voltage is particularly easy to cause the destruction of the LED lamp. There are many reasons for the sudden increase of the voltage, the quality of the power supply, or the improper use of the user, etc., may cause the power supply voltage to suddenly increase. It may also be that the LED is short-circuited due to its own quality damage, and its original voltage drop is transferred to other LEDs. The power supply path of the lamp tube is partially short-circuited. This situation is usually caused by a component in the line or the short-circuit of other wires which increases the voltage in this place.
It is also possible that water has entered the lamp, because the water is conductive, which will short-circuit the circuit of the lamp. The heat dissipation effect of the lamp is not good. We all know that the light emission of the lamp tube is a process of heat dissipation. If the temperature in the lamp is too high, the characteristics of the LED will easily deteriorate. This is also easy to cause damage to the LED lamp. When assembling, the anti-static work is not done well, so that the inside of the LED has been damaged by static electricity. Although the normal voltage and current values are applied, it is very easy to cause damage to the LED.
Cleaning and maintenance of LED lights:
First, prevent electrical shocks and prevent transient overcurrent from occurring. Generally, electrical shocks are caused by extremely large transient overcurrents, and the direct consequence of this is to cause damage to other parts close to the welding line, such as sealing materials. Secondly, make a good heat dissipation system. Nowadays, the related technology of LED heat dissipation system in China is not very mature, and excessive heat will directly cause damage to the internal components of the LED lighting, which will lead to the failure of the LED lighting.