LED display light-emitting diode damage causes analysis
Light-emitting diode (LED) is composed of LED full-color display light-emitting devices, control of light-emitting diode light-emitting time and brightness, is equivalent to the control of the display content of the display, so the light-emitting diode is good or bad, is directly related to the normal use of the display with or without, but in the process of using the light-emitting diode is often encountered damage does not light or abnormally bright, so it is necessary to the causes of damage to the Explore.
Light-emitting diode damage is mainly due to
1, light-emitting diode belongs to the voltage-sensitive devices, the sudden increase in supply voltage will lead to light-emitting diode damage. Let the power supply voltage suddenly rise for many reasons, such as the quality of power supply problems, or the user's improper use and so on may let the power supply voltage suddenly rise.
2, a component in the line or printed lines or other wires of the short circuit and the formation of light-emitting diode power supply path of the local short circuit, so that the local voltage increases.
3, a light-emitting diode because of their own quality reasons for damage and thus the formation of a short circuit, the original voltage drop is transferred to other light-emitting diodes.
4, the screen temperature is too high, so that the characteristics of the light-emitting diode change.
5, screen inside the water, water is conductive
6, assembly time is not good anti-static work, so that the LED full-color display light-emitting diodes have been harmed by static electricity inside. Despite the normal voltage and current values applied, it is also very easy to cause damage to the light-emitting diode.
All of these reasons will cause a significant and substantial increase in the current of the light-emitting diode, and soon the light-emitting diode chip will be burned because of overheating. According to statistics, LED full-color display light-emitting diode burned most of the two poles short circuit, a small portion is broken. Each light-emitting diode about 3.2V or so of the voltage drop, burned if it is broken this string of light-emitting diodes do not emit light if it is short-circuited this voltage to other light-emitting diodes caused by other light-emitting diodes greater current, other light-emitting diodes will be burned faster, and even the critical power supply. Originally small damage is very easy to cause a big accident. LED full-color display screen is generally installed in high places, the installation is not easy, to repair is more difficult.
