LCD Display Inverter

Display Inverter / VGA Board / LCD Controller

What is LCD Inverter

LCD inverter

LCD Inverter is an Electronic component device that converts power from AC to DC and used to illuminate the LCD Display CCFL backlight. When power on, it instantly outputs an ultra-high voltage to evaporate the mercury in the cold cathode tube, conduct the two electrodes, generate electrons, and bombard the neon. The gas produces neutrons, then bombards the mercury gas to produce ultraviolet rays, and finally hits the phosphor to emit light, which provides light for the display Glasses, it works normally output voltage is about 600V, and the working current is about 6mA.

2. the basic components of LCD Inverter

LCD Inverter is mainly contained of voltage regulator (buck chopper), self-excited oscillator (mostly Royer oscillator), pulse Wide regulator PWM IC component.

3. Voltage regulator (buck chopper)

Used to adjust the voltage supplied to the free-running oscillator to control the brightness of the Panel CFFL backlight.

working principle
The low-voltage direct current on the main board (usually more than ten V, or 5V) is chopped into a high-frequency alternating current through a switch, and then boosted by a high-frequency transformer to reach the voltage for lighting the lamp. The power and signal of the high-voltage board come from the main board. Generally, there are several wires connected to the main board: power supply V+, power ground G, switch signal S, brightness signal F.