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In electronics, an inverter can be defined as a device for converting direct current (DC) power into alternating current (AC). An example of an inverter is the adapter used in cars for converting the low voltage cigarette lighterâs power (DC) into mains equivalent voltage (AC).This allows the use of many types of household electrical devices while on the road. In a laptop, an inverter is often used to light the computer's screen.A laptop inverter is a small circuit board, usually about the size of a pen. Internally, a laptop runs on a low voltage, with the exception of the screen, which uses a backlit liquid crystal display (LCD).Without the inverter and the bulb it powers, the screen would be too faint to see properly.n a laptop, an inverter is often used to light the computer's screen. A laptop inverter is a small circuit board, usually about the size of a pen.
Laptop inverter boards (also know as LCD inverter, FL inverter, screen inverter, backlight inverter) come in different shapes and sizes. On the picture above you see some typical looking inverter boards found in laptop computers. The inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. The inverter board converts low voltage DC power (few volts) supplied by the motherboard to high voltage AC power (few hundred volts) needed for the backlight lamp. When the inverter board works properly, the backlight lamp gets power and the LCD screen lights up. As a result, the image on the screen is bright.