What Is an LCD Inverter?

Techwalla may earn compensation through affiliate links in this story. Learn more about our affiliate and product review process here.
An LCD television sitting on top of a shelving unit
Image Credit: ronstik/iStock/Getty Images

Without light, and LCD screen might as well be a paperweight. Many LCD screens use a cold-cathode fluorescent lamp that requires an inverter. Commonly known as a CCFL inverter, this component prepares the power connection of the DC power supply to work with the AC power requirements of the lamp.

Advertisement

The Inverter's Role

Video of the Day

When a computer is plugged into the wall, it converts the power outlet's AC waves into DC. This works well for digital components, such as the motherboard, but it doesn't work for fluorescent bulbs. The inverter intercepts that DC power, and converts it back to AC power for use by the bulb that lights the screen.

Advertisement

Video of the Day

Troubleshooting the Inverter

When the inverter breaks, it will look like the LCD has shut off. Looking closely, however, you'll still see that the display is still working, as images are still being rendered but are not illuminated. Many LCD fluorescent bulbs are integrated onto a circuit with the inverter, requiring one to be replaced along with the other. If you are not comfortable dismantling your LCD screen, it's often more cost effective to replace the whole LCD than to change the LCD inverter unit.

Advertisement

Advertisement

Advertisement

references & resources

Report an Issue

screenshot of the current page

Screenshot loading...