CCFL Backlight Tube Used in a Laptop LCD Screen

Like most light-emitting electronic gadgets, LCD laptop screens too are powered by a thin fluorescent tube called the Backlight.

In most cases, it’s a CCFL tube (cold cathode fluorescent lamp) that emits a bright white light under a high frequency input. This in turn lights up your laptop screen from behind.

Within the laptop case, the CCFL tube is paired with an inverter to complete the backlight effect.