What is the purpose of an inverter in a laptop with an LCD display?
To amplify the audio output of the laptop
To convert analog video signals into digital signals
To increase the battery life by regulating power usage
To convert DC power to AC power for the backlight
The purpose of an inverter in a laptop with an LCD display is to convert direct current (DC) power to alternating current (AC) power to illuminate the backlight of the display. Without an inverter, the CCFL (cold cathode fluorescent lamp) backlight used in older LCDs would not receive the high-voltage AC power it needs to operate, rendering the display unlit and unusable. Modern displays with LED backlights run on DC power and do not require an inverter.
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