220-801 · Question #661
Which of the following devices is necessary to provide power to a laptop LCD screen?
The correct answer is C. Inverter. Traditional laptop LCD screens use CCFL (Cold Cathode Fluorescent Lamp) backlights, which require AC (alternating current) to operate. A laptop battery supplies DC (direct current). The inverter is the component that converts DC power from the battery into the AC power needed…
Question
Which of the following devices is necessary to provide power to a laptop LCD screen?
Options
- APCMCIA card
- BBacklight
- CInverter
- DPCI-E card
How the community answered
(37 responses)- A3% (1)
- C95% (35)
- D3% (1)
Explanation
Traditional laptop LCD screens use CCFL (Cold Cathode Fluorescent Lamp) backlights, which require AC (alternating current) to operate. A laptop battery supplies DC (direct current). The inverter is the component that converts DC power from the battery into the AC power needed to drive the backlight. Without the inverter, the screen would be dark or unlit. A PCMCIA card (A) is an expansion slot, and PCI-E (D) is a desktop/internal bus - neither powers the display.
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