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220-801 · Question #74
220-801 Question #74: Real Exam Question with Answer & Explanation
The correct answer is B: LCD. Traditional LCD displays use a Cold Cathode Fluorescent Lamp (CCFL) inverter to power the fluorescent backlight behind the liquid crystal panel.
Question
Which of the following technologies uses a Cold Cathode Florescent Lamp Inverter to backlight the screen?
Options
- APlasma
- BLCD
- CLED
- DOLED
Explanation
Traditional LCD displays use a Cold Cathode Fluorescent Lamp (CCFL) inverter to power the fluorescent backlight behind the liquid crystal panel.
Common mistakes.
- A. Plasma displays are self-emitting - each pixel is an individual plasma cell that generates its own light, requiring no backlight or inverter.
- C. LED displays use light-emitting diodes for backlighting and do not require a CCFL inverter board.
- D. OLED displays are self-emitting organic compounds that produce their own light per pixel and require no backlight whatsoever.
Concept tested. CCFL inverter backlight technology in LCD displays
Reference. https://learn.microsoft.com/en-us/windows-hardware/drivers/display/monitor-inf-file-sections
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