220-801 · Question #766
Which of the following laptop display types relies on a backlight for the display presentation?
The correct answer is A. LCD. In the context of this exam question (reflecting the CompTIA A+ curriculum), LCD refers specifically to displays backlit by Cold Cathode Fluorescent Lamps (CCFL). LCD panels themselves do not emit light; they manipulate light passing through them, so they require a dedicated…
Question
Which of the following laptop display types relies on a backlight for the display presentation?
Options
- ALCD
- BLED
- CCRT
- DPlasma
How the community answered
(29 responses)- A86% (25)
- B3% (1)
- C3% (1)
- D7% (2)
Explanation
In the context of this exam question (reflecting the CompTIA A+ curriculum), LCD refers specifically to displays backlit by Cold Cathode Fluorescent Lamps (CCFL). LCD panels themselves do not emit light; they manipulate light passing through them, so they require a dedicated backlight source. CRT displays use an electron beam striking phosphors-no backlight needed. Plasma displays use electrically excited ionized gases that emit their own light. LED-backlit displays (often called 'LED' in the industry) are technically a sub-type of LCD but use LED arrays instead of CCFL tubes. The exam distinguishes LCD (CCFL backlit) from LED as separate categories.
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