CompTIA A+ 220-1201 (V15) Practice Question
Which of the following display technologies requires a separate backlight because its pixels do NOT emit light on their own?
Plasma
LCD (IPS/TN/VA panel)
MicroLED
OLED
Which of the following display technologies requires a separate backlight because its pixels do NOT emit light on their own?
Plasma
LCD (IPS/TN/VA panel)
MicroLED
OLED
LCD panels (including IPS, TN, and VA variants) are transmissive; their liquid crystals merely modulate light passing through them and do not generate light. A dedicated back-light unit (LED or CCFL) provides the illumination, so if the backlight fails, the screen appears dark.
OLED, plasma, and MicroLED displays are emissive technologies whose pixels produce their own light and therefore do not need an independent backlight.
References: Liquid-crystal displays require a backlight ; OLED panels are self-luminous and have "no backlight" .
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