Crucial Exams

CompTIA A+ 220-1101 (V14) Practice Question

When comparing LCD and OLED screens used in smartphones and tablets, which statement correctly explains how OLED achieves deeper black levels than an LCD?

  • OLED screens use a brighter LED backlight that produces higher contrast.

  • OLED displays rely on a cold-cathode fluorescent lamp (CCFL) and inverter to illuminate the screen.

  • OLED panels regulate a twisted-nematic liquid-crystal layer to control light from an LED backlight.

  • OLED pixels emit their own light, so they can be turned completely off instead of blocking a backlight.

CompTIA A+ 220-1101 (V14)
Mobile Devices
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