220-801 Question #518: Real Exam Question with Answer & Explanation

The correct answer is B: OLED use light emitting polymers while LED do not.. Standard LED displays are actually LED-backlit LCD panels - the LEDs provide backlight only, and liquid crystals control what light passes through. OLED (Organic Light-Emitting Diode) displays use organic carbon-based compounds (light-emitting polymers) that emit light directly w

Question

Which of the following is the MAIN difference between LED and OLED displays?

Options

ALED employ organic materials while OLED do not.
BOLED use light emitting polymers while LED do not.
CLED emit light in all directions while OLED do not.
DOLED do not require a voltage differential while LED do.

Explanation

Standard LED displays are actually LED-backlit LCD panels - the LEDs provide backlight only, and liquid crystals control what light passes through. OLED (Organic Light-Emitting Diode) displays use organic carbon-based compounds (light-emitting polymers) that emit light directly when current is applied, requiring no backlight - making B correct. A is backwards: it is OLED that uses organic materials, not LED. C is incorrect because LED backlights project light directionally, not in all directions. D is incorrect because both technologies require a voltage differential to operate.

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