Civil Services Prep

Prelims 2017 · Science and Technology · Question 24

Organic Light Emitting Diodes (OLEDs) are used to create digital display in many devices. What are the advantages of OLED displays over Liquid Crystal displays?

  1. OLED displays can be fabricated on flexible plastic substrates.
  2. Roll-up displays embedded in clothing can be made using OLEDs.
  3. Transparent displays are possible using OLEDs.

Select the correct answer using the code given below:

  1. 1 and 3 only
  2. 2 only
  3. 1, 2 and 3
  4. None of the above statements is correct

Answer

1, 2 and 3

1. OLED displays can be fabricated on flexible plastic substrates. — Correct. OLEDs are self-emissive and can be built on flexible substrates, unlike conventional LCDs which generally need rigid backlighting arrangements.

2. Roll-up displays embedded in clothing can be made using OLEDs. — Correct. Flexible OLED technology enables bendable/rollable screens and wearable display applications.

3. Transparent displays are possible using OLEDs. — Correct. Transparent OLEDs exist because OLED pixels emit light directly and do not require the same kind of opaque backlight structure as LCDs.

Hence, all three statements are correct.

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