Q. Which of the following is/are advantages of Organic Light Emitting Diodes (OLEDs) over Liquid Crystal Displays (LCDs)?

1. OLEDs do not require a backlight and filters.
2. OLEDs are more efficient and can be fabricated on flexible plastic substrates.
3. OLEDs are more efficient at displaying bright images.
4. OLEDs can be fabricated into roll-up displays.

Select the correct answer using the codes given below:
Answer: Only 1, 2 & 4
Notes: OLEDs emit light directly and do not require a backlight or filters, are efficient for dark images, can be fabricated on flexible or roll-up displays, and are thinner than LCDs. However, OLEDs are typically less efficient than LCDs at displaying bright images; LCDs use less power for such content. Thus, statements 1, 2, and 4 are correct.