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Organic Light-Emitting Diode (OLED)

Definition - What does Organic Light-Emitting Diode (OLED) mean?

An organic light-emitting diode (OLED) is a solid-state light device that makes use of flat light emitting technology with the help of two conductors between which a series of organic thin films are kept. Unlike other display modes, an OLED does not require backlighting. Because of its low power consumption and great brightness, OLED is used as a backlight source in LCD displays, electronic equipment, signaling as well as in general lighting.

Techopedia explains Organic Light-Emitting Diode (OLED)

When current is transmitted to the electrodes, the movement of charges happens with the influence of the electric field. Electrons depart from the cathode, whereas holes depart from the anode in the opposite direction. Photons are created by the recombination of these charges whose frequency is decided by the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of the molecules being emitted. This results in the transformation of power to light.

Advantages of OLED over LCD:
  • OLED-based screens can be significantly thinner, resulting in lighter weight.
  • OLED has better contrast and allows a higher refresh rate.
  • OLED allows new display capabilities like ultra-thin, transparent displays.
  • Power consumption is very low.
  • OLED-based screens provide a fuller viewing angle and are also much brighter.
  • Durability is better. OLEDs can work in broader temperatures as well.
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