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A quantum dot display is a display device that uses quantum dots (QD), semiconductor nanocrystals which can produce pure monochromatic[a] red, green, and blue light. Photo-emissive quantum dot particles are used in LCD backlights or display color filters. Quantum dots are excited by the blue light from the display panel to emit pure basic colors, which reduces light losses and color crosstalk in color filters, improving display brightness and color gamut. Light travels through QD layer film and traditional RGB filters made from color pigments, or through QD filters with red/green QD color converters and blue passthrough. Although the QD color filter technology is primarily used in LED-backlit LCDs, it is applicable to other display technologies which use color filters, such as blue/UV active-matrix organic light-emitting diode (AMOLED) or QNED/MicroLED display panels.[1][2][3] LED-backlit LCDs are the main application of photo-emissive quantum dots, though blue organic light-emitting diode (OLED) panels with QD color filters are now coming to market. [4]
Electro-emissive or electroluminiscent quantum dot displays are an experimental type of display based on quantum-dot light-emitting diodes (QD-LED; also EL-QLED, ELQD, QDEL). These displays are similar to AMOLED and MicroLED displays, in that light would be produced directly in each pixel by applying electric current to inorganic nano-particles. Manufacturers asserted that QD-LED displays could support large, flexible displays and would not degrade as readily as OLEDs, making them good candidates for flat-panel TV screens, digital cameras, mobile phones and handheld game consoles.[5][6][7]
As of June 2016,[update] all commercial products, such as LCD TVs branded as QLED, employ quantum dots as photo-emissive particles; electro-emissive QD-LED TVs exist in laboratories only.[8][9] Quantum dot displays are capable of displaying wider color gamuts, with some devices approaching full coverage of the BT.2020 color gamut.[10][11][12] QD-OLED and QD-LED displays can achieve the same contrast as OLED/MicroLED displays with "perfect" black levels in the off state, unlike LED-backlit LCDs.
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- ^ Mu-Hyun, Cho. "Samsung researching quantum dot on MicroLED TVs". ZDNet.
- ^ "StackPath". www.laserfocusworld.com. 8 January 2019.
- ^ "Quantum Dots to Shrink MicroLED Display Pixels". EETimes. 11 January 2019.
- ^ https://www.tomsguide.com/reviews/sony-bravia-xr-a95l-qd-oled-tv
- ^ Quantum-dot displays could outshine their rivals, New Scientist, 10 December 2007
- ^ "Quantum Dot Electroluminescence". evidenttech.com. Archived from the original on 16 December 2009. Retrieved 3 April 2018.
- ^ Bullis, Kevin (1 May 2006). "Nanocrystal Displays". MIT Technology Review. Retrieved 3 April 2018.
- ^ www.etnews.com (18 October 2016). "Next Samsung Electronics' QLED TV's Name to Be SUHD QLED TV". etnews.com. Retrieved 3 April 2018.
- ^ "How QLED TV could help Samsung finally beat LG's OLEDs". cnet.com. 30 June 2016. Retrieved 3 April 2018.
- ^ Society for Information Display, Digest of Technical Papers (9 April 2019). "Next-Generation Display Technology: Quantum-Dot LEDs". doi:10.1002/sdtp.10276.
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