SPIE Newsroom: Quantum dots for ultra-high color gamuts in LCDs

The use of a quantum dot enhancement film in LCDs enables the delivery of ultra-high color gamuts covering more than 90% of the color standard for ultra-high-definition TV.

By: Jian Chen, Steve Gensler and Jeff Yurek

23 April 2015, SPIE Newsroom. DOI: 10.1117/2.1201504.005791

The color gamut of LCDs is currently limited by the backlight. In today's LCDs, the dominant backlight technology is based on white LEDs, which are composed of blue LED chips combined with cerium-doped yttrium aluminum garnet, a broadband yellow phosphor with low spectral weights at green and red wavelengths. To fabricate displays with a high color gamut using these white LEDs requires color filters with very narrow transmission bandwidths. As a result, the transmissivity of the liquid crystal panels is much reduced, leading to poor power efficiency.