LONDON – Materials company Nanosys Inc. has announced that it can enhance the color gamut of liquid crystal displays with its scalable Quantum Dot Enhancement Film (QDEF).
Nanosys (Palo Alto, Calif.), founded in 2001, commercialized its quantum dot technology in 2010 with the QuantumRail, a process-ready component for smaller format LCDs that improves color gamut and power efficiency. QuantumRail provides improved color for mobile devices with zero change in thickness.
The range of colors can be increased by a factor of three using QDEF Nanosys claims allowing for "richer" reds and a "deeper palette" of greens.
The current generation of LCDs can only express 20 to 35 percent of the colors the human eye can see, according to Nanosys. QDEF enhanced displays can deliver over 60 percent of visible colors, the company claimed.
The QDEF can be scaled in size up to any size including large televisions. It is designed to replace the functionality of a diffuser sheet and can be added to the stack with little change in overall thickness or manufacturing process, the company said.
QDEF includes Nanosys proprietary quantum dot phosphors that convert blue light from a standard GaN LED into different wavelengths based upon their size. Larger dots emit longer wavelengths (red), while smaller dots emit shorter wavelengths (green).
"We believe color will be a significant differentiator for early adopters of quantum dot technology and QDEF will give display makers a competitive edge by providing consumers with a color quality experience they have only seen in movie theatres and professionally printed photos," said Jason Hartlove, president and CEO of Nanosys, in a statement. "Almost all content available today has to be dialed down to match the limited capabilities of current displays, but with a QDEF enabled display developers and producers can create a photo-quality color experience for the user."
The company plans to expand its manufacturing capacity as it continues to commercialize its LCD and energy-storage technologies.
My understanding is that the quantum dot enhancer does not replace the RGB color filters of a conventional LCD...it enables a "richer" white backlight...that when filtered down produces a broader gamut of reds and greens.
I would say cleaver use to words with 'zero change in thickness'. The QD's variation in size can act as a color filter but for a homogeneous filtering the size should be nearly same. We can for sure increase the color range but what about the color sharpness? The early adoption of this technology will depend on the marketability.