Nanosys Lands Patent for QD-Based Color Conversion Layer in Display Devices

Nanosys landed a U.S. patent Tuesday for methods of fashioning a quantum-dot-based color conversion layer in display devices, Patent and Trademark Office records show. QDs “have the unique ability to emit light at a single spectral peak with narrow line width, creating highly saturated colors,” said the patent (No. 10,128,417), which names a team of nine Nanosys inventors, including CEO Jason Hartlove. “It is possible to tune the emission wavelength based on the size of the QDs.” This enables display engineers to custom-design “a spectrum of light to maximize both the efficiency and color performance of the display,” it said. “The size-dependent properties of QDs are used to produce a QD film,” which then may be used as a color down-conversion layer in display devices, it said. Doing so in emissive displays “can improve the system efficiency by down-converting white light to a more reddish light, greenish light, or both before the light passes through a color filter,” reducing the loss of “light energy,” it said. Nanosys didn’t comment on the invention’s commercial implications.