University of Michigan scientists using AFOSR-funding have created the smallest pixels available that will enable LED, projected and wearable displays to be more energy efficient with more light manipulation possible and all on a display that may eventually be as small as a postage stamp.
This latest nanostructuring technology for the Air Force developed by Dr. Jay Guo, associate professor in the Department of Electrical Engineering and Computer Science at the University of Michigan and his graduate student researchers, Ting Xu, Yi-Kuei Wu and collaborator Dr. Xiangang Luo includes a new color filter made of nano-thin sheets of metal-dielectric-metal stack, which have perfectly-shaped slits that act as resonators. They trap and transmit light and transform the pixels into effective color filtering elements.
The pixels created from this technology are ten times smaller than what are now on a computer monitor and eight times smaller than ones on a smart phone. They use existing light more effectively and make it unnecessary to use polarizing layers for liquid crystal displays (LCDs). They enable the backlighting on the LED to be used more efficiently. Prior to this technology, LCDs had two polarizing layers, a color filter sheet, two layers of electrode-laced glass and a liquid crystal layer, but only about five percent of the backlighting reached the viewer.
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