By Kevin Bullis
A company called Nth Degree Technologies hopes to replace light bulbs with what look like glowing sheets of paper (as shown in this video). The company’s first commercial product is a two-by-four-foot-square light, which it plans to start shipping to select customers for evaluation by the end of the year.
The technology could allow for novel lighting designs at costs comparable to the fluorescent light bulbs and fixtures used now, says Neil Shotton, Nth Degree’s president and CEO. Light could be emitted over large areas from curved surfaces of unusual shapes. The printing processes used to make the lights also make it easy to vary the color and brightness of the light emitted by a fixture. “It’s a new kind of lighting,” Shotton says.
Nth Degree makes its light sheets by first carving up a wafer of gallium nitride to produce millions of tiny LEDs—one four-inch wafer yields about eight million of them. The LEDs are then mixed with resin and binders, and a standard screen printer is used to deposit the resulting “ink” over a large surface.
http://www.technologyreview.com/energy/39010/?nlid=nldly&nld=2011-10-28
