A display of zero power

A new type of ultrathin liquid crystal display (LCD) technology that requires no power supply can display 3D grayscale images. “Because the proposed LCD does not have any driving electronics, the fabrication is extremely simple," explains Abhishek Srivastava of Hong Kong University of Science and Technology. "The bi-stable feature provides a low power consumption display that can store an image for several years,” he adds. At this stage the technology is a proof of principle and is not set to be used in smart phones or televisions if it ever is.