Tech Doubles the Efficiency of Liquid Crystal Projectors (image) North Carolina State University Share Print E-Mail Caption Researchers have developed new technology to convert unpolarized light into polarized light, which makes projectors that use liquid crystal technology almost twice as energy efficient. The tech, seen here, is called a polarization grating-polarizaiton conversion system. Credit ImagineOptix Corp. Usage Restrictions Photo credit must be given. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.