Rambus has developed an intellectual property (IP) portfolio called Pentelic to tap into LED lighting industry. Pentelic enables edge-lit light guides to provide both area and directional room lighting offices, schools and retail. According to the company, its IP space is to do with edge lighting a light guide with LEDs and the use of micro-optics embedded into the light guide providing ray angle control so light can be directed out of the light guide. Measured as the total flux from the light engine to the total flux from the guide, efficiency is 92-95%. The guides...