Mini projectors are gaining in popularity, and several companies have been investigating embedding them into devices as small as PDA’s and CellPhones. The Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena have worked with their partners the the EU project HYPOLED to couple magnification lenses with a tiny OLED display to create a projector that requires no additional illumination (OLED’s are Light Emitting), and is a mere 2.5cm long and 1.8cm in diameter.
Currently the OLED display produces a monochrome image with a brightness of 10,000 candelas per square meter; for color images the brightness is about half that level. By way of comparison, a computer monitor generates about 150-300 candelas per square meter.
They will be demonstrating this prototype at the Laser World of Photonics trade show from June 15 to 18th in Munich.
