Osram Opto Semiconductors has developed a large-area transparent white OLED that achieves a luminous efficacy of over 20 lm/W at a brightness of 1000 cd/m².

The prototype is transparent either on or off and exhibits a transparence of 55%, which the company hopes to increase to 75%. The OLED has color coordinates of (0.396/0.404) and an active illumination area of 90 cm².

Image Credit: Osram Opto Semiconductors