A display having voltage-driven organic light-emitting pixel circuits. Each pixel circuit includes an organic light-emitting diode, a data writing circuit, a capacitor, three transistors, and a switch. The pixel circuit can compensate the threshold voltage variations of low temperature poly silicon thin...http://www.google.de/patents/US20070146247?utm_source=gb-gplus-sharePatent US20070146247 - ORGANIC LIGHT EMITTING DISPLAY
