Patent ID: 7388562
Filing Date: 2008-06-17
Classification: G09G,H01L

Abstract:
1. A display device comprising: a signal line; a scan line; a first power supply line having a fixed potential; a second power supply line; a pixel including a first sub pixel and a second sub pixel wherein each of the first and second sub pixels has a light emitting element; a first transistor having gate, source and drain electrodes, wherein one of the source and drain electrodes of the first transistor is electrically connected to the light emitting element of the first sub pixel; a second transistor having gate, source and drain electrodes, wherein one of the source and drain electrodes of the second transistor is electrically connected to the signal line; and a third transistor having gate, source and drain electrodes and electrically connected in series with the first transistor, wherein the other of the source and drain electrodes of the second transistor is electrically connected to the gate electrode of the third transistor, wherein the gate electrode of the first transistor is electrically connected to the first power supply line, wherein the gate electrode of the second transistor is electrically connected to the scan line, wherein the other of the source and drain electrodes of the first transistor and one of the source and drain electrodes of the third transistor are electrically connected with each others, wherein the other of the source and drain electrodes of the third transistor is electrically connected to the second power supply line, and wherein the size of the light emitting area of the first sub pixel and the size of the light emitting area of the second sub pixel are different.