Patent ID: 7629611

Claim:
A light-emitting device comprising a pixel, the pixel comprising a luminous element, a writing element, a driving element, an initializing element, and a capacitance element, wherein the writing element comprises a first semiconductor layer, a first gate electrode, a first gate insulating film between the first semiconductor layer and the first gate electrode, the first semiconductor layer comprising a first channel forming region, a first impurity region, a second impurity region and a third impurity region; wherein the driving element comprises a second semiconductor layer, a second gate electrode, a second gate insulating film between the second semiconductor layer and the second gate electrode, the second semiconductor layer comprising a second channel forming region, a fourth impurity region, a fifth impurity region, and a sixth impurity region; wherein the first impurity region is connected to a source signal line, the second impurity region is connected to one of source and drain regions of the initializing element, and the third impurity is connected to the sixth impurity region of the driving element in the writing element, wherein the other of the source region and the drain region of the initializing element is connected to a power supply line, and wherein the fourth impurity region is connected to the power supply line, the fifth impurity region is connected to a pixel electrode of the luminous element.