Patent ID: 8576147
Filing Date: 2013-11-05
Classification: G09G

Abstract:
1. A display device comprising: a pixel portion comprising: a first amplifier; a second amplifier; a first element; and a second element, wherein each of the first pixel, the second pixel, the third pixel and the fourth pixel comprises a first transistor, a second transistor and a light emitting element; wherein a gate of the first transistor of the first pixel is electrically connected to the first gate signal line, wherein a gate of the first transistor of the second pixel is electrically connected to the first gate signal line, wherein a gate of the first transistor of the third pixel is electrically connected to the second gate signal line, wherein a gate of the first transistor of the fourth pixel is electrically connected to the second gate signal line, wherein one of a source and a drain of the first transistor of the first pixel is electrically connected to the first source signal line, wherein one of a source and a drain of the first transistor of the second pixel is electrically connected to the second source signal line, wherein one of a source and a drain of the first transistor of the third pixel is electrically connected to the first source signal line, wherein one of a source and a drain of the first transistor of the fourth pixel is electrically connected to the second source signal line, wherein the other of the source and the drain of the first transistor of the first pixel is electrically connected to a gate of the second transistor of the first pixel, wherein the other of the source and the drain of the first transistor of the second pixel is electrically connected to a gate of the second transistor of the second pixel, wherein the other of the source and the drain of the first transistor of the third pixel is electrically connected to a gate of the second transistor of the third pixel, wherein the other of the source and the drain of the first transistor of the fourth pixel is electrically connected to a gate of the second transistor of the fourth pixel, wherein one of a source and a drain of the second transistor of the first pixel is electrically connected to the light emitting element of the first pixel, wherein one of a source and a drain of the second transistor of the second pixel is electrically connected to the light emitting element of the second pixel, wherein one of a source and a drain of the second transistor of the third pixel is electrically connected to the light emitting element of the third pixel, wherein one of a source and a drain of the second transistor of the fourth pixel is electrically connected to the light emitting element of the fourth pixel, wherein the other of the source and the drain of the second transistor of the first pixel is electrically connected to a first power source line, wherein the other of the source and the drain of the second transistor of the second pixel is electrically connected to the first power source line, wherein the other of the source and the drain of the second transistor of the third pixel is electrically connected to a second power source line, wherein the other of the source and the drain of the second transistor of the fourth pixel is electrically connected to the second power source line, wherein the first amplifier is electrically connected to the first power source line, wherein the second amplifier is electrically connected to the second power source line, wherein each of the first element and the second element comprises the same materials as the light emitting element, wherein the light emitting element of the first pixel, the light emitting element of the second pixel and the first element are arranged in a direction parallel to the first gate signal line, and wherein the light emitting element of the third pixel, the light emitting element of the fourth pixel and the second element are arranged in a direction parallel to the second gate signal line.