Patent ID: 7733315

Claim:
A display device comprising: a plurality of source signal lines; a plurality of gate signal lines; a first power supply line in columns; a second power supply line in columns; a third power supply line in columns; a first power supply lines in rows; a second power supply lines in rows; a third power supply lines in rows; and a plurality of pixels arranged in matrix, wherein the plurality of pixels includes a first pixel for red, a second pixel for green, and a third pixel for blue, wherein each of the plurality of pixels includes a switching thin film transistor, a driving thin film transistor, and a light emitting element, wherein the first pixel for red is connected to the first power supply line in columns, and the first power supply line in columns is connected to the first power supply line in rows, wherein the second pixel for green is connected to the second power supply line in columns, and the second power supply line in columns is connected to the second power supply line in rows, wherein the third pixel for blue is connected to the third power supply line in columns, and the third power supply line in columns is connected to the third power supply line in rows, wherein the first power supply line in rows, the second power supply line in rows, and the third power supply line in rows are constructed to be supplied different voltages each other, wherein an insulating thin film is formed in a portion under at least one of the plurality of source signal lines, the plurality of gate signal lines, the first power supply line in columns, the second power supply line in columns, the third power supply line in columns, the first power supply line in rows, the second power supply line in rows, and the third power supply line in rows.