Patent ID: 8643576
Filing Date: 2014-02-04
Classification: G09G

Abstract:
1. A method of driving a light emitting device, the light emitting device having a scanning line, a first signal line, a second signal line, a first light emitting element, a first driving transistor having a first gate, a first holding capacitor interposed between the first gate and a first path between the first light emitting element and the first driving transistor, a first selection switch through which the first signal line is electrically connected to the first gate while the first selection switch is in an ON state, a second light emitting element, a second driving transistor having a second gate, a second holding capacitor interposed between the second gate and a second path between the second light emitting element and the second driving transistor, a second selection switch through which the second signal line is electrically connected to the second gate while the second selection switch is in an ON state, and a demultiplexer, the method comprising: executing a first compensation operation by supplying a reference potential from an electric supply line to the first gate and the second gate to make the first driving transistor and the second driving transistor in an ON state so that a first voltage of the first holding capacitor approaches asymptotically to a first threshold voltage of the first driving transistor and a second voltage of the second holding capacitor approaches asymptotically to a second threshold voltage of the second driving transistor during a first period; supplying a first gradation potential to the first signal line by the demultiplexer during a second period; supplying a second gradation potential to the second signal line by the demultiplexer during a third period, wherein the third period is after the second period; supplying the first gradation potential from the first signal line to the first gate through the first selection switch and supplying the second gradation potential from the second signal line to the second gate through the second selection switch during a fourth period, wherein the fourth period is after the second period and the third period; supplying a first driving current to the first light emitting element in accordance with the first voltage held at the first holding capacitor and supplying a second driving current to the second light emitting element in accordance with the second voltage held at the second holding capacitor after the fourth period; and executing a second compensation operation so that the first voltage of the first holding capacitor approaches asymptotically to the first threshold voltage and the second voltage of the second holding capacitor approaches asymptotically to the second threshold voltage after the fourth period.