Patent ID: 8599222

Claim:
A method of driving a pixel circuit that includes: a light emitting element; a driving transistor that is connected to the light emitting element in series; a storage capacitor that is interposed between a path, which is formed between the light emitting element and the driving transistor, and a gate of the driving transistor; a selection switch that is interposed between the gate of the driving transistor and a signal line; and a first control switch that is interposed between the gate of the driving transistor and the signal line and is connected to the selection switch in series, the method comprising: having a voltage between both ends of the storage capacitor gradually approach a threshold voltage of the driving transistor for a compensation period; changing the electric potential of the gate of the driving transistor in accordance with a gray scale electric potential and having the voltage between both ends of the storage capacitor gradually approach the threshold voltage of the driving transistor for a write period after the elapse of the compensation period by supplying the gray scale electric potential according to a gray scale value that is designated to the pixel circuit to the signal line, controlling the selection switch to be in the ON state, and controlling the first control switch to be in the ON state in an operation period, which has a temporal length set to be changed in accordance with the gray scale value, of the write period; and supplying a driving current according to the voltage between the both ends of the storage capacitor to the light emitting element by stopping supply of the electric potential to the gate of the driving transistor for a driving period after elapse of the write period.