Image display apparatus including a non-emission period lowering the gate and source voltage of the drive transistor

摘要

An image display device and method of driving an image display device with alternative repeating of an emission period during which the light emitting element is made to emit light and a non-emission period during which light emission of the light emitting element is stopped. The terminal voltage of a storage capacitor is set to the voltage of a signal line, whereby light emission luminance of the light emitting element in a next emission period is set.

主权项

1. An image display device comprising:
a display section including a plurality of pixel circuits, at least one of the plurality of pixel circuits including: a light emitting element connected between a first node and a common line; a switch transistor connected between the first node and a second node; a driving transistor connected between the second node and a third node; a storage capacitor connected to a control terminal of the driving transistor via a control node; and a writing transistor connected between a signal line and the storage capacitor and configured to control a sampling operation, wherein an emission period during which the light emitting element is made to emit light and a non-emission period during which light emission of the light emitting element is stopped are alternately repeated; in the emission period, at least one of the plurality of pixel circuits is driven such that: a driving potential is applied to the third node so that driving current corresponding to voltage across the storage capacitor is supplied to the light emitting element via the driving transistor and the switch transistor; in the non-emission period, at least one of the plurality of pixel circuits is driven such that: a potential lower than the driving potential is applied to the third node and the driving transistor, and a terminal voltage of the storage capacitor is set to a potential corresponding to the signal line via the writing transistor, whereby the voltage across the storage capacitor is set to a voltage which is larger than a threshold voltage of the driving transistor, and subsequently the voltage across the storage capacitor is set to a voltage corresponding to the threshold voltage of the driving transistor; wherein the switch transistor is set in an off state during the non-emission period, and wherein an anode voltage of the light emitting element is maintained at a voltage obtained by adding the threshold voltage of the driving transistor to a cathode voltage of the light emitting element during the non-emission period.