US 7,868,859 B2 · Self-luminous display device and driving method of the same

Abstract

Disclosed herein is a self-luminous display device including: pixel circuits; and a drive circuit, wherein each of the pixel circuits includes a light-emitting diode, a drive transistor connected to a drive current path of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor, during a period in which at least actual threshold voltage and mobility corrections are performed on the drive transistor before the light-emitting diode can emit light, the drive circuit performs a preliminary threshold voltage correction of the drive transistor, i.e., a dummy Vth correction, with the light-emitting diode in a non-light emitting state, the drive circuit next performs a correction preparation for a constant period by reverse-biasing the light-emitting diode and initializing the voltage held by the holding capacitor, and the drive circuit performs the actual threshold voltage correction and mobility correction after the correction preparation.

Claims10

Dependent claims

A self-luminous display device comprising:

pixel circuits;
and
a drive circuit, wherein
each of the pixel circuits includes a light-emitting diode, a drive transistor connected to a drive current path of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor,
during a period in which at least actual threshold voltage and mobility corrections are performed on the drive transistor before the light-emitting diode can emit light, the drive circuit performs a preliminary threshold voltage correction of the drive transistor, i.e., a dummy Vth correction, with the light-emitting diode in a non-light emitting state,
the drive circuit next performs a correction preparation for a constant period by reverse-biasing the light-emitting diode and initializing the voltage held by the holding capacitor, and
the drive circuit performs the actual threshold voltage correction and mobility correction after the correction preparation.

4 more elements

A driving method of a self-luminous display device, the self-luminous display device including pixel circuits, each of the pixel circuits including a light-emitting diode, a drive transistor connected to a drive current path of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor, the driving method comprising:

a non-light emission setting step of setting the light-emitting diode to a non-light emitting state;
a dummy Vth correction step of performing a preliminary threshold voltage correction of the drive transistor;
a correction preparation step of reverse-biasing the light-emitting diode and initializing the voltage held by the holding capacitor;
an actual threshold voltage correction step of performing a threshold voltage correction of the drive transistor;
a mobility correction step of performing a mobility correction of the drive transistor by writing a data potential to the pixel circuit;
and
a light emission setting step of forward-biasing the light-emitting diode to emit light according to the written data potential.

4 more elements

Dependencies are inferred from the claim text.

Self-luminous display device and driving method of the same

Life of this patent

Self-luminous display device and driving method of the same

Life of this patent

Abstract

Claims10