US 2024/0185784 A1 · PIXEL CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME

Abstract

A pixel circuit for a display device can include a light-emitting element configured to emit light based on driving current, a driving transistor to control the driving current, and a storage capacitor. The driving transistor includes a gate electrode, a source electrode, and a drain electrode, where a data voltage is applied to the source electrode. An anode electrode of the light-emitting element is coupled to the drain electrode. Further, the storage capacitor has a first electrode connected to a high-potential voltage and a second electrode coupled to the gate electrode of the driving transistor. During an initialization period of a refresh period of the display device, the pixel circuit applies a first initialization voltage to the second electrode of the storage capacitor, applies a second initialization voltage to the anode electrode of the light-emitting element, and applies an on bias stress voltage to the source electrode of the driving transistor.

Claims22

Dependent claims

A pixel circuit for a display device, the pixel circuit comprising:

a light-emitting element including an anode electrode and configured to emit light based on driving current;
a driving transistor including a drain electrode, a source electrode and a gate electrode, and configured to control the driving current, wherein the anode electrode of the light-emitting element is coupled to the drain electrode of the driving transistor;
and
a storage capacitor having a first electrode connected to a high-potential voltage and a second electrode coupled to the gate electrode of the driving transistor,
wherein during an initialization period of a refresh period of the display device, the pixel circuit is configured to apply a first initialization voltage to the second electrode of the storage capacitor, and to apply an on bias stress voltage to the source electrode of the driving transistor.

2 more elements

A display device comprising:

a plurality of pixel circuits, wherein each of the plurality of pixel circuits includes:
a light-emitting element configured to emit light based on driving current;
a driving transistor having a gate electrode, a drain electrode and a source electrode, and configured to control the driving current,
a first transistor connected to and disposed between the gate electrode and the drain electrode of the driving transistor;
a second transistor configured to apply a data voltage to the source electrode of the driving transistor;
a third transistor configured to apply a high-potential voltage to the source electrode of the driving transistor;
a fourth transistor configured to generate a current path between the driving transistor and the light-emitting element;
a fifth transistor configured to apply a first initialization voltage to the gate electrode of the driving transistor;
a storage capacitor having one electrode connected to the high-potential voltage and another electrode coupled to the gate electrode of the driving transistor;
and
a seventh transistor configured to apply an on bias stress voltage to the source electrode of the driving transistor.

8 more elements

Dependencies are inferred from the claim text.

Pixel circuit and display device including the same

Life of this patent

Pixel circuit and display device including the same

Life of this patent

Abstract

Claims22