Pixel circuit and display device having the same
AssigneesBoe Technology Group Co., Ltd., Chengdu Boe Optoelectronics Technology Co., Ltd.
InventorYingsong XU
Life of this patent
Estimating the term…
Abstract
A pixel circuit is disclosed that includes an organic light-emitting diode, a driving transistor connected in series with the organic light-emitting diode and having a gate connected to a first node and a drain connected to a second node, a dual-gate transistor coupled between the first node and the second node, and a leakage current suppression structure for suppressing a change in a driving current of the organic light-emitting diode caused by a leakage current flowing through the dual-gate transistor. A display device having the pixel circuit is also disclosed.
Claims20
A pixel circuit comprising:
- an organic light-emitting diode;
- a driving transistor connected in series with the organic light-emitting diode and configured to drive the organic light-emitting diode to emit light by means of a driving current flowing through the organic light-emitting diode during a light emission phase, wherein the driving transistor has a gate connected to a first node and a drain connected to a second node;
- a dual-gate transistor coupled between the first node and the second node to cause the driving transistor to form a diode structure when the dual-gate transistor is turned on, wherein the dual-gate transistor comprises two sub-transistors connected in series via a common terminal;
- and
- a leakage current suppression structure for suppressing a change in the driving current caused by a leakage current flowing through the dual-gate transistor.
A display device comprising:
- a pixel array comprising a plurality of pixel circuits;
- a first scan driver configured to supply scan signals to the pixel array;
- a second scan driver configured to supply light emission control signals to the pixel array;
- and
- a data driver configured to supply data signals to the pixel array,
- wherein each of the plurality of pixel circuits comprises:
- an organic light-emitting diode;
- a driving transistor connected in series with the organic light-emitting diode and configured to drive the organic light-emitting diode to emit light by means of a driving current flowing through the organic light-emitting diode during a light emission phase, wherein the driving transistor has a gate connected to a first node and a drain connected to a second node;
- a dual-gate transistor coupled between the first node and the second node to cause the driving transistor to form a diode structure when the dual-gate transistor is turned on, wherein the dual-gate transistor comprises two sub-transistors connected in series via a common terminal;
- and
- a leakage current suppression structure for suppressing a change in the driving current caused by a leakage current flowing through the dual-gate transistor.
Dependencies are inferred from the claim text.