Pixel circuit, method for driving the pixel circuit and display panel
AssigneeSeeya Optronics Co., Ltd.
InventorsPing-Lin Liu, Tong Wu
Life of this patent
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Abstract
Provided are a pixel circuit, a method for driving the pixel circuit, and a display panel. The pixel circuit includes a drive transistor including a gate terminal, a source terminal, a drain terminal, and a body terminal, where the source terminal is connected to a first power line, the body terminal is connected to a second power line, and the gate terminal of the drive transistor is connected to a gate potential control circuit; the first power line is configured to provide a first voltage or a second voltage, where the first voltage is higher than the second voltage; and the second power line is configured to provide the fixed first voltage.
Claims20
A pixel circuit, comprising a drive transistor, wherein the drive transistor comprises a gate terminal, a source terminal, a drain terminal, and a body terminal;
- wherein the source terminal of the drive transistor is connected to a first power line, the body terminal of the drive transistor is connected to a second power line, and the gate terminal of the drive transistor is connected to a gate potential control circuit;
- wherein the first power line is configured to provide a first voltage or a second voltage, and the first voltage is higher than the second voltage;
- and
- wherein the second power line is configured to provide the first voltage;
- wherein an initialization stage of the pixel circuit comprises a first time period and a second time period;
- wherein in the first time period, a voltage provided by the first power line is decreased from the first voltage to the second voltage, a threshold voltage of the drive transistor is increased from a first threshold voltage to a second threshold voltage, and the gate potential control circuit controls a voltage of the gate terminal to be decreased such that the drive transistor is turned off;
- wherein in the second time period, the voltage provided by the first power line is increased from the second voltage to the first voltage, the threshold voltage of the drive transistor is decreased from the second threshold voltage to the first threshold voltage, and the gate potential control circuit controls the voltage of the gate terminal of the drive transistor to be increased such that the drive transistor is turned on;
- wherein an increase of the voltage of the gate terminal of the drive transistor in the second time period is smaller than a decrease of the voltage of the gate terminal in the first time period.
A display panel, comprising the pixel circuit according to clam 1.
A method for driving a pixel circuit, wherein the pixel circuit comprises a drive transistor, wherein the drive transistor comprises a gate terminal, a source terminal, a drain terminal, and a body terminal;
- wherein the source terminal of the drive transistor is connected to a first power line, the gate terminal of the drive transistor is connected to a gate potential control circuit, and the first power line is configured to provide a first voltage or a second voltage;
- wherein the first voltage is higher than the second voltage, and a second power line is configured to provide the fixed first voltage;
- wherein the method for driving a pixel circuit comprises:
- an initialization stage of the pixel circuit comprising a first time period and a second time period;
- in the first time period, decreasing a voltage of the source terminal of the drive transistor from the first voltage to the second voltage, maintaining a voltage of the body terminal to be the first voltage, increasing a threshold voltage of the drive transistor from a first threshold voltage to a second threshold voltage, and controlling, by the gate potential control circuit, a voltage of the gate terminal to be decreased such that the drive transistor is turned off;
- and
- in the second time period, increasing the voltage of the source terminal of the drive transistor from the second voltage to the first voltage, maintaining the voltage of the body terminal to be the first voltage, decreasing the threshold voltage of the drive transistor from the second threshold voltage to the first threshold voltage, and controlling, by the gate potential control circuit, the voltage of the gate terminal of the drive transistor to be increased such that the drive transistor is turned on;
- wherein an increase of the voltage of the gate terminal of the drive transistor in the second time period is smaller than a decrease of the voltage of the gate terminal in the first time period such that the gate terminal is initialized.
Dependencies are inferred from the claim text.