Pixel circuit and driving method thereof, and display device

A driving method of a pixel circuit, the pixel circuit comprising:

• a light emitting element comprising an anode and a cathode;
• a first switching circuit configured to be in a conductive state, in response to a first scan signal from a first scan line, to transmit a voltage from a data line;
• a driving circuit configured to drive the light emitting element to emit light under control of the voltage transmitted from the first switching circuit, the driving circuit comprising:
• a first transistor, of which a control terminal is configured to be electrically connected to the first switching circuit, a first terminal is electrically connected to a first voltage terminal, and a second terminal is electrically connected to the anode of the light emitting element, and
• a capacitor, of which a first terminal is electrically connected to the first voltage terminal, and a second terminal is electrically connected to the first switching circuit;
• and
• a second switching circuit electrically connected to the data line, the second terminal of the first transistor, and the anode of the light emitting element, and configured to be in a conductive state, in response to a second scan signal from a second scan line, to stabilize a potential of the data line at a first fixed potential and a second fixed potential respectively,
• wherein the driving method comprises:
• stabilizing, in a first stage, the potential of the data line at the first fixed potential that makes the light emitting element emit light;
• stabilizing, in a second stage, the potential of the data line at the second fixed potential that makes the first transistor be turned off;
• and
• providing, in a display stage, a compensated data voltage to the data line to drive the light emitting element to emit light, wherein the compensated data voltage is determined according to the first fixed potential and the second fixed potential,
• wherein the first stage and the second stage are in a non-display stage,
• wherein the first stage comprises a first non-display stage and a second non-display stage after the first non-display stage,
• wherein, in the first non-display stage, the first switching circuit is turned on in response to the first scan signal from the first scan line to transmit a sensing voltage from the data line to the second end of the capacitor and the control terminal of the first transistor, the first transistor is turned on under control of the sensing voltage to generate a sensing current, and the second switching circuit is turned off in response to the second scan signal from the second scan line;
• and
• in the second non-display stage, the first switching circuit is turned off in response to the first scan signal, and the second switching circuit is turned on in response to the second scan signal to charge the data line by the sensing current, thereby stabilizing the potential of the data line at the first fixed potential.

A driving method of a pixel circuit, the pixel circuit comprising:

• a light emitting element comprising an anode and a cathode;
• a first switching circuit configured to be in a conductive state, in response to a first scan signal from a first scan line, to transmit a voltage from a data line;
• a driving circuit configured to drive the light emitting element to emit light under control of the voltage transmitted from the first switching circuit, the driving circuit comprising:
• a first transistor, of which a control terminal is configured to be electrically connected to the first switching circuit, a first terminal is electrically connected to a first voltage terminal, and a second terminal is electrically connected to the anode of the light emitting element, and
• a capacitor, of which a first terminal is electrically connected to the first voltage terminal, and a second terminal is electrically connected to the first switching circuit;
• and
• a second switching circuit electrically connected to the data line, the second terminal of the first transistor, and the anode of the light emitting element, and configured to be in a conductive state, in response to a second scan signal from a second scan line, to stabilize a potential of the data line at a first fixed potential and a second fixed potential respectively,
• wherein the driving method comprises:
• stabilizing, in a first stage, the potential of the data line at the first fixed potential that makes the light emitting element emit light;
• stabilizing, in a second stage, the potential of the data line at the second fixed potential that makes the first transistor be turned off, wherein the first stage and the second stage are in a non-display stage;
• and
• providing, in a display stage, a compensated data voltage to the data line to drive the light emitting element to emit light, wherein the compensated data voltage is determined according to the first fixed potential and the second fixed potential,
• wherein the second stage comprises a third non-display stage, and in the third non-display stage, the second switching circuit is turned on in response to the second scan signal to charge the data line, and the first switching circuit is turned on in response to the first scan signal to charge the capacitor by the data line, thereby stabilizing the potential of the data line at the second fixed potential.