Pixel circuit, driving method thereof, and display panel

Abstract

Disclosed are a pixel circuit, a driving method thereof, and a display panel including the pixel circuit. The pixel circuit includes: a light emitting module, a first driving module and a second driving module, the first driving module drives the light emitting module during a first period under the control of the first scanning signal of the first scanning control terminal emit light, and the second driving module drives the light emitting module to emit light during a second period under the control of the second scan signal of the second scan control terminal, and the first period and the second period do not overlap with each other . By using two driving modules to alternately drive the light-emitting device to emit light, the other driving module enters the recovery phase when one driving module drives the light-emitting device to emit light, so that the threshold voltage drift of the driving transistor in each driving module can be reduced, and at the same time, each driving module can be extended. The service life of the drive transistor of the module.

Description

technical field [0001] The present invention relates to the display field, and more particularly relates to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] At present, in order to suppress the influence of the threshold voltage of the driving transistor in the pixel circuit of the organic light emitting diode display device on the luminance of the organic light emitting diode, the threshold voltage compensation function has been implemented in the pixel circuit, so that the influence of the threshold voltage of the driving transistor on the organic light emitting diode can be compensated. The effect of the light-emitting brightness of the light-emitting diode. For the whole organic light emitting diode display device, the non-uniformity and drift of the threshold voltage of the driving transistor of each pixel can reduce the phenomenon of uneven brightness or flickering of the whole organic light emitting diode display device. ...

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Problems solved by technology

[0003] However, during the display process of the organic light emitting diode display device, the gate-source voltage is continuously applied between the gate and the source of the driving transistor of each pixel, so the threshold voltage drift of the driving transistor of each pixel will continue to increase

When the threshold voltage drift is within a certain range, the threshold voltage drift can be compensated by the above-mentioned threshold voltage compensation function, however, when the threshold voltage drift exceeds the certain level, the above-mentioned threshold voltage compensation function becomes invalid, and accordingly Therefore, the display effect of the organic light emitting diode display device is deteriorated, thereby shortening the service life of the organic light emitting diode display device

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