Pixel circuit, driving method of pixel circuit, and display panel

Abstract

The invention discloses a pixel circuit, a method for driving the same and a display panel. The pixel circuit comprises a light emitting element, a driving transistor, a first reset module, a second reset module, a data writing module, a threshold compensating module and a holding module. The light emitting element is used for carrying out light emitting display in response to driving currents; the driving transistor is used for providing the driving currents for the light emitting element in light emitting phases; the first reset module is used for providing initialization voltages for a gridof the driving transistor in initialization phases; the second reset module is electrically connected with a first electrode of the driving transistor and is used for providing initialization voltages for the first electrode of the driving transistor in the initialization phases; the data writing module is used for writing data signals into the grid of the driving transistor; the threshold compensating module is used for compensating for threshold voltages of the driving transistor; the holding module is electrically connected with the grid of the driving transistor and is used for holding grid voltages of the driving transistor in the light emitting phases. According to the technical scheme, the pixel circuit, the method and the display panel in an embodiment of the invention have the advantages that the display uniformity can be improved, the problem of ghost shadow in display procedures can be solved, and display effects can be improved.

Description

Technical field [0001] The embodiments of the present invention relate to the field of display technology, and in particular to a pixel circuit, a driving method of the pixel circuit, and a display panel. Background technique [0002] The OLED display panel is provided with a plurality of pixel circuits. The pixel circuit is used to drive the organic light-emitting element to emit light and display by the scan signal on the corresponding scan line and the data signal on the data line. The pixel drive circuit generally includes a drive transistor, a number of switching transistors and The storage capacitor and the drive current generated by the drive transistor drive the organic light-emitting element to emit light. Existing pixel circuits generally exhibit uneven display due to the drift of the threshold voltage of the driving transistor caused by the process and the aging of the TFT. By capturing the threshold voltage of the driving transistor and compensating the existing pixe...

AI Technical Summary

Problems solved by technology

However, there is still a hysteresis effect when switching between high and low gray scales, resulting in afterimages and uneven brightness in the first frame

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