PIXEL CIRCUIT, DISPLAY PANEL, AND DISPLAY DEVICE

摘要

A pixel driving circuit includes a signal loading component, a storage capacitor, a compensation component, a mirror component, and a drive transistor. In a data transmission stage, the signal loading component transmits a received image data signal to the gate of a drive transistor, which is stored in a storage capacitor; and in a threshold voltage compensation stage, the compensation component connects the gate of the drive transistor to the source of the drive transistor so as to generate a drive signal dependent upon the threshold voltage of the drive transistor from the signal stored in the storage capacitor and to drive an organic light emitting diode to emit light, thus eliminating an influence of the threshold voltage of the drive transistor on the current through the organic light emitting diode and preventing the brightness of the organic light emitting diode from varying over its operating period of time.

主权项

1. A pixel circuit for driving an organic light emitting diode, the pixel circuit comprising a signal loading component, a storage capacitor, a compensation component, a mirror component, and a drive transistor, wherein:
the signal loading component is configured to transmit a received image data signal to the gate of the drive transistor in a data transmission stage; the storage capacitor is configured to store a signal at the gate of the drive transistor; the drive transistor is configured to generate the current at the drain thereof according to a difference between the stored signal at the gate thereof and a signal at a source thereof in a light emission stage; the compensation component is configured to connect the gate of the drive transistor to the source of the drive transistor in a threshold voltage compensation stage to generate a drive signal from the image data signal stored in the storage capacitor in the data transmission stage; and the mirror component is configured to mirror the current generated by the drive transistor at the drain thereof into the organic light emitting diode in the light emission stage so that the organic light emitting diode emits light with a difference in voltage between a first power supply signal and a second power supply signal.