Thin-film transistor, pixel circuit, and driving method for pixel circuit

A thin-film transistor, applied to a pixel circuit, and comprising:

• a first gate, configured to be applied with a data voltage;
• a second gate, located on two opposite sides of an active layer of the thin-film transistor with the first gate, and configured to:
• use at least two different voltages within different preset grayscale intervals, and use the same voltage within the same preset grayscale interval,
• wherein the pixel circuit comprises a first voltage writing module, a second voltage writing module, and a compensation module;
• wherein a control terminal of the first voltage writing module is connected to a first scan line, and a control terminal of the second voltage writing module is connected to the first scan line;
• wherein the compensation module is connected between a first electrode of the thin-film transistor and the first gate, wherein a control terminal of the compensation module is connected to a second scan line, the first voltage writing module is connected between a first voltage signal line and a second electrode of the thin-film transistor, the first voltage writing module is configured to, in response to a first scan signal on the first scan line, be turned on during a data writing and compensation stage to transmit the data voltage on the first voltage signal line to the second electrode of the thin-film transistor, and the compensation module is configured to, in response to a second scan signal on the second scan line, be turned on during the data writing and compensation stage to write a voltage containing information about the data voltage and threshold voltage information to the first gate;
• the second voltage writing module is connected between the second gate and a second voltage signal line;
• and
• the thin-film transistor is a metal oxide transistor.