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

A driving method of a display panel, the display panel comprising a pixel circuit and a sensing line, the pixel circuit comprising a driving transistor, the driving transistor comprising a gate electrode and a first electrode, the sensing line being coupled to the first electrode of the driving transistor, the driving method comprising:

• during a reference charging period, applying a reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, and at a first time duration after applying the reference data voltage, obtaining a benchmark voltage from the sensing line;
• and
• during a data charging period, applying a detection data voltage different from the reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, at the first time duration after applying the detection data voltage, obtaining an initial sensing voltage from the sensing line;
• wherein a sensing voltage of the pixel circuit is obtained based on at least the benchmark voltage and the initial sensing voltage, and a threshold voltage of the driving transistor is obtained based on the sensing voltage;
• wherein a predetermined interval is set between adjacent display frames;
• and
• the reference charging period and the data charging period are both in a same predetermined interval;
• wherein the reference charging period is before the data charging period;
• the driving method further comprises:
• during a supplementary reference charging period, applying the reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, and at the first time duration after applying the reference data voltage, obtaining a supplementary benchmark voltage from the sensing line;
• wherein the reference charging period, the supplementary reference charging period and the data charging period are all in a same predetermined interval, and the supplementary reference charging period is after the data charging period;
• and
• the sensing voltage of the pixel circuit is obtained based on the benchmark voltage, the supplementary benchmark voltage and the initial sensing voltage.

A display panel, comprising a pixel circuit, a sensing line and a control circuit,

• wherein the pixel circuit comprises a driving transistor, the driving transistor comprises a gate electrode and a first electrode, the sensing line is coupled to the first electrode of the driving transistor;
• the control circuit is configured to perform a detection method of the pixel circuit or a driving method of the display panel as follows:
• during a reference charging period, applying a reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, and at a first time duration after applying the reference data voltage, obtaining a benchmark voltage from the sensing line;
• and
• during a data charging period, applying a detection data voltage different from the reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, and at the first time duration after applying the detection data voltage, obtaining an initial sensing voltage from the sensing line;
• wherein a sensing voltage of the pixel circuit is obtained based on at least the benchmark voltage and the initial sensing voltage, and a threshold voltage of the driving transistor is obtained based on the sensing voltage;
• wherein a predetermined interval is set between adjacent display frames;
• and
• the reference charging period and the data charging period are both in a same predetermined interval;
• wherein the reference charging period is before the data charging period;
• a detection method of the pixel circuit or a driving method of the display panel further comprises:
• during a supplementary reference charging period, applying the reference data voltage to the gate electrode of the driving transistor to charge the sensing line through the first electrode of the driving transistor, and at the first time duration after applying the reference data voltage, obtaining a supplementary benchmark voltage from the sensing line:
• wherein the reference charging period, the supplementary reference charging period and the data charging period are all in a same predetermined interval, and the supplementary reference charging period is after the data charging period;
• and
• the sensing voltage of the pixel circuit is obtained based on the benchmark voltage, the supplementary benchmark voltage and the initial sensing voltage.