Pixel circuit and driving method thereof, and display panel and driving method thereof

A drive method for a display panel, wherein:

• the display panel comprises:
• pixel circuits arranged in array, a plurality of current data lines, a plurality of time-length data lines, a first current selection signal line, a second current selection signal line, a first time-length selection signal line and a second time-length selection signal line;
• the pixel circuits are respectively connected with the current data lines and the time-length data lines, at least one current data line is connected with the first current selection signal line or the second current selection signal line, two adjacent current data lines are connected with different current selection signal lines, at least one time-length data line is connected with the first time-length selection signal line or the second time-length selection signal line, and two adjacent time-length data lines are connected with different time-length selection signal lines;
• the method comprises:
• providing a valid level signal to the first time-length selection signal line, the second time-length selection signal line, the first current selection signal line and the second current selection signal line;
• and
• time for at least two signal lines of the first time-length selection signal line, the second time-length selection signal line, the first current selection signal line and the second current selection signal line to receive the valid level signal is not overlapped.