Display substrate configured with different drive modes, driving method thereof, and display apparatus

A display apparatus, comprising:

• a display substrate, wherein drive modes for the display substrate comprise:
• a first drive mode and a second drive mode, wherein a refresh rate of the display substrate in the first drive mode is less than a refresh rate of the display substrate in the second drive mode, wherein the display substrate is configured to display a plurality of display frames, wherein in the first drive mode, the display frames comprise:
• a refresh frame and at least one maintain frame;
• wherein the display substrate comprises pixel circuits arranged in an array, the pixel circuits comprise a data signal line and a first initial signal line;
• wherein the first initial signal line provides a first initial signal in the refresh frame and the maintain frame, wherein the first initial signal is an Alternating Current (AC) signal;
• and
• wherein the pixel circuits further comprise a second initial signal line, the second initial signal line provides a second initial signal in the refresh frame and the maintain frame, wherein the second initial signal is a Direct Current (DC) signal, and a voltage value of the second initial signal is constant.