Display substrate and display device

1. A display substrate, comprising a display region and a peripheral region, the peripheral region comprising a capacitor region, a circuit region, a fan-out region and a joint region, wherein

the display region is provided with:

a plurality of sub-pixels;

a plurality of data lines extending along a first direction, each of the plurality of data lines being coupled to multiple sub-pixels; and

a plurality of gate lines extending in a second direction intersecting the first direction, each of the plurality of gate lines being coupled to multiple sub-pixels,

the circuit region is provided with a first sub-region and a second sub-region which are opposite to each other at two sides of the display region along the first direction, respectively,

the first sub-region is provided with a plurality of multiplexing unit groups configured to provide data signals to the plurality of data lines, and each of the multiplexing unit groups comprises at least one multiplexing unit;

the second sub-region is provided with a plurality of testing unit groups configured to provide testing signals to the plurality of data lines, and each of the plurality of testing unit groups comprises at least one testing unit;

the circuit region is further provided with a plurality of driving unit groups, each of the driving unit groups comprises at least one driving unit; the driving unit groups and the multiplexing unit groups are alternately arranged in the first sub-region along an extending direction of the first sub-region, and the driving unit groups and the testing unit groups are alternately arranged in the second sub-region along an extending direction of the second sub-region;

the capacitor region is between the second sub-region and the display region, and is provided with a plurality of compensation capacitor units, and each of the plurality of compensation capacitor units is coupled to one of the plurality of data lines,

the joint region is on a side of the first sub-region distal to the display region and comprises a plurality of joints, at least some of the plurality of joints are coupled to signal lines, the signal lines comprise multiplexing signal lines coupled to multiplexing units, testing signal lines coupled to testing units and driving signal lines coupled to driving units; and

the fan-out region is between the joint region and the first sub-region, and is provided with the multiplexing signal lines.

2. The display substrate of claim 1 , wherein

the first sub-region comprises a first arc region, the second sub-region comprises a second arc region, and an edge of the first arc region proximal to the display region is closer to a center of the display region than an edge of the second arc region proximal to the display region.

3. The display substrate of claim 2 , wherein

the first arc region has a same circle center as the second arc region, and a radius of the edge of the first arc region proximal to the display region is smaller than a radius of the edge of the second arc region proximal to the display region by 210 μm˜420 μm.

4. The display substrate of claim 3 , wherein

in the first sub-region, the multiplexing unit groups comprise first multiplexing unit groups and second multiplexing unit groups, each of the first multiplexing unit groups comprises M multiplexing units, each of the second multiplexing unit groups comprises N multiplexing units, N and M are integers each greater than 1, and M<N, the second multiplexing unit groups are in the middle of the first sub-region, the first multiplexing unit groups are at two ends of the first sub-region distal to the middle of the first sub-region; and/or

in the second sub-region, the testing unit groups comprise first testing unit groups and second testing unit groups, each of the first testing unit groups comprises K testing units, each of the second testing unit groups comprises L testing units, L and K are integers each greater than 1, and K<L, the second testing unit groups are in the middle of the second sub-region, and the first testing unit groups are at two ends of the second sub-region distal to the middle of the second sub-region.

5. The display substrate of claim 4 , wherein

the circuit region is divided into a first half region and a second half region which are opposite to each other at two sides of the display region along the second direction;

the driving units comprise a plurality of gate driving units; and

the first half region is provided with multiple gate driving units configured to provide a gate driving signal to the plurality of gate lines.

6. The display substrate of claim 5 , wherein

the display region is further provided with a plurality of control electrode lines extending along the second direction, and each of the plurality of control electrode line is coupled to multiple sub-pixels;

the driving units further comprises a plurality of control electrode driving units; and

the second half region is provided with a plurality of control electrode driving units configured to provide a control electrode driving signal to the plurality of control electrode lines.

7. The display substrate of claim 6 , wherein

the multiplexing signal lines comprise a plurality of multiplexing control lines and a plurality of multiplexing data lines;

at least one of the multiplexing units includes a plurality of multiplexing transistors; a gate of each of the plurality of multiplexing transistors is coupled to one of the multiplexing control lines, a first electrode of each of the multiplexing transistors is coupled to one of the data lines, and a second electrode of each of the multiplexing transistors is coupled to one of the multiplexing data lines; and

second electrodes of all multiplexing transistors in a same multiplexing unit are coupled to a same multiplexing data line, and second electrodes of the multiplexing transistors in different multiplexing units are coupled to different multiplexing data lines.

8. The display substrate claim 7 , wherein

the testing signal lines comprise testing control lines and testing data lines;

at least one of the testing units comprises a plurality of testing transistors; a gate of each of the plurality of testing transistors is coupled to one of the testing control lines, a first electrode of each of the plurality of testing transistors is coupled to one of the data lines, and a second electrode of each of the plurality of testing transistors is coupled to one of the testing data line; and

each of the testing data lines is coupled to multiple testing units.

9. The display substrate of claim 8 , wherein

the testing signal lines are on a side of the circuit region distal to the display region; and

the driving signal lines are on a side of the circuit region distal to the display region.

10. The display substrate of claim 9 , wherein

ends of the first sub-region closest to the second sub-region are closer to the display region than ends of the second sub-region closest to the first sub-region.

11. The display substrate of claim 10 , wherein the circuit region further comprises:

connection sub-regions which are between and coupled to the ends of the first sub-region closest to the second sub-region and the ends of the second sub-region closest to the first sub-region.

12. The display substrate of claim 11 , further comprising at least one polysilicon resistor, wherein

each of the at least one polysilicon resistor is between and coupled to two of the signal lines, the polysilicon resistor is on a side of the end of the first sub-region closest to the second sub-region, distal to the display region, or the polysilicon resistor is on a side of the connection sub-region distal to the display region.

13. The display substrate of claim 12 , wherein

the testing signal lines are on a side of the circuit region distal to the display region;

the driving signal lines are on a side of the circuit region distal to the display region; and

the polysilicon resistor is on a side of the testing signal lines and the driving signal lines distal to the display region.

14. The display substrate of claim 11 , further comprising at least one electrostatic discharge unit, wherein

each of the at least one electrostatic discharge unit is coupled to one of the signal lines and configured to release static charges in the signal line to which it is coupled; the electrostatic discharge unit is on a side of the end of the first sub-region closest to the second sub-region, distal to the display region, or the electrostatic discharge unit is on a side of the connection sub-region distal to the display region.

15. The display substrate of claim 14 , wherein

the testing signal lines are on a side of the circuit region distal to the display region; the driving signal lines are on a side of the circuit region distal to the display region; and the electrostatic discharge units are on a side of the testing signal lines and the driving signal lines distal to the display region.

16. The display substrate of claim 14 , wherein

the multiplexing signal lines comprise a plurality of multiplexing control lines and a plurality of multiplexing data lines; and

the signal lines coupled to each of electrostatic discharge units are the testing signal lines or the multiplexing control lines.

17. The display substrate of claim 14 , wherein

the driving signal lines comprise a high level line and a low level line, the high level line is coupled to a high level signal source, and the low level line is coupled to a low level signal source; and

each of the electrostatic discharge units comprises a first discharge transistor and a second discharge transistor; a gate and a first electrode of the first discharge transistor are coupled to the high level line, and a second electrode of the first discharge transistor is coupled to the signal line corresponding to the electrostatic discharge unit; and a gate and a first electrode of the second discharge transistor are coupled to the signal line corresponding to the electrostatic discharge unit, and a second electrode of the second discharge transistor is coupled to the low level line.

18. The display substrate of claim 15 , wherein

at least some of different data lines are coupled to different numbers of sub-pixels; and

except for the data line coupled to a largest number of sub-pixels, each of the remaining data lines is coupled to one of the compensation capacitor units.

19. The display substrate of claim 18 , wherein

each of the compensation capacitor units comprises one or more compensation capacitors;

except for the data line coupled to the largest number of sub-pixels, the number n of the compensation capacitors in the compensation capacitor unit coupled to each of the remaining data lines, satisfies:

N=N max− N;

wherein Nmax is the number of the sub-pixels coupled to the data line coupled to the largest number of the sub-pixels, and N is the number of the sub-pixels coupled to the data line coupled to the compensation capacitor unit.

20. The display substrate of claim 19 , wherein

the data line is coupled to first electrodes of all the compensation capacitors in the compensation capacitor unit coupled to the data line; and

second electrodes of all the compensation capacitors in the compensation capacitor unit are coupled to a same constant level signal line; or

wherein

multiple sub-pixels coupled to each of the data lines are arranged in a column along the first direction; and

the compensation capacitor unit coupled to each of the data lines is between a column of sub-pixels coupled to the data line and the second sub-region along the first direction.