Display substrate and preparation method thereof, display panel, and display device

21:

• A display substrate, comprising a base substrate, and a plurality of repeating units arranged in an array on the base substrate,
• wherein each of the plurality of repeating units comprises a plurality of sub-pixels, and each of the plurality of sub-pixels comprises a light-emitting element;
• the light-emitting element comprises a first light-emitting voltage application electrode, a second light-emitting voltage application electrode, and a light-emitting layer between the first light-emitting voltage application electrode and the second light-emitting voltage application electrode;
• the plurality of sub-pixels comprise a first sub-pixel and a second sub-pixel, and a color of light emitted by the light-emitting element of the first sub-pixel is same as a color of light emitted by the light-emitting element of the second sub-pixel;
• a length of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel in a first direction is greater than a length of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel in a second direction, and a length of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel in the first direction is greater than a length of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel in the second direction;
• the length of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel in the first direction is different from the length of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel in the first direction;
• and
• the first direction is a row direction of the array and the second direction is a column direction of the array;
• or the first direction is a column direction of the array and the second direction is a row direction of the array.

22:

• The display substrate according to claim 21, further comprising an intermediate layer on the base substrate,
• wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• in a direction perpendicular to a surface of the base substrate, the pixel circuit is located between the intermediate layer and the base substrate, the light-emitting element is located on a side of the intermediate layer away from the base substrate, the intermediate layer comprises a plurality of via holes, and the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels is connected to the pixel circuit of each of the plurality of sub-pixels through a corresponding via hole of the plurality of via holes;
• the plurality of via holes comprise a first via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel and a second via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel,
• in the first direction, the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels has a first boundary and a second boundary opposite to each other;
• a minimum distance between an orthographic projection of the first via hole on the base substrate and an orthographic projection of a boundary selected from a group consisting of the first boundary and the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate is different from a minimum distance between an orthographic projection of the second via hole on the base substrate and an orthographic projection of a boundary selected from a group consisting of the first boundary and the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate.

24:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light, and the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit,
• in the first direction, the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels has a first boundary and a second boundary opposite to each other;
• a control terminal of the drive circuit of the pixel circuit of the first sub-pixel comprises an overlapped part, an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate overlaps with an orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the first sub-pixel on the base substrate;
• a control terminal of the drive circuit of the pixel circuit of the second sub-pixel comprises an overlapped part, an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate overlaps with an orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the second sub-pixel on the base substrate;
• a maximum distance between the orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the first sub-pixel on the base substrate and an orthographic projection of the first boundary of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate is a first distance, and a maximum distance between the orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the first sub-pixel on the base substrate and an orthographic projection of the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate is a second distance;
• a maximum distance between the orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the second sub-pixel on the base substrate and an orthographic projection of the first boundary of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate is a third distance, and a maximum distance between the orthographic projection of the overlapped part of the control terminal of the drive circuit of the pixel circuit of the second sub-pixel on the base substrate and an orthographic projection of the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate is a fourth distance;
• a larger distance of the first distance and the second distance is different from a larger distance of the third distance and the fourth distance.

25:

• The display substrate according to claim 21, further comprising an intermediate layer and a pixel definition layer on the base substrate,
• wherein the plurality of sub-pixels further comprise a third sub-pixel,
• each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• in a direction perpendicular to a surface of the base substrate, the pixel definition layer is located on a side of the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels away from the base substrate and comprises a plurality of openings;
• in the direction perpendicular to the surface of the base substrate, the pixel circuit is located between the intermediate layer and the base substrate, the light-emitting element is located on a side of the intermediate layer away from the base substrate, the intermediate layer comprises a plurality of via holes, and the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels is connected to the pixel circuit of each of the plurality of sub-pixels through a corresponding via hole of the plurality of via holes;
• the plurality of via holes comprise a first via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel, a second via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel, and a third via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the third sub-pixel,
• the plurality of openings comprise a first opening corresponding to the first sub-pixel, a second opening corresponding to the second sub-pixel, and a third opening corresponding to the third sub-pixel,
• a distance between a center of an orthographic projection of the third via hole on the base substrate and a center of an orthographic projection of the third opening on the base substrate is different from a distance between a center of an orthographic projection of the first via hole on the base substrate and a center of an orthographic projection of the first opening on the base substrate, and is also different from a distance between a center of an orthographic projection of the second via hole on the base substrate and a center of an orthographic projection of the second opening on the base substrate.

26:

• The display substrate according to claim 21, further comprising an intermediate layer and a pixel definition layer on the base substrate,
• wherein the plurality of sub-pixels further comprise a fourth sub-pixel,
• each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• in a direction perpendicular to a surface of the base substrate, the pixel definition layer is located on a side of the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels away from the base substrate and comprises a plurality of openings;
• in the direction perpendicular to the surface of the base substrate, the pixel circuit is located between the intermediate layer and the base substrate, the light-emitting element is located on a side of the intermediate layer away from the base substrate, the intermediate layer comprises a plurality of via holes, and the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels is connected to the pixel circuit of each of the plurality of sub-pixels through a corresponding via hole of the plurality of via holes;
• the plurality of via holes comprise a first via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel, a second via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel, and a fourth via hole corresponding to the first light-emitting voltage application electrode of the light-emitting element of the fourth sub-pixel,
• wherein the plurality of openings comprise a first opening corresponding to the first sub-pixel, a second opening corresponding to the second sub-pixel, and a fourth opening corresponding to the fourth sub-pixel,
• a distance between a center of an orthographic projection of the fourth via hole on the base substrate and a center of an orthographic projection of the fourth opening on the base substrate is different from a distance between a center of an orthographic projection of the first via hole on the base substrate and a center of an orthographic projection of the first opening on the base substrate, and is also different from a distance between a center of an orthographic projection of the second via hole on the base substrate and a center of an orthographic projection of the second opening on the base substrate.

28:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• in the first direction, the first light-emitting voltage application electrode of the light-emitting element of each of the plurality of sub-pixels has a first boundary and a second boundary opposite to each other;
• the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit and a second light-emitting control circuit,
• the second light-emitting control circuit is electrically connected to a second light-emitting control signal line, a second terminal of the drive circuit, and the first light-emitting voltage application electrode of the light-emitting element, and is configured to, under control of a second light-emitting control signal provided by the second light-emitting control signal line, turn on or off a connection between the drive circuit and the light-emitting element,
• the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel comprises an overlapped part, an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate overlaps with an orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel on the base substrate,
• the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel comprises an overlapped part, an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate overlaps with an orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel on the base substrate,
• a maximum distance between the orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel on the base substrate and an orthographic projection of the first boundary of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate is a fifth distance, and a maximum distance between the orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel on the base substrate and an orthographic projection of the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate is a sixth distance;
• a maximum distance between the orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel on the base substrate and an orthographic projection of the first boundary of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate is a seventh distance, and a maximum distance between the orthographic projection of the overlapped part of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel on the base substrate and an orthographic projection of the second boundary of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate is a eighth distance;
• a larger distance of the fifth distance and the sixth distance is different from a larger distance of the seventh distance and the eighth distance.

30:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit,
• an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate at least partially overlaps with an orthographic projection of a control terminal of the drive circuit of the pixel circuit of the first sub-pixel on the base substrate;
• and
• an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate at least partially overlaps with an orthographic projection of a control terminal of the drive circuit of the pixel circuit of the second sub-pixel on the base substrate.

31:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light;
• the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit,
• the pixel circuit of the first sub-pixel further comprises a first parasitic circuit, and the pixel circuit of the second sub-pixel further comprises a second parasitic circuit;
• the first parasitic circuit is electrically connected to a control terminal of the drive circuit of the pixel circuit of the first sub-pixel and the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel, and the first parasitic circuit is configured to control a voltage of the control terminal of the drive circuit of the pixel circuit of the first sub-pixel based on a voltage of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel;
• and
• the second parasitic circuit is electrically connected to a control terminal of the drive circuit of the pixel circuit of the second sub-pixel and the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel, and the second parasitic circuit is configured to control a voltage of the control terminal of the drive circuit of the pixel circuit of the second sub-pixel based on a voltage of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel.

32:

• The display substrate according to claim 31, wherein in each repeating unit, the first sub-pixel and the second sub-pixel are arranged in the first direction,
• the first parasitic circuit comprises a first capacitor, and the first capacitor comprises a first electrode and a second electrode;
• the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel comprises an auxiliary electrode block and a first drive electrode block, the first drive electrode block is electrically connected to the auxiliary electrode block;
• an orthographic projection of the auxiliary electrode block on the base substrate at least partially overlaps with the orthographic projection of the control terminal of the drive circuit of the pixel circuit of the first sub-pixel on the base substrate;
• the auxiliary electrode block serves as the first electrode of the first capacitor, and the control terminal of the drive circuit of the first sub-pixel is multiplexed as the second electrode of the first capacitor;
• the orthographic projection of the auxiliary electrode block on the base substrate does not overlap with an orthographic projection of the light-emitting layer of the light-emitting element of the first sub-pixel on the base substrate;
• an orthographic projection of the first drive electrode block on the base substrate, the orthographic projection of the light-emitting layer of the light-emitting element of the first sub-pixel on the base substrate, and the orthographic projection of the second light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate at least partially overlap;
• the first direction is parallel to the surface of the base substrate, and in the first direction, the auxiliary electrode block is located on a side of the first drive electrode block away from the light-emitting element of the second sub-pixel.

33:

• The display substrate according to claim 32, wherein the second parasitic circuit comprises a second capacitor, and the second capacitor comprises a first electrode and a second electrode;
• the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel comprises a second drive electrode block, and an orthographic projection of the second drive electrode block on the base substrate at least partially overlaps with the orthographic projection of the control terminal of the drive circuit of the pixel circuit of the second sub-pixel on the base substrate;
• the orthographic projection of the second drive electrode block on the base substrate, an orthographic projection of the light-emitting layer of the light-emitting element of the second sub-pixel on the base substrate, and an orthographic projection of the second light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate at least partially overlap;
• and
• the second drive electrode block is multiplexed as the first electrode of the second capacitor, and the control terminal of the drive circuit of the second sub-pixel is multiplexed as the second electrode of the second capacitor.

34:

• The display substrate according to claim 21, wherein the plurality of repeating units are arranged in the second direction to form a plurality of repeating unit groups, and the plurality of repeating unit groups are arranged in the first direction;
• in the second direction, the first sub-pixel and the second sub-pixel are located between the third sub-pixel and the fourth sub-pixel, the first direction and the second direction are parallel to the surface of the base substrate, and the first direction is perpendicular to the second direction;
• the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel comprises a first drive electrode block, a first connection electrode block, and an auxiliary electrode block;
• the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel comprises a second drive electrode block and a second connection electrode block;
• the first light-emitting voltage application electrode of the light-emitting element of the third sub-pixel comprises a third drive electrode block and a third connection electrode block;
• the first light-emitting voltage application electrode of the light-emitting element of the fourth sub-pixel comprises a fourth drive electrode block and a fourth connection electrode block;
• in the first direction, the first connection electrode block, the second connection electrode block, the third connection electrode block, and the fourth connection electrode block are located between two adjacent repeating unit groups;
• and
• in the first direction, at least a portion of the auxiliary electrode block is located on a side of the auxiliary electrode block away from the first drive electrode block and is located between two adjacent repeating units in a repeating unit group adjacent to the repeating unit group in which the auxiliary electrode block is located.

35:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light, the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit, drive circuits of the plurality of sub-pixels are arranged in an array on the base substrate;
• the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel comprises an auxiliary electrode block, a first connection electrode block, and a first drive electrode block, and the first drive electrode block, the auxiliary electrode block, and the first connection electrode block are electrically connected to each other;
• the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel further comprises a second drive electrode block and a second connection electrode block, and the second drive electrode block is electrically connected to the second connection electrode block;
• the auxiliary electrode block is located on a side of a control terminal of the drive circuit of the pixel circuit of the first sub-pixel away from the base substrate;
• and
• the second drive electrode block is located on a side of a control terminal of the drive circuit of the pixel circuit of the second sub-pixel away from the base substrate.

37:

• The display substrate according to claim 21, wherein each of the plurality of sub-pixels further comprises a pixel circuit for driving the light-emitting element to emit light, the pixel circuit of each of the plurality of sub-pixels comprises a drive circuit, a second light-emitting control circuit, and a reset circuit,
• the second light-emitting control circuit is electrically connected to a second light-emitting control signal line, a second terminal of the drive circuit, and the first light-emitting voltage application electrode of the light-emitting element, and is configured to, under control of a second light-emitting control signal provided by the second light-emitting control signal line, turn on or off a connection between the drive circuit and the light-emitting element,
• the reset circuit is electrically connected to a control terminal of the drive circuit and a first reset control signal line, and is configured to reset the control terminal of the drive circuit under control of a first sub-reset control signal provided by the first reset control signal line,
• the second light-emitting control signal line and the first reset control signal line are arranged along the first direction,
• an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate at least partially overlaps with both an orthographic projection of the first reset control signal line connected to the reset circuit of the pixel circuit of the second sub-pixel on the base substrate and an orthographic projection of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel on the base substrate, and
• an orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel on the base substrate at least partially overlaps with an orthographic projection of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel on the base substrate.

38:

• The display substrate according to claim 37, wherein the pixel circuit of each of the plurality of sub-pixels further comprises a data writing circuit,
• the data writing circuit is electrically connected to a first terminal of the drive circuit and a first scanning signal line, and is configured to write a data signal to the control terminal of the drive circuit under control of a scanning signal provided by the first scanning signal line,
• in the first direction, the first scanning signal line is located between the second light-emitting control signal line and the first reset control signal line,
• the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel and the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel are arranged along the first direction, and
• in the first direction, the first scanning signal line connected to the data writing circuit of the pixel circuit of the second sub-pixel is located between the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel and the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel.

39:

• The display substrate according to claim 37, wherein the reset circuit is further electrically connected to a first reset power supply signal line,
• the reset circuit is configured to reset the control terminal of the drive circuit according to a first reset signal provided by the first reset power supply signal line under control of the first sub-reset control signal provided by the first reset control signal line,
• in the first direction, the first reset power supply signal line is located on a side of the first reset control signal line away from the second light-emitting control signal line, and
• the orthographic projection of the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel on the base substrate further at least partially overlaps with an orthographic projection of the first reset power supply signal line connected to the reset circuit of the pixel circuit of the second sub-pixel on the base substrate;
• the first light-emitting voltage application electrode of the light-emitting element of the first sub-pixel further comprises a first drive electrode block, an auxiliary electrode block and a first connection electrode block, and the first drive electrode block, the auxiliary electrode block, and the first connection electrode block are electrically connected to each other and arranged in the first direction,
• the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel further comprises a second drive electrode block and a second connection electrode block, and the second drive electrode block and the second connection electrode block are electrically connected and arranged in the first direction,
• an orthographic projection of the first drive electrode block on the base substrate at least partially overlaps with the orthographic projection of the first reset control signal line connected to the reset circuit of the pixel circuit of the second sub-pixel on the base substrate and the orthographic projection of the first reset power supply signal line connected to the reset circuit of the pixel circuit of the second sub-pixel on the base substrate,
• an orthographic projection of the first connection electrode block on the base substrate at least partially overlaps with the orthographic projection of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel on the base substrate,
• in the first direction, the auxiliary electrode block is located on a side of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the first sub-pixel away from the first light-emitting voltage application electrode of the light-emitting element of the second sub-pixel,
• an orthographic projection of the second connection electrode block on the base substrate at least partially overlaps with the orthographic projection of the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel on the base substrate, and
• in the first direction, the second drive electrode block is located between the second light-emitting control signal line connected to the second light-emitting control circuit of the pixel circuit of the second sub-pixel and the first scanning signal line connected to the data writing circuit of the pixel circuit of the second sub-pixel.