Display substrate and display device

A display substrate, comprising:

• a base substrate, comprising a display region and a non-display region;
• a plurality of sub-pixels in the display region of the base substrate, wherein each of the plurality of sub-pixels comprises a pixel circuit, the pixel circuit is configured to drive a light-emitting element to emit light, and pixels circuits of the plurality of sub-pixels are arranged in a plurality of rows and a plurality of columns along a first direction and a second direction;
• the pixel circuit comprises a driving sub-circuit, a data writing sub-circuit, a compensation sub-circuit, and a storage sub-circuit;
• the driving sub-circuit comprises a control terminal, a first terminal, and a second terminal, and is configured to be connected to the light-emitting element and control a driving current flowing through the light-emitting element;
• the data writing sub-circuit comprises a control terminal, a first terminal, and a second terminal, the control terminal of the data writing sub-circuit is configured to receive a first scanning signal, the first terminal of the data writing sub-circuit is configured to receive a data signal, the second terminal of the data writing sub-circuit is electrically connected to the driving sub-circuit, and the data writing sub-circuit is configured to write the data signal into the first terminal of the driving sub-circuit in response to the first scanning signal;
• the compensation sub-circuit comprises a control terminal, a first terminal, and a second terminal, the control terminal of the compensation sub-circuit is configured to receive a second scanning signal, the first terminal and the second terminal of the compensation sub-circuit are electrically connected to the control terminal and the second terminal of the driving sub-circuit, respectively, and the compensation sub-circuit is configured to perform threshold compensation on the driving sub-circuit in response to the second scanning signal;
• and
• the storage sub-circuit is electrically connected to the control terminal of the driving sub-circuit and a first voltage terminal and is configured to store the data signal, the storage sub-circuit comprises a storage capacitor, the storage capacitor comprises a first electrode and a second electrode, the first electrode of the storage capacitor is electrically connected to the first voltage terminal, and the second electrode of the storage capacitor is electrically connected to the control terminal of the driving sub-circuit;
• a first power line, wherein the first power line is in the display region and extended along the first direction, and the first power line is connected to the first voltage terminal, and is configured to provide a first power voltage for the plurality of sub-pixels;
• and
• an electrical connection layer, on a side of the pixel circuit away from the base substrate, wherein the electrical connection layer comprises a first portion in the display region, the first portion comprises a plurality of first connection electrodes, and the plurality of first connection electrodes are arranged in one-to-one correspondence with the plurality of sub-pixels, respectively:
• the pixel circuit of each sub-pixel is electrically connected to a corresponding first connection electrode through a first via hole, and the first connection electrode corresponding to the each sub-pixel is configured to be electrically connected to the light-emitting element through a second via hole, so as to electrically connect the pixel circuit of the each sub-pixel to the light-emitting element;
• the first via hole and the second via hole are not overlapped in a direction perpendicular to the base substrate;
• and
• the first portion of the electrical connection layer and the first power line are not overlapped in the direction perpendicular to the base substrate;
• the sub-pixel further comprises a first light-emitting control sub-circuit, the first light-emitting control sub-circuit comprises a control terminal, a first terminal, and a second terminal, the first terminal of the first light-emitting control sub-circuit is electrically connected to the driving sub-circuit, the second terminal of the first light-emitting control sub-circuit is configured to be electrically connected to the first connection electrode through a third via hole, and the control terminal of the first light-emitting control sub-circuit is configured to receive a first light-emitting control signal;
• the first light-emitting control sub-circuit is configured to allow the driving current to be applied to the light-emitting element in response to the first light-emitting control signal;
• and
• the first via hole, the second via hole, and the third via hole are not overlapped with each other in the direction perpendicular to the base substrate;
• the display substrate further comprises a first light-emitting control line,
• the first light-emitting control line is extended along the second direction and is connected to the control terminal of the first light-emitting control sub-circuit to provide the first light-emitting control signal, and
• an orthographic projection of the first via hole on the base substrate and an orthographic projection of the second via hole on the base substrate are on both sides of an orthographic projection of the first light-emitting control line on the base substrate, respectively.

A display substrate, comprising:

• a base substrate, comprising a display region and a non-display region;
• a plurality of sub-pixels in the display region of the base substrate, wherein each of the plurality of sub-pixels comprises a pixel circuit, the pixel circuit is configured to drive a light-emitting element to emit light, and pixels circuits of the plurality of sub-pixels are arranged in a plurality of rows and a plurality of columns along a first direction and a second direction;
• the pixel circuit comprises a driving sub-circuit, a data writing sub-circuit, a compensation sub-circuit, and a storage sub-circuit;
• the driving sub-circuit comprises a control terminal, a first terminal, and a second terminal, and is configured to be connected to the light-emitting element and control a driving current flowing through the light-emitting element;
• the data writing sub-circuit comprises a control terminal, a first terminal, and a second terminal, the control terminal of the data writing sub-circuit is configured to receive a first scanning signal, the first terminal of the data writing sub-circuit is configured to receive a data signal, the second terminal of the data writing sub-circuit is electrically connected to the driving sub-circuit, and the data writing sub-circuit is configured to write the data signal into the first terminal of the driving sub-circuit in response to the first scanning signal;
• the compensation sub-circuit comprises a control terminal, a first terminal, and a second terminal, the control terminal of the compensation sub-circuit is configured to receive a second scanning signal, the first terminal and the second terminal of the compensation sub-circuit are electrically connected to the control terminal and the second terminal of the driving sub-circuit, respectively, and the compensation sub-circuit is configured to perform threshold compensation on the driving sub-circuit in response to the second scanning signal;
• and
• the storage sub-circuit is electrically connected to the control terminal of the driving sub-circuit and a first voltage terminal and is configured to store the data signal, the storage sub-circuit comprises a storage capacitor, the storage capacitor comprises a first electrode and a second electrode, the first electrode of the storage capacitor is electrically connected to the first voltage terminal, and the second electrode of the storage capacitor is electrically connected to the control terminal of the driving sub-circuit;
• a first power line, wherein the first power line is in the display region and extended along the first direction, and the first power line is connected to the first voltage terminal, and is configured to provide a first power voltage for the plurality of sub-pixels;
• and
• an electrical connection layer, on a side of the pixel circuit away from the base substrate, wherein the electrical connection layer comprises a first portion in the display region, the first portion comprises a plurality of first connection electrodes, and the plurality of first connection electrodes are arranged in one-to-one correspondence with the plurality of sub-pixels, respectively:
• the pixel circuit of each sub-pixel is electrically connected to a corresponding first connection electrode through a first via hole, and the first connection electrode corresponding to the each sub-pixel is configured to be electrically connected to the light-emitting element through a second via hole, so as to electrically connect the pixel circuit of the each sub-pixel to the light-emitting element;
• the first via hole and the second via hole are not overlapped in a direction perpendicular to the base substrate;
• and
• the first portion of the electrical connection layer and the first power line are not overlapped in the direction perpendicular to the base substrate;
• the non-display region comprises a bonding region, the electrical connection layer further comprises a second portion in the non-display region, and the second portion of the electrical connection layer comprises a bonding electrode in the non-display region;
• and
• the display substrate further comprises an auxiliary bonding electrode, the auxiliary bonding electrode is in a same layer and of a same material as the first power line, and the auxiliary bonding electrode contacts with the bonding electrode for connection;
• the second portion of the electrical connection layer further comprises a wire in the non-display region, one end of the wire is connected to the bonding electrode, and another end of the wire is extended to the display region;
• and the non-display region further comprises a bending region, and a part of the wire is in the bending region;
• the display substrate further comprises an organic insulating layer,
• wherein the organic insulating layer is between the electrical connection layer and the pixel circuit, and the first via hole is in the organic insulating layer;
• and
• the organic insulating layer comprises a bending portion in the bending region, and the bending portion is on a side of the wire close to the base substrate and is in direct contact with the base substrate.