CN-117037712-B - Display substrate and display device

Abstract

A display substrate and a display device are provided. The display substrate comprises a first display area and a second display area, wherein the first display area comprises a first light-emitting unit group and a first pixel circuit group connected with the first light-emitting unit group, the second display area comprises a second light-emitting unit group and a second pixel circuit group connected with the second light-emitting unit group, the light-emitting unit group comprises a light-emitting unit, and the light-emitting unit comprises a first electrode and a second electrode. The second pixel circuit group includes a first pixel circuit unit including at least a first pixel circuit and a second pixel circuit, at least two pixel circuits in the first pixel circuit unit being configured to be electrically connected with a second electrode of the same light emitting unit. At least two pixel circuits in a second display area in the display substrate drive one light-emitting unit to emit light, so that a more uniform visual display effect of the whole screen can be realized.

Inventors

• DU LILI
• HUANG WEIBIN
• HUANG YAO
• QIU YUANYOU

Assignees

• 京东方科技集团股份有限公司
• 成都京东方光电科技有限公司

Dates

Publication Date

20260505

Application Date

20201127

Claims (16)

1. 1. A display substrate, comprising: A substrate including a first display region including a plurality of first light emitting unit groups and a plurality of first pixel circuit groups respectively connected to the plurality of first light emitting unit groups, and a second display region including a plurality of second light emitting unit groups and a plurality of second pixel circuit groups respectively connected to the plurality of second light emitting unit groups, each of the light emitting unit groups including a plurality of light emitting units including a first electrode, a light emitting layer, and a second electrode disposed in a direction perpendicular to the substrate, the second electrode being located at a side of the light emitting layer facing the substrate; a plurality of reset power supply signal lines between the second electrode and the substrate; the data lines are positioned on one side, far away from the substrate, of the reset power supply signal lines, and the extending directions of the data lines are intersected with the extending directions of the reset power supply signal lines; wherein each pixel circuit group comprises a plurality of pixel circuits, each second pixel circuit group comprises a plurality of first pixel circuit units, each first pixel circuit unit at least comprises a first pixel circuit and a second pixel circuit, at least two pixel circuits in the first pixel circuit units are configured to be electrically connected with a second electrode of the same light emitting unit, Each pixel circuit comprises a data writing transistor, a driving transistor and a first reset control transistor, wherein a first pole of the first reset control transistor is connected with the reset power supply signal line, a second pole of the first reset control transistor is connected with the second electrode, a first pole of the data writing transistor is connected with a second pole of the driving transistor, The display substrate further comprises a plurality of first connection parts, wherein a first end of at least part of the first connection parts is connected with a second pole of the data writing transistor of the first pixel circuit, a second end of at least part of the first connection parts is connected with a second pole of the data writing transistor of the second pixel circuit so that at least two data writing transistors of the first pixel circuit unit are connected with the same data line, and at least part of the first connection parts is positioned between the second pole of the data writing transistor in the first pixel circuit and the first pole of the first reset control transistor; each light emitting unit group comprises a first color light emitting unit, a second color light emitting unit pair and a third color light emitting unit, wherein the first color light emitting unit and the third color light emitting unit are arranged along the extending direction of the data line, the second color light emitting unit pair comprises two second color light emitting units arranged along the second direction, and the first color light emitting unit and the second color light emitting unit pair are arranged along the extending direction of the reset power supply signal line.
2. 2. The display substrate of claim 1, wherein the substrate further comprises a third display region including a plurality of third pixel circuit groups, the third display region including a plurality of third light emitting cell groups respectively connected to the plurality of third pixel circuit groups, and a density of the plurality of second light emitting cell groups is less than a density of the plurality of first light emitting cell groups, the density of the plurality of third light emitting cell groups is less than a density of the plurality of first light emitting cell groups; The third pixel circuit group comprises a plurality of second pixel circuit units, each second pixel circuit unit at least comprises a third pixel circuit and a fourth pixel circuit, and at least two pixel circuits in the second pixel circuit units are configured to be electrically connected with a second electrode of the same light-emitting unit; The first end of the part of the first connecting part is connected with the second pole of the data writing transistor of the third pixel circuit, the second end of the part of the first connecting part is connected with the second pole of the data writing transistor of the fourth pixel circuit so that at least two data writing transistors of the second pixel circuit unit are connected with the same data line, and the first connecting part is positioned between the second pole of the data writing transistor and the first pole of the first reset control transistor in the third pixel circuit.
3. 3. The display substrate according to claim 2, wherein each of the pixel circuits further includes a threshold compensation transistor, a first pole of the threshold compensation transistor is connected to the first pole of the driving transistor, a second pole of the threshold compensation transistor is connected to the gate of the driving transistor, and the first connection portion is located between the second pole of the threshold compensation transistor and the first pole of the first reset control transistor in the first pixel circuit.
4. 4. The display substrate according to claim 3, wherein each of the pixel circuits further includes a second connection portion and a third connection portion disposed in the same layer as the data line, the second connection portion being configured to connect a second pole of the threshold compensation transistor and a gate electrode of the driving transistor, the third connection portion being configured to connect a first pole of the first reset control transistor and the reset power supply signal line, In the first pixel circuit, a distance between edges of the second connection portion and the third connection portion, which are close to each other, in the second direction is 7-12 micrometers so as to provide the first connection portion between the second connection portion and the third connection portion.
5. 5. The display substrate of claim 3, further comprising: a plurality of power signal lines arranged on the same layer as the data lines and extending along a second direction, The first connection parts and the data lines are located on different layers, and each first connection part is overlapped with the data line and the power signal line along a third direction perpendicular to the substrate.
6. 6. The display substrate according to claim 5, wherein the first connection portion is located at the same layer as the reset power supply signal line.
7. 7. The display substrate according to claim 5, wherein each of the pixel circuits further comprises a fourth connection portion provided in the same layer as the data line, the fourth connection portion being configured to connect the first connection portion and a second pole of the data writing transistor, In at least one of the first pixel circuit unit and the second pixel circuit unit, a space is formed between the fourth connection portion of one pixel circuit and the data line in close proximity, and the fourth connection portion of the other pixel circuit and the data line are integrally formed.
8. 8. The display substrate of claim 7, further comprising: A plurality of cover portions disposed on the same layer as the first connection portion, each of the threshold compensation transistors including two gates and an active semiconductor layer between the two gates, the active semiconductor layer, the data line, and the power signal line between the cover portions and the two gates overlapping each other along the third direction, Wherein the reset power signal line extends along a first direction, and the data line extends along the second direction; an orthographic projection of the cover portion overlapping the active semiconductor layer on a first straight line extending in the first direction overlaps an orthographic projection of the first connection portion on the first straight line, and an orthographic projection of the fourth connection portion on a second straight line extending in the second direction overlaps an orthographic projection of the cover portion on the second straight line.
9. 9. The display substrate according to claim 8, wherein the first connection portion includes a main body connection portion extending in the first direction and two end portions located at both ends of the main body connection portion and extending in the second direction, the two end portions being connected to two fourth connection portions in a pixel circuit unit of at least one of the first pixel circuit unit and the second pixel circuit unit, respectively, an orthographic projection of the two end portions on the second straight line overlapping an orthographic projection of the cover portion on the second straight line.
10. 10. The display substrate of claim 9, wherein a distance between the body connection and a first pole of the threshold compensation transistor in the first pixel circuit is greater than a distance between the body connection and a first pole of the first reset control transistor in the first pixel circuit in the second direction.
11. 11. The display substrate according to any one of claims 8 to 10, wherein each of the pixel circuits further comprises a first light emitting control transistor having a first electrode electrically connected to a first electrode of the driving transistor and a fifth connection portion provided in the same layer as the data line, The second electrode of the light emitting unit located in the first display region and the second display region is electrically connected to the second electrode of the first light emitting control transistor through the fifth connection portion.
12. 12. The display substrate according to claim 11, wherein the second electrode of each of the light emitting cells of the second light emitting cell group includes a main body electrode and a connection electrode configured to be directly electrically connected with the fifth connection portion to be electrically connected with the second poles of the at least two first light emitting control transistors of the first pixel circuit unit.
13. 13. The display substrate of claim 11, further comprising: A plurality of transparent wires positioned between the second electrode and the film layer where the data wires are positioned, each transparent wire extending along the first direction, Wherein the transparent wiring is configured to connect the second electrode of the light emitting unit in the third light emitting unit group and the fifth connection portion to electrically connect the second electrode of each of the light emitting units of the third light emitting unit group with the second poles of at least two first light emitting control transistors of the second pixel circuit unit of the third pixel circuit group.
14. 14. The display substrate of claim 13, wherein the plurality of first pixel circuit groups are arranged in an array along the first direction and the second direction; the plurality of second pixel circuit groups and the plurality of third pixel circuit groups are alternately arranged along the first direction, the plurality of second pixel circuit groups and the plurality of third pixel circuit groups are alternately arranged along the second direction, and a column of the second pixel circuit groups and the third pixel circuit groups arranged along the second direction are connected with different data lines.
15. 15. The display substrate of claim 11, further comprising: A scan signal line extending along the first direction and located between the reset power signal line and the substrate; a reset control signal line extending along the first direction and arranged at the same layer as the scan signal line, and A light emission control signal line extending along the first direction and arranged in the same layer as the scanning signal line, The pixel circuit of each sub-pixel further comprises a storage capacitor, a second light-emitting control transistor and a second reset transistor; The grid electrode of the data writing transistor is electrically connected with the scanning signal line; The first pole of the storage capacitor is electrically connected with the power signal line, and the second pole of the storage capacitor is electrically connected with the grid electrode of the driving transistor; the grid electrode of the threshold compensation transistor is electrically connected with the scanning signal line; The grid electrode of the first reset transistor is electrically connected with the reset control signal line; A first pole of the second reset transistor is electrically connected with the reset power supply signal line, a second pole of the second reset transistor is electrically connected with the gate of the driving transistor, and the gate of the second reset transistor is electrically connected with the reset control signal line; A gate electrode of the first light emitting control transistor is electrically connected with the light emitting control signal line; The first electrode of the second light-emitting control transistor is electrically connected with the power supply signal line, the second electrode of the second light-emitting control transistor is electrically connected with the second electrode of the driving transistor, and the grid electrode of the second light-emitting control transistor is electrically connected with the light-emitting control signal line.
16. 16. A display device comprising the display substrate of any one of claims 1-15.

Description

Display substrate and display device The application relates to a division application of 'display substrate and display device' of Chinese patent application No. 202011356201.7 submitted by No. 11 and No. 27 in 2020. Technical Field At least one embodiment of the present disclosure relates to a display substrate and a display device. Background With the continuous pursuit of visual effects of display products, narrow-frame and even full-screen display becomes a new trend of development of current Organic Light Emitting Diode (OLED) display products. With the gradual and stable improvement of the screen ratio of many mobile phones, the comprehensive screen has become a current trend. The front camera is the key for designing the comprehensive screen, so that display products with Liu Haibing, water drop screens, hole digging screens and other screens are sequentially arranged to achieve higher screen occupation ratio, and the screen occupation ratio is improved by sacrificing the appearance of the mobile phone. Therefore, the design of the under-screen camera can ensure the appearance of the mobile phone and improve the screen occupation ratio. The under-screen camera refers to that the front-facing camera is positioned below the screen but does not affect the screen display function, and when the front-facing camera is not used, the screen above the camera can still normally display images. From the appearance, the under-screen camera does not have any camera hole, so that the full-screen display effect is truly achieved. Disclosure of Invention At least one embodiment of the present disclosure provides a display substrate and a display device. At least one embodiment of the present disclosure provides a display substrate including a first display region including a plurality of first light emitting cell groups and a plurality of first pixel circuit groups respectively connected to the plurality of first light emitting cell groups, and a second display region including a plurality of second light emitting cell groups and a plurality of second pixel circuit groups respectively connected to the plurality of second light emitting cell groups, each of the light emitting cell groups including a plurality of light emitting cells, each of the light emitting cells including a first electrode, a light emitting layer, and a second electrode disposed in a direction perpendicular to the substrate, the second electrode being located at a side of the light emitting layer facing the substrate, a plurality of reset power signal lines extending in a first direction and located between the second electrode and the substrate, and a plurality of data lines located at a side of the plurality of reset power signal lines remote from the substrate and extending in a second direction, the second direction intersecting the first direction. Each of the pixel circuit groups includes a plurality of pixel circuits, the second pixel circuit group includes a plurality of first pixel circuit units, each of the first pixel circuit units includes at least a first pixel circuit and a second pixel circuit, and at least two of the first pixel circuit units are configured to be electrically connected to a second electrode of the same light emitting unit, each of the pixel circuits includes a data writing transistor, a driving transistor, and a first reset control transistor, a first pole of the first reset control transistor is connected to the reset power supply signal line, a second pole of the first reset control transistor is connected to the second electrode, the display substrate further comprises a plurality of first connection parts, wherein at least part of first ends of the first connection parts are connected with the second poles of the data writing transistors of the first pixel circuits, at least part of second ends of the first connection parts are connected with the second poles of the data writing transistors of the second pixel circuits so that at least two data writing transistors of the first pixel circuit units are connected with the same data line, and at least part of the first connection parts are located between the second poles of the data writing transistors and the first poles of the first reset control transistors in the first pixel circuits. For example, in an embodiment of the present disclosure, the substrate further includes a third display region, the second display region includes a plurality of third pixel circuit groups, the third display region includes a plurality of third pixel circuit groups, the plurality of third pixel circuit groups are respectively connected to the plurality of third pixel circuit groups, the density of the plurality of second pixel circuit groups is smaller than that of the plurality of first pixel circuit groups, the density of the plurality of third pixel circuit groups is smaller than that of the plurality of first pixel circuit groups, the third pixel circuit groups include a pl