US-12622055-B2 - Display panel and display device

Abstract

A display panel and a display device are provided. A pixel driving circuit included in the display panel includes a switch transistor, a driving transistor, a compensation transistor, and a first capacitor which are interconnected. A first electrode of the compensation transistor is connected to a gate of the driving transistor, and a compensation gate of the compensation transistor is connected to a first control signal line. A first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line.

Inventors

• Cheng Wang

Assignees

• WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.

Dates

Publication Date

20260505

Application Date

20240226

Priority Date

20240208

Claims (20)

1. 1 . A display panel, comprising: a plurality of sub-pixel units, each of the sub-pixel units comprising a light-emitting device and a pixel driving circuit connected to the light-emitting device, wherein each of the pixel driving circuits comprises: a switch transistor, wherein a first electrode of the switch transistor is connected to a first data signal line, and a second electrode of the switch transistor is connected to a first node; a driving transistor, wherein a first electrode of the driving transistor is connected to the first node, a second electrode of the driving transistor is connected to a second node, and a drive gate of the driving transistor is connected to a third node; a compensation transistor, wherein a first electrode of the compensation transistor is connected to the third node, a second electrode of the compensation transistor is connected to the second node, and a compensation gate of the compensation transistor is connected to a first control signal line; and a first capacitor, wherein a first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line, wherein the first high potential line comprises the first sub-plate and the second sub-plate, arranged along the second direction; an orthographic projection of the drive gate projected on the first high potential line is located within the first sub-plate, while an orthographic projection of the first plate projected on the first high potential line is located within the second sub-plate; wherein in the second direction, a width of the second sub-plate is greater than a width of the first sub-plate.
2. 2 . The display panel according to claim 1 , further comprising: a base substrate; a first gate layer, disposed on one side of the base substrate; a second gate layer, disposed on one side of the first gate layer away from the base substrate; a third gate layer, disposed on one side of the second gate layer away from the first gate layer; a first source-drain layer, disposed on one side of the third gate layer away from the second gate layer; and a second source-drain layer, disposed on one side of the first source-drain layer away from the third gate layer; wherein the first plate is disposed in at least one of the third gate layer and the first source-drain layer, and the second plate is disposed in the second source-drain layer.
3. 3 . The display panel according to claim 2 , wherein the second source-drain layer comprises a plurality of first high potential lines arranged along a first direction and extending along the second direction, the third gate layer comprises the compensation gate and a first conductive segment, one end of the first conductive segment is electrically connected to the compensation gate, and another end of the first conductive segment is electrically connected to the first control signal line; wherein the compensation gate serves as a first subpart of the first plate, an orthographic projection of the first subpart projected on the second source-drain layer is located within the first high potential line, and an angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.
4. 4 . The display panel according to claim 3 , wherein the first conductive segment serves as a second subpart of the first plate, and an orthographic projection of the second subpart projected on the second source-drain layer is located within the first high potential line.
5. 5 . The display panel according to claim 4 , wherein the first source-drain layer comprises the first control signal line and a second control signal line, both the first control signal line and the second control signal line extend along the first direction, the first control signal line and the second control signal line are arranged spaced apart along the second direction, and the second control signal line is connected to a switch gate of the switch transistor; wherein both the compensation gate and the first conductive segment are disposed between the first control signal line and the second control signal line, the compensation gate extends along the first direction, and the first conductive segment extends along the second direction.
6. 6 . The display panel according to claim 5 , wherein the first control signal line comprises a third subpart of the first plate, and an orthographic projection of the third subpart projected on the second source-drain layer is located within the first high potential line.
7. 7 . The display panel according to claim 6 , wherein the first source-drain layer further includes a fourth subpart of the first plate, the fourth subpart extends along the second direction, one end of the fourth subpart is electrically connected to the first control signal line, and another end of the fourth subpart is electrically connected to the second subpart; wherein an orthographic projection of the fourth subpart projected on the second source-drain layer is located within the first high potential line.
8. 8 . The display panel according to claim 1 , wherein the pixel driving circuit further comprises: a storage capacitor, comprising a third plate and a fourth plate, wherein the third plate is connected to the third node, and the fourth plate is connected to the first high potential line; a first reset transistor, wherein a first electrode of the first reset transistor is connected to a first reset signal line, and a second electrode of the first reset transistor is connected to the third node; a second reset transistor, wherein a first electrode of the second reset transistor is connected to a second reset signal line, and a second electrode of the second reset transistor is connected to an anode of the light-emitting device; a third reset transistor, wherein a first electrode of the third reset transistor is connected to a third reset signal line, and a second electrode of the third reset transistor is connected to the first node; a first light-emitting transistor, wherein a first electrode of the first light-emitting transistor is connected to the first high potential line, and a second electrode of the first light-emitting transistor is connected to the first node, and a gate of the first light-emitting transistor is connected to a light-emitting signal line; a second light-emitting transistor, wherein a first electrode of the second light-emitting transistor is connected to the second node, a second electrode of the second light-emitting transistor is connected to an anode of the light-emitting device, and a gate of the second light-emitting transistor is connected to the light-emitting signal line; and a boost capacitor, comprising a fifth plate and a sixth plate, wherein the fifth plate is connected to the third node, and the sixth plate is connected to the second control signal line.
9. 9 . The display panel according to claim 8 , wherein a capacitance value of the first capacitor is less than a capacitance value of the storage capacitor, and the capacitance value of the boost capacitor is less than the capacitance value of the storage capacitor.
10. 10 . The display panel according to claim 8 , wherein a first gate layer of the display panel comprises a light-emitting signal line, a first reset signal line, a third reset signal line, and a fourth control signal line; the light-emitting signal line, the first reset signal line, the third reset signal line, and the fourth control signal line all extend along the first direction; and the third reset signal line, the fourth control signal line, the light-emitting signal line, and the first reset signal line are arranged at intervals along the second direction.
11. 11 . The display panel according to claim 10 , wherein a first active layer of the display panel comprises a switch active part of the switch transistor, a drive active part of the driving transistor, a second reset active part of the second reset transistor, a third reset active part of the third reset transistor, a first light-emitting active part of the first light-emitting transistor, and a second light-emitting active part of the second light-emitting transistor; wherein the switch active part, the drive active part, the second reset active part, the first light-emitting active part, and the second light-emitting active part are interconnected; the switch active part, the second reset active part, the third reset active part, the first light-emitting active part, and the second light-emitting active part extend along the second direction; and the drive active part is disposed between the first light-emitting active part and the second light-emitting active part.
12. 12 . The display panel according to claim 11 , wherein a second gate layer of the display panel comprises a fourth plate of the storage capacitor, a first shading unit of the compensation transistor, and a second shading unit of the first reset transistor, arranged along the second direction; the fourth plate, the first shading unit, and the second shading unit are disposed between the light-emitting signal line and the first reset signal line; the third plate is disposed close to the light-emitting signal line, and the second shading unit is disposed close to the first reset signal line; and the first shading unit is located between the second shading unit and the fourth plate.
13. 13 . The display panel according to claim 12 , wherein the second gate layer further comprises two first electrical connection segments disposed on two sides of the fourth plate, the two first electrical connection segments extend along the first direction, and in two adjacent ones of the sub-pixel units arranged along the first direction, the fourth plates in the two adjacent sub-pixel units are electrically connected through the first electrical connection segment.
14. 14 . The display panel according to claim 12 , wherein a second active layer of the display panel comprises a compensation active part of the compensation transistor and a first reset active part of the first reset transistor, both the compensation active part and the first reset active part extend along the second direction, a first end of the compensation active part is connected to a first end of the first reset active part, and a second end of the first reset active part extends towards the first reset signal line and overlaps with the first reset signal line.
15. 15 . The display panel according to claim 14 , wherein the second active layer further comprises a first extension segment and a second extension segment connected to a second end of the first reset active part; the first extension segment extends along the second direction towards a location of the storage capacitor and is set apart from the storage capacitor; and the second extension segment extends along the first direction and at least partially overlaps with the first reset signal line.
16. 16 . The display panel according to claim 14 , wherein a third gate layer of the display panel comprises a compensation gate of the compensation transistor and a first reset gate of the first reset transistor; an area of the compensation gate is smaller than an area of the first shading unit; an orthographic projection of the compensation gate projected on the first shading unit is located within the first shading unit; an area of the first reset gate is smaller than an area of the second shading unit; and an orthographic projection of the first reset gate projected on the second shading unit is located within the second shading unit.
17. 17 . The display panel according to claim 16 , wherein the third gate layer further comprises a first conductive segment connected to the compensation gate, and a second conductive segment connected to the first reset gate; the first conductive segment extends along the second direction towards a side away from the compensation gate; and the second conductive segment extends along the second direction towards a side away from the first reset gate.
18. 18 . The display panel according to claim 17 , wherein the first source-drain layer of the display panel comprises the second reset signal line, a fifth control signal line, a second high potential line, the second control signal line, the first control signal line, and a third control signal line, arranged along the second direction; the second reset signal line, the fifth control signal line, the second high potential line, the second control signal line, the first control signal line, and the third control signal line all extend along the first direction.
19. 19 . A display device, comprising a display panel, wherein the display panel comprises a plurality of sub-pixel units, and each of the sub-pixel units comprises a light-emitting device and a pixel driving circuit connected to the light-emitting device, wherein each of the pixel driving circuits comprises: a switch transistor, wherein a first electrode of the switch transistor is connected to a first data signal line, and a second electrode of the switch transistor is connected to a first node; a driving transistor, wherein a first electrode of the driving transistor is connected to the first node, a second electrode of the driving transistor is connected to a second node, and a drive gate of the driving transistor is connected to a third node; a compensation transistor, wherein a first electrode of the compensation transistor is connected to the third node, a second electrode of the compensation transistor is connected to the second node, and a compensation gate of the compensation transistor is connected to a first control signal line; a first capacitor, wherein a first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line, wherein the first high potential line comprises the first sub-plate and the second sub-plate, arranged along the second direction; an orthographic projection of the drive gate projected on the first high potential line is located within the first sub-plate, while an orthographic projection of the first plate projected on the first high potential line is located within the second sub-plate; and wherein in the second direction, a width of the second sub-plate is greater than a width of the first sub-plate.
20. 20 . A display panel, comprising: a plurality of sub-pixel units, each of the sub-pixel units comprising a light-emitting device and a pixel driving circuit connected to the light-emitting device, wherein each of the pixel driving circuits comprises: a switch transistor, wherein a first electrode of the switch transistor is connected to a first data signal line, and a second electrode of the switch transistor is connected to a first node; a driving transistor, wherein a first electrode of the driving transistor is connected to the first node, a second electrode of the driving transistor is connected to a second node, and a drive gate of the driving transistor is connected to a third node; a compensation transistor, wherein a first electrode of the compensation transistor is connected to the third node, a second electrode of the compensation transistor is connected to the second node, and a compensation gate of the compensation transistor is connected to a first control signal line; a first capacitor, wherein a first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line; a base substrate; a first gate layer, disposed on one side of the base substrate; a second gate layer, disposed on one side of the first gate layer away from the base substrate; a third gate layer, disposed on one side of the second gate layer away from the first gate layer; a first source-drain layer, disposed on one side of the third gate layer away from the second gate layer; and a second source-drain layer, disposed on one side of the first source-drain layer away from the third gate layer; wherein the first plate is disposed in at least one of the third gate layer and the first source-drain layer, and the second plate is disposed in the second source-drain layer; wherein the second source-drain layer comprises a plurality of first high potential lines arranged along a first direction and extending along the second direction, the third gate layer comprises the compensation gate and a first conductive segment, one end of the first conductive segment is electrically connected to the compensation gate, and another end of the first conductive segment is electrically connected to the first control signal line; wherein the compensation gate serves as a first subpart of the first plate, an orthographic projection of the first subpart projected on the second source-drain layer is located within the first high potential line, and an angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

Description

TECHNICAL FIELD The present application relates to afield of display technology, and in particular, to display panel and a display device. DESCRIPTION OF RELATED ART Organic light-emitting diode (OLED) display technology is a new type of display technology that has gradually gained attention for its unique advantages of low power consumption, high saturation, fast response time, and wide viewing angle, occupying a certain position in the field of panel display technology. In related technologies, the pixel driving circuit of an OLED display panel usually includes a switch transistor, a driving transistor, and a compensation transistor. A drain of the switch transistor is connected to a data line, and a gate of the compensation transistor is connected to a control signal line. There is an overlapping area between the data line and the control signal line. When a voltage input to the data line changes, a coupling capacitance between the data line and the control signal line causes a voltage signal on the control signal line to change, resulting in abnormal turning on of the compensation transistor, thereby affecting a potential of the gate of the driving transistor and causing display anomalies of the display panel. SUMMARY OF INVENTION The present application provides a display panel and a display device for addressing technical issues of display anomalies of existing display panels. Accordingly, the present application provides the following technical solutions. The present application provides a display panel, including a plurality of sub-pixel units, each of the sub-pixel units including a light-emitting device and a pixel driving circuit connected to the light-emitting device, wherein each of the pixel driving circuits includes: a switch transistor, wherein a first electrode of the switch transistor is connected to a first data signal line, and a second electrode of the switch transistor is connected to a first node;a driving transistor, wherein a first electrode of the driving transistor is connected to the first node, a second electrode of the driving transistor is connected to a second node, and a drive gate of the driving transistor is connected to a third node;a compensation transistor, wherein a first electrode of the compensation transistor is connected to the third node, a second electrode of the compensation transistor is connected to the second node, and a compensation gate of the compensation transistor is connected to a first control signal line; anda first capacitor, wherein a first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line. The present application further provides a display device. The display device includes a display panel, wherein the display panel includes a plurality of sub-pixel units, and each of the sub-pixel units includes a light-emitting device and a pixel driving circuit connected to the light-emitting device, wherein each of the pixel driving circuits includes: a switch transistor, wherein a first electrode of the switch transistor is connected to a first data signal line, and a second electrode of the switch transistor is connected to a first node;a driving transistor, wherein a first electrode of the driving transistor is connected to the first node, a second electrode of the driving transistor is connected to a second node, and a drive gate of the driving transistor is connected to a third node;a compensation transistor, wherein a first electrode of the compensation transistor is connected to the third node, a second electrode of the compensation transistor is connected to the second node, and a compensation gate of the compensation transistor is connected to a first control signal line; anda first capacitor, wherein a first plate of the first capacitor is connected to the first control signal line, and a second plate of the first capacitor is connected to a first high potential line. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic structural view of a display panel in the present application. FIG. 2 is an equivalent circuit diagram of a pixel driving circuit in the display panel of the present application. FIG. 3 is a schematic film layer view of the display panel of the present application. FIG. 4 is a film layer diagram of a first gate layer in the display panel of the present application. FIG. 5 is a film layer diagram of a first active layer in the display panel of the present application. FIG. 6 is a laminated film layer diagram of the first gate layer and the first active layer in the display panel of the present application. FIG. 7 is a film layer diagram of a second gate layer in the display panel of the present application. FIG. 8 is a laminated film layer diagram of the first gate layer and the second gate layer in the display panel of the present application. FIG. 9 is a film layer diagram of a second active layer in the display panel of the