Wiring structure of pixel driving circuit, display panel, and display device

Patent metadata

Field	Value
Publication number	US-12550564-B2
Application number	US-202418734140-A
Country	US
Kind code	B2
Filing date	Jun 5, 2024
Priority date	Apr 4, 2018
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Provided are a wiring structure of a pixel driving circuit, a display panel, and a display device. The wire layout includes: a first switching element, a second switching element and a driving transistor. A source electrode of the driving transistor is connected to a power signal line. The power signal line includes a first power signal line that is in a same direction as a data signal line, and the data signal line is arranged at a position of the first power signal line away from a gate electrode of the driving transistor.

First claim

What is claimed is:

1 . A wire layout of a pixel driving circuit, comprising:
a first switching element, wherein a control terminal of the first switching element is connected to a scan signal line, a first terminal of the first switching element is connected to a data signal line, and a second terminal of the first switching element is connected to a first node; a second switching element, wherein a first terminal of the second switching element is connected to a second node, and a second terminal of the second switching element is connected to a third node; and a driving transistor, wherein a gate electrode of the driving transistor is connected to the second node, a source electrode of the driving transistor is connected to a power signal line, a drain electrode of the driving transistor is connected to the third node, and the first switching element is connected to an electrode of a storage capacitor; wherein the power signal line comprises a first power signal line that is in a same direction as the data signal line, and the data signal line is arranged at a position of the first power signal line away from the gate electrode of the driving transistor; wherein the pixel driving circuit further comprises the storage capacitor, the electrode of the storage capacitor connected to the first switching element is a first plate of the storage capacitor, the first node is connected to the first plate of the storage capacitor through a first wire, and the second node is to a second plate of the storage capacitor through a second wire, wherein the scan signal line does not overlap with the first wire and the second wire.

2 . The wire layout of the pixel driving circuit according to claim 1 , wherein the data signal line extends along a second direction, the first power signal line comprises a first portion, a second portion and a third portion which extend along a direction same as the second direction;
wherein an extending direction of a portion between the first portion and the second portion forms an angle with the second direction, and an extending direction of a portion between the second portion and the third portion forms an angle with the second direction.

3 . The wire layout of the pixel driving circuit according to claim 2 , wherein a distance between the data signal line and a side of the second portion of the first power signal line away from the data signal line is greater than a distance between the data signal line and a side of the first portion of the first power signal line away from the data signal line.

4 . The wire layout of the pixel driving circuit according to claim 1 , wherein an active layer of the second switching element and an active layer of the driving transistor are formed integrally, and the second switching element and the driving transistor are arranged adjacently.

5 . A display panel, comprising the wire layout of the pixel driving circuit according to claim 1 .

6 . A display device, comprising the display panel of claim 5 .

7 . A wire layout of a pixel driving circuit, comprising:
a first switching element, wherein a control terminal of the first switching element is connected to a scan signal line, a first terminal of the first switching element is connected to a data signal line, and a second terminal of the first switching element is connected to a first node; a second switching element, wherein a first terminal of the second switching element is connected to a second node, and a second terminal of the second switching element is connected to a third node; and a driving transistor, wherein a gate electrode of the driving transistor is connected to the second node, a source electrode of the driving transistor is connected to a power signal line, a drain electrode of the driving transistor is connected to the third node, and the first switching element is connected to an electrode of a storage capacitor; wherein the power signal line comprises a first power signal line that is in a same direction as the data signal line, and the data signal line is arranged at a position of the first power signal line away from the gate electrode of the driving transistor, wherein the pixel driving circuit further comprises a fourth switching element and an eighth switching element, orthographic projections of the fourth switching element and the eighth switching element on a base substrate are arranged at a same side of an orthographic projection of the driving transistor on the base substrate, and an active layer of the fourth switching element and an active layer of the eighth switching element are formed integrally.

8 . The wire layout of the pixel driving circuit according to claim 7 , wherein the fourth switching element is configured to write an initialization signal to the second node, and the eighth switching element is configured to write the initialization signal to an anode of a light emitting device connected to the pixel driving circuit.

9 . The wire layout of the pixel driving circuit according to claim 7 , wherein the pixel driving circuit further comprises a fifth switching element, and orthographic projections of the fifth switching element and the first switching element on the base substrate are arranged at a same side of the orthographic projection of the driving transistor on the base substrate;
wherein the control terminal of the first switching element and a control terminal of the fifth switching element are input with different signals, and the fifth switching element is configured to write an initialization signal to the first node.

10 . The wire layout of the pixel driving circuit according to claim 9 , wherein the pixel driving circuit further comprises a seventh switching element;
wherein a control terminal of the seventh switching element and a control terminal of the second switching element are input with different signals, and the control terminal of the second switching element and the control terminal of the seventh switching element are made of a same metal layer.

11 . The wire layout of the pixel driving circuit according to claim 9 , wherein the pixel driving circuit further comprises a first capacitor, and an orthographic projection of the first capacitor on the base substrate does not overlap with an orthographic projection of the storage capacitor on the base substrate.

12 . The wire layout of the pixel driving circuit according to claim 11 , wherein the power signal line further comprises a comprises a second power signal line that is in a same direction as the scan signal line;
wherein a first plate of the first capacitor is coupled with the second power signal line, and a signal of a second plate of the first capacitor is related to a signal provided by the data signal line.

13 . The wire layout of the pixel driving circuit according to claim 12 , wherein the first capacitor is adjacent to the storage capacitor.

14 . The wire layout of the pixel driving circuit according to claim 11 , wherein the pixel driving circuit further comprises a sixth switching element, and a control terminal of the sixth switching element is connected to a light emitting control signal line;
wherein orthographic projections of the first capacitor and the storage capacitor on the base substrate are arranged between orthographic projections of the first switching element and the sixth switching element on the base substrate.

15 . The wire layout of the pixel driving circuit according to claim 11 , wherein orthographic projections of the first capacitor and the storage capacitor on the base substrate are arranged between orthographic projections of

Assignees

• Boe Technology Group Co Ltd

Inventors

• Chen Yipeng
• Liu Libin
• Li Yunfei

Classifications

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10K59/1216

  the pixel elements being capacitors · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title