Display panel and display device

Patent metadata

Field	Value
Publication number	US-12414441-B2
Application number	US-202117788555-A
Country	US
Kind code	B2
Filing date	Apr 30, 2021
Priority date	Apr 30, 2021
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A display panel and a display device are provided. The display panel includes: a base substrate having a display region and a peripheral region, the peripheral region being located on at least one side of the display region; a pixel unit located on the base substrate and including a pixel circuit and a light-emitting element, the pixel circuit being configured to drive the light-emitting element, the pixel circuit including a driving transistor and a data writing transistor, and the driving transistor being connected to the data writing transistor; a data line connected to the data writing transistor and configured to provide a data signal to the pixel circuit; and a compensation structure connected to the data line and located in the peripheral region, the compensation structure including at least one of a resistance compensation unit or a capacitance compensation unit.

First claim

What is claimed is:

1. A display panel, comprising:
a base substrate, having a display region and a peripheral region, wherein the peripheral region is located on at least one side of the display region;
a pixel unit, located on the base substrate, and comprising a pixel circuit and a light-emitting element, wherein the pixel circuit is configured to drive the light-emitting element, the pixel circuit comprises a driving transistor and a data writing transistor, and the driving transistor is connected to the data writing transistor;
a data line, connected to the data writing transistor, and configured to provide a data signal to the pixel circuit; and
a compensation structure, connected to the data line, and located in the peripheral region, wherein the compensation structure comprises at least one of a resistance compensation unit or a capacitance compensation unit,
wherein the compensation structure comprises a capacitance compensation unit, the capacitance compensation unit comprises a first compensation portion, a first electrode-plate, a second compensation portion, and a second electrode-plate, the first compensation portion is connected to the data line, the first compensation portion overlaps with the first electrode-plate to form a first compensation capacitor, and the second compensation portion overlaps with the first electrode-plate to form a second compensation capacitor, the second compensation portion overlaps with the second electrode-plate to form a third compensation capacitor, and the first compensation capacitor, the second compensation capacitor, and the third compensation capacitor are connected in parallel.

2. The display panel according to claim 1 , wherein the capacitance compensation unit comprises a plurality of compensation capacitors, and the plurality of compensation capacitors are connected in parallel.

3. The display panel according to claim 1 , wherein the compensation structure comprises a resistance compensation unit, the resistance compensation unit comprises the first compensation portion connected to the data line and the second compensation portion connected to the first compensation portion, the first compensation portion and the second compensation portion are located in different layers, and an orthographic projection of the first compensation portion on the base substrate at least partially overlaps with an orthographic projection of the second compensation portion on the base substrate.

4. The display panel according to claim 1 , wherein the first compensation portion is located in a first conductive layer, the first electrode-plate is located in a second conductive layer, the second compensation portion is located in a third conductive layer, and the second electrode-plate is located in a fourth conductive layer,
the first conductive layer is located on a first insulating layer, a second insulating layer is disposed between the first conductive layer and the second conductive layer, a third insulating layer is disposed between the second conductive layer and the third conductive layer, and a planarization layer is disposed between the third conductive layer and the fourth conductive layer.

5. The display panel according to claim 1 , wherein the first compensation portion and the second compensation portion form the resistance compensation unit.

6. The display panel according to claim 1 , wherein an orthographic projection of the first compensation portion on the base substrate at least partially overlaps with an orthographic projection of the second compensation portion on the base substrate.

7. The display panel according to claim 1 , wherein a width of the first compensation portion in a first direction is same as a width of the second compensation portion in the first direction,
the first direction intersects with an extending direction of the first compensation portion and intersects with an extending direction of the second compensation portion,
the first compensation portion and the second compensation portion are connected through a via hole.

8. The display panel according to claim 1 , further comprising a first connection structure, wherein the data line is connected to the first compensation portion through the first connection structure.

9. The display panel according to claim 4 , wherein the third conductive layer further comprises a signal line, the signal line extends in a first direction, and an orthographic projection of the signal line on the base substrate overlaps with an orthographic projection of the first compensation portion on the base substrate.

10. The display panel according to claim 1 , wherein the first electrode-plate and the second electrode-plate are both connected to a constant voltage terminal, and the constant voltage terminal includes at least one of a first power terminal and a second power terminal.

11. The display panel according to claim 1 , further comprising a second connection structure, wherein the data line is connected to a plurality of capacitance compensation units through the second connection structure, and capacitors of the plurality of capacitance compensation units connected to the data line are connected in parallel.

12. The display panel according to claim 1 , wherein first electrode-plates of different capacitance compensation units are of an integrated structure, or second electrode-plates of different capacitance compensation units are of an integrated structure.

13. The display panel according to claim 12 , wherein a plurality of capacitance compensation units are arranged in a first direction; at one side of a center line of the display panel, a size of the first electrode-plate in a second direction gradually changes, and a size of the second electrode-plate in the second direction gradually changes; the first direction intersects with the second direction, and the center line is parallel with the second direction.

14. A display panel, comprising:
a base substrate, having a display region and a peripheral region, wherein the peripheral region is located on at least one side of the display region;
a pixel unit, located on the base substrate, and comprising a pixel circuit and a light-emitting element, wherein the pixel circuit is configured to drive the light-emitting element, the pixel circuit comprises a driving transistor and a data writing transistor, and the driving transistor is connected to the data writing transistor;
a data line, connected to the data writing transistor, and configured to provide a data signal to the pixel circuit; and
a compensation structure, connected to the data line, and located in the peripheral region, wherein the compensation structure comprises at least one of a resistance compensation unit or a capacitance compensation unit,
wherein the data line comprises a first-type data line and a second-type data line, the compensation structure comprises a first compensation structure and a second compensation structure, and a compensation amount of the first compensation structure connected to the first-type data line is greater than a compensation amount of the second compensation structure connected to the second-type data line.

15. The display panel according to claim 14 , wherein a plurality of first-type data lines and a plurality of first compensation structures are provided, the plurality of first compensation structures are arranged in sequence, and among the plurality of first compensation structures, the closer the first compensation structure is to an edge of the display panel, the smaller the compensation amount of the first compensation structure is.

16. The

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Huang Yao
• Wang Binyan
• Cheng Yudiao

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• G09G3/36

  using liquid crystals · CPC title

• H10K59/1216 Primary

  the pixel elements being capacitors · CPC title