Display panel and display device

Patent metadata

Field	Value
Publication number	US-12389770-B2
Application number	US-202117927051-A
Country	US
Kind code	B2
Filing date	Oct 28, 2021
Priority date	Oct 28, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A display panel and a display device are provided, the display panel has a display region, a dummy pixel region and a circuit region, the display region includes a planarization layer and an encapsulation layer. The circuit region includes a plurality of wires and a frame sealant. The frame sealant overlaps with at least a part of the wires, the encapsulation layer overlaps with at least a part of the frame sealant. The planarization layer includes at least one groove in the circuit region, and overlapping with at least a part of the wires. A first side and a second side of the display region include a binding region, and at least one first chip-on-film in the first binding region on the first side and at least one second chip-on-film in the second binding region on the second side are centrosymmetric with respect to a center of the display region.

First claim

What is claimed is:

1. A display panel, having a display region, and a dummy pixel region and a circuit region sequentially arranged on at least one side of the display region and in a direction away from the display region, and comprising a base substrate,
wherein the display region has a plurality of display sub-pixels arranged in a plurality of rows and columns, and comprises a pixel driving circuit layer on the base substrate, a planarization layer on a side of the pixel driving circuit layer away from the base substrate, a light-emitting device layer on a side of the planarization layer away from the base substrate, and an encapsulation layer on a side of the light-emitting device layer away from the base substrate, and each of the plurality of the display sub-pixels comprises a pixel driving circuit in the pixel driving circuit layer and a light-emitting device in the light-emitting device layer;
the dummy pixel region comprises a plurality of dummy sub-pixels on the base substrate;
the circuit region comprises a plurality of wires on the base substrate and a frame sealant on a side of the plurality of wires away from the base substrate;
in a direction perpendicular to the base substrate, the frame sealant overlaps with at least a part of the plurality of wires, the encapsulation layer further extends to the circuit region, and overlaps with at least a part of the frame sealant, the planarization layer further extends to the circuit region, and comprises at least one groove in the circuit region, and the at least one groove overlaps with at least a part of the plurality of wires; and
the at least one side comprises a first side and a second side on opposite sides of the display region, the first side and the second side further comprise a binding region on a side of the circuit region away from the display region, the binding region comprises a first binding region on the first side and a second binding region on the second side, the first binding region comprises at least one first chip-on-film, the second binding region comprises at least one second chip-on-film, and the at least one first chip-on-film and the at least one second chip-on-film are centrosymmetric with respect to a center of the display region.

2. The display panel according to claim 1 , wherein the first chip-on-film is configured to provide electrical signals to display sub-pixels in odd-numbered columns among the plurality of rows and columns of display sub-pixels, and the second chip-on-film is configured to provide electrical signals to display sub-pixels in even-numbered columns among the plurality of rows and columns of display sub-pixels; or
the first chip-on-film is configured to provide electrical signals to display sub-pixels in even-numbered columns among the plurality of rows and columns of display sub-pixels, and the second chip-on-film is configured to provide electrical signals to display sub-pixels in odd-numbered columns among the plurality of rows and columns of display sub-pixels.

3. The display panel according to claim 2 , wherein the display region further comprises a passivation layer on a side of the pixel driving circuit layer away from the base substrate, the passivation layer further extends to the circuit region and is on a side of the plurality of wires away from the base substrate, and
the frame sealant is on a side of the passivation layer away from the base substrate and is in direct contact with the passivation layer.

4. The display panel according to claim 1 , wherein the circuit region further comprises an electrostatic discharge circuit on the first side and the second side, respectively, the plurality of wires comprise a sensing line extending in a first direction, and the sensing line is configured to provide a sensing signal to the pixel driving circuit; and
the electrostatic discharge circuit comprises a plurality of electrostatic discharge portions, and in a second direction perpendicular to the first direction, the plurality of electrostatic discharge portions are symmetrically distributed with respect to the sensing line.

5. The display panel according to claim 4 , wherein the plurality of wires further comprise a plurality of data lines extending along the first direction, the plurality of data lines are configured to provide a data signal to the pixel driving circuit, and
the plurality of data lines are respectively on a side of the plurality of electrostatic discharge portions away from the sensing line.

6. The display panel according to claim 1 , wherein the display region further comprises a passivation layer on a side of the pixel driving circuit layer away from the base substrate, the passivation layer further extends to the circuit region and is on a side of the plurality of wires away from the base substrate, and
the frame sealant is on a side of the passivation layer away from the base substrate and is in direct contact with the passivation layer.

7. The display panel according to claim 1 , wherein in a direction away from the display region, the circuit region comprises a power bus region, a fan-out signal line region and a transfer signal line region on the first side and the second side, respectively, and
the frame sealant comprises a first part in the fan-out signal line region and a second part in the transfer signal line region.

8. The display panel according to claim 7 , wherein the power bus region comprises a first power bus, and a first end of the first power bus is electrically connected to first power lines of the plurality of display sub-pixels.

9. The display panel according to claim 8 , wherein a second end of the first power bus opposite to the first end is connected to the at least one first chip-on-film or the at least one second chip-on-film through a plurality of power lead lines, respectively.

10. The display panel according to claim 9 , wherein the fan-out signal line region comprises a plurality of fan-out signal lines, and
in the fan-out signal line region, the plurality of fan-out signal lines and the plurality of power lead lines are alternately arranged.

11. The display panel according to claim 7 , wherein the at least one groove comprises a first groove on the first side and the second side, respectively, and
in the direction perpendicular to the base substrate, at least a part of the first groove is in the power bus region.

12. The display panel according to claim 11 , wherein the at least one side further comprises a third side and a fourth side on opposite sides of the display region, the third side and the fourth side respectively comprise a first gate scanning driving circuit and a second gate scanning driving circuit, and the first scanning driving circuit is on a side of the second scanning driving circuit close to the display region;
one of the first gate scanning driving circuit and the second gate scanning driving circuit is a row scanning driving circuit and is configured to provide a row scanning signal to the plurality of display sub-pixels, and another one of the first gate scanning driving circuit and the second gate scanning driving circuit is a light-emitting scanning driving circuit and is configured to provide a light-emitting control signal to the plurality of display sub-pixels; and
the at least one groove further comprises a second groove between the first gate scanning driving circuit and the second gate scanning driving circuit.

13. The display panel according to claim 12 , wherein the encapsulation layer comprises an inorganic encapsulation layer, and the inorganic encapsulation layer extends to a side of the frame sealant close to the base substrate;
the circuit region

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhang Xing
• Xu Pan
• Zhang Dacheng
• Han Ying
• Wang Guoying
• Chen Yi

Classifications

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H10K59/80 Primary

  Constructional details · CPC title

• H10K59/129

  Chiplets · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title