Display panel and display device

Patent metadata

Field	Value
Publication number	US-12374290-B2
Application number	US-202218580006-A
Country	US
Kind code	B2
Filing date	Nov 1, 2022
Priority date	Nov 1, 2022
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A display panel and a display device are provided, the first signal line extends from the display region to the electrostatic discharge region in a first direction, and provides a first display signal to the sub-pixels; the electrostatic discharge units are arranged in the first direction, each electrostatic discharge unit includes a sub electrostatic discharge unit, each sub electrostatic discharge unit includes an electrostatic discharge circuit and a first conductor, the electrostatic discharge circuit is connected to the first signal line and the first conductor, and charges on the first signal line move towards the first conductor; the electrostatic discharge units include two adjacent electrostatic discharge units in a second direction perpendicular to the first direction, orthographic projections of the two adjacent electrostatic discharge units on a plane parallel to the first direction are not overlapped, and on a plane parallel to the second direction are overlapped.

First claim

The invention claimed is:

1. A display panel, comprising:
a display region, comprising sub-pixels;
a non-display region, surrounding at least part of the display region, and comprising an electrostatic discharge region;
a first signal line, extending from the display region to the electrostatic discharge region in a first direction as a whole, and configured to provide a first display signal to the sub-pixels; and
a plurality of electrostatic discharge units, arranged in the first direction, wherein each of the plurality of electrostatic discharge units comprises at least one sub electrostatic discharge unit, each of the at least one sub electrostatic discharge unit comprises an electrostatic discharge circuit and a first conductor, the electrostatic discharge circuit is electrically connected to the first signal line and the first conductor, and is configured to allow charges on the first signal line to move towards the first conductor;
the plurality of electrostatic discharge units comprise two adjacent electrostatic discharge units in a second direction, the second direction is perpendicular to the first direction, orthographic projections of the two adjacent electrostatic discharge units on a plane parallel to the first direction are not overlapped with each other and orthographic projections of the two adjacent electrostatic discharge units on a plane parallel to the second direction are at least partially overlapped with each other, or, the orthographic projections of the two adjacent electrostatic discharge units on the plane parallel to the first direction are not overlapped with each other and a distance between the two adjacent electrostatic discharge units in the second direction is less than 1 μm,
wherein the display panel comprises a plurality of first signal lines, and the plurality of sub static discharge units of the plurality of electrostatic discharge units are electrically connected to one first signal line of the plurality of first signal lines, respectively;
at least one of the plurality of first signal lines comprises a recess in the electrostatic discharge region, wherein the recess constitutes a groove depressed towards one side in the second direction, and at least part of a sub electrostatic discharge unit adjacent to the groove is located in the groove,
at least one electrostatic discharge unit of the plurality of electrostatic discharge units comprises two adjacent sub electrostatic discharge units in the second direction, and two adjacent first signal lines both comprise a recess in the electrostatic discharge region, recesses of the two adjacent first signal lines constitute grooves depressed towards a same side in the second direction, and the two adjacent sub electrostatic discharge units are respectively at least partially located in the grooves formed by the recesses of the two adjacent first signal lines,
wherein the first signal line connected to the at least one sub electrostatic discharge unit comprises:
a first recess, constituting a first groove depressed towards a first side in the second direction;
a second recess, constituting a second groove depressed towards a second side opposite to the first side in the second direction, and arranged in the second direction with the first recess, wherein the two adjacent electrostatic discharge units are respectively a first electrostatic discharge unit and a second electrostatic discharge unit, an orthographic projection of the first electrostatic discharge unit parallel to the first direction is within an orthographic projection of the first groove parallel to the first direction, and an orthographic projection of the second electrostatic discharge unit parallel to the first direction is within an orthographic projection of the second groove parallel to the first direction.

2. The display panel according to claim 1 , wherein in the plurality of sub electrostatic discharge units of the plurality of electrostatic discharge units, orthographic projections of at least two sub electrostatic discharge units on the plane parallel to the first direction are not overlapped with each other, and the orthographic projections of the at least two sub electrostatic discharge units on the plane parallel to the second direction are at least partially overlapped with each other.

3. The display panel according to claim 1 , wherein a size of the electrostatic discharge circuit in the second direction is smaller than a size of the electrostatic discharge circuit in the first direction.

4. The display panel according to claim 1 , wherein the plurality of electrostatic discharge units constitute a plurality of electrostatic discharge unit groups spaced apart from each other in the second direction, each of the plurality of electrostatic discharge unit groups comprises M sub electrostatic discharge unit groups, each of the M sub electrostatic discharge unit groups comprises N electrostatic discharge units, and each of N the electrostatic discharge units comprises Q sub electrostatic discharge units, M and Q are positive integers greater than or equal to 1, and N is a positive integer greater than or equal to 2;
at least part electrostatic discharge unit groups of the plurality of electrostatic discharge unit groups are in a periodic arrangement in the second direction, and one electrostatic discharge unit group is a repeating unit in the periodic arrangement.

5. The display panel according to claim 4 , wherein a count of sub electrostatic discharge units comprised in one electrostatic discharge unit group is M*N*Q;
in the case where M is equal to 1, N is equal to 2, and Q is equal to 3, a width of one electrostatic discharge unit group in the second direction is less than or equal to 129.5 μm; or,
in the case where M is equal to 2, N is equal to 3, and Q is equal to 3, a width of one electrostatic discharge unit group in the second direction is less than or equal to 294 μm.

6. The display panel according to claim 5 , wherein a resolution of the display panel is X*Y, X represents a count of rows of a pixel array in the display region, Y represents a count of columns of the pixel array in the display region, X is greater than or equal to 960, and Y is greater than or equal to 1440.

7. The display panel according to claim 4 , wherein the M sub electrostatic discharge unit groups comprise a first sub electrostatic discharge unit group and a second sub electrostatic discharge unit group, the first sub electrostatic discharge unit group and the second sub electrostatic discharge unit group are symmetrical or asymmetrical relative to a symmetry axis extending in the first direction.

8. The display panel according to claim 1 , wherein the first display signal is a data signal, and the first signal line transmits the data signal; each of the sub-pixels comprises a pixel circuit, and the pixel circuit comprises:
a light-emitting device, a driving transistor and a data writing transistor, wherein the data writing transistor is configured to transmit the data signal to the driving transistor under control of a first scanning signal;
the driving transistor is configured to control a magnitude of a driving current flowing through the light-emitting device according to the data signal, and the light-emitting device is configured to receive the driving current and be driven by the driving current to emit light.

9. The display panel according to claim 1 , wherein the non-display region comprises a lead region, a driving circuit is provided in the lead region, and the driving circuit is configured to provide the first display signal to the first signal line;
the electrostatic discharge region is between the lead region and the display region, and all the plurality of sub electrostatic discharg

Assignees

• Hefei Boe Joint Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Wu Liu
• Yuan Zhidong
• Li Yongqian
• Sun Li

Classifications

• G09G2330/06

  Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation · CPC title

• G09G2330/04

  Display protection · CPC title

• G09G2310/08

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

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G02F1/136204

  Arrangements to prevent high voltage or static electricity failures · CPC title