# US 12,763,025 B1 · Display panel and display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,763,025 B1
- Document ID: US12763025B1
- Status: Granted
- Kind: B1
- Application number: 19/325,746
- Filed: 2025-09-11
- Granted: 2026-10-13
- Earliest claimed: 2025-06-30
- Assignees: Tianma Advanced Display Technology Institute (Xiamen) Co., Ltd.
- Applicants: Tianma Advanced Display Technology Institute (Xiamen) Co., Ltd.
- Inventors: Yuqi Hu; Jiajie Li
- Web page: https://patentgrep.com/patent/US12763025B1

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- H10H 29/32: characterised by the geometry or arrangement of elements within a subpixel, e.g. arrangement of the transistor within its RGB subpixel
- H10H 29/49: Interconnections, e.g. wiring lines or terminals (connection of the pixel electrodes to the driving transistors H10H29/39)
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- H10K 59/1315: {comprising structures specially adapted for lowering the resistance}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present disclosure provides a display panel and a display device, which include a light-emitting element and a pixel circuit connected to the light-emitting element. The pixel circuit includes a driving transistor and a first light-emitting control transistor, where the first electrode of the driving transistor is coupled to the first power supply terminal, and the second electrode of the driving transistor is connected to the first electrode of the first light-emitting control transistor through a first connection part. The second electrode of the first light-emitting control transistor is coupled to the first electrode of the light-emitting element, and the second electrode of the light-emitting element is coupled to the second power supply terminal. The resistance of the first connection parts corresponding to at least two different pixel circuits is different.

## Claims

### Claim 1

A display panel, comprising a light-emitting element and a pixel circuit connected to the light-emitting element, wherein:
the pixel circuit includes a driving transistor and a first light-emitting control transistor, wherein a first electrode of the driving transistor is coupled to a first power supply terminal, and a second electrode of the driving transistor is connected to a first electrode of the first light-emitting control transistor through a first connection part, a second electrode of the first light-emitting control transistor is coupled to a first electrode of the light-emitting element, and a second electrode of the light-emitting element is coupled to a second power supply terminal; and
resistance of first connection parts corresponding to at least two different pixel circuits is different.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein:
the light-emitting element includes a first light-emitting element and a second light-emitting element, and light-emitting colors of the first light-emitting element and the second light-emitting element are different;
the pixel circuit includes a first pixel circuit and a second pixel circuit, the first pixel circuit is electrically connected to the first light-emitting element, and the second pixel circuit is electrically connected to the second light-emitting element; and
a turn-on voltage of the first light-emitting element is lower than a turn-on voltage of the second light-emitting element, and a resistance of a first connection part in the first pixel circuit is higher than a resistance of a first connection part in the second pixel circuit.

### Claim 3 (depends on 2)

The display panel according to claim 2, wherein materials of first connection parts corresponding to the first pixel circuit and the second pixel circuit are the same, and a width of the first connection part of the first pixel circuit is smaller than a width of the first connection part of the second pixel circuit, and a width direction of the first connection part is perpendicular to an extension direction of the first connection part.

### Claim 4 (depends on 3)

The display panel according to claim 3, further comprising a semiconductor layer, wherein the first connection parts corresponding to the first pixel circuit and the second pixel circuit are both located in the semiconductor layer.

### Claim 5 (depends on 2)

The display panel according to claim 2, wherein first connection parts corresponding to the first pixel circuit and the second pixel circuit are made of different materials, and a sheet resistance of the first connection part in the first pixel circuit is greater than a sheet resistance of the first connection part in the second pixel circuit.

### Claim 6 (depends on 5)

The display panel according to claim 5, wherein the sheet resistance of the first connection part in the first pixel circuit is R1, the sheet resistance of the first connection part in the second pixel circuit is R2, R1=K*R2, wherein K≥105.

### Claim 7 (depends on 6)

The display panel according to claim 6, wherein R2≤1 Ω/sq.

### Claim 8 (depends on 5)

The display panel according to claim 5, wherein the first connection part of the first pixel circuit includes a semiconductor material, and the first connection part of the second pixel circuit includes a metal material.

### Claim 9 (depends on 8)

The display panel according to claim 8, further comprising a semiconductor layer and at least one metal layer, wherein the first connection part of the first pixel circuit is disposed in the semiconductor layer, and the first connection part of the second pixel circuit is disposed in the at least one the metal layer.

### Claim 10 (depends on 2)

The display panel according to claim 2, wherein:
the first connection part includes a first sub-portion and a second sub-portion connected to each other, the first sub-portion extends along a first direction, the second sub-portion extends along a second direction, and the first direction and the second direction intersect;
the first sub-portion is located on one side of a gate of the driving transistor along the second direction, and the second sub-portion is located on one side of the gate of the driving transistor along the first direction;
the first connection part corresponding to the second pixel circuit includes a metal material, and in the first connection part corresponding to the second pixel circuit, the first sub-portion is connected to a semiconductor layer of the driving transistor through a first connection hole, and the second sub-portion is connected to a semiconductor layer of the first light-emitting control transistor through a second connection hole; and
the first connection part corresponding to the first pixel circuit includes a semiconductor material, in the first connection part corresponding to the first pixel circuit, the first sub-portion and the second sub-portion are arranged in a same layer as the semiconductor layer of the driving transistor and the first light-emitting control transistor.

### Claim 11 (depends on 10)

The display panel according to claim 10, wherein a length of a second sub-portion of the second pixel circuit is greater than a length of a second sub-portion of the first pixel circuit.

### Claim 12 (depends on 10)

The display panel according to claim 10, further comprising a first scan line and a second scan line extending along the first direction, the first scan line configured to provide a first scan signal to the pixel circuit, and the second scan line configured to provide a second scan signal to the pixel circuit, wherein:
in an area corresponding to the pixel circuit, along the second direction, the second scanning line is located between the first scanning line and the gate of the driving transistor; and
in an area corresponding to the first pixel circuit, along the second direction, a distance between the second scan line and the gate of the driving transistor is d1, and in an area corresponding to the second pixel circuit, along the second direction, a distance between the second scan line and the gate of the driving transistor is d2, wherein d1<d2.

### Claim 13 (depends on 12)

The display panel according to claim 12, further comprising an extension portion electrically connected to the second scan line, the extension portion being located between the first scan line and the second scan line, wherein:
the pixel circuit further includes a threshold compensation transistor, a first electrode of the threshold compensation transistor is electrically connected to the first connection part, a second electrode of the threshold compensation transistor is connected to the gate of the driving transistor, and a control terminal of the threshold compensation transistor is electrically connected to the second scan line; and
the threshold compensation transistor includes a first sub-transistor and a second sub-transistor connected in series, a gate of the first sub-transistor overlaps with the second scan line, and a gate of the second sub-transistor overlaps with the extension portion.

### Claim 14 (depends on 2)

The display panel according to claim 2, wherein:
the light-emitting element further includes a third light-emitting element, and a light-emitting color of the third light-emitting element is different from the light-emitting colors of the first light-emitting element and the second light-emitting element;
the pixel circuit further includes a third pixel circuit, and the third light-emitting element is electrically connected to the third pixel circuit;
the turn-on voltage of the second light-emitting element is less than or equal to a turn-on voltage of the third light-emitting element; and
the resistance of the first connection part in the second pixel circuit is greater than or equal to a resistance of a first connection part in the third pixel circuit.

### Claim 15 (depends on 14)

The display panel according to claim 14, wherein the first light-emitting element is a red light-emitting element, the second light-emitting element is one of a green light-emitting element and a blue light-emitting element, and the third light-emitting element is another one of the green light-emitting element and the blue light-emitting element.

### Claim 16 (depends on 1)

The display panel according to claim 1, wherein:
the light-emitting element includes a first light-emitting element, a second light-emitting element and a third light-emitting element, the first light-emitting element is a red light-emitting element, the second light-emitting element is one of a green light-emitting element and a blue light-emitting element, and the third light-emitting element is another one of the green light-emitting element and the blue light-emitting element;
the pixel circuit includes a first pixel circuit, a second pixel circuit and a third pixel circuit, the first light-emitting element is electrically connected to the first pixel circuit, the second light-emitting element is electrically connected to the second pixel circuit, and the third light-emitting element is electrically connected to the third pixel circuit;
a turn-on voltage of the first light-emitting element is less than a turn-on voltage of the second light-emitting element, and the turn-on voltage of the second light-emitting element is less than or equal to a turn-on voltage of the third light-emitting element; and
a first connection part of the first pixel circuit includes a semiconductor material, and first connection parts of the second pixel circuit and the third pixel circuit include a metal material.

### Claim 17 (depends on 2)

The display panel according to claim 2, wherein in the first pixel circuit, a channel width-to-length ratio of the driving transistor is A1, and a channel width-to-length ratio of the first light-emitting control transistor is K1, and in the second pixel circuit, a channel width-to-length ratio of the driving transistor is A2, and a channel width-to-length ratio of the first light-emitting control transistor is K2, wherein A1/K1>A2/K2.

### Claim 18 (depends on 1)

The display panel according to claim 1, wherein:
the pixel circuit further includes a second light-emitting control transistor, and the second light-emitting control transistor is connected between the first electrode of the driving transistor and the first power supply terminal; and
in an area where the pixel circuit is located, the first light-emitting control transistor and the second light-emitting control transistor are located on a same side of a gate of the driving transistor along a second direction.

### Claim 19 (depends on 18)

The display panel according to claim 18, wherein a width-to-length ratio of the second light-emitting control transistor is greater than a width-to-length ratio of the first light-emitting control transistor.

### Claim 20

A display device, comprising a display panel, and the display panel including a light-emitting element and a pixel circuit connected to the light-emitting element, wherein:
the pixel circuit includes a driving transistor and a first light-emitting control transistor, wherein a first electrode of the driving transistor is coupled to a first power supply terminal, and a second electrode of the driving transistor is connected to a first electrode of the first light-emitting control transistor through a first connection part, a second electrode of the first light-emitting control transistor is coupled to a first electrode of the light-emitting element, and a second electrode of the light-emitting element is coupled to a second power supply terminal; and
resistance of first connection parts corresponding to at least two different pixel circuits is different.