# US 12,016,207 B2 · Array substrate, display panel and display device

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- Number: US 12,016,207 B2
- Document ID: US12016207B2
- Status: Granted
- Kind: B2
- Application number: 17/556,721
- Filed: 2021-12-20
- Published: 2022-09-01
- Granted: 2024-06-18
- Earliest claimed: 2021-02-26
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: BOE Technology Group Co., Ltd.
- Inventors: Zhichong Wang
- Web page: https://patentgrep.com/patent/US12016207B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- H10K 59/1213: {the pixel elements being TFTs}
- H10D 86/441: {Interconnections, e.g. scanning lines}
- H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/1216: {the pixel elements being capacitors}
- H10K 59/1315: {comprising structures specially adapted for lowering the resistance}
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0465: Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- 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 2310/0248: Precharge or discharge of column electrodes before or after applying exact column voltages
- 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)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

Provided are an array substrate, a display panel and a display device. The array substrate includes multiple sub-pixel units arranged in an array. Each sub-pixel unit includes a pixel circuit structure and a light-emitting element; the pixel circuit structure includes a driving transistor, a first reset transistor and a second reset transistor; each of the driving transistor, the first reset transistor and the second reset transistor includes an active structure, a first insulating structure on the active structure, and a first metal layer structure on the first insulating structure; the active structure of the first reset transistor of an i-th row of sub-pixel unit is electrically coupled to an anode of the light-emitting element of the i-th row of sub-pixel unit, and is electrically coupled to the active structure of the second reset transistor of an (i+1)-th row of sub-pixel unit, i being an integer greater than 0.

## Claims

### Claim 1

An array substrate, comprising: a plurality of sub-pixel units arranged in an array on a base substrate, wherein:
each of the sub-pixel units comprises a pixel circuit structure and a light-emitting element;
the pixel circuit structure comprises a driving transistor, a first reset transistor and a second reset transistor;
each of the driving transistor, the first reset transistor and the second reset transistor comprises an active structure, a first insulating structure on the active structure, and a first metal layer structure on the first insulating structure;
the active structure of the first reset transistor of an i-th row of sub-pixel unit is electrically coupled to an anode of the light-emitting element of the i-th row of sub-pixel unit, and is electrically coupled to the active structure of the second reset transistor of an (i+1)-th row of sub-pixel unit, i being an integer greater than 0; and
in each of the sub-pixel units, the first metal layer structure of the driving transistor is electrically coupled to the active structure of the second reset transistor.

### Claim 2 (depends on 1)

The array substrate according to claim 1, wherein each of the sub-pixel units further comprises a second insulating structure, a second metal layer structure, a first interlayer dielectric layer, and a third metal layer structure that are stacked on the first metal layer structure, and
in the sub-pixel unit, the first metal layer structure of the driving transistor is electrically coupled to a first end of the third metal layer structure of the sub-pixel unit, and a second end of the third metal layer structure is electrically coupled to the active structure of the second reset transistor.

### Claim 3 (depends on 2)

The array substrate according to claim 2, wherein an orthographic projection of the first end of the third metal layer structure onto the base substrate of the sub-pixel unit is at least partially overlapped with an orthographic projection of the first metal layer structure of the driving transistor onto the base substrate, and at an area where the orthographic projections are overlapped, a first via hole is arranged in the second insulating structure and the first interlayer dielectric layer structure; and
the first end of the third metal layer structure is electrically coupled to the first metal layer structure of the driving transistor through the first via hole.

### Claim 4 (depends on 3)

The array substrate according to claim 3, wherein an orthographic projection of the second end of the third metal layer structure onto the base substrate is at least partially overlapped with an orthographic projection of the active structure of the second reset transistor onto the base substrate, and at an area where the orthographic projections are overlapped, a second via hole is arranged in the first insulating structure, the second insulating structure, and the first interlayer dielectric layer structure; and
the second end of the third metal layer structure is electrically coupled to the active structure of the second reset transistor through the second via hole.

### Claim 5 (depends on 2)

The array substrate according to claim 2, wherein each of the sub-pixel units further comprises a second interlayer dielectric layer structure on the third metal layer structure and a fourth metal layer structure on the second interlayer dielectric layer structure;
a third via hole is arranged in the first interlayer dielectric layer structure and the second interlayer dielectric layer structure; and
the fourth metal layer structure is electrically coupled to the second metal layer structure through the third via hole.

### Claim 6 (depends on 1)

The array substrate according to claim 1, wherein in each of the sub-pixel units, one of the first metal layer structure of the sub-pixel unit comprises the first metal layer structure of the driving transistor;
each of the sub-pixel units further comprises a second insulating structure, a second metal layer structure, a first interlayer dielectric layer structure, a third metal layer structure, a second interlayer dielectric layer and a fourth metal layer structure that are stacked on the first metal layer structure;
an orthographic projection of the second metal layer structure onto the base substrate partially overlaps with an orthographic projection of the first metal layer structure onto the base substrate, and a first capacitor is formed between the second metal layer structure and the first metal layer structure at an area where the orthographic projections are overlapped;
an orthographic projection of the third metal layer structure onto the base substrate partially overlaps with the orthographic projection of the second metal layer structure onto the base substrate, and a second capacitor is formed between the third metal layer structure and the second metal layer structure at an area where the orthographic projections are overlapped; and
an orthographic projection of the fourth metal layer structure onto the base substrate partially overlaps with the orthographic projection of the third metal layer structure onto the base substrate, and a third capacitor is formed the fourth metal layer structure and the third metal layer structure at an area where the orthographic projections are overlapped.

### Claim 7 (depends on 6)

The array substrate according to claim 6, wherein the third metal layer structure serves as a reset signal line, and is configured to receive a reset signal; and
the fourth metal layer structure serves as a power supply line, and is configured to receive a power supply voltage.

### Claim 8 (depends on 1)

The array substrate according to claim 1, wherein each of the sub-pixel units further comprises a third insulating structure, a fifth metal layer structure, a third interlayer dielectric layer structure, a sixth metal layer structure, a fourth interlayer dielectric layer structure and a seventh metal layer structure that are stacked; and
in the sub-pixel unit, the first metal layer structure of the driving transistor is electrically coupled to a first end of the seventh metal layer structure of the sub-pixel unit, and a second end of the seventh metal layer structure is electrically coupled to an active structure of the reset transistor.

### Claim 9 (depends on 8)

The array substrate according to claim 8, wherein an orthographic projection of the first end of the seventh metal layer structure onto the base substrate of the sub-pixel unit at least partially overlaps with an orthographic projection of the first metal layer structure of the driving transistor onto the base substrate, and at an area where the orthographic projections are overlapped, a fourth via hole is arranged in the third insulating structure, the third interlayer dielectric layer structure and the fourth interlayer dielectric layer structure; and
the first end of the seventh metal layer structure is electrically coupled to the first metal layer structure of the driving transistor through the fourth via hole.

### Claim 10 (depends on 9)

The array substrate according to claim 9, wherein an orthographic projection of the second end of the seventh metal layer structure onto the base substrate at least partially overlaps with an orthographic projection of the active structure of the second reset transistor onto the base substrate, and at an area where the orthographic projections are overlapped, a fifth via hole is arranged in the third insulating structure, the third interlayer dielectric layer structure and the fourth interlayer dielectric layer structure; and
the second end of the seventh metal layer structure is electrically coupled to the active structure of the second reset transistor through the fifth via hole.

### Claim 11 (depends on 8)

The array substrate according to claim 8, wherein the third interlayer dielectric layer structure is provided with a sixth via hole; and
the sixth metal layer structure is electrically coupled to the fifth metal layer structure through the sixth via hole.

### Claim 12 (depends on 8)

The array substrate according to claim 8, wherein an orthographic projection of the fifth metal layer structure onto the base substrate partially overlaps with an orthographic projection of the first metal layer structure onto the base substrate, and at an area where the orthographic projections are overlapped, a fourth capacitor is formed between the fifth metal layer structure and the first metal layer structure; and
an orthographic projection of the seventh metal layer structure onto the base substrate partially overlaps with an orthographic projection of the sixth metal layer structure onto the base substrate, and at an area where the orthographic projections are overlapped, a fifth capacitor is formed between the seventh metal layer structure and the sixth metal layer structure.

### Claim 13 (depends on 8)

The array substrate according to claim 8, wherein the seventh metal layer structure serves as a reset signal line, and is configured to receive a reset signal; and
the sixth metal layer structure serves as a power supply line, and is configured to receive a power supply voltage.

### Claim 14 (depends on 1)

The array substrate according to claim 1, wherein both the first metal layer structure of the first reset transistor of the i-th row of sub-pixel unit, and the first metal layer structure of the second reset transistor of the (i+1)-th row of sub-pixel unit belong to the same first metal layer structure of the (i+1)-th row of sub-pixel unit.

### Claim 15 (depends on 1)

A display panel, comprising: the array substrate according to claim 1.

### Claim 16 (depends on 1)

A display device, comprising: the array substrate according to claim 1.

### Claim 17 (depends on 15)

A display device, comprising: the display panel according to claim 15.