# US 12,114,532 B2 · Display substrate and display device

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- Number: US 12,114,532 B2
- Document ID: US12114532B2
- Status: Granted
- Kind: B2
- Application number: 17/628,942
- Filed: 2021-03-09
- Published: 2022-08-18
- Granted: 2024-10-08
- Earliest claimed: 2020-04-30
- Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Inventors: Yonglin Guo; Hongmei Fan; Xinyu Wei; Yuqian Pang; Kai Zhang
- Web page: https://patentgrep.com/patent/US12114532B2

## CPC

- H10K 59/1213: {the pixel elements being TFTs}
- H10K 59/1216: {the pixel elements being capacitors}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0823: used to establish symmetry in driving, e.g. with polarity inversion
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- 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)

## Abstract

Provided is a display substrate, including a base substrate and a plurality of pixel units arranged on the base substrate; each pixel unit includes constant voltage terminals and a dual-gate transistor; a part of an active region of each dual-gate transistor, which is located between two gates, is an intermediate part; except the pixel units closest to the first side, each pixel unit includes a compensation structure; the compensation structure is connected to one of the constant voltage terminals of the pixel unit where the compensation structure is located, and compensates for at least one dual-gate transistor of a pixel unit adjacent to the pixel unit where the compensation structure is located in a direction toward the first side; the compensation structure overlaps and is insulated from the intermediate part of the dual-gate transistor for which the compensation structure compensates.

## Claims

### Claim 1

A display substrate, comprising a base substrate and a plurality of pixel units arranged in an array on the base substrate, with the array having a first side and a second side, which are opposite to each other, wherein
each pixel unit comprises at least one constant voltage terminal and at least one dual-gate transistor, each dual-gate transistor comprises two gates which are spaced apart, and a part of an active region of the dual-gate transistor, which is located between the two gates, is an intermediate part;
except the pixel units closest to the first side, each pixel unit further comprises a compensation structure, the compensation structure is connected to one constant voltage terminal of the pixel unit where the compensation structure is located, and compensates for the at least one dual-gate transistor of a pixel unit adjacent to the pixel unit where the compensation structure is located in a direction toward the first side;
the compensation structure overlaps and is insulated from the intermediate part of the dual-gate transistor for which the compensation structure compensates, and the compensation structure and the two gates of the dual-gate transistor for which the compensation structure compensates are located on a same side of the active region of the dual-gate transistor with respect to the base substrate; and
the pixel units closest to the second side are redundant pixel units which are not used for display.

### Claim 2 (depends on 1)

The display substrate of claim 1, wherein each pixel unit further comprises a first constant voltage terminal, a second constant voltage terminal, and a driving transistor and a light-emitting device which are connected in series between the first constant voltage terminal and the second constant voltage terminal;
the driving transistor is configured to control a current flowing through the driving transistor according to a voltage of a gate of the driving transistor; and
the light-emitting device of the redundant pixel unit does not have a light emitting function.

### Claim 3 (depends on 2)

The display substrate of claim 2, wherein
the light-emitting device is an organic light-emitting diode.

### Claim 4 (depends on 2)

The display substrate of claim 2, wherein
the compensation structure is connected to the first constant voltage terminal of the pixel unit where the compensation structure is located.

### Claim 5 (depends on 2)

The display substrate of claim 2, wherein
the compensation structure is connected to the second constant voltage terminal of the pixel unit where the compensation structure is located.

### Claim 6 (depends on 2)

The display substrate of claim 2, wherein
each pixel unit comprises a first dual-gate transistor, a first electrode of the first dual-gate transistor is connected to the gate of the driving transistor, and the first dual-gate transistor is configured to transmit a data voltage to the gate of the driving transistor; and
except the redundant pixel units, the first dual-gate transistor of each pixel unit is compensated by the compensation structure.

### Claim 7 (depends on 6)

The display substrate of claim 6, wherein
a second electrode of the first dual-gate transistor is connected to a second electrode of the driving transistor.

### Claim 8 (depends on 7)

The display substrate of claim 7, wherein each pixel unit further comprises a data terminal, a gate line terminal, a control terminal, a switch transistor, a first control transistor, a second control transistor, and a storage capacitor;
the first control transistor comprises a gate connected to the control terminal, a first electrode connected to the first constant voltage terminal, and a second electrode connected to a first electrode of the driving transistor;
the second control transistor comprises a gate connected to the control terminal, a first electrode connected to the second electrode of the driving transistor, and a second electrode connected to a first electrode of the light-emitting device;
a second electrode of the light-emitting device is connected to the second constant voltage terminal;
the switch transistor comprises a gate connected to the gate line terminal, a first electrode connected to the first electrode of the driving transistor, and a second electrode connected to the data terminal;
gates of the first dual-gate transistor are connected to the gate line terminal; and
the storage capacitor comprises a first electrode connected to the first constant voltage terminal, and a second electrode connected to the gate of the driving transistor.

### Claim 9 (depends on 8)

The display substrate of claim 8, wherein each pixel unit further comprises an initial signal terminal, a reset terminal, a first reset transistor, and a second reset terminal;
the first reset terminal comprises a gate connected to the reset terminal, a first electrode connected to the gate of the driving transistor, and a second electrode connected to the initial signal terminal; and
the second reset terminal comprises a gate connected to the reset terminal, a first electrode connected to the first electrode of the light-emitting device, and a second electrode connected to the initial signal terminal.

### Claim 10 (depends on 9)

The display device of claim 9, wherein each pixel unit of the display substrate further comprises an initial signal terminal, a reset terminal, a first reset transistor, and a second reset terminal;
the first reset terminal comprises a gate connected to the reset terminal, a first electrode connected to the gate of the driving transistor, and a second electrode connected to the initial signal terminal; and
the second reset terminal comprises a gate connected to the reset terminal, a first electrode connected to the first electrode of the light-emitting device, and a second electrode connected to the initial signal terminal.

### Claim 11 (depends on 1)

The display substrate of claim 1, wherein
the plurality of pixel units in the array are arranged in rows and columns;
each row of pixel units is connected to one gate line, and each column of pixel units is connected to one data line;
a direction pointing from the first side to the second side is parallel to a direction of the rows; and
the pixel units in the column closest to the second side are the redundant pixel units.

### Claim 12 (depends on 1)

A display device, comprising:
the display substrate of claim 1.

### Claim 13 (depends on 12)

The display device of claim 12, further comprising:
a frame disposed on a light emitting side of the display substrate;
wherein an orthographic projection of the frame on the display substrate covers the redundant pixel units, but does not overlap the other pixel units except the redundant pixel units.

### Claim 14 (depends on 12)

The display device of claim 12, wherein each pixel unit of the display substrate further comprises a first constant voltage terminal, a second constant voltage terminal, and a driving transistor and a light-emitting device which are connected in series between the first constant voltage terminal and the second constant voltage terminal;
the driving transistor is configured to control a current flowing through the driving transistor according to a voltage of a gate of the driving transistor; and
the light-emitting device of the redundant pixel unit does not have a light emitting function.

### Claim 15 (depends on 14)

The display device of claim 14, wherein
the light-emitting device is an organic light-emitting diode.

### Claim 16 (depends on 14)

The display device of claim 14, wherein
the compensation structure is connected to the first constant voltage terminal of the pixel unit where the compensation structure is located.

### Claim 17 (depends on 14)

The display device of claim 14, wherein
the compensation structure is connected to the second constant voltage terminal of the pixel unit where the compensation structure is located.

### Claim 18 (depends on 14)

The display device of claim 14, wherein
each pixel unit of the display substrate comprises a first dual-gate transistor, a first electrode of the first dual-gate transistor is connected to the gate of the driving transistor, and the first dual-gate transistor is configured to transmit a data voltage to the gate of the driving transistor; and
except the redundant pixel units, the first dual-gate transistor of each pixel unit is compensated by the compensation structure.

### Claim 19 (depends on 18)

The display device of claim 18, wherein
a second electrode of the first dual-gate transistor is connected to a second electrode of the driving transistor.

### Claim 20 (depends on 19)

The display device of claim 19, wherein each pixel unit of the display substrate further comprises a data terminal, a gate line terminal, a control terminal, a switch transistor, a first control transistor, a second control transistor, and a storage capacitor;
the first control transistor comprises a gate connected to the control terminal, a first electrode connected to the first constant voltage terminal, and a second electrode connected to a first electrode of the driving transistor;
the second control transistor comprises a gate connected to the control terminal, a first electrode connected to the second electrode of the driving transistor, and a second electrode connected to a first electrode of the light-emitting device;
a second electrode of the light-emitting device is connected to the second constant voltage terminal;
the switch transistor comprises a gate connected to the gate line terminal, a first electrode connected to the first electrode of the driving transistor, and a second electrode connected to the data terminal;
gates of the first dual-gate transistor are connected to the gate line terminal; and
the storage capacitor comprises a first electrode connected to the first constant voltage terminal, and a second electrode connected to the gate of the driving transistor.