# US 11,308,874 B2 · Display device

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- Number: US 11,308,874 B2
- Document ID: US11308874B2
- Status: Granted
- Kind: B2
- Application number: 16/358,700
- Filed: 2019-03-20
- Published: 2019-12-26
- Granted: 2022-04-19
- Earliest claimed: 2018-06-21
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Tae Young Kim; Jong Woo Park; Hyo Jung Kim; Ki Ju Im; Young Tae Choi
- Web page: https://patentgrep.com/patent/US11308874B2

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- H10D 30/701: {IGFETs having ferroelectric gate insulators, e.g. ferroelectric FETs}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2300/0809: Several active elements per pixel in active matrix panels
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0852: being a dynamic memory with more than 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: 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)
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device including an emitting element. A first transistor includes a first electrode electrically connected to a first supply voltage line, a second electrode electrically connected to the emitting element, and a gate electrode receiving a data signal, the first transistor being configured to transfer a driving current to the emitting element based on the data signal. A capacitor is connected between the gate electrode of the first transistor and the first supply voltage line. An electric field generating element is connected between the second electrode of the first transistor and the gate electrode of the first transistor and includes ferroelectrics.

## Claims

### Claim 1

A display device comprising:
a substrate;
a semiconductor layer disposed on the substrate, the semiconductor layer comprising a first region, a second region disposed on one side of the first region where a first electrode of a transistor is formed, and a third region disposed on another side of the first region where a second electrode of the transistor is formed;
a first insulating layer disposed on the semiconductor layer;
a first conductive layer disposed on the first insulating layer and comprising a gate electrode overlapping with the first region; and
a ferroelectric layer disposed on the first insulating layer and overlapping with at least a part of the second region of the semiconductor layer,
wherein the ferroelectric layer contacts upper and lateral side surfaces of the first conductive layer and a side surface, and not top and bottom surfaces, of at least the second electrode.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the ferroelectric layer is in direct contact with the gate electrode and partially overlaps with the gate electrode.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the ferroelectric layer overlaps with at least a part of the first region.

### Claim 4 (depends on 1)

The display device of claim 1, wherein the ferroelectric layer is in direct contact with the gate electrode and does not overlap with the gate electrode.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the ferroelectric layer overlaps with at least a part of the first region.