# US 12,004,374 B2 · Display panel, manufacturing method thereof, 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 12,004,374 B2
- Document ID: US12004374B2
- Status: Granted
- Kind: B2
- Application number: 17/438,999
- Filed: 2021-07-26
- Published: 2024-01-25
- Granted: 2024-06-04
- Earliest claimed: 2021-07-20
- Assignees: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Chuanbao Luo
- Web page: https://patentgrep.com/patent/US12004374B2

## CPC

- G02F 1/133371: {Cells with varying thickness of the liquid crystal layer}
- H10K 59/1213: {the pixel elements being TFTs}
- G02F 1/13312: {Circuits comprising photodetectors for purposes other than feedback}
- G02F 1/136209: {Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- H10D 30/6734: {having gate electrodes arranged on both top and bottom sides of the channel, e.g. dual-gate TFTs}
- H10D 30/6755: {Oxide semiconductors, e.g. zinc oxide, copper aluminium oxide or cadmium stannate}
- H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO}
- H10D 86/60: wherein the TFTs are in active matrices
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/65: OLEDs integrated with inorganic image sensors
- H10K 59/126: Shielding, e.g. light-blocking means over the TFTs
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

A display panel, a manufacturing method thereof, and a display device are provided. Through a configuration of a capacitor in the display panel, where the capacitor is connected to a first thin film transistor, a photosensitive pattern in the capacitor senses light, such that when the light varies, a varying charge quantity of the photosensitive pattern in the capacitor varies current of the first thin film transistor, increasing a sensitometric characteristic of the first thin film transistor, and increasing fingerprint recognition effect, and a second gate is configured to be a capacitor polar plate, decreasing a thickness of an array substrate.

## Claims

### Claim 1

A display panel, comprising an array substrate, wherein the array substrate comprises:
a substrate;
a first gate disposed on one side of the substrate;
an active pattern disposed on one side of the first gate away from the substrate;
a second gate disposed on one side of the active pattern away from the first gate;
a photosensitive pattern disposed on one side of the second gate away from the active pattern; and
a polar plate disposed on one side of the photosensitive pattern away from the second gate;
wherein the array substrate further comprises a first source and a first drain, the first gate, the first source, the first drain, the second gate, and the active pattern form a first thin film transistor, and the second gate, the photosensitive pattern, and the polar plate form a capacitor.

### Claim 2 (depends on 1)

The display panel as claimed in claim 1, wherein the first gate is disposed in a same layer as the first source, the first gate is disposed insulated from the first source, the first gate is disposed in the same layer as the first drain, and the first gate is disposed insulated from the first drain.

### Claim 3 (depends on 2)

The display panel as claimed in claim 2, wherein the array substrate comprises a second source, a third gate, and a first shading pattern, the second source, the first drain, the third gate, and the active pattern form a second thin film transistor, the first shading pattern is disposed corresponding to the active pattern of the second thin film transistor, the first shading pattern is disposed in the same layer as the first gate, the first source, and the first drain, and the first shading pattern is disposed insulated from the first gate, the first source, and the first drain.

### Claim 4 (depends on 3)

The display panel as claimed in claim 3, wherein the array substrate comprises a pixel electrode layer disposed on one side of the photosensitive pattern away from the second gate, the pixel electrode layer comprises a pixel electrode and a polar plate, and the polar plate is insulated from the pixel electrode.

### Claim 5 (depends on 3)

The display panel as claimed in claim 3, wherein the array substrate comprises a transparent conductive layer and a pixel electrode layer, the transparent conductive layer is disposed between the pixel electrode layer and the photosensitive pattern, the transparent conductive layer forms a polar plate, and the polar plate is disposed insulated from the pixel electrode layer.

### Claim 6 (depends on 3)

The display panel as claimed in claim 3, wherein the array substrate comprises a second shading pattern correspondingly disposed on the second thin film transistor.

### Claim 7 (depends on 3)

The display panel as claimed in claim 3, wherein the second gate is disposed in a same layer as the third gate.

### Claim 8 (depends on 1)

The display panel as claimed in claim 1, wherein a material of the photosensitive pattern comprises at least one of amorphous silicon or thiophene organic materials.

### Claim 9 (depends on 1)

The display panel as claimed in claim 1, wherein the array substrate comprises:
a shading layer disposed on one side of the substrate and forming a first shading pattern;
a buffer layer disposed on one side of the shading layer away from the substrate; and
a metal layer forming the first gate, the first source, and the first drain.

### Claim 10 (depends on 1)

The display panel as claimed in claim 1, wherein the array substrate comprises:
a shading layer disposed on one side of the substrate and forming a first shading pattern;
a buffer layer disposed on one side of the shading layer away from the substrate;
a first metal layer disposed on one side of the buffer layer away from the shading layer;
a first gate insulation layer disposed on one side of the first metal layer away from the buffer layer;
an active layer disposed on one side of the first gate insulation layer away from the first metal layer;
a second gate insulation layer disposed on one side of the active layer away from the first metal layer; and
a second metal layer disposed on one side of the second gate insulation layer away from the active layer and forming the second gate;
wherein the first metal layer forms the first gate, the first source, and the first drain.

### Claim 11

A display device, comprising a display panel and electronic components, wherein the display panel comprises an array substrate, and the array substrate comprises:
a substrate;
a first gate disposed on one side of the substrate;
an active pattern disposed on one side of the first gate away from the substrate;
a second gate disposed on one side of the active pattern away from the first gate;
a photosensitive pattern disposed on one side of the second gate away from the active pattern; and
a polar plate disposed on one side of the photosensitive pattern away from the second gate;
wherein the array substrate further comprises a first source and a first drain, the first gate, the first source, the first drain, the second gate, and the active pattern form a first thin film transistor, and the second gate, the photosensitive pattern, and the polar plate form a capacitor.

### Claim 12 (depends on 11)

The display device as claimed in claim 11, wherein the electronic components comprise an under-screen camera.

### Claim 13 (depends on 11)

The display device as claimed in claim 11, wherein the display panel comprises a liquid crystal display panel or an organic light-emitting diode (OLED) display panel.

### Claim 14 (depends on 11)

The display device as claimed in claim 11, wherein the first gate is disposed in a same layer as the first source, the first gate is disposed insulated from the first source, the first gate is disposed in the same layer as the first drain, and the first gate is disposed insulated from the first drain.

### Claim 15 (depends on 14)

The display device as claimed in claim 14, wherein the array substrate comprises a second source, a third gate, and a first shading pattern, the second source, the first drain, the third gate, and the active pattern form a second thin film transistor, the first shading pattern is disposed corresponding to the active pattern of the second thin film transistor, the first shading pattern is disposed in the same layer as the first gate, the first source, and the first drain, and the first shading pattern is disposed insulated from the first gate, the first source, and the first drain.

### Claim 16 (depends on 15)

The display device as claimed in claim 15, wherein the array substrate comprises a pixel electrode layer disposed on one side of the photosensitive pattern away from the second gate, the pixel electrode layer comprises a pixel electrode and a polar plate, and the polar plate is insulated from the pixel electrode.

### Claim 17 (depends on 15)

The display device as claimed in claim 15, wherein the array substrate comprises a transparent conductive layer and a pixel electrode layer, the transparent conductive layer is disposed between the pixel electrode layer and the photosensitive pattern, the transparent conductive layer forms a polar plate, and the polar plate is disposed insulated from the pixel electrode layer.

### Claim 18 (depends on 15)

The display device as claimed in claim 15, wherein the array substrate comprises a second shading pattern correspondingly disposed on the second thin film transistor.

### Claim 19 (depends on 15)

The display device as claimed in claim 15, wherein the second gate is disposed in a same layer as the third gate.

### Claim 20

A manufacturing method of a display panel, comprising:
providing a substrate;
forming a first metal layer on the substrate and processing the first metal layer to form a first gate, a first source, a first drain, a second source, and a second drain;
forming a second gate on one side of the first metal layer away from the substrate;
forming a photosensitive pattern on one side of the second gate away from the first metal layer; and
forming a polar plate on one side of the photosensitive pattern away from the second gate; wherein the first gate, the first source, the second gate, and an active pattern form a first thin film transistor, and the second gate, the photosensitive pattern, and the polar plate form a capacitor.