# US 12,004,399 B2 · Organic light-emitting diode display panel

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- Number: US 12,004,399 B2
- Document ID: US12004399B2
- Status: Granted
- Kind: B2
- Application number: 16/961,119
- Filed: 2020-04-09
- Published: 2023-05-25
- Granted: 2024-06-04
- Earliest claimed: 2020-03-19
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Jun Chen
- Web page: https://patentgrep.com/patent/US12004399B2

## CPC

- H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths
- H10K 59/95: wherein all light-emitting elements are organic, e.g. assembled OLED displays
- H10K 59/873: {Encapsulations}
- H10K 59/8051: {Anodes}
- H10K 59/8052: {Cathodes}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic light-emitting diode display panel is disclosed. By using four display panels sequentially disposed in a stack arrangement from top to bottom, light emitted in a same direction from each of the display panels, and subpixels of the four display panels not overlapping one another, a screen resolution of the organic light-emitting diode display panel can increase by three times without increasing pixel density of masks or density of array layers.

## Claims

### Claim 1

An organic light-emitting diode (OLED) display panel, comprising:
a first display panel, a second display panel, a third display panel, and a fourth display panel all sequentially disposed in a stack arrangement from top to bottom, wherein an optical adhesive layer is disposed between the second display panel and the third display panel;
wherein each of the first display panel, the second display panel, the third display panel, and the fourth display panel comprises a plurality of subpixels spaced apart from each other, and the plurality of subpixels comprise a plurality of first subpixels, a plurality of second subpixels, and a plurality of third subpixels all spaced apart from each other in sequence;
wherein each of the first display panel, the second display panel, the third display panel, and the fourth display panel is provided with a light-emitting direction the same as each other, and each of the first display panel, the second display panel, the third display panel, and the fourth display panel has light transmittance,
wherein the first display panel and the second display panel share a first light-transmissive substrate, the first display panel is disposed on the first light-transmissive substrate, the first light-transmissive substrate is disposed on the second display panel;
the third display panel and the fourth display panel share a second light-transmissive substrate, the third display panel is disposed on the second light-transmissive substrate, the second light-transmissive substrate is disposed on the fourth display panel;
the fourth display panel comprises:
a fourth thin-film encapsulation layer;
a reflective cathode layer disposed on the fourth thin-film encapsulation layer;
a fourth OLED layer disposed on the reflective cathode layer; and
a fourth array layer disposed on the fourth OLED layer;
the second light-transmissive substrate is disposed on the fourth array layer, and the fourth array layer is provided with an anode layer.

### Claim 2 (depends on 1)

The OLED display panel of claim 1, wherein orthographic projections of the subpixels projected on a horizontal surface are not overlapping one another.

### Claim 3 (depends on 1)

The OLED display panel of claim 1, wherein the third display panel comprises:
a third array layer disposed on the second light-transmissive substrate;
a third OLED layer disposed on the third array layer;
a third translucent cathode layer disposed on the third OLED layer; and
a third thin-film encapsulation layer disposed on the third translucent cathode layer.

### Claim 4 (depends on 3)

The OLED display panel of claim 3, wherein the anode layer in the fourth array layer is transparent, and the third array layer is provided with a transparent anode layer.

### Claim 5 (depends on 1)

The OLED display panel of claim 1, wherein the second display panel comprises:
a second thin-film encapsulation layer;
a second translucent cathode layer disposed on the second thin-film encapsulation layer;
a second OLED layer disposed on the second translucent cathode layer; and
a second array layer disposed on the second OLED layer;
wherein the first light-transmissive substrate is disposed on the second array layer.

### Claim 6 (depends on 5)

The OLED display panel of claim 5, wherein the first display panel comprises:
a first array layer disposed on the first light-transmissive substrate;
a first OLED layer disposed on the first array layer;
a first translucent cathode layer disposed on the first OLED layer; and
a first thin-film encapsulation layer disposed on the first translucent cathode layer.

### Claim 7 (depends on 6)

The OLED display panel of claim 6, wherein each of the second array layer and the first array layer is provided with a transparent anode layer.

### Claim 8

An organic light-emitting diode (OLED) display panel, comprising:
a first display panel, a second display panel, a third display panel, and a fourth display panel all sequentially disposed in a stack arrangement from top to bottom;
wherein each of the first display panel, the second display panel, the third display panel, and the fourth display panel comprises a plurality of subpixels spaced apart from each other;
wherein each of the first display panel, the second display panel, the third display panel, and the fourth display panel is provided with a light-emitting direction the same as each other, and each of the first display panel, the second display panel, the third display panel, and the fourth display panel has light transmittance,
wherein the first display panel and the second display panel share a first light-transmissive substrate, the first display panel is disposed on the first light-transmissive substrate, the first light-transmissive substrate is disposed on the second display panel;
the third display panel and the fourth display panel share a second light-transmissive substrate, the third display panel is disposed on the second light-transmissive substrate, the second light-transmissive substrate is disposed on the fourth display panel;
the fourth display panel comprises:
a fourth thin-film encapsulation layer;
a reflective cathode layer disposed on the fourth thin-film encapsulation layer;
a fourth OLED layer disposed on the reflective cathode layer; and
a fourth array layer disposed on the fourth OLED layer;
the second light-transmissive substrate is disposed on the fourth array layer, and the fourth array layer is provided with an anode layer.

### Claim 9 (depends on 8)

The OLED display panel of claim 8, wherein orthographic projections of the subpixels projected on a horizontal surface are not overlapping one another.

### Claim 10 (depends on 8)

The OLED display panel of claim 8, wherein the third display panel comprises:
a third array layer disposed on the second light-transmissive substrate;
a third OLED layer disposed on the third array layer;
a third translucent cathode layer disposed on the third OLED layer; and
a third thin-film encapsulation layer disposed on the third translucent cathode layer.

### Claim 11 (depends on 10)

The OLED display panel of claim 10, wherein the anode layer in the fourth array layer is transparent, and the third array layer is provided with a transparent anode layer.

### Claim 12 (depends on 8)

The OLED display panel of claim 8, wherein the second display panel comprises:
a second thin-film encapsulation layer;
a second translucent cathode layer disposed on the second thin-film encapsulation layer;
a second OLED layer disposed on the second translucent cathode layer; and
a second array layer disposed on the second OLED layer;
wherein the first light-transmissive substrate is disposed on the second array layer.

### Claim 13 (depends on 12)

The OLED display panel of claim 12, wherein the first display panel comprises:
a first array layer disposed on the first light-transmissive substrate;
a first OLED layer disposed on the first array layer;
a first translucent cathode layer disposed on the first OLED layer; and
a first thin-film encapsulation layer disposed on the first translucent cathode layer.

### Claim 14 (depends on 13)

The OLED display panel of claim 13, wherein each of the second array layer and the first array layer is provided with a transparent anode layer.

### Claim 15 (depends on 8)

The OLED display panel of claim 8, wherein the plurality of subpixels comprise a plurality of first subpixels, a plurality of second subpixels, and a plurality of third subpixels all spaced apart from each other in sequence.

### Claim 16 (depends on 8)

The OLED display panel of claim 8, wherein an optical adhesive layer is disposed between the second display panel and the third display panel.