# US 2021/0241694 A1 · Light-emitting circuit and illumining method thereof, drive sub-circuit, drive circuit, display panel 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 2021/0241694 A1
- Document ID: US20210241694A1
- Status: Published application
- Kind: A1
- Application number: 17/051,623
- Filed: 2020-04-27
- Published: 2021-08-05
- Earliest claimed: 2019-05-05
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Mingi CHU; Chinlung LIAO; Changyen WU; Fei YANG
- Web page: https://patentgrep.com/patent/US20210241694A1

## CPC

- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- 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
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/0443: with several sub-pixels for the same colour in a pixel, not specifically used to display gradations (G09G3/364 takes precedence)
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- 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 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- 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 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/043: Preventing or counteracting the effects of ageing
- 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

The present disclosure provides a light-emitting circuit, an illumining method thereof, a drive sub-circuit, a drive circuit, a display panel, and a display device. The light-emitting circuit includes N light-emitting layers and N+1 electrode layers, wherein the N light-emitting layers and the N+1 electrode layers are arranged in a laminated manner, and an nth light-emitting layer is provided between an nth electrode layer and an (n+1)th electrode layer; and N is an integer greater than 1, and n is a positive integer less than or equal to N.

## Claims

### Claim 1

A light-emitting circuit, comprising N light-emitting layers and N+1 electrode layers, wherein the N light-emitting layers and the N+1 electrode layers are arranged in a laminated manner, and an nth light-emitting layer is provided between an nth electrode layer and an (n+1)th electrode layer; and
N is an integer greater than 1, and n is a positive integer less than or equal to N.

### Claim 2 (depends on 1)

The light-emitting circuit according to claim 1, wherein colors of the N light-emitting layers are different from each other.

### Claim 3 (depends on 1)

The light-emitting circuit according to claim 1, wherein N is equal to 3;
the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the third light-emitting layer is a green light-emitting layer;
the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a red light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the third light-emitting layer is a red light-emitting layer;
the first light-emitting layer is a blue light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a red light-emitting layer; or
the first light-emitting layer is a blue light-emitting layer, the second light-emitting layer is a red light-emitting layer, and the third light-emitting layer is a green light-emitting layer.

### Claim 4 (depends on 1)

The light-emitting circuit according to claim 1, wherein the N light-emitting layers and the N+1 electrode layers are alternately arranged.

### Claim 5 (depends on 4)

The light-emitting circuit according to claim 4, comprising three light-emitting layers and four electrode layers,
wherein the three light-emitting layers are respectively a first light-emitting layer, a second light-emitting layer and a third light-emitting layer; the four electrode layers are respectively a first electrode layer, a second electrode layer, a third electrode layer and a fourth electrode layer;
wherein the first electrode layer, the first light-emitting layer and the second electrode layer form a first light-emitting sub-circuit for emitting light of a first color;
the second electrode layer, the second light-emitting layer and the third electrode layer form a second light-emitting sub-circuit for emitting light of a second color; and
the third electrode layer, the third light-emitting layer and the fourth electrode layer form a third light-emitting sub-circuit for emitting light of a third color.

### Claim 6 (depends on 1)

An illumining method of a light-emitting circuit applied to the light-emitting circuit according to claim 1, the illumining method of the light-emitting circuit comprising:
respectively providing corresponding drive voltages for N+1 electrode layers to illumine the light-emitting circuit during a light-emitting stage.

### Claim 7 (depends on 6)

The illumining method of the light-emitting circuit according to claim 6, wherein the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the illumining method of the light-emitting circuit, during the light-emitting stage, comprising:
controlling a drive voltage supplied to the first electrode layer to be a first high voltage, controlling the drive voltage supplied to the second electrode layer to be a second high voltage, and controlling the drive voltage supplied to the third electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage, so that the light-emitting circuit emits yellow light;
controlling the drive voltage supplied to the first electrode layer to be a second high voltage, and controlling the drive voltage supplied to the second electrode layer, the drive voltage supplied to the third electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage, so that the light-emitting circuit emits red light;
controlling the drive voltage supplied to the second electrode layer to be a second high voltage, controlling the drive voltage supplied to the first electrode layer, the drive voltage supplied to the third electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage, so that the light-emitting circuit emits green light;
controlling the drive voltage supplied to the third electrode layer to be a second high voltage, controlling the drive voltage supplied to the first electrode layer, the drive voltage supplied to the second electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage, so that the light-emitting circuit emits blue light; or
controlling the drive voltage supplied to the first electrode layer and the drive voltage supplied to the third electrode layer to be a second high voltage, and controlling the drive voltage supplied to the second electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage, so that the light-emitting circuit emits fuchsia light.

### Claim 8 (depends on 6)

The illumining method of the light-emitting circuit according to claim 6, wherein the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the light-emitting stage comprises a plurality of light-emitting sub-stages which are sequentially provided; the light-emitting sub-stage comprises a first light-emitting time period and a second light-emitting time period which are sequentially provided;
the illumining method of the lighting circuit comprising:
controlling the drive voltage supplied to the first electrode layer and the drive voltage supplied to the fourth electrode layer to be a low voltage during the light-emitting stage; controlling the drive voltage supplied to the second electrode layer to be a second high voltage and controlling the drive voltage to the third electrode layer to be a low voltage during the first light-emitting time period; controlling the drive voltage supplied to the second electrode layer to be a low voltage and controlling the drive voltage supplied to the third electrode layer to be a second high voltage during the second light-emitting time period so as to control the light-emitting circuit to emit dark green light; or
controlling the drive voltage supplied to the fourth electrode layer to be a low voltage during the light-emitting stage; controlling the drive voltage supplied to the first electrode layer to be a low voltage, controlling the drive voltage supplied to the second electrode layer to be a second high voltage, and controlling the drive voltage to the third electrode layer to be a low voltage during the first light-emitting time period; and controlling the drive voltage supplied to the first electrode layer to be a high voltage, controlling the drive voltage supplied to the second electrode layer to be a low voltage and controlling the drive voltage supplied to the third electrode layer to be a second high voltage during the second light-emitting time period so as to control the light-emitting circuit to emit white light.

### Claim 9 (depends on 1)

A drive sub-circuit for supplying a drive voltage to an nth electrode layer in the light-emitting circuit according to claim 1, comprising a voltage selector and M pixel drive sub-circuits, wherein M is a positive integer;
the mth pixel drive sub-circuit is used for controlling to output an mth drive voltage to the voltage selector under the control of a gate drive signal input by a corresponding gate line and an mth data voltage on an mth data line; m is a positive integer less than or equal to M; and
the voltage selector is used for controlling a drive voltage supplied by one pixel drive sub-circuit or a predetermined drive voltage input by a predetermined drive voltage terminal to be provided to the nth electrode layer under the control of a selection control signal input by a selection control terminal of the voltage selector.

### Claim 10 (depends on 9)

The drive sub-circuit according to claim 9, wherein the mth pixel drive sub-circuit comprises an mth drive module, an mth data writing module, and an mth energy storage module,
wherein a control terminal of the mth data writing module is connected with the corresponding gate line, a first terminal of the mth data writing module is connected with the mth data line, a second terminal of the mth data writing module is connected with the control terminal of the mth drive module, and the mth data writing module is used for controlling the mth data voltage to be written into the control terminal of the mth drive module under the control of the gate drive signal;
the mth drive module is used for controlling the mth drive voltage to be outputted to the voltage selector under the control of the potential of the control terminal of the mth drive module; and
the mth energy storage module is connected with the control terminal of the mth drive module for maintaining the potential of the control terminal of the mth drive module.

### Claim 11 (depends on 9)

The drive sub-circuit according to claim 9, wherein the voltage selector comprises M+1 selective switch circuits;
the mth selective switch circuit is used for controlling the mth drive voltage supplied by the mth pixel drive sub-circuit to be provided to the nth electrode layer under the control of the selection control signal input by the selection control terminal; and
the (M+1)th selective switch circuit is used for controlling the predetermined drive voltage input by the predetermined drive voltage terminal to be provided to the nth electrode layer under the control of the selection control signal input by the selection control terminal.

### Claim 12 (depends on 9)

A drive circuit, comprising N drive sub-circuits according to claim 9;
wherein an nth drive sub-circuit is connected with an nth electrode layer included in a light-emitting circuit for supplying a corresponding drive voltage for the nth electrode layer; and
n is a positive integer less than or equal to N, and N is an integer greater than 1.

### Claim 13 (depends on 12)

The drive circuit according to claim 12, further comprising a voltage supply unit;
wherein the voltage supply unit is connected with an (N+1)th electrode layer included in the light-emitting circuit for supplying the corresponding drive voltage to the (N+1)th electrode layer.

### Claim 14 (depends on 1)

A display panel, comprising the light-emitting circuit according to claim 1.

### Claim 15 (depends on 12)

A display device, comprising the drive circuit according to claim 12.

### Claim 16 (depends on 14)

The display panel according to claim 14, wherein the display panel is an Organic light-emitting Diode (OLED) display panel.

### Claim 17 (depends on 2)

The light-emitting circuit according to claim 2, wherein N is equal to 3;
the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the first light-emitting layer is a red light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the third light-emitting layer is a green light-emitting layer;
the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a red light-emitting layer, and the third light-emitting layer is a blue light-emitting layer;
the first light-emitting layer is a green light-emitting layer, the second light-emitting layer is a blue light-emitting layer, and the third light-emitting layer is a red light-emitting layer;
the first light-emitting layer is a blue light-emitting layer, the second light-emitting layer is a green light-emitting layer, and the third light-emitting layer is a red light-emitting layer; or
the first light-emitting layer is a blue light-emitting layer, the second light-emitting layer is a red light-emitting layer, and the third light-emitting layer is a green light-emitting layer.

### Claim 18 (depends on 10)

The drive sub-circuit according to claim 10, wherein the voltage selector comprises M+1 selective switch circuits;
the mth selective switch circuit is used for controlling the mth drive voltage supplied by the mth pixel drive sub-circuit to be provided to the nth electrode layer under the control of the selection control signal input by the selection control terminal; and
the (M+1)th selective switch circuit is used for controlling the predetermined drive voltage input by the predetermined drive voltage terminal to be provided to the nth electrode layer under the control of the selection control signal input by the selection control terminal.

### Claim 19 (depends on 13)

A display device, comprising the drive circuit according to claim 13.

### Claim 20 (depends on 1)

The light-emitting circuit according to claim 1, wherein a luminance magnitude of each of the N light-emitting layers is adjusted by changing a voltage of each of the N+1 electrode layers.