# US 12,004,400 B2 · Light-emitting apparatus, lighting device, display device, module, and electronic device

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- Number: US 12,004,400 B2
- Document ID: US12004400B2
- Status: Granted
- Kind: B2
- Application number: 17/414,502
- Filed: 2019-12-19
- Published: 2022-03-03
- Granted: 2024-06-04
- Earliest claimed: 2018-12-28
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Shunpei Yamazaki; Daisuke Kubota; Nobuharu Ohsawa; Takeyoshi Watabe; Taisuke Kamada
- Web page: https://patentgrep.com/patent/US12004400B2

## CPC

- H05B 45/20: Controlling the colour of the light
- H05B 45/40: Details of LED load circuits
- H10K 50/13: comprising stacked EL layers within one EL unit
- H10K 59/30: Devices specially adapted for multicolour light emission
- H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths
- H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]}
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 2101/20: Delayed fluorescence emission
- H10K 2101/27: {Combination of fluorescent and phosphorescent emission}
- H10K 2102/311: {Flexible OLED}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device that has a function of emitting visible light and infrared light and a function of detecting light. The display device is a display device including a first light-emitting device, a second light-emitting device, and a light-receiving device, in a display portion. The first light-emitting device includes a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The active layer includes an organic compound. The first light-emitting device emits infrared light emitted by the first light-emitting layer. The second light-emitting device emits visible light emitted by the second light-emitting layer. The light-receiving device has a function of absorbing at least part of visible light and infrared light.

## Claims

### Claim 1

A light-emitting apparatus comprising:
a first light-emitting device and a second light-emitting device,
wherein the first light-emitting device comprises a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode,
wherein the second light-emitting device comprises a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the common electrode,
wherein the second optical adjustment layer is positioned between the second pixel electrode and the common electrode,
wherein the first optical adjustment layer and the second optical adjustment layer are separately provided,
wherein the first light-emitting layer and the second light-emitting layer each comprise a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting device emits infrared light emitted by the first light-emitting layer, and
wherein the second light-emitting device emits visible light emitted by the second light-emitting layer.

### Claim 2 (depends on 1)

The light-emitting apparatus according to claim 1, further comprising:
a third light-emitting device,
wherein the first light-emitting device and the second light-emitting device further comprise a third light-emitting layer,
wherein the third light-emitting device comprises a third pixel electrode, a third optical adjustment layer, the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the common electrode,
wherein the third light-emitting layer comprises a region positioned between the first pixel electrode and the common electrode, a region positioned between the second pixel electrode and the common electrode, and a region positioned between the third pixel electrode and the common electrode,
wherein the third light-emitting device emits visible light emitted by the third light-emitting layer, and
wherein the second light-emitting layer and the third light-emitting layer emit light having different wavelengths from each other.

### Claim 3 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the first light-emitting device and the second light-emitting device further comprise a third light-emitting layer,
wherein the third light-emitting layer comprises a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode, and
wherein the first light-emitting device emits both infrared light emitted by the first light-emitting layer and visible light emitted by the third light-emitting layer.

### Claim 4 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the first light-emitting device and the second light-emitting device further comprise a charge-generation layer, and
wherein the charge-generation layer is positioned between the first light-emitting layer and the second light-emitting layer.

### Claim 5 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the first light-emitting layer comprises a region positioned between the first optical adjustment layer and the second light-emitting layer and a region positioned between the second optical adjustment layer and the second light-emitting layer.

### Claim 6

A light-emitting apparatus comprising:
a first light-emitting device and a second light-emitting device,
wherein the first light-emitting device comprises a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, a third light-emitting layer, a fourth light-emitting layer, and a common electrode,
wherein the second light-emitting device comprises a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, the fourth light-emitting layer, and the common electrode,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the common electrode,
wherein the second optical adjustment layer is positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer each comprise a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting layer is configured to emit infrared light,
wherein the second light-emitting layer is configured to emit visible light,
wherein the third light-emitting layer is configured to emit visible light having a shorter wavelength than visible light emitted by the second light-emitting layer,
wherein the fourth light-emitting layer is configured to emit visible light having a shorter wavelength than visible light emitted by the third light-emitting layer,
wherein the first light-emitting device emits infrared light emitted by the first light-emitting layer, and
wherein the second light-emitting device emits visible light emitted by the second light-emitting layer, the third light-emitting layer, or the fourth light-emitting layer.

### Claim 7 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the second light-emitting layer is configured to emit red light,
wherein the third light-emitting layer is configured to emit green light, and
wherein the fourth light-emitting layer is configured to emit blue light.

### Claim 8 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first light-emitting device and the second light-emitting device further comprise a first charge-generation layer, and
wherein the first charge-generation layer is positioned between the first light-emitting layer and the fourth light-emitting layer.

### Claim 9 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first light-emitting device and the second light-emitting device further comprise a second charge-generation layer, and
wherein the second charge-generation layer is positioned between the first light-emitting layer and the second light-emitting layer.

### Claim 10 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer are stacked in this order from a side close to the first optical adjustment layer, and
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer are stacked in this order from a side close to the second optical adjustment layer.

### Claim 11 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first light-emitting device emits both infrared light emitted by the first light-emitting layer and visible light emitted by the fourth light-emitting layer.

### Claim 12 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the first light-emitting layer.

### Claim 13 (depends on 6)

The light-emitting apparatus according to claim 6,
wherein the first optical adjustment layer is positioned between the common electrode and the first light-emitting layer.

### Claim 14

A display device comprising a display portion,
wherein the display portion comprises a first light-emitting device, a second light-emitting device, and a light-receiving device,
wherein the first light-emitting device comprises a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode,
wherein the second light-emitting device comprises a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the common electrode,
wherein the second optical adjustment layer is positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting layer and the second light-emitting layer each comprise a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode,
wherein the light-receiving device comprises a third pixel electrode, an active layer, and the common electrode,
wherein the active layer is positioned between the third pixel electrode and the common electrode,
wherein the active layer comprises an organic compound,
wherein the first light-emitting device emits infrared light emitted by the first light-emitting layer,
wherein the second light-emitting device emits visible light emitted by the second light-emitting layer, and
wherein the light-receiving device is configured to absorb at least part of visible light and infrared light.

### Claim 15 (depends on 14)

The display device according to claim 14,
wherein the first light-emitting device comprises a common layer,
wherein the second light-emitting device comprises the common electrode,
wherein the light-receiving device comprises the common layer, and
wherein the common layer comprises a region positioned between the first pixel electrode and the common electrode, a region positioned between the second pixel electrode and the common electrode, and a region positioned between the third pixel electrode and the common electrode.

### Claim 16 (depends on 14)

The display device according to claim 14, further comprising:
a third light-emitting device,
wherein the first light-emitting device and the second light-emitting device further comprise a third light-emitting layer,
wherein the third light-emitting device comprises a fourth pixel electrode, a third optical adjustment layer, the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the common electrode,
wherein the third light-emitting layer comprises a region positioned between the first pixel electrode and the common electrode, a region positioned between the second pixel electrode and the common electrode, and a region positioned between the fourth pixel electrode and the common electrode,
wherein the third light-emitting device emits visible light emitted by the third light-emitting layer, and
wherein the second light-emitting layer and the third light-emitting layer emit light having different wavelengths from each other.

### Claim 17 (depends on 14)

The display device according to claim 14,
wherein the first light-emitting device and the second light-emitting device further comprise a third light-emitting layer,
wherein the third light-emitting layer comprises a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode, and
wherein the first light-emitting device emits both infrared light emitted by the first light-emitting layer and visible light emitted by the third light-emitting layer.

### Claim 18 (depends on 14)

The display device according to claim 14,
wherein the first light-emitting device and the second light-emitting device further comprise a charge-generation layer, and
wherein the charge-generation layer is positioned between the first light-emitting layer and the second light-emitting layer.

### Claim 19 (depends on 14)

The display device according to claim 14,
wherein the first light-emitting layer comprises a region positioned between the first optical adjustment layer and the second light-emitting layer and a region positioned between the second optical adjustment layer and the second light-emitting layer.

### Claim 20

A display device comprising:
a display portion,
wherein the display portion comprises a first light-emitting device, a second light-emitting device, and a light-receiving device,
wherein the first light-emitting device comprises a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, a third light-emitting layer, a fourth light-emitting layer, and a common electrode,
wherein the second light-emitting device comprises a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, the fourth light-emitting layer, and the common electrode,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the common electrode,
wherein the second optical adjustment layer is positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer each comprise a region positioned between the first pixel electrode and the common electrode and a region positioned between the second pixel electrode and the common electrode,
wherein the first light-emitting layer is configured to emit infrared light,
wherein the second light-emitting layer is configured to emit visible light,
wherein the third light-emitting layer is configured to emit visible light having a shorter wavelength than visible light emitted by the second light-emitting layer,
wherein the fourth light-emitting layer is configured to emit visible light having a shorter wavelength than visible light emitted by the third light-emitting layer,
wherein the light-receiving device comprises a third pixel electrode, an active layer, and the common electrode,
wherein the active layer is positioned between the third pixel electrode and the common electrode,
wherein the active layer comprises an organic compound,
wherein the first light-emitting device emits infrared light emitted by the first light-emitting layer,
wherein the second light-emitting device emits visible light emitted by the second light-emitting layer, the third light-emitting layer, or the fourth light-emitting layer, and
wherein the light-receiving device is configured to absorb at least part of visible light and infrared light.

### Claim 21 (depends on 20)

The display device according to claim 20,
wherein the second light-emitting layer is configured to emit red light, and the third light-emitting layer is configured to emit green light, and
wherein the fourth light-emitting layer is configured to emit blue light.

### Claim 22 (depends on 20)

The display device according to claim 20,
wherein the first light-emitting device and the second light-emitting device further comprise a first charge-generation layer, and
wherein the first charge-generation layer is positioned between the first light-emitting layer and the fourth light-emitting layer.

### Claim 23 (depends on 20)

The display device according to claim 20,
wherein the first light-emitting device and the second light-emitting device further comprise a second charge-generation layer, and
wherein the second charge-generation layer is positioned between the first light-emitting layer and the second light-emitting layer.

### Claim 24 (depends on 20)

The display device according to claim 20,
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer are stacked in this order from a side close to the first optical adjustment layer, and
wherein the first light-emitting layer, the second light-emitting layer, the third light-emitting layer, and the fourth light-emitting layer are stacked in this order from a side close to the second optical adjustment layer.

### Claim 25 (depends on 20)

The display device according to claim 20,
wherein the first light-emitting device emits both infrared light emitted by the first light-emitting layer and visible light emitted by the fourth light-emitting layer.

### Claim 26 (depends on 20)

The display device according to claim 20,
wherein the first optical adjustment layer is positioned between the first pixel electrode and the first light-emitting layer.

### Claim 27 (depends on 20)

The display device according to claim 20,
wherein the display portion has flexibility.