Electronic device

Patent metadata

Field	Value
Publication number	US-2023140380-A1
Application number	US-202217880871-A
Country	US
Kind code	A1
Filing date	Aug 4, 2022
Priority date	Oct 28, 2021
Publication date	May 4, 2023
Grant date	—

Abstract

An electronic device including: a base layer; a display element layer disposed on the base layer and including a pixel defining layer that includes an opening, and a light emitting element and a light receiving element, which are separated by the pixel defining layer; and an input sensing layer disposed on the display element layer, wherein each of the light emitting element and the light receiving element includes: a first electrode; a hole transport region disposed on the first electrode; an electron transport region disposed on the hole transport region; and a second electrode disposed on the electron transport region, wherein the second electrode is a common layer in the light emitting element and the light receiving element, the light emitting element comprises a light emitting layer disposed between the hole transport region and the electron transport region, and the light receiving element comprises a light receiving layer which is provided between the first electrode and the second electrode and disposed in a layer different from the light emitting layer in a thickness direction of the electronic device.

First claim

What is claimed is:

1 . An electronic device, comprising:
a base layer; a display element layer disposed on the base layer and comprising a pixel defining layer that includes an opening, and a light emitting element and a light receiving element, which are separated by the pixel defining layer; and an input sensing layer disposed on the display element layer, wherein each of the light emitting element and the light receiving element comprises: a first electrode; a hole transport region disposed on the first electrode; an electron transport region disposed on the hole transport region; and a second electrode disposed on the electron transport region, wherein the second electrode is a common layer in the light emitting element and the light receiving element, the light emitting element comprises a light emitting layer disposed between the hole transport region and the electron transport region, and the light receiving element comprises a light receiving layer which is provided between the first electrode and the second electrode and disposed in a layer different from the light emitting layer in a thickness direction of the electronic device.

2 . The electronic device of claim 1 , wherein an area of the light receiving layer is greater than an area of the light emitting layer in a plan view.

3 . The electronic device of claim 1 , wherein the light receiving layer does not overlap the light emitting layer in a plan view.

4 . The electronic device of claim 1 , wherein the light receiving layer is disposed between the electron transport region and the second electrode.

5 . The electronic device of claim 1 , wherein the electron transport region comprises an electron transport layer and an electron injection layer disposed between the electron transport layer and the second electrode, and
the light receiving layer is disposed between the electron transport layer and the electron injection layer or between the electron injection layer and the second electrode.

6 . The electronic device of claim 1 , wherein the electron transport region comprises a hole blocking layer, an electron transport layer disposed between the hole blocking layer and the second electrode, and an electron injection layer disposed between the electron transport layer and the second electrode, and
the light receiving layer is disposed between the hole blocking layer and the electron transport layer, between the electron transport layer and the electron injection layer or between the electron injection layer and the second electrode.

7 . The electronic device of claim 1 , wherein the light receiving layer is disposed between the hole transport region and the first electrode.

8 . The electronic device of claim 1 , wherein the hole transport region comprises a hole transport layer and a hole injection layer disposed between the hole transport layer and the first electrode, and
the light receiving layer is disposed between the first electrode and the hole injection layer or between the hole injection layer and the hole transport layer.

9 . The electronic device of claim 1 , wherein the hole transport region comprises an electron blocking layer, a hole transport layer disposed between the electron blocking layer and the first electrode, and a hole injection layer disposed between the hole transport layer and the first electrode, and
the light receiving layer is disposed between the first electrode and the hole injection layer, between the hole injection layer and the hole transport layer, or between the hole transport layer and the electron blocking layer.

10 . An electronic device, comprising:
a base layer; a first electrode disposed on the base layer and comprising a light emitting electrode and a light receiving electrode which are spaced apart from each other; a pixel defining layer which is disposed on the base layer, wherein the pixel defining layer includes a first opening to expose the light emitting electrode and a second opening to expose the light receiving electrode; a second electrode disposed on the first electrode; a hole transport region disposed between the first electrode and the second electrode; an electron transport region disposed between the hole transport region and the second electrode; a light emitting layer which overlaps the light emitting electrode and is disposed between the hole transport region and the electron transport region; and a light receiving layer which is provided between the light receiving electrode and the second electrode and disposed in a layer different from the light emitting layer.

11 . The electronic device of claim 10 , wherein an area of the second opening is greater than an area of the first opening in a plan view.

12 . The electronic device of claim 11 , wherein an area of the light receiving layer is greater than an area of the light emitting layer in the plan view.

13 . The electronic device of claim 10 , wherein the light receiving layer is disposed between the light receiving electrode and the hole transport region or between the electron transport region and the second electrode.

14 . The electronic device of claim 10 , wherein the hole transport region comprises a hole transport layer and a hole injection layer disposed between the hole transport layer and the first electrode, and
the electron transport region comprises an electron transport layer and an electron injection layer disposed between the electron transport layer and the second electrode, wherein the light receiving layer is disposed between the light receiving electrode and the hole injection layer, between the hole injection layer and the hole transport layer, between the electron transport layer and the electron injection layer, or between the electron injection layer and the second electrode.

15 . The electronic device of claim 10 , wherein the hole transport region comprises an electron blocking layer, a hole transport layer disposed between the electron blocking layer and the light receiving electrode, and a hole injection layer disposed between the hole transport layer and the light receiving electrode, and
the electron transport region comprises a hole blocking layer, an electron transport layer disposed between the hole blocking layer and the second electrode, and an electron injection layer disposed between the electron transport layer and the second electrode, wherein the light receiving layer is disposed between the light receiving electrode and the hole injection layer, between the hole injection layer and the hole transport layer, between the hole transport layer and the electron blocking layer, between the hole blocking layer and the electron transport layer, between the electron transport layer and the electron injection layer, or between the electron injection layer and the second electrode.

16 . An electronic device including a first light emitting region, a second light emitting region, a third light emitting region, and a light receiving region which are spaced apart from each other in a plan view, the electronic device comprising:
a base layer; a display element layer comprising a pixel defining layer, which is disposed on the base layer and has an opening, and first, second and third light emitting elements and a light receiving element, which are separated by the pixel defining layer; and an input sensing layer disposed on the display element layer, wherein each of the first, second and third light emitting elements and the light receiving element comprises: a first electrode; a hole transport region disposed on the first el

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Junyong
• Yoon Seokgyu
• Seo Dongkyu
• Lee Daeho
• Lee Byungseok
• Jung Jin-Soo
• Choi Minsoo
• Choi Youngeun

Classifications

• G06V10/17

  using hand-held instruments · CPC title

• G06V40/1318 Primary

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title

• H10K50/805

  Electrodes · CPC title