Display device including an optical pattern layer

Patent metadata

Field	Value
Publication number	US-11744135-B2
Application number	US-202017108557-A
Country	US
Kind code	B2
Filing date	Dec 1, 2020
Priority date	Dec 3, 2019
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A display device includes: a substrate; a first display pixel disposed on the substrate and including a light emitting element; a first sensor pixel disposed on the substrate and including an optical sensor; a first bank disposed on the substrate, wherein the first display pixel is disposed in the first bank; a first light blocking layer overlapping the first bank; a first color filter disposed on the first light blocking layer and overlapping the light emitting element; and an optical pattern layer disposed on the optical sensor, wherein the optical pattern layer includes a light blocking portion and a plurality of light transmitting portions passing through the light blocking portion.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a first display pixel disposed on the substrate and including a light emitting element;
a first sensor pixel disposed on the substrate and including an optical sensor;
a first bank disposed on the substrate, wherein the first display pixel is disposed in the first bank;
a first light blocking layer overlapping the first bank;
a first color filter disposed on the first light blocking layer and overlapping the light emitting element; and
an optical pattern layer disposed on the optical sensor,
wherein the optical pattern layer includes a light blocking portion and a plurality of light transmitting portions passing through the light blocking portion, wherein the light emitting element includes a first pixel electrode and a light emitting layer disposed on the first pixel electrode,
the optical sensor includes a second pixel electrode and a light receiving layer disposed on the second pixel electrode, and
the first pixel electrode and the second pixel electrode are formed from the same conductive layer.

2. The display device according to claim 1 , further comprising:
a common electrode disposed on the light receiving layer and the light emitting layer.

3. The display device according to claim 2 , further comprising:
a first source electrode and a first drain electrode, wherein the first source electrode or the first drain electrode is electrically connected to the first pixel electrode; and
a second source electrode and a second drain electrode, wherein the second source electrode or the second drain electrode is electrically connected to the second pixel electrode,
wherein the first source electrode, the first drain electrode, the second source electrode, and the second drain electrode are formed from the same conductive layer.

4. The display device according to claim 1 , wherein the light blocking portion and the first light blocking layer are formed of the same material.

5. The display device according to claim 1 , further comprising:
a second bank disposed on the substrate, wherein the first sensor pixel is disposed in the second bank,
wherein the first bank and the second bank are formed of the same material.

6. The display device according to claim 5 , further comprising:
a second light blocking layer overlapping the second bank,
wherein the first light blocking layer and the second light blocking layer are formed of the same material.

7. The display device according to claim 1 , further comprising:
a thin film encapsulation layer disposed on the light emitting element and the optical sensor;
a cover window disposed on the thin film encapsulation layer; and
a touch sensing layer disposed between the thin film encapsulation layer and the cover window.

8. The display device according to claim 1 , wherein the substrate comprises:
a folding area;
a first non-folding area positioned at one side of the folding area; and
a second non-folding area positioned at another side of the folding area.

9. The display device according to claim 1 , wherein the optical sensor includes a photo transistor or a photo diode.

10. The display device according to claim 1 , further comprising:
a second color filter disposed between the optical sensor and the optical pattern layer.

11. The display device according to claim 10 , further comprising:
a planarization layer disposed on the optical pattern layer,
wherein the planarization layer is disposed on an inner wall of the light blocking portion through the plurality of light transmitting portions.

12. The display device according to claim 11 , wherein the planarization layer is in contact with the second color filter through the plurality of light transmitting portions.

13. A display device comprising:
a substrate;
a first display pixel disposed on the substrate and including a light emitting element;
a first sensor pixel disposed on the substrate and including an optical sensor;
a first bank disposed on the substrate, wherein the first display pixel is disposed in the first bank;
a first light blocking layer overlapping the first bank;
a first color filter disposed on the first light blocking layer and overlapping the light emitting element; and
an optical pattern layer disposed on the optical sensor,
wherein the optical pattern layer includes a light blocking portion and a plurality of light transmitting portions passing through the light blocking portion, wherein the display device further comprises a second color filter disposed on the optical pattern layer and overlapping the optical sensor.

14. The display device according to claim 13 , wherein the second color filter is disposed on an inner wall of the light blocking portion through the plurality of light transmitting portions.

15. The display device according to claim 13 , further comprising:
a planarization layer covering the first color filter and the second color filter.

16. The display device according to claim 13 , further comprising:
a plurality of first transmission patterns disposed on the light emitting element.

17. The display device according to claim 16 , wherein the first color filter is disposed on an upper surface and a side surface of the first transmission pattern.

18. The display device according to claim 16 , further comprising:
a second transmission pattern disposed in the plurality of light transmitting portions of the optical pattern layer,
wherein the second transmission pattern is formed of the same material as the first transmission pattern.

19. The display device according to claim 18 , wherein the second color filter is disposed on the second transmission pattern and an upper surface of the light blocking portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Lim Jae Ik
• Lee Dae Young
• Choi Chaun Gi

Classifications

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• G06V40/1365

  Matching; Classification · CPC title

• H10K59/65 Primary

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title