Electroluminescent display including photo tunable adhesive

Patent metadata

Field	Value
Publication number	US-11758762-B2
Application number	US-202017125997-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Dec 20, 2019
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

An electroluminescent display includes a display panel including a plurality of pixels, each pixel having an emission area and non-emission area; and a protective film attached on one surface of the display panel using a photo tunable adhesive, wherein the photo tunable adhesive includes: a light transmitting area corresponding to the emission area; and a light blocking area corresponding to the non-emission area.

First claim

What is claimed is:

1. An electroluminescent display, comprising:
a display panel including a plurality of pixels, each pixel having an emission area and non-emission area; and
a protective film attached on one surface of the display panel by a photo tunable adhesive,
wherein the photo tunable adhesive includes:
a light transmitting area corresponding to the emission area; and
a light blocking area corresponding to the non-emission area.

2. The electroluminescent display according to claim 1 , wherein the light transmitting area has a light transmittance rate of 90% or more, and the light blocking area has a light absorption rate of 95% or more.

3. The electroluminescent display according to claim 1 , wherein the light blocking area is selectively defined by irradiating the ultra-violet lights.

4. The electroluminescent display according to claim 1 , wherein the display panel includes:
a substrate where the plurality of pixels is defined;
a display layer having a thin film transistor and a light emitting element disposed in each pixel on the substrate; and
an encapsulation layer covering the display layer.

5. The electroluminescent display according to claim 4 , wherein the photo tunable adhesive is disposed on a top surface of the encapsulation layer; and
wherein the protective film is attached onto the photo tunable adhesive.

6. The electroluminescent display according to claim 4 , wherein the photo tunable adhesive is disposed onto the bottom surface of substrate; and
wherein the protective film is attached onto the photo tunable adhesive.

7. The electroluminescent display according to claim 4 , further comprising a cover plate attached onto the encapsulation layer with the photo tunable adhesive,
wherein the photo tunable adhesive is disposed on a top surface of the cover plate, and
wherein the protective film is attached on the photo tunable adhesive.

8. The electroluminescent display according to claim 1 , wherein the protective film includes a ultra-violet light blocking film.

9. The electroluminescent display according to claim 1 , wherein the protective film includes a ultra-violet protection coating layer and a scratch-preventing coating layer sequentially stacked on a surface of the substrate.

10. The electroluminescent display according to claim 9 , wherein the protective film further includes an ambient reflection prevention coating layer.

11. The electroluminescent display according to claim 1 , wherein the display panel further includes:
a display area defined at a middle area of the display panel; and
a non-display area defined at a circumference surrounding the display area,
wherein the light blocking area of the photo tunable adhesive corresponds to the non-emission area.

12. An electroluminescent display, comprising:
a display panel where a display area and a non-display area are defined;
a plurality of pixels disposed in the display panel and including an emission area and a non-emission area;
a protective film disposed on the display panel;
a photo tunable adhesive attaching the protective film to the display panel and including a light transmitting area corresponding to the emission area and a light blocking area corresponding to the non-emission area,
wherein the light blocking area is extended from the non-display area to the non-emission area of the display area.

13. The electroluminescent display according to claim 12 , further comprising a cover plate attached onto the encapsulation layer with the photo tunable adhesive disposed on a top surface of the cover plate.

14. The electroluminescent display according to claim 12 , wherein the protective film includes a ultra-violet light blocking film.

15. The electroluminescent display according to claim 12 , wherein the protective film includes a ultra-violet protection coating layer and a scratch-preventing coating layer sequentially stacked on a surface of the substrate.

16. The electroluminescent display according to claim 15 , wherein the protective film further includes an ambient reflection prevention coating layer.

17. The electroluminescent display according to claim 12 , wherein the photo tunable adhesive includes an optical adhesive material and a photochromic dye material.

Assignees

• Lg Display Co Ltd

Inventors

• Noh Hyunjong
• Min Kyungsuk
• Jung Jinhyung
• Ko Taewoon
• Kim Youngwook

Classifications

• H10K59/8792

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

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• H10K50/865

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

• H10K59/8722 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title