Display device including a light blocking layer over a pixel defining layer

Patent metadata

Field	Value
Publication number	US-11158699-B2
Application number	US-202016930586-A
Country	US
Kind code	B2
Filing date	Jul 16, 2020
Priority date	Jul 19, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A display device including a substrate that includes a circuit layer; an insulating layer on the substrate; a pixel defining layer on the insulating layer, the pixel defining layer having an opening exposing a region of a top surface of the insulating layer; a light blocking layer covering a top surface and a side surface of the pixel defining layer; and an organic electroluminescent element in the opening, wherein the organic electroluminescent element includes a first electrode on the region of the top surface of the insulating layer exposed through the opening; at least one organic layer on the first electrode; and a second electrode on the at least one organic layer.

First claim

What is claimed is:

1. A display device, comprising:
an insulating layer;
a first electrode on the insulating layer;
a pixel defining layer on the insulating layer, the pixel defining layer having an opening exposing a region of a top surface of the first electrode;
a light blocking layer that covers at least one of a top surface of the pixel defining layer and a side surface of the pixel defining layer that is exposed through the opening;
at least one organic layer in the opening and on the first electrode;
a second electrode on the at least one organic layer and the pixel defining layer;
an encapsulating layer on the second electrode, and the encapsulating layer overlaps the at least one organic layer and the pixel defining layer;
an input sensor on the encapsulating layer; and
an optical member on the input sensor,
wherein the pixel defining layer overlaps an edge of the first electrode not exposed in the opening.

2. The display device as claimed in claim 1 ,
wherein the optical member is a polarizing member or a color filter member.

3. The display device as claimed in claim 1 , wherein the optical member includes an ultraviolet light absorbent that absorbs light of a wavelength band ranging from 350 nm to 400 nm.

4. The display device as claimed in claim 2 , wherein the optical member is the polarizing member, and the polarizing member includes a second light absorbent that absorbs light of a wavelength band ranging from 350 nm to 400 nm.

5. The display device as claimed in claim 2 , wherein the optical member is the color filter member, and the color filter member includes a third light absorbent that absorbs light of a wavelength band ranging from 350 nm to 400 nm.

6. The display device as claimed in claim 1 , wherein the light blocking layer is directly on the top surface and the side surface of the pixel defining layer.

7. The display device as claimed in claim 1 , wherein the light blocking layer includes at least one light absorbent that absorbs light of a wavelength band ranging from 350 nm to 450 nm.

8. The display device as claimed in claim 1 , wherein the light blocking layer absorbs light of a wavelength band ranging from 350 nm to 450 nm.

9. The display device as claimed in claim 1 ,
wherein the encapsulating layer includes a first light absorbent that absorbs light of a wavelength band ranging from 350 nm to 400 nm.

10. The display device as claimed in claim 1 , wherein the input sensor is directly on the encapsulating layer.

11. The display device as claimed in claim 1 , wherein the light blocking layer comprises at least one of a benzotriazole-based light absorbent, a benzophenone-based light absorbent, a salicylic acid-based light absorbent, a salicylate-based light absorbent, a cyanoacrylate-based light absorbent, a cinnamate-based light absorbent, an oxanilide-based light absorbent, a polystyrene-based light absorbent, a polyferrocenylsilane-based light absorbent, a methine-based light absorbent, an azomethine-based light absorbent, a triazine-based light absorbent, a para-amino benzoic-acid-based light absorbent, a cinnamic acid-based light absorbent, or an urocanic acid-based light absorbent.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Byung-Chul
• Kim Sujeong
• Yeon Kiyoung
• Joo Sun-Kyu
• Huh Chul
• Kim Inok
• Mun Hyeran
• Song Inseok
• Lee Wooyoung
• Lee Yui-Ku

Classifications

• H10K59/122

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

• H10K59/8792 Primary

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

• H10K59/126

  Shielding, e.g. light-blocking means over the TFTs · CPC title

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10D86/451

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title