Display device

Patent metadata

Field	Value
Publication number	US-2019348482-A1
Application number	US-201816217547-A
Country	US
Kind code	A1
Filing date	Dec 12, 2018
Priority date	May 14, 2018
Publication date	Nov 14, 2019
Grant date	—

Abstract

Provided is a display device including an organic insulating layer; a pixel electrode on the organic insulating layer; a pixel defining layer configured to cover an edge of the pixel electrode, having an opening corresponding to the pixel electrode, the pixel defining layer including a first layer including an inorganic insulating material and a second layer having less light transmittance in a first wavelength band than the first layer; an intermediate layer on a portion of the pixel electrode exposed via the opening, and including an emission layer; and an opposite electrode on the intermediate layer.

First claim

What is claimed is:

1 . A display device, comprising:
an organic insulating layer; a pixel electrode on the organic insulating layer; a pixel defining layer that covers an edge of the pixel electrode, the pixel defining layer having an opening corresponding to the pixel electrode, and the pixel defining layer including a first layer including an inorganic insulating material and a second layer having less light transmittance in a first wavelength band than the first layer; an intermediate layer on a portion of the pixel electrode exposed via the opening, the intermediate layer including an emission layer; and an opposite electrode on the intermediate layer.

2 . The display device as claimed in claim 1 , wherein the first wavelength band is in a range of 10 nm to 400 nm.

3 . The display device as claimed in claim 1 , wherein the light transmittance of the second layer in the first wavelength band is 2% or less.

4 . The display device as claimed in claim 1 , wherein:
the pixel electrode is a first pixel electrode, and the display device further includes a second pixel electrode neighboring the first pixel electrode, and a portion of the organic insulating layer exposed between the first pixel electrode and the second pixel electrode is entirely covered by the second layer.

5 . The display device as claimed in claim 1 , wherein the first layer includes at least one of silicon oxide and silicon nitride.

6 . The display device as claimed in claim 1 , wherein the second layer includes amorphous silicon.

7 . The display device as claimed in claim 6 , wherein the second layer includes an amorphous silicon layer having a thickness that is 1,000 Å or greater.

8 . The display device as claimed in claim 1 , wherein the second layer includes an amorphous carbon-based material that absorbs light in the first wavelength band, the amorphous carbon-based material excluding diamond-like carbon (DLC).

9 . The display device as claimed in claim 1 , wherein:
the first layer is between the organic insulating layer and the second layer, and a portion of the first layer directly contacts the organic insulating layer.

10 . The display device as claimed in claim 1 , further comprising a third layer on the second layer, the third layer including an inorganic insulating material,
wherein the second layer is between the first layer and the third layer.

11 . The display device as claimed in claim 1 , wherein:
the second layer includes a first sub-layer and a second sub-layer, and a sub-layer closer to the organic insulating layer from among the first sub-layer and the second sub-layer has a larger light absorption rate than the other sub-layer.

12 . A display device, comprising:
a substrate; a thin-film transistor on the substrate; an organic insulating layer that covers the thin-film transistor; a pixel electrode electrically connected to the thin-film transistor via a contact hole of the organic insulating layer; a pixel defining layer that covers an edge of the pixel electrode, the pixel defining layer having an opening corresponding to the pixel electrode, and the pixel defining layer including a first layer and a second layer, the second layer having less light transmittance in a first wavelength band than the first layer; a spacer on the pixel defining layer; an intermediate layer on a portion of the pixel electrode exposed via the opening, the intermediate layer including an emission layer; and an opposite electrode on the intermediate layer.

13 . The display device as claimed in claim 12 , wherein:
the pixel electrode is a first pixel electrode, and the display device further includes a second pixel electrode, wherein a portion of the organic insulating layer exposed between the first pixel electrode and the second pixel electrode is entirely covered by the second layer.

14 . The display device as claimed in claim 12 , wherein the first wavelength band is in a range of 10 nm to 400 nm.

15 . The display device as claimed in claim 14 , wherein the light transmittance of the second layer in the first wavelength band is 2% or less.

16 . The display device as claimed in claim 12 , further comprising a third layer that covers the second layer, the second layer being between the first layer and the third layer.

17 . The display device as claimed in claim 16 , wherein the first layer and the third layer include an inorganic insulating material having greater light transmittance in the first wavelength band than the second layer.

18 . The display device as claimed in claim 12 , wherein a portion of the first layer directly contacts the organic insulating layer.

19 . The display device as claimed in claim 12 , wherein the second layer includes at least one of amorphous silicon and an amorphous carbon-based material, excluding diamond-like carbon (DLC).

20 . The display device as claimed in claim 12 , wherein:
the second layer includes a first sub-layer and a second sub-layer, and a sub-layer closer to the organic insulating layer from among the first sub-layer and the second sub-layer has a larger light absorption rate than the other sub-layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Chulmin
• Kim Changok
• Han Jihye

Classifications

• H01L51/5218

  Electricity · mapped topic

• H01L2251/301

  Electricity · mapped topic

• H01L2251/558

  Electricity · mapped topic

• H01L2251/303

  Electricity · mapped topic

• H01L27/3248

  Electricity · mapped topic