Display device

Patent metadata

Field	Value
Publication number	US-10644257-B2
Application number	US-201816113478-A
Country	US
Kind code	B2
Filing date	Aug 27, 2018
Priority date	Jan 16, 2015
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A display device is provided including a display region arranged with a plurality of pixels, and a first sealing region arranged in an exterior periphery part of the display region, the display region includes an individual pixel electrode arranged in each of the plurality of pixels, a common pixel electrode arranged in upper layer of the individual pixel electrode and in succession to the plurality of pixels, and a light emitting layer arranged between the individual pixel electrode and the common pixel electrode, and the first sealing region includes a sealing layer arranged on a lower layer than the common pixel electrode and a region stacked with the common pixel electrode extending from the display region, the stacked region being enclosed by the display region.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a TFT layer arranged on the first substrate and including thin film transistors and laminated inorganic insulation films;
a first organic insulation layer on the TFT layer;
an anode layer arranged on the first organic insulation layer and including anode electrodes and a first conductive film;
a second organic insulation layer arranged on the anode layer and including openings arranged in a matrix form;
an organic light-emitting layer on the second organic insulation layer;
a cathode layer arranged on the organic light-emitting layer and including a transparent inorganic conductive material; and
a sealing material on the first substrate, wherein
the first substrate has first to fourth sides and first to fifth regions in a plan view,
the first region includes pixels arranged in a matrix form,
the second region surrounds the first region,
the third region surrounds the first region,
the fourth region surrounds the second region,
the fifth region is arranged between the fourth side and the fourth region and provided with an IC driver and external terminals connected to a wiring board on the first substrate,
a first recess surrounding the pixels is formed in the first organic insulation layer and the second organic insulation layer in the second region,
a second recess surrounding the pixels is formed in the second organic insulation layer in the third region,
a third recess surrounding the pixels is formed in the second organic insulation layer in the fourth region, and
the sealing material is formed in the third recess and surrounds the third region, and
the cathode layer is connected to the first conductive film through the second recess.

2. The display device according to claim 1 , wherein
one of the pixels includes a light-emitting element and a corresponding one of the thin film transistors, and
the light-emitting element is composed of a corresponding one of the anode electrodes, a corresponding one region of the organic light-emitting layer, and a corresponding one region of the cathode layer which overlaps a corresponding one of the openings.

3. The display device according to claim 1 , wherein
the first recess exposes an underlying layer of the first organic insulation layer, and
the second recess exposes an underlying layer of the second organic insulation layer.

4. The display device according to claim 1 , wherein
the laminated inorganic insulation films, the first organic insulation layer, and the second organic insulation layer are arranged in the first, second, and third regions.

5. A display device comprising:
a first substrate;
a TFT layer arranged on the first substrate and including thin film transistors and laminated inorganic insulation films;
a first organic insulation layer on the TFT layer;
an anode layer arranged on the first organic insulation layer and including anode electrodes and a first conductive film;
a second organic insulation layer arranged on the anode layer and including openings arranged in a matrix form;
an organic light-emitting layer on the second organic insulation layer; and
a cathode layer arranged on the organic light-emitting layer and including a transparent inorganic conductive material, wherein
the first substrate has first to fourth sides and first to fourth regions in a plan view,
the first region includes pixels arranged in a matrix form,
the second region is arranged outside the first region,
the third region is arranged between the first region and the second region and surrounds the first region,
the fourth region is arranged between the fourth side and the third region and provided with an IC driver and external terminals connected to a wiring board on the first substrate,
a first recess is formed in the first organic insulation layer and the second organic insulation layer in the second region,
a second recess surrounding the first region is formed in the second organic insulation layer in the third region,
a third recess surrounding the first region is formed in the first organic insulation layer in the second region, and
a first part of the second organic insulation layer is arranged in the third recess so that a first side surface of the first recess is covered by the first part of the second organic insulation layer, and
the cathode layer is connected to the first conductive film through the second recess.

6. The display device according to claim 5 , wherein
one of the pixels includes a light-emitting element and a corresponding one of the thin film transistors, and
the light-emitting is composed of a corresponding one of the anode electrodes, a corresponding one region of the organic light-emitting layer, and a corresponding one region of the cathode layer which overlaps a corresponding one of the openings.

7. The display device according to claim 5 , wherein
the first recess exposes an underlying layer of the first organic insulation layer, and
the second recess exposes an underlying layer of the second organic insulation layer.

8. The display device according to claim 5 , wherein
the laminated inorganic insulation films, the first organic insulation layer, and the second organic insulation layer are arranged in the first, second, and third regions.

9. The display device according to claim 5 , wherein
a first inorganic conductive layer is arranged along a side surface and a bottom surface of the third recess, and
the first part of the second organic insulation layer is arranged between the first inorganic conductive layer and the first recess so that a side surface of the first part of the second organic insulation layer is covered by the cathode layer.

10. A display device comprising:
a first substrate;
a TFT layer arranged on the first substrate and including thin film transistors, a wiring, and laminated inorganic insulation films;
a first organic insulation layer on the TFT layer;
an anode layer arranged on the first organic insulation layer and including anode electrodes and a first conductive film;
a second organic insulation layer arranged on the anode layer and including openings arranged in a matrix form;
an organic light-emitting layer on the second organic insulation layer; and
a cathode layer arranged on the organic light-emitting layer and including a transparent inorganic conductive material, wherein
the first substrate has first to fourth sides and first to fourth regions in a plan view,
the first region includes pixels arranged in a matrix form,
the second region is arranged outside the first region,
the third region surrounds the first region,
the fourth region is arranged between the fourth side and the third region and includes an IC driver and external terminals connected to a wiring board on the first substrate,
a first recess is formed in the first organic insulation layer and the second organic insulation layer in the second region,
a second recess surrounding the first region is formed in the second organic insulation layer in the third region,
a third recess surrounding the first region is formed in the first organic insulation layer in the second region,
the cathode layer is connected to the first conductive film through the second recess, and the first conductive film is connected to the wiring, and
a first part of the second organic insulation layer is arranged in the third recess so that a first side surface of the first recess is covered by the first part of the second organic insulation layer.

11. The display device according to claim 10 , wherein
one of the pixels includes a light-emitting element and a corresponding one of the thin

Assignees

• Japan Display Inc

Inventors

• Hanari Jun

Classifications

• H01L51/5243 Primary

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L51/5212

  Electricity · mapped topic

• H01L51/5246

  Electricity · mapped topic

• H10K59/8722 Primary

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