DISPLAY DEVICE

• US 20180337365A1
• Filed: 05/03/2018
• Published: 11/22/2018
• Est. Priority Date: 05/16/2017
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: HARADA, Keisuke
• Granted Patent: US 10,446,791 B2
• Time in Patent Office: Days
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A display device according to an embodiment of the present invention includes a display panel which has a display area having a pixel array part including a plurality of pixels, a frame area arranged on an outer peripheral side of the display area, and a driving part formation area having a driving part which drives the pixel array part. The display panel includes: a substrate; an organic light-emitting diode; an organic insulating film which is provided in the display area and the frame area, and has an opening in a light-emitting area of the organic light-emitting diode; and a first inorganic insulating film formed on an upper surface of the organic insulating film in the frame area. The organic insulating film includes a plurality of pieces of organic insulating film which are divided in the frame area.

Claims

1. A display device comprising:

a display panel which has a display area having a pixel array part including a plurality of pixels, a frame area arranged on an outer peripheral side of the display area, and a driving part formation area having a driving part which drives the pixel array part, wherein

the display panel comprises;

a substrate;

an organic light-emitting diode including a lower electrode provided for each pixel over the substrate, an organic EL layer provided over the lower electrode, and an upper electrode provided over the organic EL layer;

an organic insulating film which is provided in the display area and the frame area, and has an opening in a light-emitting area of the organic light-emitting diode; and

a first inorganic insulating film formed on an upper surface of the organic insulating film in the frame area, and

the organic insulating film includes a plurality of pieces of organic insulating film which are divided in the frame area.

2. The display device according to claim 1, wherein

the organic insulating film includes, in the frame area, the plurality of pieces of organic insulating film which extend from a side of the display area to a side of an edge of the frame area.

3. The display device according to claim 1, wherein

the organic insulating film comprises the plurality of pieces of organic insulating film which extend, in the frame area, to run along a border between the display area and the frame area.

4. The display device according to claim 1, wherein

the organic insulating film comprises the plurality of pieces of organic insulating film which are divided, in the frame area, in a direction from a side of the display area to a side of an edge of the frame area, and in a direction along a border between the display area and the frame area.

5. The display device according to claim 1, further comprising:

a planarizing film provided over the substrate; and

a second inorganic insulating film provided over the planarizing film and under the organic insulating film, wherein

in the frame area, the second inorganic insulating film has a plurality of openings.

6. The display device according to claim 5, wherein

in the frame area, at least a part of the pieces of organic insulating film fills up the opening.

7. The display device according to claim 6, wherein

the organic insulating film comprises:

the pieces of organic insulating film which fill up the openings; and

the piece of organic insulating film which does not fill up the openings, wherein

the piece of organic insulating film which does not fill up the openings is interposed between the plurality of pieces of organic insulating film which fill up the openings.

8. The display device according to claim 5, wherein

between the plurality of pieces of organic insulating film in the frame area, a lower surface of the upper electrode and an upper surface of a conductive film provided over the second inorganic insulating film are electrically connected.

9. The display device according to claim 8, wherein

there is a contact region where the lower surface of the upper electrode and the upper surface of the conductive film are electrically connected, and

the contact region on a side distant from the driving part formation area is larger than the contact region on a side close to the driving part formation area.

10. The display device according to claim 8, wherein

widths of the pieces of organic insulating film on a side distant from the driving part formation area are narrower than widths of the pieces of organic insulating film on a side close to the driving part formation area.

11. The display device according to claim 8, wherein

arrangement intervals of the plurality of pieces of organic insulating film on a side distant from the driving part formation area are wider than arrangement intervals of the plurality of pieces of organic insulating film on a side close to the driving part formation area.

12. The display device according to claim 8, wherein

the lower electrode and the conductive film are formed of a same material.

13. The display device according to claim 1, wherein

a size of a formation area of the organic insulating film in the frame area is 80% or less of a total size of the frame area.

14. The display device according to claim 1, wherein

a size of a formation area of the organic insulating film in the frame area is 65% or less of a total size of the frame area.

15. The display device according to claim 1, wherein

a size of a formation area of the organic insulating film in the frame area is 30% or more of a total size of the frame area.