Display Device

• US 10,658,617 B2
• Filed: 06/06/2019
• Issued: 05/19/2020
• Est. Priority Date: 10/14/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kajiyama, Kenta
• Primary Examiner(s): Landau, Matthew C
• Assistant Examiner(s): Rampersaud, Priya M
• Application Number:
  US16/433,249
• Publication Number:
  US 20190288238A1
• Time in Patent Office: 348 Days
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0281 Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A display device in an embodiment according to the present invention includes a substrate including a first surface and a second surface opposing the first surface, a display area on the first surface of the substrate and including a plurality of pixels, a periphery area on an outer side of the display area of the first surface, and a sealing layer covering the display area and the periphery area. The periphery area includes a drive circuit outputting a signal to the display area, an input terminal part input with a signal for driving the drive circuit, and a plurality of wirings arranged between the drive circuit and the input terminal part, and the sealing layer includes at least one opening part exposing the first surface of the substrate in an area inside a corner part of the substrate in the periphery area.

Claims

1. A display device comprising:

a substrate having flexibility and including a first surface and a second surface opposing the first surface, and an outer edge;

a display area on the first surface of the substrate and including a plurality of pixels;

a periphery area on an outer side of the display area on the first surface; and

a sealing layer covering the display area and the periphery area, wherein

the display area and the periphery area comprise a first elements layer and a second elements layer, wherein, within the display area, the first elements layer includes a first plurality of transistors and the second elements layer includes a plurality of light emitting elements and one or more insulating layers, and within the periphery area, the first elements layer includes a second plurality of transistors and the second elements layer includes at least one or the one or more insulating layers, and the second elements layer is arranged on the first elements layer,

a groove passes through the first and second elements layers between the display area and the periphery area,

the sealing layer includes a first part that covers the first and second elements layers and a second part that runs through the groove and covers opposing edges of the first and second elements layers formed by the groove,

the periphery area includes a wiring part, wherein the first elements layer, the second elements layer and the sealing layer are arranged, the periphery area includes first opening part through the first and second elements layers, and the periphery area includes a second opening which penetrates the substrate and is arranged directly below the first opening part, and

a part of the wiring part, the first opening part, the second part of the sealing layer and the display area are arranged in a sequential order from the outer edge of the substrate.

2. The display device according to claim 1, wherein at least a first part of the wiring part is arranged between a corner part of the substrate and the first opening part.

3. The display device according to claim 2, wherein at least a second part of the wiring part is arranged between the first opening part and the display area.

4. The display device according to claim 1, wherein the first opening part comprises a plurality of opening parts, the substrate includes a plurality of corner parts, and the plurality of opening parts are respectively arranged corresponding to the plurality of corner parts of the substrate.

5. The display device according to claim 1, wherein the substrate includes a first curved part along a first side of the substrate and a second curved part along a second side different from the first side of the substrate, and the first opening part overlaps an intersection part between the first curved part and the second curved part.

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

a support member on the second surface of the substrate, wherein

the support member includes a first notch part along a first side of the substrate and a second notch part along a second side intersecting the first side of the substrate, and

the first opening part is arranged in an area where the first notch part and the second notch part intersect.

7. The display device according to claim 1, wherein:

within the display area, the sealing layer includes a first inorganic insulating layer, a second inorganic insulating layer, and an organic insulating layer between the first inorganic insulating layer and the second inorganic insulating layer;

within the display area and the periphery area, the first elements layer includes a plurality of inorganic insulating layers comprising an inorganic insulating material, a plurality of conducting layers comprising a conducting material, and a planarization layer comprising an organic insulating material on the plurality of inorganic insulating layers;

within the display area, the second elements layer includes an anode, a bank layer comprising an organic insulating material, an organic layer comprising an organic electroluminescent material, and a cathode;

the first opening part includes a first opening provided in the plurality of inorganic insulating layers and the plurality of conducting layers, a second opening provided in the planarization layer, and a third opening provided in the bank layer; and

a width of the first opening is smaller than a width of the second opening and the width of the first opening is smaller than a width of the third opening.

8. The display device according to claim 7, wherein:

the first opening part comprises a plurality of opening parts;

the sealing layer includes a region surrounding the plurality of opening parts and a region where the first inorganic insulating layer and the second inorganic insulating layer are in contact with each other in the groove, and the second part of the sealing layer surrounds the display area.

9. The display device according to claim 8, wherein the periphery area includes a drive circuit configured to output a video signal to the display area and a video signal line extending from the drive circuit to the display area, and two of the plurality of openings are arranged to sandwich the video signal line.

10. A display device comprising:

a substrate including a first surface and a second surface opposing the first surface;

a display area on the first surface of the substrate, the display area including a plurality of pixels;

a periphery area on the first surface of the substrate, the periphery area arranged at an outer side of the display area; and

a sealing layer covering the display area and the periphery area, wherein

the periphery area includes a drive circuit configured to output a signal to the display area,

an input terminal part configured for input of a signal for driving the drive circuit, and a plurality of wirings arranged between the drive circuit and the input terminal part, and

the sealing layer includes a plurality of first opening parts through the sealing layer,

the substrate includes a plurality of second opening parts which penetrate the substrate and are arranged directly below the plurality of the first opening parts, and

the display area has a plurality of corner parts, and the plurality of the first opening parts are respectively arranged corresponding to the plurality of corner parts of the display area.

11. The display device according to claim 10, wherein the substrate is flexible.

12. The display device according to claim 10, wherein at least a part of the plurality of wirings is arranged between a corner part of the substrate and at least one of the plurality of the first opening parts.

13. The display device according to claim 12, wherein at least a part of the plurality of wirings is arranged between at least one of the plurality of the first opening parts and at least one of the plurality of corner parts of the display area.

14. The display device according to claim 10, wherein the substrate has a plurality of corner parts, and the plurality of the first opening parts are respectively arranged corresponding to the plurality of corner parts of the substrate.

15. The display device according to claim 10, wherein the substrate includes a first curved part along a first side of the substrate and a second curved part along a second side of the substrate different from the first side of the substrate, and at least one of the plurality of the first opening parts overlaps an intersection part between the first curved part and the second curved part.

16. The display device according to claim 10, wherein the sealing layer includes a first inorganic insulating layer and a second inorganic insulating layer.

17. The display device according to claim 16, wherein:

each of the plurality of pixels includes a first transistor and a light emitting element electrically connected to the first transistor;

the drive circuit includes a second transistor and a third transistor;

the display area and the periphery area include at least a first insulating layer arranged on the first surface of the substrate, a second insulating layer as a gate insulating layer of the first transistor, the second transistor and the third transistor, and a third insulating layer arranged between the first transistor and the light emitting element; and

each of the plurality of the first opening parts includes a first through hole through a first stacked layer body including the second insulating layer and the third insulating layer, and a second through hole through a second stacked layer body including at least the first insulating layer and the second insulating layer, and an opening end of the second through hole is arranged on an inner side of an opening end of the first through hole.

18. The display device according to claim 10, further comprising:

a support member on the second surface of the substrate;

wherein

the support member includes a first notch part along a first side of the substrate and a second notch part along a second side intersecting the first side of the substrate, and

each of the plurality of the first opening parts is arranged in an area where the first notch part and the second notch part intersect.