Display device

• US 10,644,094 B2
• Filed: 09/17/2018
• Issued: 05/05/2020
• Est. Priority Date: 09/28/2017
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Miki, Hirohisa
• Primary Examiner(s): Park, Sanghyuk
• Application Number:
  US16/132,826
• Publication Number:
  US 20190096980A1
• Time in Patent Office: 596 Days
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2380/02 Flexible displays
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1244 for preventing breakage, peeling or short circuiting
• CPC Class Codes: H01L 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
• 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 59/873 Encapsulations
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A display device includes a display region, a peripheral region around the display region, a substrate having flexibility, a terminal group in the peripheral region, a plurality of connection wirings connected to the terminal group, extending from the terminal group in a first direction and arranged in a second direction intersecting the first direction, an inorganic insulating film in the peripheral region, and an organic insulating film in the peripheral region. The peripheral region has a peripheral region (first peripheral region) curved in a thickness direction of the substrate. The first peripheral region includes a region (first region) that overlaps each of the plurality of connection wirings and a region (second region) that does not overlap the plurality of connection wirings. The first region and the second region are arranged in the second direction. The inorganic insulating film and the organic insulating film are present in the first region, and the inorganic insulating film is not present and the organic insulating film is present in the second region.

Claims

1. A display device comprising:

a display region;

a peripheral region around the display region;

a substrate having flexibility;

a terminal group in the peripheral region;

a plurality of connection wirings connected to the terminal group, extending from the terminal group in a first direction and arranged in a second direction intersecting the first direction;

an inorganic insulating film in the peripheral region; and

an organic insulating film in the peripheral region,

wherein the peripheral region has a first peripheral region curved in a thickness direction of the substrate,

the first peripheral region includes a first region that overlaps the plurality of connection wirings and a second region that does not overlap the plurality of connection wirings,

the first region and the second region are arranged in the second direction,

the inorganic insulating film and the organic insulating film are present in the first region, and

the inorganic insulating film is not present and the organic insulating film is present in the second region.

2. The display device according to claim 1,

wherein the organic insulating film is interposed between each of the plurality of connection wirings and the substrate.

3. The display device according to claim 2,

wherein the organic insulating film in the peripheral region includes a first organic insulating film in the first region and a second organic insulating film in the second region,

the first organic insulating film is not present in the second region, and

the first organic insulating film is covered with the second organic insulating film in the first region.

4. The display device according to claim 2,

wherein the first region includes a first A region and a first B region, and

a thickness of the organic insulating film in the first A region is smaller than a thickness of the organic insulating film in the first B region.

5. The display device according to claim 4,

wherein the first region includes a plurality of the first B regions, and

the first A region is sandwiched between the plurality of first B regions.

6. The display device according to claim 5,

wherein the first A region and the plurality of first B regions extend in an extending direction of each of the plurality of connection wirings.

7. The display device according to claim 5,

wherein the first region includes a plurality of the first A regions, and

the plurality of first A regions and the plurality of first B regions are alternately arranged in an extending direction of each of the plurality of connection wirings.

8. The display device according to claim 7,

wherein the plurality of first A regions extend in a direction intersecting the extending direction of each of the plurality of connection wirings and are continuous with the second region.

9. The display device according to claim 2,

wherein each of the plurality of connection wirings includes a plurality of openings and a wiring portion surrounding each of the plurality of openings,

the first region includes a first C region and a first D region,

the first C region overlaps the wiring portion and the inorganic insulating film, and

the first D region overlaps the opening and does not overlap the wiring portion and the inorganic insulating film.

10. The display device according to claim 9,

wherein the organic insulating film is present in the first D region.

11. The display device according to claim 1,

wherein the organic insulating film in the peripheral region includes a first organic insulating film in the first region and a second organic insulating film in the second region,

the first organic insulating film is not present in the second region, and

the first organic insulating film is covered with the second organic insulating film in the first region.

12. The display device according to claim 1,

wherein the first region includes a first A region and a first B region, and

a thickness of the organic insulating film in the first A region is smaller than a thickness of the organic insulating film in the first B region.

13. The display device according to claim 12,

wherein the first region includes a plurality of the first B regions, and

the first A region is sandwiched between the plurality of first B regions.

14. The display device according to claim 13,

wherein the A first region and the plurality of first B regions extend in an extending direction of each of the plurality of connection wirings.

15. The display device according to claim 13,

wherein the first region includes a plurality of the first A regions, and

the plurality of first A regions and the plurality of first B regions are alternately arranged in an extending direction of each of the plurality of connection wirings.

16. The display device according to claim 15,

wherein the plurality of first A regions extend in a direction intersecting the extending direction of each of the plurality of connection wirings and are continuous with the second region.

17. The display device according to claim 1,

wherein each of the plurality of connection wirings includes a plurality of openings and a wiring portion surrounding each of the plurality of openings,

the first region includes a first C region and a first D region,

the first C region overlaps the wiring portion and the inorganic insulating film, and

the first D region overlaps the opening and does not overlap the wiring portion and the inorganic insulating film.

18. The display device according to claim 7,

wherein the organic insulating film is present in the first D region.

19. The display device according to claim 1,

wherein a separation distance between adjacent connection wirings of the plurality of connection wirings is three times or more a width of each of the plurality of connection wirings.

20. The display device according to claim 1,

wherein a thickness of the organic insulating film in the first region is three times or less of a total value of a thickness of the inorganic insulating film and a thickness of the connection wiring in the first region.