Display device

• US 10,170,727 B2
• Filed: 04/11/2017
• Issued: 01/01/2019
• Est. Priority Date: 08/30/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Sato, Toshihiro, Ito, Ryoichi
• Primary Examiner(s): Wilczewski, Mary
• Assistant Examiner(s): Chiu, Tsz
• Application Number:
  US15/484,683
• Publication Number:
  US 20170222180A1
• Time in Patent Office: 630 Days
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H10K 50/822 characterised by their shape
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/1275 Electrical connections of the two substrates
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

An organic electroluminescent device with a touch sensor including: a first substrate; a second substrate arranged opposite to the first substrate; an organic EL element layer arranged above the first substrate; a first sealing film arranged toward the second substrate of the organic EL element layer, covering the organic EL element layer, and including a first inorganic layer; plural first detection electrodes extending in one direction, and arranged in parallel toward the second substrate of the first sealing film; a second sealing film arranged toward the second substrate of the first detection electrodes, and including a second inorganic layer; plural second detection electrodes extending in another direction different from the one direction, and arranged in parallel toward the second substrate of the second sealing film; and a touch sensor control unit controlling a potential to detect a touch with a display surface.

Claims

1. A display device comprising:

a first substrate having an insulating surface;

a display region having a plurality of pixels arranged in a matrix on the insulating surface, each of the plurality of pixels having a display element;

a first sealing film on the display element and covering the display element;

a first detection electrode layer on the first sealing film, the first detection electrode layer having a protruding surface at an opposite side from the first sealing film;

a second sealing film on the first detection electrode layer, the second sealing film being in contact with the protruding surface of the first detection electrode;

a second detection electrode layer on the second sealing film, the second detection electrode layer having a protruding surface at an opposite side from the second sealing film; and

a terminal region having a plurality of connection terminals on the insulating surface, wherein

at least one of the first detection electrode layer and the second detection electrode layer is connected to one of the plurality of connection terminals via a contact hole formed in the first sealing film or the second sealing film.

2. The display device according to claim 1, further comprising a third sealing film on the second detection electrode layer, the third sealing film being in contact with the protruding surface of the second detection electrode layer.

3. The display device according to claim 1, wherein

the third sealing film covers a region above the contact hole.

4. The display device according to claim 1, further comprising a second substrate, wherein

the second substrate has no electrode layer which is connected to the first detection electrode layer, the second detection electrode layer, and one of the plurality of connection terminals,

the second substrate is opposite to the first substrate, and

the third sealing film is between the first substrate and the second substrate.

5. The display device according to claim 1, wherein

the first sealing film includes an inorganic layer on the display element and an organic layer on the inorganic layer.

6. The display device according to claim 1, wherein

the display element includes an anode, a cathode, and an EL layer between the anode and the cathode,

the cathode is commonly formed across the plurality of pixels, and

the first sealing film is entirely in contact with an upper surface of the cathode.

7. The display device according to claim 1, wherein

the first detection electrode layer is entirely in contact with an upper surface of the first sealing film at a region where overlaps with the display region, and

the second detection electrode layer is entirely in contact with an upper surface of the second sealing film at the region where overlaps with the display region.

8. A display device comprising:

a first substrate having an insulating surface;

a display region having a plurality of pixels arranged in a matrix on the insulating surface, each of the plurality of pixels having a display element;

a first sealing film on the display element and covering the display element;

a first detection electrode layer on the first sealing film, the first detection electrode having an upper surface at an opposite side from the first sealing film, and a side surface;

a second sealing film on the first detection electrode layer, the second sealing film being in contact with the upper surface and the side surface of the first detection electrode layer;

a second detection electrode layer on the second sealing film, the second detection electrode having an upper surface at an opposite side from the first sealing film, and a side surface; and

a terminal region having a plurality of connection terminals on the insulating surface, wherein

at least one of the first detection electrode layer and the second detection electrode layer is connected to one of the plurality of connection terminals via a contact hole formed in the first sealing film or the second sealing film.

9. The display device according to claim 8, further comprising a third sealing film on the second detection electrode layer, the third sealing film being in contact with the upper surface and the side surface of the second detection electrode layer.

10. The display device according to claim 8, wherein

the third sealing film covers a region above the contact hole.

11. The display device according to claim 8, further comprising a second substrate, wherein

the second substrate has no electrode layer which is connected to the first detection electrode layer, the second detection electrode layer, and one of the plurality of connection terminals,

the second substrate is opposite to the first substrate, and

the third sealing film is between the first substrate and the second substrate.

12. The display device according to claim 8, wherein

the first sealing film includes an inorganic layer on the display element and an organic layer on the inorganic layer.

13. The display device according to claim 8, wherein

the display element includes an anode, a cathode, and an EL layer between the anode and the cathode,

the cathode is commonly formed across the plurality of pixels, and

the first sealing film is entirely in contact with an upper surface of the cathode.

14. The display device according to claim 8, wherein

the first detection electrode layer is entirely in contact with an upper surface of the first sealing film at a region where overlaps with the display region, and

the second detection electrode layer is entirely in contact with an upper surface of the second sealing film at the region where overlaps with the display region.

15. A display device comprising:

a first substrate having an insulating surface;

a display region having a plurality of pixels arranged in a matrix on the insulating surface, each of the plurality of pixels having a display element;

a first sealing film on the display element and covering the display element;

a first detection electrode layer on the first sealing film, the first detection electrode having a lower surface being in contact with the first sealing film, an upper surface at an opposite side from the lower surface, and a side surface between the lower surface and the upper surface;

a second sealing film on the first detection electrode layer, the second sealing film covering the upper surface and the side surface of the first detection electrode layer; and

a second detection electrode layer on the second sealing film, the second detection electrode having a lower surface being in contact with the second insulating film, an upper surface at an opposite side from the lower surface, and a side surface between the lower surface and the upper surface.

16. The display device according to claim 15, further comprising a third sealing film on the second detection electrode layer, the third sealing film being in contact with the upper surface and the side surface of the second detection electrode layer.

17. The display device according to claim 16, further comprising a terminal region having a plurality of connection terminals on the insulating surface, wherein

at least one of the first detection electrode layer and the second detection electrode layer is connected to one of the plurality of connection terminals via a contact hole formed in the first sealing film or the second sealing film.

18. The display device according to claim 17, wherein

the third sealing film covers a region above the contact hole.

19. The display device according to claim 15, wherein

the first sealing film includes an inorganic layer on the display element and an organic layer on the inorganic layer.

20. The display device according to claim 15, wherein

the lower surface of the first detection electrode layer is entirely in contact with the first sealing film at a region where overlaps with the display region, and

the lower surface of the second detection electrode layer is entirely in contact with the second sealing film at the region where overlaps with the display region.