Input sensing unit and electronic device including the same

Patent metadata

Field	Value
Publication number	US-11604524-B2
Application number	US-202017107913-A
Country	US
Kind code	B2
Filing date	Nov 30, 2020
Priority date	Feb 18, 2020
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

An electronic device including a display unit and an input sensing unit including a sensing insulating layer including a first insulating layer disposed on the display unit, and a second insulating layer disposed on the first insulating layer and including first contact holes and second contact holes, a first sensing electrode including first sensing patterns and a plurality of first conductive patterns disposed between the first sensing patterns, and a second sensing electrode including second sensing patterns and second conductive patterns disposed between the second sensing patterns, in which the first sensing patterns and the first conductive patterns are coupled to each other through corresponding ones of the first contact holes, and at least one of the first sensing electrode and the second sensing electrode is in contact with the first insulating layer through the second contact holes.

First claim

What is claimed is:

1. An electronic device, comprising:
a display unit configured to provide an image; and
an input sensing unit disposed on the display unit, the input sensing unit comprising:
a sensing insulating layer including a first insulating layer disposed on the display unit and a second insulating layer disposed on the first insulating layer, the second insulating layer including a plurality of first contact holes and a plurality of second contact holes;
a first sensing electrode including a plurality of first sensing patterns arranged in a first direction and extending in a second direction crossing the first direction, and a plurality of first conductive patterns disposed between the first sensing patterns; and
a second sensing electrode including a plurality of second sensing patterns arranged in the second direction and extending in the first direction, and a plurality of second conductive patterns disposed between the second sensing patterns,

wherein:
the first sensing patterns and the first conductive patterns are electrically coupled to each other through corresponding ones of the first contact holes; and
at least one of the first sensing patterns, the second sensing patterns, and the second conductive patterns is in direct contact with a portion of the first insulating layer exposed by the corresponding second contact hole.

2. The electronic device of claim 1 , wherein:
the first sensing pattern, the second sensing pattern, and the second conductive pattern comprise mesh lines defining a plurality of mesh openings; and
the mesh lines are disposed on the second insulating layer.

3. The electronic device of claim 2 , wherein the second contact holes overlap the mesh lines.

4. The electronic device of claim 2 , wherein the display unit comprises:
a circuit device layer including a plurality of transistors;
a display device layer including a pixel definition layer including a plurality of display openings, first electrodes respectively exposed by the openings, a second electrode opposite to the first electrodes, and emission layers disposed between the first electrodes and the second electrode; and
an encapsulation layer including a first thin inorganic layer covering the display device layer, a thin organic layer disposed on the first thin inorganic layer, and a second thin inorganic layer disposed on the thin organic layer, and
wherein each of the emission layers overlaps a corresponding one of the mesh openings.

5. The electronic device of claim 4 , wherein the first insulating layer is directly disposed on the second thin inorganic layer.

6. The electronic device of claim 2 , wherein:
the input sensing unit further comprises a reflection compensation pattern spaced apart from the first sensing electrode and the second sensing electrode, disposed on one of the first insulating layer and the second insulating layer, and disposed at an intersection of the mesh lines; and
a length of a short side of the reflection compensation pattern in a third direction is equal to a width of the mesh line that overlaps the reflection compensation pattern.

7. The electronic device of claim 6 , wherein a length of a long side of the reflection compensation pattern in a direction crossing the third direction is less than 50% of a width of one of the mesh openings.

8. The electronic device of claim 7 , wherein the reflection compensation pattern has an ‘X’ shape.

9. The electronic device of claim 1 , wherein:
the electronic device comprises an active region configured to provide the image from the display unit and to sense an external input from the input sensing unit, and a peripheral region adjacent to the active region; and
the second contact holes overlap the active region.

10. The electronic device of claim 1 , wherein the number of the second contact holes is greater than the number of the first contact holes.

11. The electronic device of claim 1 , wherein each of the first contact holes comprises two or more connection contact holes.

12. The electronic device of claim 11 , wherein each of the second contact holes comprise sub-contact holes having the same shape as the connection contact holes.

13. The electronic device of claim 1 , wherein the input sensing unit further comprises:
ground patterns respectively enclosed by the second sensing patterns and are spaced apart from the second sensing patterns; and
a ground conductive pattern disposed between the ground patterns.

14. The electronic device of claim 1 , wherein the input sensing unit further comprises floating patterns respectively enclosed by the first sensing patterns and are spaced apart from the first sensing patterns.

15. An input sensing unit, comprising
a first insulating layer;
first patterns disposed on the first insulating layer;
a second insulating layer disposed on the first insulating layer to cover the first patterns, and including first contact holes and second contact holes spaced apart from the first contact holes; and
second patterns disposed on the second insulating layer,
wherein:
some of the second patterns are electrically connected to the first patterns through the first contact holes; and
remaining ones of the second patterns are in direct contact with a portion of the first insulating layer exposed by the corresponding second contact hole.

16. The input sensing unit of claim 15 , wherein:
the second patterns comprise mesh lines defining a plurality of mesh openings; and
the second contact holes overlap the mesh lines.

17. The input sensing unit of claim 16 , wherein:
the input sensing unit further comprises a reflection compensation pattern spaced apart from the second patterns, disposed on one of the first insulating layer and the second insulating layer, and disposed at an intersection of the mesh lines; and
a length of a short side of the reflection compensation pattern in a first direction is equal to a width of the mesh line that overlaps the reflection compensation pattern.

18. The input sensing unit of claim 17 , wherein a length of a long side of the reflection compensation pattern in a direction crossing the first direction is less than half of a width of one of the mesh openings.

19. The input sensing unit of claim 18 , wherein the reflection compensation pattern has an ‘X’ shape.

20. The input sensing unit of claim 15 , wherein the number of the second contact holes is greater than the number of the first contact holes.

21. The input sensing unit of claim 15 , wherein each of the first contact holes comprises two or more connection contact holes.

22. The input sensing unit of claim 21 , wherein each of the second contact holes has sub-contact holes that have the same shape as the connection contact holes.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jinkyu
• Jeon Yeon-Mun
• Kwak Byoung-Chan
• Kim Jooil
• BAEK Sangmin
• WOO Jungchul
• Lee Kwangrae

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title