Touch sensor, and window laminate and image display device including the same

Patent metadata

Field	Value
Publication number	US-11256353-B2
Application number	US-202016902956-A
Country	US
Kind code	B2
Filing date	Jun 16, 2020
Priority date	Jun 25, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A touch sensor includes: a display portion including a base layer and a touch sensor layer on the base layer; a bending portion extending from the display portion and including a first part of a trace electrically connected to the touch sensor layer but not including the base layer; and a bonding portion extending from the bending portion and including a second part of the trace, wherein an end portion of the second part of the trace is connected to a flexible circuit board.

First claim

The invention claimed is:

1. A touch sensor comprising:
a display portion including a base layer and a touch sensor layer on the base layer;
a bending portion extending from the display portion and including a first part of a trace electrically connected to the touch sensor layer but not including the base layer; and
a bonding portion extending from the bending portion and including a second part of the trace, wherein an end portion of the second part of the trace is connected to a flexible circuit board,
wherein the base layer includes at least one of a polarizer, a polarizing plate, a retardation film, a reflective sheet, a brightness enhancing film, or a refractive index matching film.

2. The touch sensor according to claim 1 , wherein the bending portion includes a bending portion protective layer on an upper or a lower surface of the trace.

3. The touch sensor according to claim 2 , wherein the bending portion protective layer is made of a curable resin, and
the curable resin is selected from a UV curable resin, an optically clear adhesive (OCA), and a pressure sensitive adhesive (PSA).

4. The touch sensor according to claim 1 , wherein the bending portion is thinner than the display portion and the bonding portion.

5. The touch sensor according to claim 4 , wherein the bending portion includes a bending portion touch sensor layer extending from the touch sensor layer of the display portion and having a thickness of 2 to 10 μm.

6. The touch sensor according to claim 4 , wherein the bending portion protective layer has an elastic modulus of 0.1 to 1,000 Mpa.

7. A window laminate comprising:
a window substrate; and
the touch sensor according to claim 6 stacked on one surface of the window substrate.

8. An image display device comprising:
a display panel; and
the touch sensor according to claim 6 stacked on the display panel.

9. A window laminate comprising:
a window substrate; and
the touch sensor according to claim 4 stacked on one surface of the window substrate.

10. An image display device comprising:
a display panel; and
the touch sensor according to claim 4 stacked on the display panel.

11. The touch sensor according to claim 1 , wherein the bonding portion includes an upper support base and a lower support base on an upper surface and a lower surface of the flexible circuit board, respectively.

12. The touch sensor according to claim 11 , wherein the upper support base and the lower support base overlap with the second part of the trace included in the bonding portion.

13. The touch sensor according to claim 11 , wherein the lower support base is the same as the base layer of the display portion.

14. The touch sensor according to claim 11 , wherein the base layer and the lower support base has a through hole in a region of the bending portion.

15. The touch sensor according to claim 11 , further comprising an adhesive layer between the base layer and the touch sensor layer of the display portion and between the lower support base and the trace of the bonding portion.

16. The touch sensor according to claim 15 , wherein the adhesive layer has a through hole in a region of the bending portion.

17. A window laminate comprising:
a window substrate; and
the touch sensor according to claim 1 stacked on one surface of the window substrate.

18. An image display device comprising:
a display panel; and
the touch sensor according to claim 1 stacked on the display panel.

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Kim Junha
• Lee Jin Koo
• Lee Wonjong

Classifications

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• H05K3/361

  Assembling flexible printed circuits with other printed circuits · CPC title

• H05K2201/10128

  Display · CPC title

• H05K1/0281

  Reinforcement details thereof · CPC title