Touch sensor-antenna module and display device including the same

Patent metadata

Field	Value
Publication number	US-11340722-B2
Application number	US-202016811179-A
Country	US
Kind code	B2
Filing date	Mar 6, 2020
Priority date	Oct 4, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A touch sensor-antenna module includes a touch sensor electrode layer including a plurality of sensing electrodes and traces electrically connected to the sensing electrodes, and an antenna electrode layer disposed over the touch sensor electrode layer or under the touch sensor electrode layer. The antenna electrode layer includes an antenna pattern that does not overlap the traces in a planar view. An electrical interference from the traces may be reduced to improve an antenna signal property.

First claim

What is claimed is:

1. A touch sensor-antenna module, comprising:
a touch sensor layer having a pad region, the touch sensor layer comprising:
a substrate layer; and
a touch sensor electrode layer on the substrate layer, the touch sensor electrode layer comprising sensing electrodes and traces electrically connected to the sensing electrodes, wherein end portions of the traces are assembled in the pad region; and
an antenna electrode layer disposed over the touch sensor electrode layer or under the touch sensor electrode layer, the antenna electrode layer comprising an antenna pattern that does not overlap the traces to be physically spaced apart from the traces in a planar view, the antenna pattern electrically separated from the sensing electrodes and the traces,
wherein the antenna pattern is disposed at a different level from that of all of the sensing electrodes;
the antenna pattern comprises a plurality of antenna patterns, and each of the plurality of antenna patterns comprises a single radiation electrode, a signal pad and a transmission line that electrically connects the radiation electrode and the signal pad, and the signal pad is electrically connected only to the single radiation electrode;
the plurality of antenna patterns are independently separated from each other, and the plurality of antenna patterns are arranged along a peripheral region of the substrate layer not to overlap the pad region of the touch sensor electrode layer in the planar view and to be electrically and physically separated from the pad region of the touch sensor layer.

2. The touch sensor-antenna module according to claim 1 , wherein the antenna patterns do not overlap the sensing electrodes in the planar view.

3. The touch sensor-antenna module according to claim 2 , wherein the antenna patterns are disposed between the sensing electrodes in the planar view.

4. The touch sensor-antenna module according to claim 1 , wherein the antenna electrode layer further comprises a dummy antenna pattern formed at the same level with the antenna pattern.

5. The touch sensor-antenna module according to claim 4 , further comprising an antenna driving integrated circuit chip that is connected to the antenna pattern and is not connected to the dummy antenna pattern.

6. The touch sensor-antenna module according to claim 1 , wherein the antenna electrode layer further comprises a dummy pattern around the antenna pattern, and the antenna pattern and the dummy pattern include a mesh structure.

7. The touch sensor-antenna module according to claim 6 , wherein the sensing electrodes are entirely covered by the dummy pattern in the planar view.

8. The touch sensor-antenna module according to claim 1 , wherein the antenna pattern further comprises a ground pad that is spaced apart from the signal pad and electrically separated from the transmission line.

9. The touch sensor-antenna module according to claim 8 , wherein the ground pad comprises a pair of ground pads that are disposed to face each other with respect to the signal pad.

10. The touch sensor-antenna module according to claim 1 , further comprising a dielectric layer on which the antenna electrode layer is disposed.

11. The touch sensor-antenna module according to claim 1 , wherein the sensing electrodes comprise first sensing electrodes defining a plurality of first sensing electrode rows, and second sensing electrodes defining a plurality of second sensing electrode columns.

12. The touch sensor-antenna module according to claim 11 , wherein the traces comprise first traces each extending from the first sensing electrode row, and second traces each extending from the second sensing electrode column, and the first traces are dispersed at both lateral portions of the touch sensor-antenna module.

13. A display device comprising the touch sensor-antenna module according to claim 1 .

14. The touch sensor-antenna module according to claim 1 , wherein the pair of ground pads face each other with the signal pad interposed therebetween to be spaced apart from the signal pad at the same level from that of the single radiation electrode, the signal pad and the transmission line.

Assignees

• Dongwoo Fine Chem Co Ltd
• Postech Res & Business Dev Found

Inventors

• Oh Yun Seok
• Kim Jong Min
• Ryu Han Sub
• Hong Won Bin

Classifications

• H01Q1/44

  using equipment having another main function to serve additionally as an antenna {, e.g. means for giving an antenna an aesthetic aspect}(H01Q1/27 - H01Q1/34 take precedence) · CPC title

• H01Q1/52

  Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure (absorbing means H01Q17/00) · CPC title

• G06F3/0446

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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• H01Q9/0407

  Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40) · CPC title