Sensor device and image display device including the same

Patent metadata

Field	Value
Publication number	US-2025123704-A1
Application number	US-202418911352-A
Country	US
Kind code	A1
Filing date	Oct 10, 2024
Priority date	Oct 11, 2023
Publication date	Apr 17, 2025
Grant date	—

Abstract

A sensor device includes touch sensing electrodes, traces extending from the touch sensing electrodes, touch sensor pads connected to the traces, an antenna unit disposed adjacent to the touch sensing electrodes and including a radiator, a transmission line connected to the radiator, and ground lines extending around the transmission line, and antenna pads forming a pad row together with the touch sensor pads, and including a signal pad connected to the transmission line and ground pads connected to the ground lines.

First claim

What is claimed is:

1 . A sensor device comprising:
touch sensing electrodes; traces extending from the touch sensing electrodes; touch sensor pads connected to the traces; an antenna unit disposed adjacent to the touch sensing electrodes, the antenna unit comprising a radiator, a transmission line connected to the radiator, and ground lines extending around the transmission line; and antenna pads forming a pad row together with the touch sensor pads, the antenna pads comprising a signal pad connected to the transmission line and ground pads connected to the ground lines.

2 . The sensor device according to claim 1 , wherein a pair of the ground lines face each other with the transmission line interposed therebetween.

3 . The sensor device according to claim 1 , wherein the transmission line and the ground lines have a bent line shape, respectively.

4 . The sensor device according to claim 1 , wherein the transmission line comprises an extended line part whose width is increased at an end adjacent to the radiator.

5 . The sensor device according to claim 1 , wherein the ground line comprises an extended ground part whose width is increased at an end adjacent to the radiator.

6 . The sensor device according to claim 1 , wherein the ground pad is disposed between the signal pad and the touch sensor pad.

7 . The sensor device according to claim 1 , wherein a plurality of antenna units are arranged in a row direction, and the signal pad and the ground pad are independently connected to each of the antenna units through the transmission line and the ground lines.

8 . The sensor device according to claim 7 , wherein at least one touch sensor pad among the touch sensor pads is disposed between the antenna pads connected to adjacent antenna units among the antenna units.

9 . The sensor device according to claim 7 , wherein the transmission lines connected to each of the plurality of antenna units have a bent line shape with the same length, respectively.

10 . The sensor device according to claim 1 , wherein the antenna pad and the touch sensor pads form a single pad row on the same layer.

11 . The sensor device according to claim 1 , wherein the transmission line of the antenna unit comprises a first transmission line and a second transmission line which extend in different directions from each other and are connected to the radiator, and
the signal pad is connected to each of the first transmission line and the second transmission line.

12 . The sensor device according to claim 1 , further comprising an antenna driving integrated circuit electrically connected with the antenna unit, the antenna driving integrated circuit configured to apply a reference potential to the ground pad, and apply a power supply signal having a potential greater than the reference potential to the signal pad.

13 . The sensor device according to claim 12 , further comprising a blocking pad inserted between the adjacent touch sensor pads among the touch sensor pads or a guard pad disposed at an end of the pad row.

14 . The sensor device according to claim 13 , further comprising a touch sensor driving integrated circuit electrically connected with the touch sensor pads, the touch sensor driving integrated circuit configured to apply a reference potential to the blocking pad or the guard pad, and apply a touch driving signal having a potential greater than the reference potential to the touch sensor pad.

15 . The sensor device according to claim 14 , wherein the reference potential applied to the blocking pad or the guard pad and the reference potential applied to the ground pad are the same as each other.

16 . The sensor device according to claim 13 , further comprising a blocking line extending between adjacent traces among the traces from the blocking pad.

17 . The sensor device according to claim 13 , further comprising a guard line in the form of a loop extending from the guard pad and surrounding the periphery of the touch sensing electrodes.

18 . An image display device comprising:
a display panel; and the sensor device according to claim 1 arranged in the display panel.

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Kwon Do Hyoung
• Huh Yoon Ho

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · 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