# US 2013/0162565 A1 · Touch sensor panel using oscillation frequency

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- Number: US 2013/0162565 A1
- Document ID: US20130162565A1
- Status: Published application
- Kind: A1
- Application number: 13/717,838
- Filed: 2012-12-18
- Published: 2013-06-27
- Earliest claimed: 2011-12-21
- Assignees: Interflex Corporation
- Inventors: Jai-Kyung KIM; Kwang-Sik Lee
- Web page: https://patentgrep.com/patent/US20130162565A1

## CPC

- G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads}
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

Disclosed are a device and a method of sensing a touch using an oscillation circuit. Touch sensor lines that detect a position by using a resistor and a capacitor of an RC oscillation circuit face each other to make pairs in a panel, and an oscillation frequency generated according to capacitance of the panel which is changed by a touch is measured through the adjacent touch sensor lines and two or more characteristics of the measured oscillation frequency are calculated to determine the touched position.

## Claims

### Claim 1

A touch sensor panel, comprising:
a substrate;
a plurality of first sensor lines formed on the substrate in one direction;
a plurality of second sensor lines spaced apart from the first sensor lines and formed between the first sensor lines;
an oscillation circuit connected to the first sensor lines and the second sensor lines;
a first signal line connecting the first sensor lines and the oscillation circuit;
a second signal line connecting the second sensor lines and the oscillation circuit;
first signal connection points connecting the first signal line and the first sensor lines; and
second signal connection point connecting the second signal line and the second sensor lines,
wherein an extending direction of the first sensor line from the first signal connection point is opposite to an extending direction of the second sensor line from the second signal connection point.

### Claim 2 (depends on 1)

The touch sensor panel of claim 1, wherein the touch sensor senses a change of capacitance.

### Claim 3 (depends on 2)

The touch sensor panel of claim 2, wherein the capacitance is capacitance between the first sensor line or the second sensor line and an external touch means.

### Claim 4 (depends on 3)

The touch sensor panel of claim 3, wherein the capacitance is changed when the touch means is close to or touches the panel, and a signal output from the oscillation circuit is changed by interworking with the change of the capacitance.

### Claim 5 (depends on 4)

The touch sensor panel of claim 4, wherein the oscillation circuit is connected with any one of the first sensor line and the second sensor line with an interval to output a signal.

### Claim 6 (depends on 5)

The touch sensor panel of claim 5, further comprising:
a detecting means connected to the oscillation circuit to detect the signal output from the oscillation circuit.

### Claim 7 (depends on 6)

The touch sensor panel of claim 6, wherein the detecting means stores and compares characteristics of an output signal when the oscillation circuit is connected to the first sensor line and an output signal when the oscillation circuit is connected to the second sensor line.

### Claim 8 (depends on 7)

The touch sensor panel of claim 7, wherein the characteristics of the output signals are at least one of voltage, amplitude, a frequency, and a cycle.

### Claim 9 (depends on 1)

The touch sensor panel of claim 1, wherein the first sensor line, the second sensor lines, the first signal line, and the second signal line are positioned on the same surface of the substrate.

### Claim 10 (depends on 1)

The touch sensor panel of claim 1, wherein the substrate is made of any one of a polymer film, plastic, and glass.

### Claim 11 (depends on 1)

The touch sensor panel of claim 1, wherein the first sensor line and the second sensor line are made of a material containing transparent conductive oxide (TCO).

### Claim 12 (depends on 11)

The touch sensor panel of claim 11, wherein the transparent conductive oxide contains any one of ITO, IZO, ATO, AZO, and ZnO.

### Claim 13 (depends on 1)

The touch sensor panel of claim 1, wherein the first sensor line and the second sensor line have strip line shapes.

### Claim 14 (depends on 1)

The touch sensor panel of claim 1, wherein the first sensor line and the second sensor line have engaged sawteeth shapes.

### Claim 15 (depends on 1)

The touch sensor panel of claim 1, wherein widths of the first sensor line and the second sensor line are in the range of 0.1 mm to 2 mm, respectively.