KR101993416B1

KR101993416B1 - complicate patternable single plate touch sensor

Info

Publication number: KR101993416B1
Application number: KR1020150119708A
Authority: KR
Inventors: 이범우
Original assignee: 주식회사 엘지화학
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2019-09-30
Also published as: KR20170024435A

Abstract

The present invention provides a touch sensor device in which a complex electrode structure can be patterned by changing a conventional electrode structure in a single-sided touch sensor.
In addition, the present invention provides a high-performance touch sensor device through the complex electrode structure patterning in the single-sided touch sensor.

Description

Complex patternable single plate touch sensor

The present invention relates to a single-sided touch panel, and more particularly to a device having a precise touch sensitivity and high resolution by changing the structures of Rx (receive electrode) and Tx (transmit electrode).

The conventional touch screen sensor uses two electrode layers as a discrete position sensing touch sensor. Conventional touch position sensor, the vertical position sensing layer (Rx) for sensing the vertical position, the horizontal position sensing layer (Tx) and the vertical position sensing layer (Rx) and the horizontal position sensing layer (Tx) for sensing the horizontal position It consists of a shielding layer to block electrical noise for The three layers may be stacked through the adhesive layer, and the transparent window may be stacked on the vertical position sensing layer Rx or the horizontal position sensing layer Tx via the adhesive layer.

The reason for configuring the horizontal position sensing layer Tx and the vertical position sensing layer Rx as separate layers in the conventional touch position sensing device is that the connection line is connected to an external circuit for detecting whether the contact is performed at each position. To minimize the number.

If the sensing zones are arranged at M positions horizontally and N positions vertically on the surface of a single film, the touch sensor circuit for detecting whether or not a contact is performed has (M * N) counts to detect touches in each sensing region. A channel is needed. However, when the sensing patterns for sensing the horizontal position and the vertical position are separated to form separate sensing layers, only the (M + N) channels can detect the contact position of the entire area. Therefore, the conventional touch position sensing sensor is configured as a separate layer by separating the horizontal position sensing layer and the vertical position sensing layer in order to prevent the number of sensing areas from being limited by the number of channels of the touch sensor circuit for detecting whether or not a touch exists.

However, such a conventional contact position sensor has a plurality of sensing layers, so that the thickness of the sensor is increased, and the first and second electrodes are formed by forming electrode patterning with a transparent conductive material such as ITO or a fine electrode. In the process of forming the electrode pattern, since the expensive ITO or expensive process is used, the overall manufacturing cost of the conventional contact position sensor increases.

As an alternative to this, various studies are being conducted on a single-sided touch sensor that produces the same effect as using two layers using only one electrode layer.

In the conventional single-sided touch sensor, a plurality of receiving electrodes Rx and a plurality of driving electrodes Tx are patterned on a single surface to determine a touch position.

On the other hand, in recent years, high accuracy of the touch sensor is required to increase the resolution of the touch sensor has been studied a lot.

Accordingly, the present invention improves the electrode structure of the touch sensor to provide a technical idea of a precise high-performance touch sensor.

The present invention provides a touch sensor device in which a complex electrode structure can be patterned by changing a conventional electrode structure in a single-sided touch sensor.

In addition, the present invention provides a high-performance touch sensor device through the complex electrode structure patterning in the single-sided touch sensor.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-sided touch sensor, comprising: a detection region in which a plurality of sensing regions are arranged in two dimensions on a single substrate, a plurality of driving electrodes Tx for supplying a driving signal in the detection region, and a driving signal in the detection region A plurality of receiving electrodes (Rx) for detecting a change, the driving electrode and the control unit for controlling the receiving electrode is composed of.

The plurality of sensing regions are coupled to two different first driving electrode and second driving electrodes Tx1 and Tx2 and two different first and second receiving electrodes Rx1 and Rx2. The traces of the first and second driving electrodes Tx1 and Tx2 are disposed in a first axial direction in the outer wiring region outside the sensing region, and the traces of the first and second receiving electrodes Rx1 and Rx2 are The inner wiring area is disposed between the sensing area and the outer wiring area so as not to overlap the traces of the first and second driving electrodes Tx1 and Tx2 of the outer wiring area.

The sensing region is arranged in the order of the first driving electrode Tx1, the first receiving electrode Rx1, the second receiving electrode Rx2, and the second driving electrode Tx2 in the first axial direction.

Two outer first and second driving electrodes Tx1 and Tx2 and two different receiving electrodes Rx1 and Rx2 are coupled to the outer wiring area where the first and second driving electrodes Tx1 and Tx2 are traced. The first and second driving electrodes Tx1 and Tx2 are disposed on both sides of the sensing area, and the wirings are not overlapped or intersected with each other.

The inner wiring area to which the first and second receiving electrodes Rx1 and Rx2 traces are wired is disposed between the sensing area and the outer wiring area or between the driving electrode and the receiving electrode, and the first and second wirings to the inner wiring area. The receiving electrode Rx1 and Rx2 traces are wired so as not to overlap or cross each other.

The control unit includes a device for reducing noise effects caused by traces of the first and second receiving electrodes Rx1 and Rx2 in the inner wiring area disposed between the driving electrode and the receiving electrode.

The present invention improves the electrode structure in the single-sided touch sensor to enable complex patterning.

In addition, according to the present invention, as the electrode structure of the single-sided touch sensor becomes more complicated, a precise touch sensor having improved resolution of the touch sensor can be manufactured.

1 is a block diagram of a cross-sectional touch sensor according to the present invention.
2 is an enlarged view of one sensing area of the present invention.
3 is a view for explaining a problem in the case where the driving electrode trace of the present invention is disposed on one side.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art. It is provided for complete information.

Referring to Figure 1 will be described the structure of the cross-sectional touch sensor of the present invention.

The present invention relates to a single-sided touch sensor in which a plurality of sensing regions 400 are arranged in two dimensions on a single substrate to form the detection region 500.

Two sensing electrodes Rx1 and Rx2 210 and 220 are coupled to two driving electrodes Tx1 and Tx2 110 and 120 to form one sensing area.

More specifically, the sensing region includes a first driving electrode Tx1 110, a first receiving electrode Rx1 210, a second receiving electrode Rx2 220, and a second driving electrode in the first axial direction. Tx2) 120 is arranged in order.

This electrode structure can implement a denser electrode patterning compared to the conventional electrode structure. Therefore, the noise effect is reduced, the signal strength is increased, the sensitivity is improved, and the number of electrodes per unit area is increased, so that the resolution of the touch sensor is improved.

Meanwhile, the first driving electrode Tx1 trace 111 connecting the first driving electrode Tx1 110 is detected by a wire connecting the first driving electrode Tx1 110 and the controller 300. The wires are wired to one side of the outer wiring area positioned at both sides of the area.

The second driving electrode Tx2 trace 121 connecting the second driving electrodes Tx2 120 is a wiring connecting the second driving electrodes Tx2 120 and the control unit 300 to the detection area. It is routed to the other side of the outer wiring area located at the side edge.

Hereinafter, referring to FIG. 3, the reason for wiring the first driving electrode Tx1 trace 111 and the second driving electrode Tx2 121 to both of the outer wiring regions will be described.

When the driving electrode traces are arranged on one side as shown in FIG. 3, the lengths of the traces 112 and 122 of the first and second driving electrodes Tx1 and Tx2 are the first and second driving electrodes Tx1 and Tx2 of FIG. 2. Although not different from the traces 111 and 121, the first receiving electrode Rx1 trace 212 is wired only in a 'c' shape to connect the first adjacent receiving electrode Rx1 to the first receiving electrode of FIG. 2. Although the length of the wiring is shorter than that of the Rx1 trace 211, the second receiving electrode Rx2 trace 222 is continuously wired in an 'S' shape, so that the second receiving electrode Rx2 trace 221 of FIG. It will be longer.

As such, when the length difference between the traces 212 and 222 of the two receiving electrodes Rx1 and Rx2 occurs, the resistance value of each trace is changed, which causes difficulty in signal processing of the receiving electrode and leads to a decrease in sensitivity of the touch sensor.

Therefore, in the present invention, the first and second driving electrodes Tx1 and Tx2 traces 111 and 121 are wired to both sides of the outer wiring area so that the two receiving electrodes Rx1 and Rx2 traces 211 and 221 have the same length.

Meanwhile, the receiving electrodes Rx1 and Rx2 traces 211 and 221, which are wirings connecting the first and second receiving electrodes Rx1 and Rx2 210 and 220 to the control unit, are internal wirings between the outer wiring area and the sensing area 400. Is wired to the area.

Hereinafter, the structures of the first and second receive electrodes Rx1 and Rx2 210 and 220 and the traces 211 and 221 of the first and second receive electrodes Rx1 and Rx2 will be described in more detail with reference to FIG. 2.

The first receiving electrode Rx1 210 is disposed in parallel with the first driving electrode Tx1 110 in a first axial direction.

The second receiving electrode Rx2 220 is disposed in parallel with the first receiving electrode Rx1 210 in a first axial direction.

At this time, the distance between the first receiving electrode (Rx1) 210 and the second receiving electrode (Rx2) 220 is smaller than the distance between the two receiving electrodes (Rx1, Rx2) (210, 220) in the conventional touch sensor, Complex electrode patterning is possible.

As a result, a more accurate and high-performance touch sensor can be manufactured, and a touch signal is better received, thereby increasing the sensitivity of the touch.

Meanwhile, the first receiving electrode Rx1 trace of the inner wiring area is a wire connecting the first receiving electrodes and the control unit and should not overlap or cross the second receiving electrode Rx2 trace and the driving electrode trace.

Therefore, the first receiving electrode Rx1 trace is wired to one side of the second receiving electrode Rx2 in the first axial direction, and the first receiving electrode Rx1 traces are disposed so as not to overlap and cross the second driving electrode Tx2 trace. The wires are wired in the second axis direction perpendicular to the axis to pass between the second receiving electrode Rx2 and the second driving electrode Tx2.

The second receive electrode Rx2 trace is also wired in a manner similar to the first receive electrode Rx1 trace so as not to overlap or cross the first receive electrode Rx1 trace and the drive electrode trace.

On the other hand, although the technical spirit of the present invention has been described in detail according to the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

100 driving electrode 200 receiving electrode
110: first driving electrode 210: first receiving electrode
120: second driving electrode 220: second receiving electrode
111: first driving electrode trace 211: first receiving electrode trace
121: second driving electrode trace 221: second receiving electrode trace
300: control unit

Claims

In the single-sided touch sensor,
A detection area in which a plurality of detection areas are arranged two-dimensionally on a single substrate;
A plurality of drive electrodes Tx for supplying a drive signal in the detection area;
A plurality of receiving electrodes Rx for detecting a change in a driving signal in the detection area;
A control unit controlling the driving electrode and the receiving electrode;
It is configured to include,
The plurality of sensing areas
Two different first and second driving electrodes Tx1 and Tx2 and two different first and second receiving electrodes Rx1 and Rx2 are coupled to each other to form a single sensing region.
The trace of the first driving electrode Tx1 is disposed in a first axial direction on one side of the outer wiring area formed on both sides of the outside of the sensing area,
The trace of the second driving electrode Tx2 is disposed in the first axial direction on the other side of the outer wiring area formed on both sides of the outside of the sensing area.
Each of the traces of the first and second receiving electrodes Rx1 and Rx2 may not be overlapped with the traces of the first and second driving electrodes Tx1 and Tx2 of the outer wiring area, between the sensing electrode and the sensing electrode, and between the sensing area and the sensing area. A cross-sectional touch sensor, characterized in that alternately arranged in the inner wiring area between the outer wiring area.

delete

The method according to claim 1,
In the sensing region, a first driving electrode Tx1, a first receiving electrode Rx1, a second receiving electrode Rx2, and a second driving electrode Tx2 are sequentially disposed in the first axial direction.
And a distance between the first driving electrode and the first receiving electrode, between the first receiving electrode and the second receiving electrode, and between the second receiving electrode and the second driving electrode by a predetermined interval.

The method according to claim 1,
And the first and second driving electrodes (Tx1 and Tx2) traces and the first and second receiving electrodes (Rx1 and Rx2) traces that are wired to the outer wiring area do not overlap or cross each other.

The method according to claim 1,
The first receiving electrode Rx1 trace is disposed between the receiving electrode and the driving electrode in an arbitrary sensing region, and alternately arranged in the inner wiring region in another sensing region adjacent to the arbitrary sensing region in the first axial direction. ,
The second receiving electrode Rx2 trace is disposed in the inner wiring area in the arbitrary sensing area, and is disposed between the receiving electrode and the driving electrode in another sensing area adjacent to the arbitrary sensing area in the first axial direction. Single-sided touch sensor.

The method according to claim 1,
And a length of the trace of the first receiving electrode (Rx1) and the trace of the second receiving electrode (, Rx2).