KR20170024435A

KR20170024435A - complicate patternable single plate touch sensor

Info

Publication number: KR20170024435A
Application number: KR1020150119708A
Authority: KR
Inventors: 이범우
Original assignee: 주식회사 엘지화학
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2017-03-07
Also published as: KR101993416B1

Abstract

The present invention relates to a cross-sectional touch sensor, and provides a touch sensor apparatus which can perform complex electrode structural patterning by changing a structure of the existing electrode. In addition, the present invention relates to a cross-sectional touch sensor, and provides a high-performance touch sensor apparatus through complex electrode structural patterning. The cross-sectional touch sensor comprises: a detecting area in which a plurality of sensing areas are two-dimensionally arranged on a single substrate; a plurality of driving electrodes (Tx) for supplying a driving signal in the detecting area; a plurality of receiving electrodes (Rx) for sensing a change of the driving signal in the detecting area; and a control unit for controlling the driving electrode and the receiving electrode.

Description

[0001] The present invention relates to a complicated patternable single plate touch sensor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-sided touch panel, and more particularly, to a device having a precise touch sensitivity and a high resolution by changing the structures of Rx (receiving electrode) and Tx (transmitting electrode).

A conventional touch screen sensor uses two electrode layers as discrete position sensing type contact position sensing sensors. The conventional contact position sensing sensor includes a vertical position sensing layer Rx for sensing a vertical position, a horizontal position sensing layer Tx and a vertical position sensing layer Rx for sensing a horizontal position and a horizontal position sensing layer Tx And a shielding layer for shielding electrical noise to the outside. These three layers are laminated through an adhesive layer, and a transparent window can be laminated via an adhesive layer on top of the longitudinal position sensing layer Rx or the lateral position sensing layer Tx.

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

If the sensing area is arranged at M positions and N positions vertically on the surface of a single film, the touch sensor circuit for detecting contact may detect (M * N) A channel is required. However, if a separate sensing layer is formed by separating the sensing patterns for detecting the horizontal position and the vertical position, the contact position with respect to the entire area can be detected with only (M + N) channels. Therefore, in order to prevent the number of sensing regions from being limited by the number of channels of the touch sensor circuit for detecting contact, the conventional contact position sensing sensor is formed as a separate layer by separating the horizontal position sensing layer and the vertical position sensing layer.

However, such a conventional contact position detecting sensor has a problem that the thickness of the stacked layers of the sensor becomes thick due to the construction of the plurality of sensing layers, and the electrode patterns are formed by the transparent conductive material such as ITO or the fine electrode, In the process of forming the electrode pattern, since expensive ITO or high-cost process is used, the conventional contact position detecting sensor increases the overall manufacturing cost.

As an alternative to this, various studies have been made on a single-sided touch sensor that has 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 grasp the touch position.

Meanwhile, in recent years, as the accuracy of the touch sensor is increasingly required, methods for increasing the resolution of the touch sensor have been researched.

Therefore, the present invention improves the electrode structure of the touch sensor and provides a technical idea for a precise high-performance touch sensor.

The present invention provides a touch sensor device capable of patterning a complicated electrode structure by changing a conventional electrode structure in a single-sided touch sensor.

The present invention also provides a high-performance touch sensor device by patterning complex electrode structures in a single-sided touch sensor.

The present invention relates to a one-sided touch sensor, and more particularly, to a touch sensor having a plurality of sensing electrodes arranged in a two-dimensional array on a single substrate, a plurality of driving electrodes Tx for supplying driving signals in the sensing region, A plurality of receiving electrodes Rx for sensing changes, and a control unit for controlling the driving electrodes and the receiving electrodes.

The plurality of sensing areas are coupled to two different first driving transmis- sion and second driving electrodes Tx1 and Tx2 and two different first receiving electrodes and second receiving electrodes Rx1 and Rx2, Wherein traces of the first and second driving electrodes Tx1 and Tx2 are arranged in a first axis direction in an outer wiring region outside the sensing region and traces of the first and second receiving electrodes Rx1 and Rx2 are arranged in a first axis direction, Is arranged in the inner wiring area between the sensing area and the outer wiring area so as not to overlap the traces of the first and second driving electrodes (Tx1, Tx2) in 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 axis direction.

The outer wiring region where the first and second driving electrodes Tx1 and Tx2 traces are wired is formed by coupling two different first and second driving electrodes Tx1 and Tx2 and two different receiving electrodes Rx1 and Rx2, And the first and second driving electrodes Tx1 and Tx2 traces wired to the outer wiring region are wired so as not to overlap each other or intersect with each other.

An inner wiring area in which the first and second receiving electrodes Rx1 and Rx2 are traced is disposed between the sensing area and the outer wiring area or between the driving electrode and the receiving electrode, The receiving electrodes Rx1 and Rx2 traces are wired so that they do not overlap with each other or cross each other.

The controller includes a device for reducing the noise effect generated by the first and second receiving electrodes (Rx1, Rx2) traces in the inner wiring region disposed between the driving electrode and the receiving electrode.

The present invention improves the electrode structure in a one-sided touch sensor to enable complicated patterning.

Further, as the electrode structure of the one-sided touch sensor becomes complicated, the present invention can produce a precision touch sensor with improved resolution of the touch sensor.

1 is a configuration diagram of a one-sided 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 traces of the present invention are arranged on one side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

The structure of the one-sided touch sensor of the present invention will be described with reference to Fig.

The present invention relates to a one-sided touch sensor in which a plurality of sensing regions (400) are arranged in two dimensions on a single substrate to constitute a sensing region (500).

The sensing region 400 is coupled to two driving electrodes Tx1 and Tx2 110 and 120 and two receiving electrodes Rx1 and Rx2 210 and 220 to form a sensing region.

More specifically, the sensing region includes a first driving electrode (Tx1) 110, a first receiving electrode (Rx1) 210, a second receiving electrode (Rx2) 220, a second driving electrode Tx2) 120 in this order.

Such an electrode structure can realize dense electrode patterning as compared with the conventional electrode structure. Accordingly, the noise effect is reduced, the strength of the signal is strengthened, the sensitivity is improved, the number of electrodes per unit area is increased, and the resolution of the touch sensor is improved.

The first driving electrode Tx1 trace 111 connecting the first driving electrode Tx1 110 is connected to the first driving electrode Tx1 110 and the control unit 300, And is wired to one side of the outer wiring region located on both outer sides of the region.

The second driving electrode Tx2 trace 121 connecting the second driving electrode Tx2 120 is connected to the second driving electrode Tx2 120 and the control unit 300, And is wired to the other side of the outer wiring region located on the side outer side.

Hereinafter, the reason why the first driving electrode (Tx1) trace 111 and the second driving electrode (Tx2) 121 are wired to both sides of the outer wiring region will be described with reference to FIG.

3, the lengths of the first and second driving electrodes Tx1 and Tx2 traces 112 and 122 are equal to the lengths of the first and second driving electrodes Tx1 and Tx2 The first receiving electrode Rx1 trace 212 is wired only in a 'C' form to connect the adjacent first receiving electrodes Rx1 to form the first receiving electrode Rx1 of FIG. 2 The second receiving electrode Rx2 trace 222 is continuously wired in the form of an 'S' to the second receiving electrode Rx2 trace 221 of FIG. 2, although the length of the trace is shorter than the trace 211 of FIG. It becomes longer.

If the difference in length between the two reception electrodes Rx1 and Rx2 traces 212 and 222 is different, the resistances of the respective traces are different from each other, resulting in a difficulty in signal processing of the receiving electrode and 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 region so that the two receiving electrodes Rx1 and Rx2 traces 211 and 221 have the same length.

Rx1 and Rx2 traces 211 and 221 which are wiring lines connecting the first and second reception electrodes Rx1 and Rx2 210 and 220 to the control unit are connected to the inner- Area.

Hereinafter, the structure of the first and second receiving electrodes Rx1 and Rx2 210 and 220 and the first and second receiving electrodes Rx1 and Rx2 traces 211 and 221 will be described with reference to FIG.

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

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

At this time, the interval between the first receiving electrode Rx1 210 and the second receiving electrode Rx2 220 is narrower than the interval between the two receiving electrodes Rx1 and Rx2 210 and 220 in the conventional touch sensor, Complex electrode patterning becomes possible.

Therefore, a more precise and high-performance touch sensor can be manufactured, and the touch signal is received more and the sensitivity of the touch is increased.

On the other hand, the first receiving electrode (Rx1) trace of the inner wiring area is a wiring connecting the first receiving electrodes and the control unit, and should not overlap or intersect with 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 axis direction, and the first receiving electrode Rx2 is connected to the first receiving electrode Rx2 Axis direction and passes between the second receiving electrode Rx2 and the second driving electrode Tx2.

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

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the 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:

Claims

In the single-sided touch sensor,
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 driving signals in the detection region;
A plurality of receiving electrodes (Rx) sensing a driving signal change in the detection region;
A control unit for controlling the driving electrode and the receiving electrode;
Wherein the touch sensor is configured to include:

The method according to claim 1,
The plurality of sensing areas
Two first receiving electrodes and two second receiving electrodes Rx1 and Rx2 which are different from the two first driving electrodes and the second driving electrodes Tx1 and Tx2 are coupled to constitute one sensing region
The traces of the first and second driving electrodes Tx1 and Tx2 are arranged in a first axis direction in an outer wiring region outside the sensing region;
The traces of the first and second receiving electrodes Rx1 and Rx2 are arranged in an inner wiring region between the sensing region and the outer wiring region so as not to overlap the traces of the first and second driving electrodes Tx1 and Tx2 of the outer wiring region.
Wherein the touch sensor is a touch sensor.

The method of claim 2,
Wherein the sensing region is formed by sequentially arranging a first driving electrode Tx1, a first receiving electrode Rx1, a second receiving electrode Rx2, and a second driving electrode Tx2 in the first axis direction Single-sided touch sensor.

The method of claim 2,
The first and second driving electrodes Tx1 and Tx2 traces are disposed on both sides of the sensing region and the first and second driving electrodes Tx1 and Tx2 are wired in the outer wiring region. And wherein the sensor does not overlap or cross each other.

The method of claim 2,
The inner wiring region in which the first and second receiving electrodes (Rx1, Rx2)
Wherein the first and second receiving electrodes (Rx1, Rx2) traces which are arranged between the sensing region and the outer wiring region or between the driving electrode and the receiving electrode do not overlap each other or intersect with each other. Touch sensor.

The method according to claim 4 or 5,
The driving electrode and the receiving electrode are arranged such that a first driving electrode Tx1, a first receiving electrode Rx1, a second receiving electrode Rx2 and a second driving electrode Tx2 are arranged in order in the first axis direction Touch sensor.