WO2013147393A1

WO2013147393A1 - Touch panel having uniform touch input sensitivity

Info

Publication number: WO2013147393A1
Application number: PCT/KR2012/011305
Authority: WO
Inventors: 김성한; 신형철; 윤일현
Original assignee: 주식회사 지니틱스
Priority date: 2012-03-27
Filing date: 2012-12-21
Publication date: 2013-10-03

Abstract

Disclosed is a touch panel in which a sensing electrode and a driving electrode are formed on the same layer. The one sensing electrode includes: a main electrode portion extending lengthwise in one direction; and N units of branching electrode portions formed in such a manner as to branch from N branching points of the main electrode portion. Each of the branching electrode portions has a spiral shape. A driving electrode cell included in the driving electrode extends in the direction of extension of the branching electrode portion and is formed in a spiral shape.

Description

Touch panel with uniform touch input sensitivity

The present invention relates to a touch panel, and more particularly to a touch panel having a uniform input sensitivity.

The touch input device refers to an input device that detects a position (coordinate) of an input tool such as a finger on a touch panel and provides information regarding the detected position as input information. Representative methods include resistive and capacitive methods. The capacitive type is largely divided into self-capacitance and mutual storage. The mutual power storage method includes a driving electrode and a sensing electrode made of a transparent conductive material. Usually, extending directions of the driving electrode and the sensing electrode are different from each other, and in some embodiments, the two electrodes may be perpendicular to each other.

Capacitance may be formed between the sensing electrode and the driving electrode, and in particular, most capacitance may be formed at the intersection of the two electrodes. Such an intersection region may be referred to herein as a generic term 'touch node' or 'node'. Since at least one driving electrode and at least one sensing electrode are provided in one touch panel, at least one touch node may exist.

When the finger touches or touches the touch node described above, the capacitance value formed between the sensing electrode and the driving electrode forming the touch node changes. Therefore, by measuring whether the capacitance value formed between the sensing electrode and the driving electrode changes, it is possible to determine whether the finger touches the touch panel.

When a current is applied to a specific driving electrode in order to measure whether the capacitance formed between the sensing electrode and the driving electrode is changed, electric charge is injected into the N sensing electrodes N≥1 crossing the specific driving electrode. The amount of charge injected depends on the capacitance values formed by the particular driving electrode and the N sensing electrodes described above, respectively. Accordingly, by measuring and comparing the amount of charge injected into the one or more sensing electrodes, whether there is a touch node in which touch input is generated among the N touch nodes formed by the specific driving electrode and the N sensing electrodes, and the touch input position. Can be determined. By performing this process on each of the plurality of driving electrodes, it is possible to determine the touch input position of the entire area of the touch panel.

One touch node has a contact surface of a predetermined area A1 and the center point of the contact surface may be referred to as a 'node center point'. On the other hand, when an input tool such as a finger has a contact surface of a predetermined area A2 when it is in contact with the touch panel, the center point of the contact surface may be referred to as a 'touch center point'. According to the distance d between the touch center point and the node center point, an area of a portion covering the one touch node of the contact surface is changed, and as a result, the distance d between the touch center point and the node center point is changed. Accordingly, the amount of change in capacitance of the touch node is changed. At this time, if the amount of change ΔC of the capacitance does not increase or decrease linearly with the distance d, the calculation of the touch input position is complicated.

In addition, when the internal pattern in the first axis (ex: x axis) direction of the one touch node does not correspond to the internal pattern in the second axis (ex: y axis) direction orthogonal thereto, the sensing in the x direction There is a problem that the characteristics and the detection characteristics in the y direction may be different.

The present invention provides a sensing electrode and a driving electrode having a new structure for changing the magnitude of the capacitance variation of a specific touch node of a touch panel in which the sensing electrode and the driving electrode are formed on the same layer to be nearly linear according to the coordinates of the touch input position. I would like to. In addition, the present invention provides a structure of a sensing electrode and a driving electrode such that the touch input sensing characteristic along the x axis direction and the touch input sensing characteristic along the y axis direction are similar to each other.

In order to solve the above problems, a touch panel according to an aspect of the present invention is provided. The touch panel is a touch panel in which a sensing electrode and a driving electrode are formed on the same layer, and one of the sensing electrodes includes a main electrode part extending in one direction; And N branch electrode parts branched from the N branch points of the main electrode part, wherein each of the branch electrode parts has a spiral shape, and the driving electrode-cell included in the driving electrode extends in the extending direction of the branch electrode part. It extends along and forms a swirl.

In this case, each of the branch electrode parts includes a first segment and a second segment connected to each other, and the first segment is divided by two virtual lines extending at one end and the other end of the branch electrode in a straight line. The second segment may be in a first one of the planes, and the second segment may be in a second one of the two planes.

In this case, each of the branch electrode parts may be composed of three or more straight segments connected to each other, and the three or more straight segments may be bent at a predetermined angle. In this case, the constant angle may be a right angle.

According to another aspect of the present invention, a touch panel may be provided. The touch panel is a touch panel in which a plurality of touch nodes including sensing electrodes-cells and driving electrodes-cells formed on the same layer are arranged in a matrix form, wherein each sensing electrode-cell has a first segment and a second segment connected to each other. And the first segment is in a first plane of two planes divided by an imaginary line extending straightly at one end and the other end of the sensing electrode-cell, and the second segment is the two segments. The plurality of sensing electrode-cells in a second plane of the plane and belonging to the same sensing electrode are connected to each other through the one end.

A touch panel according to another aspect of the present invention may be provided. The touch panel is a touch panel in which a first type electrode and a second type electrode are formed on the same layer, and the first type electrode includes a main electrode part extending in one direction; And N branch electrode parts branched from the N branch points of the main electrode part, wherein each of the branch electrode parts has a spiral shape, and the driving electrode-cell included in the driving electrode extends in the extending direction of the branch electrode part. It may extend along the spiral shape.

In this case, the first type-electrode may be a sensing electrode and the second type-electrode may be a driving electrode. Alternatively, the first type electrode may be a driving electrode and the second type electrode may be a sensing electrode.

By using the sensing electrode and the driving electrode of the new structure provided according to the present invention, the magnitude of the capacitance change amount of the specific touch node of the touch panel may be changed to be nearly linear according to the coordinates of the touch input position. In addition, it is possible to provide a structure of the sensing electrode and the driving electrode such that the sensing characteristic in the x-direction and the sensing characteristic in the y-axis direction have similar characteristics.

1A and 1B illustrate an operation principle of a touch panel in which a sensing electrode and a driving electrode are formed on the same layer.

2A to 2C illustrate a change in capacitance according to the position of the touch center point in one touch node of the touch panel.

3A to 3C illustrate the shape of one touch node and a driving electrode cell and a sensing electrode cell constituting the touch node according to various embodiments of the present disclosure.

4A illustrates a touch panel according to an exemplary embodiment of the present invention in which the touch nodes according to FIG. 3A are arranged in an 8 * 8 matrix form.

FIG. 4B illustrates a connection relationship outside the sensing area of the touch panel of the driving wiring 22 and the sensing wiring 12 shown in FIG. 4A.

5A to 5D illustrate a topology of a sensing electrode according to an exemplary embodiment of the present invention.

FIG. 6A illustrates only the sensing electrode-cell of the touch node illustrated in FIG. 3A to explain the meaning of the vortex shape used in the present invention.

FIG. 6B illustrates a sensing electrode cell having a shape deformed from the shape of the sensing electrode cell shown in FIG. 6A as another embodiment of the present invention.

FIG. 6C illustrates the shape of the touch node when the sensing electrode-cell has the same shape as that of FIG. 6B.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The terms used below are merely for referring to specific embodiments, and are not intended to limit the present invention. Also, the singular forms used below include the plural forms unless the phrases clearly indicate the opposite meanings. BRIEF DESCRIPTION OF THE DRAWINGS The drawings attached to this specification are shown in part exaggerated or reduced for convenience of description, and the scale of each part of the components shown in the drawings may vary when actually implementing an embodiment of the present invention.

The touch panel according to an embodiment of the present invention may include a plurality of transparent electrodes extending in a first direction, for example, a vertical direction. In addition, the touch panel may include a plurality of transparent electrodes extending in a second direction, for example, in a horizontal direction. Here, the first direction and the second direction may be perpendicular to each other, but are not limited thereto. In the present specification, for convenience, the electrode extending in the vertical direction may be referred to as a sensing electrode, and the electrode extending in the horizontal direction may be referred to as a driving electrode. However, in another embodiment, the roles of the vertical electrode and the horizontal electrode may be interchanged.

The sensing electrodes and the driving electrodes may be formed on different layers, or may be formed on the same layer. An intersection region of the sensing electrodes and the driving electrode may be defined, and these intersection regions may have a matrix structure. An area corresponding to each element of the matrix structure may be used as a reference unit for determining a touch input position in the touch panel. Such a basic unit may be referred to as a touch node in the present invention.

When a voltage is applied to the driving electrode, charge may be injected to the sensing electrodes through mutual capacitance Csense at the intersection of the driving electrode and the sensing electrodes. The amount of charge Qsense input to each sensing electrode may be expressed as a product of the first level Vdrive and the mutual capacitance Csense of the driving signal (ie, Qsense = Vdrive * Csense).

During a specific time period, a driving signal such as a pulse train in which the voltage of the first level Vdrive and the voltage of the second level 0V are periodically repeated may be applied to one of the driving electrodes. After a specific time period, the driving signal may be applied to another driving electrode. A DC voltage, for example, a voltage of 0V may be applied to the other driving electrodes except for the driving electrode to which the driving signal is input. However, according to the exemplary embodiment, a configuration in which a driving signal is simultaneously applied to several driving electrodes may be used.

1A and 1B illustrate an operation principle of a touch panel in which a sensing electrode 120 and a driving electrode 110 are formed on the same layer. As shown in FIG. 1B, when a touch input is made by the finger 600, a part of the electric field 510 from the driving electrode 110 is absorbed and blocked by the finger 600, and thus the driving electrode 110 and the sensing electrode 120 are blocked. The mutual capacitance value can vary (Csense → Csense-ΔCsense). When the dynamic range of the amount of change in mutual capacitance due to the touch input has an appropriately large value, it is advantageous to determine whether the touch input is performed. Therefore, the shape of the sensing electrode 120 and the driving electrode 110 is preferably to provide a sufficient electric field 510 that can be blocked / absorbed by the finger.

2A illustrates a touch panel in which a total of eight sensing electrodes C1 to C8 and a total of 12 driving electrodes R1 to R12 are formed. The area of each touch node where the sensing electrode and each driving electrode intersect is indicated by a square. When touching with a finger, an area that actually blocks the electric field from the driving electrode to the sensing electrode may be modeled as an ellipse or a circle. For the convenience of explanation, the description is based on the assumption that the model is circular.

FIG. 2B details the nodes [R3, C4], nodes [R3, C5], and nodes [R3, C6] of FIG. 2A. The touch input may be made around the point indicated by the indexes [-9] to [9] shown in FIG. 2B. In the case where a touch input is made centered on the point indicated by the index ([-9]), the index ([0]), and the index ([9]) (that is, the touch center point), the area where the electric field is blocked is each a circular area (A). [-9]), circular region A [0], and circular region A [9].

The y-axis (i.e., the axis perpendicular to the x-axis) value in FIG. Distances to the right and left from the center point. The indices [-9] to [9] in Fig. 2C correspond to the indices [-9] to [9] in Fig. 2B, respectively. If the touch input is made around the point indicated by the index ([0]) (that is, the node center point of the node [R3, C5]), the y value is blocked because the electric field on the node [R3, C5] is blocked the most. Is the maximum value. The point indicated by the index [-9] (ie, the node center point of the node [[R3, C4])) or the point represented by the index [[-9]) (ie, the node center point of the node [[R3, C6]) In the case where a touch input is made around), the y value becomes 0 since the electric field on the node [R3, C5] is not blocked. The straight line LI shown in FIG. 2C shows the change in the ideal capacitance according to the touch input position, and the curve LR shows the change in the actual capacitance in accordance with the touch input position. The reason that the straight line LI is ideal is that, if the change in capacitance due to the change in the touch input position satisfies the linearity, the calculation to be performed in the touch input processor can be simplified. D (xn) shown in FIG. 2C represents the difference between the straight line LI and the curve LR at the point x _n .

In the present invention, the degree suitable for interpolation is defined by the term Interpolability , which can be obtained by measuring the amount of change in capacitance between two adjacent cells over distance. Equation 1 quantifies the difference between the ideal interpolation response profile (LIP) and the actual interpolation response profile (LR).

Equation 1

According to Equation 1, it can be seen that the greater the interpolability, the closer to the ideal IRP.

In one embodiment of the present invention, in order to increase the IRP, the density of the line (sensing line) of the pattern in the sensing electrode and / or the driving electrode may be designed to be maximum. The density of the sensing line determines the distribution of the fringing cap in one touch node, which is proportional to the length of the driving electrode and the sensing electrode facing each other.

The interpolation response profile illustrated in FIG. 2C shows a symmetrical shape. This profile may appear mainly when each touch node of the touch panel has a symmetrical pattern. However, according to the specific configuration of the touch panel, as the asymmetry of each node increases, it is difficult to have a symmetric profile like the interpolation response profile shown in FIG. 2C. As described above, when the interpolation response profile is asymmetric, a problem may occur in that uniformity depending on the position of the touch input sensitivity is degraded.

3A to 3C illustrate the shape of one touch node and a driving electrode cell 11 and a sensing electrode cell 21 constituting the touch node according to various embodiments of the present disclosure. Referring to FIG. 3A, one touch node is provided adjacent to each other so that the sensing electrode-cell 21 and the driving electrode-cell 11 formed in a 'swirl' shape may be electrostatically coupled to each other. Since both the sensing electrode cell 21 and the driving electrode cell 11 are elongated in a spiral shape, the sensing characteristic ΔC (x) in the x-axis direction and the sensing characteristic ΔC (y) in the y-axis direction ) Are similar to each other to represent corresponding properties. In addition, since the electric field of the fringe capacitive component is distributed throughout the area inside one touch node, the above-described interpolability may have a large value, and thus more accurate detection is possible. Although the touch node of FIG. 3A may have a square shape, the touch node of FIG. 3A may be transformed into a rectangular shape according to the overall shape of the touch panel. In addition, the shape of the touch node of FIG. 3A may be modified as shown in FIG. 3B or 3C.

4A illustrates a touch panel according to an exemplary embodiment of the present invention in which the touch nodes according to FIG. 3A are arranged in an 8 * 8 matrix form. The touch panel includes a structure in which eight sensing electrodes C1 to C8, eight driving electrodes R1 to R8, a total of 64 driving wirings 22, and a total of eight sensing wirings 12 are formed on the same layer. can do.

A region in which the sensing electrode and the driving electrode are disposed may be defined as a 'sensing region'. In the outer region of the sensing region, first driving wirings for connecting the driving wirings 22 to each other may exist. The driving wiring 22, the first driving wiring and the sensing wiring 12 may be arranged on different layers.

One sensing electrode (ex: C1) may be formed to extend in the vertical direction along one column (column). Eight sensing electrode-cells 21 included in one sensing electrode may be directly connected to each other up and down, and further, eight sensing electrode-cells 21 included in one sensing electrode may be integrally formed. It may be.

One driving electrode (ex: R1) may be formed extending in the left and right directions along one row. The eight driving electrodes 11 included in one driving electrode are separated from each other by the sensing electrodes. Eight driving electrode cells 11 arranged separately from each other in one row (ex: R1) may be connected to each other to form one driving electrode. Therefore, for this purpose, the driving wirings ('second driving wirings') 22 may be connected to each driving electrode-cell 11, and each driving wiring 22 may be a so-called 'sense area' occupied by the driving electrode and the sensing electrode. It can extend to the outside of '. In the embodiment of FIG. 4A, since there are a total of 64 driving electrodes-cells 11, a total of 64 driving wirings 22 may be provided. The specific providing method of the driving wiring 22 is not limited by the drawings included in the present specification and may be implemented in various ways. The eight driving wirings 22 connected to the driving electrodes-cells 11 belonging to the same row may be connected to each other by first driving wirings provided separately from the outside of the sensing area. The first driving wiring and the second driving wiring 22 described above may be connected in various ways.

The left and right widths of the 36 touch nodes formed at the intersections of the six rows C2 to C7 and the six columns R2 to R7 shown in FIG. In this case, the upper and lower widths H2 of the 16 touch nodes existing in the first column R1 and the eighth column R8 may be smaller than the H1. In addition, the left and right widths W2 of the 16 touch nodes existing in the first row C1 and the eighth row C8 may be smaller than the W1. This can increase linearity and accuracy at the edge touchnodes. In addition, the touch panel according to FIG. 4A may have a symmetrical structure with respect to the center line CL. This is to allow the touch panel to have symmetrical touch input characteristics as a whole.

FIG. 4B illustrates a connection relationship outside the sensing area of the touch panel of the driving wiring 22 and the sensing wiring 12 shown in FIG. 4A. The eight driving wires 22 connected to the driving electrode cells included in the same driving electrode ex R1 may be connected to each other by the first driving wire D1. The remaining driving electrodes may also be connected to each other by first driving wirings D2 to D8, respectively. However, since the driving electrodes must be electrically separated from each other, when the driving wirings and the first driving wirings are arranged, the layout may be performed by using an insulating layer or vias. Since it is disclosed in various ways, it will not be described separately herein. Eight driving electrodes may be connected to the driving signal generator 1510, respectively. When the driving signal generator 1510 applies a driving signal to one driving electrode (ex: R1 and Y1), the driving signal generator 1510 may control the other driving electrode to have a fixed potential value, for example, a ground potential. The sensing wires 12 respectively connected to the sensing electrodes C1 to C8 illustrated in FIG. 4A may be directly connected to the driving signal detector 1520 through the first sensing wires S1 to S8. The driving signal detector 1520 may detect the magnitude of the driving signal detected from each of the sensing electrodes C1 to C8. The magnitude of the detected driving signal may vary depending on the magnitude of the capacitance formed between the driving electrode and the sensing electrode as described above. The touch input detector 1500 may be connected to the driving signal generator 1510 and the driving signal detector 1520 to determine a specific touch input position.

Referring to FIG. 5A, one sensing electrode includes a main electrode part SS extending vertically and a branch electrode part SB1 to SB8 branched from the main electrode part SS. The main electrode portion SS has a length of L2, and the branch electrode portions SB1 to SB8 each have a length of L1. In this case, a point where the branch electrode parts SB1 to SB8 and the main electrode part SS are connected, that is, one end of each branch electrode part SB1 to SB8 may be referred to as one end PS. In addition, the other end of each of the branch electrode parts SB1 to SB8 may be referred to as the other end PE.

The sensing electrode of FIG. 5A may be understood to have a shape in which each of the branch electrodes SB1 to SB8 is wound in a spiral shape in the sensing electrode of FIG. 5B. The total extension length L of the sensing electrode according to an embodiment of the present invention described with reference to FIGS. 5A and 5B is given by L = L2 + 8 * L1. Referring to FIG. 4A together, it can be understood that the capacitance of the driving electrode-cells 11 electrostatically coupled to one sensing electrode exhibits a tendency proportional to the total extension length L above. When the touch panel is used on the display screen, the sensing electrode and the driving electrode constituting the touch panel should be made of a transparent conductor, which is different in resistance from an opaque conductor. According to an embodiment of the present invention, the sensing electrode and the driving electrode of the touch panel should be made of a transparent conductor. If the resistance of the sensing electrode is too large, the operating characteristics may deteriorate. Therefore, it is desirable to keep the resistance of the sensing electrode small while allowing the sensing electrode to be capacitively coupled to the driving electrode-cells 11 to a sufficient size. In the case of using the topology described with reference to FIGS. 5A and 5B, the magnitude of the capacitive coupling between one sensing electrode and the driving electrode-cells 11 is proportional to the total extension length L according to an embodiment of the present invention. However, it is possible to obtain an advantageous effect that the resistance of this one sensing electrode tends to be proportional to the length L2 of the main electrode portion SS.

FIG. 5C is a view for explaining the vortex shape of one sensing electrode cell 21 according to an exemplary embodiment of the present invention, and the sensing electrode cell SB2 and its periphery shown in FIG. 5A are separately shown. FIG. 5C illustrates a straight line 131 connecting one end PS and the other end PE of the branch electrode part SB2. The first segment SB21 of the branch electrode part SB2 according to an embodiment of the present invention is present at one side of the straight line 131, and the second segment SB22 connected to the first segment SB21 is the straight line 131. On the other side.

In addition, the vortex shape of the sensing electrode-cell according to another embodiment of the present invention may be defined in other ways. The vortex shape of the sensing electrode-cell according to another embodiment of the present invention illustrated in FIG. 5D may be provided by the branch electrode part SB2 extending from one branch point PS of the main electrode part SS. In this case, the branch electrode part SB2 may include three or more straight segments SBS1 to SBS3 and two or more bent parts CN1 and CN2 defined between the segments. It is also to be understood that the shape which gave a slight curvature by modifying the three or more straight segments SBS1 to SBS3 is also within the scope of the present invention.

FIG. 6A illustrates only the sensing electrode-cell 21 of the touch node illustrated in FIG. 3A separately to explain the meaning of the 'swirl' shape used in the present invention. FIG. 6A illustrates a straight line 131 connecting one end PS and the other end PE of the sensing electrode cell 21 to each other. The first segment SB21 of the sensing electrode cell 21 according to an embodiment of the present invention is located at one side of the straight line 131, and the second segment SB22 connected to the first segment SB21 is a straight line ( 131 may be present on the other side.

FIG. 6B shows a sensing electrode-cell having a shape modified from the shape of the sensing electrode-cell 21 shown in FIG. 6A as another embodiment of the present invention. The swirl shape of the sensing electrode-cell according to FIG. 6B may also be defined in the same manner as in FIG. 6A. When the sensing electrode-cell has a shape as shown in FIG. 6B, the touch node may have a shape as shown in FIG. 6C.

Hereinafter, a touch panel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 3A, 4A, 5A, and 5D.

According to an exemplary embodiment of the present invention, a touch panel is a touch panel in which sensing electrodes C1 to C8 and driving electrodes R1 to R8 are formed on the same layer, and one sensing electrode extends in one direction. (SS); And N branch electrode parts SB1 to SB8 branched from N branch points of the main electrode part SS, and each of the branch electrode parts SB1 to SB8 has a spiral shape. The included driving electrode cell 11 extends in the extending direction of the branch electrode parts SB1 to SB8 and is formed in a spiral shape.

In this case, each of the branch electrodes ex SB2 includes a first segment SB21 and a second segment SB22 connected to each other, and the first segment SB21 has one end PS and the other end of the branch electrodes. (PE) is present in the first plane of the two planes divided by the imaginary line 131 extending in a straight line, and the second segment SB22 is present in the second plane of the two planes.

Alternatively, each of the branch electrode parts ex SB2 includes three or more straight segments SBS1, SBS2, and SBS3 connected to each other, and a predetermined angle between the three or more straight segments SBS1, SBS2, and SBS3. And bent (CN1, CN2). In this case, the constant angle may be a right angle.

In this case, the sensing wiring 12 connected to the sensing electrode and the driving wiring 22 connected to the driving electrode are the same as the sensing electrode and the driving electrode in the sensing region in which the sensing electrode and the driving electrode are disposed. May be placed in the layer.

A touch panel according to another embodiment of the present invention is a touch panel in which a plurality of touch nodes including a sensing electrode cell 21 and a driving electrode cell 11 formed on the same layer are arranged in a matrix form, each of which is a touch panel. The sensing electrode-cell includes a first segment and a second segment connected to each other, wherein the first segment is divided into two planes divided by an imaginary line extending straightly at one end and the other end of the sensing electrode-cell. A plurality of the sensing electrode-cells in the first plane, the second segment in the second plane of the two planes, and belonging to the same sensing electrode are connected to each other through the one end.

A touch panel according to another embodiment of the present invention is a touch panel in which first type electrodes C1 to C8 and second type electrodes R1 to R8 are formed on the same layer. The electrode may include a main electrode part SS extending in one direction; And N branch electrode parts SB1 to SB8 branched from N branch points of the main electrode part, each branch electrode part having a swirl shape, and a driving electrode cell included in the driving electrode includes It may extend in the extending direction of the branch electrode part to form a swirl.

In the present specification, a plurality of sensing electrodes-cells belonging to one sensing electrode are directly connected in the sensing region described above, and the plurality of driving electrodes-cells 11 belonging to one driving electrode are connected outside the sensing region described above. An example has been described. However, it may be understood that the above-described embodiment may be modified accordingly because other embodiments may have the reverse structure.

Although the present invention has been described in connection with the preferred embodiment, those skilled in the art will be able to easily make various changes and modifications without departing from the essential characteristics of the present invention.

Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation, and the true scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope are included in the present invention. Should be interpreted as.

Claims

A touch panel in which a sensing electrode and a driving electrode are formed on the same layer,

One sensing electrode may include a main electrode part extending in one direction; And N branch electrode parts branched from N branch points of the main electrode part,

Each branch electrode part has a swirl shape,

The driving electrode-cell included in the driving electrode extends in the extending direction of the branch electrode part and is formed in a spiral shape.

Touch panel.
The method of claim 1,

Each branch electrode part includes a first segment and a second segment connected to each other,

The first segment is present in a first plane of two planes divided by an imaginary line extending one end and the other end of the branch electrode in a straight line,

The second segment is in a second of the two planes,

Touch panel.
The touch panel as set forth in claim 1, wherein each of the branch electrode parts includes three or more linear segments connected to each other, and the three or more linear segments are bent at a predetermined angle.
The touch panel of claim 3, wherein the constant angle is perpendicular.
The sensing wiring of claim 1, wherein the sensing wiring connected to the sensing electrode and the driving wiring connected to the driving electrode are formed on the same layer as the sensing electrode and the driving electrode in the sensing region in which the sensing electrode and the driving electrode are disposed. The touch panel which is arranged.
A touch panel in which a plurality of touch nodes including a sensing electrode cell and a driving electrode cell formed on the same layer are arranged in a matrix form,

Each sensing electrode cell includes a first segment and a second segment connected to each other.

The first segment is in a first plane of two planes divided by an imaginary line extending straightly at one end and the other end of the sensing electrode-cell,

The second segment is in a second of the two planes,

The plurality of sensing electrode-cells belonging to the same sensing electrode are connected to each other through the one end,

Touch panel.
The sensing electrode of claim 6, wherein the sensing wiring connected to the sensing electrode cell and the driving wiring connected to the driving electrode cell comprise the sensing electrode in the sensing region in which the sensing electrode cell and the driving electrode cell are disposed. A touch panel disposed on the same layer as the cell and the drive electrode cell.
A touch panel in which a first type electrode and a second type electrode are formed on the same layer,

One of the first type-electrodes includes: a main electrode part extending in one direction; And N branch electrode parts branched from N branch points of the main electrode part,

Each branch electrode part has a swirl shape,

The driving electrode-cell included in the driving electrode extends in the extending direction of the branch electrode part and is formed in a spiral shape.

Touch panel.
9. The method of claim 8, wherein the first type-wiring connected to the first type-electrode and the second type-wiring connected to the second type-electrode are the first type-electrode and the second type-electrode. And a touch panel disposed in the same layer as the first type electrode and the second type electrode in the disposed sensing region.
The touch panel of claim 9, wherein the first type electrode is a sensing electrode, the second type electrode is a driving electrode, the first type wiring is a sensing wiring, and the second type wiring is a driving wiring. .