KR20200109644A - Circular touch panel and manufacturing method of the same - Google Patents

Abstract

A circular touch panel of the present invention comprises: a circular substrate; and an x-type electrode pattern and a y-type electrode pattern stacked on the circular substrate, wherein the x-type electrode pattern is extended from the outer periphery of the circular substrate to the center in a spiral that rotates in a first direction, and the y-type electrode pattern is extended from the outer periphery of the circular substrate to the center in a spiral that rotates in a second rotation direction opposite to the first direction. Therefore, coordinate detection performance can be improved.

Description

Circular touch panel and its manufacturing method {CIRCULAR TOUCH PANEL AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to a shape and arrangement of a sensor pattern (electrode pattern) of a circular touch panel.

The sensing methods used for touch screens are mainly resistive, ultrasonic/infrared, and capacitive, and among them, the capacitive method has strengths in durability and visibility, so it is adopted as the main input method of portable mobile devices. There is a trend.

Capacitive touch screen recognizes user input by sensing that the amount of charge charged to capacitive sensors on the touch screen panel changes due to user contact, and self-capacitive method according to charge storage method And mutual capacitance method (mutual-capacitive). The self-capacitance method constitutes one conductor per capacitive sensor to form a charging surface with a reference ground outside the touch screen panel.

A conventional circular touch screen panel detects a user's touch by forming hexagonal or rectangular touch sensing electrodes on a transparent circular substrate. According to the circular touch screen panel according to the prior art, a region in which a hexagon or a square pattern cannot be formed in the vicinity of the circle and thus a touch cannot be sensed is distributed.

In the case of an interdigitated pattern for sensing a touch of a circular circumference, there is a limit of the coordinate detection performance because the pattern does not cross two sensors like a rectangular touch panel, and the conductor connecting the sensor is between the patterns. Because it is located at, there is a problem that the accuracy of measuring the capacitance is poor.

An object of the present invention for solving the above-described problems is to provide a circular touch panel capable of improving coordinate detection performance by crossing two sensors and applying a spiral pattern in consideration of circular characteristics.

A circular touch panel according to an aspect of the present invention for achieving the above object includes: a circular substrate; And an x-system electrode pattern and a y-system electrode pattern stacked on the circular substrate, wherein the x-system electrode pattern extends from the outer periphery of the circular substrate in a spiral rotating in a first direction, and the y The system electrode pattern extends from the outer periphery of the circular substrate to the center in a spiral rotating in a second rotation direction opposite to the first direction.

A method of manufacturing a circular touch panel according to another aspect of the present invention comprises: preparing a circular substrate; Depositing an electrode layer over the entire surface of the circular substrate; And forming an x system electrode pattern and a y system electrode pattern by patterning the electrode layer, wherein the x system electrode pattern extends from the outer periphery of the circular substrate in a spiral rotating in a first direction. The y-type electrode pattern extends from the outer periphery of the circular substrate to the center in a spiral rotating in a second rotation direction opposite to the first direction.

According to the present invention, since two systems of sensors cross each other, the coordinate detection performance is improved by combining the measured values of the sensors of the two systems and the measured values of the sensors of the same series.

In addition, since the pattern is formed in a spiral shape in consideration of the characteristics of the circular shape of the two system sensors, it is possible to detect the coordinates of the outer angle of the circle.

In addition, since the wire connecting the sensor exists only outside the circular substrate, interference between the sensor and the sensor wiring is minimized.

1 is a diagram showing a stacked structure of a circular display device to which a circular touch panel of the present invention can be applied.
2 is a view showing a circular touch panel according to an embodiment of the present invention.
3 is an enlarged view of an enlarged area A shown in FIG. 2.
4 is a view for explaining a method of determining an arrangement position of an electrode on a circular substrate according to an embodiment of the present invention.
5 is a diagram illustrating a concept of detecting touch coordinates using a circular touch panel according to the present invention.

Hereinafter, various embodiments of the present invention will be described in connection with the accompanying drawings. Various embodiments of the present invention may be modified in various ways and may have various embodiments, and specific embodiments are illustrated in the drawings and related detailed descriptions are described. However, this is not intended to limit the various embodiments of the present invention to specific embodiments, it should be understood to include all changes and/or equivalents or substitutes included in the spirit and scope of the various embodiments of the present invention. In connection with the description of the drawings, similar reference numerals have been used for similar elements.

Expressions such as "first," "second," "first," or "second," used in various embodiments of the present invention may modify various elements of various embodiments, but do not limit the corresponding elements. Does not. For example, the expressions do not limit the order and/or importance of corresponding elements. The above expressions may be used to distinguish one component from another component. For example, a first user device and a second user device are both user devices and represent different user devices. For example, without departing from the scope of the rights of various embodiments of the present invention, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

The terms used in the embodiments of the present invention are used only to describe specific embodiments, and are not intended to limit the embodiments of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which an embodiment of the present invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in various embodiments of the present invention, ideal or excessively formal It is not interpreted in meaning.

1 is a diagram illustrating a stacked structure of a circular display device to which a circular touch panel of the present invention can be applied.

Referring to FIG. 1, a circular display device 10 according to an exemplary embodiment of the present invention has a structure in which a window 100, a circular touch panel 200, a polarizing plate 300, and a circular display panel 400 are stacked. Can be configured.

In this embodiment, the circular touch panel 200 and the circular display panel 400 are separately formed. However, the circular touch panel 200 and the circular display panel 400 are on-cell and in-cell ( It may be integrally formed in an in-cell) method or the like.

The circular display panel 400 includes a plurality of pixels PX, and the plurality of pixels PX emit light corresponding to gray levels of an input image. The circular display panel 400 may be an organic light emitting display panel including a plurality of organic light emitting diodes (OLEDs), or may be a liquid crystal display panel having a liquid crystal layer interposed therebetween. The present invention relates to the characteristics of the circular touch panel 200 and the scope of rights is not limited due to the type of the circular display panel 400.

The window 100 is made of glass or synthetic resin for protecting the circular display device 10 and may be attached through an adhesive layer (not shown).

In FIG. 1, although the circular touch panel 200 is shown to be attached in contact with the window 100, the positions of the polarizing plate 300 and the circular touch panel 200 may be changed, and depending on the type of display device, the polarizing plate The configuration of 300 may be excluded.

The polarizing plate 300 illustrated in FIG. 1 may be a circular polarizing plate, and in this case, the circular display panel 400 may be an organic light emitting display panel. That is, the organic light emitting display device generally includes a polarizer such as a circular flat tube plate to prevent a reduction in contrast ratio due to reflection of external light.

However, when the circular display panel 400 is a liquid crystal panel, linear polarizing plates having polarization axes that are 90 degrees to each other may be disposed below and above the circular display panel 400. The type and number of such polarizers may vary depending on the mode of the liquid crystal display panel. Therefore, in the present invention, the scope of rights is not limited according to the type and location of the polarizer 300.

FIG. 2 is a diagram illustrating a circular touch panel according to an exemplary embodiment of the present invention, and FIG. 3 is an enlarged view of an area A shown in FIG. 2.

Referring to FIG. 2, a circular touch panel 200 according to an embodiment of the present invention includes a circular substrate (or insulating substrate) 210 and two electrode patterns (or sensors) stacked on the circular substrate 210. Patterns) ([x0, x1, x2 and x3], [y0, y1, y2 and y3]) and a bridge electrode 220 electrically connecting the sensing electrode pattern of any one of the two sensing electrode patterns Includes.

Although not shown, the circular touch panel 200 further includes a plurality of connection wires stacked on the circular substrate 210. A feature of the present invention is the arrangement of the sensor pattern consisting of two systems, and thus a plurality of connection wirings are not shown in the drawings. However, a plurality of connection wires are generally formed to surround the outer periphery of the circular substrate 210.

Accordingly, a plurality of connection wires are formed outside the circular substrate 210 to electrically connect two sensor patterns and a signal processing unit (not shown) for processing a touch signal.

The electrodes (sensors) constituting each of the two system electrode patterns to be described below are connected to each other for each group so as to measure capacitance, and are connected to a signal processing unit (not shown). The memory in the signal processing unit may store a table necessary for a coordinate detection logic and a coordinate transformation according to a sensor measurement and a measurement size ratio between two system electrodes (sensors).

2 system electrode patterns ([x0, x1, x2 and x3], [y0, y1, y2 and y3]) are the x system sensor patterns [x0, x1, x2 and x3] and the y system electrode patterns [y0, y1, y2 and y3].

The x-type electrode patterns (x0, x1, x2, and x3) are formed in a spiral pattern rotating in the first direction on the circular substrate 210, and the y-type electrode patterns (y0, y1, y2, and y3) are circular substrates. (210) It is formed in a spiral pattern rotating in a second direction opposite to the first direction. Here, the first direction may be a clockwise direction, and the second direction may be a counterclockwise direction. That is, the x system electrode patterns (x0, x1, x2 and x3) and the y system electrode patterns (y0, y1, y2 and y3) are arranged in a spiral rotating in opposite directions on the circular substrate 210, It forms an intersecting shape.

The x system electrode patterns (x0, x1, x2, and x3) are the 1-1 electrode pattern (x0), the 1-2 electrode pattern (x1), the 1-3 electrode pattern (x2), and the 1-4 electrode. Includes the pattern (x3).

The 1-1th electrode pattern x0 is a plurality of electrodes (or a plurality of sensors) disposed in a spiral structure rotating clockwise from the outermost portion toward the 12 o'clock direction of the circular substrate 210 to the center direction (x0a, x0b, x0c, x0d, ...). Specifically, the 1-1 electrode pattern (x0), when dividing the circular substrate 210 into quadrants, among a plurality of electrodes (x0a, x0b, x0c, x0d, ...) in the 12 o'clock direction within the first quadrant. Using the outermost electrode (x0a) as a starting electrode, the electrode (x0a) and the remaining electrodes (x0b, x0c, x0d, …) disposed while rotating clockwise from the outer to the center of the circular substrate 210 It consists of a connected structure.

The 1-2th electrode pattern x1 is a plurality of electrodes x1a, x1b, x1c, x1d, ... arranged in a spiral structure rotating clockwise from the outermost side of the circular substrate 210 in the direction of 3 o'clock. ). Specifically, the 1-2 electrode pattern x1 uses the electrode x1a disposed at the outermost part of the 2nd quadrant at the 3 o'clock direction as a starting electrode, and at the outer edge of the electrode x1a and the circular substrate 210 The remaining electrodes (x1b, x1c, x1d, …) disposed while rotating clockwise toward the center are connected to each other.

The 1-3 electrode pattern x2 is a plurality of electrodes (x2a, x2b, x2c, x2d, ...) arranged in a spiral structure rotating clockwise from the outermost portion toward the 6 o'clock direction of the circular substrate 210 in a clockwise direction. ). Specifically, the 1-3 electrode pattern (x2) uses the electrode (x2a) disposed at the outermost part at 6 o'clock in the third quadrant as a starting electrode, and the electrode (x2a) and the outer edge of the circular substrate 210 The remaining electrodes (x2b, x2c, x2d, …) disposed while rotating clockwise toward the center are connected to each other.

The 1-4th electrode pattern (x3) is a plurality of electrodes (x3a, x3b, x3c, x3d, ...) arranged in a spiral structure rotating clockwise from the outermost part of the circular substrate 210 in the direction of 9 o'clock. ). Specifically, the 1-4th electrode pattern (x3) uses the electrode (x3a) disposed at the outermost part at 9 o'clock in the fourth quadrant as a starting electrode, and the electrode (x3a) and the outer edge of the circular substrate 210 The remaining electrodes (x3b, x3c, x3d, …) disposed while rotating clockwise toward the center are connected to each other.

The y-type electrode patterns (y0, y1, y2, and y3) are the 2-1 electrode pattern (y0), the 2-2 electrode pattern (y1), the 2-3 electrode pattern (y2), and the 2-4 electrode. It includes a pattern (y3).

The 2-1 electrode pattern y0 includes a plurality of electrodes y0a, y0b, y0c, y0d arranged in a spiral structure rotating in a counterclockwise direction from the outermost part toward the 12 o'clock direction of the circular substrate 210, …). Specifically, when dividing the circular substrate 210 into quadrants, the 2-1 electrode pattern y0 is in the 12 o'clock direction within the 4 quadrants among a plurality of electrodes (y0a, y0b, y0c, y0d, ...). Using the outermost electrode y0a as a starting electrode, the electrode y0a and the remaining electrodes y0b, y0c, y0d,… disposed while rotating clockwise from the outer edge of the circular substrate 210 toward the center It consists of a connected structure.

The 2-2nd electrode pattern y1 includes a plurality of electrodes y1a, y1b, y1c, y1d arranged in a spiral structure rotating counterclockwise from the outermost portion of the circular substrate 210 toward the center toward the center at 9 o'clock. …). Specifically, when dividing the circular substrate 210 into quadrants, the 2-2 electrode pattern y1 is in the direction of 9 o'clock in the three quadrants among the plurality of electrodes y1a, y1b, y1c, y1d, ... Using the outermost electrode y1a as a starting electrode, the electrode y1a and the remaining electrodes y1b, y1c, y1d,… disposed while rotating counterclockwise from the outer to the center toward the center of the circular substrate 210. ) Consists of a connected structure.

The 2-3rd electrode pattern y2 includes a plurality of electrodes y2a, y2b, y2c, y2d arranged in a spiral structure rotating in a counterclockwise direction from the outermost portion of the circular substrate 210 toward the center at 6 o'clock. …). Specifically, when dividing the circular substrate 210 into quadrants, the 2-3 electrode pattern y2 is in the direction of 6 o'clock in the second quadrant among the plurality of electrodes y1a, y1b, y1c, y1d, ... Using the outermost electrode y2a as a starting electrode, the electrode y2a and the remaining electrodes y2b, y2c, y2d,… disposed while rotating counterclockwise from the outer to the center toward the center of the circular substrate 210. ) Consists of a connected structure.

The 2-4th electrode pattern y3 includes a plurality of electrodes y2a, y2b, y2c, y2d arranged in a spiral structure rotating in a counterclockwise direction from the outermost portion of the circular substrate 210 in the direction of 3 o'clock. …). Specifically, when dividing the circular substrate 210 into quadrants, the 2-4 electrode pattern y3 is in the 3 o'clock direction within the first quadrant among a plurality of electrodes (y3a, y3b, y3c, y3d, ...). Using the outermost electrode y3a as a starting electrode, the electrode y3a and the remaining electrodes y3b, y3c, y3d,… disposed while rotating counterclockwise from the outer to the center toward the center of the circular substrate 210. ) Consists of a connected structure.

The x-based electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) forming the x-based electrode pattern and the y-based electrode constituting the y-based electrode pattern The s (y0a, y0b,…, y1a, y1b,… y2a, y2b, …, y3a, y3b, …) can be driven in a manner of forming mutual-capacitance. x-type electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) and y-type electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b) Each of, …, y3a, y3b, …) may be implemented as a transparent electrode such as indium tin oxide (TO).

In this embodiment, the x-type electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) are in a spiral shape rotating in a first direction (eg, clockwise). Each of the electrodes of the y system (y0a, y0b,…, y1a, y1b,… y2a, y2b, …, y3a, y3b, …) is formed by extending integrally, respectively, the x-based electrodes (x0a, x0b, …). , x1a, x1b,… x2a, x2b, …, x3a, x3b, …) may be formed in an island shape for electrical insulation.

Therefore, the y-type electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b, …, y3a, y3b, …) extend in a spiral shape rotating in the second direction (eg, counterclockwise). In order to be, as shown in FIG. 3, it may be connected by a bridge electrode 220.

Although not shown in order to prevent the bridge electrode 220 from being electrically connected to the x-based electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …), x An insulator 230 may be interposed between the system electrodes x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b,… and the bridge electrode 220.

The insulator 230 is a via hole so that the bridge electrode 220 connects the island-shaped y-type electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b, …, y3a, y3b, …) to each other. It can be patterned to have a (via hole). In this case, depending on the type of the circular touch panel 200, the insulator itself may be patterned in an island shape, which may vary depending on the product design. At least one patterning process is required both when the insulator 230 is patterned in an island shape and when patterned to have a via hole.

x-system electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) and y-system electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b) , …, y3a, y3b, …) each may have a shape whose width becomes narrower when extending from one end to the other.

One end of each of the electrodes has a certain width, but the other end has a pointed shape. It can have the shape of a bird's beak.

In this way, by forming the electrodes to have a bird's beak shape, the x-type electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) and y-type Even if the electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b, …, y3a, y3b, …) are arranged in a spiral structure rotating in opposite directions, they can be densely disposed over the entire surface of the circular substrate.

x-type electrodes (x0a, x0b,…, x1a, x1b,… x2a, x2b, …, x3a, x3b, …) and y-type electrodes (y0a, y0b,…, y1a, y1b,… y2a, y2b) , …, y3a, y3b, …) each size may be formed to be smaller from the outer periphery of the circular substrate 210 toward the center. By doing so, it is possible to improve the performance of detecting coordinates on the outer side of the circle.

In this embodiment, the electrodes (x0a/y0a, x1a/y1a, x2a/y2a, x3a/y3a) serving as start electrodes are at the outermost edge of the circular substrate 210 at 12 o'clock, 3 o'clock, and 6 o'clock. And 9 o'clock. That is, the starting points of the xy system electrode patterns are formed at 90 degree intervals.

The number of electrode patterns, that is, the resolution of touch coordinates, can be increased by adjusting the angular spacing between the electrodes x0a/y0a, x1a/y1a, x2a/y2a, and x3a/y3a disposed at the starting point. For example, the number of electrodes (number or resolution of sensors) may be increased by configuring the angular interval of electrodes disposed at the starting point to be 60 degrees or 45 degrees.

4 is a view for explaining a method of determining an arrangement position of an electrode on a circular substrate according to an exemplary embodiment of the present invention.

)와 원형 기판의 중심으로부터 거리(

))는 아래의 수학식 1에 의해 결정될 수 있다.Referring to FIG. 4, among the electrodes constituting the y-type electrode pattern, the 2-4th electrode pattern y3 rotates counterclockwise from the outermost part of the circular substrate 210 toward the 3 o'clock direction toward the center. Assuming that the electrodes y3a, y3b, y3c, y3d,… are arranged along the spiral line 40, the electrodes y23a, y3b, y3c, y3d,… are arranged on a circular substrate. Position (angle(

) And the distance from the center of the circular substrate (

)) can be determined by Equation 1 below.

)는 원형 기판(210)의 중심(C)과 제2-4 전극 패턴(y3) 내에서 시작점으로 선정된 첫 번째 전극(y3a)을 연결하는 직선(L1)과 원형 기판(210)의 중심(C)과 제2-4 전극 패턴(y3)내에서 두 번째 전극(y3b)을 연결하는 직선(L2) 사이의 각도이고,

은 원형 기판(210)의 중심(C)으로부터 두 번째 전극(y3b)까지의 거리이고,

은

를 변수로 하는 거리 함수를 나타낸다. 수학식 1은 1회전의 나선을 표현한다.Where A is the radius of the circular substrate, and the angle (

) Is a straight line L1 connecting the center C of the circular substrate 210 and the first electrode y3a selected as a starting point in the 2-4 electrode pattern y3 and the center of the circular substrate 210 ( C) is the angle between the straight line L2 connecting the second electrode y3b in the 2-4th electrode pattern y3,

Is the distance from the center (C) of the circular substrate 210 to the second electrode (y3b),

silver

It represents a distance function using as a variable. Equation 1 represents a spiral of one rotation.

5 is a diagram illustrating a concept of detecting touch coordinates using a circular touch panel according to the present invention.

In order to help understand the detection concept, in FIG. 5, it is assumed that a circular touch panel in which an x-type electrode pattern consisting only of an x0 electrode pattern and an x1 electrode pattern, and a y-type electrode pattern consisting of only y1 and y2 electrode patterns crosses. do.

When the x-type electrode pattern and the y-type electrode pattern are separated, it can be represented by (A) and (B), respectively, and the spiral structure of (A) and (B) can be represented by (D) and (E). .

The combined structure of (A) and (B) can be represented by (C), and the combined structure of (D) and (E) can be represented by (D).

Referring to (D), when a touch detection for an x0 electrode pattern is detected, touch coordinates of P1, P2, and P3 may be detected according to detection of the touch detection for the y1 electrode pattern, y2 electrode pattern, and y3 electrode pattern. have.

In addition, when a touch detection is detected between the y2 electrode pattern and the y3 electrode pattern, y2 electrode (y2 sensor) and y3 electrode (y3 sensor) according to the size ratio of y2 electrode (or y2 sensor) and y3 electrode (y3 sensor) You can determine the coordinates by calculating the coordinates between them.

Similarly, even when a touch detection is detected between two different x0 and x1, coordinates may be determined according to a ratio of the electrode (sensor) size of x0 and x1.

As described above, the circular touch panel according to the present invention crosses two electrode patterns (two touch sensor patterns) and detects the coordinates of the circular touch panel by applying a spiral finger pattern reflecting the shape characteristics of the circular substrate. Performance (for example, coordinate detection performance in the outer area of a circular substrate) can be improved.

Meanwhile, a method of manufacturing a circular touch panel according to an embodiment of the present invention includes preparing a circular substrate, depositing an electrode layer over the entire surface of the circular substrate, and

By patterning the electrode layer, it may be configured to include forming an x-type electrode pattern and a y-type electrode pattern. Here, the x-system electrode pattern is a spiral rotating in a first direction and extends from the outer edge of the circular substrate to the center, and the y-system electrode pattern is rotated in a second rotation direction opposite to the first direction. It spirally extends from the outer periphery of the circular substrate to the center. The material of the electrode layer may be ITO (Indium Tin Oxide).

Prior to depositing the electrode layer, a step of depositing a metal layer for forming a plurality of connection wires, not shown in the drawing, on the entire surface of the circular substrate may be performed. The metal layer may be an opaque metal, and may be composed of a single or complex material such as Ag, Cu, Cr, Al, Mo/Al/Mo. A metal layer for forming a plurality of connection wires may be patterned using a mask to form a plurality of connection wires. In this case, the connection wiring may be formed in an outer region of the circular substrate.

After the x-type electrode pattern and the y-type electrode pattern are formed, the insulator 230 may be stacked. The insulator 230 may be configured to be transparent. Thereafter, another metal layer may be deposited and patterned to form the bridge electrode 220.

In the method of manufacturing a circular touch panel according to another embodiment of the present invention, the forming step includes a plurality of electrode patterns extending in a spiral rotating in the first direction, wherein the y It may include the step of patterning the electrode layer so that the system electrode pattern includes a plurality of electrode patterns that are spirally stacked rotating in the second direction.

In a method of manufacturing a circular touch panel according to another exemplary embodiment of the present invention, each of the plurality of electrode patterns extends from a different location on the outer side of the circular substrate as a starting point.

In the method of manufacturing a circular touch panel according to another embodiment of the present invention, the forming step includes a start electrode and the first direction each of the plurality of electrode patterns starting at an arbitrary point outside the circular substrate as a starting point. Alternatively, it may be a step of patterning the electrode layer to have a structure in which the remaining electrodes arranged in a spiral rotating in the second direction are connected.

In a method of manufacturing a circular touch panel according to another embodiment of the present invention, a plurality of electrodes included in any one of the x-type electrode patterns and the y-type electrode patterns are converted into a plurality of bridge electrodes 220. It may further include the step of connecting. In this case, the plurality of bridge electrodes are arranged in a spiral shape rotating in the first direction or the second direction on the circular substrate.

In the above, the present invention has been described centering on the embodiments, but these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention pertains will not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications that are not illustrated in are possible. For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (14)

Circular substrate; And
Including an x-system electrode pattern and a y-system electrode pattern stacked on the circular substrate,
The x-type electrode pattern is a spiral rotating in a first direction and extends from the outer periphery of the circular substrate to the center,
The y-type electrode pattern is a circular touch panel extending from an outer periphery of the circular substrate to a center in a spiral rotating in a second rotation direction opposite to the first direction. In claim 1,
The x-system electrode pattern includes a plurality of electrode patterns stacked in a spiral rotating in the first direction,
The y-type electrode pattern includes a plurality of electrode patterns stacked in a spiral rotating in the second direction. In paragraph 2,
Each of the plurality of electrode patterns,
A circular touch panel that extends from an outer periphery of the circular substrate from different positions as a starting point. In paragraph 2,
Each of the plurality of electrode patterns,
A circular touch panel having a structure in which a start electrode having an outer portion of the circular substrate as a starting point and remaining electrodes arranged in a spiral rotating in the first direction or the second direction are connected. In claim 4,
According to the angular interval formed by the start electrode included in any one electrode pattern among the plurality of electrode patterns and the start electrode included in another electrode pattern adjacent to the one electrode pattern, the x-based electrode pattern and The circular touch panel in which the number of electrodes included in each of the y-type electrode patterns is determined. In claim 1,
The x system electrode pattern includes a plurality of electrodes stacked in a spiral rotating in the first direction, the y system electrode pattern includes a plurality of electrodes stacked in a spiral rotating in the second direction,
The position where the plurality of electrodes are disposed on the circular substrate is determined by Equation 1 below,
Equation 1 above,

,

0

ego,
Wherein A is the radius of the circular substrate, and

Is an angle formed between a first electrode disposed on the outer edge of a circular substrate within each electrode pattern and a second electrode after the first electrode,

Is the distance from the center of the circular substrate to the second electrode,

silver

A circular touch panel that is a distance function using as a variable. The method of claim 1, wherein the x-type electrode pattern includes a plurality of electrodes stacked in a spiral rotating in the first direction, and the y-type electrode pattern is stacked in a spiral rotating in the second direction. Including an electrode,
Each of the plurality of electrodes,
A circular touch panel in the shape of a bird's beak. Preparing a circular substrate;
Depositing an electrode layer over the entire surface of the circular substrate;
Including the step of patterning the electrode layer to form an x-based electrode pattern and a y-based electrode pattern,
The x-system electrode pattern extends from the outer periphery of the circular substrate to the center in a spiral rotating in a first direction,
The method of manufacturing a circular touch panel, wherein the y-type electrode pattern extends from an outer periphery of the circular substrate to a center in a spiral rotating in a second rotation direction opposite to the first direction. In clause 8,
The forming step,
The x-type electrode pattern includes a plurality of electrode patterns extending in a spiral rotating in the first direction, and the y-type electrode pattern includes a plurality of electrode patterns extending in a spiral rotating in the second direction The method of manufacturing a circular touch panel is a step of patterning the electrode layer so that it is. In claim 9,
Each of the plurality of electrode patterns,
A method of manufacturing a circular touch panel, wherein the circular touch panel is extended from the outer edge of the circular substrate to different positions as a starting point. In claim 9,
The forming step,
The electrode layer is patterned so that each of the plurality of electrode patterns has a structure in which a start electrode having an arbitrary point on the outer side of the circular substrate as a starting point and the remaining electrodes arranged in a spiral rotating in the first or second direction The method of manufacturing a circular touch panel that is a step of. In clause 8,
The x-system electrode pattern includes a plurality of electrodes patterned in a spiral rotating in the first direction, the y-system electrode pattern includes a plurality of electrodes patterned in a spirally rotating in the second direction,
The method of manufacturing a circular touch panel further comprising the step of connecting a plurality of electrodes included in any one of the x-type electrode patterns and the y-type electrode patterns with a plurality of bridge electrodes. In claim 12,
The method of manufacturing a circular touch panel, wherein the plurality of bridge electrodes are arranged in a spiral shape rotating in the first direction or the second direction on the circular substrate. In clause 8,
The x-system electrode pattern includes a plurality of electrodes patterned in a spiral rotating in the first direction, the y-system electrode pattern includes a plurality of electrodes patterned in a spirally rotating in the second direction,
The position at which the plurality of electrodes are disposed on the circular substrate is determined by Equation 1 below,
Equation 1 above,

,

0

ego,
Wherein A is the radius of the circular substrate, and

Is an angle formed between a first electrode disposed on the outer edge of a circular substrate within each electrode pattern and a second electrode after the first electrode,

Is the distance from the center of the circular substrate to the second electrode,

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A method of manufacturing a circular touch panel that is a distance function using as a variable.

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