KR20220006980A - Touch sensor and touch input device thereof - Google Patents

Abstract

The present invention relates to a touch sensor and a touch input device and, more particularly, to a touch sensor formed of a circular single layer and a touch input device including the same. According to an embodiment of the present invention, the touch input device comprises a circular touch sensor. The touch sensor includes a plurality of electrodes disposed on a single layer and spaced apart from each other on a plurality of virtual circles having a common center.

Description

TOUCH SENSOR AND TOUCH INPUT DEVICE THEREOF

The present invention relates to a touch sensor and a touch input device, and more particularly, to a circular touch sensor and a touch input device including the same.

Various types of touch input devices are used to operate a computing system. For example, input devices such as buttons, keys, joysticks, and touch screens are being used. Due to the easy and convenient operation of the touch screen, the use of the touch screen is increasing when operating a computing system.

With the development of technology, the development of a wearable computer is accelerating. A wearable computer refers to a computer that can be worn on the body naturally, such as clothes, watches, glasses, and accessories.

Smartphones and tablet PCs can be conveniently used with just one finger or a touch pen, but there may be inconveniences that you have to carry in your pocket or bag or carry around in your hand.

On the other hand, wearable computers can be worn on the wrist or worn like glasses, so they can be more portable than smartphones or tablet PCs. In particular, as a type of wearable computer and a type of touch input device, various products for a wrist watch, that is, a smart watch, which can search various services such as a diary, a message, a notification, and a stock price wirelessly, are appearing. In particular, there are products having a circular touch screen among conventional smart watches. An example will be described with reference to FIG. 1 .

1 is a perspective view of an example of a conventional smart watch, and FIG. 2 is a view showing a pattern structure of a touch sensor included in the smart watch shown in FIG. 1 .

The smart watch 100 shown in FIG. 1 may include a touch sensor 150 having a pattern as shown in FIG. 2 .

In the pattern of the touch sensor 150 shown in FIG. 2, driving electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 are arranged in a single layer along the column direction, The receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 are disposed along the direction. In this way, the touch sensor 150 shown in FIG. 2 includes driving electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 and receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 are arranged to be orthogonal to each other (hereinafter, 'orthogonal pattern').

In the conventional touch sensor 150 having an orthogonal pattern structure shown in FIG. 2, touch electrodes (hereinafter, referred to as 'distorted electrodes') that do not have a complete rhombic shape are disposed on the edge of the touch sensor 150. Therefore, there is a problem in that the touch sensing performance is deteriorated at the edge portion where the distortion electrodes are located. In particular, when a sliding touch (hereinafter, 'wheel touch') is performed on the edge of the touch sensor 150 in a clockwise or counterclockwise direction, a problem occurs in that the sensing signal is weakened or disappears. There is a problem that the function does not run.

In addition, since the shape of the touch electrodes located in the center of the touch sensor 150 and the shape of the distortion electrodes are different, when the touch sensor 150 is driven in a mutual mode, the distance between the adjacent driving electrode and the receiving electrode is different. Mutual capacitance change amount (Cm) is not uniform.

In addition, when the touch sensor 150 is driven in a self mode that senses a self-capacitance change amount (self cap) by supplying a driving signal to both the driving electrodes and the receiving electrodes, the central portion of the touch sensor 150 Since the shape of the touch electrodes positioned at , and the shape of the distortion electrodes are different, there is also a problem that the self-capacitance change amount (Cs) of all the electrodes is not the same.

In addition, it is important for the smart watch to have power consumption characteristics that can be used continuously without charging for a long time by reducing power consumption, in particular, there is a problem in that unnecessary power consumption for driving the distorted electrodes of the touch sensor 150 is generated.

An object of the present invention is to provide a touch sensor capable of improving touch sensing performance of an edge of a circular touch sensor and a touch input device including the same.

In addition, the problem to be solved by the present invention is a touch sensor having a uniform mutual capacitance change amount (Cm) and/or self-capacitance change amount (Cs) in each electrode in a circular touch sensor and a touch input device including the same to provide.

Another object of the present invention is to provide a touch sensor capable of reducing power consumption of a circular touch sensor and a touch input device including the same.

In addition, there is provided a touch sensor capable of sensing whether a touch is made in the center of a circular touch sensor, and a touch input device including the same.

In addition, a touch sensor capable of providing a routing method and a trace connection structure in a circular touch sensor, and a touch input device including the same are provided.

A touch input device according to an embodiment of the present invention includes a circular touch sensor, wherein the touch sensor is disposed on a single layer and arranged at a predetermined distance in a plurality of rings or a plurality of rings having a common center. It includes a plurality of electrodes.

Here, a circular electrode may be further disposed in the center of the touch sensor.

A touch input device according to another embodiment of the present invention includes a circular touch sensor, wherein the touch sensor includes a plurality of electrodes disposed on a single layer and spaced apart from each other on a plurality of virtual circles having a common center. include

A touch sensor according to an embodiment of the present invention includes a plurality of first electrodes and a plurality of second electrodes, wherein the plurality of first electrodes include: first electrodes of a first group; a second group of first electrodes surrounding the first group of electrodes; a third group of first electrodes surrounding the second group of first electrodes; and a fourth group of first electrodes surrounding the third group of first electrodes, wherein the plurality of second electrodes includes the first electrode of the first group and the first electrode of the second group one or more 2-0 electrodes disposed between them; a plurality of 2-1 electrodes, a plurality of 2-2 electrodes, and a plurality of second-3 electrodes disposed between the first electrodes of the second group and the first electrodes of the third group; and a plurality of second-4 electrodes, a plurality of second-5 electrodes, a plurality of second-6 electrodes disposed between the first electrodes of the third group and the first electrodes of the fourth group; and a plurality of second to seventh electrodes;

A touch sensor according to another embodiment of the present invention includes a plurality of first electrodes and a plurality of second electrodes, wherein the plurality of first electrodes include: first electrodes of a first group; a second group of first electrodes surrounding the first group of electrodes; a third group of first electrodes surrounding the second group of first electrodes; and a fourth group of first electrodes surrounding the third group of first electrodes, wherein the plurality of second electrodes includes the first electrode of the first group and the first electrode of the second group one or more 2-0 electrodes disposed between them; a plurality of 2-1 electrodes and a plurality of 2-2 electrodes disposed between the first electrodes of the second group and the first electrodes of the third group; and a plurality of second-3 electrodes, a plurality of second-4 electrodes, and a plurality of second-5 electrodes disposed between the first electrodes of the third group and the first electrodes of the fourth group; includes

When the touch input device according to the embodiment of the present invention is used, there is an advantage in that the touch sensing performance of the edge portion of the circular touch sensor can be improved.

In addition, there is an advantage that the mutual capacitance change amount (Cm) and/or the self-capacitance change amount (Cs) in each electrode in the circular touch sensor is uniform.

In addition, there is an advantage that the power consumption of the circular touch sensor can be reduced.

In addition, there is an advantage in that it is possible to sense whether a touch is made in the center of the circular touch sensor. Furthermore, there is the advantage of being able to distinguish between water droplets and touch.

In addition, there is an advantage of providing a routing method and a trace connection structure in a circular touch sensor.

1 is a perspective view of an example of a conventional smart watch.
FIG. 2 is a diagram illustrating a pattern structure of a touch sensor included in the smart watch shown in FIG. 1 .
3 is a view for explaining the electrode pattern structure of the touch sensor 350 according to an embodiment of the present invention.
FIG. 4 is an auxiliary view for explaining an arrangement structure of a plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 included in the touch sensor 350 shown in FIG. 3 .
5 is a view for explaining the electrode pattern structure of the touch sensor 550 according to another embodiment of the present invention.
FIG. 6 is a diagram for explaining a problem that may occur in the touch sensor 350 shown in FIG. 3 .
7 to 10 are diagrams for explaining routing of a plurality of electrodes included in the touch sensor according to an embodiment of the present invention shown in FIG. 5 .
11 is a view for explaining the number of traces of a touch sensor according to embodiments of the present invention.
12 is a view showing another example of FIG. 9 .
13 is a diagram for explaining routing and the number of traces of the touch sensor according to FIG. 12 .
FIG. 14 is a modified example of the touch sensor 350 shown in FIG. 3 .
FIG. 15 is a modified example of the touch sensor 550 shown in FIG. 5 .
16, 17A, and 17B are diagrams for explaining another routing and trace arrangement structure of the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 .
18A is a view for explaining the electrode pattern structure of the touch sensor 1850 according to another embodiment of the present invention.
18B and 18C are diagrams for explaining the routing and trace connection structure of the touch sensor 1850 shown in FIG. 18A .
19 is a view for explaining the electrode pattern structure of the touch sensor 1950 according to another embodiment of the present invention.
20 shows simulation environments for obtaining the simulation results described in Table 2, and reflects the YOCTA stack-up.
21 shows that in order to obtain the simulation results shown in Table 2, a touch is applied to the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A and the touch sensor 1950 shown in FIG. 19 . It is a simulation that confirms the base mutual capacitance value (Cm) in the untouched state.
22A to 22C show actual simulation output data in the state of FIG. 21 .
23 (a) to (c) are the mutual capacitance change amount in the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. These are graphs comparing how much Cm changes at the point where ΔCm) occurs as a maximum (Max) and a minimum (Min).
24 (a) to (c) are self-capacitance in each of the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. Cs) is the simulated output data.
25 is a touch sensor 550 shown in FIG. 5, in FIG. 18A to obtain the results of simulation 1 (Sim.1), simulation 2 (Sim.2), and simulation 3 (Sim.3) described in Table 2 It is a state in which three simulations (Sim.1, Sim.2, Sim.3) were performed with a 5 phi conductive rod for each of the illustrated touch sensor 1850 and the touch sensor 1950 illustrated in FIG. 19 . .
26 is a case in which the touch sensor 550 shown in FIG. 5, the touch sensor 1850 shown in FIG. 18A, and the touch sensor 1950 shown in FIG. 19 are each performed a straight line touch in the left drawing of FIG. It is a diagram simulating the maximum error and RMS error of .
27 is a graph of a maximum error and an RMS error for each position (1, 2, 3, 4).
28 is a case in which the theta line touch of the middle view of FIG. 25 is performed on each of the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 . It is a diagram simulating the maximum error and RMS error of .
29 is a graph of a maximum error and an RMS error for each angle (1, 2, 3).
30 is a case in which the wheel touch of the right drawing of FIG. 25 is performed on each of the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 . It is a diagram simulating the maximum error and the RMS error.
31 is a graph of a maximum error and an RMS error for each wheel position 1 and 2;
32 is a view for explaining the electrode pattern structure of the touch sensor 3250 according to another embodiment of the present invention.
FIG. 33 is a diagram showing a routing and trace connection structure of the touch sensor 3250 shown in FIG. 32 .
34 is a view for explaining the electrode pattern structure of the touch sensor 3450 according to another embodiment of the present invention.
FIG. 35 is a diagram illustrating a routing and trace connection structure of the touch sensor 3450 shown in FIG. 34 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents as those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

Hereinafter, a touch sensor and a touch input device including the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Here, in describing a touch sensor and a touch input device including the same according to various embodiments of the present invention, a smart watch is described as an example, but this is only an example and has a circular screen like a smart watch. Alternatively, the technical idea or features of the present invention may be applied to a touch input device having a touch screen having a shape similar to a circle or a shape, for example, an oval or a rectangle. Hereinafter, it will be described in detail with reference to the drawings.

3 is a view for explaining the electrode pattern structure of the touch sensor 350 according to an embodiment of the present invention.

Referring to FIG. 3 , the touch sensor 350 according to an embodiment of the present invention has a circular structure, and a plurality of electrodes TX0, ..., TX7, RX0, ..., RX7).

The plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 may be disposed to be spaced apart from each other in a circle having a predetermined diameter. Here, the diameter of the circle may be approximately 35 mm. The plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 arranged in the circle may be arranged in a predetermined arrangement.

The plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 includes a plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 and a plurality of second electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. and electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7.

When the touch sensor 350 according to an embodiment of the present invention is driven in the mutual sensing mode, the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 outputs a touch driving signal. may be a driving electrode, and the plurality of second electrodes RX0 , RX1 , RX2 , RX3 , RX4 , RX5 , RX6 , and RX7 may be reception electrodes for receiving a sensing signal. Here, on the contrary, the plurality of first electrodes may be the receiving electrodes, and the plurality of second electrodes may be the driving electrodes.

On the other hand, when the touch sensor 350 according to an embodiment of the present invention is driven in the self-sensing mode, the plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 outputs a touch driving signal. and receive a detection signal.

A plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) may be grouped into one group, and the touch sensor 350 is the first electrode grouped in this way (TX0, TX1) , TX2, TX3, TX4, TX5, TX6, TX7) may include a plurality. For example, the touch sensor 350 may include a first group of first electrodes, a second group of first electrodes, a third group of first electrodes, and a fourth group of first electrodes. First electrodes (eg, TX0) corresponding to each other of each group may be electrically connected through a trace.

The first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 of the first group may be disposed in a central portion to be circularly spaced apart from each other. Each of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 may have a sectoral shape. Here, the sectoral shape includes not only a geometrically perfect sectoral shape, but also a shape resembling or similar to the sectoral shape. Accordingly, the shape of the plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged in a circle in the central portion is a perfect sector shape in FIG. 3, but each part of the sector (or the sector) It should be understood that any other sector with a smaller radius) removed is also included in the sector shape. A cross-sectional area of each of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 of the first group may be the same as each other.

The first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 of the second group are arranged spaced apart from each other in a ring or annular shape surrounding the first electrodes of the first group, and the arrangement order is It may correspond to an arrangement order of the first electrodes of the first group. Each of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 of the second group may have the same cross-sectional area.

The first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 of the third group are arranged spaced apart from each other in a ring or annular shape surrounding the first electrodes of the second group, and the arrangement order is It may correspond to an arrangement order of the first electrodes of the second group. A cross-sectional area of each of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 of the third group may be the same as each other.

The first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 of the fourth group are arranged spaced apart from each other in a ring or annular shape surrounding the first electrodes of the third group, and the arrangement order is It may correspond to an arrangement order of the first electrodes of the third group. Each of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 of the fourth group may have the same cross-sectional area.

One or a plurality of 2-0th electrodes RX0 may be disposed between the first electrodes of the first group and the first electrodes of the second group. One or more 2-0th electrodes RX0 may have a ring shape or a ring shape.

Between the first electrodes of the second group and the first electrodes of the third group, a plurality of 2-1 electrodes RX1 , a plurality of second-2 electrodes RX2 , and a plurality of second-3 electrodes (RX3) may be placed. The plurality of second-first electrodes RX1 , the plurality of second-second electrodes RX2 , and the plurality of second-third electrodes RX3 may be arranged to be spaced apart from each other in a ring shape or annular shape. The arrangement order is that the order of the 2-1 th electrode RX1 , the 2-2 electrode RX2 , the 2-3 th electrode RX3 , and the 2-4 electrode RX4 is repeated in a clockwise or counterclockwise direction. can Here, the number of the plurality of 2-1 electrodes RX1 may be four, the number of the plurality of second-second electrodes RX2 may be eight, and the number of the plurality of second-third electrodes RX3 may be four. The cross-sectional areas of the second-first electrode RX1 and the second-third electrode RX3 may be twice that of the second-second electrode RX2 . Here, the arrangement order may be a clockwise or counterclockwise order of the 2-1 th electrode RX1 , the 2-2 th electrode RX2 , and the 2-3 th electrode RX3 .

The 2-1-th electrode RX1 includes two adjacent first electrodes in the second group (eg, TX1 and TX2/TX3 and TX4/TX5 and TX6/TX7 and TX0) and two adjacent first electrodes in the third group. It may be disposed between the electrodes (eg, TX1 and TX2). The 2-3rd electrode RX3 is disposed between two adjacent first electrodes (eg, TX2 and TX3) in the second group and two adjacent first electrodes (eg, TX2 and TX3) in the third group. can be placed.

Between the first electrodes of the third group and the first electrodes of the fourth group, a plurality of 2-4 electrodes RX4 , a plurality of second-5 electrodes RX5 , and a plurality of second-6 electrodes RX6 and a plurality of 2-7th electrodes RX7 may be disposed. The plurality of 2-4 electrodes RX4 , the plurality of 2-5 electrodes RX5 , the plurality of second-6 electrodes RX6 , and the plurality of second-7 electrodes RX7 are ring-shaped or annular. They may be arranged spaced apart from each other in the shape. The arrangement order is the 2-4th electrode RX4 , the 2-5th electrode RX5 , the 2-6th electrode RX6 , the 2-7th electrode RX7 , the 2-6th electrode RX6 , and the second electrode The order of the −5 electrodes RX5 may be repeated in a clockwise or counterclockwise direction. Here, the number of the plurality of 2-4 electrodes RX4 may be 4, the number of the plurality of 2-5 electrodes RX5 may be 8, and the number of the plurality of 2-6 electrodes RX6 may be 8, The number of the plurality of 2-7 electrodes RX7 may be four. The cross-sectional areas of the 2-4th electrode RX4 and the 2-7th electrode RX7 may be twice that of the 2-5th electrode RX5 or the 2-6th electrode RX6 . Here, in the arrangement order, the order of the 2-4th electrode RX4 , the 2-5th electrode RX5 , the 2-6th electrode RX6 , and the 2-7th electrode RX7 is repeated in a clockwise or counterclockwise direction. may be in the order of

The 2-4 electrode RX4 is disposed between two adjacent first electrodes (eg, TX1 and TX2) in the third group and two adjacent first electrodes (eg, TX1 and TX2) in the fourth group. can be placed. The 2-7th electrode RX7 is disposed between two adjacent first electrodes (eg, TX2 and TX3) in the third group and two adjacent first electrodes (eg, TX2 and TX3) in the fourth group. can be placed.

Meanwhile, although not shown in a separate drawing, when the diameter of the touch sensor 350 increases, one or more groups of first electrodes may be further added, and a second electrode may be added between the groups of the first electrodes. can be arranged.

Hereinafter, using FIG. 4, the arrangement structure of the plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 included in the touch sensor 350 shown in FIG. let me explain

FIG. 4 is an auxiliary view for explaining an arrangement structure of a plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 included in the touch sensor 350 shown in FIG. 3 .

The center O shown in FIG. 4 corresponds to the center of the touch sensor 350 shown in FIG. 3 , and the first to seventh virtual circles C1 , ..., C7 have the center O in common. They are concentric circles who Here, the first virtual circle C1 is defined as a concentric circle closest to the center O, and the seventh virtual circle C7 is defined as a concentric circle furthest from the center O.

3 and 4 , a plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 may be arranged on a plurality of concentric circles. More specifically, the plurality of electrodes TX0, ..., TX7, RX0, ..., RX7 is a plurality of imaginary circles C1, C2, C3, C4, C5, C6, C7).

Referring to FIGS. 3 and 4 , the first, 3, 5, and 7 virtual circles C1, C3, C5, and C7 have a plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, respectively. , TX7) may be arranged one by one. Hereinafter, it demonstrates concretely.

A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 are arranged one by one on the first virtual circle C1.

Each of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the first virtual circle C1 may have a sectoral shape. Here, the sectoral shape includes not only a geometrically perfect sectoral shape, but also a shape resembling or similar to the sectoral shape. Accordingly, the shape of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the first virtual circle C1 is a perfect sector shape in FIG. 3 , but each of the sector It should be understood that a shape in which a portion (or another sector having a smaller radius than the sector) is removed is also included in the sectoral shape.

A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the first virtual circle C1 are clockwise 1-0 electrode TX0, first- 1st electrode TX1, 1-2th electrode TX2, 1-3th electrode TX3, 1-4th electrode TX4, 1-5th electrode TX5, 1-6th electrode TX6 and the 1-7th electrode TX7 may be arranged in the order. Here, the arrangement order is an example, and the arrangement order may vary depending on the design.

A cross-sectional area of each of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the first virtual circle C1 may be the same.

A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 are arranged one by one on the third virtual circle C3.

The plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the third virtual circle C3 may be arranged in a ring shape or annular shape. A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the third virtual circle C3 is a ring-shaped or annular single pattern equally divided into 8 pieces can Alternatively, the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the third virtual circle C3 are each part of the sector (or another sector having a smaller radius than the sector) It may be a shape with the fan shape removed.

A cross-sectional area of each of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the third virtual circle C3 may be the same. The arrangement position of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the third virtual circle C3 is the plurality of arrangement positions on the first virtual circle C1 may correspond to an arrangement position of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Here, the cross-sectional area of the first electrode (eg, TX0) arranged on the third virtual circle (C3) corresponding to each other and the first electrode (eg, TX0) arranged on the first virtual circle (C1) , the cross-sectional area of the first electrode (eg, TX0) arranged on the third virtual circle C3 may be larger.

A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 are arranged one by one on the fifth virtual circle C5.

The plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the fifth virtual circle C5 may be arranged in a ring shape or annular shape. The plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the fifth virtual circle C5 is a ring-shaped or annular single pattern divided equally into eight pieces. can Alternatively, the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the fifth virtual circle C5 are each part of the sector (or another sector having a smaller radius than the sector) ) may be removed.

A cross-sectional area of each of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the fifth virtual circle C5 may be the same. The arrangement positions of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the fifth virtual circle C5 are the plurality of arrangement positions on the third virtual circle C3. may correspond to an arrangement position of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Here, the cross-sectional area of the first electrode (eg, TX0) arranged on the fifth virtual circle C5 corresponding to each other and the first electrode (eg, TX0) arranged on the third virtual circle C3 , the cross-sectional area of the first electrode (eg, TX0) arranged on the fifth virtual circle C5 may be larger.

A plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 are arranged one by one on the seventh virtual circle C7.

The plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the seventh virtual circle C7 may have a shape remaining after removing the vertex and arc portions of the sector. . Alternatively, the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the seventh virtual circle C7 may be arranged in a ring shape or annular shape. The plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the seventh virtual circle C7 is a ring-shaped or annular single pattern divided equally into eight pieces. can

A cross-sectional area of each of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 arranged on the seventh virtual circle C7 may be the same. The arrangement positions of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7 arranged on the seventh virtual circle C7 are the plurality of arranged on the fifth virtual circle C5. may correspond to an arrangement position of the first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Here, the cross-sectional area of the first electrode (eg, TX0) arranged on the seventh virtual circle (C7) and the first electrode (eg, TX0) arranged on the fifth virtual circle (C5) corresponding to each other , the cross-sectional area of the first electrode (eg, TX0) arranged on the seventh virtual circle C7 may be larger.

The sum of the cross-sectional areas of the 1-0 first electrodes TX0 positioned on the first, third, fifth, and seventh virtual circles C1, C3, C5, and C7, the first, 3, 5, and 7 virtual circles C1, C3, The sum of the cross-sectional areas of the first-first electrodes TX1 positioned on C5 and C7, and the first, second, and second electrodes TX2 positioned on the first, third, fifth, and seventh virtual circles C1, C3, C5, and C7 Sum of the cross-sectional areas of the first, 3, 5, and 7 virtual circles C1, C3, C5, and C7 The sum of the cross-sectional areas of the 1-3 electrodes TX3 positioned on the first, 3, 5, and 7 virtual circles The sum of the cross-sectional areas of the first to fourth electrodes TX4 positioned on (C1, C3, C5, C7), and the first-to-first positioned on the first, third, fifth, and seventh virtual circles (C1, C3, C5, C7) The sum of the cross-sectional areas of the 5 electrodes TX5, the sum of the cross-sectional areas of the 1-6 electrodes TX6 positioned on the first, 3, 5, and 7 imaginary circles C1, C3, C5, C7, and the first, 3 , 5, 7 The sum of the cross-sectional areas of the 1-7 electrodes TX7 positioned on the virtual circles C1, C3, C5, and C7 may be equal to each other, and the sum of the cross-sectional areas may be, for example, 19.1πmm ² have.

On the other hand, again, referring to FIGS. 3 and 4 , the plurality of second electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 are second, fourth, and sixth virtual circles C2, C4, C6) can be arranged. Here, the second virtual circle C2 is disposed between the first virtual circle C1 and the third virtual circle C3 , and the fourth virtual circle C4 is the third virtual circle C3 and the fifth virtual circle (C5), and the sixth virtual circle (C6) is disposed between the fifth virtual circle (C5) and the seventh virtual circle (C7).

A plurality of 2-0th electrodes RX0 are arranged on the second imaginary circle C2 , and a plurality of 2-1 th electrodes RX1 and a plurality of 2-2 electrodes RX1 are arranged on a fourth imaginary circle C4 . RX2 and a plurality of 2-3 electrodes RX3 are arranged, and a plurality of 2-4 electrodes RX4 , a plurality of second-5 electrodes RX5 , and a plurality of The 2-6 th electrode RX6 and the plurality of 2-7 th electrodes RX7 may be arranged.

The plurality of 2-0th electrodes RX0 arranged on the second virtual circle C2 may be two 2-0th electrodes RX0. The two 2-0th electrodes RX0 may be arranged in a ring shape or a ring shape. The two 2-0 th electrodes RX0 arranged on the second virtual circle C2 may be a ring-shaped or annular single pattern divided equally into two pieces. Here, the sum of the cross-sectional areas of the ^two 2-0th electrodes RX0 may be 18.8πmm 2 .

The four 2-1 electrodes RX1 , eight 2-2 electrodes RX2 , and four 2-3 electrodes RX3 arranged on the fourth virtual circle C4 are arranged in a ring shape or annular shape. do. The four 2-1 electrodes RX1 , eight 2-2 electrodes RX2 , and four 2-3 electrodes RX3 arranged on the fourth virtual circle C4 are ring-shaped or ring-shaped single electrodes. It may be that the pattern is divided into 16 parts. Here, the cross-sectional area of one 2 - 1 electrode RX1 may be twice that of one 2 - 2 electrode RX2 . Also, the cross-sectional area of one 2-3rd electrode RX3 may be twice that of one 2-2nd electrode RX2 .

The four 2-1 electrodes RX1 , the eight 2-2 electrodes RX2 , and the four 2-3 electrodes RX3 arranged on the fourth virtual circle C4 may have a predetermined arrangement order. can For example, the predetermined arrangement order is the 2-1 th electrode RX1 , the 2-2 th electrode RX2 , the 2-3 th electrode RX3 , and the 2-2 electrode RX1 ) in a clockwise or counterclockwise direction. RX2) may be repeated.

The sum of the cross-sectional areas of the four 2-1 electrodes RX1 arranged on the fourth virtual circle C4, the sum of the cross-sectional areas of the eight 2-2 electrodes RX2, and the four 2-3 electrodes RX3 ) may be the same as the sum of the cross-sectional areas. For example, the sum of the cross-sectional areas of the four 2-1 electrodes RX1 , the sum of the cross-sectional areas of the eight 2-2 electrodes RX2 , and the sum of the cross-sectional areas of the four 2-3 th electrodes RX3 is 19.4 It may be ^{πmm 2 .}

On the other hand, the arrangement order of the four 2-1 electrodes RX1, the eight 2-2 electrodes RX2, and the four 2-3 electrodes RX3 arranged on the fourth virtual circle C4 is, It can be any other collating sequence.

Again, referring to FIG. 3 , four 2-4 electrodes RX4 , eight 2-5 electrodes RX5 , and eight 2-6 electrodes RX6 arranged on the sixth virtual circle C6 . ) and the four 2-7 electrodes RX7 are arranged in a circular or ring shape. Four 2-4th electrodes RX4, 8 2-5th electrodes RX5, 8 2-6th electrodes RX6, and 4 2-7th electrodes RX4 arranged on the 6th virtual circle C6 The electrode RX7 may be formed by dividing a single ring-shaped or annular pattern into 24 pieces. Here, the cross-sectional area of one 2-4 electrode RX4 may be twice that of one 2-5 electrode RX5 or one 2-6 electrode RX6 . Also, the cross-sectional area of one 2-7 electrode RX7 may be twice that of one 2-5 electrode RX5 or one 2-6 electrode RX6 .

Four 2-4th electrodes RX4, 8 2-5th electrodes RX5, 8 2-6th electrodes RX6, and 4 2-7th electrodes RX4 arranged on the 6th virtual circle C6 The electrodes RX7 may have a predetermined arrangement order. For example, the predetermined arrangement order is in a clockwise or counterclockwise direction: the 2-4th electrode RX4 , the 2-5th electrode RX5 , the 2-6th electrode RX6 , and the 2-7th electrode ( The order of RX7 ), the 2-6 th electrode RX6 , and the 2-5 th electrode RX5 may be repeated.

The sum of the cross-sectional areas of the four 2-4 electrodes RX4 arranged on the sixth virtual circle C6, the sum of the cross-sectional areas of the eight 2-5 electrodes RX5, and the eight 2-6 electrodes RX6 ) and the sum of the cross-sectional areas of the four 2-7 electrodes RX7 may be the same. For example, the sum of the cross-sectional areas of the plurality of 2-4 electrodes RX4 , the sum of the cross-sectional areas of the plurality of 2-5 electrodes RX5 , the sum of the cross-sectional areas of the plurality of second-6 electrodes RX6 , and the plurality The sum of the cross-sectional areas of the 2-7th electrode RX7 may be ^{19.1πmm 2 .}

Meanwhile, four 2-4 electrodes RX4 , eight 2-5 electrodes RX5 , eight 2-6 electrodes RX6 , and four second electrodes RX4 are arranged on the sixth virtual circle C6 . The arrangement order of the -7 electrodes RX7 may be another arrangement order.

Referring to FIG. 3 , any one of the first electrodes (eg, TX0) of the plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) on the first virtual circle C1 ) and the second electrode RX0 is disposed between the first electrode TX0 on the third virtual circle C3 corresponding to the one first electrode TX0.

Between the first electrode TX0 on the third virtual circle C3 and the first electrode TX0 on the third virtual circle C3 and the first electrode TX0 on the fifth virtual circle C5 corresponding to the first electrode TX0 A half of the 2-1 electrode RX1 , a 2-2 th electrode RX2 , and a half of the 2-3 th electrode RX3 are disposed. Here, the other half of the 2-1 th electrode RX1 is disposed between another adjacent first electrode TX7 on the third virtual circle and another adjacent first electrode TX7 on the fifth virtual circle C5 . . In addition, the other half of the second-third electrode RX3 is disposed between another first electrode TX1 adjacent on the third virtual circle and another first electrode TX1 adjacent on the fifth virtual circle C5 . are placed

Between the first electrode TX0 on the fifth virtual circle C5 and the first electrode TX0 on the fifth virtual circle C5 and the first electrode TX0 on the corresponding seventh virtual circle C7 A half of the 2-4 electrode RX4 , a 2-5 th electrode RX5 , a 2-6 th electrode RX6 , and a half of the 2-7 th electrode RX7 are disposed. Here, the other half of the 2-4 electrode RX4 is between the first electrode TX7 adjacent on the fifth virtual circle C5 and the first electrode TX7 adjacent on the seventh virtual circle C7. is placed on In addition, the other half of the 2-7th electrode RX7 is adjacent to another first electrode TX1 on the fifth virtual circle C5 and another first electrode TX1 adjacent to the second electrode TX1 on the seventh virtual circle C7. ) are placed between

Meanwhile, referring to the drawing at the lower right of FIG. 3 , when the diameter of the touch sensor 350 is 35 mm, the radius is 17.5 mm, and the length from the center to the first electrode on the first virtual circle C1 is 2.5 mm, the length from the center to the 2-0 electrode RX0 on the second imaginary circle C2 is 5.1 mm, the length from the center to the first electrode on the third imaginary circle C3 is 7.5 mm, and the fourth imaginary circle C3 is 7.5 mm. The length from the second electrode on the circle C4 is 10.7, the length from the center to the first electrode on the fifth imaginary circle C5 is 12.8 mm, and the length from the center to the second electrode on the sixth imaginary circle C6 is 10.7 mm. may be 15.5 mm, and a length from the center to the first electrode on the seventh virtual circle C7 may be 17.5 mm. Here, the distance between the first electrode and the second electrode may be changed according to actual routing.

In this way, the touch sensor 350 according to the embodiment of the present invention shown in FIG. 3 includes eight, a plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7. Eight second electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 may also be configured. Therefore, the total number of channels is 8+8, and a total of 16 channels can be configured.

In addition, since the number of RX channels is 8, which is an even number, there is an advantage that differential sensing is possible.

In addition, since the cross-sectional area of each channel is uniform, there is an advantage that a self-capacitance change amount value (self cap) is uniformly generated when a plurality of electrodes are driven in the self-sensing mode.

In addition, since the cross-sectional area of each channel is uniform, there is an advantage in that the mutual capacitance variation value (mutual cap, Cm) output from the receiving electrode is uniformly generated when the plurality of electrodes are driven in the mutual sensing mode. It may have a Cm value of about 200 pF or less.

In addition, in the conventional touch sensor having an orthogonal pattern structure shown in FIG. 2, the SNR of touch sensing is low when a wheel is touched, so touch coordinate recognition is not good, but the touch sensor shown in FIG. 3 has a plurality of Since the electrodes are arranged, it is possible to improve the SNR of the touch sensing, and thus there is an advantage in that it is possible to clearly recognize the touch coordinates.

In addition, the touch sensor shown in FIG. 3 has the advantage of being implemented in a full node method in which the first electrode is positioned on both sides of one second electrode, respectively.

In addition, the total number of traces may be configured to 37 through a predetermined routing method. A description of the routing method and the total number of traces will be described later with reference to FIGS. 7 to 10 .

5 is a view for explaining the electrode pattern structure of the touch sensor 550 according to another embodiment of the present invention.

The touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 is a 2-0 electrode ( The only difference is that RX0) is added. Accordingly, matters except for the following description are the same as those shown in FIG. 3 or FIG. 4 . Hereinafter, parts different from those of FIG. 3 will be mainly described.

Referring to FIG. 5 , in the touch sensor 550 according to another embodiment of the present invention, the 2-0th electrode RX0 is disposed in the center portion, and the first electrodes TX0 and TX1 of the first group described with reference to FIG. 3 . , TX2, TX3, TX4, TX5, TX6, TX7 are arranged to surround the 2-0th electrode RX0.

Alternatively, in the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 , a 2-0 th electrode RX0 is additionally disposed in addition to the touch sensor 350 shown in FIG. 3 , the second The -0 electrode RX0 may be disposed on the center O shown in FIG. 4 .

The touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 can solve the following problems that may occur in the touch sensor 350 shown in FIG. 3 . It will be described with reference to FIG. 6 .

FIG. 6 is a diagram for explaining a problem that may occur in the touch sensor 350 shown in FIG. 3 . Specifically, FIG. 6 is a view illustrating a case in which a predetermined test conductive rod T is moved on the touch sensor 350 shown in FIG. 3 , and the left diagram shows the test conductive rod T and the touch sensor 350 ) is a view positioned on an arbitrary position, and the right figure is a view in which the test conductive rod T is positioned at the exact center of the touch sensor 350 . Here, the test conductive rod T may have a diameter of approximately 5 phi and may be formed of a conductive material.

From the left drawing of FIG. 6 to the right drawing, the test conductive rod T covers the center of the touch sensor 350 or the first electrodes of the first group or the first electrodes on the first virtual circle in the touch sensor 350 . In the case where it is positioned so that the touch sensor 350 is positioned so as to be connected to each other, a problem occurs in that the detection signal output from the touch sensor 350 disappears. This may occur when the touch sensor 350 drives in a self-sensing mode and senses a sensing signal using differential sensing.

Here, the differential sensing is performed by subtracting sensing signals output from two first electrodes among the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. method of sensing. For example, when the touch sensor 350 is driven in the self-sensing mode, the touch driving IC (or control unit) of the touch input device uses two outputs output from the 1-0 electrode TX0 and the 1-1 electrode TX1. A touch may be determined by receiving a signal obtained by subtracting the detection signals from each other.

As shown in the right diagram of FIG. 6 , in a state in which the test conductive rod T is touched to cover the first electrodes of the first group or the first electrodes on the first virtual circle in the touch sensor 350, in FIG. When the illustrated touch sensor 350 is driven in the self-sensing mode, a predetermined detection signal is output from each of the first electrodes of the first group. If two detection signals output from TX0 and TX1 are subtracted, it is 0, TX2 It is 0 when the two detection signals output from and TX3 are subtracted, 0 when the two detection signals output from TX4 and TX5 are subtracted, and 0 when the two detection signals output from TX6 and TX7 are subtracted. The detection signal input to the IC (or control unit) becomes 0. Accordingly, even though the test conductive rod T is located in the center of the touch sensor 350 , the touch input device does not detect any touch.

However, since the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 additionally includes a circular 2-0 electrode R0 having a predetermined diameter in the center portion, the As shown in the left figure, even when the test conductive rod T is touched at the center of the touch sensor 550 shown in FIG. It can be sensed whether

Furthermore, the touch sensor 550 shown in FIG. 5 can distinguish a touch from a water drop in the central part by the 2-0 second electrode RX0 additionally disposed in the central part, but the touch sensor 350 shown in FIG. 3 . ) cannot distinguish water droplets as well as touch in the center.

In addition, the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 has eight, a plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Eight two electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 may also be configured. Therefore, the total number of channels is 8+8, and a total of 16 channels can be configured.

In addition, since the number of RX channels is 8, which is an even number, there is an advantage that differential sensing is possible.

In addition, since the cross-sectional area of each channel is uniform, there is an advantage that a self-capacitance change amount value (self cap) is uniformly generated when a plurality of electrodes are driven in the self-sensing mode.

In addition, since the cross-sectional area of each channel is uniform, there is an advantage in that the mutual capacitance variation value (mutual cap, Cm) output from the receiving electrode is uniformly generated when the plurality of electrodes are driven in the mutual sensing mode. Here, for example, it may have a Cm value of about 200 pF or less.

In addition, in the conventional touch sensor having an orthogonal pattern structure shown in FIG. 2, the SNR of touch sensing is low when the wheel is touched, so touch coordinate recognition is not good, but the touch sensor shown in FIG. Since the electrodes are arranged, it is possible to improve the SNR of the touch sensing, and thus there is an advantage in that it is possible to clearly recognize the touch coordinates.

In addition, the touch sensor shown in FIG. 5 is a full node in which the first electrode is located on both sides with respect to one second electrode, except for the 2-0 electrode RX0 located in the central part. implemented in a way Accordingly, the touch sensor shown in FIG. 5 is almost a full node method.

In addition, the total number of traces may be configured to 37 through a predetermined routing method. A description of the routing method and the total number of traces will be described later with reference to FIGS. 7 to 10 .

Meanwhile, referring to the drawing at the lower right of FIG. 5 , when the diameter of the touch sensor 550 is 35 mm, the radius is 17.5 mm, and the length from the center to the 2-0 electrode RX0 located in the center is 0.1 mm, the length from the center to the first electrode on the first imaginary circle C1 is 2.5 mm, the length from the center to the 2-0 electrode RX0 on the second imaginary circle C2 is 4.9 mm, and the length from the center to the second electrode RX0 is 4.9 mm. 3 The length to the first electrode on the imaginary circle C3 is 7.5 mm, the length to the second electrode on the fourth imaginary circle C4 is 10.7, and the length from the center to the first electrode on the fifth imaginary circle C5 is 7.5 mm. may be 12.8 mm, a length from the center to the second electrode on the sixth virtual circle C6 may be 15.5 mm, and a length from the center to the first electrode on the seventh virtual circle C7 may be 17.5 mm. Here, the distance between the first electrode and the second electrode may be changed according to actual routing.

7 to 10 are diagrams for explaining routing of a plurality of electrodes included in the touch sensor according to an embodiment of the present invention shown in FIG. 5 .

7 to 8 are diagrams for explaining the routing and trace connection structures of the plurality of first electrodes TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7 shown in FIG. 5 . 7 is a view for explaining the routing and trace connection structure of the 1-0 electrode (TX0), the 1-1 electrode (TX1), the 1-6 electrode (TX6), and the 1-7 electrode (TX7) , FIG. 8 is a view for explaining the routing and trace connection structure of the 1-2th electrode (TX2), the 1-3th electrode (TX3), the 1-4th electrode (TX4), and the 1-5th electrode (TX5) to be. Here, the matters illustrated in FIGS. 7 to 8 may be directly applied to the touch sensor 350 according to the embodiment of the present invention illustrated in FIG. 3 .

First, referring to FIG. 7 , traces of the 1-0 electrode TX0 , the 1-1 electrode TX1 , the 1-6 electrode TX6 , and the 1-7 electrode TX7 are traced to the touch sensor 550 . ) can be located on one side (left).

Specifically, the 1-0 first electrodes TX0 positioned on the first, 3, 5, and 7 virtual circles C1, C3, C5, and C7 are electrically connected to the trace ⒜, and the first, 3, 5, and 7 The first-7 electrodes TX7 positioned on the virtual circles C1, C3, C5, and C7 are electrically connected to the trace ⒣. For reference, in FIG. 7 , for convenience of explanation, traces ⒜ and the first , 3, 5, 7 Traces ⒣ connected to the 1-7 electrodes TX7 positioned on the virtual circles C1, C3, C5, and C7 are indicated by a single thick line.

The trace ⒜ is connected to the 1-0 electrode TX0 while passing between the 1-0 electrode TX0 and the 1-7 electrode TX7 on the seventh virtual circle C7, and the sixth virtual circle C6 ), passing between the 2-4 electrode RX4 and the 2-5 electrode RX5, and between the 1-0 electrode TX0 and the 1-7 electrode TX7 on the fifth virtual circle C5. As it passes, it is connected to the 1-0 electrode TX0, passes between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and passes through the third virtual circle C3. It passes between the 1-0 electrode TX0 and the 1-7 electrode TX7 on the upper surface and is connected to the 1-0 electrode TX0, and the two 2-0 electrodes ( RX0) and connected to the 1-0 electrode TX0 on the first virtual circle C1.

The trace ⒣ passes between the 1-0th electrode TX0 and the 1-7th electrode TX7 on the 7th virtual circle C7 and is connected to the 1-7th electrode TX7, and the 6th virtual circle C6 ), passing between the 2-4 electrode RX4 and the 2-5 electrode RX5, and between the 1-0 electrode TX0 and the 1-7 electrode TX7 on the fifth virtual circle C5. As it passes, it is connected to the 1-7 electrode TX7, passes between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and passes through the third virtual circle C3. It passes between the 1-0 electrode TX0 and the 1-7 electrode TX7 on the upper surface and is connected to the 1-7 electrode TX7, and the two 2-0 electrodes ( RX0) and connected to the 1-7 electrode TX7 on the first virtual circle C1.

The first-first electrodes TX1 positioned on the first, third, fifth, and seventh virtual circles C1, C3, C5, and C7 are electrically connected to the trace ⒝. Specifically, the trace ⒝ is connected to the 1-1 electrode TX1 while passing between the 1-0 electrode TX0 and the 1-1 electrode TX1 on the seventh virtual circle C7, and the sixth virtual circle C7. Passing between the 2-4th electrode RX4 and the 2-5th electrode RX5 on the circle C6, the 1-0th electrode TX0 and the 1-1th electrode TX1 on the fifth virtual circle C5 ), connected to the 1-1 electrode TX1, passing between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and a third virtual circle Passing between the 1-0 electrode TX0 and the 1-1 electrode TX1 on (C3), it is connected to the 1-1 electrode TX1, and the two second- It passes between the 0 electrodes RX0 and is connected to the 1-1 electrode TX1 on the first virtual circle C1.

The 1st-6th electrodes TX6 positioned on the 1st, 3rd, 5th, 7th virtual circles C1, C3, C5, and C7 are electrically connected to the trace ⒠. Specifically, the trace ⒠ passes between the 1-7 electrode TX7 and the 1-6 electrode TX6 on the 7th virtual circle C7 and is connected to the 1-6 electrode TX6, and the 6th virtual circle C7. Passing between the 2-4th electrode RX4 and the 2-5th electrode RX5 on the circle C6, the 1-7th electrode TX7 and the 1-6th electrode TX6 on the 5th virtual circle C5 ), connected to the 1-6 electrode TX6, passing between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and a third virtual circle Passing between the 1-7th electrode TX7 and the 1-6th electrode TX6 on (C3), it is connected to the 1-6th electrode TX6, and the two second- It passes between the 0 electrodes RX0 and is connected to the first-6 electrodes TX6 on the first virtual circle C1 .

Referring to FIG. 8 , traces of the 1-2 th electrode TX2 , the 1-3 th electrode TX3 , the 1-4 th electrode TX4 , and the 1-5 th electrode TX5 are traced by the touch sensor 550 . It can be located on the other side (right side).

Specifically, the first 1-3 electrodes TX3 positioned on the first, third, fifth, and seventh virtual circles C1, C3, C5, and C7 are electrically connected to the trace ⒟, and the first, 3, 5, and 7 The 1-4 th electrodes TX4 positioned on the virtual circles C1 , C3 , C5 , and C7 are electrically connected to the trace ⒠. For reference, in FIG. 8 , for convenience of explanation, traces ⒟ and the first , 3, 5, 7 Traces ⒠ connected to the 1-4 electrodes TX4 positioned on the virtual circles C1, C3, C5, and C7 are indicated by a single thick line.

The trace ⒟ passes between the 1-3 electrodes TX3 and the 1-4 electrodes TX4 on the seventh virtual circle C7 and is connected to the 1-3 electrodes TX0, and the sixth virtual circle C6 ) between the 2-4th electrode RX4 and the 2-5th electrode RX5 and between the 1-3th electrode TX3 and the 1-4th electrode TX4 on the fifth virtual circle C5. As it passes, it is connected to the 1-3 electrode TX3, passes between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and passes through the third virtual circle C3. It passes between the 1-3 th electrode TX3 and the 1-4 th electrode TX4 and is connected to the 1-3 th electrode TX3, and the two 2-0 th electrodes on the second virtual circle C2 ( RX0) and connected to the 1-3 electrodes TX3 on the first virtual circle C1.

The trace ⒠ passes between the 1-3 th electrodes TX3 and the 1-4 th electrodes TX4 on the seventh virtual circle C7 and is connected to the 1-4 th electrodes TX4, and the sixth imaginary circle C6 ) between the 2-4th electrode RX4 and the 2-5th electrode RX5 and between the 1-3th electrode TX3 and the 1-4th electrode TX4 on the fifth virtual circle C5. As it passes, it is connected to the 1-4 th electrode TX4, passes between the 2-1 th electrode RX1 and the 2-2 th electrode RX2 on the fourth virtual circle C4, and the third virtual circle C3 It passes between the 1-3 electrodes TX3 and the 1-4 electrodes TX4 on the upper surface and is connected to the 1-4 electrodes TX4, and the two 2-0 electrodes ( RX0) and connected to the 1-4 electrodes TX4 on the first virtual circle C1.

The 1-2 first electrodes TX2 positioned on the first, third, fifth, and seventh virtual circles C1 , C3 , C5 and C7 are electrically connected to the trace ⒞. In detail, the trace ⒞ passes between the 1-2 first electrode TX2 and the 1-3 first electrode TX3 on the seventh virtual circle C7 and is connected to the first-2 electrode TX2 and the sixth virtual circle C7. Passing between the 2-4 th electrode RX4 and the 2-5 th electrode RX5 on the circle C6, the 1-2 th electrode TX2 and the 1-3 th electrode TX3 on the fifth virtual circle C5 ), connected to the 1-2 first electrode TX2, passing between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and a third virtual circle It passes between the 1-2-th electrode TX2 and the 1-3-th electrode TX3 on (C3) and is connected to the 1-2-th electrode TX2, and the two 2-second electrodes on the second virtual circle C2 It passes between the zero electrodes RX0 and is connected to the first-second electrode TX2 on the first virtual circle C1 .

The 1st-5th electrodes TX5 positioned on the 1st, 3rd, 5th, 7th virtual circles C1, C3, C5, and C7 are electrically connected to the trace A. Specifically, the trace ⒡ passes between the 1-4 th electrodes TX4 and 1-5 th electrodes TX5 on the 7th virtual circle C7 and is connected to the 1-5 th electrodes TX5, and the 6th imaginary Passing between the 2-4th electrode RX4 and the 2-5th electrode RX5 on the circle C6, the 1-4th electrode TX4 and the 1-5th electrode TX5 on the fifth virtual circle C5 ), connected to the 1-5 electrode TX5, passing between the 2-1 electrode RX1 and the 2-2 electrode RX2 on the fourth virtual circle C4, and a third virtual circle It passes between the 1-4th electrode TX4 and the 1-5th electrode TX5 on (C3) and is connected to the 1-5th electrode TX5, and the two second- It passes between the 0 electrodes RX0 and is connected to the 1 - 5 electrodes TX5 on the first virtual circle C1 .

9 to 10 are views for explaining the routing and trace connection structures of the plurality of second electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 shown in FIG. 5 . 9 is a view for explaining the routing and trace connection structure of a plurality of second electrodes RX0 to RX7 located on the first to seventh virtual circles C1, ..., C7, and FIG. 10 is a fourth virtual circle The routing structure of the 2-1 th electrode RX1 , the 2-2 electrode RX2 , and the 2-3 th electrode RX3 on the circle C4 and the 2-4 electrode RX4 on the sixth virtual circle C6 ), the 2-5th electrode (RX5), the 2-6th electrode (RX6), a diagram for explaining the routing structure of the 2-7th electrode (RX7). Here, the matters shown in FIGS. 9 to 10 may be directly applied to the touch sensor 350 according to the embodiment of the present invention shown in FIG. 3 .

Referring to FIG. 9 , the trace ⓐ is electrically connected to the two 2-0th electrodes RX0 on the second virtual circle C2 and the 2-0th electrode RX0 located at the center. Trace ⓐ is located together with trace ⒜ and trace ⒣ described in FIG. 7 on the 7th, 6th, 5, 4, 3, and 2 virtual circles (C7, C6, C5, C4, C3, C2), and the second virtual circle It is connected to the two 2-0th electrodes RX0 on (C2) and passes between the 1-0th electrode TX0 and the 1-7th electrode TX7 on a first virtual circle (not shown) and located in the center It is connected to the 2-0th electrode RX0. Here, in the case of the touch sensor 350 illustrated in FIG. 3 , the trace ⓐ is finished to be connected to the two 2-0 th electrodes RX0 on the second virtual circle C2 .

Referring to FIG. 10 , the trace ⓑ is connected to any one of the 2-1 th electrodes RX1 among the two 2-1 th electrodes RX1 connected in series with each other on the fourth virtual circle C4 .

The trace ⓒ is connected to any one of the 2-2 electrodes RX2 among the four 2-2 electrodes RX2 connected in series on the fourth virtual circle C4.

The trace ⓓ is connected to any one of the 2-3th electrodes RX3 among the two 2-3rd electrodes RX3 connected in series on the fourth virtual circle C4 .

Referring to FIG. 9 , three traces ⓑⓒⓓ are arranged together up to the fourth virtual circle C4. Specifically, the three traces ⓑⓒⓓ pass between the 1-6 electrode TX6 and the 1-7 electrode TX7 on the seventh virtual circle C7, and the second-second on the sixth virtual circle C6. A fourth virtual circle passes between the 4th electrode RX4 and the 2-5th electrode RX5 and passes between the 1-6th electrode TX6 and the 1-7th electrode TX7 on the fifth virtual circle C5 . It is connected to the any one of the 2-1th electrode RX1, the one 2-2 electrode RX2, and the any one 2-3th electrode RX3 on (C4), respectively.

Again, referring to FIG. 10 , the trace ⓔ is connected to any one of the 2-4 electrodes RX4 among the two 2-4 electrodes RX4 connected in series on the sixth virtual circle C6.

The trace ⓕ is connected to any one of the 2-5 electrodes RX5 among the four 2-5 electrodes RX5 connected in series on the sixth virtual circle C6.

The trace ⓖ is connected to any one of the 2-6 electrodes RX6 among the four 2-6 electrodes RX6 connected in series on the sixth virtual circle C6.

In addition, the trace ⓗ is connected in parallel to the two 2-7 electrodes RX7 on the sixth virtual circle C6.

Referring to FIG. 9 , three traces ⓔⓕⓖ are arranged together up to the sixth virtual circle C6. Specifically, the three traces ⓔⓕⓖ pass between the 1-4 electrodes TX4 and 1-5 electrodes TX5 on the seventh virtual circle C7, and pass between the first and fifth electrodes TX5 on the sixth virtual circle C6. Each of the 2-4 th electrode RX4 , the one 2-5 th electrode RX5 , and the one 2-6 th electrode RX6 are connected to each other. And, the trace ⓗ passes between the 1-5 electrode TX5 and the 1-6 electrode TX6 on the seventh virtual circle C7, and passes between the two 2-7 electrodes RX7 on the sixth virtual circle C6. ) are connected in parallel with

Meanwhile, although not shown in FIG. 9 , three traces ⓑⓒⓓ and three traces ⓔⓕⓖ may be disposed in the semicircular portion omitted from FIG. 9 as well.

11 is a view for explaining the number of traces of a touch sensor according to embodiments of the present invention. Here, in FIG. 11 , the left traces include the traces according to FIGS. 7 and 10 , and the right traces include the traces according to FIGS. 8 and 10 .

Referring to FIG. 11 , according to the routing method shown in FIGS. 7 to 10 , 20 traces may be disposed on one side of the touch sensors 350 and 550 , and the other of the touch sensors 350 and 550 . 17 traces may be disposed on one side.

Specifically, 20 traces disposed on one side of the touch sensors 350 and 550 are respectively 2 traces for ESD on both sides, 4 traces for TX0, TX1, TX6, TX7, and traces for RX0 to RX7 It can consist of 8, 6 GUARD traces to prevent electrical contact between TX and RX.

17 traces disposed on the other side of the touch sensors 350 and 550, 2 traces for ESD, 4 traces for TX2, TX3, TX4, TX5, 7 traces for RX1 to RX7, respectively, on both sides , can be composed of 4 guard traces (GUARD) to prevent electrical contact between TX and RX.

As such, the touch sensors 350 and 550 shown in FIG. 3 or FIG. 5 may include a total of 37 traces, and among these traces, 23 active traces may be configured. Here, the active trace means the number of traces connected to the TXs and RXs except for 10 guard traces and 4 ESD traces from the total number of traces.

12 is a diagram illustrating another example of FIG. 9 , and FIGS. 13 (a) and (b) are diagrams for explaining routing and the number of traces of the touch sensor illustrated in FIG. 12 .

In the touch sensor according to another example illustrated in FIG. 12 , the position of the trace ⓔⓕⓖ is different from the position of the trace ⓔⓕⓖ of FIG. 9 . Specifically, the trace ⓔⓕⓖ is disposed together with the trace ⓗ.

Referring to FIGS. 12 and 13 (a) , the trace ⓔ is one of the 2-4 electrodes RX4 of the two 2-4 electrodes RX4 connected in series with each other on the sixth virtual circle C6. ) is associated with

The trace ⓕ is connected to any one of the 2-5 electrodes RX5 among the four 2-5 electrodes RX5 connected in series on the sixth virtual circle C6.

The trace ⓖ is connected to any one of the 2-6 electrodes RX6 among the four 2-6 electrodes RX6 connected in series on the sixth virtual circle C6.

In addition, the trace ⓗ is connected in parallel to the two 2-7 electrodes RX7 on the sixth virtual circle C6.

Referring to FIG. 12 , four traces ⓔⓕⓖⓗ are arranged together up to the sixth virtual circle C6. Specifically, the four traces ⓔⓕⓖⓗ pass between the 1st-5th electrode TX5 and the 1-6th electrode TX6 on the 7th virtual circle C7, and pass between the 1st and 6th electrodes TX6 on the 6th virtual circle C6. connected to the 2-4 th electrode RX4, the one 2-5 electrode RX5, the one 2-6 electrode RX6, and the two 2-7 electrodes RX7 of .

Meanwhile, although not shown in FIG. 12 , three traces ⓑⓒⓓ and four traces ⓔⓕⓖⓗ may be disposed in the semicircular portion omitted from FIG. 12 as well.

Referring to FIG. 13B , 21 traces may be disposed on one side of the touch sensor illustrated in FIG. 12 , and 18 traces may be disposed on the other side of the touch sensor shown in FIG. 12 .

Specifically, 21 traces disposed on one side of the touch sensor shown in FIG. 12 are respectively 2 traces for ESD on both sides, 4 traces for TX0, TX1, TX6, TX7, and traces for RX0 to RX7 It can consist of 8, 7 GUARD traces to prevent electrical contact between TX and RX.

The 18 traces disposed on the other side of the touch sensor shown in FIG. 12 are 2 traces for ESD, 4 traces for TX2, TX3, TX4, TX5, 7 traces for RX1 to RX7, respectively, on both sides , can be composed of 5 traces for guard (GUARD) to prevent electrical contact between TX and RX.

In this way, the touch sensor shown in FIG. 12 may be configured with a total of 39 traces, and among these traces, 23 active traces may be configured. Here, the active trace means the number of traces connected to the TXs and RXs except for 12 guard traces and 4 ESD traces from the total number of traces.

FIG. 13 is a modified example of the touch sensor 350 shown in FIG. 3 .

The touch sensor 350 ′ shown in FIG. 13 has a plurality of first electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, compared to the touch sensor 350 shown in FIG. 3 , There is a difference in that the plurality of second electrodes are composed of TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7.

The touch sensor 350 ′ shown in FIG. 13 also has the same technical effects as the touch sensor 350 shown in FIG. 3 , and the number of routing or traces can be configured in the same way.

FIG. 14 is a modified example of the touch sensor 550 shown in FIG. 5 .

The touch sensor 550 ′ shown in FIG. 14 has a plurality of first electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, compared to the touch sensor 550 shown in FIG. 5 , There is a difference in that the plurality of second electrodes are composed of TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7.

The touch sensor 550 ′ shown in FIG. 14 also has the same technical effects as the touch sensor 550 shown in FIG. 5 , and the number of routing or traces can be configured in the same way.

Table 1 below compares the characteristics of the conventional touch sensor shown in FIG. 2 , the touch sensor according to an embodiment of the present invention shown in FIG. 3 , and the touch sensor according to another embodiment of the present invention shown in FIG. 5 . it is one ticket

2 touch sensor 3 touch sensor 5 touch sensor Diameter [mm] 35 35 35 Channel TX 8 8 8 RX 8 8 8 Trace Count (including ESD and GUARD) 26 37 37 Is the trace coupling regular and can be removed from SW? N/A Need verification
Need verification
Pattern No odd channels? O O O No disappearance of center coordinates in differential sensing mode? O X O Self orthogonality possible? (No need to multiply) O X X Is Cm uniform? X O O uniform shape? Is the self cap for each sensor the same? X O O All below 200pF? O O O Edge coordinates possible? (Wheel function) X O O No mix of half node and full node? O O X Distinguishable between 5 pie touches and water droplets in the center area? O X O

16, 17A, and 17B are diagrams for explaining another routing and trace arrangement structure of the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 .

16, 17A, and 17B , the number of traces of the touch sensor 550 of FIG. 5 may be 43. Although the number of traces of the touch sensor 550 of FIG. 5 slightly increased than the number of traces of the touch sensors of FIGS. 3, 5, and 12, the number of traces passing between the electrode (or pattern) and the electrode (or pattern) as a whole It can be reduced, and when considering the performance of the touch sensor, there is an advantage that the capacitance change amount (delta Cm) is formed larger. In addition, since the bundles A and B of traces can be reduced to two, there is an advantage in that trace management is easy.

When the virtual circle of FIG. 4 is introduced and described, the 2-1 th electrodes RX1 , the 2-2 th electrodes RX2 , and the 2-3 th electrodes RX3 are disposed on the fourth virtual circle C4 . are divided into two groups (1st group and 2nd group). Each group includes RX2-RX3-RX2-RX1-RX2-RX3-RX2-RX1 sequentially arranged clockwise on the fourth virtual circle C4. The 2-1 th electrodes RX1 of each group are connected in series, the 2-2 th electrodes RX2 are also connected in series, and the 2-3 th electrodes RX3 are also connected in series.

A trace connected to any one of the 2-1th electrode RX1 in the first group, a trace connected to one 2-2 electrode RX2, and a trace connected to one 2-3th electrode RX3 in the first group include a fifth Between the 1-6th electrode TX6 and the 1-7th electrode TX7 on the imaginary circle C5, the 2-5th electrode RX5 and the 2-6th electrode RX6 on the 6th imaginary circle C6 It is included in the trace bundle A, passing between the 1-6th electrode TX6 and the 1-7th electrode TX7 on the 7th virtual circle C7.

A trace connected to any one of the 2-1 th electrode RX1 in the second group, a trace connected to one 2-2 electrode RX2, and a trace connected to one 2-3 th electrode RX3 in the second group include a fifth Between the 1-3 th electrode TX3 and the 1-2 th electrode TX2 on the imaginary circle C5 and the 2-5 th electrode RX5 and the 2-6 th electrode RX6 on the sixth imaginary circle C6 It is included in the trace bundle B by passing between the 1-3 th electrode TX3 and the 1-2 th electrode TX2 on the seventh virtual circle C7.

2-4 th electrodes RX4 , 2-5 th electrodes RX5 , 2-6 th electrodes RX6 , and 2-7 th electrodes RX7 disposed on the sixth virtual circle C6 are , divided into two groups (1st group and 2nd group). Each group includes RX4-RX5-RX6-RX7-RX6-RX5-RX4-RX5-RX6-RX7-RX6-RX5 sequentially clockwise on the sixth virtual circle C6. The 2-4 electrodes RX4 of each group are connected in series, and the remaining electrodes except for one electrode located at one end of the 2-5 electrodes RX5 are also connected in series, and the 2-6 electrode RX6 ) are also connected in series, and the 2-7th electrodes RX7 are also connected in series.

A trace connected to any one 2-4 electrode RX4 in the first group, a trace connected to one 2-5 electrode RX5, a trace connected to one 2-6 electrode RX6, and one second electrode RX4 The trace connected to the 2-7 electrode RX7 passes between the 1-5 electrode TX5 and the 1-6 electrode TX6 on the seventh virtual circle C7 and is included in the trace bundle B.

A trace connected to any one 2-4 electrode RX4 in the second group, a trace connected to one 2-5 electrode RX5, a trace connected to one 2-6 electrode RX6, and one second electrode The trace connected to the 2-7 electrode RX7 passes between the 1-2 th electrode TX2 and the 1-1 th electrode TX1 on the seventh virtual circle C7 and is included in the trace bundle A.

Meanwhile, one electrode located at one end of the 2-5 electrodes RX5 in the first group includes the 1-6 electrode TX6 and the 1-7 electrode TX7 on the seventh virtual circle C7 . One electrode included in the trace bundle A passing between and located at one end among the 2-5 electrodes RX5 in the second group is the 1-2 electrode TX2 on the seventh virtual circle C7. ) and the 1-3 th electrode TX3 and included in the trace bundle B.

The 2-0-th electrode RX0 on the concentric circle and the two 2-0-th electrodes RX0 on the second imaginary circle C2 are the 1-1 electrode TX1 and the first electrode TX1 on the first imaginary circle C1. It is connected through the trace between the -2 electrode TX2 and the trace between the 1-5th electrode TX5 and the 1-6th electrode TX6.

Traces connected to one 2-0 electrode RX0 among the two 2-0 electrodes RX0 on the second virtual circle C2 are formed on the third, fifth, and seventh virtual circles C3, C5, and C7. It passes between the 1-6th electrode TX6 and the 1-7th electrode TX7 and is included in the trace bundle A. Here, the trace surrounds the 1-1 electrode RX1 located in the middle in the first group on the fourth virtual circle C4, and the 2-1 th electrode RX1 and the 2-2 electrode RX1 located at one end ( It passes between RX2 , and passes between the 2-5 th electrode RX5 and the 2-6 th electrode RX6 in the first group on the sixth virtual circle C6 .

18A is a view for explaining the electrode pattern structure of the touch sensor 1850 according to another embodiment of the present invention.

The touch sensor 1850 according to another embodiment of the present invention shown in FIG. 18A , compared to the touch sensor 550 shown in FIG. 5 , includes second electrodes RX0, RX1, RX2, RX3, RX4, RX5. ) has fewer channels. Specifically, the number of channels of the second electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7 of the touch sensor 550 shown in FIG. 5 is 8, whereas the touch shown in FIG. 18A The number of channels of the second electrodes RX0 , RX1 , RX2 , RX3 , RX4 , and RX5 of the sensor 1850 is six.

In the touch sensor 550 illustrated in FIG. 5 , since the number of channels of the second electrode is greater than that of the touch sensor 1850 of FIG. 18A , the area per channel is smaller. Accordingly, the mutual capacitance change amount Cm between any adjacent first electrode and any second electrode of the touch sensor 550 of FIG. 5 is random with any adjacent first electrode of the touch sensor 1850 of FIG. 8 . is smaller than the mutual capacitance value (Cm) and the mutual capacitance variation value (ΔCm) between the second electrodes of On the other hand, since the touch sensor 1850 of FIG. 18A reduces the number of channels of the second electrodes RX0, RX1, RX2, RX3, RX4, and RX5, the area per channel is larger than that of the touch sensor 550 of FIG. 5 . wide. Accordingly, the mutual capacitance value Cm and the mutual capacitance variation value ΔCm between any adjacent first electrode and any second electrode may be increased. Furthermore, it is expected to increase the signal-to-noise ratio (SNR).

In addition, since the number of second electrodes of the touch sensor 1850 of FIG. 18A is further reduced than the number of second electrodes of the touch sensor 550 of FIG. 5 , the number of traces may also be reduced. For example, when routing and trace connection are configured in the same manner as in FIGS. 17A and 17B , the number of traces of the touch sensor 550 in FIG. 5 is 43, but the touch sensor 1850 in FIG. 18A is 39 Dogs can further reduce traces. Specifically, it will be described later with reference to FIGS. 18B and 18C.

Compared to the touch sensor 550 illustrated in FIG. 5 , the touch sensor 1850 illustrated in FIG. 18A has substantially a cross-sectional area of the second-first electrode RX1 and a cross-sectional area of the second-second electrode RX2 . can be the same. In addition, when the touch sensor 1850 shown in FIG. 18A is described by introducing the virtual circles of FIG. 4 , the cross-sectional areas of the second electrodes RX1 and RX2 positioned on the fourth virtual circle C4 are substantially the same. Alternatively, the second electrodes RX1 and RX2 positioned on the fourth virtual circle C4 may be alternately arranged.

When the virtual circles of FIG. 4 are introduced and described, any one of the first electrodes TX0 to TX7 positioned on the third virtual circle C3 is formed on the first electrode TX0 and the fifth virtual circle C5 . A portion of the second-first electrode RX1 and a portion of the second-second electrode RX2 may be disposed between the first electrode TX0 of any one of the first electrodes TX0 to TX7.

Also, in the touch sensor 1850 illustrated in FIG. 18A , the cross-sectional area of the 2-3 th electrode RX3 and the cross-sectional area of the 2-5 electrode RX5 are compared to the touch sensor 550 illustrated in FIG. 5 . may be substantially the same. The cross-sectional area of the 2-4th electrode RX4 may be half of the cross-sectional area of the 2-3rd electrode RX3 and the cross-sectional area of the 2-5th electrode RX5 In addition, the touch sensor 1850 shown in FIG. 18A is , if described by introducing the virtual circles of FIG. 4 , the second electrodes RX3 , RX4 , and RX5 positioned on the sixth virtual circle C6 may be arranged to repeat in the order of RX3-RX4-RX5-RX4. .

When the virtual circles of FIG. 4 are introduced and described, any one of the first electrodes TX0 to TX7 positioned on the fifth virtual circle C5 is formed on the first electrode TX0 and the seventh virtual circle C7. Between the first electrode TX0 of any one of the first electrodes TX0 to TX7 positioned, a part of the second-third electrode RX3, the entirety of the second-fourth electrode RX4, and the second-fifth electrode A part of (RX5) may be placed.

18B and 18C are diagrams for explaining the routing and trace connection structure of the touch sensor 1850 shown in FIG. 18A .

When the virtual circle of FIG. 4 is introduced and described, the 2-1 th electrodes RX1 and the 2-2 nd electrodes RX2 disposed on the fourth virtual circle C4 include two groups (the first group and the second electrode RX2 ). 2nd group). Each group includes RX1-RX2-RX1-RX2 sequentially arranged in a clockwise direction on the fourth virtual circle C4. The 2-1 th electrodes RX1 of each group are connected in series, and the 2-2 th electrodes RX2 are also connected in series.

A trace connected to any one of the 2-1th electrode RX1 in the first group and a trace connected to a trace connected to one 2-2nd electrode RX2 in the first group include the 1-6th electrode on the fifth imaginary circle C5. Between the TX6 and the 1-7th electrode TX7, between the 2-5th electrode RX5 and the 2-4th electrode RX4 on the 6th imaginary circle C6, and on the 7th imaginary circle C7 It passes between the 1-6 electrode TX6 and the 1-7 electrode TX7 and is included in the trace bundle A.

A trace connected to any one of the 2-1 th electrode RX1 and a trace connected to one 2 - 2 electrode RX2 in the second group are the 1-3 th electrodes TX3 on the fifth virtual circle C5 . Between the 1-2 th electrode TX2, between the 2-5 th electrode RX5 and the 2-4 th electrode RX4 on the sixth imaginary circle C6, and between the 1-3 th electrode on the 7th imaginary circle C7 It passes between the electrode TX3 and the first-second electrode TX2 and is included in the trace bundle B.

The 2-3 th electrodes RX3 , 2-4 th electrodes RX4 , and 2-5 th electrodes RX5 disposed on the sixth virtual circle C6 include two groups (a first group and a second electrode RX5 ). Divide into 2 groups). Each group includes RX3-RX4-RX5-RX4-RX3-RX4-RX5-RX4 sequentially arranged clockwise on the sixth virtual circle C6. The 2-3th electrodes RX3 of each group are connected in series, the remaining electrodes except for one electrode located at one end of the 2-4th electrodes RX4 are also connected in series, and the 2-5th electrode RX5 ) are also connected in series.

A trace connected to any one 2-3th electrode RX3, a trace connected to one 2-4 electrode RX4, and a trace connected to one 2-5 electrode RX5 in the first group include a seventh It passes between the 1st-5th electrode TX5 and the 1st-6th electrode TX6 on the virtual circle C7 and is included in the trace bundle B.

A trace connected to any one 2-3th electrode RX3 in the second group, a trace connected to one 2-4 electrode RX4, and a trace connected to one 2-5 electrode RX5 in the second group include a seventh It passes between the 1-2 th electrode TX2 and the 1-1 th electrode TX1 on the virtual circle C7 and is included in the trace bundle A.

Meanwhile, one electrode located at one end of the 2-4 electrodes RX4 in the first group includes the 1-6 electrode TX6 and the 1-7 electrode TX7 on the seventh virtual circle C7. One electrode included in the trace bundle A passing between and located at one end of the 2-4 electrodes RX4 in the second group is the 1-2 electrode TX2 on the seventh virtual circle C7. ) and the 1-3 th electrode TX3 and included in the trace bundle B.

The 2-0-th electrode RX0 on the concentric circle and the two 2-0-th electrodes RX0 on the second imaginary circle C2 are the 1-1 electrode TX1 and the first electrode TX1 on the first imaginary circle C1. It is connected through the trace between the -2 electrode TX2 and the trace between the 1-5th electrode TX5 and the 1-6th electrode TX6.

Traces connected to one 2-0 electrode RX0 among the two 2-0 electrodes RX0 on the second virtual circle C2 are formed on the third, fifth, and seventh virtual circles C3, C5, and C7. It passes between the 1-6th electrode TX6 and the 1-7th electrode TX7 and is included in the trace bundle A. Here, the trace surrounds the 1-1 electrode RX1 located in the middle in the first group on the fourth virtual circle C4, and the 2-1 th electrode RX1 and the 2-2 electrode RX1 located at one end ( It passes between the RX2 , and passes between the 2-5 th electrode RX5 and the 2-4 th electrode RX4 in the first group on the sixth virtual circle C6 .

As shown in FIG. 18C , the touch sensor 1850 of FIG. 18A may include a total of 39 traces.

19 is a view for explaining the electrode pattern structure of the touch sensor 1950 according to another embodiment of the present invention.

Compared to the touch sensor 1850 shown in FIG. 18A , the touch sensor 1950 shown in FIG. 19 includes first electrodes TX0, ..., TX7 and second electrodes RX0, ..., RX5. Although the arrangement and diameter are the same, the widths of some electrodes of the first electrodes TX0, ..., TX7 and the second electrodes RX0, ..., RX5 are different. This is to improve coordinate accuracy in the outer portion of the touch sensor 1850 of FIG. 18A .

When the virtual circles of FIG. 4 are introduced and described, the touch sensor 1950 shown in FIG. 19 is compared with the touch sensor 1850 shown in FIG. 18A , the third virtual circle C3 and the fifth virtual circle ( The widths of the first electrodes TX0, ..., TX7 positioned on C5 are longer, whereas the second electrodes RX1, . . . , RX5 are narrower, and the widths of the first electrodes TX0, ..., TX7 positioned on the seventh virtual circle are narrower.

Specifically, the touch sensor 1950 illustrated in FIG. 19 , compared to the touch sensor 1850 illustrated in FIG. 18A , the first electrode positioned on the third virtual circle C3 and the fifth virtual circle C5 . The widths of the electrodes TX0, ..., TX7 are 0.2 mm longer, while the widths of the second electrodes RX1, ..., RX5 positioned on the fourth virtual circle C4 and the sixth virtual circle C6 are 0.1 mm narrower, and the widths of the first electrodes TX0, ..., TX7 positioned on the seventh virtual circle are 0.5 mm narrower.

The routing and trace connection structure of the touch sensor 1950 shown in FIG. 19 may be configured as shown in FIGS. 18B and 18C .

Comparing the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 , based on the touch sensor 550 shown in FIG. 5 , FIG. 18A . The touch sensor 1850 of , increases the cross-sectional area of the second electrodes RX0, ..., RX5 by reducing the number of RX channels. Accordingly, the touch sensor 1850 shown in FIG. 18A may increase the mutual capacitance value Cm and the mutual capacitance change amount ΔCm more than the touch sensor 550 of FIG. 5 . Meanwhile, since the touch sensor 1950 of FIG. 19 has the same arrangement of electrodes as the touch sensor 1850 of FIG. 18A , characteristics similar to those of the touch sensor 1850 of FIG. 18A may be obtained.

Table 2 below shows the characteristics of the touch sensor 150 shown in FIG. 2 , the touch sensor 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 . This is a comparison table. In Table 2 below, the touch sensor_1 of FIG. 5 is due to the routing and trace connection of FIGS. 11 or 13 , and the touch sensor_2 of FIG. 5 is due to the routing and trace connection of FIGS. 16 and 17 .

2 touch sensor Touch sensor _1 in Fig. 5 Touch sensor_2 of Fig. 5 18a touch sensor 19 touch sensor Diameter [mm] 35 35 35 35 35 Channel TX 8 8 8 8 8 RX 8 8 8 6 6 Trace Count (including ESD and GUARD) 26 37 43 39 39 Is the trace coupling regular and can be removed from SW? N/A Need verification
Need verification
Need verification Need verification Max number of traces between TX-RX N/A 9 (540um) 6 (380um) 5 (320um) 5 (320um) Max number of traces between RX-RX N/A 14 7 7 7 Max number of traces between TX-TX N/A 6 7 6 6 Pattern No odd channels? O O O O O No disappearance of center coordinates in differential sensing mode? O X X X X Self orthogonality possible? (No need to multiply) O X X X X Is Cm uniform? X O O O O uniform shape? Is the self cap for each sensor the same? X O O O O All below 200pF? O O O O O Edge coordinates possible? (Wheel function) X O O O O No mix of half node and full node? O △ △ △ △ Distinguishable between 5 pie touches and water droplets in the center area? O O O O O Simulation results (Sim.) Average Cm(fF) N/A 178 211 285 295 Average Cs(TX)(pF) N/A 95.4 104 124 124 Average Cs(RX)(pF) N/A 97.8 104 124 123 Max Delta Cm(fF) N/A 56.6 66.1 101.3 107.3 Max Delta Cm/C(%) N/A 31.8 31.3 35.5 36.4 Min Delta Cm(fF) N/A 34.0 38.5 49.2 48.5 Min Delta Cm/C(%) N/A 19.1 18.2 17.3 16.4 Sim.1(Line) Max error (mm) (≤ 1.00mm) N/A - 0.29 0.36 0.21 RMS error (mm) (≤ 1.00mm) N/A - 0.12 0.15 0.10 Sim.2(R) Max error (mm) (≤ 1.00mm) N/A - 0.39 0.46 0.23 RMS error (mm) (≤ 1.00mm) N/A - 0.12 0.12 0.11 Sim.3 (Theta) Max error (mm) (≤ 1.00mm) N/A - 0.51 0.59 0.33 RMS error (mm) (≤ 1.00mm) N/A - 0.50 0.57 0.30

20 shows simulation environments for obtaining the simulation results described in Table 2, and reflects the YOCTA stack-up.

FIG. 21 shows the touch sensor_2 550 shown in FIG. 5, the touch sensor 1850 shown in FIG. 18A, and the touch sensor 1950 shown in FIG. 19 in order to obtain the simulation results shown in Table 2. It is a simulation that confirms the base mutual capacitance value (Cm) in an untouched state. The solid line is a point indicating the optimal amount of mutual capacitance change, and the dotted line is a point indicating the worst amount of mutual capacitance change.

In FIG. 21, each candidate group of Max diff node and min diff node is selected and simulated, and as shown in Table 2, among them, max delta Cm and min delta Cm can be arranged, and the self-capacitance value (Cs) for each sensor ) could be compared.

22A to 22C show actual simulation output data in the state of FIG. 21 . Specifically, (a) of FIG. 22 is simulation output data of the touch sensor_2 550 shown in FIG. 5, and FIG. 22(b) is simulation output data of the touch sensor 1850 shown in FIG. 18A. , (c) of FIG. 22 is simulation output data of the touch sensor 1950 shown in FIG.

Referring to the table of (a) of FIG. 22 , it was confirmed that the average Cm (Average Cm) was approximately 211 (fF). On the other hand, referring to the table of FIG. 22(b), it was confirmed that the average Cm (Average Cm) was approximately 285(fF), which was increased by approximately 35% compared to the average Cm of FIG. 22(a), and FIG. Referring to the table of (c) of Figure 22, it was confirmed that the average Cm (Average Cm) was about 295 (fF), which was increased by about 39.8% compared to the average Cm of Figure 22 (a).

23A to 23C show mutual capacitance in the touch sensor_2 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 . These are graphs comparing how much Cm changes at the point where the amount of change (ΔCm) occurs as the maximum (Max) and the minimum (Min). Specifically, (a) of FIG. 23 is simulation output data of the touch sensor_2 550 shown in FIG. 5, and FIG. 23(b) is simulation output data of the touch sensor 1850 shown in FIG. 18A. , (c) of FIG. 23 is simulation output data of the touch sensor 1950 shown in FIG.

In (a) of FIG. 23, the maximum mutual capacitance change (Max delta Cm) was 66.1 (fF), Max Delta Cm/C was confirmed to be 31.3%, and the minimum mutual capacitance change amount (Min delta Cm) was 38.5 ( fF), and Min Delta Cm/C was found to be 18.2%.

In (b) of FIG. 23, the maximum mutual capacitance change (Max delta Cm) was 101.3 (fF), Max Delta Cm/C was confirmed to be 35.5%, and the minimum mutual capacitance change amount (Min delta Cm) was 49.2 ( fF), and Min Delta Cm/C was found to be 17.3%. Based on these results, in the touch sensor 1850 of FIG. 18A , the Max delta Cm is an increase of about 53% and the Min delta Cm is an increase of about 27%, compared to the touch sensor_2 550 of FIG. 5 . can be checked

In (c) of FIG. 23, the maximum mutual capacitance change (Max delta Cm) was 107.3 (fF), Max Delta Cm/C was confirmed to be 36.4%, and the minimum mutual capacitance change amount (Min delta Cm) was 48.5 ( fF), and Min Delta Cm/C was found to be 16.4%. Based on these results, in the touch sensor 1950 of FIG. 19 , the Max delta Cm is an increase of approximately 63%, and the Min delta Cm is an increase of approximately 25% compared to the touch sensor_2 550 of FIG. 5 . can be checked

24 (a) to (c) are self-electrostatic in each of the touch sensor_2 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 . This is the output data that simulates the capacity (Cs). Specifically, (a) of FIG. 24 is simulation output data of the touch sensor_2 550 shown in FIG. 5, and FIG. 24 (b) is simulation output data of the touch sensor 1850 shown in FIG. 18A. , (c) of FIG. 24 is simulation output data of the touch sensor 1950 shown in FIG.

24 (a) to (c), as a whole, uniform Cs in the first electrodes (TX0, ..., TX7) and the second electrodes (RX0, ..., RX7, or RX0, ..., RX5) It can be confirmed that the value is output.

25 is a touch sensor_2 550 shown in FIG. 5 to obtain the results of simulation 1 (Sim.1), simulation 2 (Sim.2), and simulation 3 (Sim.3) described in Table 2, FIG. Three simulations (Sim.1, Sim.2, Sim.3) were performed with 5 phi conductive rods for the touch sensor 1850 shown in 18a and the touch sensor 1950 shown in FIG. 19, respectively. look.

Referring to FIG. 25 , the left figure shows a straight line touch, the middle figure shows theta line touch, and the right figure shows a wheel touch.

The result values of simulation 1 (Sim.1), simulation 2 (Sim.2), and simulation 3 (Sim.3) shown in Table 2 are compared by calculating the max/rms value of accuracy at each simulation point. did it

26 shows the touch sensor_2 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 by performing a straight line touch in the left drawing of FIG. It is a diagram simulating the maximum error and the RMS error in one case, and FIG. 27 is the maximum error and the RMS error for each position (1, 2, 3, 4). It is a graph. In FIG. 26, (a) is the touch sensor_2 550 shown in FIG. 5, (b) is the touch sensor 1850 shown in FIG. 18A, (c) is the touch sensor shown in FIG. 19 ( 1950) means.

As shown in FIGS. 26 and 27, by adjusting the width of the electrodes of the touch sensor 1950 shown in FIG. It was confirmed that it can be further reduced than the sensors 550 and 1850.

28 shows the theta line touch in the middle view of FIG. 25 to the touch sensor_2 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 , respectively. It is a diagram simulating the maximum error and the RMS error in one case, and FIG. 29 is a graph of the maximum error and the RMS error for each angle (1, 2, 3). . 28, (a) is the touch sensor_2 550 shown in FIG. 5, (b) is the touch sensor 1850 shown in FIG. 18A, (c) is the touch sensor shown in FIG. 19 ( 1950) means.

As shown in FIGS. 28 and 29, by adjusting the width of the electrodes of the touch sensor 1950 shown in FIG. It was confirmed that it can be further reduced than that at 550 and the touch sensor 1850 of FIG. 18A .

30 shows that the wheel touch of the right drawing of FIG. 25 is performed on the touch sensor_2 550 shown in FIG. 5 , the touch sensor 1850 shown in FIG. 18A , and the touch sensor 1950 shown in FIG. 19 , respectively. It is a diagram simulating the maximum error and the RMS error in the case of the case, and FIG. 31 is a graph of the maximum error and the RMS error for each wheel position 1 and 2 . In FIG. 30, (a) is the touch sensor_2 550 shown in FIG. 5, (b) is the touch sensor 1850 shown in FIG. 18A, (c) is the touch sensor shown in FIG. 19 ( 1950) means.

30 and 31 , by adjusting the widths of the electrodes of the touch sensor 1950 shown in FIG. It was confirmed that it can be further reduced than that at 550 and the touch sensor 1850 of FIG. 18A .

32 is a view for explaining the electrode pattern structure of the touch sensor 3250 according to another embodiment of the present invention.

Referring to FIG. 32 , a touch sensor 3250 according to another embodiment of the present invention includes second electrodes ( excluding the 2-0 th electrode RX0 ) compared to the touch sensor 350 illustrated in FIG. 3 . There is a difference in configuration in RX1, RX2, RX3, RX4, RX5, RX6, RX7).

Specifically, when the virtual circles shown in FIG. 7 are introduced and described, the touch sensor 3250 of FIG. 32 includes the 2-1 th electrodes RX1 and 2-2 th electrodes disposed on the fourth virtual circle C4. The electrodes RX2 and 2-3 electrodes RX3 are included, and are arranged so that the sequence of RX1-RX2-RX3 is repeated. And, any one of the first electrodes TX0 to TX7 on the third imaginary line C3 and any one of the first electrodes TX0 to TX7 on the fifth imaginary line C5 One 2-1 th electrode RX1 , one 2 - 2 electrode RX2 , and one 2-3 th electrode RX3 are disposed between TX0 . Here, one 2-1 th electrode RX1 , one 2-2 electrode RX2 , and one 2-3 th electrode RX3 may have substantially the same cross-sectional area.

The touch sensor 3250 of FIG. 32 includes 2-4 th electrodes RX4 , 2-5 th electrodes RX5 , 2-6 th electrodes RX6 , and It includes the 2-7th electrodes RX7, and is arranged so that the sequence of RX4-RX5-RX6-RX7 is repeated. And, any one electrode TX0 of the first electrodes TX0 to TX7 on the fifth imaginary line C5 and any one electrode among the first electrodes TX0 to TX7 on the seventh imaginary line C7 One 2-4 electrode RX4 , one 2-5 electrode RX5 , one 2-6 electrode RX6 , and one 2-7 electrode RX7 are disposed between TX0 do. Here, one 2-4 electrode RX4 , one 2-5 electrode RX5 , one 2-6 electrode RX6 , and one 2-7 electrode RX7 are substantially the same as each other. It may have a cross-sectional area.

FIG. 33 is a diagram showing a routing and trace connection structure of the touch sensor 3250 shown in FIG. 32 .

Referring to FIG. 33 by introducing the virtual circle of FIG. 4 , the 2-1 th electrodes RX1 disposed on the fourth imaginary circle C4 are connected in parallel to each other through traces, and the 2-3 th electrode RX3 ) are also connected in parallel to each other through traces. Meanwhile, the 2-2 electrodes RX2 are connected in series through a trace.

The 2-1 th electrodes RX1 are connected in parallel through a trace connected to one side of each of the 2-1 th electrodes RX1 , and the 2-3 th electrodes RX3 are respectively connected with the 2-3 th electrodes RX3 . They are connected in parallel through a trace connected to the other side of them. In addition, the 2-2nd electrodes RX2 are connected in series to adjacent ones, and the trace connecting the two 2-2nd electrodes RX2 that are overlapped with each other is the two 2-2 electrodes RX2 that are overlapped with each other. It passes between the 2-3 th electrode RX3 and the 2-1 th electrode RX1 disposed therebetween.

2-4 th electrodes RX4 disposed on the sixth virtual circle C6 are connected in parallel to each other through traces, and 2-7 th electrodes RX7 are also connected to each other in parallel through traces. Meanwhile, the 2-5 electrodes RX5 are connected in series through a trace, and the 2-6 electrodes RX6 are also connected in series through a trace.

The 2-4th electrodes RX4 are connected in parallel through a trace connected to one side of each of the 2-4th electrodes RX4 , and the 2-7th electrodes RX7 are respectively connected to the 2-7th electrodes RX7 . They are connected in parallel through a trace connected to the other side of them. And, the 2-5th electrodes RX5 are connected in series with each other, and the trace connecting the two 2-5th electrodes RX5 that are overlapped with each other is the two 2-5th electrodes RX5 that are overlapped with each other. It passes between the 2-7th electrode RX7 and the 2-4th electrode RX4 disposed therebetween. Also, the 2-6th electrodes RX6 are connected in series to adjacent ones, and the trace connecting the two 2-6th electrodes RX6 that are overlapped with each other is the two 2-6 electrodes RX6 that are overlapped with each other. It passes between the 2-7th electrode RX7 and the 2-4th electrode RX4 disposed therebetween.

On the other hand, as another embodiment of the present invention, the second electrodes RX1, RX2, RX3, RX4, excluding the 2-0 electrode RX0 shown in FIG. 32 in the touch sensor 550 shown in FIG. The arrangement structure and routing structure of RX5, RX6, RX7) may be introduced.

34 is a view for explaining the electrode pattern structure of the touch sensor 3450 according to another embodiment of the present invention.

Referring to FIG. 34 , the touch sensor 3450 according to another embodiment of the present invention has a configuration difference in that the number of channels of the second electrodes is reduced compared to the touch sensor 3250 illustrated in FIG. 2 .

Specifically, in the touch sensor 3250 of FIG. 32 , the second electrodes RX0 to RX7 constitute 8 channels, whereas in the touch sensor 3450 of FIG. 34 , the second electrodes RX0 to RX5 constitute 6 channels. make up

When the virtual circles shown in FIG. 7 are introduced and described, the touch sensor 3450 of FIG. 34 includes the 2-1 th electrodes RX1 and the 2-2 th electrodes RX2 disposed on the fourth virtual circle C4 . ), and the sequence of RX1-RX2 is arranged to repeat. And, any one electrode TX0 of the first electrodes TX0 to TX7 on the third virtual line C3 and any one electrode among the first electrodes TX0 to TX7 on the fifth virtual line C5 One 2-1 th electrode RX1 and one 2-2 th electrode RX2 are disposed between TX0. Here, one 2-1 electrode RX1 and one 2-2 electrode RX2 may have substantially the same cross-sectional area.

The touch sensor 3450 of FIG. 34 includes 2-3 th electrodes RX3 , 2-4 th electrodes RX4 , and 2-5 th electrodes RX5 disposed on the sixth virtual circle C6 . However, the sequence of RX3-RX4-RX5 is arranged to be repeated. And, any one electrode TX0 of the first electrodes TX0 to TX7 on the fifth imaginary line C5 and any one electrode among the first electrodes TX0 to TX7 on the seventh imaginary line C7 One 2-3 th electrode RX3 , one 2-4 electrode RX4 , and one 2-5 electrode RX5 are disposed between TX0 . Here, one 2-4 electrode RX3 , one 2-4 electrode RX4 , and one 2-5 electrode RX5 may have substantially the same cross-sectional area.

FIG. 35 is a diagram illustrating a routing and trace connection structure of the touch sensor 3450 shown in FIG. 34 .

Referring to FIG. 35 by introducing the virtual circle of FIG. 4 , the second-first electrodes RX1 disposed on the fourth virtual circle C4 are connected in parallel to each other through traces, and the second-second electrode RX2 ) are also connected in parallel to each other through traces.

The 2-1 th electrodes RX1 are connected in parallel through a trace connected to one side of each of the 2-1 th electrodes RX1 , and the 2-3 th electrodes RX3 are respectively connected with the 2-3 th electrodes RX3 . They are connected in parallel through a trace connected to the other side of them.

The 2-3rd electrodes RX3 disposed on the sixth virtual circle C6 are connected in parallel to each other through a trace, and the 2-5th electrodes RX5 are also connected to each other in parallel through a trace. Meanwhile, the 2-4 electrodes RX4 are connected in series through a trace.

The 2-3rd electrodes RX3 are connected in parallel through a trace connected to one side of each of the 2-3rd electrodes RX3 , and the 2-5th electrodes RX5 are respectively connected to the 2-5th electrodes RX5 . They are connected in parallel through a trace connected to the other side of them. In addition, the 2-4th electrodes RX4 are connected in series with each other, and the trace connecting the two 2-4th electrodes RX4 that are overlapped with each other is the two 2-4th electrodes RX4 that are overlapped with each other. It passes between the 2-5 th electrode RX5 and the 2-3 th electrode RX3 disposed therebetween.

On the other hand, as another embodiment of the present invention, the second electrodes RX1, RX2, RX3, RX4, excluding the 2-0 electrode RX0 shown in FIG. 34 in the touch sensor 550 shown in FIG. The arrangement structure and routing structure of RX5) may be introduced.

Features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiment has been mainly described in the above, this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains to the above in the range that does not depart from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications not illustrated are possible. For example, each component specifically shown in the embodiment can be implemented by deformation|transformation. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: smart watch
150, 350, 550, 1850, 1950, 3250, 3450: Touch sensor

Claims (18)

Includes a circular touch sensor,
The touch sensor includes a plurality of electrodes disposed on a single layer and spaced apart from each other on a plurality of virtual circles having a common center.
The method of claim 1,
The plurality of virtual circles include first to seventh virtual circles,
The plurality of electrodes includes a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes includes 1-0 to 1-7 electrodes disposed in each of first, 3, 5, and 7 virtual circles among the first to seventh virtual circles,
The plurality of second electrodes,
one or more 2-0 electrodes disposed on the second virtual circle;
a plurality of second-first electrodes, a plurality of second-second electrodes, and a plurality of second-third electrodes disposed on the fourth virtual circle;
a plurality of second-4 electrodes, a plurality of second-5 electrodes, a plurality of second-6 electrodes, and a plurality of second-7 electrodes disposed on the sixth virtual circle;
Including, a touch input device.
3. The method of claim 2,
When the touch sensor is driven in the mutual driving mode,
The plurality of first electrodes is any one of a driving electrode for outputting a driving signal and a receiving electrode for receiving a sensing signal, and the plurality of second electrodes is the other one.
3. The method of claim 2,
The plurality of second-first electrodes, the plurality of second-second electrodes, and the plurality of second-third electrodes are, -2 arranged so that the arrangement order of the electrodes is repeated,
The plurality of second-4 electrodes, the plurality of second-5 electrodes, the plurality of second-6 electrodes, and the plurality of second-7 electrodes are, The electrode-second-6 electrode-second-7 electrode-second-6 electrode-second-5 electrode arranged so that the arrangement sequence is repeated.
5. The method of claim 4,
A cross-sectional area of the 2-1 electrode and the 2-3 electrode is larger than a cross-sectional area of the 2-2 electrode;
cross-sectional areas of the 2-4 electrode and the 2-7 electrode are larger than the cross-sectional areas of the 2-5 electrode and the 2-6 electrode;
any one of the 1-0 to 1-7 electrodes disposed on the third virtual circle and any one of the 1-0 to 1-7 electrodes disposed on the fifth virtual circle A part of the 2-1 electrode, all of the 2-2 electrode, and a part of the 2-3 electrode are disposed between the electrodes,
any one of 1-0 to 1-7 electrodes disposed on the fifth imaginary circle and any one of 1-0 to 1-7 electrodes disposed on the 7th imaginary circle A part of the 2-4th electrode, a part of the 2-5th electrode, all of the 2-6th electrode, and a part of the 2-7th electrode are disposed between the electrodes.
3. The method of claim 2,
The plurality of 2-1 electrodes, the plurality of 2-2 electrodes, and the plurality of 2-3 electrodes are arranged in an arrangement order of a 2-1 electrode - a 2-2 electrode - a 2-3 electrode is arranged to repeat,
The plurality of second-4 electrodes, the plurality of second-5 electrodes, the plurality of second-6 electrodes, and the plurality of second-7 electrodes are, A touch input device, arranged such that the arrangement sequence of the electrode-second-6 electrode-second-7 electrode is repeated.
7. The method of claim 6,
cross-sectional areas of the 2-1 electrode, the 2-2 electrode, and the 2-3 electrode are the same as each other;
The cross-sectional areas of the 2-4 electrode, the 2-5 electrode, the 2-6 electrode, and the 2-7 electrode are the same as each other,
any one of the 1-0 to 1-7 electrodes disposed on the third virtual circle and any one of the 1-0 to 1-7 electrodes disposed on the fifth virtual circle Between the electrodes, the 2-1 th electrode, the 2-2 electrode, and the 2-3 th electrode are disposed,
any one of 1-0 to 1-7 electrodes disposed on the fifth imaginary circle and any one of 1-0 to 1-7 electrodes disposed on the 7th imaginary circle The 2-4th electrode, the 2-5th electrode, the 2-6th electrode, and the 2-7th electrode are disposed between the electrodes.
8. The method according to any one of claims 2 to 7,
The 2-0 electrode is further disposed on the center of the touch input device.
The method of claim 1,
The plurality of virtual circles include first to seventh virtual circles,
The plurality of electrodes includes a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes includes 1-0 to 1-7 electrodes disposed in each of first, 3, 5, and 7 virtual circles among the first to seventh virtual circles,
The plurality of second electrodes,
one or more 2-0 electrodes disposed on the second virtual circle;
a plurality of 2-1 electrodes and a plurality of 2-2 electrodes disposed on the fourth virtual circle;
a plurality of second-3 electrodes, a plurality of second-4 electrodes, and a plurality of second-5 electrodes disposed on the sixth virtual circle;
Including, a touch input device.
10. The method of claim 9,
When the touch sensor is driven in the mutual driving mode,
The plurality of first electrodes is any one of a driving electrode for outputting a driving signal and a receiving electrode for receiving a sensing signal, and the plurality of second electrodes is the other one.
10. The method of claim 9,
The plurality of 2-1 electrodes and the plurality of 2-2 electrodes are arranged such that the arrangement order of the 2-1 electrode-the 2-2 electrode is repeated;
The plurality of second-3 electrodes, the plurality of second-4 electrodes, and the plurality of second-5 electrodes may include a 2-3th electrode-2-4th electrode-2-5th electrode-second - Arranged so that the arrangement order of the electrodes is repeated, the touch input device.
10. The method of claim 9,
Cross-sectional areas of the 2-1 electrode and the 2-2 electrode are the same as each other,
The cross-sectional areas of the 2-3rd electrode and the 2-5th electrode are the same as each other,
a cross-sectional area of the 2-4 electrode is half of the cross-sectional area of the 2-3 electrode and the 2-5 electrode;
any one of the 1-0 to 1-7 electrodes disposed on the third virtual circle and any one of the 1-0 to 1-7 electrodes disposed on the fifth virtual circle Between the electrodes, a part of the 2-1 electrode and a part of the 2-2 electrode are disposed,
any one of 1-0 to 1-7 electrodes disposed on the fifth imaginary circle and any one of 1-0 to 1-7 electrodes disposed on the 7th imaginary circle A part of the 2-3th electrode, all of the 2-4th electrode, and a part of the 2-5th electrode are disposed between the electrodes.
10. The method of claim 9,
Cross-sectional areas of the 2-1 electrode and the 2-2 electrode are the same as each other,
The cross-sectional areas of the 2-3rd electrode, the 2-4th electrode, and the 2-5th electrode are the same as each other,
any one of the 1-0 to 1-7 electrodes disposed on the third virtual circle and any one of the 1-0 to 1-7 electrodes disposed on the fifth virtual circle Between the electrodes, the 2-1 electrode and the 2-2 electrode are disposed,
any one of 1-0 to 1-7 electrodes disposed on the fifth imaginary circle and any one of 1-0 to 1-7 electrodes disposed on the 7th imaginary circle The 2-3th electrode, the 2-4th electrode, and the 2-5th electrode are disposed between the electrodes.
14. The method according to any one of claims 10 to 13,
The 2-0 electrode is further disposed on the center of the touch input device.
A plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes may include: first electrodes of a first group; a second group of first electrodes surrounding the first group of electrodes; a third group of first electrodes surrounding the second group of first electrodes; and a fourth group of first electrodes surrounding the third group of first electrodes;
The plurality of second electrodes may include one or a plurality of 2-0 second electrodes disposed between the first electrodes of the first group and the first electrodes of the second group; a plurality of 2-1 electrodes, a plurality of 2-2 electrodes, and a plurality of second-3 electrodes disposed between the first electrodes of the second group and the first electrodes of the third group; and a plurality of second-4 electrodes, a plurality of second-5 electrodes, a plurality of second-6 electrodes disposed between the first electrodes of the third group and the first electrodes of the fourth group; and A touch sensor, including; a plurality of second-7 electrodes.
A plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes may include: first electrodes of a first group; a second group of first electrodes surrounding the first group of electrodes; a third group of first electrodes surrounding the second group of first electrodes; and a fourth group of first electrodes surrounding the third group of first electrodes;
The plurality of second electrodes may include one or a plurality of 2-0 second electrodes disposed between the first electrodes of the first group and the first electrodes of the second group; a plurality of 2-1 electrodes and a plurality of 2-2 electrodes disposed between the first electrodes of the second group and the first electrodes of the third group; and a plurality of second-3 electrodes, a plurality of second-4 electrodes, and a plurality of second-5 electrodes disposed between the first electrodes of the third group and the first electrodes of the fourth group; Including, a touch sensor.
17. The method according to claim 15 or 16,
The plurality of first electrodes are any one of a driving electrode outputting a driving signal and a receiving electrode receiving a sensing signal, and the plurality of second electrodes is the other one.
17. The method according to claim 15 or 16,
The 2-0 electrode is further disposed in a region surrounded by the first electrodes of the first group, the touch sensor.

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