KR102580500B1 - 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 specifically, to a touch sensor formed of a circular single layer and a touch input device including the same.
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 includes a plurality of electrodes arranged to be spaced apart from each other on a plurality of virtual circles having a common center. Includes.

Description

Touch sensor and touch input device including same {TOUCH SENSOR AND TOUCH INPUT DEVICE THEREOF}

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

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

As technology advances, the development of wearable computers is accelerating. A wearable computer refers to a computer that can be worn naturally on the body like clothes, watches, glasses, or accessories.

Smartphones and tablet PCs can be conveniently used with just a finger or a touch pen, but there can be the inconvenience of having to carry them in a pocket or bag or in one's hand.

In contrast, wearable computers can be more portable than smartphones or tablet PCs because they can be worn on the wrist or worn like glasses. In particular, a variety of products are emerging for wrist watches, or smart watches, which are a type of wearable computer and a type of touch input device that can wirelessly search for various services such as diaries, messages, notifications, and stock quotes. In particular, among conventional smart watches, there are products with a circular touch screen. An example will be described with reference to FIG. 1 .

FIG. 1 is a perspective view of an example of a conventional smart watch, and FIG. 2 is a diagram showing the 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 with a pattern as shown in FIG. 2 .

The pattern of the touch sensor 150 shown in FIG. 2 has driving electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged in a single layer along the column direction, and rows Receiving electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7) are arranged along the direction. As such, 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, RX7) are arranged to be orthogonal to each other (hereinafter referred to as 'orthogonal pattern').

In the touch sensor 150 having a conventional orthogonal pattern structure shown in FIG. 2, touch electrodes (hereinafter referred to as 'distortion electrodes') that do not have a complete diamond-shaped shape are disposed at the edges of the touch sensor 150. Because of this, there is a problem that touch sensing performance is deteriorated at the edges where the distortion electrodes are located. This problem is particularly problematic in that when the edge of the touch sensor 150 is slid clockwise or counterclockwise (hereinafter referred to as 'wheel touch'), the sensing signal becomes weaker or disappears, causing a specific problem caused by the wheel touch. A problem occurs where the function does not run.

In addition, because the shapes of the touch electrodes located in the center of the touch sensor 150 and the shapes of the distortion electrodes are different, when the touch sensor 150 is driven in mutual mode, there is a gap between adjacent driving electrodes and receiving electrodes. The mutual capacitance change (Cm) is not uniform.

In addition, when the touch sensor 150 is driven in self mode, which senses the change in self capacitance (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 shapes of the touch electrodes located in and the shapes of the distortion electrodes are different, there is also a problem in that the amount of self-capacitance change (Cs) in all electrodes is not the same.

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

The problem to be solved by the present invention is to provide a touch sensor that can improve the touch sensing performance of the edge portion 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 to provide a touch sensor with uniform mutual capacitance change (Cm) or/and self-capacitance change (Cs) at each electrode in a circular touch sensor and a touch input device including the same. to provide.

In addition, the problem to be solved by the present invention is to provide a touch sensor that can reduce the power consumption of a circular touch sensor and a touch input device including the same.

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

Additionally, a touch sensor capable of providing a routing method and trace connection structure for 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 arranged on a single layer and arranged at a predetermined interval in a plurality of rings or a plurality of ring shapes having a common center. Contains multiple electrodes.

Here, an additional circular electrode may be 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 is disposed on a single layer and includes a plurality of electrodes arranged to be spaced apart from each other on a plurality of virtual circles having a common center. Includes.

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: a first group of first electrodes; a second group of first electrodes surrounding the first group of first 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 include the first group of first electrodes and the second group of first electrodes. one or a plurality of 2-0 electrodes disposed between; a plurality of 2-1 electrodes, a plurality of 2-2 electrodes and a plurality of 2-3 electrodes disposed between the second group of first electrodes and the third group of first electrodes; and a plurality of 2-4 electrodes, a plurality of 2-5 electrodes, a plurality of 2-6 electrodes disposed between the third group of first electrodes and the fourth group of first electrodes, and It includes 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: a first group of first electrodes; a second group of first electrodes surrounding the first group of first 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 include the first group of first electrodes and the second group of first electrodes. one or a plurality of 2-0 electrodes disposed between; a plurality of 2-1 electrodes and a plurality of 2-2 electrodes disposed between the second group of first electrodes and the third group of first electrodes; and a plurality of 2-3 electrodes, a plurality of 2-4 electrodes and a plurality of 2-5 electrodes disposed between the third group of first electrodes and the fourth group of first electrodes; Includes.

Using a touch input device according to an embodiment of the present invention has the advantage of improving touch sensing performance at the edge of a circular touch sensor.

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

Additionally, there is an advantage in reducing the power consumption of the circular touch sensor.

Additionally, there is an advantage of being able to sense whether a touch is made at the center of the circular touch sensor. Furthermore, there is an advantage of being able to distinguish between water droplets and touches.

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

Figure 1 is a perspective view of an example of a conventional smart watch.
FIG. 2 is a diagram showing the pattern structure of a touch sensor included in the smart watch shown in FIG. 1.
FIG. 3 is a diagram for explaining the electrode pattern structure of the touch sensor 350 according to an embodiment of the present invention.
FIG. 4 is an auxiliary diagram for explaining the arrangement structure of a plurality of electrodes (TX0,..., TX7, RX0,..., RX7) included in the touch sensor 350 shown in FIG. 3.
FIG. 5 is a diagram 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 problems that may occur in the touch sensor 350 shown in FIG. 3.
FIGS. 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.
FIG. 11 is a diagram for explaining the number of traces of a touch sensor according to embodiments of the present invention.
FIG. 12 is a diagram showing another example of FIG. 9.
FIG. 13 is a diagram for explaining the routing and 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.
FIGS. 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.
FIG. 18A is a diagram for explaining the electrode pattern structure of the touch sensor 1850 according to another embodiment of the present invention.
FIGS. 18B and 18C are diagrams for explaining the routing and trace connection structure of the touch sensor 1850 shown in FIG. 18A.
FIG. 19 is a diagram for explaining the electrode pattern structure of the touch sensor 1950 according to another embodiment of the present invention.
Figure 20 shows simulation environments for obtaining the simulation results listed in Table 2, reflecting the YOCTA stack-up.
FIG. 21 shows that, in order to obtain the results of the simulation 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. This is a simulation showing the base mutual capacitance value (Cm) in an untouched state.
Figures 22 (a) to (c) show actual simulation output data in the state of Figure 21.
23 (a) to (c) show the mutual capacitance change amount ( These are graphs comparing how much Cm changes at the points where ΔCm) reaches its maximum (Max) and minimum (Min).
24 (a) to (c) show self-capacitance ( This is output data that simulates Cs).
Figure 25 shows the touch sensor 550 shown in Figure 5 and Figure 18a in order to obtain the results of Simulation 1 (Sim.1), Simulation 2 (Sim.2), and Simulation 3 (Sim.3) shown in Table 2. Three simulations (Sim.1, Sim.2, Sim.3) were performed using a 5 phi conductive rod for each of the touch sensor 1850 shown and the touch sensor 1950 shown in FIG. 19. .
FIG. 26 shows a case where the straight line touch shown on the left side 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. This is a diagram simulating the maximum error and RMS error.
Figure 27 is a graph of maximum error and RMS error for each position (1, 2, 3, 4).
FIG. 28 shows a case where the theta line touch in the middle diagram 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. This is a diagram simulating the maximum error and RMS error.
Figure 29 is a graph of the maximum error and RMS error for each angle (1, 2, 3).
FIG. 30 shows a case where the wheel touch shown on the right side 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. This is a diagram simulating the maximum error and RMS error.
Figure 31 is a graph of maximum error and RMS error for each wheel position (1, 2).
FIG. 32 is a diagram 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 the routing and trace connection structure of the touch sensor 3250 shown in FIG. 32.
Figure 34 is a diagram for explaining the electrode pattern structure of the touch sensor 3450 according to another embodiment of the present invention.
FIG. 35 is a diagram showing the routing and trace connection structure of the touch sensor 3450 shown in FIG. 34.

The detailed description of the present invention described below refers to the accompanying drawings, which show by way of example specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable any person skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different from one another but are not necessarily mutually exclusive. For example, specific shapes, structures and characteristics described herein may be implemented in one embodiment or another without departing from the spirit and scope of the invention. Additionally, 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 invention. Accordingly, the detailed description that follows is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, together with all equivalents to what those claims assert, if properly described. Similar reference numbers in the drawings refer to identical or similar functions across 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 the touch sensor and the 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 can also be applied to a touch input device having a touch screen of a shape similar to a circle, for example, an oval or rectangular shape. Hereinafter, it will be described in detail with reference to the drawings.

FIG. 3 is a diagram 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 includes a plurality of electrodes (TX0,..., TX7, RX0, ..., RX7).

A plurality of electrodes (TX0,..., TX7, RX0,..., RX7) may be arranged 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. A plurality of electrodes (TX0,..., TX7, RX0,..., RX7) arranged in the circle may be arranged in a predetermined arrangement.

A plurality of electrodes (TX0,..., TX7, RX0,..., RX7) include 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). It includes 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 mutual sensing mode, a plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) output a touch driving signal. It may be a driving electrode that receives a detection signal, and the plurality of second electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7) may be a receiving electrode that receives a detection signal. Here, conversely, a plurality of first electrodes may be receiving electrodes and a plurality of second electrodes may be driving electrodes.

Meanwhile, when the touch sensor 350 according to an embodiment of the present invention is driven in self-sensing mode, a plurality of electrodes (TX0,..., TX7, RX0,..., RX7) output a touch driving signal. And a detection signal can be received.

A plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) may be grouped into one group, and the touch sensor 350 may be connected to the first electrodes (TX0, TX1) grouped in this way. , TX2, TX3, TX4, TX5, TX6, TX7) may be included in plural numbers. 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. The corresponding first electrodes (eg, TX0) of each group may be electrically connected through a trace.

The first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) of the first group may be arranged in a circular shape and spaced apart from each other in the center. Each of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7) may have a fan-shaped shape. Here, the fan shape includes not only a geometrically perfect fan shape, but also a shape that resembles or is similar to the fan shape. Accordingly, the shape of the plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged in a circle in the center is a perfect fan shape in FIG. 3, but each part of the fan (or the fan shape) It should be understood that shapes from which other sectors (with smaller radii) have been removed are also included in the sector shape. The top surface area of each of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7) of the first group may be the same.

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 shape or ring shape surrounding the first electrodes of the first group, and the arrangement order is It may correspond to the arrangement order of the first electrodes of the first group. The top surface area of each of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7) of the second group may be the same.

The third group of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) are arranged spaced apart from each other in a ring shape or ring shape surrounding the second group of first electrodes, and the arrangement order is It may correspond to the arrangement order of the first electrodes of the second group. The top surface area of each of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7) of the third group may be the same.

The fourth group of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) are arranged spaced apart from each other in a ring shape or ring shape surrounding the third group of first electrodes, and the arrangement order is It may correspond to the arrangement order of the first electrodes of the third group. The top surface area of each of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7) of the fourth group may be the same.

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

A plurality of 2-1 electrodes (RX1), a plurality of 2-2 electrodes (RX2), and a plurality of 2-3 electrodes are formed between the first electrodes of the second group and the first electrodes of the third group. (RX3) can be deployed. The plurality of 2-1 electrodes (RX1), the plurality of 2-2 electrodes (RX2), and the plurality of 2-3 electrodes (RX3) may be arranged to be spaced apart from each other in a ring shape or ring shape. The arrangement order is that the order of the 2-1 electrode (RX1), the 2-2 electrode (RX2), the 2-3 electrode (RX3), and the 2-4 electrode (RX4) is repeated clockwise or counterclockwise. You can. Here, the number of 2-1 electrodes (RX1) may be 4, the number of 2-2 electrodes (RX2) may be 8, and the number of 2-3 electrodes (RX3) may be 4. The top surface areas of the 2-1st electrode (RX1) and the 2-3 electrode (RX3) may be twice the top surface area of the 2-2 electrode (RX2). Here, the arrangement order may be that the order of the 2-1 electrode (RX1), the 2-2 electrode (RX2), and the 2-3 electrode (RX3) is repeated clockwise or counterclockwise.

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

A plurality of 2-4 electrodes (RX4), a plurality of 2-5 electrodes (RX5), and a plurality of 2-6 electrodes are formed between the first electrodes of the third group and the first electrodes of the fourth group. (RX6) and a plurality of 2-7 electrodes (RX7) may be disposed. The plurality of 2-4 electrodes (RX4), the plurality of 2-5 electrodes (RX5), the plurality of 2-6 electrodes (RX6) and the plurality of 2-7 electrodes (RX7) are ring-shaped or ring-shaped. They may be arranged spaced apart from each other within 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 2nd-6th electrode (RX6). -5 The order of the electrode (RX5) may be repeated clockwise or counterclockwise. Here, the number of 2-4th electrodes (RX4) may be 4, the number of 2-5th electrodes (RX5) may be 8, the number of 2-6th electrodes (RX6) may be 8, The number of 2-7 electrodes (RX7) may be four. The top surface area 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, the arrangement 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 clockwise or counterclockwise. This may be the order.

The 2-4th electrode (RX4) is between two adjacent first electrodes (for example, TX1 and TX2) in the third group and two adjacent first electrodes (for example, TX1 and TX2) in the fourth group. can be placed. The 2-7th electrode (RX7) is between two adjacent first electrodes (for example, TX2 and TX3) in the third group and two adjacent first electrodes (for example, 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 added, and a second electrode may be added between the groups of added 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. 3 will be described in another manner. Let me explain.

FIG. 4 is an auxiliary diagram for explaining the 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. These are concentric circles. Here, the first virtual circle (C1) is defined as the concentric circle closest to the center (O), and the seventh virtual circle (C7) is defined as the concentric circle furthest from the center (O).

Referring to FIGS. 3 and 4, a plurality of electrodes (TX0,..., TX7, RX0,..., RX7) may be arranged in a plurality of concentric circles. More specifically, multiple electrodes (TX0,..., TX7, RX0,..., RX7) are connected to multiple virtual circles (C1, C2, C3, C4, C5, It can be arranged on C6, C7).

Referring to FIGS. 3 and 4, each of the first, third, fifth, and seventh virtual circles (C1, C3, C5, and C7) includes a plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, and TX6). , TX7) can be arranged one by one. Hereinafter, it will be described in detail.

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 fan-shaped shape. Here, the fan shape includes not only a geometrically perfect fan shape, but also a shape that resembles or is similar to the fan 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 fan shape in FIG. 3, but the angles of the fan shape are It should be understood that a shape from which a part (or another fan with a smaller radius than the fan) is removed is also included in the fan shape.

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

The upper surface 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, TX7) are arranged one by one on the third virtual circle (C3).

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

The upper surface 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 positions of the plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged on the third virtual circle (C3) are arranged on the first virtual circle (C1). It may correspond to the arrangement positions of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7). Here, the upper surface of the first electrode (for example, TX0) arranged on the third virtual circle (C3) and the first electrode (for example, TX0) arranged on the first virtual circle (C1) corresponding to each other Comparing the areas, the top surface 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, TX7) arranged on the fifth virtual circle (C5) may be arranged in a ring shape or ring shape. The plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged on the fifth virtual circle (C5) are a ring-shaped or ring-shaped single pattern divided equally into 8 pieces. You can. Or, a plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged on the fifth virtual circle (C5) are each part of a fan (or another fan with a smaller radius than the fan). ) may have been removed.

The upper surface 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 arranged on the third virtual circle (C3). It may correspond to the arrangement positions of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7). Here, the upper surface of the first electrode (for example, TX0) arranged on the fifth virtual circle (C5) and the first electrode (for example, TX0) arranged on the third virtual circle (C3) corresponding to each other Comparing the areas, the top surface 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, 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 be the shape remaining after removing the vertex portion and arc portion of the fan shape. . Alternatively, the plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged on the seventh virtual circle (C7) may be arranged in a ring shape or ring shape. The plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) arranged on the seventh virtual circle (C7) are a ring-shaped or ring-shaped single pattern divided equally into 8 pieces. You can.

The upper surface 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 arranged on the fifth virtual circle (C5). It may correspond to the arrangement positions of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7). Here, the upper surface of the first electrode (for example, TX0) arranged on the seventh virtual circle (C7) and the first electrode (for example, TX0) arranged on the fifth virtual circle (C5) corresponding to each other Comparing the areas, the top surface area of the first electrode (eg, TX0) arranged on the seventh virtual circle C7 may be larger.

Sum of the top surface areas of the 1-0 electrodes (TX0) located on the first, third, fifth, and seventh virtual circles (C1, C3, C5, C7), the first, third, fifth, and seventh virtual circles (C1, C3) , C5, C7), the sum of the upper surface areas of the 1-1 electrodes (TX1) located on the 1st, 3, 5, and 7 virtual circles (C1, C3, C5, C7), and the 1-2 electrode ( Sum of the upper surface areas of the TX2), 1st, 3, 5, 7 Sum of the upper surface areas of the 1-3 electrodes (TX3) located on the virtual circles (C1, C3, C5, C7), 1st, 3, 5 , Sum of the top surface areas of the 1st to 4th electrodes (TX4) located on the 7 virtual circles (C1, C3, C5, C7), on the 1st, 3, 5, and 7 virtual circles (C1, C3, C5, C7) The sum of the top surface areas of the 1-5 electrodes (TX5) located on the 1st, 3rd, 5th, and 7th virtual circles (C1, C3, C5, C7) The sum of the top surface areas of the 1st to 7th electrodes (TX7) located on the first, third, fifth, and seventh virtual circles (C1, C3, C5, C7) may be equal to each other, and the sum of the top surface areas may be, for example, 19.1πmm ² .

Meanwhile, referring again to FIGS. 3 and 4, the plurality of second electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7) are connected to the second, fourth, and sixth virtual circles (C2, C4, It can be arranged on C6). 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 located between the third virtual circle (C3) and the fifth virtual circle. (C5), and the sixth virtual circle (C6) is arranged between the fifth virtual circle (C5) and the seventh virtual circle (C7).

A plurality of 2-0 electrodes (RX0) are arranged on the second virtual circle (C2), a plurality of 2-1 electrodes (RX1) and a plurality of 2-2 electrodes are arranged on the fourth virtual circle (C4). (RX2) and a plurality of 2-3 electrodes (RX3) are arranged on the sixth virtual circle (C6), a plurality of 2-4 electrodes (RX4), a plurality of 2-5 electrodes (RX5), a plurality of The 2-6th electrode (RX6) and a plurality of 2-7th electrodes (RX7) may be arranged.

The plurality of 2-0 electrodes RX0 arranged on the second virtual circle C2 may be two 2-0 electrodes RX0. The two 2-0 electrodes (RX0) may be arranged in a ring shape or ring shape. The two 2-0 electrodes RX0 arranged on the second virtual circle C2 may be a ring-shaped or ring-shaped single pattern divided equally into two pieces. Here, the sum of the top surface areas of the two 2-0 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 ring 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. The pattern may have been divided into 16 parts. Here, the top surface area of one 2-1 electrode (RX1) may be twice that of one 2-2 electrode (RX2). Additionally, the top surface area of one 2-3 electrode (RX3) may be twice that of one 2-2 electrode (RX2).

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

The sum of the top surface areas of the four 2-1 electrodes (RX1), the sum of the top surfaces of the eight 2-2 electrodes (RX2), and the four 2-3 electrodes arranged on the fourth virtual circle (C4) The sum of the upper surface areas of (RX3) may be the same. For example, the sum of the top surfaces of the four 2-1 electrodes (RX1), the sum of the top surfaces of the eight 2-2 electrodes (RX2), and the top surfaces of the four 2-3 electrodes (RX3) The sum may be 19.4πmm ² .

Meanwhile, the arrangement order of the four 2-1 electrodes (RX1), eight 2-2 electrodes (RX2), and four 2-3 electrodes (RX3) arranged on the fourth virtual circle (C4) is: There may be a different collation order.

Referring again to FIG. 3, four 2-4 electrodes (RX4), eight 2-5 electrodes (RX5), and eight 2-6 electrodes (RX6) are arranged on the sixth virtual circle (C6). ) and the four 2nd-7th electrodes (RX7) are arranged in a circular or ring shape. Four 2-4 electrodes (RX4), eight 2-5 electrodes (RX5), eight 2-6 electrodes (RX6) and four 2-7 electrodes arranged on the sixth virtual circle (C6). The electrode RX7 may be a single ring-shaped or ring-shaped pattern divided into 24 patterns. Here, the top surface area of one 2-4th electrode (RX4) may be twice that of one 2-5th electrode (RX5) or one 2-6 electrode (RX6). Additionally, the top surface area of one 2-7 electrode (RX7) may be twice that of one 2-5 electrode (RX5) or one 2-6 electrode (RX6).

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

The sum of the upper surface areas of the four 2-4 electrodes (RX4) arranged on the sixth virtual circle (C6), the sum of the upper surface areas of the eight 2-5 electrodes (RX5), and the eight 2-6 electrodes The sum of the top surface areas of (RX6) and the sum of the top surfaces of the four 2nd-7th electrodes (RX7) may be the same. For example, the sum of the top surface areas of the plurality of 2-4 electrodes (RX4), the sum of the top surface areas of the plurality of 2-5 electrodes (RX5), and the top surface area of the plurality of 2-6 electrodes (RX6) The sum of the top surface areas of the plurality of 2-7 electrodes (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 arranged on the sixth virtual circle (C6) The arrangement order of the -7 electrode (RX7) may be a different arrangement order.

Referring to Figure 3, any one of the first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) on the first virtual circle (C1) (for example, TX0 ) and the 2-0 electrode (RX0) is disposed between the first electrode (TX0) on the third virtual circle (C3) corresponding to one of the first electrodes (TX0).

Between 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 on the third virtual circle C3, Half of the 2-1 electrode (RX1), half of the 2-2 electrode (RX2), and half of the 2-3 electrode (RX3) are disposed. Here, the remaining half of the 2-1 electrode (RX1) is disposed between the other neighboring first electrode (TX7) on the third virtual circle and the other neighboring first electrode (TX7) on the fifth virtual circle (C5). . In addition, the remaining half of the 2-3 electrode (RX3) is between another neighboring first electrode (TX1) on the third virtual circle and another neighboring first electrode (TX1) on the fifth virtual circle (C5). It is placed.

Between the first electrode TX0 on the fifth virtual circle C5 and the first electrode TX0 on the seventh virtual circle C7 corresponding to the first electrode TX0 on the fifth virtual circle C5, Half of the 2-4 electrode (RX4), the 2-5th electrode (RX5), the 2-6th electrode (RX6), and half of the 2-7th electrode (RX7) are disposed. Here, the remaining half of the 2-4th electrode (RX4) is between the other neighboring first electrode (TX7) on the fifth virtual circle (C5) and the other neighboring first electrode (TX7) on the seventh virtual circle (C7). is placed in In addition, the other half of the 2-7th electrode (RX7) is divided into another neighboring first electrode (TX1) on the fifth virtual circle (C5) and another neighboring first electrode (TX1) on the seventh virtual circle (C7). ) is placed between

Meanwhile, referring to the drawing at the bottom 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. mm, the length from the center to the 2-0 electrode (RX0) on the second virtual circle (C2) is 5.1 mm, the length from the center to the first electrode (RX0) on the third virtual circle (C3) is 7.5 mm, the fourth virtual circle The length from the center to the second electrode on the circle C4 is 10.7 mm, the length from the center to the first electrode on the fifth virtual circle C5 is 12.8 mm, and the length from the center to the second electrode on the sixth virtual circle C6 is 12.8 mm. may be 15.5 mm, and the length from the center to the first electrode on the seventh virtual circle C7 may be 17.5 mm. Here, the gap between the first electrode and the second electrode may change depending on actual routing.

As such, the touch sensor 350 according to an embodiment of the present invention shown in FIG. 3 has eight first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) and a plurality of There may also be eight second electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7). Therefore, the total number of channels is 8+8, which can be configured with a total of 16 channels.

Additionally, since the number of reception channels (RX channels) is even (8), there is an advantage in that differential sensing is possible.

In addition, because the top surface area of each channel is uniform, there is an advantage that self capacitance change value (self cap) is generated uniformly when multiple electrodes are driven in self-sensing mode.

In addition, because the top surface area of each channel is uniform, there is an advantage that the mutual capacitance change value (mutual cap, Cm) output from the receiving electrode is generated uniformly when multiple electrodes are driven in mutual sensing mode. It can have a Cm value of approximately 200pF or less.

In addition, in the touch sensor with the conventional orthogonal pattern structure shown in FIG. 2, the SNR of the touch sensing drops when the wheel is touched, making it difficult to recognize touch coordinates. However, the touch sensor shown in FIG. 3 has a plurality of sensors along the shape of the edge. Since the electrodes are arranged, the SNR of touch sensing can be improved, which has the advantage of clearer touch coordinate recognition.

In addition, the touch sensor shown in FIG. 3 has the advantage of being implemented in a full node manner, with first electrodes located on both sides of one second electrode.

Additionally, the total number of traces can be configured to 37 through a predetermined routing method. Descriptions of the routing method and total number of traces will be described later with reference to FIGS. 7 to 10.

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

Compared to the touch sensor 350 according to an embodiment of the present invention shown in FIG. 3, the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 has a 2-0 electrode (2-0) at the center. The only difference is that RX0) was added. Accordingly, except for the description below, the contents are the same as those shown in FIG. 3 or FIG. 4. Hereinafter, the description will focus on parts that are different from FIG. 3.

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

Alternatively, in the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5, a 2-0 electrode (RX0) is additionally disposed in addition to the touch sensor 350 shown in FIG. 3, and the second -0 The electrode RX0 may be placed 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. This will be explained with reference to FIG. 6.

FIG. 6 is a diagram for explaining problems that may occur in the touch sensor 350 shown in FIG. 3. Specifically, FIG. 6 is a diagram illustrating a case where a predetermined test conductive rod (T) is moved over the touch sensor 350 shown in FIG. 3. The left figure shows the test conductive rod (T) being moved over the touch sensor 350. ), and the drawing on the right is a drawing in which the test conductive rod (T) is located at the exact center of the touch sensor 350. Here, the test conductive rod T has a diameter of approximately 5 phi and may be made of a conductive material.

From the left drawing to the right drawing of FIG. 6, the test conductive rod T covers the exact 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. When positioned so as to cause a problem in which the detection signal output from the touch sensor 350 disappears. This may occur when the touch sensor 350 operates in self-sensing mode and senses a detection signal using differential sensing.

Here, the differential sensing uses signals obtained by subtracting the detection signals output from two first electrodes among a plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) to determine whether or not there is a touch. This is a method of sensing. For example, when the touch sensor 350 is driven in self-sensing mode, the touch driving IC (or control unit) of the touch input device outputs two signals output from the 1-0 electrode (TX0) and the 1-1 electrode (TX1). It is possible to determine whether a touch has occurred by receiving a signal obtained by subtracting the detection signals from each other.

As shown in the right drawing 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 on the touch sensor 350, FIG. 3 When the illustrated touch sensor 350 is driven in self-sensing mode, a predetermined detection signal is output from each of the first electrodes of the first group. When the two detection signals output from TX0 and TX1 are subtracted, it is 0, and TX2 Subtracting the two detection signals output from and TX3 is 0, subtracting the two detection signals output from TX4 and TX5 is 0, and subtracting the two detection signals output from TX6 and TX7 is 0, so the actual touch drive The detection signal input to the IC (or control unit) becomes 0. Therefore, 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 is additionally provided with a circular 2-0 electrode (R0) having a predetermined diameter in the center, the touch sensor 550 in FIG. 6 As shown in the left drawing, even if the test conductive rod (T) touches the central part of the touch sensor 550 shown in FIG. 5, the detection signal output from the 2-0 electrode (R0) is strengthened to prevent the touch of the test conductive rod (T). It can be sensed.

Furthermore, the touch sensor 550 shown in FIG. 5 can distinguish between a touch and a water droplet in the center by the 2-0 electrode (RX0) disposed in the center, but the touch sensor 350 shown in FIG. 3 ) cannot distinguish not only touches in the center but also water droplets.

In addition, the touch sensor 550 according to another embodiment of the present invention shown in FIG. 5 has eight first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7) and a plurality of first electrodes (TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7). There can also be eight 2-electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7). Therefore, the total number of channels is 8+8, which can be configured with a total of 16 channels.

Additionally, since the number of reception channels (RX channels) is even (8), there is an advantage in that differential sensing is possible.

In addition, because the top surface area of each channel is uniform, there is an advantage that self capacitance change value (self cap) is generated uniformly when multiple electrodes are driven in self-sensing mode.

In addition, because the top surface area of each channel is uniform, there is an advantage that the mutual capacitance change value (mutual cap, Cm) output from the receiving electrode is generated uniformly when multiple electrodes are driven in mutual sensing mode. Here, for example, it may have a Cm value of approximately 200pF or less.

In addition, in the touch sensor with the conventional orthogonal pattern structure shown in FIG. 2, the SNR of the touch sensing decreases when the wheel is touched, making it difficult to recognize touch coordinates. However, the touch sensor shown in FIG. 5 has a plurality of sensors along the shape of the edge. Since the electrodes are arranged, the SNR of touch sensing can be improved, which has the advantage of clearer touch coordinate recognition.

In addition, the touch sensor shown in FIG. 5 is a full node with first electrodes located on both sides of one second electrode, excluding the 2-0 electrode (RX0) located in the center. It is implemented in a way. Therefore, the touch sensor shown in FIG. 5 is almost a full node type.

Additionally, the total number of traces can be configured to 37 through a predetermined routing method. Descriptions of the routing method and total number of traces will be described later with reference to FIGS. 7 to 10.

Meanwhile, referring to the drawing at the bottom 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 centrally located 2-0 electrode (RX0) is 0.1. mm, 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 virtual circle (C2) is 4.9 mm, and the length from the center to the first electrode (RX0) on the second virtual circle (C2) is 2.5 mm. The length from the first electrode on the 3 virtual circle (C3) is 7.5 mm, the length from the second electrode on the fourth virtual circle (C4) is 10.7 mm, and the length from the center to the first electrode on the fifth virtual circle (C5) may be 12.8 mm, the length from the center to the second electrode on the sixth virtual circle C6 may be 15.5 mm, and the length from the center to the first electrode on the seventh virtual circle C7 may be 17.5 mm. Here, the gap between the first electrode and the second electrode may change depending on actual routing.

FIGS. 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.

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

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

Specifically, the 1-0 electrodes (TX0) located on the 1st, 3, 5, and 7th virtual circles (C1, C3, C5, and C7) are electrically connected to trace ⒜, and the 1st, 3, 5, and 7 The 1-7th electrodes (TX7) located on the virtual circles (C1, C3, C5, C7) are electrically connected to trace ⒣. For reference, in FIG. 7, for convenience of explanation, traces ⒜ and 1 connected to the 1-0 electrodes (TX0) located on the 1st, 3rd, 5th, and 7th virtual circles (C1, C3, C5, and C7) , 3, 5, 7 Trace ⒣ connected to the 1st to 7th electrodes (TX7) located on the virtual circles (C1, C3, C5, C7) is indicated with a single thick line.

Trace ⒜ passes between the 1-0 electrode (TX0) and the 1-7 electrode (TX7) on the 7th virtual circle (C7) and is connected to the 1-0 electrode (TX0), and is connected to the 6th virtual circle (C6) ), passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5), and passes between the 1-0th electrode (TX0) and the 1-7th electrode (TX7) on the 5th virtual circle (C5) 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). Passing between the 1-0 electrode (TX0) and the 1-7 electrode (TX7) on the top, it is connected to the 1-0 electrode (TX0), and the two 2-0 electrodes on the second virtual circle (C2) RX0) and is connected to the 1-0 electrode (TX0) on the first virtual circle (C1).

Trace ⒣ is connected to the 1-7 electrode (TX7) while passing between the 1-0 electrode (TX0) and the 1-7 electrode (TX7) on the 7th virtual circle (C7), and is connected to the 6th virtual circle (C6). ), passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5), and passes between the 1-0th electrode (TX0) and the 1-7th electrode (TX7) on the 5th 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). Passing between the 1-0 electrode (TX0) and the 1-7 electrode (TX7) on the top, it is connected to the 1-7 electrode (TX7), and the two 2-0 electrodes on the second virtual circle (C2) RX0) and is connected to the 1-7th electrode (TX7) on the first virtual circle (C1).

The 1-1 electrodes (TX1) located on the first, third, fifth, and seventh virtual circles (C1, C3, C5, C7) are electrically connected to trace ⒝. Specifically, 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 7th virtual circle (C7), and the 6th virtual circle (C7). Passes between the 2-4 electrode (RX4) and the 2-5 electrode (RX5) on the circle (C6), and the 1-0 electrode (TX0) and the 1-1 electrode (TX1) on the fifth virtual circle (C5) ) is connected to the 1-1 electrode (TX1), passes between the 2-1 electrode (RX1) and the 2-2 electrode (RX2) on the fourth virtual circle (C4), and passes between the third virtual circle (C4). It is connected to the 1-1 electrode (TX1) while passing between the 1-0 electrode (TX0) and the 1-1 electrode (TX1) on (C3), and the two 2- 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 located on the 1st, 3rd, 5th, and 7th virtual circles C1, C3, C5, and C7 are electrically connected to trace ⒠. Specifically, trace ⒠ is connected to the 1-6th electrode (TX6) while passing between the 1-7th electrode (TX7) and the 1-6th electrode (TX6) on the 7th virtual circle (C7), and the 6th virtual circle (C7). Passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5) on the circle (C6), and the 1-7th electrode (TX7) and the 1-6th electrode (TX6) on the fifth virtual circle (C5) ), passes between the 1-6 electrode (TX6), passes between the 2-1 electrode (RX1) and the 2-2 electrode (RX2) on the fourth virtual circle (C4), and passes between the third virtual circle (C4). It is connected to the 1-6 electrode (TX6) while passing between the 1-7 electrode (TX7) and the 1-6 electrode (TX6) on (C3), and the two second- It passes between the 0 electrodes (RX0) and is connected to the 1-6th electrodes (TX6) on the first virtual circle (C1).

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

Specifically, the 1-3 electrodes (TX3) located on the 1st, 3, 5, and 7th virtual circles (C1, C3, C5, and C7) are electrically connected to trace ⒟, and the 1st, 3, 5, and 7 The first to fourth electrodes (TX4) located on the virtual circles (C1, C3, C5, C7) are electrically connected to trace ⒠. For reference, in FIG. 8, for convenience of explanation, traces ⒟ and 1 connected to the 1-3 electrodes (TX3) located on the 1st, 3rd, 5th, and 7th virtual circles (C1, C3, C5, C7) , 3, 5, 7 Trace ⒠ connected to the 1st to 4th electrodes (TX4) located on the virtual circles (C1, C3, C5, C7) is indicated with a single thick line.

Trace ⒟ is connected to the 1-3 electrode (TX0) while passing between the 1-3 electrode (TX3) and the 1-4 electrode (TX4) on the 7th virtual circle (C7), and is connected to the 6th virtual circle (C6) ) passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5) on the 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 is connected to the 1-3 electrode (TX3) while passing between the 1-3 electrode (TX3) and the 1-4 electrode (TX4) on the second virtual circle (C2), and the two 2-0 electrodes ( RX0) and is connected to the 1-3 electrodes TX3 on the first virtual circle C1.

Trace ⒠ is connected to the 1-4 electrode (TX4) while passing between the 1-3 electrode (TX3) and the 1-4 electrode (TX4) on the 7th virtual circle (C7), and is connected to the 6th virtual circle (C6) ) passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5) on the As it passes, it is connected to the 1-4 electrode (TX4), 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 is connected to the 1-4 electrode (TX4) while passing between the 1-3 electrode (TX3) and the 1-4 electrode (TX4) on the second virtual circle (C2), and the two 2-0 electrodes ( RX0) and is connected to the 1st-4th electrodes TX4 on the first virtual circle C1.

The 1-2 electrodes (TX2) located on the first, third, fifth, and seventh virtual circles (C1, C3, C5, C7) are electrically connected to trace ⒞. Specifically, trace ⒞ is connected to the 1-2 electrode (TX2) while passing between the 1-2 electrode (TX2) and the 1-3 electrode (TX3) on the 7th virtual circle (C7), and the 6th virtual circle (C7). Passes between the 2-4th electrode (RX4) and the 2-5th electrode (RX5) on the circle (C6), and the 1-2th electrode (TX2) and the 1-3th electrode (TX3) on the 5th virtual circle (C5) ) is connected to the 1-2 electrode (TX2), passes between the 2-1 electrode (RX1) and the 2-2 electrode (RX2) on the fourth virtual circle (C4), and passes between the third virtual circle (C4). It is connected to the 1-2 electrode (TX2) while passing between the 1-2 electrode (TX2) and the 1-3 electrode (TX3) on (C3), and the two second- It passes between the 0 electrodes (RX0) and is connected to the 1-2 electrode (TX2) on the first virtual circle (C1).

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

FIGS. 9 and 10 are diagrams for explaining the routing and trace connection structure of the plurality of second electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7) shown in FIG. 5. Figure 9 is a diagram 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 Figure 10 is a diagram for explaining the fourth virtual circle (C1,..., C7). Routing structure of the 2-1st electrode (RX1), 2-2nd electrode (RX2), and 2-3rd electrode (RX3) on the circle (C4) and the 2-4th electrode (RX4) on the 6th virtual circle (C6) ), this is a diagram to explain the routing structure of the 2-5th electrode (RX5), the 2-6th electrode (RX6), and the 2-7th electrode (RX7). Here, the matters shown in FIGS. 9 and 10 may also be applied to the touch sensor 350 according to an embodiment of the present invention shown in FIG. 3.

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

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

Trace ⓒ is connected to any one 2-2 electrode (RX2) of the four 2-2 electrodes (RX2) connected in series on the fourth virtual circle (C4).

Trace ⓓ is connected to one of the two 2-3 electrodes RX3 connected in series on the fourth virtual circle C4.

Referring to Figure 9, three traces ⓑⓒⓓ are arranged together up to the fourth virtual circle (C4). Specifically, the three traces ⓑⓒⓓ pass between the 1-6th electrode (TX6) and the 1-7th electrode (TX7) on the 7th virtual circle (C7), and the 2-7th electrode (TX7) on the 6th virtual circle (C6). Passing between the 4th electrode (RX4) and the 2-5th electrode (RX5), passing between the 1-6th electrode (TX6) and the 1-7th electrode (TX7) on the 5th virtual circle (C5), the fourth virtual circle It is connected to one of the 2-1 electrodes (RX1), the one of the 2-2 electrodes (RX2), and the one of the 2-3 electrodes (RX3) on (C4).

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

Trace ⓕ is connected to any one 2-5 electrode (RX5) of the four 2-5 electrodes (RX5) connected in series on the sixth virtual circle (C6).

Trace ⓖ is connected to any one 2-6 electrode (RX6) of the four 2-6 electrodes (RX6) connected in series on the sixth virtual circle (C6).

And, trace ⓗ is connected in parallel with the two 2-7th electrodes (RX7) on the sixth virtual circle (C6).

Referring to Figure 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 the 1-5 electrodes (TX5) on the 7th virtual circle (C7) and connect to any one of the above on the 6th virtual circle (C6). They are respectively connected to the 2-4th electrode (RX4), the one of the 2-5th electrodes (RX5), and the one of the 2-6th electrodes (RX6). And, trace ⓗ passes between the 1-5 electrode (TX5) and the 1-6 electrode (TX6) on the 7th virtual circle (C7) and connects the two 2-7 electrodes (RX7) on the 6th virtual circle (C6). ) are connected in parallel.

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

FIG. 11 is a diagram 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 as shown in FIGS. 7 to 10, 20 traces can be placed on one side of the touch sensors 350 and 550, and 20 traces can be placed on one side of the touch sensors 350 and 550. 17 traces can be placed on one side.

Specifically, the 20 traces disposed on one side of the touch sensors 350 and 550 include two traces for ESD on each side, four traces for TX0, TX1, TX6, and TX7, and traces for RX0 to RX7. It can be composed of 8, 6 guard traces (GUARD) to prevent electrical contact between TX and RX.

The 17 traces arranged on the other side of the touch sensor (350, 550) include 2 traces for ESD on each side, 4 traces for TX2, TX3, TX4, and TX5, and 7 traces for RX1 to RX7. , It can be composed of four guard traces (GUARD) to prevent electrical contact between TX and RX.

In this way, the touch sensors 350 and 550 shown in FIG. 3 or 5 may be composed of a total of 37 traces, and among these traces, 23 active traces may be composed. Here, active traces refer to the number of traces connected to TXs and RXs excluding 10 guard traces and 4 ESD traces from the total number of traces.

Figure 12 is a diagram showing another example of Figure 9, and Figures 13 (a) and (b) are diagrams for explaining the routing and number of traces of the touch sensor shown in Figure 12.

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

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

Trace ⓕ is connected to any one 2-5 electrode (RX5) of the four 2-5 electrodes (RX5) connected in series on the sixth virtual circle (C6).

Trace ⓖ is connected to any one 2-6 electrode (RX6) of the four 2-6 electrodes (RX6) connected in series on the sixth virtual circle (C6).

And, trace ⓗ is connected in parallel with the two 2-7th 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 1-5 electrodes (TX5) and the 1-6 electrodes (TX6) on the 7th virtual circle (C7) and connect to any one of the above on the 6th virtual circle (C6). is connected to the 2-4th electrode (RX4), one of the 2-5th electrodes (RX5), one of the 2-6th electrodes (RX6), and the two 2-7th electrodes (RX7) .

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

Referring to (b) of FIG. 13, 21 traces may be placed on one side of the touch sensor shown in FIG. 12, and 18 traces may be placed on the other side of the touch sensor.

Specifically, the 21 traces arranged on one side of the touch sensor shown in FIG. 12 include two traces for ESD on each side, four traces for TX0, TX1, TX6, and TX7, and traces for RX0 to RX7. It can consist of 8 guard traces (GUARD) to prevent electrical contact between TX and RX.

The 18 traces placed on the other side of the touch sensor shown in FIG. 12 include 2 traces for ESD on each side, 4 traces for TX2, TX3, TX4, and TX5, and 7 traces for RX1 to RX7. , It can be composed of five guard traces (GUARD) to prevent electrical contact between TX and RX.

In this way, the touch sensor shown in FIG. 12 can be composed of a total of 39 traces, and among these traces, 23 active traces can be composed. Here, active traces refer to the number of traces connected to TXs and RXs excluding 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.

Compared to 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, and RX7, The difference is 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 has the same technical effects as the touch sensor 350 shown in FIG. 3, and can be configured in the same way as the number of routing or traces.

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

Compared to 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, and RX7, The difference is 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 has the same technical effects as the touch sensor 550 shown in FIG. 5, and can be configured in the same way as the number of routing or traces.

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. That's one vote.

Touch sensor in Figure 2 Touch sensor in Figure 3 Touch sensor in Figure 5 Diameter [mm] 35 35 35 Channel TX 8 8 8 RX 8 8 8 Trace Quantity (including ESD, GUARD) 26 37 37 Is the trace coupling regular so it can be removed from SW? N/A Need verification
Need verification
Pattern No odd channels? O O O In differential sensing mode, does the center coordinate disappear? O X O Self orthogonality possible? (No multiplication required) O X X Is Cm uniform? X O O Uniform shape? Is the self cap the same for each sensor? 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 Can you distinguish between 5 pie touches and water droplets in the center area? O X O

FIGS. 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.

Referring to FIGS. 16, 17A, and 17B, the number of traces of the touch sensor 550 in FIG. 5 may be 43. Although the number of traces of the touch sensor 550 in FIG. 5 is slightly greater than that of the touch sensors in FIGS. 3, 5, and 12, the overall number of traces passing between electrodes (or patterns) is It can be reduced, and when considering the performance of the touch sensor, there is an advantage in that the amount of change in capacitance (delta Cm) is formed to be larger. In addition, there is an advantage in that trace management is easy because the bundle of traces (A, B) can be reduced to two.

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

The trace connected to one 2-1 electrode (RX1), the trace connected to one 2-2 electrode (RX2), and the trace connected to one 2-3 electrode (RX3) in the first group are the fifth Between the 1-6th electrode (TX6) and the 1-7th electrode (TX7) on the virtual circle (C5), the 2-5th electrode (RX5) and the 2-6th electrode (RX6) on the 6th virtual circle (C6) It passes between the 1-6th electrode TX6 and the 1-7th electrode TX7 on the 7th virtual circle C7 and is included in the trace bundle A.

The trace connected to one 2-1 electrode (RX1), the trace connected to one 2-2 electrode (RX2), and the trace connected to one 2-3 electrode (RX3) in the second group are the fifth Between the 1-3 electrode (TX3) and the 1-2 electrode (TX2) on the virtual circle (C5), the 2-5 electrode (RX5) and the 2-6 electrode (RX6) on the sixth virtual circle (C6) It passes between the 1-3 electrode TX3 and the 1-2 electrode TX2 on the 7th virtual circle C7 and is included in the trace bundle B.

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

A trace connected to 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 trace connected to one 2-4 electrode (RX4) in the first group. The trace connected to the 2-7 electrode (RX7) passes between the 1-5 electrode (TX5) and the 1-6 electrode (TX6) on the 7th virtual circle (C7) and is included in the trace bundle (B).

A trace connected to 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 trace connected to one 2-4 electrode (RX4) in the second group. The trace connected to the 2-7 electrode (RX7) passes between the 1-2 electrode (TX2) and the 1-1 electrode (TX1) on the 7th 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 is the 1-6 electrode (TX6) and the 1-7 electrode (TX7) on the 7th virtual circle (C7). One electrode included in the trace bundle (A) and located at one end of the 2-5 electrodes (RX5) in the second group is the 1-2 electrode (TX2) on the seventh virtual circle (C7). ) and the first to third electrodes (TX3) and are included in the trace bundle (B).

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

The trace connected to one 2-0 electrode (RX0) of the two 2-0 electrodes (RX0) on the second virtual circle (C2) is on the third, fifth, and seventh virtual circles (C3, C5, 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 of the first group on the fourth virtual circle (C4), and the 2-1 electrode (RX1) and the 2-2 electrode ( RX2), and passes between the 2-5th electrode (RX5) and the 2-6th electrode (RX6) in the first group on the sixth virtual circle (C6).

FIG. 18A is a diagram 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 has second electrodes (RX0, RX1, RX2, RX3, RX4, RX5) compared to the touch sensor 550 shown in FIG. 5. ) has fewer channels. Specifically, the number of channels of the second electrodes (RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7) of the touch sensor 550 shown in FIG. 5 is 8, while the number of channels shown in FIG. 18A is 8. The number of channels of the second electrodes (RX0, RX1, RX2, RX3, RX4, and RX5) of the sensor 1850 is 6.

Since the touch sensor 550 shown in FIG. 5 has more channels of the second electrode than the touch sensor 1850 in FIG. 18A, the area per channel is smaller. Therefore, the mutual capacitance change (Cm) between any adjacent first electrode and any second electrode of the touch sensor 550 in FIG. 5 is similar to that of any adjacent first electrode of the touch sensor 1850 in FIG. 8. is smaller than the mutual capacitance value (Cm) and the mutual capacitance change value (ΔCm) between the second electrodes, and a decrease in signal-to-noise ratio (SNR) is expected. On the other hand, because the touch sensor 1850 of FIG. 18A has reduced 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 change value (ΔCm) between any adjacent first electrode and any second electrode can be increased. Furthermore, it is expected that the signal-to-noise ratio (SNR) can also be increased.

Additionally, because the number of second electrodes in the touch sensor 1850 of FIG. 18A is reduced more than the number of second electrodes of the touch sensor 550 in FIG. 5, the number of traces can 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 number of traces in the touch sensor 1850 in FIG. 18A is 39. You can further reduce traces. Specifically, this will be described later with reference to FIGS. 18B and 18C.

Compared to the touch sensor 550 shown in FIG. 5, the touch sensor 1850 shown in FIG. 18A has a top surface area of the 2-1 electrode (RX1) and a top surface area of the 2-2 electrode (RX2). may be substantially the same. In addition, when the touch sensor 1850 shown in FIG. 18A is explained by introducing the virtual circles of FIG. 4, the top surface area of the second electrodes RX1 and RX2 located on the fourth virtual circle C4 is substantially They may be the same, and the second electrodes RX1 and RX2 located on the fourth virtual circle C4 may be arranged alternately.

When explaining by introducing the virtual circles of FIG. 4, any one of the first electrodes TX0 to TX7 located on the third virtual circle C3 (TX0) and the fifth virtual circle (C5) A portion of the 2-1 electrode RX1 and a portion of the 2-2 electrode RX2 may be disposed between any one of the first electrodes TX0 to TX7.

In addition, compared to the touch sensor 550 shown in FIG. 5, the touch sensor 1850 shown in FIG. 18A has a top surface area of the 2-3 electrode RX3 and a top surface of the 2-5 electrode RX5. The area may be substantially the same. The top surface area of the 2-4th electrode (RX4) may be half of the top surface area of the 2-3rd electrode (RX3) and the top surface area of the 2-5th electrode (RX5). Additionally, the touch sensor shown in FIG. 18A ( 1850), when explaining by introducing the virtual circles of FIG. 4, the second electrodes (RX3, RX4, RX5) located on the sixth virtual circle (C6) are arranged to repeat in the order of RX3-RX4-RX5-RX4 It can be.

When explaining by introducing the virtual circles of FIG. 4, one of the first electrodes (TX0 to TX7) located on the fifth virtual circle (C5) (TX0) and the seventh virtual circle (C7) Between the first electrode TX0 of any one of the first electrodes TX0 to TX7, a portion of the 2-3 electrode RX3, the entire 2-4 electrode RX4, and the 2-5 electrode Part of (RX5) may be deployed.

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

When explaining by introducing the virtual circle of FIG. 4, the 2-1 electrodes (RX1) and the 2-2 electrodes (RX2) disposed on the fourth virtual circle (C4) are divided into two groups (first group and divided into group 2). Each group includes RX1-RX2-RX1-RX2 arranged sequentially clockwise on the fourth virtual circle C4. The 2-1 electrodes (RX1) of each group are connected in series, and the 2-2 electrodes (RX2) are also connected in series.

The trace connected to one 2-1 electrode (RX1) in the first group and the trace connected to one 2-2 electrode (RX2) are the 1-6 electrode on the fifth virtual circle C5. (TX6) and the 1-7th electrode (TX7), between the 2-5th electrode (RX5) and the 2-4th electrode (RX4) on the 6th virtual circle (C6), and on the 7th virtual circle (C7) It passes between the 1-6 electrode (TX6) and the 1-7 electrode (TX7) and is included in the trace bundle (A).

The trace connected to one 2-1 electrode (RX1) in the second group and the trace connected to one 2-2 electrode (RX2) are the 1-3 electrode (TX3) on the fifth virtual circle (C5) and the 1-2 electrode (TX2), between the 2-5 electrode (RX5) and the 2-4 electrode (RX4) on the 6th virtual circle (C6), and the 1-3 on the 7th virtual 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 electrodes (RX3), the 2-4 electrodes (RX4), and the 2-5 electrodes (RX5) disposed on the sixth virtual circle (C6) are divided into two groups (the first group and the first group). Divide into 2 groups). Each group includes RX3-RX4-RX5-RX4-RX3-RX4-RX5-RX4 arranged sequentially clockwise on the sixth virtual circle C6. The 2-3 electrodes (RX3) of each group are connected in series, the remaining electrodes except one electrode located at one end among the 2-4 electrodes (RX4) are also connected in series, and the 2-5 electrodes (RX5) are connected in series. ) are also connected in series.

The trace connected to one 2-3 electrode (RX3), the trace connected to one 2-4 electrode (RX4), and the trace connected to one 2-5 electrode (RX5) in the first group are the 7th electrode. It passes between the 1-5th electrode (TX5) and the 1-6th electrode (TX6) on the virtual circle (C7) and is included in the trace bundle (B).

The trace connected to one 2-3 electrode (RX3), the trace connected to one 2-4 electrode (RX4), and the trace connected to one 2-5 electrode (RX5) in the second group are the seventh It passes between the 1-2 electrode TX2 and the 1-1 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 is the 1-6 electrode (TX6) and the 1-7 electrode (TX7) on the 7th virtual circle (C7). One electrode included in the trace bundle A 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 first to third electrodes (TX3) and are included in the trace bundle (B).

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

The trace connected to one 2-0 electrode (RX0) of the two 2-0 electrodes (RX0) on the second virtual circle (C2) is on the third, fifth, and seventh virtual circles (C3, C5, 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 of the first group on the fourth virtual circle (C4), and the 2-1 electrode (RX1) and the 2-2 electrode ( RX2), and passes between the 2-5th electrode (RX5) and the 2-4th 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 be configured with a total of 39 traces.

FIG. 19 is a diagram 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 has the first electrodes TX0,..., TX7 and the 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 at the outside of the touch sensor 1850 in FIG. 18A.

When explaining by introducing the virtual circles of FIG. 4, the touch sensor 1950 shown in FIG. 19 has a third virtual circle C3 and a fifth virtual circle (C3) compared to the touch sensor 1850 shown in FIG. 18A. The width of the first electrodes (TX0,..., TX7) located on C5) is longer, while the second electrodes (RX1,...) located on the fourth virtual circle (C4) and the sixth virtual circle (C6) are longer. , RX5) is narrower, and the widths of the first electrodes (TX0,..., TX7) located on the seventh virtual circle are narrower.

Specifically, compared to the touch sensor 1850 shown in FIG. 18A, the touch sensor 1950 shown in FIG. 19 has a first electrode located on the third virtual circle C3 and the fifth virtual circle C5. The width of the electrodes (TX0,..., TX7) is 0.2 mm longer, while the width of the second electrodes (RX1,..., RX5) located on the fourth virtual circle (C4) and the sixth virtual circle (C6) is 0.2 mm longer. It is 0.1 mm narrower, and the width of the first electrodes (TX0,..., TX7) located on the seventh virtual circle is 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.

When 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 increased the top surface area of the second electrodes (RX0,...,RX5) by reducing the number of RX channels. Accordingly, the touch sensor 1850 shown in FIG. 18A can 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, similar characteristics to the touch sensor 1850 of FIG. 18A can 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, touch sensor_1 in FIG. 5 is due to the routing and trace connection in FIG. 11 or 13, and touch sensor_2 in FIG. 5 is due to the routing and trace connection in FIG. 16 and FIG. 17.

Touch sensor in Figure 2 Touch sensor _1 in Figure 5 Touch sensor_2 in Figure 5 Touch sensor of Figure 18a Touch sensor in Figure 19 Diameter [mm] 35 35 35 35 35 Channel TX 8 8 8 8 8 RX 8 8 8 6 6 Trace Quantity (including ESD, GUARD) 26 37 43 39 39 Is the trace coupling regular so it can be removed from SW? N/A Need verification
Need verification
Need verification Need verification Max trace number between TX-RX N/A 9(540um) 6(380um) 5(320um) 5(320um) Max Trace number between RX-RX N/A 14 7 7 7 Max trace number between TX-TX N/A 6 7 6 6 Pattern No odd channels? O O O O O In differential sensing mode, does the center coordinate disappear? O X X X X Self orthogonality possible? (No multiplication required) O X X X X Is Cm uniform? X O O O O Uniform shape? Is the self cap the same for each sensor? 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 △ △ △ △ Is it possible to distinguish 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

Figure 20 shows simulation environments for obtaining the simulation results listed in Table 2, reflecting 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 results of the simulation shown in Table 2. This is a simulation showing the base mutual capacitance value (Cm) in an untouched state. The solid line is a point showing the optimal change in mutual capacitance, and the dotted line is a point showing the worst change in mutual capacitance.

In Figure 21, candidate groups for each max diff node and min diff node are selected and simulated, and as shown in Table 2, max delta Cm and min delta Cm can be summarized, and the self-capacitance value (Cs) for each sensor ) were able to compare the simulation values.

Figures 22 (a) to (c) show actual simulation output data in the state of Figure 21. Specifically, (a) of FIG. 22 is simulation output data of touch sensor_2 (550) shown in FIG. 5, and (b) of FIG. 22 is simulation output data of touch sensor 1850 shown in FIG. 18A. , (c) in FIG. 22 is simulation output data of the touch sensor 1950 shown in FIG. 19.

Referring to the table in (a) of FIG. 22, it was confirmed that the average Cm (Average Cm) was approximately 211 (fF). Meanwhile, referring to the table in (b) of Figure 22, it was confirmed that the average Cm (Average Cm) was approximately 285 (fF), which was approximately 35% increased than the average Cm in (a) of Figure 22. Referring to the table in (c) of Figure 22, it was confirmed that the average Cm (Average Cm) was approximately 295 (fF), which was approximately 39.8% increased than the average Cm in (a) of Figure 22.

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

In (a) of Figure 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 (Min delta Cm) was 38.5 ( fF), and Min Delta Cm/C was confirmed to be 18.2%.

In (b) of Figure 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 (Min delta Cm) was 49.2 ( fF), and Min Delta Cm/C was confirmed to be 17.3%. Based on these results, the Max delta Cm of the touch sensor 1850 of FIG. 18A is increased by approximately 53%, and the Min delta Cm is increased by approximately 27% compared to the touch sensor_2 (550) of FIG. 5. You can check it.

In (c) of Figure 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 (Min delta Cm) was 48.5 ( fF), and Min Delta Cm/C was confirmed to be 16.4%. Based on these results, the Max delta Cm of the touch sensor 1950 in FIG. 19 is increased by approximately 63%, and the Min delta Cm is increased by approximately 25% compared to the touch sensor_2 (550) in FIG. 5. You can check it.

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

Referring to (a) to (c) of Figure 24, overall, uniform Cs in the first electrodes (TX0,..., TX7) and the second electrodes (RX0,..., RX7, or RX0,..., RX5) I was able to confirm that the value was being output.

FIG. 25 shows the touch sensor_2 (550) shown in FIG. 5 in order to obtain the results of simulation 1 (Sim.1), simulation 2 (Sim.2), and simulation 3 (Sim.3) shown in Table 2. Three simulations (Sim.1, Sim.2, Sim.3) were performed with a 5 phi conductive rod for each of the touch sensor 1850 shown in 18a and the touch sensor 1950 shown in FIG. 19. It's a look.

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

The result values of Simulation 1 (Sim.1), Simulation 2 (Sim.2), and Simulation 3 (Sim.3) listed in Table 2 are compared by calculating the max/rms value of accuracy at each simulation point. It was done.

FIG. 26 shows the straight line touch shown on the left side of FIG. 25 being performed on each of touch sensor_2 (550) shown in FIG. 5, touch sensor 1850 shown in FIG. 18A, and touch sensor 1950 shown in FIG. 19. It is a diagram simulating the maximum error and RMS error in one case, and Figure 27 shows the maximum error and RMS error for each position (1, 2, 3, 4). It's a graph. In FIG. 26, (a) represents the touch sensor_2 (550) shown in FIG. 5, (b) represents the touch sensor 1850 shown in FIG. 18A, and (c) represents the touch sensor shown in FIG. 19 ( 1950).

As shown in FIGS. 26 and 27, by adjusting the width of the electrodes of the touch sensor 1950 shown in FIG. 19, the maximum error and RMS error can be adjusted to the touch of FIGS. 5 and 18A. It was confirmed that it could be reduced further than the sensors (550, 1850).

FIG. 28 shows the theta line touch in the middle diagram of FIG. 25 being performed on each of touch sensor_2 (550) shown in FIG. 5, touch sensor 1850 shown in FIG. 18A, and touch sensor 1950 shown in FIG. 19. This is a diagram simulating the maximum error and RMS error in one case, and Figure 29 is a graph of the maximum error and RMS error for each angle (1, 2, 3). . In FIG. 28, (a) represents the touch sensor_2 (550) shown in FIG. 5, (b) represents the touch sensor 1850 shown in FIG. 18A, and (c) represents the touch sensor shown in FIG. 19 ( 1950).

As shown in FIGS. 28 and 29, by adjusting the width of the electrodes of the touch sensor 1950 shown in FIG. 19, the maximum error and RMS error are adjusted to touch sensor_2 of FIG. 5. It was confirmed that it could be further reduced than the touch sensor 550 and 1850 of FIG. 18A.

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

As shown in FIGS. 30 and 31, by adjusting the width of the electrodes of the touch sensor 1950 shown in FIG. 19, the maximum error and RMS error are adjusted to touch sensor_2 of FIG. 5. It was confirmed that it could be further reduced than the touch sensor 550 and 1850 of FIG. 18A.

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

Referring to FIG. 32, compared to the touch sensor 350 shown in FIG. 3, the touch sensor 3250 according to another embodiment of the present invention has second electrodes excluding the 2-0 electrode (RX0) ( There are differences in configuration among RX1, RX2, RX3, RX4, RX5, RX6, and RX7).

Specifically, when explaining by introducing the virtual circles shown in FIG. 7, the touch sensor 3250 of FIG. 32 includes the 2-1 electrodes RX1 and the 2-2 electrodes disposed on the fourth virtual circle C4. It includes electrodes RX2 and second-third electrodes RX3, and is arranged to repeat the order of RX1-RX2-RX3. And, one of the first electrodes (TX0 to TX7) on the third virtual line (C3) and one of the first electrodes (TX0 to TX7) on the fifth virtual line (C5) One 2-1 electrode (RX1), one 2-2 electrode (RX2), and one 2-3 electrode (RX3) are disposed between (TX0). Here, one 2-1 electrode (RX1), one 2-2 electrode (RX2), and one 2-3 electrode (RX3) may have substantially the same top surface area.

The touch sensor 3250 of FIG. 32 includes 2-4 electrodes RX4, 2-5 electrodes RX5, 2-6 electrodes RX6, and It includes 2nd to 7th electrodes (RX7), which are arranged to repeat the order of RX4-RX5-RX6-RX7. And, one electrode (TX0) of the first electrodes (TX0 to TX7) on the fifth virtual line (C5) and one electrode (TX0 to TX7) of the first electrodes (TX0 to TX7) on the seventh virtual 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 can have a top surface area.

FIG. 33 is a diagram showing the 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 electrodes (RX1) disposed on the fourth virtual circle (C4) are connected in parallel to each other through traces, and the 2-3 electrodes (RX3) are connected in parallel to each other through traces. ) are also connected in parallel to each other through traces. Meanwhile, the 2-2 electrodes RX2 are connected in series through traces.

The 2-1 electrodes (RX1) are connected in parallel through a trace connected to one side of each 2-1 electrode (RX1), and the 2-3 electrodes (RX3) are connected to each of the 2-3 electrodes (RX3). They are connected in parallel through a trace connected to the other side of them. And, the 2-2 electrodes (RX2) are connected in series with each other, and the trace connecting the two 2-2 electrodes (RX2) that are close to each other is connected to the two 2-2 electrodes (RX2) that are close to each other. It passes between the 2-3 electrode (RX3) and the 2-1 electrode (RX1) disposed in between.

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

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

Meanwhile, as another embodiment of the present invention, the touch sensor 550 shown in FIG. 5 includes second electrodes (RX1, RX2, RX3, RX4, An array structure and routing structure (RX5, RX6, RX7) can be introduced.

Figure 34 is a diagram 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 structural difference in that the number of channels of the second electrodes is reduced compared to the touch sensor 3250 shown in FIG. 2.

Specifically, the touch sensor 3250 of FIG. 32 has second electrodes (RX0 to RX7) forming 8 channels, while the touch sensor 3450 of FIG. 34 has second electrodes (RX0 to RX5) forming 6 channels. constitutes.

When explaining by introducing the virtual circles shown in FIG. 7, the touch sensor 3450 of FIG. 34 includes the 2-1 electrodes (RX1) and the 2-2 electrodes (RX2) disposed on the fourth virtual circle (C4). ), which are arranged so that the order of RX1-RX2 is repeated. And, one of the first electrodes (TX0 to TX7) on the third virtual line (C3) and one of the first electrodes (TX0 to TX7) on the fifth virtual line (C5) One 2-1 electrode (RX1) and one 2-2 electrode (RX2) are disposed between (TX0). Here, one 2-1 electrode (RX1) and one 2-2 electrode (RX2) may have substantially the same top surface area.

The touch sensor 3450 of FIG. 34 includes 2-3 electrodes RX3, 2-4 electrodes RX4, and 2-5 electrodes RX5 disposed on the sixth virtual circle C6. However, the order of RX3-RX4-RX5 is arranged to repeat. And, one electrode (TX0) of the first electrodes (TX0 to TX7) on the fifth virtual line (C5) and one electrode (TX0 to TX7) of the first electrodes (TX0 to TX7) on the seventh virtual line (C7) One 2-3 electrode (RX3), one 2-4 electrode (RX4), and one 2-5 electrode (RX5) are disposed between (TX0). Here, one 2-4th electrode (RX3), one 2-4th electrode (RX4), and one 2-5th electrode (RX5) may have substantially the same top surface area.

FIG. 35 is a diagram showing the 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 2-1 electrodes RX1 disposed on the fourth virtual circle C4 are connected in parallel to each other through traces, and the 2-2 electrodes RX2 ) are also connected in parallel to each other through traces.

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

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

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

Meanwhile, as another embodiment of the present invention, the touch sensor 550 shown in FIG. 5 includes second electrodes (RX1, RX2, RX3, RX4, The array structure and routing structure of RX5) can be introduced.

The features, structures, effects, etc. described in the embodiments above are included in one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

In addition, although the above description focuses on the embodiment, this is only an example and does not limit the present invention, and those skilled in the art will be able to understand the above without departing from the essential characteristics of the present embodiment. You will see that various modifications and applications not illustrated are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

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

Claims (18)

delete Includes a circular touch sensor,
The touch sensor is disposed on a single layer and includes a plurality of electrodes arranged to be spaced apart from each other on a plurality of virtual circles having a common center,
The plurality of electrodes include a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes are disposed in each of the plurality of virtual circles located at odd numbers from the center among the plurality of virtual circles,
The plurality of second electrodes are disposed in plurality on each of the virtual circles located at even numbers from the center among the plurality of virtual circles,
The plurality of virtual circles include first to seventh virtual circles,
The plurality of first electrodes include 1-0 to 1-7th electrodes disposed in each of the first, third, fifth, and seventh virtual circles among the first to seventh virtual circles,
The plurality of second electrodes are,
One or more 2-0 electrodes disposed on the second virtual circle;
a plurality of 2-1 electrodes, a plurality of 2-2 electrodes and a plurality of 2-3 electrodes disposed on the fourth virtual circle;
A plurality of 2-4 electrodes, a plurality of 2-5 electrodes, a plurality of 2-6 electrodes and a plurality of 2-7 electrodes disposed on the sixth virtual circle,
The 2-0 electrode is further disposed at the center,
The 2-0 electrode disposed on the second virtual circle and the 2-0 electrode disposed at the center are electrically connected to each other.
According to claim 2,
When the touch sensor is driven in mutual driving mode,
The plurality of first electrodes are one of a driving electrode that outputs a driving signal and a receiving electrode that receives a detection signal, and the plurality of second electrodes are the other one.
According to claim 2,
The plurality of 2-1 electrodes, the plurality of 2-2 electrodes and the plurality of 2-3 electrodes include: 2-1 electrode - 2-2 electrode - 2-3 electrode - 2nd -2 The arrangement order of the electrodes is arranged so that it is repeated,
The plurality of 2-4 electrodes, the plurality of 2-5 electrodes, the plurality of 2-6 electrodes and the plurality of 2-7 electrodes are: 2-4 electrode-2-5 A touch input device arranged so that the arrangement order of electrode-2-6th electrode-2-7th electrode-2-6th electrode-2-5th electrode is repeated.
According to claim 4,
The top surface area of the 2-1 electrode and the 2-3 electrode is larger than the top surface area of the 2-2 electrode,
The top surface area of the 2-4th electrode and the 2-7th electrode is larger than the top surface area of the 2-5th electrode and the 2-6th electrode,
Any one of the 1-0 to 1-7th electrodes arranged on the third virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle Between the electrodes, a portion of the 2-1 electrode, all of the 2-2 electrode, and a portion of the 2-3 electrode are disposed,
Any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the seventh virtual circle A touch input device in which a portion of the 2-4th electrode, all of the 2-5th electrode, all of the 2-6th electrode, and a portion of the 2-7th electrode are disposed between the electrodes.
According to 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 2-1 electrode - 2-2 electrode - 2-3 electrode. are arranged so that they are repeated,
The plurality of 2-4 electrodes, the plurality of 2-5 electrodes, the plurality of 2-6 electrodes and the plurality of 2-7 electrodes are: 2-4 electrode-2-5 A touch input device arranged so that the arrangement order of electrodes - 2nd-6th electrodes - 2nd-7th electrodes is repeated.
According to claim 6,
The top surface areas of the 2-1 electrode, the 2-2 electrode, and the 2-3 electrode are the same,
The top surface areas of the 2-4th electrode, the 2-5th electrode, the 2-6th electrode, and the 2-7th electrode are the same,
Any one of the 1-0 to 1-7th electrodes arranged on the third virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle Between the electrodes, the 2-1 electrode, the 2-2 electrode, and the 2-3 electrode are disposed,
Any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the seventh virtual circle A touch input device in which the 2-4th electrode, the 2-5th electrode, the 2-6th electrode, and the 2-7th electrode are disposed between the electrodes.
delete Includes a circular touch sensor,
The touch sensor is disposed on a single layer and includes a plurality of electrodes arranged to be spaced apart from each other on a plurality of virtual circles having a common center,
The plurality of electrodes include a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes are disposed in each of the plurality of virtual circles located at odd numbers from the center among the plurality of virtual circles,
The plurality of second electrodes are disposed in plurality on each of the virtual circles located at even numbers from the center among the plurality of virtual circles,
The plurality of virtual circles include first to seventh virtual circles,
The plurality of first electrodes include 1-0 to 1-7th electrodes disposed in each of the first, third, fifth, and seventh virtual circles among the first to seventh virtual circles,
The plurality of second electrodes are,
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 2-3 electrodes, a plurality of 2-4 electrodes and a plurality of 2-5 electrodes disposed on the sixth virtual circle,
The 2-0 electrode is further disposed at the center,
The touch input device wherein the 2-0 electrode disposed on the second virtual circle and the 2-0 electrode disposed at the center are electrically connected.
According to clause 9,
When the touch sensor is driven in mutual driving mode,
The plurality of first electrodes are one of a driving electrode that outputs a driving signal and a receiving electrode that receives a detection signal, and the plurality of second electrodes are the other one.
According to clause 9,
The plurality of 2-1 electrodes and the plurality of 2-2 electrodes are arranged so that the arrangement order of 2-1 electrode - 2-2 electrode is repeated,
The plurality of 2-3 electrodes, the plurality of 2-4 electrodes, and the plurality of 2-5 electrodes include: 2-3 electrode-2-4 electrode-2-5 electrode-2 -A touch input device arranged so that the arrangement order of the four electrodes is repeated.
According to clause 9,
The top surface areas of the 2-1 electrode and the 2-2 electrode are the same,
The top surface areas of the 2-3 electrode and the 2-5 electrode are the same,
The top surface area of the 2-4 electrode is half of the top surface area of the 2-3 electrode and the 2-5 electrode,
Any one of the 1-0 to 1-7th electrodes arranged on the third virtual circle and any one of the 1-0 to 1-7th electrodes arranged 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 the 1-0 to 1-7th electrodes arranged on the fifth virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the seventh virtual circle A touch input device in which a portion of the 2-3 electrode, all of the 2-4 electrode, and a portion of the 2-5 electrode are disposed between the electrodes.
According to clause 9,
The top surface areas of the 2-1 electrode and the 2-2 electrode are the same,
The top surface areas of the 2-3 electrode, the 2-4 electrode, and the 2-5 electrode are the same,
Any one of the 1-0 to 1-7th electrodes arranged on the third virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle Between the electrodes, the 2-1 electrode and the 2-2 electrode are disposed,
Any one of the 1-0 to 1-7th electrodes arranged on the fifth virtual circle and any one of the 1-0 to 1-7th electrodes arranged on the seventh virtual circle A touch input device wherein the 2-3rd electrode, the 2-4th electrode, and the 2-5th electrode are disposed between the electrodes.
According to claim 2 or 9,
A touch input device wherein the top surface area of each of the plurality of electrodes is uniform.
comprising a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes include: a first group of first electrodes; a second group of first electrodes surrounding the first group of first 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 more 2-0 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 2-3 electrodes disposed between the first electrodes of the second group and the first electrodes of the third group; and a plurality of 2-4 electrodes, a plurality of 2-5 electrodes, and a plurality of 2-6 electrodes disposed between the third group of first electrodes and the fourth group of first electrodes. And a plurality of 2-7th electrodes;
A touch sensor, wherein one 2-0 electrode electrically connected to the one or more 2-0 electrodes is further disposed in a portion surrounded by the first electrodes of the first group.
comprising a plurality of first electrodes and a plurality of second electrodes,
The plurality of first electrodes include: a first group of first electrodes; a second group of first electrodes surrounding the first group of first 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 more 2-0 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 second group of first electrodes and the third group of first electrodes; and a plurality of 2-3 electrodes, a plurality of 2-4 electrodes and a plurality of 2-5 electrodes disposed between the third group of first electrodes and the fourth group of first electrodes. Contains ;,
A touch sensor, wherein one 2-0 electrode electrically connected to the one or more 2-0 electrodes is further disposed in a portion surrounded by the first electrodes of the first group.
The method of claim 15 or 16,
The plurality of first electrodes are one of a driving electrode that outputs a driving signal and a receiving electrode that receives a detection signal, and the plurality of second electrodes are the other one.
The method of claim 15 or 16,
A touch sensor, wherein the top surface area of each of the plurality of electrodes is uniform.

Images