TWI567623B - Touch panel, and touch input device having uniform sensitivity over the touch surface with improved resistance feature - Google Patents

Description

Touch panel and improved resistance characteristics on the touch surface Uniform sensitivity touch input device

The present invention relates to a touch electrode pattern, and more particularly to a touch panel having the touch electrode pattern and a touch input device using the touch panel.

The touch input device refers to an input device capable of sensing the position (coordinate) of an input item such as a finger on the touch panel, and providing the sensed position and related information as input information. The most representative are resistive and capacitive. Capacitive types are mainly self-capacitance and mutual capacitance. The mutual capacitance type includes a driving electrode and a sensing electrode composed of a transparent conductive material, and the extending directions of the driving electrode and the sensing electrode are generally different, but in some embodiments, the directions of the two electrodes may also be perpendicular to each other.

A capacitance can be formed between the sensing electrode and the driving electrode, and in particular, a capacitance can be formed mostly at the intersection of the two electrodes. This intersection area is in this specification They are collectively referred to as "capacitor nodes" or "nodes." Since more than one drive electrode and more than one sense electrode will be provided on one touch panel, there will be more than one of the above touch nodes.

When a finger touches the touch node or contacts a position near the touch node, a capacitance value formed between the sensing electrode and the driving electrode forming the touch node will change. Therefore, it can be known whether the finger touches the touch panel by measuring whether the capacitance value formed between the sensing electrode and the driving electrode is changed.

In order to determine whether the capacitance formed between the contact electrode and the drive electrode changes, if a current is supplied to a specific drive electrode, the N sense electrodes (N) crossing the specific drive electrode may be applied. 1) Inject the charge. The amount of charge injected will vary with the change in capacitance value formed by each of the specific drive electrodes and the N sense electrodes described above. Therefore, the amount of charge injected into the one or more sensing electrodes is measured, and by comparison, it can be determined whether there is touch input of the N touch nodes formed by the specific driving electrode and the N sensing electrodes. Node and touch input location. Since the processing is performed by a plurality of driving electrodes, the touch input position with respect to the entire area of the touch panel can be determined.

When the sensing electrode and the driving electrode are mounted on the same layer, a pattern having a complicated pattern is designed in order to electrically insulate the respective sensing electrodes from the driving electrodes. In such a pattern, there are wirings for connecting to the driving electrodes or the sensing electrodes. In the above It is difficult to configure the drive electrode or the sense electrode in the area occupied by the line. At this time, since the capacitance formed at each of the touch nodes is formed between the driving electrode and the sensing electrode, there is a problem in that the area occupied by the wiring does not play a role in the capacitance change of each touch node. Thus, the area occupied by this wiring is referred to as a so-called "dead zone" in this specification.

In order to solve this problem, a plurality of driving electrode patterns and sensing electrode patterns can be developed, but in the process, a problem that the resistance of the individual driving electrodes or the sensing electrodes becomes large will occur. If the above resistance becomes large, the value of the electrical time constant (τ) changes in an undesired direction. Therefore, it is necessary to prevent the above-mentioned resistance value from rising.

The present invention will provide a technique that not only reduces the resistance value described above, but also minimizes the effects of the area occupied by the wiring.

In order to solve the above problems, the present invention installs a single driving electrode unit in a single sensing electrode unit, thereby enabling formation of a single touch node.

At this time, a plurality of sensing electrode units are gathered to form one sensing electrode, and a plurality of driving electrode units are gathered to form one driving electrode.

In addition, the outer edges of the individual sensing electrode units are rectangular, and are mounted in the sensing electrode unit, and the single driving electrode unit is vertically symmetrical.

At this time, the above-described single driving electrode unit must be connected to the driving wiring, and in order to be connected to the driving wiring, a slit can be formed in a single sensing electrode unit. That is, a single sensing electrode unit is like a hollow donut, but because In the above slit, it is impossible to form a completely separated closed curve inside and outside of the above single sensing electrode unit.

The single sensing electrode unit and the single driving electrode unit mounted therein may be defined as a conceptual touch node, since the receiving effective area of each touch node is determined according to the area occupied by the edge of the single driving electrode. of. Therefore, the influence of the dead zone existing between the touch nodes can be reduced, and in order to maximize the receiving effective area of each of the touch nodes, the shape of the single driving electrode unit in the present invention will be Maximize expansion within the allowable range.

In addition, while maintaining the maximum configuration of the reception effective area of each of the above-described touch nodes, a pattern shape capable of reducing the resistance of the sensing electrode or the driving electrode will be provided.

According to the present invention, for a touch panel in which the sensing electrode and the driving electrode are mounted on the same layer, the arrangement pattern of the electrodes can minimize the influence of the dead zone caused by the wiring existing between the sensing electrode and the driving electrode. And it is possible to reduce the resistance of the sensing electrode or the driving electrode.

11‧‧‧Drive wiring

81‧‧‧ Receiving field

110‧‧‧ drive electrode

111‧‧‧Drive electrode unit

1111‧‧‧Drive electrode unit section

120‧‧‧Induction electrode

121‧‧‧Sensor electrode unit

1211‧‧‧ vertical part

1212‧‧‧ horizontal section

1214‧‧‧Edge

301‧‧‧ touch node

510‧‧‧Electromagnetic field

600‧‧‧ fingers

DZ‧‧‧ Dead Zone

L1, L2, W1, W2, W3‧‧‧ width

TA‧‧‧ occurrence field

A510‧‧‧Field

E1‧‧‧ end

SL‧‧‧ gap

SLD‧‧‧ gap

Source‧‧‧ source point

Csense‧‧‧ mutual capacitance

1a and 1b are diagrams for explaining the operation of the touch panel formed on the same layer of the sensing electrode and the driving electrode.

Figure 2a illustrates a single touch node in accordance with one embodiment of the present invention.

FIG. 2b illustrates a touch node having a left-right symmetric shape corresponding to the touch node of FIG. 2a.

Figure 2c illustrates a distributable field of electromagnetic field absorbed by a finger according to the touch node of Figure 2b, illustrated in Figure 1a.

FIG. 2d illustrates a configuration in which the touch nodes illustrated in FIGS. 2a and 2b are mounted in a vertical direction.

3a, 3b, and 3c illustrate various electrode patterns present on one layer of a touch panel in accordance with one embodiment of the present invention.

4a, 4b, and 4c illustrate an example of an electronic characteristic of a touch panel according to an embodiment of the present invention.

5a, 5b, and 5c illustrate an example of electronic characteristics of a touch panel according to a touch node shape according to a comparative embodiment of the present invention.

6a, 6b, and 6c illustrate an example of a touch node according to another comparative embodiment of the present invention, and an electronic characteristic of the touch panel according to the shape of the touch node.

7a and 7b respectively illustrate patterns of touch nodes in accordance with various embodiments of the present invention.

8a, 8b, and 8c illustrate examples of patterns of sensing electrode units and driving electrode units in accordance with various embodiments of the present invention.

In order to make it easy for people with the basic knowledge of the field to which the present invention pertains The embodiments of the present invention will be explained and illustrated in detail below with reference to the drawings. However, the present invention is not limited to the embodiments explained herein, and the present invention can be embodied in many different forms. The vocabulary used below is for reference only to specific embodiments and is not intended to limit the invention. In addition, the singular forms used hereinafter also include the plural forms. In order to make the description more concise, the additional drawings in the present specification are only a part or a part of the reduction. When the embodiment of the present invention shows the actual situation, the scale of each part of the components shown in the figure will be different.

The touch panel according to an embodiment of the present invention may include a plurality of transparent electrodes elongated in a first direction, such as in a vertical direction. In addition, the touch panel may further include a plurality of transparent electrodes extending in the second direction, such as in the horizontal direction. Here, the first direction and the second direction may be directions perpendicular to each other, but are not limited thereto. For convenience in the present specification, electrodes extending in the vertical direction in the drawing are collectively referred to as sensing electrodes, and electrodes extending in the horizontal direction are collectively referred to as driving electrodes. However, in other embodiments, the interaction between the electrodes in the vertical direction and the electrodes in the horizontal direction is interchangeable.

In an embodiment of the invention, the sensing electrode and the driving electrode may be formed in the same layer. At this time, the intersection area of the sensing electrode and the driving electrode can be defined, and these intersection areas can be referred to as "touch nodes" respectively. These touch nodes can be arranged in a matrix. The intersection area, the touch node, and the respective elements of the matrix are concepts that correspond to each other. In the present invention, the touch node can be used as a standard unit for determining a touch input position in the touch panel.

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

At a certain time, the voltage of the first level (Vdrive) and the voltage of the second level (0 V) can apply a driving signal similar to the pulse sequence repeated in cycles to one of the driving electrodes. After the end of the specific time, the drive signal can be applied to the other drive electrodes. In addition to the drive electrodes that input the drive signals, a DC voltage, such as a voltage of 0 V, can be applied to the remaining drive electrodes. However, according to the embodiment, a configuration in which a driving signal is simultaneously applied to a plurality of driving electrodes can also be used.

1a and 1b are diagrams for explaining the operation principle of the touch panel formed on the same layer of the sensing electrode 120 and the driving electrode 110. As shown in FIG. 1b, after the touch input is completed by the finger 600, since a part of the electromagnetic field 510 emitted from the driving electrode 110 is absorbed and cut by the finger 600, the mutual capacitance between the driving electrode 110 and the sensing electrode 120 may be Change (Csense→Csense-△Csense). If the dynamic range of the mutual capacitance change caused by the touch input has a large value, it can help to determine whether there is a touch input. Therefore, the sensing electrode 120 and the driving electrode 110 are preferably configured to sufficiently provide an electromagnetic field 510 that is cut/distracted by a finger.

Figure 2a illustrates the construction of a single touch node in accordance with an embodiment of the present invention.

A single touch node includes a sensing electrode unit 121 and a driving electrode unit 111. The sensing electrode unit 121 and the driving electrode unit 111 are arranged in the same layer by electrical insulation.

The outer edge of the sensing electrode unit 121 is a rectangle, and the inner edge is a shape set in advance. In addition to the slit SL, the sensing electrode unit 121 is in the form of an empty donut.

The drive electrode unit 111 can be mounted inside the sensing electrode unit 121. Moreover, the structure of the driving electrode unit 111 itself may be symmetrical upper and lower, and left and right symmetrical. In order to apply a driving voltage to the driving electrode unit 111, the driving electrode unit 111 must be connected to the driving wiring 11. This drive wiring 11 is connected to the drive electrode unit 111 through a slit SL formed on a part of the sensing electrode unit 121. In other embodiments, the drive wiring 11 can also be connected to the drive electrode unit 111 by a hole in which the layer of the drive electrode unit 111 and the other layers are connected to each other.

FIG. 2b illustrates a touch node having a left-right symmetric shape corresponding to the touch node of FIG. 2a. The touch panel according to an embodiment of the present invention may be composed of the touch node in FIG. 2a and the touch node in FIG. 2b.

Figure 2c illustrates a distributable field A 510 of an electromagnetic field 510 that is absorbed by a finger, according to the touch node of Figure 2b, illustrated in Figure 1a. If a driving voltage is applied to the driving electrode unit 111, an electromagnetic field will be formed facing the adjacent sensing electrode unit 121. According to the touch node shown in FIG. 2c, the electromagnetic field 510 formed on the field A510 will be absorbed by the finger or the like.

FIG. 2d illustrates a configuration in which the touch nodes illustrated in FIGS. 2a and 2b are mounted in a vertical direction. At this time, the lower edge of the upper touch node that is close to each other is connected to the upper edge of the lower touch node.

Figure 3a illustrates various electrode patterns present on a layer of a touch panel in accordance with one embodiment of the present invention.

Figure 3a illustrates that the touch nodes are arranged in a matrix of 6 columns * 8 rows.

Here, the eight sensing electrode units arranged along each column are electrically connected to each other to form one sensing electrode. Drive wiring 11 will be installed between each row. The field in which the drive wiring 11 is mounted is collectively referred to as a dead zone DZ. The width of the dead zone DZ in Fig. 3 is exaggerated for convenience of explanation.

The six driving electrode units arranged along each row are electrically connected to each other outside the receiving area 81 through the driving wiring 11, and are separated by the sensing electrodes inside the receiving area 81. The six drive electrode units mounted along each column are electrically connected to each other outside the sense electrodes, and thus can be enabled as separate drive electrodes.

Looking closely at any of the columns illustrated in Figure 3a, the pair of touch nodes in Figure 2d are repeatedly arranged along the first direction (i.e., the vertical extension direction). That is, the touch nodes illustrated in FIGS. 2a and 2b are repeatedly and alternately mounted along the first direction.

Fig. 3b shows that any one of the six columns shown in Fig. 3a is selected, with the exception of the driving electrode unit, only the sensing electrode 120.

Figure 3c shows the selection of the first column in the 8 rows shown in Figure 3a, and In addition to the sensing electrodes, only the driving electrodes 110 are provided.

4a, 4b, and 4c illustrate a detailed example of a touch node according to an embodiment of the present invention, and the electronic characteristics of the touch panel are explained according to the shape of the touch node.

4a illustrates that since the pair of touch nodes illustrated in FIG. 2d are repeatedly arranged in the horizontal direction, eight drive wires 11 are mounted in one dead zone DZ.

Figure 4b is for the purpose of showing the specific dimensions of the electrode pattern of Figure 4a. The width of the single sensing electrode unit in the horizontal direction and the width in the vertical direction are L1 and L2, respectively. The width of the portion extending in the vertical direction in the sensing electrode unit is W2, and the width of the portion extending in the horizontal direction in the sensing electrode unit is W1 and W3. Here, W1 is twice the width of both ends of the extended portion in the horizontal direction, and W3 is twice the width of the intermediate portion of the extended portion in the left-right direction.

The above will be stated in the following different ways. That is, the horizontal width of a single sensing electrode is L1. At this time, the width of each of the sensing electrode units in the vertical direction is L2. The width of the portion extending in the vertical direction in the sensing electrode unit is W2, and the width of the portion extending in the horizontal direction in the sensing electrode unit is W1 and W3. Here, W1 is twice the width of both ends of the extended portion in the horizontal direction, and W3 is twice the width of the intermediate portion of the extended portion in the horizontal direction.

An embodiment of the touch node illustrated in Figure 4b can satisfy the values in the table below.

At this time, the resistance value of the sensing electrode from the source point Source to the sink end shown in Fig. 4b is simulated to be 4.43 K?.

At this time, the four touch nodes illustrated in FIG. 4a can be referred to as upper left, upper right, lower left, and lower right respectively. As shown in FIG. 4a, when the state of the touch input is not completed, the sensing electrodes existing in each touch node are simulated. The capacitance value between the unit and the drive electrode unit can satisfy the values in the table below.

FIG. 4c illustrates the touch generation area TA that will occur when the center of the four touch nodes in FIG. 4a is in a circular touch. At this time, since the electromagnetic field distribution on the touch generation area TA is different due to the touch generation, the capacitance value between the sensing electrode unit and the driving electrode unit existing in the four touch nodes will be changed. change. The results of simulating the change in this capacitance are shown in the table below.

The electronic characteristics of the patterns in the above-mentioned Figs. 4a, 4b, and 4c are advantageous in comparison with other possible types of patterns. Next, comparison will be made by Comparative Example 1 and Comparative Example 2, Figs. 5a, 5b, 5c and 6a, 6b, and 6c.

<Comparative Example 1>

5a, 5b, and 5c illustrate an example of expressing the electronic characteristics of the touch panel according to the shape of the touch node thereof according to a comparative embodiment.

The form and arrangement of the touch nodes illustrated in FIGS. 5a, 5b, and 5c can be understood as the modifications shown in FIGS. 4a, 4b, and 4c. However, the width W1 of the left and right extended portions of the sensing electrode unit included in FIGS. 5a, 5b, and 5c has a constant value, which is different from that shown in FIGS. 4a, 4b, and 4c. The drawings shown in Figs. 5a, 5b, and 5c correspond to the planes shown in Figs. 4a, 4b, and 4c, and the same contents will be omitted, and only the differences will be described.

Figure 5b is a view showing the specific dimensions of the electrode pattern shown in Figure 5a. The horizontal width and the vertical width of one sensing electrode unit are L1 and L2, respectively, and the width of the portion extending in the vertical direction in the sensing electrode unit is W2, and the width of the portion extending in the horizontal direction in the sensing electrode unit is W1. Here, the 1/2 of the width W1 of the elongated portion in the horizontal direction in the sensing electrode unit has a constant value, which is different from FIGS. 4a, 4b, and 4c.

A specific example of the touch node shown in Figure 5b can satisfy the values in the table below. The values in the table below are consistent with the physical quantities corresponding to Figure 4b.

At this time, if the resistance value of the sensing electrode from the source point to the sink point shown in Fig. 5b is simulated, 5.38 K? appears. In comparison with the pattern shown in Fig. 4b above, the resistance value is 4.43 K?, and the pattern of the example of the present invention shown in Fig. 4b is much smaller in resistance.

At this time, the four touch nodes shown in FIG. 5a are respectively referred to as upper left, upper right, lower left, and lower right, and the sensing electrode unit and the driving electrode unit existing in each touch node are simulated in a state where no touch input is performed as in FIG. 5a. The capacitance value between the two can meet the values in the table below.

FIG. 5c shows the touch generation area TA that will occur when the center of the four touch nodes illustrated in FIG. 5a is circularly touched. In this case, the following figure provides a simulation of the capacitance change according to the touch generation field. The result of the value.

<Comparative Example 2>

6a, 6b, and 6c show examples of electronic characteristics of a pattern of a touch control according to other comparative embodiments.

The form and arrangement of the touch nodes shown in FIGS. 6a, 6b, and 6c can be understood as the modifications shown in FIGS. 4a, 4b, and 4c. However, Figures 4a, 4b, Fig. 4c shows a comparison of the inclination of the edge portion of the portion extending in the horizontal direction in the sensing electrode unit, and the inclination of the portion extending in the horizontal direction in the sensing electrode unit shown in Figs. 6a, 6b, and 6c. The difference that changes sharply toward the center. The diagrams shown in Figures 6a, 6b, and 6c correspond to the diagrams shown in Figures 4a, 4b, and 4c, and the common elements are omitted, and only the differences will be described.

Figure 6b is a specific capacitance for showing the electrode pattern shown in Figure 6a. The horizontal width and the vertical width of one sensing electrode unit are set to L1 and L2, respectively. The width of the portion extending in the vertical direction in the sensing electrode unit is W2, and the width of the portion extending in the horizontal direction in the sensing electrode unit is W1 and W3. Here, W1 is twice the width of both ends of the extended portion in the horizontal direction, and W3 is twice the length of the intermediate portion of the extended portion in the horizontal direction.

The values in the table below satisfy a specific example of the touch node shown in Figure 6b. The values in the table below are consistent with the physical quantities corresponding to Figure 4b.

At this time, Fig. 6b simulates that the resistance value of the sensing electrode from the source point to the sink point is shown to be 5.35 K?. In contrast, the resistance value of the pattern shown in FIG. 4b is compared 4.43 K?, the pattern according to one embodiment of the present invention shown in Figure 4b is more resistant and therefore more advantageous.

At this time, the four touch nodes shown in FIG. 6a are respectively referred to as upper left, upper right, lower left, and lower right, and the sensing electrode unit and the driving electrode existing in each touch node are simulated in the state where the touch input is not performed as in FIG. 6a. The capacitance value between the units satisfies the values in the table below.

The touch generation area TA that will occur when the center of the four touch nodes shown in FIG. 6c and FIG. 6a is in a circular touch. At this time, the following figure provides the result of simulating the capacitance change value based on the above-mentioned touch generation field.

<Comparison of Electronic Characteristics Between Embodiments of the Invention and Comparative Examples>

4a, 4b, and 4c of the following table show the electronic characteristics of the pattern of the touch node according to an embodiment of the present invention and are shown in accordance with Figs. 5a, 5b, 5c and 6a, 6b, and 6c. A comparison of the electronic characteristics of the pattern of the touch node of the comparative example.

According to the patterns of FIG. 4a, FIG. 4b, FIG. 4c, FIG. 5a, FIG. 5b, FIG. 5c and FIG. 6a, FIG. 6b, and FIG. 6e, the vertical width and the horizontal width of each of the sensing electrode units are set to a uniform value. The effects can be compared with each other only by the pattern of the sensing electrode unit. That is, since the uniform value of the elements other than the pattern of the patterns of the respective sensing electrode units is kept to the utmost, the technical effect difference depending on the pattern of the pattern of the sensing electrode unit can be verified.

According to Fig. 4a, Fig. 4b, Fig. 4c, according to the pattern provided by an embodiment of the present invention, the advantageous condition that the resistance value of the sensing electrode is the lowest can be known. 4a, 4b, and 4c, according to an embodiment of the present invention, the average change value of the capacitance has a larger average value than the comparative example according to the comparative examples of Figs. 5a, 5b, and 5c. Favorable effect.

Figures 7a and 7b respectively show the appearance of a touch node in accordance with mutually different embodiments of the present invention.

7a and 7b each include a sensing electrode unit 111 and a driving electrode unit 121 formed in the same layer as the touch node 301. The sensing electrode unit 121 is disposed around the driving electrode unit 111 electrostatically coupled to the sensing electrode unit 121 in the upper and lower horizontal directions. The sensing electrode unit 121 is constituted by a vertical portion 1211 which is formed to extend in the vertical direction and a horizontal portion 1212 which is formed to extend in the horizontal direction. At this time, the width of the horizontal portion 1212 shows a phenomenon in which the one end portion E1 of the horizontal portion 1212 gradually becomes thicker toward the other side end portion E2 and then gradually narrows again. In order to connect the driving wiring to the above-described driving electrode unit 111, a slit SL is formed on the above-described sensing electrode unit 121. Further, the sensing electrode unit 111 itself has a vertically symmetrical structure, and the sensing electrode unit 121 itself has a vertically symmetrical structure in addition to the slit SL portion which is formed to connect the driving wiring to the driving electrode unit 111.

The edge portion 1214 existing in the inner direction of the sensing electrode unit 121 in the horizontal portion 1212 in Fig. 7a has an arc shape convex toward the inner side direction.

The horizontal portion 1212 in FIG. 7b is along the inner side of the sensing electrode unit 121 It is a raised triangular shape.

Figures 8a, 8b, and 8c illustrate examples of patterns of sensing electrode units and driving electrode units in accordance with various embodiments of the present invention.

8a, 8b, and 8c are all based on the form of the sensing electrode unit shown in Figs. 7a and 7b.

In the driving electrode unit 111 of Fig. 8a, Fig. 8b, and Fig. 8c, there is a hollow portion like a donut. However, in order to extend the sensing electrode unit 121 from a portion of the vertical portion thereof so that a part of the sensing electrode is disposed at the hollow portion of the driving electrode unit 111, a slit SLD is also formed at a portion of the driving electrode unit 111.

A portion of the sensing electrode unit present at the hollow portion of the driving electrode unit 111 in Fig. 8b has a hollow donut form.

In the right and left center portions of the driving electrode unit 111 in Fig. 8c, there may be a driving electrode unit portion 1111 which is formed to extend in the vertical direction.

According to the same configuration as that of FIGS. 8a, 8b, and 8c, since a part of the sensing electrode unit 121 exists in the hollow portion of the driving electrode unit 111, the distribution of the electric field that receives the influence of the touch occurs in the center portion of the touch node. Can make the touch input characteristics better.

In the present specification, a plurality of sensing electrode units included in one sensing electrode are directly connected to the above-mentioned receiving and receiving field, and a plurality of driving electrode units included in one driving electrode are connected to the above-mentioned receiving field. Be explained. However, in other embodiments, it is possible to have the above-mentioned sensing electrode and driving electrode. The configuration of the mutual transformation is likely to be modified corresponding to the above embodiment.

The touch panel may be a rectangular shape as a whole, but is not limited to a rectangle, and may be provided as a curved figure but may also be provided as a flat figure. Depending on the specific shape of the touch panel, the appearance of the sensing electrode, the driving electrode, the sensing electrode unit, and the driving electrode unit may also vary.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

11‧‧‧Drive wiring

81‧‧‧ Receiving field

DZ‧‧‧ Dead Zone

Claims (13)

A touch panel includes: a driving electrode having a plurality of driving electrode units formed on a same layer; and sensing electrodes having a plurality of sensing electrode units, each of the sensing electrode units surrounding the sensing in an up, down, left, and right direction The driving electrode unit configured to electrostatically couple the electrode unit, the sensing electrode unit including a vertical portion formed to extend in a vertical direction and a horizontal portion formed to extend in a horizontal direction, the horizontal portion being shaped to have a width from the horizontal portion One end begins to slowly thicken toward the other end and then slowly narrows again. The touch panel of claim 1, wherein the horizontal portion has a convex triangular shape along an inner side direction of the sensing electrode unit. The touch panel according to claim 1, wherein an edge portion of the horizontal portion in the inner side direction of the sensing electrode unit has a convex arc shape toward the inner side direction. The touch panel of claim 1, wherein a slit is formed in the sensing electrode unit to connect the driving wiring to the driving electrode unit. The touch panel of claim 1, wherein the structure of the driving electrode unit is vertically symmetrical, and the sensing electrode unit has a slit formed by connecting the driving wiring to the driving electrode unit. The structure of the sensing electrode unit is also vertically symmetrical. The touch panel of claim 1, wherein the kth slit of the kth sensing electrode unit included in the sensing electrode is formed on a left side of the kth sensing electrode unit. The k+1th slit included in the k+1th sensing electrode unit included in the sensing electrode is formed on the right side of the k+1th sensing electrode unit. The touch panel of claim 6, wherein the hollow portion of the driving electrode unit is donut-shaped, and a slit is formed in a portion of the driving electrode unit, wherein the slit is the sensing electrode unit and There is a passage in which the electrodes at the hollow portion are connected to each other. The touch panel according to claim 7, wherein a vertical portion that separates the hollow portion from left to right is formed at right and left central portions of the drive electrode unit. A touch panel includes: a plurality of touch nodes arranged in a matrix form, having a driving electrode unit and sensing electrode units electrostatically coupled to the driving electrode unit and formed in the same layer, each of the sensing electrode units The left and right directions are disposed in a horizontal direction around the driving electrode unit electrostatically coupled to the sensing electrode unit, and the sensing electrode unit includes a vertical portion formed to extend in a vertical direction and a horizontal portion formed to extend in a horizontal direction, the horizontal portion The shape is a phenomenon in which the width gradually becomes thicker from one end of the horizontal portion toward the other end portion and then gradually narrows again. The touch panel according to claim 9, wherein the horizontal portion has a convex triangular shape along an inner side direction of the sensing electrode unit. The touch panel according to claim 9, wherein an edge portion of the horizontal portion in the inner side direction of the sensing electrode unit has a convex arc shape toward the inner side direction. The touch panel of claim 9, wherein a slit is formed in the sensing electrode unit to connect the driving wiring to the driving electrode unit. The touch panel of claim 12, wherein the structure of the driving electrode unit is vertically symmetrical, and the sensing electrode unit is formed in addition to the driving wiring unit for connecting the driving wiring to the driving electrode unit. In addition to the slits, the structure of the sensing electrode unit is also vertically symmetrical.