KR20100126140A - Electrode pattern structure of capacitive touch panel - Google Patents

Abstract

PURPOSE: An electrode pattern structure of an electrostatic capacitance touch panel is provided to reduce the fabrication cost thereof and simplify the fabrication process thereof by forming an electrode pattern and wires in one ITO(Indium Tin Oxide) layer on one surface of the substrate. CONSTITUTION: A unit pad(210) for forming a detection electrode is arranged in an X axis, and is formed in first and second divided pads(211,212). The first column includes a first spit pad which is getting large in the X axis, and a second split pad which is getting small in the X axis. A second column comprises a first split pat which is getting small in the X axis, and a second split pad which is getting large in the X axis. A third column includes unit pads which are distanced from each other and formed at the left and right portions of the third column. The unit pads are connected to the wire units of the lateral surface through a wiring pattern.

Description

Electrode pattern structure of capacitive touch panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch panel, and in particular, by implementing a pattern structure and wiring of an electrode in one ITO layer for capturing position and movement state by capacitance, the structure of the pattern is simplified, manufacturing is easy, and price An electrode pattern structure of this inexpensive capacitive touch panel is provided.

According to the miniaturization of electronic devices, a touch panel is used as an input device. A display device is provided on the back of the touch panel so that an image emitted from the touch panel is transmitted to the user through the touch panel, and the user views the image. When a command is applied by touching the touch panel, the electronic device performs a user's command.

That is, it is possible to input various commands as an input device implemented by a touch panel without providing an input device such as a separate mechanical button.

The touch panel is a technology that can detect the input position on the touch panel by the capacitive method, the trend is that when a person touches the touch panel with a finger, a minute current flows through the capacitance, In such a manner that the contact position can be detected from the amount of current, the capacitance is formed by touching the dielectric film formed on the electrode with a finger.

As one example of the technology related to the capacitive touch panel, there is a patent application filed by Seiko Epson Co., Ltd. (Publication No. 10-2008-0080913).

1 and 2 illustrate a technique of Publication No. 10-2008-0080913, in which an encapsulation substrate 12 is fixed and stacked by an encapsulation resin 13 on an element substrate 11 for displaying an image. The encapsulating substrate 12 is different from the first detecting electrode 14 while being formed on the outer surface side of the encapsulating substrate 12 and the first detecting electrode 14 formed on the opposite surface side of the encapsulating substrate 12. The first and second detection electrodes 14 and 18 through a second detection electrode 18 having a detection axis, a dielectric film 15 stacked on the second detection electrode 18, and a dielectric film 15. Detecting means 16 for detecting the position at which the capacitance is formed.

That is, the first detection electrode 14, the second detection electrode 18, the dielectric film 15, and the detection means 16 constitute a capacitive touch panel portion.

The sealing substrate 12 is made of a substrate having light transparency such as glass, quartz, plastic, and the like, and the detection electrodes 14 and 18 are each made of a transparent conductive material such as ITO.

FIG. 2 (a) is a plan view of the first detection electrode 14, FIG. 2 (b) is a plan view of the second detection electrode 18, and FIG. 2 (c) is the first detection electrode 14 and the second. In the first detection electrode 14, a plurality of diamond-shaped pad portions 14a are arranged at equal intervals along the Y-axis direction, and each pad portion ( 14a is formed in a stripe shape connected by the wiring portion 14b, and the wiring portion 14b is connected to the detection means 16. As shown in FIG.

As shown in Fig. 2 (b), the second detection electrode 18 has diamond pad portions 18a arranged at equal intervals along the X-axis direction, and each pad portion 18a is connected to the wiring portion 18b. It is formed in the stripe shape connected by the wiring part, and the wiring part 18b is connected to the detection means 16. As shown in FIG.

When a person makes a touch input, when a finger touches the dielectric film 15 while a uniform alternating voltage is applied to the first and second detection electrodes 14 and 18, the first and second detection electrodes 14 and 18 provide a first contact through the dielectric film 15. The capacitance is formed between the second detection electrodes 14 and 18 and the finger.

For this reason, current flows through the capacitance from the terminal portions formed on the first and second detection electrodes 14 and 18, and the detection means 16 detects the amount of current that flows due to the formation of the capacitance, and thereby the contact position of the finger is determined. Detect.

However, in the conventional capacitive touch panel, a diamond pattern of the first detection electrode 14 and the second detection electrode 18 is formed of an expensive ITO layer in the X-axis and Y-axis directions. The price of the electrode is increased, and the manufacturing process is complicated because a process of forming the first detection electrode 14 and the second detection electrode 18 on both sides with the sealing substrate 12 therebetween is required.

Therefore, in order to overcome the above-mentioned problems, the present invention forms an electrode pattern and wiring for detecting a moving state such as touch position and drag on one surface of a single ITO layer, thereby making it inexpensive and manufacturing process. There is a problem to propose an electrode pattern structure of a simplified capacitive touch panel.

In order to solve this problem, the present invention,

In the capacitive touch panel formed of a detection electrode and a dielectric layer formed of a plurality of unit pads on a transparent substrate,

The unit pad for forming the detection electrode is a plurality of unit pads having a predetermined shape is arranged in the X-axis direction, each unit pad is formed of a first and second split pad divided into two pads,

A first row formed such that the first partition pad of each unit pad gradually increases toward the X-axis direction, and the second partition pad gradually decreases in response to the increase of the first partition pad;

A second row formed such that the first partition pad of each unit pad gradually decreases toward the X-axis direction and the second partition pad gradually increases in response to the decrease of the first partition pad;

A third row formed on the left and right sides of the unit pads spaced apart from each other, and each unit pad is connected to the wiring part on the side surface by a wiring pattern, and the unit pad and the wiring pattern are formed to have different areas from each other;

Claim 1, 2nd row, and 3rd row are arranged alternately in the Y-axis direction, the first row and the second row is connected to the terminal portion by wiring the first partition pads of each row with respect to the X-axis direction, The second dividing pads of each row are wired with respect to the X-axis direction so as to be connected to the terminal portion.

The present invention is constructed in such a way that by implementing a pad pattern for detecting the X-axis and the Y-axis as one detection electrode, the cost is much lower than that of using two-layer detection electrodes formed of expensive ITO, and the manufacturing process is also simplified. It has a great effect on improving the competitiveness of the product.

In addition, by forming a pattern so that the wiring does not overlap, the wiring and the pattern can be simultaneously formed on one ITO without the need for a multi-layer board for wiring configuration. In addition, the manufacturing process has an effect that can be much simplified.

FIG. 3 is a view showing a first embodiment of the present invention, in which a pattern having capacitance is formed on the surface of a substrate 100 made of a light transmissive material such as glass, quartz, or plastic using ITO. The plurality of unit pads 111 and 121 in the X-axis and Y-axis directions are formed side by side in an N * M arrangement.

The unit pads 111 of the first row 110 have a rectangular shape and a plurality of unit pads 111 are arranged in the X-axis direction. The number of unit pads 111 in the X-axis direction may vary in proportion to the size of the touch panel. In FIG. 3, it is exemplified as having a total of 54 unit pads composed of 9 rows in the X-axis direction and 6 rows in the Y-axis direction, and will be described based on this.

The unit pad 111 of the first row 110 is divided into two pads on a plane to have a first split pad 112 and a second split pad 113.

The first splitting pad 112 and the second splitting pad 113 are divided in a bent form. The first splitting pad 112 on the left has an 'L' shape, and the second splitting pad 113 on the right is divided. It is divided into 'a' forms.

In this case, the first partition pad 112 and the second partition pad 113 have a size of 1: 9 in the first row 110 and the first row 110, and thereafter, 9: 1 in the ninth row of the first row 110. Gradually, the size of the first split pad 112 is increased to have a large capacitance, and thus the capacitance is increased. Accordingly, the second split pad 113 is gradually reduced in size, thereby reducing the capacitance.

The ratio of the first dividing pad 112 and the second dividing pad 113 varies depending on the number of unit pads 111 in the X-axis direction. For example, when the number of unit pads in the X-axis direction is N, The ratio of the first division pad to the second division pad of the unit pad is 1: N, and the ratio of the last unit pad is N: 1.

In contrast to the first row 110, the second row 120 has a size of 9: 1 between the first partition pad 122 and the second partition pad 123 of the unit pad 121. 120) In the ninth column, the size of the first split pad 122 gradually decreases to have a size of 1: 9, and thus the capacitance decreases. In response, the second split pad 123 gradually increases in size, thereby causing the blackout. The capacity increases.

Of course, the unit pads 121 of the second row 120 have the L-shaped shape as the unit pads 111 of the first row 110 have the 'L' shape, and The dividing pad 123 is divided into a '-' shape.

The first row 110 and the second row 120 are alternately arranged in the Y-axis direction so that the first row, the third row, and the fifth row have columns of the same unit pattern, and the second row, The fourth row and the sixth row also have unit pattern columns of the same type.

In addition, wiring is performed by the wiring unit 130 so that the first split pads 112 in the first row 110 are connected to each other. Similarly, the wiring is connected by the wiring unit 13 so that the second split pads 113 are connected to each other. Is connected to the terminal portion 131.

As a result, the wiring is connected in the X-axis direction, and the wiring is not connected in the Y-axis direction.

In the second row 120 to the sixth row, the first partitioning pads are connected to each other by the first partitioning pads and the second partitioning pads are connected to the second partitioning pads by the wiring unit 130 and the terminal part 131. The terminal unit 131 detects a contact position of a finger by a separate detection unit.

The present invention is configured such that the wiring unit 130 is not overlapped with each other, so that both the formation of the pattern and the wiring are formed on the ITO in one substrate 100.

That is, depending on the pattern formation state, the wirings may overlap each other. Therefore, the wiring should be made by via holes or jump lines by mounting a separate multilayer board on the side of the substrate. By forming the structure of the design and manufacturing is easy, and the structure is very simple.

Referring to the process of confirming the contact position of the finger, when a person touches a certain position (T) with a finger, the position is detected from the capacitance of the unit pad contacted, where the detection means Since the position of the row of the position is known and the capacitance value according to the ratio of the size of the first and second partition pads is known, the contact position can be detected through this.

That is, if the position of a row is known and the position according to the ratio of the magnitude | size of a 1st partition pad and a 2nd partition pad is known, the two-dimensional position of a X direction and a Y direction can be detected.

On the other hand, when the user drags while the finger is in contact, that is, multi-touch is also possible. In this case, when the contact portion T is moved to the right or left direction in the X-axis direction, the power failure of the neighboring unit pad in the moving direction is achieved. The capacitance value is sequentially changed to detect the moving direction and distance.

In addition, when moving in the Y-axis or diagonal direction, since each row is disconnected in the Y-axis direction with neighboring rows, the neighboring rows are not affected, and the detecting means has capacitance of the unit pad for the row and the corresponding column. The movement of the finger can be detected by detecting a change in value.

FIG. 4 is a diagram illustrating a second embodiment of the present invention, in which the unit pads 211 in the first row 210 are diagonally disposed on the first partition pad 212 and the second partition pad 213 on the substrate 200. Divided into.

In this case, as in the first embodiment, the first partition pad 212 and the second partition pad 213 have a size of 1: 9 in the first row 210, the first column, and then the first row 200. In the ninth column, the size of the first split pad 212 is gradually increased to have a size of 9: 1, thereby increasing the capacitance, and correspondingly, the second split pad 213 is gradually reduced in size and thus has a small capacitance. Lose.

Similarly to the first row 210, the second row 220 also has a size of 9: 1 between the first partition pad 222 and the second partition pad 223 of the unit pad 221. Then, in the ninth column of the second row 220, the first partition pad 222 is gradually reduced in size to have a size of 1: 9, and thus the capacitance is reduced. Gradually larger in size, larger capacitance.

The structure of the wiring part 230 and the terminal part 231 is also comprised similarly to 1st Embodiment.

Since only the shape of the unit pads 210 and 220 is different in the second embodiment of the present invention, other parts will be the same as the first embodiment of the present invention and will not be described in detail.

FIG. 5 illustrates a third embodiment of the present invention, wherein the unit patterns 311 and 321 of the first row 310 and the second row 320 formed on the substrate 300 are similar to the first embodiment. Only the form in which the first split pads 312 and 322 and the second split pads 313 and 323 are changed from 'b' to 'b' and 'b' to 'a' is different.

In addition, as in the first embodiment, in the first row 310, the wiring unit 340 is configured such that the first partition pad 312 is connected to the first partition pads and the second partition pad 313 is connected to the second partition pads. Is connected by.

Similarly for the first splitting pad 312 and the second splitting pad 322 of the second row 320, the first splitting pad is connected to the first splitting pads, and the second splitting pad is connected to the second splitting pads. 340 is connected.

The third row 330 is formed differently from the shape of the first row 310 and the second row 320. Two unit pads 331 and 333 in a rectangular shape are formed on the left and right sides of the substrate 300 by being separated from each other. The unit pads 331 and 333 have an undivided form.

At this time, the unit pad 331 on the left side is connected to the wiring unit 340 on the left side through the wiring pattern 332. In this case, the wiring pattern 332 is formed to have a different area from the unit pattern 331 to form the unit pattern ( 331 has a separate capacitance.

In addition, the unit pad 333 on the right side is also connected to the wiring unit 341 on the right side through the wiring pattern 334. In this case, the wiring pattern 334 is formed in a different area from the unit pattern 333, so that the unit pattern Has a capacitance separate from 333.

From the fourth row or less, the first row 310, the second row 320, and the third row 330 are repeated, and the number of repetitions varies depending on the size of the substrate 300.

However, the same pattern as the third row 330 is formed to be repeated in the form of being positioned between even rows, and each row is not electrically connected to each other.

This third embodiment is similar to the first embodiment but has a higher detection rate for the position.

That is, when the ratio of the first split pads 312 and 322 to the second split pads 313 and 322 in the unit pads 311 and 321 of the first row 310 or the second row 320 is large (for example, 1:36 or larger). The detection rate for the position may drop.

By arranging the third row 330 including the wiring pattern 332, the unit pad 331, the unit pad 333, and the wiring pattern 334, accurate finger position can be detected.

For example, when a finger touches the position of 'T', a part of the second row 320 and the fourth row is in contact with the wiring pattern 332 on the left side and the unit pad 331. In addition, the unit pads 331 and 333 and the wiring patterns 332 and 334 may serve as reference for the position even when moving by dragging.

In the third embodiment, like the first and second embodiments, since a pattern and a wiring are simultaneously formed on one substrate 300, a separate multilayer board for wiring is not required.

In addition, the unit pad may be configured to be divided into a first partition pad and a second partition pad diagonally as in the second embodiment.

6 illustrates a fourth embodiment of the present invention, wherein the unit pads 411 of the first row 410 on the left side of the first row 410 on the substrate 400 are vertically divided into a first partition pad 412 and a second partition. The pad 413 is divided.

At this time, the first partition pad 412 and the second partition pad 413 in the first column of the left first row 410 have a size of 1: 3, and in the third column of the first row 410, the 3: The size of the first split pad 412 is gradually increased to have a size of 1 to increase the capacitance, and correspondingly, the second split pad 413 is gradually reduced in size, thereby reducing the capacitance.

The left first row 410 is repeated in the same pattern in the Y-axis direction to form M rows.

Each of the first split pads is connected to each other in the Y-axis direction by the wiring unit 430 on the right side, so that the first split pads of all the rows are connected to each other.

The second dividing pads of each row are connected to each other, and are independently connected to the wiring portion 433 on the left side, and are connected to the terminal portion 435.

On the other hand, each row on the left side is formed in a mirror shape on the right side. In the first row 420 of the right side, the first partition pad 422 and the second partition pad 423 have a size of 3: 1. Then, in the third row of the first row 420 and the third column, the size of the first split pad 422 gradually decreases to have a size of 1: 3, thereby reducing the capacitance, and correspondingly, the second split pad 423 Gradually larger in size, larger capacitance.

The first split pads of the rows on the right side are connected to the wiring unit 431 formed in the Y-axis direction on the right side, so that the first split pads of all the rows are connected to each other.

In addition, the second splitting pads of each row are connected to each other and independently connected to the wiring part 434 on the right side, and are connected to the terminal part 435.

In the fourth embodiment having such a configuration, by dividing the unit pattern to the left and right sides and arranging the pattern form in a mirror manner, the size of the first and second split pads can be greatly increased, which makes it possible to detect the contact position of the finger. It will be easier. In addition, the wiring units 430, 431, 433, and 434 do not overlap each other, so that both the pattern and the wiring may be formed on one substrate.

And, as in the first and second embodiments, the unit pad may be configured to be divided into a first split pad and a second split pad in a bent or diagonal line.

1 is a view showing the structure of a conventional capacitive touch panel.

FIG. 2 shows a pattern of the detection electrode of FIG. 1; FIG.

Figure 3 is a view showing a pattern of the pad portion according to the first embodiment of the present invention.

Figure 4 is a view showing the pattern of the pad portion according to the second embodiment of the present invention.

5 is a view showing a pattern of the pad portion according to the third embodiment of the present invention.

Figure 6 is a view showing a pattern of the pad portion according to the fourth embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

100: substrate

210: unit pad

211: first partition pad

212: second partition pad

400: wiring section

410: terminal portion

Claims (7)

In the capacitive touch panel formed of a detection electrode and a dielectric layer formed of a plurality of unit pads on a transparent substrate, The unit pad for forming the detection electrode is a plurality of unit pads having a predetermined shape is arranged in the X-axis direction, each unit pad is formed of a first and second split pad divided into two pads, A first row formed such that the first partition pad of each unit pad gradually increases toward the X-axis direction, and the second partition pad gradually decreases in response to the increase of the first partition pad; A second row formed such that the first partition pad of each unit pad gradually decreases toward the X-axis direction and the second partition pad gradually increases in response to the decrease of the first partition pad; A third row formed on the left and right sides of the unit pads spaced apart from each other, and each unit pad is connected to the wiring part on the side surface by a wiring pattern, and the unit pad and the wiring pattern are formed to have different areas from each other; Claim 1, 2nd row, and 3rd row are arranged alternately in the Y-axis direction, the first row and the second row is connected to the terminal portion by wiring the first partition pads of each row with respect to the X-axis direction, An electrode pattern structure of a capacitive touch panel configured to be connected to a terminal portion by wiring between the second division pads of each row in the X-axis direction. The electrode pattern structure of claim 1, wherein the first and second split pads are configured such that portions facing each other have a shape corresponding to each other. The electrode pattern structure of claim 2, wherein portions of the first and second split pads facing each other are configured to have a bent shape or an oblique shape. The electrode pattern structure of claim 1, wherein the second partition pads in the second row facing the first partition pads in the first row have the same area or shape. In the capacitive touch panel formed of a detection electrode and a dielectric layer formed of a plurality of unit pads on a transparent substrate, The unit pad for forming the detection electrode includes a plurality of unit pads having a predetermined shape arranged in the X-axis direction, and each unit pad is formed of first and second split pads divided into two pads. One partition pad is gradually enlarged toward the X-axis direction, and the second partition pad is formed to gradually decrease in correspondence with the increase of the first partition pad. Wiring is performed on one side so that the first split pads of each row are connected to each other in the axial direction and connected to one wire formed on one side, and the second split pads of each row are wired to the other side with respect to the X axis direction. An electrode pattern on the left side configured to be independently connected to the wiring part; Electrode pattern structure of a capacitive touch panel comprising an electrode pattern on the right side formed in a mirror shape on the right side of the electrode pattern on the left side. The electrode pattern structure of claim 5, wherein the first and second split pads are configured such that portions facing each other have a shape corresponding to each other. The electrode pattern structure of claim 6, wherein portions of the first and second split pads that face each other are configured to have a bent shape or an oblique shape.

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