KR101637922B1 - Touch input device supporting two types of input mode - Google Patents

Touch input device supporting two types of input mode Download PDF

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Publication number
KR101637922B1
KR101637922B1 KR1020150079768A KR20150079768A KR101637922B1 KR 101637922 B1 KR101637922 B1 KR 101637922B1 KR 1020150079768 A KR1020150079768 A KR 1020150079768A KR 20150079768 A KR20150079768 A KR 20150079768A KR 101637922 B1 KR101637922 B1 KR 101637922B1
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South Korea
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electrode
branch
capacitance
touch panel
touch input
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KR1020150079768A
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Korean (ko)
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윤태현
안해솔
박성택
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주식회사 지니틱스
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

A first electrode extending in a first direction; A second electrode adjacent to the first electrode and extending in the first direction; And a touch panel including at least one unit structure including a first electrode, a second electrode, and a third electrode disposed between the first electrode and the second electrode and extending in the first direction. Provides technology that can select and provide touch input technology and mutual type touch input technology according to the situation.

Description

[0001] The present invention relates to a touch input device supporting two input modes,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a user input device used in a computing device, and more particularly to a touch input technique using a capacitive type.

A capacitive touch input technique is used as a user input device of a user device. Some capacitive touch input techniques may use a method of storing charge in a capacitor to be measured and then transferring the charge stored in the capacitor to be measured to another integral capacitor in the charge axis and storing it. The value of the capacitor to be measured can be obtained by measuring a value relating to the amount of charge stored in the integral capacitor. At this time, in the above-described touch input technique, the arrangement of the capacitors to be measured is designed so that the capacitance of the capacitors can be changed when a touch tool such as a finger of a person exists in the vicinity of the capacitors. Accordingly, it is possible to determine whether the touch input by the touch tool has been performed by measuring the size of the measurement object capacitance.

And may be classified into a self-type touch input technology and a mutual type touch input technology according to a method of providing the measurement object capacitor.

The self-contained touch input technology uses only one sensing electrode provided in advance to provide a capacitor to be measured. At this time, if there is no touch tool near the sensing electrode, the capacitance formed by the one sensing electrode ideally becomes zero. If a touch tool is present near the sensing electrode, a capacitance is generated between the sensing electrode and the touch tool. That is, the measurement object capacitor may be provided by the one sensing electrode and the touch tool. The magnitude of the capacitance that is generated (that is, changing) at this time is determined by the area and distance of the one sensing electrode and the touching tool facing each other. In the self-type touch input technique, the size of the capacitor to be measured becomes larger when the touch input is performed.

The mutual-type touch input technique uses one sensing electrode previously provided to provide a capacitor to be measured and one driving electrode provided in advance. At this time, a capacitance having a predetermined value may be formed according to the arrangement shape of the sensing electrode and the driving electrode. At this time, if there is no touch tool near the measurement target capacitor, the value of the capacitance having the predetermined value does not change. However, if a touch tool is present near the measurement object capacitor, the capacitance is reduced by the fringing capacitance of the measurement object capacitor removed by the touch tool. In a mutual type touch input technique, the size of a capacitor to be measured becomes smaller when a touch input is made.

The above-mentioned self-type touch input technology is more advantageous in a water-use environment than a mutual type touch input technology. Alternatively, the circuit of the touch input device in which the touch input technology is used may be in a so-called free space state in which the touch input device and the touch tool are not electrically connected to the touch tool, The above-mentioned self-type touch input technique is more disadvantageous than the mutual type touch input technique. As described above, the self-type touch input technology and the mutual type touch input technology have advantages and disadvantages. Therefore, there is a need for a technology capable of selecting a self-type touch input technology and a mutual type touch input technology in a single touch input device according to a situation.

The present invention provides a touch input device that supports two input modes depending on a situation.

According to one aspect of the present invention, a touch panel includes: a first electrode extending in a first direction; A second electrode adjacent to the first electrode and extending in the first direction; And a third electrode disposed between the first electrode and the second electrode and extending in the first direction. At this time, the third electrode is formed with at least one first branch penetrating toward the first electrode and at least one second branch penetrating toward the second electrode, and the unit structure is divided into the first A fringing capacitance value formed between the third electrode and the first electrode included in the first node among the plurality of nodes and a fringing capacitance value formed between the third electrode and the second electrode, A firing capacitance formed between the third electrode and the first electrode included in the second node among the plurality of nodes and the fringing capacitance formed between the third electrode and the second electrode, The shape of the first branch and the shape of the second branch are formed so as to be different from a second ratio between fringing capacitance values formed between the electrodes.

At this time, the first electrode, the second electrode, and the third electrode may be formed on the same layer by being insulated from each other.

In this case, the first ratio between the area of the first electrode included in the first node and the area of the second electrode may be the same as the ratio between the area of the first electrode included in the second node and the area of the second electrode. 2 ratio.

At this time, the first electrode is formed in a stepped shape in which the portion facing the second electrode is bent to the boundary of each node, and the portion of the second electrode facing the first electrode is bent to the boundary of each node A portion of the third electrode facing the first electrode and a portion of the third electrode facing the second electrode are formed in a stepped shape corresponding to the shapes of the first electrode and the second electrode, .

At this time, in each of the nodes, the first branch and the second branch are formed on the third electrode so as to extend linearly in a direction perpendicular to the first direction, and the first electrode is formed in a shape of the first branch And the second electrode may be formed so as to surround the second branch in correspondence with the shape of the second branch.

In the touch panel, the gap between the first electrode and the edge portion facing the third electrode may be different from each other in two different nodes.

The touch panel may be configured such that the extending distance between the first electrode and the edge portion facing the third electrode is different from that of the other two nodes.

According to an aspect of the present invention, there is provided a touch sensing apparatus including a sensing unit including the above-described touch panel and at least one sensing circuit, wherein one of the first electrode and the third electrode in the first operation mode Wherein the first electrode is connected to a potential that is either floating or having a constant value such that no current flows through the electrode, and in the second mode of operation, the electrode provides a current that varies with time .

According to another aspect of the present invention, there is provided a touch sensing apparatus including: the touch panel; And a sensing unit including at least one sensing circuit, wherein in the first mode of operation the third electrode is either floating or connected to a potential having a particular constant value such that a current flow through the third electrode is absent And in the second mode of operation the third electrode is adapted to be supplied with a current that varies with time. At this time, a first change value of the capacitance of the first electrode sensed by the sensing circuit connected to the first electrode among the one or more sensing circuits, and a sensing circuit connected to the second electrode of the one or more sensing circuits Based on the ratio between the first change value of the capacitance of the first electrode and the second change value of the capacitance of the second electrode that is sensed, it is determined which position on the extension line of the first direction the touch input is made.

According to the present invention, two types of touch input techniques can be provided to one touch input device. Further, depending on the current environment of the user, a more advantageous type of touch input technique can be selected and provided for the user to use.

1 illustrates a structure of a touch input device according to an embodiment of the present invention.
FIG. 2A shows an embodiment of the sensing unit when operating as a self-type, and FIG. 2B shows an embodiment of a sensing unit when operating as a mutual type.
3 illustrates a unit structure of a touch input electrode according to an embodiment of the present invention.
4 illustrates the shape of a third electrode according to an embodiment of the present invention.
FIG. 5 illustrates a unit structure, a branch area ratio, and a capacitance value of a touch input electrode according to another embodiment of the present invention.
Figure 6 illustrates a modified configuration of a branch according to one embodiment of the present invention.
7 shows a unit structure according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein, but may be implemented in various other forms. The terminology used herein is for the purpose of understanding the embodiments and is not intended to limit the scope of the present invention. Also, the singular forms as used below include plural forms unless the phrases expressly have the opposite meaning.

1 shows a structure of a touch input device 1 according to an embodiment of the present invention.

The touch input device 1 includes a sensing circuit 22 connected to a first electrode 111, a second electrode 112, a third electrode 12 and a first electrode, a second electrode and / or a third electrode, And a sensing unit 20 including the sensing unit 20.

In this embodiment, the first electrode 111 and the second electrode 112 may be sensing electrodes, and the third electrode 12 may be a driving electrode. In other embodiments, the first electrode 111 and the second electrode 112 may be a driving electrode, and the third electrode 12 may be a sensing electrode.

The sensing unit 20 may be provided as shown in FIG. 2A, for example, when operating as a self-type, and may be provided as shown in FIG. 2B, for example, when operating as a mutual type. However, the specific circuit of the sensing unit may be varied according to the embodiment, and the present invention is not limited by the specific circuit structure of the sensing unit.

When N sensing electrodes are provided, N independent sensing circuits 22 may be provided in the sensing unit 20, each of which is connected to N sensing electrodes. Alternatively, only the M (<N) sensing circuits may be provided, and the sensing circuits may be shared by time sharing to measure the amount of capacitance change for the N sensing electrodes.

3 illustrates a unit structure of a touch input electrode according to an embodiment of the present invention.

The touch input device 1 includes at least one unit structure 50 including a pair of electrodes including a first electrode 111 and a second electrode 112 to be described later and a third electrode 12 . A pair of electrodes composed of the first electrode 111 and the second electrode 112 and the third electrode 12 which will be described later are all assumed to extend along the y axis direction. Here, the first electrode and the second electrode may be the sensing electrode, the third electrode may be the driving electrode, and the sensing electrode and the driving electrode may be mutually different. In the present embodiment, the former is described as an example.

The shape of the 'pair of electrodes' according to an embodiment of the present invention may be as follows.

The pair of electrodes may include two first electrodes 111 and a second electrode 112 extending adjacent to each other along the y axis. If the touching tool is not sufficiently close to a particular sensing electrode, there is no ideally a capacitance between the particular sensing electrode and the touching tool. An event in which touch input is performed on a specific y coordinate of the first electrode 111 and the second electrode 112 may be denoted as TIy. When the event TIy occurs, the change amount of the capacitance value generated at the first electrode can be denoted by? C1, y as compared with the case where no touch input is made at all. When the event TIy occurs, the change amount of the electrostatic capacitance value by the second electrode can be denoted by? C2, y, as compared with the case where no touch input is made at all. At this time, the relative ratio of? C1, y and? C2, y, that is, the ratio of the capacitance change value, is determined. The shape of the first electrode and the second electrode is formed so that the ratio of the capacitance change value varies depending on a specific value of y.

The sensing electrode pair (i.e., a pair of electrodes) may be conceptually divided into a plurality of first type nodes along the y-axis direction. In one embodiment of the present invention, the shapes of the sensing electrodes may be designed such that the 'ratio of capacitance change values' to different first type nodes are different from each other. For example, in FIG. 3, the pair of electrodes may be divided into N first type nodes. For example, the area of the first electrode 111 of the first type node N 1 is set so that the ratio of the capacitance change value of the first type node N 1 to the first type node N 2 is different from that of the first type node N 1 , type of node (N 2) of and be greater than the area of the first electrode 111, the area of the second electrode 112 of the first type node (N 1) is the second electrode of the first type node (N 2) (112).

4 illustrates an example of a shape of a third electrode according to an embodiment of the present invention.

3 and 4 together.

The third electrode 12 may be formed on the same layer as the first electrode 111 and the second electrode 112. The third electrode 12 may extend in the y axis direction between the first electrode 111 and the second electrode 112 constituting the pair of electrodes. The third electrode 12 may not be electrically connected to the first electrode 111 and the second electrode 112 directly.

The third electrode 12 is provided with a plurality of first branches 121 projected in the direction of the first electrode 111 (-x direction) and a plurality of second branches 121 projecting in the direction of the second electrode 112 (in the + x direction) The first branch 121 has a shape to pierce the first electrode 111 and the second branch 122 has a shape to pierce the second electrode 112 . The edge portion of the first electrode 111 may have a shape corresponding to the shape of the first branch 121 and the edge portion of the second electrode 112 may have a shape corresponding to the shape of the second branch 122.

FIG. 5 illustrates a unit structure, a branch area ratio, and a capacitance value of a touch input electrode according to another embodiment of the present invention.

 5 (a) shows the 'unit structure' of the touch input electrode according to another embodiment of the present invention. The unit structure 50 including the pair of electrodes 111 and 112 and the third electrode 12 can be conceptually divided into a plurality of second type nodes along the y-axis direction. At least one first branch 121 and at least one second branch 122 may be provided for each of the plurality of second type nodes described above.

In the example shown in FIG. 5A, the shape of the first electrode portion included in each second type node and the shape of the second electrode have a rectangular shape. The different portions of the first electrode of the second type node have different areas and the different portions of the second electrode of the second type node have different areas. In the example shown in FIG. 5A, the first branch 121 and the second branch 122 have a simple shape extending in the horizontal direction (x-axis direction).

FIG. 5B shows the branch area ratio in each second type node shown in FIG. 5A.

The edge of the first branch 121 and the edge of the first electrode 111 can define a first length and the edge of the second branch 122 and the edge of the second electrode 121 can be defined, A second length in which the edges of the protrusions 112 face each other can be defined. At this time, a so-called 'branch ratio' between the first length and the second length may be defined. That is, the branch ratio can be designed to have a specific value for a specific second type node. 5 (b), reference numeral 501 denotes a ratio occupied by the first length, and reference numeral 502 denotes a ratio occupied by the second length.

The first branch 121 and the edge of the first electrode 111 may have a first gap of a certain size for mutual insulation. In addition, in a specific second type node, a gap of a certain size for mutual insulation may exist at the edge of the second branch 122 and the edge of the second electrode 111. At this time, the size of the first gap and the size of the second gap may be different from each other, and the ratio of the size may be defined as a 'gap ratio'. That is, it is possible to design the gap ratio to have a specific value for a specific second type node.

In an embodiment of the present invention, the second type node may be designed to have different branch ratios and / or different gap ratios.

The virtual boundary line between the second type nodes for each unit structure described above may be set equal to the virtual boundary line of the first type nodes for each sensing electrode pair.

5C shows the change amount 503 of the electrostatic capacitance value of the first electrode 111 and the change amount 504 of the capacitance value of the second electrode 112 when touch input is made to each of the second type nodes ) Are shown in the table. In this case, the unit of capacitance is pF.

Figure 6 illustrates a modified configuration of a branch according to one embodiment of the present invention.

7 shows a unit structure according to another embodiment of the present invention.

7 (a) shows a unit structure of a touch input electrode according to another embodiment of the present invention. The unit structure may include a first electrode 111, a second electrode 112, and a third electrode 12. The unit structure according to FIG. 7A can be divided into the above-mentioned second type nodes N 1 to N 8 . At this time, it can be seen that the first and second portions belonging to different second type nodes among the first electrodes are designed to have different gaps formed between the first branch and the first electrode.

The larger the gap size, the greater the possibility that the electric field formed between the first branch and the first electrode is disturbed by the external environment. It can be assumed that a touch input having the same area is generated in a region having a small gap and a region having a large gap. At this time, the fringing capacitance component of the area having a large gap is absorbed more in the touch input tool than in the area having a small gap size. Therefore, the capacitance change amount in the region where the gap size is large is larger than in the region where the gap size is small.

FIG. 7B shows a specific one of the second type nodes when the unit structure according to FIG. 7A is divided into the above-mentioned second type nodes. At this time, the gap between the third electrode 12 and the first electrode 111 may be equal to d. The size of the gap between the second electrode and the second electrode is smaller than d.

7C shows a relationship between the electrostatic capacitance value 503 of the first electrode 111 and the variation amount 504 of the electrostatic capacitance value 504 of the second electrode 112 when touch input is made to each second type node Respectively. In this case, the unit of capacitance is pF.

The operation principle of the first operation mode according to an embodiment of the present invention may be as follows.

In the first operation mode, the third electrode (e.g., driving electrode) is not utilized. To this end, the third electrode may be left floating or connected to a potential having a certain constant value. The first operating mode may be referred to as a self-operating mode.

In the first mode of operation, when the touching tool is not sufficiently close to a specific sensing electrode, there is no ideal capacitance between the sensing electrode and the touching tool.

An event in which a touch input is performed on a specific y coordinate of a first electrode (e.g., a sensing electrode) and a second electrode (e.g., a sensing electrode) may be denoted as TIy. When the event TIy occurs, the amount of change ΔC1, y of the capacitance value generated in the first electrode (compared with the case where no touch input is made at all) (I.e., the ratio of the capacitance change value) of the change amount? C2, y of the capacitance value by the capacitance?

The value of? C1, y can be measured using a sensing circuit connected to the first electrode, and the value of? C2, y can be measured using a sensing circuit connected to the second electrode. Using the ratio of measured ΔC1, y and ΔC2, y, the value of the y-coordinate at which the touch input was made can be calculated. At this time, the sensing circuit may be provided, for example, as shown in FIG. The configuration of the sensing circuit can be modified according to the embodiment.

The operation principle of the second operation mode according to an embodiment of the present invention may be as follows.

And utilizes the third electrode (e.g., the driving electrode) in the second operation mode. At this time, the sensing circuit connected to the third electrode and the first electrode (or the second electrode) (for example, the sensing electrode) may be configured as shown in FIG. 2B. In FIG. 2B, the third electrode corresponds to E1, and the first electrode (or second electrode) may correspond to E2. Alternatively, the third electrode may correspond to E2, and the first electrode (or second electrode) may correspond to E1. The configuration of the sensing circuit can be modified according to the embodiment.

In the present invention, the second mode of operation may be referred to as a mutual mode of operation.

A first fringing capacitance, which may be affected by a touch tool, may be formed between the edge of the third electrode and the edge of the first electrode. A second fringing capacitance, which may be affected by a touch tool, may be formed between the edge of the third electrode and the edge of the second electrode.

The size of the first fringing capacitance that can be influenced by the touch tool can be influenced by the first extension length of the edge portion where the third electrode and the first electrode face each other. That is, the longer the first extension length, the larger the first fringing capacitance can be. Likewise, the size of the second fringing capacitance, which can be influenced by the touching tool, can be influenced by the second extension length of the edge portions where the third electrode and the second electrode face each other. That is, the longer the second extension length, the larger the second fringing capacitance can be.

The sensitivity of the first fringing capacitance to external disturbances, which can also be influenced by the touching tool, can also be influenced by the size of the first gap between the third electrode and the opposite edge of the first electrode . That is, the larger the size of the first gap, the smaller the coupling force of the first fringing capacitance formed between the third electrode and the first electrode. Accordingly, when the touch tool is present in the vicinity, the larger the size of the first gap, the more easily the size of the capacitor for the first electrode can be changed. Likewise, the sensitivity of the second fringing capacitance to external disturbance may be influenced by the size of the second gap between the third electrode and the opposite edge of the second electrode.

When the touch tool is not sufficiently close to the first electrode (or the second electrode), a predetermined electrostatic capacity is ideally formed between the first electrode (or the second electrode) and the touch tool . Alternatively, if the touch tool approaches the first electrode (or the second electrode), some or all of the first fringing capacitance may be removed by the touch tool. In this case, the capacitance of the first electrode measured by the sensing circuit connected to the first electrode (or the second electrode) may decrease.

For example, an event in which touch input is performed on a specific second type node among the unit structures may be denoted as TIk. When the event TIk occurs, the change amount? C1, k of the capacitance value measured by the sensing circuit connected to the first electrode (compared with the case where no touch input is made at all) (I.e., the mutual ratio of capacitance change values) of the change amount? C2, k of the capacitance value measured by the sensing circuit connected to the second electrode is determined.

The value of? C1, k can be measured using the sensing circuit connected to the first electrode, and the value of? C2, k can be measured using the sensing circuit connected to the second electrode. By using the ratio of measured? C1, k and? C2, k, the second type node having the touch input can be identified, and the y coordinate value of the touch input can be calculated using the second type node.

The mutual switching of the operation modes according to the embodiment of the present invention may be operated in the first operation mode when the first condition is satisfied, and in the second operation mode otherwise.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the essential characteristics thereof. The contents of each claim in the claims may be combined with other claims without departing from the scope of the claims.

Claims (9)

A first electrode extending in a first direction; A second electrode adjacent to the first electrode and extending in the first direction; And a third electrode disposed between the first electrode and the second electrode and extending in the first direction, the touch panel comprising:
The third electrode is formed with at least one first branch penetrating toward the first electrode and at least one second branch penetrating toward the second electrode,
When the unit structure is divided into a plurality of nodes along the first direction,
A firing capacitance value formed between the third electrode and the first electrode included in the first node among the plurality of nodes and a fringing capacitance value formed between the third electrode and the second electrode, And a fringing capacitance value formed between the third electrode and the second electrode and between the third electrode and the first electrode included in the second node among the plurality of nodes and a fringing capacitance value formed between the third electrode and the second electrode. 2 ratio, the shape of the first branch and the second branch is formed,
Touch panel. The touch panel according to claim 1, wherein the first electrode, the second electrode, and the third electrode are formed on the same layer so as to be insulated from each other. The method according to claim 1, wherein a first ratio between an area of the first electrode included in the first node and an area of the second electrode is larger than an area of the first electrode included in the second node, The second ratio between the areas of the touch panel. The method according to claim 1,
Wherein the first electrode is formed in a stepped shape in which a portion of the first electrode facing the second electrode is bent toward each of the nodes,
The second electrode is formed in a stepped shape in which a portion of the second electrode facing the first electrode is bent to the boundary of each node,
Wherein a portion of the third electrode facing the first electrode and a portion of the third electrode facing the second electrode have a stepped shape corresponding to the shape of the first electrode and the second electrode,
Touch panel. 5. The method of claim 4, wherein, at each node,
The first branch and the second branch are formed on the third electrode so as to extend linearly in a direction perpendicular to the first direction,
Wherein the first electrode is formed so as to surround the first branch in correspondence with the shape of the first branch,
Wherein the second electrode is formed to surround the second branch corresponding to the shape of the second branch,
Touch panel. The touch panel according to claim 1, wherein, for two different nodes, the gap between the first electrode and the edge portion facing the third electrode is different from each other. The touch panel according to claim 1, wherein, for two different nodes, the first electrode and the third electrode have different extending distances from each other. A touch panel according to any one of claims 1 to 7; And
A sensing unit including one or more sensing circuits
/ RTI &gt;
In the first mode of operation, either one of the first electrode and the third electrode is floating or connected to a potential having a certain constant value so that no current flows through the one electrode ,
And in the second mode of operation, the one of the electrodes is adapted to be supplied with a current which varies with time,
Touch sensing device. A touch panel according to any one of claims 1 to 7; And
A sensing unit including one or more sensing circuits
/ RTI &gt;
In the first mode of operation, the third electrode is either floating or connected to a potential having a certain constant value such that no current flows through the third electrode,
In the second mode of operation, the third electrode is adapted to receive a current that varies with time,
A first change value of a capacitance of the first electrode detected by a sense circuit connected to the first electrode among the one or more sense circuits and a first change value of a capacitance of the one or more sense circuits detected by a sense circuit connected to the second electrode Wherein the touch input is adapted to determine at which position on the extension of the first direction the touch input is made, based on a ratio between the first change value of the capacitance of the first electrode and the second change value of the capacitance of the second electrode.
Touch sensing device.
KR1020150079768A 2015-06-05 2015-06-05 Touch input device supporting two types of input mode KR101637922B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100032283A (en) * 2009-04-20 2010-03-25 남동식 One-layer touch panel sensor
KR101553963B1 (en) * 2014-12-22 2015-09-17 (주)세미센스 Touch screen apparatus of mutual capacitance type of one layer structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100032283A (en) * 2009-04-20 2010-03-25 남동식 One-layer touch panel sensor
KR101553963B1 (en) * 2014-12-22 2015-09-17 (주)세미센스 Touch screen apparatus of mutual capacitance type of one layer structure

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