KR101717424B1 - Method for scan of a interlace type of a capacitance touch sensors - Google Patents

Method for scan of a interlace type of a capacitance touch sensors Download PDF

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Publication number
KR101717424B1
KR101717424B1 KR1020150079344A KR20150079344A KR101717424B1 KR 101717424 B1 KR101717424 B1 KR 101717424B1 KR 1020150079344 A KR1020150079344 A KR 1020150079344A KR 20150079344 A KR20150079344 A KR 20150079344A KR 101717424 B1 KR101717424 B1 KR 101717424B1
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South Korea
Prior art keywords
scan
touch
scanning
electrodes
group
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KR1020150079344A
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Korean (ko)
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KR20160143943A (en
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이영호
문덕주
안호필
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(주)이미지스테크놀로지
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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

Abstract

More particularly, the present invention relates to a scanning method of an interlaced scanning method in a capacitive touch sensor, which comprises the steps of (1) forming scan electrodes (Tx) and sensing electrodes (Rx) The Tx driving unit of the panel driving unit performs a scanning operation on the scan electrodes Tx in an interlaced manner when there is no touch generated in the touch sensor forming the plurality of nodes Nos. And (2) when a touch occurs during the scan in the interlaced manner, the Tx driving unit of the panel driving unit performs a local scan in which the scan is performed around the touch electrodes Tx As a feature of the configuration.
According to the scanning method of the interlace method in the capacitive touch sensor proposed in the present invention, when the touch is not present, the scanning is performed in the interlace manner, and when the touch is generated, the local scanning or the full scanning is performed, In the panel device, it is possible to perform an effective scan in a touch-free standby state, reduce the scan time compared to the entire Tx drive, reduce the standby current, and allow the scan process to be performed in a lossless manner .
In addition, according to the present invention, the scan time and the standby current can be effectively reduced even in the touch state through the local scan method after the occurrence of the touch, thereby enabling the conventional touch screen panel device to perform full scan It is possible to solve the problem of the conventional scanning method in which the scan time is increased and the consumed current is increased by unnecessary scanning even in the state of FIG.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a capacitive touch sensor,

[0001] The present invention relates to a scanning method in a capacitive touch sensor, and more particularly, to a scanning method in a capacitive touch sensor, in which full scanning is performed irrespective of whether a touch is present, The present invention relates to a scanning method of an interlaced type in a capacitive touch sensor.

Most of the smart devices that have become popular in recent years are equipped with touch panels, and most of the input / output is performed by touch. The method of recognizing the touch on the touch panel can be roughly divided into the resistance film type and the capacitance type. In the past, the resistance film method has been widely used because it is inexpensive in terms of economy. However, recently, it has been replaced with a capacitive method which is excellent in durability, has a clear screen, and is capable of multi-touch.

The capacitance type touch panel is a method of using the capacitance in the human body. The capacitance type touch panel is divided into the method of recognizing the touch by measuring the change of the resistance and the current caused by the capacitance of the person using the AC voltage and the method of judging the presence or absence of the touch by comparing the charged amount of the capacitor . Such a capacitive touch panel has excellent durability as compared with a resistive film type using a film, so that it does not interfere with moisture or small damage. In addition, the accuracy of the touch is relatively high, the optical characteristic is excellent, and the screen is clear. In particular, the touch panel using the charging method of the electrostatic capacity is widely used in a mobile smart device because it can be multipointed and can be manufactured in a small size.

FIG. 1 is a diagram illustrating a configuration of a conventional scanning method using a capacitive touch sensor. 1, a conventional capacitive touch screen panel 100 includes a plurality of scan electrodes 111 and a plurality of scan electrodes 111 for forming a plurality of nodes 113 intersecting with the plurality of scan electrodes 111. [ A Tx driver 121 for applying a scan signal to the scan electrodes 111 of the touch sensor 110 and a touch sensor 110 for applying a scan signal to the touch electrodes 110. The touch sensor 110 includes a plurality of sensing electrodes 112, And a panel driver 120 including an Rx driver 122 for sensing capacitance generated in the node 113 through the sensing electrode 112 of the sensor 110. [ In the conventional scan method of the touch screen panel 100, the Tx driving method of the capacitive touch sensor 110 is a method of driving the Tx driving unit 121 from the 0th (Tx-0) Tx Drive to the Nth Tx drive And sequentially receives data (Data) from the Rx driver 122 in accordance with each Tx number. At this time, a full scan (Tx-0 to Tx-N) is performed irrespective of the presence or absence of a touch, so that unnecessary scanning is performed even in the absence of a touch, resulting in an increase in consumed current with an increase in scan time. That is, in the conventional scanning method, the full scan method is applied irrespective of the presence or absence of a touch, thereby increasing the consumption current and the scan time as the number of Tx drives increases.

The present invention has been proposed in order to solve the above-mentioned problems of the previously proposed methods. In the case where there is no touch, scanning is performed in an interlaced manner, and local scanning or full scanning is performed when a touch occurs, In touch screen panel device, it is effective to scan in touch-free state, to reduce scan time compared to the entire Tx drive, to reduce the standby current, and to allow the lossless scan process And an object of the present invention is to provide an interlace scanning method in a capacitive touch sensor.

In addition, the present invention can effectively reduce the scan time and the standby current even in the touch state through the local scan method after the occurrence of the touch, thereby allowing the conventional touch screen panel device to perform the full scan regardless of the presence or absence of the touch, Another object of the present invention is to provide an interlaced scanning method in a capacitive touch sensor that can solve the problem of the conventional scanning method in which unnecessary scanning is performed to increase the scanning time and increase the consumed current.

According to an aspect of the present invention, there is provided an interlaced scanning method in a capacitive touch sensor,

As an interlace scanning method in a capacitive touch sensor,

(1) For a touch sensor that forms a plurality of nodes formed by the scan electrode Tx and the sense electrode Rx, if there is no touch generation, the Tx driver of the panel driver applies a voltage to the scan electrode Tx, The method comprising the steps of: And

(2) When a touch occurs during a scan in an interlaced manner, the Tx driving unit of the panel driving unit performs a local scan in which the scan is performed around the touch electrode Tx with respect to the touch electrode Tx And the like.

Preferably, in the step (1)

In order to apply the interlace scan method to the scan electrodes Tx-0 to Tx-N,

The group 1 and the group 2 may be an odd number or an even number, or the group of N consecutive electrodes may be grouped and sequentially applied alternately.

More preferably, in the step (1)

If group 1 and group 2 are defined as odd or even,

An even electrode scanning process for scanning the scan electrodes Tx-0 to Tx-N in the order of the scan electrodes Tx-0, Tx-2, Tx-4 to Tx-N,

The scan is performed in the order of the scan electrodes Tx-1, Tx-3, and Tx- (N-1) for the scan electrodes Tx-0 to Tx- .

Even more preferably, in the step (1)

An even electrode scanning process for scanning the scan electrodes Tx-0 to Tx-N in the order of the scan electrodes Tx-0, Tx-2, Tx-4 to Tx-N,

The electrode odd scan process of scanning the scan electrodes Tx-1 to Tx- (N-1) in the order of the scan electrodes Tx-1 to Tx- .

More preferably, in the step (1)

If the group 1 and the group 2 are defined such that consecutive N electrodes are grouped and sequentially applied alternately,

A group 1 scan process for scanning the scan electrodes Tx-0 to Tx-N in the order of a group of scan electrodes Tx-0 to Tx-2, Tx-6 to Tx-8,

The scan may be performed in any one of the group 2 scan processes in which the scan electrodes are scanned in the order of the scan electrodes Tx-3 to Tx-5, Tx-9 to Tx-11,.

Even more preferably, in the step (1)

A group 1 scan process for scanning the scan electrodes Tx-0 to Tx-N in the order of a group of scan electrodes Tx-0 to Tx-2, Tx-6 to Tx-8,

The group 2 scan process of scanning the scan electrodes in the order of the scan electrodes Tx-3 to Tx-5, Tx-9 to Tx-11, ... may be repeatedly performed.

Preferably, in the step (2)

And a full scan process in which the scan is performed in the order of Tx-0 to Tx-N instead of the local scan.

More preferably, in the step (2)

The method may further include a step of scanning the Tx driver of the panel driving unit in an interlaced manner when the touch generated by the touch sensor disappears.

According to the scanning method of the interlace method in the capacitive touch sensor proposed in the present invention, when the touch is not present, the scanning is performed in the interlace manner, and when the touch is generated, the local scanning or the full scanning is performed, In the panel device, it is possible to perform an effective scan in a touch-free standby state, reduce the scan time compared to the entire Tx drive, reduce the standby current, and allow the scan process to be performed in a lossless manner .

In addition, according to the present invention, the scan time and the standby current can be effectively reduced even in the touch state through the local scan method after the occurrence of the touch, thereby enabling the conventional touch screen panel device to perform full scan It is possible to solve the problem of the conventional scanning method in which the scan time is increased and the consumed current is increased by unnecessary scanning even in the state of FIG.

1 is a view showing a configuration of a scanning method using a conventional capacitive touch sensor.
2 is a flow chart illustrating a scanning method of an interlace method in a capacitive touch sensor according to an exemplary embodiment of the present invention.
3 is a diagram illustrating an example of a scan configuration before touch detection in a scanning method of an interlace method in a capacitive touch sensor according to an embodiment of the present invention.
4 is a diagram illustrating another example of the scan configuration before touch detection in the interlace scanning method in the capacitive touch sensor according to the embodiment of the present invention.
5 is a diagram illustrating a configuration of a touch sensing scan method in an interlace scanning method in a capacitive touch sensor according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals are used throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 2 is a diagram illustrating a flow of an interlaced scanning method in a capacitive touch sensor according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a scanning method of an interlaced method in a capacitive touch sensor according to an embodiment of the present invention. FIG. 4 illustrates another example of the scan configuration before touch detection in the interlace scanning method in the capacitive touch sensor according to the embodiment of the present invention. FIG. FIG. 5 is a diagram illustrating a configuration of a touch sensing scan method in an interlace scanning method in a capacitive touch sensor according to an exemplary embodiment of the present invention. Referring to FIG. As shown in FIG. 2, in the capacitive touch sensor according to an embodiment of the present invention, an interlace scanning method includes a step S110 of performing an interlace scanning when there is no touch generation (S110) And a step of performing a local scan (S120) in which a scan is performed around the touch when a touch occurs during a scan. In a case where a touch occurs during an interlace scan, (Step S130). [0033] FIG.

3 to 5, a touch screen panel 100 to which an interlaced scanning method is applied in a capacitive touch sensor according to an embodiment of the present invention includes a plurality of scan electrodes 111, And a plurality of sensing electrodes 112 for forming a plurality of nodes 113 intersecting with the scan electrodes 111 of the touch sensor 110. The touch sensor 110 performs a touch sensing function, A Tx driver 121 for applying a scan signal to the scan electrode 111 of the touch sensor 110 and an Rx driver 122 for sensing a capacitance generated at the node 113 through the sense electrode 112 of the touch sensor 110 And a panel driving unit 120 including the panel driving unit 120. Since the touch screen panel 100 corresponds to a structure generally implemented in a capacitive touch panel, a detailed description of the unnecessary components will be omitted. Hereinafter, an interlace scanning method in a capacitive touch sensor to which the structure of the touch screen panel 100 is applied will be described in detail in stages.

In step S110, the touch sensor 110 forming the plurality of nodes 113 formed by the scan electrode (Tx) 111 and the sense electrode (Rx) The Tx driver 121 of the panel driver 120 may scan the scan electrodes Tx 111 in an interlaced manner. In this step S110, unlike the conventional full scan method shown in FIG. 1, for effective application of the touch scan, the scan electrodes 111 (Tx-0 to Tx-N) And group 2, and group 1 and group 2 are grouped into odd-numbered or even-numbered groups, or consecutive N electrodes are grouped so as to be sequentially alternately applied, and the scanning is performed in an interlaced manner. 3, the scan electrode 111 (Tx-0 to Tx-N) may be connected to the scan electrode 111 and the scan electrode 111 in the case where the group 1 and the group 2 are defined as an odd number or an even number, (Tx-0 to Tx-N) in the order of scan electrodes (Tx-0, Tx-2, Tx-4 to Tx-N) As shown in the figure, the scan may be performed in any one of the electrode odd scan processes in which the scan electrodes 111 (Tx-1, Tx-3, and Tx- (N-1)) are sequentially scanned.

In step S110, scan electrodes 111 (Tx-0, Tx-2, Tx-4, and Tx-N) are sequentially scanned with respect to the scan electrodes 111 (Tx-1, Tx-3, and Tx- (N-1)) with respect to the scan electrodes 111 (Tx-0 to Tx-N) And the electrode odd scan process may be repeatedly performed. In step S110, if there is no touch on the touch sensor 110, the even electrode scanning process and the electrode odd scanning process are repeated to effectively detect the touch, or the electrode odd scanning process or the electrode odd scanning process is performed , It is possible to reduce the increase of the scan time and the increase of the consumed current due to unnecessary scanning in the absence of a touch.

On the other hand, if it is defined in step S110 that group 1 and group 2 are sequentially applied with N consecutive electrodes grouped, the scan electrodes 111 (Tx-0 to Tx-N) (Tx-3 to Tx-5, Tx-8, ...) in the order of grouping the scan electrodes 111 (Tx-0 to Tx-2, Tx-6 to Tx- -9 to Tx-11, ...) in the order of group scanning. The scan electrodes 111 (Tx-0 to Tx-N) are scanned in the order of the scan electrodes 111 (Tx-0 to Tx-2, Tx-6 to Tx-8, The group 1 scan process and the group 2 scan process of scanning the scan electrodes 111 in the order of the group of the scan electrodes 111 (Tx-3 to Tx-5, Tx-9 to Tx-11, have.

That is, in step S110, it is possible to group the plurality of electrodes based on the definition of an odd number or an even number in an interlaced scan method, and to configure interlacing between the grouped electrodes. As an example of defining a plurality of electrodes as grouping, three consecutive electrodes may be grouped and sequentially applied to group 1 and group 2 alternately. In the present invention, three consecutive electrodes are grouped into groups. However, the present invention is not limited thereto, and it can be understood that a plurality of electrodes can be set as a group. That is, the interlace scan of the present invention can be understood to be applied to and used by the interlace scan method in various ways as defined by the designer, in terms of odd and even numbers and definition of a group for interlacing.

In step S120, when a touch occurs during the scan in the interlaced manner, the Tx driver 121 of the panel driver 120 applies a local scan (Scan) to the scan electrodes (Tx) ). In step S120, when the touch generated by the touch sensor 110 disappears, the Tx driver 121 of the panel driver 120 is changed to the interlace mode so that the user can return to the scanning process of step S110.

In step S130, a full scan process may be performed in the order of Tx-0 to Tx-N instead of the local scan in step S120. If the touch generated by the touch sensor 110 disappears, the Tx driver 121 of the panel driver 120 is changed to the interlaced mode in step S130 so that the process returns to step S110. To be able to go.

5 is a diagram illustrating a configuration of a scan method in case of touch sensing in the interlace scanning method in the capacitive touch sensor according to the embodiment of the present invention. 5 shows a case in which the scan electrodes 111 are touched at Tx-2 / Tx-4 during an interlace scan in an even electrode scanning process in a state where there is no touch generation, and FIG. Indicates a case where the scan method is changed to the full scan method for accurate coordinates according to the touch detection of Tx-2 / Tx-4. That is, in steps S120 and S130, the scan method is used after the touch is detected, the full scan method is used, or +/- n scan electrodes Tx are scanned before and after the Tx of the area where the touch is detected Method can be used. When there is no touch generated thereafter, it is changed to the interlace method again, and the scanning process of step S110 is performed.

As described above, according to the scanning method of the interlaced method in the capacitive touch sensor according to the embodiment of the present invention, interlaced scanning and local scanning can be performed according to the presence or absence of touch in the touch sensor without changing the structural configuration of the touch screen panel. Scan or full scan method can be applied. Thus, it is possible to effectively scan in a touch-free touch standby state in the touch screen panel device, reduce the scan time compared to the entire Tx drive, reduce the standby current, The scanning process can be performed without loss in comparison with the scanning method. In addition, the scan time and the standby current can be effectively reduced even in the touch state through the local scan method after the touch is generated.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics of the invention.

100: touch screen panel (TSP) 110: touch sensor
111: scan electrode (Tx) 112: sensing electrode (Rx)
113: node 120: panel driver
121: Tx driver 122: Rx driver
S110: the step of performing the scanning in the interlace method when there is no touch occurrence
S120: a step of performing a local scan in which a scan is performed around the touch when a touch occurs during scanning in an interlaced manner
S130: a step of performing a full scan when a touch occurs during scanning in an interlaced manner

Claims (8)

As an interlace scanning method in a capacitive touch sensor,
(1) For a touch sensor 110 forming a plurality of nodes 113 formed by the scan electrode (Tx) 111 and the sense electrode (Rx) 112, if no touch occurs, The Tx driving unit 121 of the panel driving unit 120 scans the scan electrodes Tx 111 in an interlaced manner; And
(2) In a case where a touch occurs during a scan in an interlaced manner, the Tx driving unit 121 of the panel driving unit 120 performs a local scan (local scan) in which the scan is performed around the touch electrode (Tx) Scan, < / RTI >
In the above step (1)
For the application of the interlace scan method to the scan electrodes 111 (Tx-0 to Tx-N), groups 1 and 2 are divided into groups 1 and 2. The groups 1 and 2 are odd or even, N electrodes are grouped and sequentially applied to alternate electrodes,
In the above step (1)
The scan electrodes 111 (Tx-0 to Tx-N) are connected to the scan electrodes 111 (Tx-0 to Tx-N) when the group 1 and the group 2 are defined such that consecutive N electrodes are grouped and sequentially applied alternately. (Tx-3 to Tx-5 to Tx-9 to Tx-6 to Tx-8 to Tx-0 to Tx-2 to Tx- Tx-1,..., Tx-2,..., Tx-11, ... are grouped into a scan group, (Tx-3 to Tx-5 to Tx-8, ...) in the order of the group of scan electrodes (Tx-0 to Tx-2, Tx-6 to Tx- To Tx-11,...) In the order of group. The scanning method according to claim 1, wherein the group 2 scanning process is repeatedly performed.
delete 2. The method according to claim 1, wherein in the step (1)
If group 1 and group 2 are defined as odd or even,
Scan electrodes 111 (Tx-0, Tx-2, Tx-4, and Tx-N) are sequentially scanned with respect to the scan electrodes 111 (Tx-0 to Tx- Process,
The scan electrodes 111 (Tx-1 to Tx-3) to Tx- (N-1) are sequentially scanned with respect to the scan electrodes 111 (Tx-0 to Tx- Wherein the scan is performed in any one of the following steps:
4. The method according to claim 3, wherein in the step (1)
Scan electrodes 111 (Tx-0, Tx-2, Tx-4, and Tx-N) are sequentially scanned with respect to the scan electrodes 111 (Tx-0 to Tx- Process,
The scan electrodes 111 (Tx-1 to Tx-3) to Tx- (N-1) are sequentially scanned with respect to the scan electrodes 111 (Tx-0 to Tx- So that the scan is repeatedly performed in the capacitive touch sensor.
delete delete The method according to any one of claims 1, 3, and 4, wherein in the step (2)
And performing a full scan in the order of Tx-0 to Tx-N in place of the local scan.
8. The method according to claim 7, wherein in the step (2)
Further comprising the step of scanning the Tx driver 121 of the panel driver 120 in an interlaced manner when the touch generated by the touch sensor 110 is lost. Method of scanning.
KR1020150079344A 2015-06-04 2015-06-04 Method for scan of a interlace type of a capacitance touch sensors KR101717424B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190000471A (en) 2017-06-23 2019-01-03 경희대학교 산학협력단 Touch detecting apparatus for operating selective low-power mode and method thereof

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KR101898979B1 (en) * 2012-02-16 2018-09-17 삼성디스플레이 주식회사 Method of operating a touch panel, touch panel and display device
KR20140073827A (en) * 2012-12-07 2014-06-17 엘지디스플레이 주식회사 Touch sensing system and driving method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190000471A (en) 2017-06-23 2019-01-03 경희대학교 산학협력단 Touch detecting apparatus for operating selective low-power mode and method thereof

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