CN109164938B - Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen - Google Patents

Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen Download PDF

Info

Publication number
CN109164938B
CN109164938B CN201811072710.XA CN201811072710A CN109164938B CN 109164938 B CN109164938 B CN 109164938B CN 201811072710 A CN201811072710 A CN 201811072710A CN 109164938 B CN109164938 B CN 109164938B
Authority
CN
China
Prior art keywords
finger
displacement
screen
coordinate
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811072710.XA
Other languages
Chinese (zh)
Other versions
CN109164938A (en
Inventor
梁晨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201811072710.XA priority Critical patent/CN109164938B/en
Priority to CN202210145278.2A priority patent/CN114546166A/en
Publication of CN109164938A publication Critical patent/CN109164938A/en
Application granted granted Critical
Publication of CN109164938B publication Critical patent/CN109164938B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186—Touch location disambiguation
    • 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

Landscapes

  • 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)
  • User Interface Of Digital Computer (AREA)

Abstract

The invention relates to the technical field of capacitive touch screen positioning, in particular to a method for avoiding micro-displacement misoperation of a dragging action of a capacitive touch screen, which comprises the following steps: (A1) monitoring the contact area and the contact position of a finger with a screen; (B1) if the contact area is gradually increased and the area increase rate is greater than a set threshold value a, outputting the contact position of the finger as effective displacement; (C1) if the change rate of the contact area is less than or equal to a set threshold value a, outputting the contact position of the finger as effective displacement; (D1) and if the contact area is gradually reduced and the area reduction rate is greater than a set threshold value a, rejecting the contact position of the finger as invalid displacement. The contact area of the finger and the screen is monitored, so that the state of the finger and the screen can be judged, namely the moment when the finger leaves the screen is found out, and then the coordinate in the moment is taken as an invalid coordinate to be removed, so that the micro-displacement phenomenon is avoided, and the accuracy in touch control is ensured.

Description

Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen
Technical Field
The invention relates to the technical field of capacitive touch screen positioning, in particular to a method for avoiding micro-displacement misoperation of a dragging action of a capacitive touch screen.
Background
The capacitive touch screen technology works by using current induction of a human body. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are respectively coated with one layer of ITO, the outermost layer is a thin-layer silica glass protective layer, the interlayer ITO coating serves as a working surface, four electrodes are led out from four corners, and the inner layer of ITO serves as a shielding layer to guarantee a good working environment. When a finger touches the metal layer, a coupling capacitance is formed between the user and the touch screen surface due to the electric field of the human body, and for high frequency currents, the capacitance is a direct conductor, so that the finger draws a small current from the contact point. The currents respectively flow out of the electrodes on the four corners of the touch screen, the currents flowing through the four electrodes are in direct proportion to the distances from the fingers to the four corners, and the controller obtains the position of a touch point through accurate calculation of the proportion of the four currents. The capacitive touch screen is a latest input device, is the simplest, convenient and natural man-machine interaction mode at present, gives a brand-new appearance to multimedia, and is a brand-new multimedia interaction device with great attraction.
When operating on a device with a capacitive touch screen, such as a mobile phone or a tablet computer, a dragging micro-displacement phenomenon often occurs, for example: when the grenade is picked up and pulled away to be thrown to a position aimed in advance during a game, when the grenade is moved to the aimed position and then the fingers are loosened, small displacement is generated, and the grenade is thrown askew; when the drawing is repaired, a smearing tool is selected, and a region needing to be smeared is smeared by fingers, when the edge of the region is smeared by loose hands, the slight displacement is generated, and a little more smearing is always easy; when a video is edited, when a user pushes or pulls the time axis to a designated position and then releases his hand, a minute displacement is generated, and the time axis which is originally positioned is moved. Due to the existence of the dragging micro-displacement phenomenon, much inconvenience is brought to use, and therefore, how to eliminate the micro-displacement phenomenon is very important.
Disclosure of Invention
The invention aims to provide a method for avoiding micro-displacement misoperation of a dragging action of a capacitive touch screen, and improve the accuracy of touch control.
In order to achieve the above purpose, the first technical scheme adopted by the invention is as follows: a method for avoiding micro-displacement misoperation of a dragging action of a capacitive touch screen comprises the following steps: (A1) monitoring the contact area and the contact position of a finger with a screen; (B1) if the contact area is gradually increased and the area increase rate is greater than a set threshold value a, outputting the contact position of the finger as effective displacement; (C1) if the change rate of the contact area is less than or equal to a set threshold value a, outputting the contact position of the finger as effective displacement; (D1) and if the contact area is gradually reduced and the area reduction rate is greater than a set threshold value a, rejecting the contact position of the finger as invalid displacement.
Compared with the prior art, the scheme has the following technical effects: the contact area of the finger and the screen is monitored, so that the state of the finger and the screen can be judged, namely the moment when the finger leaves the screen is found out, and then the coordinate in the moment is taken as an invalid coordinate to be removed, so that the micro-displacement phenomenon is avoided, and the accuracy in touch control is ensured.
In order to achieve the above purpose, the second technical scheme adopted by the invention is as follows: the method for avoiding the misoperation of the dragging micro-displacement of the capacitive touch screen comprises a controller and a processing unit, wherein the controller calculates the contact position of a finger and a screen according to currents flowing out of four corner electrodes of the touch screen and outputs the contact position to the processing unit, and the processing unit carries out calibration processing according to the following steps: (A2) judging the current coordinate (x)n,yn) If the current coordinate is valid, outputting the current coordinate; if the coordinate is an invalid coordinate, executing the next step; (B2) judging the previous coordinate (x)n-1,yn-1) If it is valid, calibrating the coordinate (x) if it is validn-m,yn-m) Outputting as the current coordinate, wherein m is a set calibration value; and if the coordinates are invalid, outputting the invalid coordinates.
Compared with the prior art, the scheme has the following technical effects: by monitoring the coordinates, when the invalid coordinates are output for the first time, the moment is the moment when the finger leaves the screen, and the invalid coordinates are calibrated to be coordinate values when the finger stops at the moment, so that the coordinate offset caused by a micro-displacement phenomenon is avoided, and the accuracy of the final touch position is ensured.
Drawings
FIG. 1 is a plan view of a finger pointing down the screen and dragging to a loose hand.
Detailed Description
The present invention is described in further detail below with reference to fig. 1.
Fig. 1 is a plan projection view of a finger clicking a screen and dragging the finger to a loose hand, and it can be clearly seen from the figure that when the finger clicks the screen, the contact area between the finger and the screen gradually increases, when the finger drags on the screen, the contact area between the finger and the screen is basically constant, the position at which the finger stops is generally the last position that the user wants to determine, and the position is accurate, when the finger leaves the screen, the contact area between the finger and the screen gradually decreases, and a micro-displacement occurs in the process that the finger leaves the screen, so that the final position at which the finger completely leaves the screen and the position at which the finger stops are shifted, and the final positioning is not accurate enough.
In order to eliminate micro-displacement, the invention provides a method for avoiding micro-displacement misoperation of a capacitive touch screen dragging action, which comprises the following steps: (A1) monitoring the contact area and the contact position of a finger with a screen; (B1) if the contact area is gradually increased and the area increase rate is greater than a set threshold value a, outputting the contact position of the finger as effective displacement; (C1) if the change rate of the contact area is less than or equal to a set threshold value a, outputting the contact position of the finger as effective displacement; (D1) and if the contact area is gradually reduced and the area reduction rate is greater than a set threshold value a, rejecting the contact position of the finger as invalid displacement. The threshold value a is the maximum value of the area change rate when the finger is normally in contact with the screen. The micro displacement can be identified and abandoned by monitoring the contact area of the finger and the screen and judging the change of the area, and in the step B1, if the contact area is gradually increased and the area increasing rate is greater than a set threshold value a, namely when the finger clicks the screen, the contact position at the moment is effective displacement; in step C1, if the change rate of the contact area is less than or equal to the set threshold a, that is, when the finger is dragging on the screen, theoretically, the area of the screen pressed by the finger is fixed during dragging, but actually, due to the existence of factors such as monitoring errors and finger shaking, the contact area still changes continuously, but the change rate is very small, and the contact position during dragging is also effective displacement; in step D1, if the contact area is gradually decreased and the area decrease rate is greater than the set threshold a, this indicates that the process from the moment when the finger stops to the moment when the finger completely leaves the screen, and the contact position in the process is taken as an invalid position to be removed, so that the micro-displacement phenomenon can be eliminated.
The invention also provides another method for avoiding the micro-displacement misoperation of the dragging action of the capacitive touch screen, which comprises a controller and a processing unit, wherein the controller calculates the contact position of a finger and a screen according to the current flowing out of the electrodes at the four corners of the touch screen and outputs the contact position to the processing unit, and the processing unit carries out calibration processing according to the following steps: (A2) judging the current coordinate (x)n,yn) If the current coordinate is valid, outputting the current coordinate; if the coordinate is an invalid coordinate, executing the next step; (B2) judging the previous coordinate (x)n-1,yn-1) If it is valid, calibrating the coordinate (x) if it is validn-m,yn-m) Outputting as the current coordinate, wherein m is a set calibration value; and if the coordinates are invalid, outputting the invalid coordinates. In the step A2 and the step B2, the finger is connected with the screenThe output of the controller is the effective coordinate when the finger is not in contact with the screen, and the output of the controller is the ineffective coordinate when the finger is not in contact with the screen. In the previous scheme, invalid displacements are eliminated by monitoring the contact area, but the scheme is different, and errors caused by micro-displacement are eliminated by correcting after each displacement.
In order to ensure the accuracy of the corrected coordinates, m is [ t1/t2], wherein t1 is the time difference between the moment when the finger stops and the moment when the finger completely leaves the screen, t2 is the coordinate output period of the controller, and [ t1/t2] is the rounding operation of the result of t1/t 2. Thus, it is ensured that the corrected coordinates are the coordinates at the moment when the finger stops. The correction process is explained below by means of a detailed example.
Assuming that the user presses the capacitive screen by a finger, the controller calculates the coordinates of the user pressing as { (5,5), (5,6), (5,7), (6,7), …, (45,74), (45,75), (45,76), (45,77), (-1, -1), (-1, -1), … }, where the first omitted point is a valid coordinate and the second omitted point is an invalid coordinate, and for convenience of description, all the invalid coordinates are replaced by (-1, -1), and all the valid coordinates are actual coordinate positions. In the prior art, the coordinates calculated by the controller are the output coordinates, which are then calibrated by steps a2 and B2.
In calibration, { (5,5), (5,6), (5,7), (6,7), …, (45,74), (45,75), (45,76), (45,77) } these coordinates remain the original coordinate output, and when the first (-1, -1) is judged, it is an invalid coordinate, and when the coordinate (45,77) before the first (-1, -1) is judged to be an valid coordinate, and if m takes 4, the coordinate (45,74) is output instead of (-1, -1), and when the second and the following other (-1, -1) are judged, it is still unchanged, and the invalid coordinate (-1, -1) is continuously output, and therefore, the corrected coordinate is: { (5,5), (5,6), (5,7), (6,7), …, (45,74), (45,75), (45,76), (45,77), (45,74), (-1, -1), … }. When the finger stops, the coordinate of the finger is (45,74), although the micro-displacement phenomenon occurs in the process that the finger leaves the screen, namely the coordinate changes { (45,74), (45,75), (45,76), (45,77) }, after the finger leaves the screen finally, the first invalid coordinate after the finger leaves the screen is restored to the coordinate value (45,74) when the finger stops through correction, so that the error caused by the micro-displacement is eliminated, and the accuracy of finger touch is ensured.

Claims (2)

1. A method for avoiding micro-displacement misoperation of a dragging action of a capacitive touch screen is characterized by comprising the following steps of: the method comprises the following steps:
(A1) monitoring the contact area and the contact position of a finger with a screen;
(B1) if the contact area is gradually increased and the area increase rate is greater than a set threshold value a, outputting the contact position of the finger as effective displacement;
(C1) if the change rate of the contact area is less than or equal to a set threshold value a, outputting the contact position of the finger as effective displacement;
(D1) and if the contact area is gradually reduced and the area reduction rate is greater than a set threshold value a, rejecting the contact position of the finger as invalid displacement.
2. The method for avoiding the micro-displacement misoperation of the dragging action of the capacitive touch screen as claimed in claim 1, wherein: the threshold value a is the maximum value of the area change rate when the finger is normally in contact with the screen.
CN201811072710.XA 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen Active CN109164938B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201811072710.XA CN109164938B (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen
CN202210145278.2A CN114546166A (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811072710.XA CN109164938B (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CN202210145278.2A Division CN114546166A (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen

Publications (2)

Publication Number Publication Date
CN109164938A CN109164938A (en) 2019-01-08
CN109164938B true CN109164938B (en) 2022-03-25

Family

ID=64879363

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201811072710.XA Active CN109164938B (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen
CN202210145278.2A Pending CN114546166A (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202210145278.2A Pending CN114546166A (en) 2018-09-14 2018-09-14 Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen

Country Status (1)

Country Link
CN (2) CN109164938B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101763005A (en) * 2007-04-18 2010-06-30 京瓷美达株式会社 Operation device and image formation device
CN102799292B (en) * 2011-05-24 2016-03-30 联想(北京)有限公司 A kind of method of toch control, device and electronic equipment
CN106055187A (en) * 2015-04-02 2016-10-26 富士通株式会社 Control method and electronic device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086724A (en) * 1994-06-16 1996-01-12 Hitachi Ltd Method and device for correcting coordinates of indication position and presentation device with hand shake correcting function
US8902196B2 (en) * 2002-12-10 2014-12-02 Neonode Inc. Methods for determining a touch location on a touch screen
CN101364160A (en) * 2008-09-24 2009-02-11 广东威创视讯科技股份有限公司 Error correcting method for touch screen
CN101533326A (en) * 2008-10-15 2009-09-16 闻泰集团有限公司 Method for calibrating coordinates of resistance touch screen
JP2010204812A (en) * 2009-03-02 2010-09-16 Panasonic Corp Portable terminal equipment and input device
CN102111582B (en) * 2009-12-25 2015-06-17 康佳集团股份有限公司 Remote control device for television, television and remote control method
CN101963862A (en) * 2010-09-26 2011-02-02 苏州瀚瑞微电子有限公司 Coordinate anti-trembling method on touch screen
JP6126904B2 (en) * 2013-05-13 2017-05-10 株式会社Ｎｔｔドコモ Electronic device, locus correction method, program
CN106201304A (en) * 2016-06-23 2016-12-07 乐视控股（北京）有限公司 A kind of method and device of false-touch prevention operation
CN107102773A (en) * 2017-04-27 2017-08-29 努比亚技术有限公司 A kind of Touch-control error prevention method, terminal and computer-readable recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101763005A (en) * 2007-04-18 2010-06-30 京瓷美达株式会社 Operation device and image formation device
CN102799292B (en) * 2011-05-24 2016-03-30 联想(北京)有限公司 A kind of method of toch control, device and electronic equipment
CN106055187A (en) * 2015-04-02 2016-10-26 富士通株式会社 Control method and electronic device

Also Published As

Publication number Publication date
CN114546166A (en) 2022-05-27
CN109164938A (en) 2019-01-08

Similar Documents

Publication Publication Date Title
US9910541B2 (en) Mis-touch recognition method and device
US8749507B2 (en) Systems and methods for adaptive interpretation of input from a touch-sensitive input device
TWI400645B (en) Touch determining method and touch gesture determining method thereof
US8334850B2 (en) Multi-touch controlled apparatus and method thereof
US8405619B2 (en) Input method for touch screen
TW201322070A (en) Noise filtering method
CN103164067B (en) Judge the method and the electronic equipment that touch input
CN107765918B (en) Method and system for optimizing edge touch effect of capacitive touch screen
TWI592845B (en) Method and associated controller for adaptively adjusting touch-control threshold
WO2011026389A1 (en) Touch control method, processing apparatus and processing system
US20150212616A1 (en) Touch panel and touch detecting method therefor
CN109164938B (en) Method for avoiding micro-displacement misoperation of dragging action of capacitive touch screen
TWI474250B (en) Control circuit and dual touch method thereof for a four-wire register touch panel
TWI526906B (en) Signal processing method
CN109254672A (en) Control method of cursor and cursor control system
JP4098314B2 (en) Capacitive touch panel multiple article detection method
CN204423348U (en) A kind of Nano Silver OPS projection-type capacitive touch screen
CN103164092B (en) Touch point detection method
CN211454529U (en) Tactile feedback touch screen
JP6219708B2 (en) Touch detection device and touch detection method
CN107957804A (en) Three-dimensional touch device
TWI450172B (en) Floating compensation method of touch panel
US20190113999A1 (en) Touch motion tracking and reporting technique for slow touch movements
US10444899B2 (en) Multiple threshold motion tolerance to filter coordinate jitter in touch sensing
CN103870173A (en) Display method and electronic device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant