CN105786278B - A kind of mutual inductance type capacitive touch screen - Google Patents

A kind of mutual inductance type capacitive touch screen Download PDF

Info

Publication number
CN105786278B
CN105786278B CN201610078434.2A CN201610078434A CN105786278B CN 105786278 B CN105786278 B CN 105786278B CN 201610078434 A CN201610078434 A CN 201610078434A CN 105786278 B CN105786278 B CN 105786278B
Authority
CN
China
Prior art keywords
electrode
line
induction
touch screen
straight line
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
CN201610078434.2A
Other languages
Chinese (zh)
Other versions
CN105786278A (en
Inventor
黄忠守
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.)
Shanghai Tianma Microelectronics Co Ltd
Original Assignee
Shanghai Tianma Microelectronics Co Ltd
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 Shanghai Tianma Microelectronics Co Ltd filed Critical Shanghai Tianma Microelectronics Co Ltd
Priority to CN201610078434.2A priority Critical patent/CN105786278B/en
Priority claimed from CN201210533695.0A external-priority patent/CN103268176B/en
Publication of CN105786278A publication Critical patent/CN105786278A/en
Application granted granted Critical
Publication of CN105786278B publication Critical patent/CN105786278B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G06F3/044—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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

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)

Abstract

The invention discloses a kind of mutual inductance type capacitive touch screens, including driving line, the line of induction and electrode structure, the electrode structure includes first electrode and second electrode, the driving line connection of the first electrode and touch screen, the line of induction connection of the second electrode and touch screen；Alternatively, the line of induction of the first electrode and touch screen connects, the driving line of the second electrode and touch screen is connected；The electrode structure has isotropic detection feature.It is covered with the line of induction the invention has the following beneficial effects: the electrode by the cyclic annular curve of application or a plurality of straight line and drives the most areas between line, make electrode that there is isotropic detection feature, and the Inductance and Capacitance change curve between electrode is smooth, improves the sensitivity of detection touch signal and the resolution of acquired touch signal.

Description

A kind of mutual inductance type capacitive touch screen
The present patent application be the applying date be on December 11st, 2012, application No. is 201210533695.0, it is entitled A kind of divisional application of the patent application of " mutual inductance type capacitive touch screen ".
Technical field
The present invention relates to mutual inductance type capacitive touch screen more particularly to a kind of electrode structures of mutual inductance type capacitive touch screen.
Background technique
Capacitive touch screen can be divided into two class of self-induction condenser type and Inductance and Capacitance formula according to the mode of detecting touch signal. One mutual inductance type capacitive touch screen drives line and the plural line of induction directly handed over it to constitute by plural item, drives line and the line of induction Between form Inductance and Capacitance, driving the overlapping part capacitor between line and the line of induction is that can not be changed by extraneous touching object , the Inductance and Capacitance that the spatial edge electric field that non-electrode overlapping part generates is formed is then by the direct shadow of extraneous touching object It rings.
Fig. 1 is a kind of electrode structure of typical mutual inductance type capacitive touch screen in the prior art.Between two prismatic electrodes Space determine the size of Inductance and Capacitance C, while also determining the amplitude of peak signal.This is because finger is pressed in touch screen When surface, when finger indentation covers the gap area of some or all of Inductance and Capacitance, Inductance and Capacitance changes.The line of induction The signal of upper output is then directly proportional to the variable quantity of Inductance and Capacitance.
It is the shape of the gap area of the shape of finger indentation, finger moving direction and Inductance and Capacitance shown in Fig. 2, wherein Including finger moving direction D1 and finger moving direction D2.Finger on direction shown in D1 or D2 to move, so that Inductance and Capacitance C Different change curves is presented in the variation of (referring to Fig. 1).As shown in figure 3, according to mutual electrification caused by electrode structure shown in Fig. 1 Hold finger moving direction D1 and D2 shown in C and Fig. 2, the change curve L1 and change curve L2 of the Inductance and Capacitance C being calculated become Change curve L1 and change curve L2 and respectively correspond finger moving direction D1 and D2, K then indicates time or finger moving distance.We It is noted that the electrode structure of touch screen as shown in Figure 1 first results in anisotropic detection feature；Next Inductance and Capacitance Change curve is unsmooth.This will generate noise when doing the differential of time or space to output signal, to influence touching Touch the higher-spatial frequencies of signal and the resolution of temporal frequency.
Summary of the invention
The object of the present invention is to provide a kind of mutual inductance type capacitive touch screen, with solve in the prior art due to touch screen respectively to The change curve of anisotropic detection feature and Inductance and Capacitance is unsmooth, when causing to do output signal the differential in time or space Generate noise, thus influence touch signal higher-spatial frequencies and temporal frequency resolution the problem of.
The purpose of the present invention is what is be achieved through the following technical solutions:
Preferred embodiments of the present invention provide a kind of mutual inductance type capacitive touch screen, including driving line, the line of induction and electrode knot Structure, the electrode structure include first electrode and second electrode, and the driving line of the first electrode and touch screen connects, and described the The connection of the line of induction of two electrodes and touch screen；Alternatively, the line of induction of the first electrode and touch screen connects, the second electrode It is connect with the driving line of touch screen；The electrode structure has isotropic detection feature.
In preferred embodiment, the figure of the first electrode and the second electrode is inc cyclic annular curve, institute The cyclic annular curve of the cyclic annular curve and the second electrode of stating first electrode is wound by fixed spacing, the first electrode and drive Moving-wire connection, the second electrode are connect with the line of induction.
Preferably, the inc cyclic annular curve of the figure of the first electrode and the second electrode is helix, institute The cyclic annular curve for stating first electrode meets following formula:
Wherein, RDriveIt is half of a transfer point on the spiral center to the ring-type curve of the cyclic annular curve of the first electrode Diameter, R0For the ring-type curve starting point to the distance of spiral center, u is the speed that is displaced outwardly along radial direction of the transfer point Degree, ω are the angular speed that the transfer point surrounds spiral center rotation,For the ring-type through coordinate origin to the first electrode The angle of the transfer point is formed on curve straight line and X-axis.
Preferably, the cyclic annular curve of the second electrode meets following formula:
Wherein, RSenseIt is half of a transfer point on the spiral center to the ring-type curve of the cyclic annular curve of the second electrode Diameter,For the initial phase of the starting point of the cyclic annular curve of the starting point and first electrode of the cyclic annular curve of the second electrode Difference, DgapFor the spacing of the cyclic annular curve of the cyclic annular curve and second electrode of the first electrode.
Preferably, the space D of the cyclic annular curve of the cyclic annular curve and second electrode of the first electrodegapMeet such as Lower formula:
Dgap≥0.5·(WD+WS)+DLith,
Wherein, WDFor the line width of the cyclic annular curve of the first electrode, WSFor the line of the cyclic annular curve of the second electrode Width, DLithThe minimum spacing between the cyclic annular curve of second electrode described in cyclic annular Qu Huanyu is told for the first electrode of setting.
Preferably, the cyclic annular curve of the first electrode further includes one section of helix, and with the second electrode Cyclic annular curve has space Dgap。
In preferred embodiment, the first electrode includes at least one first straight line, and the first straight line is directly connected to To the driving line perhaps line of induction and vertical with the driving line or the line of induction；
The second electrode includes one and extends straight line and at least one one end and be connected to and described extend the second straight of straight line Line, described extension straight line one end are connected to the driving line or the line of induction and, institute vertical with the driving line or the line of induction It is vertical with the extension straight line to state second straight line；
The first straight line and the extension straight line and the second straight line are non-intersecting, and the first straight line and described the Two straight lines are staggered in parallel by fixed spacing.
Preferably, between the every driving line or several first electrodes and the second electrode of line of induction connection Every arrangement.
Preferably, the orthogonal arrangement of the first straight line in horizontal or vertical direction, in two adjacent pixels.
The embodiment of the present invention has the beneficial effect that: by the electrode of the cyclic annular curve of application or a plurality of straight line be covered with the line of induction and The most areas between line is driven, makes electrode that there is isotropic detection feature, and the Inductance and Capacitance variation between electrode Curve smoothing improves the sensitivity of detection touch signal and the resolution of acquired touch signal.
Detailed description of the invention
Fig. 1 is the electrode structure of mutual inductance type capacitive touch screen in the prior art；
Fig. 2 is the shape of the gap area of the shape of finger indentation, finger moving direction and Inductance and Capacitance in the prior art Schematic diagram；
Fig. 3 is the change curve that interelectrode Inductance and Capacitance is obtained with finger mobile computing in the prior art；
Fig. 4 is ring electrode structure described in the embodiment of the present invention one and shows with the connection relationship of driving line and the line of induction It is intended to；
Fig. 5 is what the Inductance and Capacitance of ring electrode structure described in the embodiment of the present invention one was obtained with finger mobile computing Change curve；
Fig. 6 be a plurality of Straight Combination described in the embodiment of the present invention two electrode structure and with driving line and the line of induction Connection relationship diagram.
Specific embodiment
The realization process of the embodiment of the present invention is described in detail with reference to the accompanying drawings of the specification.
The embodiment of the present invention one, a kind of mutual inductance type capacitive touch screen, including driving line, the line of induction and electrode structure, electrode Structure includes first electrode and second electrode, the driving line connection of first electrode and touch screen, the sense of second electrode and touch screen Line is answered to connect；Alternatively, the line of induction of first electrode and touch screen connects, the driving line of second electrode and touch screen is connected；Electrode Structure has isotropic detection feature.
In preferred embodiment, electrode structure ring electrode structure as shown in Figure 4 and the company with driving line and the line of induction Connect relationship.Including driving line 1, the line of induction 2, first electrode 11 and second electrode 12；First electrode 11 and second electrode 12 Figure be inc cyclic annular curve, the cyclic annular curve of the cyclic annular curve of first electrode 11 and second electrode 12 is by between fixed Away from winding, first electrode 11 is connect with driving line 1, and second electrode 12 is connect with the line of induction 2.Wherein, the ring-type of first electrode 11 Curve is helix, meets formula 1:
Wherein, RDriveIt is half of a transfer point M on the spiral center O to the ring-type curve of the cyclic annular curve of first electrode 11 Diameter, R0For the starting point S of the ring-type curveDTo the distance of spiral center, u is the speed that transfer point M is displaced outwardly along radial direction Degree, ω are the angular speed that transfer point M surrounds spiral center O rotation,For what is formed through coordinate origin to transfer point M The angle of straight line and X-axis, this sentences spiral center O as coordinate origin.
In preferred embodiment, the cyclic annular curve of second electrode 12 meets formula 2:
Wherein, RSenseFor a transfer point M on the spiral center O to the ring-type curve of the cyclic annular curve of second electrode 121's Radius,For the starting point S of the cyclic annular curve of second electrode 12SWith the starting point S of the cyclic annular curve of first electrode 11DInitial phase Difference, preferablyIt can just bear, DgapFor the spacing of the cyclic annular curve of the cyclic annular curve and second electrode 12 of first electrode 11.It is public Same physical meaning is indicated with same letter in formula 1 in formula 2, can refer to mutually it should be understood that be not repeated herein.
Preferably, the space D of the cyclic annular curve of the cyclic annular curve and second electrode 12 of first electrode 11gapMeet formula 3:
Dgap≥0.5·(WD+WS)+DLith (3)
Wherein, WDFor the line width of the cyclic annular curve of first electrode 11, WSFor the line width of the cyclic annular curve of second electrode 12, DLithFor the minimum spacing between the cyclic annular curve of the cyclic annular Qu Huanyu second electrode 12 of the first electrode 11 of setting.Actually answering In, DLithIt can be attainable minimum electrode gap in technique, to avoid the intersection or coincidence of cyclic annular curved electrodes.
In further preferred embodiment, the cyclic annular curve of first electrode 11 further includes a section spiral line, the helix Meet the formula 1 of the cyclic annular curve of above-mentioned first electrode 11, and there is space D with the cyclic annular curve of second electrode 12gap。
Fig. 5 be according to embodiments of the present invention one electrode structure shown in Fig. 4 and finger moving direction institute shown in Fig. 2 The Inductance and Capacitance calculated opposite curve changed with finger movement.Wherein, K indicates time or finger moving distance, Inductance and Capacitance C is mobile according to moving direction D1 as shown in Figure 2 and moving direction D2, becomes as shown in Figure 5 with the change curve of K Change curve L3 and change curve L4, shows that L3 and L4 is overlapped in figure.Thus we are available, and the variation of Inductance and Capacitance C does not have As the finger moves direction and show anisotropic characteristic, there is isotropic characteristic, change curve is also relatively flat It is sliding, therefore, more accurate information can be extracted from touch signal.
Need to illustrate that on the other hand, such as Fig. 1 electrode structure in the prior art, most of area is by solid electrode institute It occupies, the area for really contributing to Inductance and Capacitance is the interval region of four prismatic electrodes.And the embodiment of the present invention one is attached Electrode structure shown in Fig. 4, the area of the overwhelming majority between the line of induction and driving line is all by the spacer region of driving and induction electrode Domain is covered with, it can the Inductance and Capacitance for obtaining higher unit area is higher than the sensitivity of touch as shown in Figure 1 Electrode structure.
A kind of electrode structure of the embodiment of the present invention two shown in Fig. 6, the electrode structure is by a plurality of linear electrode structure At.First electrode 13 includes at least one first straight line 131, and first straight line is connected directly to driving line 1 or the line of induction 2, and It is vertical with driving line 1 or the line of induction 2；
Second electrode 14 includes one and extends straight line 141 and at least one one end and be connected to and extend the second straight of straight line 141 Line 142, extend 141 one end of straight line be connected to driving line 1 or the line of induction 2 and with driving line 1 or the line of induction 2 it is vertical, second Straight line 142 is vertical with straight line 141 is extended；
First straight line 131 and extension straight line 141, second straight line 142 are non-intersecting, and first straight line 131 and second straight line 142 It is staggered in parallel by fixed spacing.
In preferred embodiment, several first electrodes 13 and second electrode 14 that every driving line 1 or the line of induction 2 connect It is alternatively arranged.
The orthogonal row of first straight line 131 in preferred embodiment, in horizontal or vertical direction, in two adjacent pixels Column.
In electrode structure shown in Fig. 6, electrode is made of electrode wires either vertically or horizontally.Each touch screen The gap cabling of the Inductance and Capacitance of the neighbouring pixel up and down of pixel all differs 90 degree with it.
Although portion in a pixel, the trend in gap is just as, and on entire touch screen, is avoided all Inductance and Capacitance gap is arranged all along a direction.Obtained touch signal is along vertically and horizontally more than two pixels Sliding distance can obtain it is isotropic as a result, the change curve that electrode structure shown in its change curve and Fig. 4 obtains Similar (referring to Fig. 5), is no longer repeated herein.
In addition, the area of the overwhelming majority between the line of induction and driving line is all by the gap area institute cloth of driving and induction electrode Full, sensitivity is significantly improved.
The embodiment of the present invention obtains following the utility model has the advantages that being covered with induction by the electrode of the cyclic annular curve of application or a plurality of straight line Most areas between line and driving line makes electrode have isotropic detection feature, and the Inductance and Capacitance between electrode Change curve is smooth, improves the sensitivity of detection touch signal and the resolution of acquired touch signal.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (2)

1. a kind of mutual inductance type capacitive touch screen, including driving line, the line of induction and electrode structure, the electrode structure includes the first electricity The driving line of pole and second electrode, the first electrode and touch screen connects, and the line of induction of the second electrode and touch screen connects It connects；Alternatively, the line of induction of the first electrode and touch screen connects, the driving line of the second electrode and touch screen is connected；Its Be characterized in that, the first electrode include at least one first straight line, the first straight line be connected directly to the driving line or Person's line of induction, and it is vertical with the driving line or the line of induction；
The second electrode includes that an extension straight line and at least one one end are connected to the second straight line for extending straight line, institute It states and extends straight line one end and be connected to the driving line or the line of induction and vertical with the driving line or the line of induction, described second Straight line is vertical with the extension straight line；
The first straight line and the extension straight line and the second straight line are non-intersecting, and the first straight line and described second is directly Line is staggered in parallel by fixed spacing；
Several first electrodes and the second electrode of the every driving line or line of induction connection are alternatively arranged.
2. mutual inductance type capacitive touch screen as described in claim 1, which is characterized in that in horizontal or vertical direction, two is adjacent The orthogonal arrangement of the first straight line in pixel.
CN201610078434.2A 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen Active CN105786278B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610078434.2A CN105786278B (en) 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610078434.2A CN105786278B (en) 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen
CN201210533695.0A CN103268176B (en) 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201210533695.0A Division CN103268176B (en) 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen

Publications (2)

Publication Number Publication Date
CN105786278A CN105786278A (en) 2016-07-20
CN105786278B true CN105786278B (en) 2018-12-14

Family

ID=56403335

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610078434.2A Active CN105786278B (en) 2012-12-11 2012-12-11 A kind of mutual inductance type capacitive touch screen

Country Status (1)

Country Link
CN (1) CN105786278B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1761155A (en) * 2004-10-13 2006-04-19 盛群半导体股份有限公司 Capacitance induction system
CN101727228A (en) * 2008-10-21 2010-06-09 华映视讯（吴江）有限公司 Touch panel and touch method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60241122A (en) * 1984-05-16 1985-11-30 Seiko Epson Corp Input device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1761155A (en) * 2004-10-13 2006-04-19 盛群半导体股份有限公司 Capacitance induction system
CN101727228A (en) * 2008-10-21 2010-06-09 华映视讯（吴江）有限公司 Touch panel and touch method thereof

Also Published As

Publication number Publication date
CN105786278A (en) 2016-07-20

Similar Documents

Publication Publication Date Title
CN103268176B (en) A kind of mutual inductance type capacitive touch screen
CN104298411A (en) Electromagnetic and capacitive integrated touch substrate, touch display panel and touch display device
CN103116432B (en) Three-dimensional manipulating control method, device and the mobile terminal thereof of a kind of touch-screen
EP2735945B1 (en) Touch signal scan apparatus and touch signal scan method
US9477357B2 (en) Touch input system and method for detecting touch using the same
CN105094490B (en) Touch display panel, touch display unit and its touch control method
US20170123528A1 (en) System and method for 3d position and gesture sensing of human hand
TWI480787B (en) Method for improving linearity of touch system coordinates
CN102081484A (en) Capacitance type touch sensing device and forming method thereof as well as touch display device
CN104503640B (en) A kind of bendable contact panel
US9874981B2 (en) Detection method and device for touch screen
CN104820532A (en) Touch device, driving method thereof, and liquid crystal display panel
CN102662540A (en) Driving frequency selection method for capacitive multipoint touch system
JP2014095968A (en) Touch panel device
CN104317469A (en) Touch screen and display device
CN206236055U (en) Touch induction device and its touch control device
CN102033637A (en) Touch screen position detection method
CN105786278B (en) A kind of mutual inductance type capacitive touch screen
CN103279238B (en) A kind of mutual inductance type capacitive touch screen
CN107329622A (en) A kind of contact panel, array base palte and display device
CN104035249B (en) Liquid crystal display device integrating touch function and touch position detecting method thereof
CN205092679U (en) Permanent magnet rotor magnetic shoe
CN102654803A (en) Touch panel and touch sensing pad
CN103294292B (en) The touch detecting method of a kind of capacitive touch screen and capacitive touch screen
US10216329B2 (en) Touch display panel

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant