CN104657008A - Touch sensing device and operation method thereof - Google Patents

Touch sensing device and operation method thereof Download PDF

Info

Publication number
CN104657008A
CN104657008A CN201310631990.4A CN201310631990A CN104657008A CN 104657008 A CN104657008 A CN 104657008A CN 201310631990 A CN201310631990 A CN 201310631990A CN 104657008 A CN104657008 A CN 104657008A
Authority
CN
China
Prior art keywords
drive
wire
group
drive wire
inductance capacitance
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.)
Pending
Application number
CN201310631990.4A
Other languages
Chinese (zh)
Inventor
高子铭
林永福
郑智仁
徐建昌
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.)
Morning Hair Polytron Technologies Inc
Original Assignee
ILI Techonology Corp
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 ILI Techonology Corp filed Critical ILI Techonology Corp
Publication of CN104657008A publication Critical patent/CN104657008A/en
Pending legal-status Critical Current

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

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)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The invention provides a touch sensing device and an operating method thereof. The touch sensing device includes a plurality of driving lines, a plurality of sensing lines crossing the plurality of driving lines, a driving unit, a sensing unit, and a demodulation unit. The driving unit drives the plurality of group driving lines simultaneously in a plurality of driving periods, and the driving unit provides driving voltages with different intensities and/or different phases to the plurality of driving lines in each driving period respectively. The sensing unit receives the total capacitance of each sensing line. The demodulation unit calculates the induction capacitance of each induction capacitor according to the total capacitance and the driving voltage. External noise interfering the induction capacitors is dispersed to the induction capacitors, the influence of external signals on a single induction capacitor is reduced, and the accuracy of the induction capacitance of each induction capacitor is improved.

Description

Touch sensing device and How It Works thereof
Technical field
The invention provides a kind of touch sensing device and How It Works thereof, particularly relate to a kind of touch sensing device and the How It Works thereof that improve touch-control accuracy.
Background technology
In recent years, touch control electronic device get more and more people use.It utilizes the Trackpad on electronic installation, allows user reach by pressing Trackpad the object controlling electronic installation.
In general, touch control electronic device comprises driver element, testing circuit, multiple drive wire and multiple sense wire.The Trackpad of electronic installation is provided with multiple drive wire and multiple sense wires arranged in a crossed manner respectively, and the infall of each drive wire and each sense wire is provided with a mutual capacitance (mutual capacitance).Driver element sequentially outputting drive voltage gives multiple drive wire, makes corresponding electric capacity produce induced electricity capacity.And the induced electricity capacity that testing circuit will detect on each sense wire.
When user presses a certain touch position of Trackpad, the induced electricity capacity of the electric capacity that touch position is corresponding will change.Now testing circuit is by detecting that the induced electricity capacity of the electric capacity that touch position is corresponding changes, to learn the touch position that user presses accordingly.
But, testing circuit is except induced electricity capacity being detected, outside noise (as temperature, humidity, electromagnetic interference (EMI), electrostatic, transformer noise or display noise etc.) also can be detected, make the jitter detected by testing circuit, cause touch-control effect bad, therefore how to improve the induced electricity capacity that detects and accuracy is real belongs to important.
Summary of the invention
The object of the present invention is to provide a kind of touch sensing device and How It Works thereof, drive many drive wires by driver element in multiple drive cycle, and driver element provides in each drive cycle the driving voltage of varying strength and/or out of phase to above-mentioned many drive wires respectively simultaneously.Make to disturb the outside noise of inductance capacitance to be distributed to multiple inductance capacitance, and then reduce the impact of outer signals on single inductance capacitance, improve the accuracy of the induced electricity capacity of each inductance capacitance.
In one of them embodiment of the present invention, above-mentioned touch sensing device comprises multiple drive wire, multiple sense wire, driver element, sensing cell and demodulating unit.Multiple drive wire sequentially be arranged in parallel.Multiple drive wire is divided at least one group.Each group has multiple drive wire and divides equally and the multiple groups drive wire formed.Multiple sense wire and multiple drive wire sequentially arranged in a crossed manner.Each drive wire is corresponding with the infall of each sense wire is provided with inductance capacitance.The drive wire of one end electrical connection correspondence of inductance capacitance, the sense wire of the other end electrical connection correspondence of inductance capacitance.Driver element is electrically connected multiple drive wire.Driver element drives multiple groups drive wire of same group according to the order of group simultaneously and drive multiple drive cycle in same group.In addition, driver element provides the driving voltage of varying strength to multiple groups drive wire respectively in each drive cycle of same group, and produces induced electricity capacity respectively at the inductance capacitance of correspondence.Wherein the quantity of multiple groups drive wire is identical with the quantity of multiple drive cycle.Sensing cell is then electrically connected multiple sense wire.Sensing cell receive multiple induced electricity capacity that multiple inductance capacitances corresponding to each sense wire produce add up after total capacitance.Demodulating unit is then electrically connected sensing cell.The total capacitance that each drive cycle of the same group that demodulating unit senses according to each sense wire produces and driving voltage, with the induced electricity capacity of inductance capacitance corresponding to each the group's drive wire calculating the same group on each sense wire respectively.When user presses a certain touch position of the touch-control surface of touch sensing device, demodulating unit will detect that the induced electricity capacity of the inductance capacitance that above-mentioned touch position is corresponding changes.Demodulating unit is learnt accordingly, and user presses the touch position of touch-control surface, to control electronic installation further.
In one of them embodiment of the present invention, above-mentioned touch sensing device comprises multiple drive wire and multiple sense wire.Multiple drive wire sequentially be arranged in parallel.Multiple drive wire is divided at least one group.Each group has multiple drive wire and divides equally and the multiple groups drive wire formed.Multiple sense wire and multiple drive wire sequentially arranged in a crossed manner.Each drive wire is corresponding with an infall of each sense wire is provided with inductance capacitance.The drive wire of one end electrical connection correspondence of inductance capacitance.The sense wire of the other end electrical connection correspondence of inductance capacitance.The How It Works of the touch-control accuracy of above-mentioned raising touch sensing device comprises the steps: that step (A) drives multiple groups drive wire of same group according to the order of group simultaneously and drive multiple drive cycle in same group, and in each drive cycle of same group, provide the driving voltage of varying strength to multiple groups drive wire respectively, and produce induced electricity capacity respectively at the inductance capacitance of correspondence.Wherein the quantity of multiple groups drive wire is identical with the quantity of multiple drive cycle.Total capacitance after multiple induced electricity capacity that multiple inductance capacitances that step (B) receives correspondence in each sense wire produce add up.The driving voltage of each drive cycle of the same group that step (C) senses according to each sense wire and total capacitance, calculate the induced electricity capacity of inductance capacitance corresponding to each group's drive wire of the same group on each sense wire respectively.Step (D) judges whether the induced electricity capacity of each inductance capacitance changes, and the touch position corresponding to inductance capacitance changed by induced electricity capacity is sent to back-end processing unit performs an analysis.Therefore user is when pressing a certain touch position of the touch-control surface of touch sensing device, demodulating unit will detect that the induced electricity capacity of the inductance capacitance that above-mentioned touch position is corresponding changes.Demodulating unit is learnt accordingly, and user presses the touch position of touch-control surface, and transmits touch position and perform an analysis to back-end processing unit, to control electronic installation further.
Further understand feature of the present invention and technology contents for enable, refer to following detailed description for the present invention and accompanying drawing, but these illustrate and institute's accompanying drawings is only used to the present invention is described, but not any restriction is done to right of the present invention.
Accompanying drawing explanation
Fig. 1 is the touch sensing device schematic diagram of one embodiment of the invention.
Fig. 2 is the part touch sensing device schematic diagram of Fig. 1.
Fig. 3 is multiple groups drive wire sequential chart of the same group of drive unit drives of one embodiment of the invention.
Fig. 4 is the How It Works process flow diagram of the touch sensing device of one embodiment of the invention.
Fig. 5 is the touching schematic surface that the user of one embodiment of the invention presses touch sensing device.
[symbol description]
50: touching surface
100: touch sensing device
110: driver element
120: sensing cell
122: AFE (analog front end) element
124: Analog-digital Converter element
130: demodulating unit
C1-C16: inductance capacitance
C36, C37, C38, C46, C47, C48, C56, C57, C58: inductance capacitance
GP1-GP4: group
Rx1-Rx18: sense wire
T1-T4: drive cycle
Tch: touch position
Tx1-Tx16: drive wire
Txg1-Txg16: group's drive wire
V11, V12, V13, V14, V21, V22, V23, V24, V31, V32, V33, V34, V41, V42, V43, V44: driving voltage
S410, S420, S430, S440: step
Embodiment
First, please refer to Fig. 1.Fig. 1 is the touch sensing device schematic diagram of one embodiment of the invention.As shown in Figure 1, touch sensing device 100 comprises drive wire Tx1-Tx16, sense wire Rx1-Rx18, driver element 110, sensing cell 120 and demodulating unit 130.Drive wire Tx1-Tx16 and sense wire Rx1-Rx18 is arranged at touching surface 50.Make user when pressing a certain touch position on touching surface 50, demodulating unit 130 can learn that user presses the touch position on touching surface 50.
Drive wire Tx1-Tx16 sequentially be arranged in parallel and is divided into group GP1-GP4.And each group GP1-GP4 all has drive wire Tx1-Tx16 divides equally and the multiple groups drive wire formed.At this, group GP1 corresponds to group drive wire Txg1-Txg4.Group GP2 corresponds to group drive wire Txg5-Txg8.Group GP3 corresponds to group drive wire Txg9-Txg12.Group GP4 corresponds to group drive wire Txg13-Txg16.In the present embodiment, drive wire has 16, group has 4 groups and group's drive wire has 4.But in practice, drive wire, group and group's drive wire also can be other quantity.As multiple drive wire have 30, group has 10 groups and group's drive wire has 3.Quantity between drive wire, group and group's drive wire only needs to meet multiple drive wire and is divided into multiple group and each group and all has multiple drive wire and divide equally and the multiple groups drive wire formed, and the present invention is not restricted this.
Sense wire Rx1-Rx18 and drive wire Tx1-Tx16 is sequentially arranged in a crossed manner.Each drive wire Tx1-Tx16 is corresponding with the infall of each sense wire Rx1-Rx18 is provided with inductance capacitance (Fig. 1 is not shown).The drive wire of one end electrical connection correspondence of inductance capacitance, and the sense wire that the other end electrical connection of inductance capacitance is corresponding.In order to further illustrate the annexation between sense wire, drive wire and inductance capacitance, lay down a definition with the annexation between drive wire Tx1-Tx16, sense wire Rx1 and inductance capacitance C1-C16 below.As shown in Figure 2, drive wire Tx1-Tx16 is corresponding with the infall of sense wire Rx1 is provided with inductance capacitance C1-C16.One end of inductance capacitance C1-C16 is electrically connected corresponding drive wire Tx1-Tx16 respectively, and the sense wire Rx1 that the other end electrical connection of inductance capacitance C1-C16 is corresponding.In the present embodiment, sense wire Rx1-Rx18 and drive wire Tx1-Tx16 is that sequentially square crossing is arranged.And in practice, sense wire Rx1-Rx18 and drive wire Tx1-Tx16 also can be the relation arranged in a crossed manner of other angles.Relation arranged in a crossed manner between each sense wire Rx1-Rx18 with each drive wire Tx1-Tx16 is all consistent, and the present invention is not restricted this.In addition, the sense wire of the present embodiment has 18.But in practice, sense wire also can be other quantity, as sense wire has 32, the present invention is not restricted this.
Driver element 110 is electrically connected drive wire Tx1-Tx16, and sensing cell 120 is electrically connected sense wire Rx1-Rx18.Driver element 110 drives group's drive wire of same group according to the order of group GP1-GP4 simultaneously, also namely driver element 110 sequentially drives the group drive wire Txg1-Txg4 of group GP1, drives the group drive wire Txg5-Txg8 of group GP2, drives the group drive wire Txg9-Txg12 of group GP3 and drives the group drive wire Txg13-Txg16 of group GP4, and in same group, drive multiple drive cycle (the drive cycle T1-T4 as Fig. 3).And driver element 110 provide respectively in each drive cycle of same group the driving voltage of varying strength to group's drive wire (as the driving voltage V11 of Fig. 3, V12, V13, V14, V21, V22, V23, V24, V31, V32, V33, V34, V41, V42, V43, V44).In the present embodiment, the intensity voltage value of driving voltage is between 5 ~ 20 volts, and drive cycle is between 100 ~ 500 microseconds (μ s).In addition driver element 110 also can provide the driving voltage of out of phase respectively in each drive cycle of same group, or the driving voltage of varying strength and out of phase is to group's drive wire (Fig. 3 is not shown), and the present invention is not restricted this.Then the inductance capacitance that group's drive wire is corresponding will produce induced electricity capacity (the inductance capacitance C1-C4 as Fig. 2) respectively.At this, the quantity of group's drive wire is identical with the quantity of drive cycle, and the quantity as the drive cycle T1-T4 of group drive wire Txg1-Txg4 and Fig. 3 of Fig. 2 is all 4.The mode of drive wire Tx1-Tx16 is driven by above-mentioned driver element 110, make to disturb the outside noise (as temperature, humidity, electromagnetic interference (EMI), electrostatic etc.) of inductance capacitance can be distributed to multiple inductance capacitance, as outside noise is distributed to the inductance capacitance C1-C4 of Fig. 2, to avoid outside noise directly to affect single inductance capacitance, and then the accuracy of induced electricity capacity of each inductance capacitance can be improved.
Then, total capacitance after the multiple induced electricity capacity receiving corresponding multiple inductance capacitances generations respectively add up by each sense wire Rx1-Rx18, the sense wire Rx1 as Fig. 2 receives the total capacitance after the induced electricity capacity totalling of inductance capacitance C1-C16 generation respectively in the drive cycle T1-T4 of Fig. 3.
In addition, please also refer to Fig. 2, sensing cell 120 comprises multiple AFE (analog front end) element 122(analog front end, AFE) and multiple Analog-digital Converter element 124(analog to digital, ADC).Each AFE (analog front end) element 122 correspondence connects each sense wire Rx1-Rx18, total capacitance after the multiple induced electricity capacity produced to receive corresponding multiple inductance capacitances respectively add up, AFE (analog front end) element 122 as Fig. 2 is electrically connected sense wire Rx1, and AFE (analog front end) element 122 receive in the drive cycle T1-T4 of Fig. 3 respectively inductance capacitance C1-C16 produce induced electricity capacity add up after total capacitance.Multiple AFE (analog front end) element 122 is connected respectively multiple Analog-digital Converter element 124, and to convert the total capacitance received to digital signal pattern respectively, and the total capacitance transmitting digital forms is to demodulating unit 130.
Demodulating unit 130 is for being electrically connected to sensing cell 120.And the total capacitance that each drive cycle of the same group sensed according to each sense wire produces by demodulating unit 130 and driving voltage, with the induced electricity capacity of inductance capacitance corresponding to each the group's drive wire calculating the same group on each sense wire respectively, the demodulating unit 130 as Fig. 2 calculates the induced electricity capacity of inductance capacitance C1-C4 corresponding to the group drive wire Txg1-Txg4 of the group GP1 on sense wire Rx1.Therefore, when there being user to press a certain touch position on touching surface, demodulating unit 130 by detect the induced electricity capacity of the inductance capacitance that above-mentioned touch position is corresponding change and touch surface the induced electricity capacity of inductance capacitance corresponding to other positions all without changing.Demodulating unit 130 can be learnt accordingly, and user presses the touch position on touching surface.
Next, please also refer to Fig. 4.Fig. 4 is the How It Works process flow diagram of the touch sensing device of one embodiment of the invention.First, driver element 110 drives multiple groups drive wire of same group according to the order of group GP1-GP4 simultaneously, and also namely driver element 110 sequentially drives the group drive wire Txg1-Txg4 of group GP1, drives the group drive wire Txg5-Txg8 of group GP2, drives the group drive wire Txg9-Txg12 of group GP3 and drives the group drive wire Txg13-Txg16 of group GP4.And driver element 110 drives multiple drive cycle in same group, as driver element 110 drives 4 drive cycle T1-T4 of Fig. 3 in group GP1.And driver element 110 provides the driving voltage of varying strength to multiple groups drive wire respectively in each drive cycle of same group.As driver element 110 to provide the driving voltage V11 of Fig. 3 respectively in the drive cycle T1 of group GP1, V12, V13, V14 to group drive wire Txg1-Txg4, the driving voltage V21 that Fig. 3 is provided respectively in the drive cycle T2 of group GP1, V22, V23, V24 to group drive wire Txg1-Txg4, the driving voltage V31 that Fig. 3 is provided respectively in the drive cycle T3 of group GP1, V32, V33, V34 are to group drive wire Txg1-Txg4 and the driving voltage V41 providing Fig. 3 in the drive cycle T4 of group GP1 respectively, V42, V43, V44 are to group drive wire Txg1-Txg4.Wherein the quantity of multiple groups drive wire is identical with the quantity of multiple drive cycle, and the quantity as the drive cycle T1-T4 of group drive wire Txg1-Txg4 and Fig. 3 of Fig. 2 is all 4, and produces induced electricity capacity (step S410) respectively at the inductance capacitance of correspondence.The mode of drive wire Tx1-Tx16 is driven from driver element 110, the outside noise of interference inductance capacitance will be distributed to multiple inductance capacitance (as outside noise is distributed to the inductance capacitance C1-C4 of Fig. 2), to avoid outside noise directly to affect single inductance capacitance, and then the accuracy of induced electricity capacity of each inductance capacitance can be improved.
Next, the total capacitance after the induced electricity capacity that multiple inductance capacitances that each sense wire receives correspondence then produce adds up.Sense wire Rx1-Rx18 as Fig. 1 receive in each drive cycle corresponding multiple inductance capacitances the induced electricity capacity that produces add up after total capacitance.Then the noise of each sense wire filtering total capacitance, and convert total capacitance to digital signal pattern, do further analysis (step S420) with total capacitance to the demodulating unit 130 transmitting digital forms.
Come again, the driving voltage of each drive cycle of the same group that demodulating unit 130 senses according to each sense wire and total capacitance, calculate the induced electricity capacity (step S430) of inductance capacitance corresponding to each group's drive wire of the same group on each sense wire respectively.If demodulating unit 130 is according to the driving voltage V11 of the drive cycle T1-T4 of Fig. 3, V12, V13, V14, V21, V22, V23, V24, V31, V32, V33, V34, V41, V42, V43, total capacitance after V44 and inductance capacitance C1-C4 adds up respectively at the induced electricity capacity that drive cycle T1-T4 produces, and calculate the induced electricity capacity of inductance capacitance C1-C4.
At this, demodulating unit 130 calculates the induced electricity capacity of inductance capacitance corresponding to each group's drive wire of the same group on each sense wire with carat agate arithmetic expression (Cramer ' s Rule).Carat agate arithmetic expression is as follows:
Wherein, S t1s tnthe total capacitance that the inductance capacitance of the same group sensed for same sense wire produces at each drive cycle, the inductance capacitance C1-C4 that the sense wire Rx1 as Fig. 2 senses group GP1 Fig. 3 drive cycle T1-T4 the total capacitance that produces.[V 11~ V 1n], [V 21~ V 2n] ... [V n1~ V nn] in each drive cycle of same group, driver element 110 is provided to the driving voltage of multiple groups drive wire respectively.Driver element 110 as Fig. 2 provides the driving voltage V11 of varying strength respectively in the drive cycle T1 of group GP1, V12, V13, V14 is to group drive wire Txg1-Txg4, the driving voltage V21 of varying strength is provided respectively in the drive cycle T2 of group GP1, V22, V23, V24 is to group drive wire Txg1-Txg4, the driving voltage V31 of varying strength is provided respectively in the drive cycle T3 of group GP1, V32, V33, V34 is to group drive wire Txg1-Txg4, and the driving voltage V41 of varying strength is provided respectively in the drive cycle T4 of group GP1, V42, V43, V44 is to group drive wire Txg1-Txg4.C 1c nthe induced electricity capacity of multiple groups drive wire of the same group sensed for same sense wire, the sense wire Rx1 as Fig. 2 senses the induced electricity capacity of the inductance capacitance C1-C4 of group GP1.
In addition, in the present embodiment, driving voltage is made up of multiple identical pulse voltage, as the driving voltage of the group drive wire Txg1 of the drive cycle T1 of Fig. 3 by 4 pulse voltages form.Therefore, each sense wire can select in multiple pulse voltage in advance preferably pulse voltage as driving voltage, as sense wire Rx1 selects the 2nd pulse voltage as the driving voltage of drive cycle T1 in the drive cycle T1 of Fig. 3, perform an analysis to be supplied to demodulating unit 130.Or each sense wire can sense multiple electric capacity summation in same drive cycle, then demodulating unit 130 average multiple electric capacity summation to produce total capacitance.As sense wire Rx1 senses 4 electric capacity summations in the drive cycle T1 of Fig. 3, then average 4 electric capacity summations of demodulating unit 130 and produce total capacitance.Therefore driving voltage is made up of multiple identical pulse voltage, the problem that driver element 110 provides unstable driving voltage can reduced further, make demodulating unit 130 can obtain total capacitance more accurately.Certainly, driving voltage also can be made up of or lasting outputting drive voltage a pulse voltage, and the present invention is not restricted this.In addition, the pulse voltage of the present embodiment can be the waveform of square wave, string ripple, triangular wave or other patterns, and the present invention is not restricted this.
And after step S430, whether the induced electricity capacity that demodulating unit 130 can detect each inductance capacitance be arranged on drive wire Tx1-Tx16 and sense wire Rx1-Rx18 further changes, and the touch position corresponding to inductance capacitance changed by induced electricity capacity is sent to back-end processing unit (scheming not shown) performs an analysis (step S440).Therefore, when there being user to press a certain touch position on touching surface, demodulating unit 130 by detect the induced electricity capacity of the inductance capacitance that above-mentioned touch position is corresponding change and the induced electricity capacity touching the inductance capacitance corresponding to other positions on surface all without changing, then demodulating unit 130 transmits touch position and analyzes further to back-end processing unit, back-end processing unit can be learnt accordingly, and user presses the touch position on touching surface, and controls the electronic installation of rear end further.
The situation of the induced electricity capacity of each inductance capacitance is calculated in order to further illustrate driver element 110 drive drive wire Tx1-Tx16, sensing cell 120 to sense in each drive cycle total capacitance that each sense wire Rx1-Rx18 receives and demodulating unit 130.Please also refer to Fig. 2 and Fig. 3, to illustrate that driver element 110 drives the group drive wire Txg1-Txg4 of group GP1 simultaneously below, and driver element 110 exports the driving voltage V11 of varying strength respectively in the drive cycle T1-T4 of group GP1, V12, V13, V14, V21, V22, V23, V24, V31, V32, V33, V34, V41, V42, V43, V44 is to drive wire Tx1-Tx4, sense wire Rx1 receives the total capacitance after the induced electricity capacity totalling of inductance capacitance C1-C4 correspondence generation respectively in drive cycle T1-T4, and demodulating unit 130 calculates the induced electricity capacity of inductance capacitance C1-C4 respectively.
Please also refer to Fig. 2 and Fig. 3.Driver element 110 drives group drive wire Txg1-Txg4 in group GP1 simultaneously.Group's drive wire due to the present embodiment is 4, therefore drive cycle will be set as 4 time cycles, and namely the drive cycle of Fig. 3 is T1-T4.Following driver element 110 drives 4 drive cycle T1-T4 by the group drive wire Txg1-Txg4 of group GP1, and each drive cycle provides the driving voltage of varying strength to group drive wire Txg1-Txg4 respectively, as shown in Figure 3.Also be driver element 110 difference outputting drive voltage V11 in drive cycle T1, V12, V13, V14 is to group drive wire Txg1-Txg4, difference outputting drive voltage V21 in drive cycle T2, V22, V23, V24 is to group drive wire Txg1-Txg4, difference outputting drive voltage V31 in drive cycle T3, V32, V33, V34 is to group drive wire Txg1-Txg4, and outputting drive voltage V41 is distinguished in drive cycle T4, V42, V43, V44 is to group drive wire Txg1-Txg4.
Inductance capacitance C1-C4 also will produce induced electricity capacity respectively in 4 drive cycle T1-T4.Total capacitance S after the induced electricity capacity that the inductance capacitance C1-C16 correspondence that now sense wire Rx1 will receive each drive cycle respectively produces adds up t1, S t2, S t3, S t4.Now, due to driver element 110, outputting drive voltage is not to each group's drive wire of group GP2-GP4, and inductance capacitance C5-C16 can not produce induced electricity capacity, so time total capacitance be the summation of induced electricity capacity that inductance capacitance C1-C4 correspondence produces.Also namely when drive cycle T1, the total capacitance S that sense wire Rx1 receives t1for V11 × C1+V12 × C2+V13 × C3+V14 × C4.When drive cycle T2, the total capacitance S that sense wire Rx1 receives t2for V21 × C1+V22 × C2+V23 × C3+V24 × C4.When drive cycle T3, the total capacitance S that sense wire Rx1 receives t3for V31 × C1+V32 × C2+V33 × C3+V34 × C4.When drive cycle T4, the total capacitance S that sense wire Rx1 receives t4for V41 × C1+V42 × C2+V43 × C3+V44 × C4.
Total capacitance S t1, S t2, S t3, S t4carat agate arithmetic expression is obtained as follows after arranging:
S T 1 S T 2 S T 3 S T 4 = V 11 V 12 V 13 V 14 V 21 V 22 V 23 V 24 V 31 V 32 V 33 V 34 V 41 V 42 V 43 V 44 C 1 C 2 C 3 C 4 , det ( V ) ≠ 0
Come again, demodulating unit 130 will calculate the induced electricity capacity of the inductance capacitance C1-C4 on sense wire Rx1 according to above-mentioned carat agate arithmetic expression, namely also C1 be through det(V1)/det(V) calculating obtains, C2 is through det(V2)/det(V) calculate obtain, C3 is through det(V3)/det(V) calculate obtain, and C4 is through det(V4)/det(V) calculating obtain.And in same drive cycle T1-T4, demodulating unit 130 also calculates on sense wire Rx2-Rx18 in the same way respectively, the induced electricity capacity of the inductance capacitance that the group drive wire Txg1-Txg4 of group GP1 is corresponding.Make demodulating unit 130 through drive cycle T1-T4(i.e. 1-4 drive cycle) after, just can calculate the induced electricity capacity of each inductance capacitance of the infall of group drive wire Txg1-Txg4 and sense wire Rx1-Rx18.
Similarly, demodulating unit 130 after 4 drive cycles (i.e. 5-8 drive cycle), just can calculate the induced electricity capacity of the inductance capacitance of the infall of group drive wire Txg5-Txg8 and sense wire Rx1-Rx18 again.And demodulating unit 130 also can after 9-12 drive cycle, obtain the induced electricity capacity of the inductance capacitance of the infall of group drive wire Txg9-Txg12 and sense wire Rx1-Rx18, and demodulating unit 130 is after 13-16 drive cycle, obtain the induced electricity capacity of the inductance capacitance of the infall of group drive wire Txg13-Txg16 and sense wire Rx1-Rx18.Therefore from the above, the demodulating unit 130 of the present embodiment can obtain the induced electricity capacity of each inductance capacitance be arranged on drive wire Tx1-Tx16 and sense wire Rx1-Rx18 after 16 drive cycles.
Please also refer to Fig. 5 again, when user is with the touch position Tch on finger presses touching surface 50, the induced electricity capacity of inductance capacitance C36, C37, C38, C46, C47, C48, C56, C57, C58 of the infall of drive wire Tx3-Tx5 and sense wire Rx6-Rx8 changes to touch position Tch because of finger contact.In the present embodiment, induced electricity capacity is for increasing to touch position Tch because of finger contact.Now, demodulating unit 130 will calculate the induced electricity capacity of each inductance capacitance, and learn that the induced electricity capacity of inductance capacitance C36, C37, C38, C46, C47, C48, C56, C57, the C58 on touch position Tch changes, and the induced electricity capacity of inductance capacitance beyond touch position Tch does not all change.Then, demodulating unit 130 will transmit touch position Tch to back-end processing unit (as the microcontroller (micro-controller in mobile phone, MCU)) perform an analysis, back-end processing unit can be learnt accordingly, and user presses the touch position Tch on touching surface 50, and controls the electronic installation (as mobile phone) of rear end further.
In sum, the touch sensing device that the embodiment of the present invention provides and How It Works thereof, drive many drive wires by driver element 110 in multiple drive cycle, and driver element 110 provides in each drive cycle the driving voltage of varying strength and/or out of phase to above-mentioned many drive wires respectively simultaneously.Make to disturb the outside noise of inductance capacitance to be distributed to multiple inductance capacitance, and then reduce the impact of outer signals on single inductance capacitance, improve the accuracy of the induced electricity capacity of each inductance capacitance.
The foregoing is only embodiments of the invention, it is also not used to limit to the scope of the claims of the present invention.

Claims (12)

1. a touch sensing device, is characterized in that, described touch sensing device comprises:
Multiple drive wire, is sequentially arranged abreast, and described drive wire is divided at least one group, and group described in each has is divided equally by described drive wire and the multiple groups drive wire formed;
Multiple sense wire, described sense wire and described drive wire are sequentially arranged across, drive wire described in each is corresponding with an infall of sense wire described in each is provided with an inductance capacitance, and the described drive wire that one end of described inductance capacitance electrical connection is corresponding, the described sense wire of the other end electrical connection correspondence of described inductance capacitance;
One driver element, be electrically connected described drive wire, described driver element drives the described group drive wire of same group according to the order of described group simultaneously and drive multiple drive cycle in same group, and a driving voltage of varying strength is supplied to described group drive wire respectively by described driver element in each drive cycle of same group, the quantity of wherein said group drive wire is identical with the quantity of described drive cycle;
One sensing cell, is electrically connected described sense wire, described sensing cell receive induced electricity capacity that described inductance capacitance corresponding to sense wire described in each produce add up after a total capacitance; And
One demodulating unit, be electrically connected described sensing cell, the described total capacitance that each drive cycle of the same group that described demodulating unit senses according to each sense wire produces and described driving voltage, with calculate respectively same group on sense wire described in each each described in the described induced electricity capacity of described inductance capacitance corresponding to group's drive wire.
2. touch sensing device according to claim 1, is characterized in that, described demodulating unit calculates the described induced electricity capacity of each inductance capacitance on sense wire described in each with one carat of agate arithmetic expression, and described carat agate arithmetic expression is:
Wherein, S t1s tnthe described total capacitance that the described inductance capacitance of the same group sensed for same sense wire produces at each drive cycle, [V 11~ V 1n], [V 21~ V 2n] ... [V n1~ V nn] for same group each described in drive cycle, described driver element is supplied to the described driving voltage of described group drive wire respectively, C 1c nthe described induced electricity capacity of the described group drive wire of the same group sensed for same sense wire.
3. touch sensing device according to claim 1, is characterized in that, in drive cycle described in each, described driving voltage is made up of identical multiple pulse voltages.
4. touch sensing device according to claim 1, it is characterized in that, described driver element drives the described group drive wire of same group according to the order of described group simultaneously and drive described drive cycle in same group, and the described driving voltage of out of phase is supplied to described group drive wire respectively by described driver element in each drive cycle of same group.
5. touch sensing device according to claim 1, it is characterized in that, described sensing cell comprises multiple AFE (analog front end) element and multiple Analog-digital Converter element, described in each, AFE (analog front end) element correspondence connects described sense wire, to receive described total capacitance respectively, and AFE (analog front end) element correspondence connects described Analog-digital Converter element described in each, to convert described total capacitance to digital signal pattern, and the described total capacitance of digital signal pattern is sent to described demodulating unit.
6. touch sensing device according to claim 1, it is characterized in that, described drive wire and described sense wire are arranged at a touching surface, when a user touches a touch position on described touching surface, described demodulating unit detects that the described induced electricity capacity of the described inductance capacitance that described touch position is corresponding changes, and described touch position is sent to a back-end processing unit and performs an analysis.
7. the How It Works of a touch sensing device, described touch sensing device comprises multiple drive wire and multiple sense wire, described drive wire is sequentially arranged abreast, described drive wire is divided at least one group, group described in each has is divided equally by described drive wire and the multiple groups drive wire formed, described sense wire and described drive wire are sequentially arranged across, drive wire described in each is corresponding with an infall of sense wire described in each is provided with an inductance capacitance, and the described drive wire that one end of described inductance capacitance electrical connection is corresponding, the described sense wire of the other end electrical connection correspondence of described inductance capacitance, it is characterized in that, the How It Works of described touch sensing device comprises the steps:
Drive the described group drive wire of same group according to the order of described group simultaneously and drive multiple drive cycle in same group, and respectively a driving voltage of varying strength is supplied to described group drive wire in each drive cycle of same group, the quantity of wherein said group drive wire is identical with the quantity of described drive cycle, and produces an induced electricity capacity respectively at the described inductance capacitance of correspondence;
A total capacitance after the described induced electricity capacity that the described inductance capacitance that sense wire described in each receives correspondence produces adds up; And
The described driving voltage of each drive cycle of the same group sensed according to sense wire described in each and described total capacitance, calculate respectively the same group on sense wire described in each each described in the described induced electricity capacity of described inductance capacitance corresponding to group's drive wire.
8. the How It Works of touch sensing device according to claim 7, is characterized in that, in calculate on each sense wire each described in the described induced electricity capacity of inductance capacitance time, calculated by one carat of agate arithmetic expression, described carat agate arithmetic expression is:
Wherein, S t1s tnthe described total capacitance that the described inductance capacitance of the same group sensed for same sense wire produces at each drive cycle, [V 11~ V 1n], [V 21~ V 2n] ... [V n1~ V nn] in each drive cycle of same group, be supplied to the described driving voltage of described group drive wire respectively, C 1c nthe described induced electricity capacity of the described group drive wire of the same group sensed for same sense wire.
9. the How It Works of touch sensing device according to claim 7, is characterized in that, in drive cycle described in each, described driving voltage is made up of identical multiple pulse voltages.
10. the How It Works of touch sensing device according to claim 7, is characterized in that, in each drive cycle of same group, respectively the described driving voltage of out of phase is supplied to described group drive wire.
The How It Works of 11. touch sensing devices according to claim 7, is characterized in that, described in each, sense wire also comprises step after receiving described total capacitance: convert described total capacitance to digital signal pattern.
The How It Works of 12. touch sensing devices according to claim 7, it is characterized in that, after the described induced electricity capacity of each inductance capacitance calculated on sense wire described in each, also comprise step: judge whether the described induced electricity capacity of each inductance capacitance changes, and the touch position corresponding to described inductance capacitance changed by described induced electricity capacity is sent to a back-end processing unit performs an analysis.
CN201310631990.4A 2013-11-15 2013-11-28 Touch sensing device and operation method thereof Pending CN104657008A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW102141754 2013-11-15
TW102141754A TWI505165B (en) 2013-11-15 2013-11-15 Touch sensor and operating method thereof

Publications (1)

Publication Number Publication Date
CN104657008A true CN104657008A (en) 2015-05-27

Family

ID=53248226

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310631990.4A Pending CN104657008A (en) 2013-11-15 2013-11-28 Touch sensing device and operation method thereof

Country Status (2)

Country Link
CN (1) CN104657008A (en)
TW (1) TWI505165B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106227384A (en) * 2016-07-27 2016-12-14 北京集创北方科技股份有限公司 The method of sensitive information, device and relevant device is obtained from touch sensitive surface
CN106708304A (en) * 2015-11-13 2017-05-24 晨星半导体股份有限公司 Touch display panel, and related driving circuit and driving method
CN108874197A (en) * 2017-05-16 2018-11-23 奇景光电股份有限公司 The method for sensing of touch panel and touch panel
WO2020037868A1 (en) * 2018-08-21 2020-02-27 广州视源电子科技股份有限公司 Touchscreen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI742405B (en) 2019-07-19 2021-10-11 聯陽半導體股份有限公司 Touch detection apparatus and touch detection method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102033637A (en) * 2009-09-29 2011-04-27 上海天马微电子有限公司 Touch screen position detection method
CN102193668A (en) * 2010-03-11 2011-09-21 联咏科技股份有限公司 Sensing driving device, touch sensing system and sensing driving method
CN102226883A (en) * 2007-01-03 2011-10-26 苹果公司 Touch sensing device, method, electronic device including touch sensing device
CN102622152A (en) * 2012-02-29 2012-08-01 华映视讯（吴江）有限公司 Touch device and touch sensing method
WO2012169215A1 (en) * 2011-06-10 2012-12-13 シャープ株式会社 Touch panel controller and electronic apparatus employing same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7868874B2 (en) * 2005-11-15 2011-01-11 Synaptics Incorporated Methods and systems for detecting a position-based attribute of an object using digital codes
US10969917B2 (en) * 2008-01-30 2021-04-06 Apple Inc. Auto scanning for multiple frequency stimulation multi-touch sensor panels
JP5350437B2 (en) * 2011-06-27 2013-11-27 シャープ株式会社 Touch sensor system
JP5389888B2 (en) * 2011-10-25 2014-01-15 シャープ株式会社 Touch panel system and electronic device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226883A (en) * 2007-01-03 2011-10-26 苹果公司 Touch sensing device, method, electronic device including touch sensing device
CN102033637A (en) * 2009-09-29 2011-04-27 上海天马微电子有限公司 Touch screen position detection method
CN102193668A (en) * 2010-03-11 2011-09-21 联咏科技股份有限公司 Sensing driving device, touch sensing system and sensing driving method
WO2012169215A1 (en) * 2011-06-10 2012-12-13 シャープ株式会社 Touch panel controller and electronic apparatus employing same
CN102622152A (en) * 2012-02-29 2012-08-01 华映视讯（吴江）有限公司 Touch device and touch sensing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106708304A (en) * 2015-11-13 2017-05-24 晨星半导体股份有限公司 Touch display panel, and related driving circuit and driving method
CN106227384A (en) * 2016-07-27 2016-12-14 北京集创北方科技股份有限公司 The method of sensitive information, device and relevant device is obtained from touch sensitive surface
CN106227384B (en) * 2016-07-27 2019-03-15 北京集创北方科技股份有限公司 The method, apparatus and relevant device of sensitive information are obtained from touch sensitive surface
CN108874197A (en) * 2017-05-16 2018-11-23 奇景光电股份有限公司 The method for sensing of touch panel and touch panel
WO2020037868A1 (en) * 2018-08-21 2020-02-27 广州视源电子科技股份有限公司 Touchscreen

Also Published As

Publication number Publication date
TW201519057A (en) 2015-05-16
TWI505165B (en) 2015-10-21

Similar Documents

Publication Publication Date Title
CN104657008A (en) Touch sensing device and operation method thereof
CN103124953B (en) There is the capacitive touch sensors relevant to receptor
CN103729073B (en) Active capacitance pen
US8525798B2 (en) Touch sensing
CN108141212B (en) Capacitance measuring device with reduced noise
CN103488316B (en) Capacitance pen, capacitance touching control panel and touch device
CN102736774B (en) Driving and sensing method of touch input device and module thereof
CN103279246B (en) Capacitive type touch pad
US9182867B2 (en) Apparatus and method for detecting adjacent object and method of driving electronic device
CN103336644B (en) Touch sensing device and driving method thereof
US8766624B2 (en) Position detector and position detection method
CN103365507B (en) Sensing device and method for improving reliability of capacitive touch device
CN103543888A (en) Capacitive touch device and sensing method thereof
CN102945110B (en) The noise filtering method of capacitance type touch-control panel and system
CN1945513A (en) Cursor controlling device and method
CN103699282B (en) Touch control display apparatus
CN103324338B (en) Touch device and driving method thereof
CN103064549B (en) touch communication system
CN102915169A (en) Touch screen scanning method
CN217085101U (en) Capacitance detection circuit, touch control chip and electronic equipment
CN203324956U (en) Capacitive touch screen
CN100555194C (en) Touch type inductor and its implementation
CN109445628A (en) The reading circuit and its large scale capacitance touching control screen of large scale capacitance touching control screen
CN1952863B (en) Touch type induction system
CN203376723U (en) Capacitive touch screen

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: Taiwan Hsinchu County China jhubei City, Taiwan two yuan Street No. 1 10 floor -1

Applicant after: ILI TECHNOLOGY Corp.

Address before: Taiwan Hsinchu County China jhubei City, Taiwan two yuan Street No. 1 10 floor -1

Applicant before: Morning hair Polytron Technologies Inc.

TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20161223

Address after: Taiwan Hsinchu County China jhubei City, Taiwan two yuan Street No. 1 10 floor -1

Applicant after: Morning hair Polytron Technologies Inc.

Address before: Taiwan, China

Applicant before: ILI Technology Corp.

WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150527