CN101727231B - Touch sensing deving and method for correcting output thereof - Google Patents

Touch sensing deving and method for correcting output thereof Download PDF

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Publication number
CN101727231B
CN101727231B CN2009101400848A CN200910140084A CN101727231B CN 101727231 B CN101727231 B CN 101727231B CN 2009101400848 A CN2009101400848 A CN 2009101400848A CN 200910140084 A CN200910140084 A CN 200910140084A CN 101727231 B CN101727231 B CN 101727231B
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raw data
data
touch sensing
mirror image
value
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CN101727231A (en
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张修赫
李桓周
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LG Display Co Ltd
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LG Display Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—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
    • G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display

Abstract

A touch sensing device and a method for correcting an output thereof are disclosed. The touch sensing device includes a touch sensor array including a plurality of touch sensors, a plurality of integrated circuits (ICs) that converts an output of the touch sensor array into digital data and generates raw data, and a data correction unit that generates correction values using differential values between adjacent raw data in the raw data generated by the ICs and removes successive correction values equal to or greater than a predetermined critical value from the correction values when a number of successive correction values equal to or greater than the predetermined critical value is less than a predetermined reference value.

Description

Touch sensing deving and the method that is used to proofread and correct its output
The cross reference of related application
The application advocates the rights and interests of korean patent application No.10-2008-0102577 that on October 20th, 2008 submitted to and the korean patent application No.10-2008-0122690 that submitted on Dec 4th, 2008; Be introduced among this paper for all purposes at this, just the same as setting forth fully in this article.
Technical field
The present invention relates to the method that a kind of touch sensing deving (touch sensing device) and a kind of is used to proofread and correct the output of this touch sensing deving, it can increase the sensitivity and the precision of touch sensing.
Background technology
Because household electrical appliance or personal digital equipment trend towards slim body and in light weight recently, thereby are replaced by touch sensing as the pushbutton switch of user's input link.
Capacitance type sensor, resistance sensor, pressure type sensor, optical sensor, ultrasonic type sensor or the like are called as touch sensing.Touch screen is to be made up of a plurality of touch sensing that is formed on the display device.
The touch sensing that is formed on the display device is connected to power lead, and with the signal wire electric coupling of display device.Therefore, be mixed with much noise in the output of touch sensing.Even without touch input, the deviation between the output of adjacent touch sensing also greatly appears.This deviation is known as the displacement level (swing level) of touch data.When the touch data that will be equal to or greater than predetermined threshold inputs to the summation of swing level and noise of touch data, touching signals treatment circuit recognizing touch operation data.Along with the swing level increase of noise and touch data, the sensitivity of touch sensing reduces.Particularly, the sensitivity of touch sensing receives the ratio that influences of swing level to receive The noise bigger.Therefore, must reduce the swing level of touch sensing, so that increase the sensitivity of touch sensing.
The touching signals treatment circuit can comprise a plurality of integrated circuit, and the deviation between this integrated circuit influences the output between this integrated circuit unfriendly.The result is contact identification error (error) to have occurred.
The touching signals treatment circuit compares former frame data and current frame data, and proofreaies and correct touch data according to result relatively.Yet owing to need frame memory to proofread and correct this touch data, the cost of touching signals treatment circuit increases.
Summary of the invention
The present invention provides a kind of touch sensing deving and a kind of to be used to proofread and correct the method for the output of this touch sensing deving, and it can increase the sensitivity and the precision of touch sensing.
On the one hand, the invention provides a kind of touch sensing deving, comprising: the touch sensing array that comprises a plurality of touch sensings; The output of touch sensing array is converted to a plurality of integrated circuit (IC) of numerical data and generation raw data; And adjustment of data unit; This adjustment of data unit by using produces corrected value through the differential values (differential value) between the adjacent raw data in the raw data of IC generation; And, from said corrected value, remove the continuous correction value that is equal to or greater than predetermined critical when the quantity of the continuous correction value that is equal to or greater than predetermined critical during less than pre-determined reference value.
On the other hand, the invention provides a kind of method that is used to proofread and correct the output of touch sensing deving, comprise through being connected to a plurality of integrated circuit (IC) of a plurality of touch sensings, convert the output of a plurality of touch sensings to numerical data, to produce raw data; Utilize the differential values between the adjacent raw data in the raw data that produces through IC, produce corrected value; And, from corrected value, remove the continuous correction value that is equal to or greater than predetermined critical when the quantity of the continuous correction value that is equal to or greater than predetermined critical during less than pre-determined reference value.
Description of drawings
Provide to further understanding of the present invention and form an instructions part annexed drawings set forth embodiment of the present invention and be used to explain principle of the present invention with instructions.In the accompanying drawings:
Fig. 1 is touch sensing deving and the calcspar of display device of illustrating according to the embodiment of the present invention;
Fig. 2-4 illustrates the various exemplary structure between touch sensing and the display panel;
Fig. 5 is the viewgraph of cross-section of illustrating the exemplary configurations of the inner touch sensing of the pel array that is installed in display panel;
Fig. 6 is the equivalent circuit diagram of illustrating the exemplary configurations of the inner touch sensing of the pel array that is installed in display panel;
Fig. 7 illustrates inner equivalent circuit diagram touch sensing and touch sensing integrated circuit (TSIC) of pel array that is installed in display panel;
Fig. 8 illustrates the experimental device of touch data;
Fig. 9 is the calcspar of illustrating the circuit structure of touch data correcting circuit;
Figure 10 A illustrates the instance that is presented at the test figure on the display panel;
Figure 10 B is for when touch data is presented on the display panel, be presented at the touch sensing on the experimental device output image catch photo;
Figure 11 is the three-dimensional graphics images that the output level of touch sensing is shown;
Figure 12 is noise and the oscillogram of illustrating in the output that is included in touch sensing of the deviation between the TSIC;
Figure 13 illustrates the voltage and the digital value of touch data;
Figure 14 is illustrated in the voltage and the digital value of touch data in the period of contact, and the voltage and the digital value of touch data in during noncontact;
First illustrative methods that is used to produce mirror image data is illustrated in Figure 15～18;
Figure 19 is illustrated in the quantity of the available passageway among each TSIC;
Figure 20 and 21 illustrates the corrected value of touch data and mirror image data;
Figure 22 and 23 illustrates the method for the output that is used for the defect correcting touch sensing;
Figure 24 by illustrate through on the touch data that off-set value " 512 " is added to the Figure 11 that obtains proofreading and correct through the bearing calibration of illustrating in Figure 15～23 acquisition result's three-dimensional graphics images;
Figure 25 and 26 illustrates second illustrative methods that is used to produce mirror image data;
The mirror image data that utilizes mean value calculation is illustrated in Figure 27～29, and this mean value is raw data, use correction data that raw data calculates and through off-set value being added to the mean value between the correction of a final proof value that obtains on each corrected value; And
Figure 30 and 31 illustrates to carry out and proofreaies and correct preceding raw data and proofread and correct the experimental result that raw data obtains through being utilized in the bearing calibration of illustrating in Figure 25～29.
Embodiment
Describe embodiments of the invention now in detail, illustrated these embodiment in the accompanying drawing.
Shown in Fig. 1～7, comprise touch sensing deving and display device according to the touch sensing and the display device of embodiment of the present invention.
Touch sensing deving comprises touch sensing array 14 and is used to handle the touching signals treatment circuit 15 of the output signal of touch sensing array 14.Touch sensing array 14 comprises a plurality of touch sensings that are connected to sense wire R1 to Ri.Extremely shown in Figure 4 like Fig. 1; Touch sensing array 14 can be stacked on the display panel 10 of display device; Can be inserted in the display panel 10, the pel array that perhaps can be formed on display panel 10 is inner, so that touch sensing array 14 forms unitary body with display panel 10.Touching signals treatment circuit 15 as shown in Figure 8 comprises a plurality of touch sensing integrated circuit (TSIC).Touching signals treatment circuit 15 is to the touch sensing service voltage of touch sensing array 14, and will convert numerical data to through the touch data voltage of sense wire R1 to Ri output and the differential voltage between the reference voltage from touch sensing.
Touch sensing deving also comprises the touch data correcting circuit, the swing level of the balanced touch data of this correcting circuit, and proofread and correct the deviation between the TSIC.Subsequently the touch data correcting circuit will be described.
Display device comprises display panel 10, time schedule controller 11, data drive circuit 12 and scan drive circuit 13.Display device can adopt flat-panel monitor, for example LCD (LCD), electroluminescent display (FED), plasma display (PDP) and such as the electroluminescent device (EL) of Organic Light Emitting Diode (OLED) display.In this embodiment, with LCD display device is described.
As shown in Figure 5, LCD can further comprise the back light unit BLU that light is offered display panel 10.Back light unit BLU can adopt light source to be arranged on the side-light type back light unit with the LGP opposite side, and perhaps light source is arranged on the direct-type backlight unit under the scatter plate.
Display panel 10 comprises top glass substrate GLS1, lower glass substrate GLS2 and the liquid crystal layer between top glass substrate GLS1 and lower glass substrate GLS2.The lower glass substrate GLS2 of display panel 10; Extremely shown in Figure 6 like Fig. 1; Comprise: the grid line G1 to Gn that many data line D1 to Dm, many and data line D1 to Dm intersect, be formed on data line D1 to Dm and each place, point of crossing of grid line G1 to Gn a plurality of thin film transistor (TFT)s (TFT), be used for liquid crystal cells Clc charge to data voltage a plurality of pixel electrodes 1, be connected to pixel electrode 1 and keep the holding capacitor Cst of the voltage constant of liquid crystal cells Clc, or the like.Liquid crystal cells Clc is arranged to matrix form through data line D1 to Dm with the decussate texture of grid line G1 to Gn.The top glass substrate GLS1 of display panel 10 comprises black matrix B M, color filter CF, public electrode 2, or the like.Public electrode 2 is formed on the top glass substrate according to the vertical electrical type of drive such as twisted-nematic (TN) pattern and vertical orientated (VA) pattern.Public electrode 2 and pixel electrode 1 are formed on the lower glass substrate GlS2 according to the level electricity type of drive such as in-plain switching (IPS) pattern and fringe field switching (FFS) pattern.Polaroid POL1 and POL2 attach to top glass substrate GLS1 and lower glass substrate GLS2 respectively.Be used for being respectively formed at top glass substrate GLS1 and lower glass substrate GLS2 in the oriented layer of the tilt angle of the interface adjustment liquid crystal of contact liquid crystal.Column wadding CS can be formed between top glass substrate GLS1 and the lower glass substrate GLS2, to keep the box clearance constant of liquid crystal cells Clc.
Time schedule controller 11 receives clock signal from the outside, for example data enable signal DE and Dot Clock CLK are used to control the control signal of each data drive circuit 12 and scan drive circuit 13 with generation.The operation time sequence control signal that is used for gated sweep driving circuit 13 comprises grid initial pulse GSP, grid shift clock GSC, grid output enable signal GOE, direction of displacement control signal DIR, or the like.The operation time sequence control signal that is used for control data driving circuit 12 comprises source sampling clock SSC, source output enable signal SOE, polarity control signal POL, or the like.Time schedule controller 11 control data driving circuits 12 and scan drive circuit 13, and also can produce the I/O operation time sequence control signal that is used to control touching signals treatment circuit 15, with control touching signals treatment circuit 15.For example, time schedule controller 11, as shown in Figure 7, can produce reset signal RST, reference voltage sampled signal SH0, touch voltage sampled signal SH1, or the like, be used to control the operation sequential of TSIC.
Data drive circuit 12 comprises multiple source drive integrated circult (IC).Data drive circuit 12 latchs digital of digital video data RGB under the control of time schedule controller 11, and with this digital of digital video data RGB convert to simulation just/negative gamma compensated voltage, with produce simulation just/negative gamma compensated voltage.Data drive circuit 12 just will simulated/bear gamma compensated voltage and supplied with data line D1 to Dm.
Scan drive circuit 13 comprises one or more scanner driver IC.Scan drive circuit 13 offers grid line G1 to Gn successively with scanning impulse (perhaps gate pulse).
Fig. 2 to 4 illustrates the various exemplary structure between touch sensing and the display panel 10.
As shown in Figure 2, touch sensing array 14 can comprise the touch sensing TS on the upper polarizer POL1 that is stacked on display panel 10.As shown in Figure 3, this touch sensing array 14 can be installed in the inside of display panel 10, and can comprise the touch sensing TS that places between upper polarizer POL1 and the top glass substrate GLS1.Touch sensing array 14 shown in Fig. 2 and 3 can be embodied as resistance laminar touch sensing, capacitance touching control sensor, surface acoustic wave (SAW) formula touch sensing or infrared-type touch sensor.
As shown in Figure 4, touch sensing array 14 can comprise the inner a plurality of touch sensing TS of pel array that are formed on display panel 10.The pel array of display panel 10 is formed on the lower glass substrate GLS2, and comprises data line D1 to Dm, grid line G1 to Gn, pixel switch TFT, holding capacitor Cst, pixel electrode 1, or the like.Each touch sensing TS as shown in Figure 4 all can comprise TFT and the capacitor that is used for acquisition sensor voltage.The pixel switch TFT of the TFT of touch sensing TS and pel array forms simultaneously, and the capacitor of touch sensing TS and holding capacitor Cst form simultaneously.
Fig. 5 to 7 illustrates inner touch sensing and the TSIC of pel array that is installed in display panel 10.Be installed in the inner touch sensing of pel array and be not limited to the embodiment that Fig. 5 to 7 illustrates, and can be with many different embodied.
As shown in Figs. 5 to 7, each touch sensing TS all can comprise sensor TFT Tss, holding capacitor CSTO and switching TFT Tsw.
The transparent window W of sensor TFT Tss and top glass substrate GLS1 is relative.The grid of sensor TFT Tss is connected to the terminal of Memory Reference pressure-wire STOL and holding capacitor CSTO.The drain electrode of sensor TFT Tss is connected to the bias voltage supply line BL that receives bias voltage Vbias, and the source electrode of sensor TFT Tss is connected to another terminal of holding capacitor CSTO and the drain electrode of switching TFT Tsw via first node n1.If the contact object such as user's finger or pointer (stylus) is placed on the top glass substrate GLS1 relative with sensor TFT Tss; Then the light from back light unit BLU transmits through lower glass substrate GLS2, liquid crystal layer and top glass substrate GlS1, by contacting reflection object and being incident on the semiconductor layer of sensor TFT Tss.According to the light quantity on the semiconductor layer that is incident on sensor TFT Tss, sensor TFT Tss produces electric current.
When switching TFT Tsw closed, holding capacitor CSTO was charged by the electric current that is produced by sensor TFT Tss.Then, when switching TFT Tsw conducting, holding capacitor CSTO discharge.
The black matrix B M of switching TFT Tsw and top glass substrate GLS1 is relative, so that light does not shine switching TFT Tsw.Switching TFT Tsw is in response to from the scanning impulse of grid line G1 to Gn and conducting.Switching TFT Tsw will supply with sense wire R1 to Ri by the voltage that holding capacitor CSTO emits.The grid of switching TFT Tsw is connected to grid line G1 to Gn.The drain electrode of switching TFT Tsw is connected to another terminal of source electrode and the holding capacitor CSTO of sensor TFT Tss via first node n1, and the source electrode of switching TFT Tsw is connected to sense wire R1 to Ri.
TSIC shown in Fig. 7 only is an embodiment who is connected to the touching signals treatment circuit 15 of the touch sensing TS shown in Fig. 6, thereby is not limited to this.Thereby TSIC can be to comprise the many multi-form embodiment of TFT and holding capacitor.TSIC shown in Fig. 7 is connected to sense wire R1 to Ri.TSIC comprises operational amplifier OPamp, the first and second output on-off element SH0 and SH1, output buffer, analogue-to-digital converters (ADC), or the like.Reset switch element RST and feedback condenser Cfb are connected to noninverting entry terminal and the outlet terminal of operational amplifier OPamp.The reference voltage V 0 of 2V is supplied with the anti-phase entry terminal of operational amplifier OPamp.The differential amplification of operational amplifier OPamp is from output and the reference voltage of sense wire R1 to Ri, they are offered first and second output on-off element SH0 and the SH1.Before switching TFT Tsw conducting, the first output on-off element SH0 conducting, thereby output reference voltage V0.After switching TFT Tsw conducting, the second output on-off element SH1 conducting, thus output is through the touch sensing output voltage V 1 of sense wire R1 to Ri input.TSIC utilizes ADC to convert the differential voltage between reference voltage V 0 and the touch sensing output voltage V 1 to numerical data, numerical data is exported to control panel 50.
Fig. 8 and Fig. 9 illustrate the experiment apparatus and the touch data correcting circuit of the touch data that is connected to touch sensing deving.
Shown in Fig. 8 and 9, control panel 50 comprises time schedule controller 11 and touch data correcting circuit.Time schedule controller 11 is supplied with data drive circuit 12 with digital of digital video data, and controls the operation sequential of each data drive circuit 12 and scan drive circuit 13.In addition, the operation sequential of time schedule controller 11 control touching signals treatment circuits 15.
The touch data correcting circuit comprises adjustment of data unit 61, noise removing unit 62 and coordinates detection unit 63.The touch data correcting circuit can be separated with control panel 50, and can be installed in the inside of each TSIC.
Adjustment of data unit 61 is at the mirror image data of among the numerical data of each TSIC output, selecting to be used for each TSIC.Adjustment of data unit 61 utilizes mirror image data and the numerical data adjacent with this mirror image data to calculate the corrected value of the touch data of each TSIC, thereby proofreaies and correct the swing level of touch data and the output bias between the TSIC.Adjustment of data unit 61 calculates the quantity of the corrected value that is equal to, or greater than predetermined critical.If the quantity of corrected value is less than predetermined reference value, then adjustment of data unit 61 is confirmed as this corrected value the data of defective touch sensing and is removed this corrected value.Can predetermined off-set value be added on the said corrected value, said corrected value has the correction oscillation level in the output bias between the output of TSIC and touch sensing.Off-set value is added on the corrected value, thereby representes the correcting digital data with positive integer.The off-set value represented by positive integer is confirmed in available experiment, and can rely on contact sensitivity to be provided with to control it.
Noise removing unit 62 utilizes well-known noise remove algorithm to remove the noise in the output of sneaking into touch sensing.The effective contact position of numerical data conduct that is equal to or greater than predetermined threshold is surveyed in coordinates detection unit 63 among numerical data; And calculate the x-y coordinate figure of this effective contact position, the correction of the output bias between the said numerical data experience TSIC, the correction and the noise remove of swing level.
The experiment apparatus of touch data comprises interface board 51, computing machine 52 and the display 53 that is connected to control panel 50.The experiment apparatus of touch data is for seeing the device of the operation and the sensitivity of touch sensing through human eye.For this reason, this experiment apparatus becomes picture signal with the output conversion of signals of touch sensing, and this picture signal is presented on the display 53.Thereby the experiment apparatus of touch data can separate from control panel 50 after touch sensing deving and display device are accomplished.Interface board 51 utilizes the interface such as SPI (SPI), RS232 and I2C to be transferred to computing machine 52 from touch data and the coordinate figure that the touch data correcting circuit obtains.Interface board 51 inserts in peripheral cell interconnection (PCI) groove of computing machine 52.Computing machine 52 will be supplied with display 53 through the touch data of PCI groove input, and display 53 shows the touch data of supplying with through computing machine 52.
Figure 10 A illustrates an embodiment of the test figure that shows on the display panel 10.Figure 10 B is for being presented at 10 last times of display panel when the test figure shown in Figure 10 A, be presented at the TSIC on the display 53 output image catch photo.In this test figure, the white pattern of same size and the black pattern of same size replace on vertical and horizontal direction each other.When test figure is presented at 10 last times of display panel, shown in Figure 10 B, noise is owing to the electric coupling between display panel 10 and the touch sensing array 14 appears in the output of TSIC, and in this noise, the pattern of test figure looks like image retention.In addition, shown in Figure 10 B, the output level of adjacent TSIC is owing to the deviation between the adjacent TSIC differs from one another.In Figure 10 B, " defect line " expression produces the line of the defective output of touch sensing.Figure 11 is the three-dimensional graphics images of the output level of demonstration touch sensing.Like Figure 10 B and shown in Figure 11, much noise is sneaked in the output of touch sensing, thereby between TSIC, has big relatively output bias owing to the noise of touch sensing.In other words, shown in figure 12, the output of the data of touch sensing comprises noise section, by being presented at image and the coupling unit that produces on the display panel 10, deviation and the swing level between the TSIC.Thereby the sensitivity of touch sensing and precision are owing to this data output descends.
Figure 13 and 14 has been illustrated contact output and has not been put on the variation of touch data among the NTP during the noncontact of touch sensing array 14, and touch input puts on the variation of touch data among the period of contact TP of touch sensing array 14.
Shown in Figure 13 and 14; Touching signals treatment circuit 15 converts the predetermined reference voltage V0 of touch sensing and the differential voltage (V0-V1) between the output voltage V 1 to numerical data (promptly; Touching signals treatment circuit 15 is carried out analog-digital conversion), to produce touch data.If during noncontact, produce the reference voltage V 0 of 2.0V and the touch sensing output voltage V 1 of 2.5V among the NTP, then the differential voltage (V0-V1) of touching signals treatment circuit 15 general-0.5V converts digital value " 256 " to produce the output of touch sensing.Because the variation of touch sensing output voltage V 1 changes according to the contact pressure among the NTP during noncontact, so the differential voltage (V0-V1) between touching signals treatment circuit 15 generation-0.5V and the 0.0V is as the digital value between " 256 " and " 512 ".
Figure 15 to Figure 18 has illustrated first illustrative methods of the mirror image data that is used to produce adjustment of data unit 61.Among the touch data of 1 line of exporting simultaneously through the touch sensing of touch sensing array 14, select mirror image data.The touch data of 1 line is in the raw data that receives before proofreading and correct, and is the numerical data by the TSIC conversion.Mirror image data is pseudo-data.Differential operational will be carried out between touch data of exporting from touch sensing and mirror image data, and this touch sensing is arranged on the one side or the another side of touch-control sensing touch sensing array 14.The touch data of 1 line of exporting simultaneously through touch-control sensing touch sensing array 14 obtains proofreading and correct along the direction of unanimity, and this consistent direction is the output from the touch sensing that outputs to the another side that is arranged on touch sensing array 14 of the touch sensing on one side of being arranged on touch sensing array 14.Utilize the touch data of touch sensing and output that the differential operational result between the mirror image data proofreaies and correct the touch sensing on the one side that is arranged on touch sensing array 14, the output of perhaps proofreading and correct the touch sensing of the another side that is arranged on touch sensing array 14.
Each TSIC of touching signals treatment circuit 15 produces by the voltage V1 of the touch data of touch sensing input and the differential voltage between the predetermined reference voltage V0, and utilizes ADC to convert this differential voltage to numerical data.In first illustrative methods, to shown in Figure 180, following 4 kinds of situations are considered in adjustment of data unit 61 like Figure 15, as raw data the one RD of numerical data, the 2nd RD ... Select mirror image data among the N NRD.
Situation 1 (Figure 15)
When calculating following equality: the 2nd RD-the one RD=Δ 2; The 3rd RD-the 2nd RD=Δ 3 ..., and N RD-(N-1) RD=Δ N is (wherein; N is a positive integer) time; If Δ 2, Δ 3 ... All all are no more than predetermined reference value, and then adjustment of data unit 61 selects second raw data the 2nd RD that external conditions are similar to first raw data the one RD most as mirror image data, the positive integer value of said predetermined reference value for obtaining through experiment.Among the raw data of being exported simultaneously by the touch sensing array 14 in the preset lines, first raw data the one RD is the output of first touch sensing that is positioned at the left side of touch sensing array 14.Second raw data the 2nd RD is the output at second touch sensing on the right of first sensor.N raw data N RD is the output of N touch sensing.
Situation 2 (Figure 16)
When calculating following equality: the 2nd RD-the one RD=Δ 2; The 3rd RD-the 2nd RD=Δ 3 ... M RD-(M-1) RD=Δ M (wherein, M is the positive integer less than N) ... And during N RD-(N-1) RD=Δ N; If there is the differential values (that is, Δ M) that surpasses pre-determined reference value, then adjustment of data unit 61 relatively surpasses the quantity and the benchmark quantity of allowing of the differential values of reference value.When the quantity of the differential values that surpasses reference value during less than the benchmark quantity of allowing; Then the differential values above reference value is ignored in adjustment of data unit 61; And among the raw data of generation less than the differential values of reference value, second raw data the 2nd RD that selection external condition is similar to first raw data the one RD most is as mirror image data.Said reference value is served as reasons with the benchmark quantity of allowing and is tested the value that obtains, and it can change according to the touch sensing that in raw data extraction line, exists or the sensitivity setting of touch sensing.
Situation 3 (Figure 17)
When calculating following equality: the 2nd RD-the one RD=Δ 2, the three RD-the 2nd RD=Δ 3 ... MRD-(M-1) RD=M, (M+1) RD-(M-1) RD=Δ M+1, (M+2) RD-(M-1) RD=Δ M+2 ... And during NRD-(N-1) RD=Δ N, if continued presence surpasses a plurality of differential values (that is Δ M, of pre-determined reference value; Δ M+1, Δ M+2), then adjustment of data unit 61 relatively surpasses the quantity and the benchmark quantity of allowing of the differential values of reference value.When the quantity of the differential values that surpasses reference value during less than the benchmark quantity of allowing; The differential values above reference value is ignored in adjustment of data unit 61; And among the raw data of generation less than the differential values of reference value, second raw data the 2nd RD that selection external condition is similar to first raw data the one RD most is as mirror image data.This situation is the very little situation that zone of touch data is not thought of as contact area of quantity because of the touch data that surpasses reference value.
Situation 4 (Figure 18)
When calculating following equality: the 2nd RD-the one RD=Δ 2, the three RD-the 2nd RD=3 ... MRD-(M-1) RD=Δ M, (M+1) RD-M RD=Δ M+1, (M+2) RD-MRD=M+2 ... And during N RD-(N-1) RD=Δ N, if continued presence is with negative number representation and surpass a plurality of differential values (that is Δ M, of pre-determined reference value; Δ M+1, Δ M+2), then adjustment of data unit 61 relatively surpasses the quantity and the benchmark quantity of allowing of the differential values of reference value.When the quantity of the differential values that surpasses reference value is equal to or greater than the benchmark quantity of allowing; Quantity correcting unit 61 is confirmed as the zone around first touch sensing in the zone of actual touch formula input; And among raw data, the M raw data M RD that selection external condition is similar to first raw data the one RD most is as mirror image data.
Figure 19 illustrates first to the 3rd TSIC of the outlet terminal that is connected to touch sensing array 14.
Shown in figure 19; The quantity of the available passageway of the one TSIC TSIC#1 is N1; And a TSICTSIC#1 receives RD to the N1RD among the raw data of 1 line of exporting simultaneously from touch sensing array 14, and converts RD to the N1RD to numerical data.The quantity of the available passageway of the 2nd TSICTSIC#2 is N2; And the 2nd TSIC TSIC#2 receives (N1+1) RD to the (N1+N2) RD among the raw data of 1 line of exporting simultaneously from touch sensing array 14, and converts this (N1+1) RD to the (N1+N2) RD to numerical data.The quantity of the available passageway of the 3rd TSIC TSIC#3 is N3; And the 3rd TSIC TSIC#3 is among the raw data of 1 line of exporting simultaneously from touch sensing array 14; Receive (N1+N2+1) RD to the (N1+N2+N3), and convert (N1+N2+1) RD to the (N1+N2+N3) to numerical data.Each the quantity of available passageway of first to the 3rd TSICTSIC#1, TSIC#2 and TSIC#3 can change with the quantity and the resolution of touch sensing.
Figure 20 is illustrated in and carries out the corrected value that differential operational obtained shown in figure 15 on the touch data of Figure 10 B and 11.In Figure 20, " TSIC#1 mirror image data " is the mirror image data that utilizes a TSIC of method selection shown in figure 15, and " TSIC#2 mirror image data " is the mirror image data that utilizes the 2nd TSIC of method selection shown in figure 15.Adjustment of data unit 61 is through following equality: Δ 1=the one RD-TSIC#1 mirror image data calculates the correction value delta 1 of first raw data that receives from a TSIC.Then, adjustment of data unit is through following equality: Δ N1=N1RD-(N1-1) RD calculates each correction value delta N1 of second to N1 raw data receiving from a TSIC.Adjustment of data unit 61 is through following equality: Δ 1=the one RD-TSIC#2 mirror image data calculates the correction value delta 1 of first raw data that receives from the 2nd TSIC.Then, adjustment of data unit 61 is through following equality: Δ N2=N2RD-(N2-1) RD calculates each correction value delta N2 of second to N2 raw data receiving from the 2nd TSIC.As a result of, shown in figure 21, be corrected as the value of the reference level of representing near dotted line from the raw data of first and second TSIC output.As finding out from the corrected value shown in Figure 21, the swing horizontal component of raw data and the deviation between the TSIC partly are removed.
Shown in figure 22, data osculating element 61 calculates the quantity of the continuous correction value of the touch data that is equal to or greater than predetermined critical.If the quantity of continuous correction value that is equal to or greater than predetermined critical is less than predetermined reference value, then this corrected value is confirmed as the output of defective touch sensing in adjustment of data unit 61.The corrected value that adjustment of data unit 61 will be equal to or greater than predetermined critical multiply by zero, thereby removes the output of defective touch sensing.The result is, removed the output of defective touch sensing, such as the circle of Figure 23 demonstration.On the other hand, adjustment of data unit 61 will multiply by weighted value 1 less than the corrected value of predetermined critical.Be equal to or greater than pre-determined reference value if be equal to or greater than the quantity of the continuous correction value of predetermined critical, then adjustment of data unit 61 is on duty with weighted value 1 with continuous correction.In this case, this corrected value is thought the data of contact area.
Figure 24 is for illustrating through off-set value " 512 " being added to the result's who obtains on each corrected value of proofreading and correct through the bearing calibration of illustrating among Figure 15 to 23 three-dimensional graphics images.In Figure 24, among calibrated touch data, be equal to or greater than of the output of the touch data of predetermined critical for the touch sensing in the actual contact zone.Can find out that from Figure 24 the deviation that is included between noise, swing level and the TSIC in the contact area of Figure 11 partly is removed.
Figure 25 and 26 illustrates second illustrative methods that is used to produce mirror image data.In second illustrative methods, utilization is calculated mirror image data from the mean value of the raw data of 1 line of TSIC output, and utilizes the differential values between the adjacent raw data that adopts the mirror image data acquisition to proofread and correct this raw data.Calculate the mirror image data among each TSIC.That is, the quantity of mirror image data equals the quantity of TSIC.
The mirror image data of supposing a TSIC TSIC#1 is MD1; The mirror image data of the 2nd TSIC TSIC#2 is MD2; And the mirror image data of the 3rd TSIC TSIC#3 is MD3; Then through following equality: MD1=[SUM (RD to the N1RD)]/N1, MD2={SUM [(N1+1) RD to the (N1+N2) RD)] }/N2, MD3={SUM [(N1+N2+1) RD to the (N1+N2+N3) RD)] }/N3 calculates mirror image data MD1, MD2 and MD3.That is, utilize the mean value of raw data and calculate mirror image data.
The mirror image data of supposing a TSIC is MD1, and the mirror image data of the 2nd TSIC is MD2, and the mean value of the raw data above then utilizing calculates mirror image data MD1 and MD2.First raw data the one RD of the one TSIC is proofreaied and correct to through the differential values between the first mirror image data MD1 and first raw data the one RD is added to the value that obtains on the off-set value.Proofread and correct raw data according to the condition identical from 1 line drawing with Figure 25 and 26.
Shown in figure 25, if all differential values between the adjacent raw data comprise the differential values between mirror image data and first raw data the one RD; All be no more than predetermined critical value, then through following equality: Δ 1=MD1 (or MD2)-the one RD, Δ 2=the 2nd RD-the one RD ... And Δ N=N RD-(N-1) RD, with correction value delta 1, Δ 2;, Δ N is calculated as the differential values between the adjacent raw data.
Shown in figure 26; If at least one differential values between the adjacent raw data surpasses predetermined critical value; Then through following equality: Δ 1=MD1 (or MD2)-the one RD, Δ 2=the 2nd RD-the one RD ... Δ 6=the 6th RD-the 5th RD is calculated as the differential values that is equal to or less than predetermined critical the differential values between the adjacent raw data that is shown.On the other hand; Through following equality: Δ 7 (surpassing critical value)=the 7th RD-the 6th RD, Δ 8 (upgrading)=the 8th RD-the 6th RD, Δ 9 (upgrading)=the 9th RD-the 6th RD; Δ 12 (being equal to or less than critical value)=the 12 RD-the 6th RD, Δ 13=the 13 RD-the 12 RD calculates the differential values that surpasses predetermined critical.
As stated, if there is the differential values that surpasses predetermined critical, then, each differential values just upgrades the balanced datum data when being equal to or less than critical value.The raw data of these balanced datum data for just before the raw data that produces the differential values that surpasses predetermined critical, being close to.In Figure 26, the balanced datum data are the 6th RD.
Figure 27 illustrates the embodiment that utilizes the mean value calculation mirror image data MD between raw data the one RD to the eight RD.Figure 28 illustrates first correction value delta 1 of first raw data the one RD that the mirror image data MD that utilizes Figure 27 and the differential values between first raw data the one RD calculate, and illustrates correction value delta 2 to the Δ 8 that the differential values utilized between the raw data of illustrating among Figure 26 is calculated.Figure 29 illustrates through off-set value " 512 " being added to the correction of a final proof value that obtains on each correction value delta 1 to Δ 8 of Figure 28.In Figure 29, the data in the generation zone of dashed area demonstration actual touch formula input, and the remainder except dashed area shows the data in the noncontact zone.
Figure 30 is illustrated in to carry out and proofreaies and correct the raw data from first to the 6th line Y1 to Y6 of TSIC output before.Figure 31 illustrates the experimental result that obtains through the raw data of utilizing bearing calibration that Figure 26 to 29 illustrates to proofread and correct Figure 30.
Can find out that from Figure 31 the noise and the deviation between swing level and the TSIC that are included in the raw data of Figure 30 obtain proofreading and correct.Except the bearing calibration of illustrating among Figure 25 to 29; As stated; If the quantity of continuous correction value that is equal to or greater than predetermined critical, then will be equal to or greater than the corrected value of predetermined critical less than predetermined reference value and multiply by zero, so that remove the output of defective touch sensing.On the other hand, will multiply by weighted value 1 less than the corrected value of predetermined critical.Be equal to or greater than pre-determined reference value if be equal to or greater than the quantity of the continuous correction value of predetermined critical, then that continuous correction is on duty with weighted value 1.
As stated; According to the touch sensing deving of embodiment of the present invention and the method that is used for proofreading and correct the output of touch sensing deving; Utilize adjacent touch data and mirror image data to calculate the corrected value of touch data, and the output of defective touch sensing is removed from corrected value.Therefore, the output bias between the noise of touch data and level of displacement and the TSIC obtains proofreading and correct.
Any reference to " embodiment ", " embodiment ", " embodiment " etc. in this instructions is meant special characteristic, structure or the characteristic that comprises this embodiment description of combination at least one embodiment of the present invention.This phrase occurring in the instructions many places needn't be all with reference to identical embodiment.In addition, when combining any embodiment to describe special characteristic, structure or characteristic, think that it combines other embodiment to realize in the scope of this characteristic, structure or characteristic those skilled in the art.
Although described the present invention, should understand those of ordinary skills and in spirit and scope principle, can expect many other modifications and embodiment at present disclosure with reference to some illustrative embodiments of the present invention.More specifically, multiple change and the modification to ingredient and/or main body layout is possible in present disclosure, accompanying drawing and accompanying claims scope.Except to the change of ingredient and/or layout and revising, other application that substitutes also is conspicuous to those skilled in the art.

Claims (20)

1. touch sensing deving comprises:
The touch sensing array that comprises a plurality of touch sensings;
A plurality of integrated circuit (IC) convert the output of touch sensing array numerical data to and produce raw data; And
Adjustment of data unit; Utilize the differential values between the adjacent raw data in the raw data that produces through IC to produce corrected value; And, from said corrected value, remove the continuous correction value that is equal to or greater than predetermined critical when the quantity of the continuous correction value that is equal to or greater than predetermined critical during less than pre-determined reference value.
2. the described touch sensing deving of claim 1, wherein, said adjustment of data unit is added to off-set value on each corrected value.
3. the described touch sensing deving of claim 1, wherein, it is inner that said touch sensing is formed on the pel array of display panel.
4. the described touch sensing deving of claim 3, wherein, said display panel is the panel display board of one of LCD, electroluminescent display, plasma scope and electroluminescent display.
5. the described touch sensing deving of claim 1, wherein, said adjustment of data unit produces mirror image data in each IC, between the said mirror image data and first raw data, carries out differential operational,
Wherein, among the raw data of each IC output, select to be used for the mirror image data of each IC.
6. the described touch sensing deving of claim 5, wherein, when all differential values between the adjacent raw data were equal to or less than predetermined critical, adjustment of data unit selected second raw data adjacent with first raw data as mirror image data.
7. the described touch sensing deving of claim 5; Wherein, If among the differential values between the adjacent raw data, exist to surpass the differential values of predetermined critical, then said adjustment of data unit relatively surpasses the quantity of the differential values of predetermined critical and allows benchmark quantity with predetermined
Wherein, allow benchmark quantity if surpass the quantity of the differential values of predetermined critical less than predetermined, then adjustment of data unit selects second raw data adjacent with first raw data as mirror image data.
8. the described touch sensing deving of claim 5; Wherein, If among the differential values between the adjacent raw data; Continued presence is with a plurality of differential values that surpass predetermined critical of negative number representation, and then adjustment of data unit relatively surpasses the quantity and the benchmark quantity of allowing of the differential values of predetermined critical
Wherein, Be equal to, or greater than the benchmark quantity of allowing if surpass the quantity of the differential values of predetermined critical; Then the raw data of first raw data is selected to be similar to most in adjustment of data unit among the raw data of generation with the continuous differential values that surpasses predetermined critical of negative number representation, as mirror image data.
9. the described touch sensing deving of claim 1, wherein, said adjustment of data unit produces mirror image data in each IC, and between the said mirror image data and first raw data, carries out differential operational,
Wherein, the mirror image data with each IC is calculated as from the mean value of the raw data of each IC output.
10. the described touch sensing deving of claim 5; Wherein, Said adjustment of data unit deducts said mirror image data from first raw data of touch sensing output; Calculating the corrected value of first raw data, and utilize differential values between the adjacent raw data to calculate the corrected value of all the other raw data except first raw data
Wherein, said adjustment of data unit will confirm that the off-set value of being represented by positive integer be added on each corrected value with experiment.
11. the described touch sensing deving of claim 9; Wherein, Said adjustment of data unit deducts said mirror image data from first raw data of touch sensing output; Calculating the corrected value of first raw data, and utilize differential values between the adjacent raw data to calculate the corrected value of all the other raw data except first raw data
Wherein, said adjustment of data unit will confirm that the off-set value of being represented by positive integer be added on each corrected value with experiment.
12. the described touch sensing deving of claim 1, wherein, said adjustment of data unit is on duty with zero less than continuous correction pre-determined reference value, that be equal to or greater than predetermined critical with quantity,
Wherein, said adjustment of data unit is on duty with 1 with the continuous correction that quantity is equal to or greater than pre-determined reference value.
13. a method that is used to proofread and correct the output of touch sensing deving comprises:
Through being connected to a plurality of integrated circuit (IC) of a plurality of touch sensings, convert the output of a plurality of touch sensings to numerical data, to produce raw data;
Utilize the differential values between the adjacent raw data in the raw data that produces through IC, produce corrected value; And
When the quantity of the continuous correction value that is equal to or greater than predetermined critical during, from corrected value, remove the continuous correction value that is equal to or greater than predetermined critical less than pre-determined reference value.
14. the described method of claim 13 further comprises off-set value is added on each corrected value.
15. the described method of claim 13, wherein, said generation corrected value is included among each IC and produces mirror image data, and between the said mirror image data and first raw data, carries out differential operational,
Wherein, from the raw data of each IC output, select to be used for the mirror image data of each IC.
16. the described method of claim 15, wherein, said generation mirror image data comprises:
If among the differential values between the adjacent raw data, continued presence then relatively surpasses the quantity and the benchmark quantity of allowing of the differential values of predetermined critical with a plurality of differential values that surpass predetermined critical of negative number representation, and
Be equal to or greater than the benchmark quantity of allowing if surpass the quantity of the differential values of predetermined critical; Then among the raw data that produces continuous differential values; Select with negative number representation and above the raw data that is similar to most first raw data of predetermined critical, as mirror image data.
17. the described method of claim 13, wherein, said generation corrected value comprises the mirror image data that produces first raw data be used for proofreading and correct each IC,
The mirror image data that wherein, will be used for each IC is calculated as from the mean value of the raw data of each IC output.
18. the described method of claim 15, wherein, said generation corrected value comprises:
Deduct mirror image data from first raw data of touch sensing output, calculating the corrected value of first raw data, and
Utilize the differential values between the adjacent raw data, calculate the corrected value of all the other raw data except first raw data.
19. the described method of claim 17, wherein, said generation corrected value comprises:
Deduct mirror image data from first raw data of touch sensing output, to calculate the corrected value of first raw data; And
Utilize the differential values between the adjacent raw data, calculate the corrected value of all the other raw data except first raw data.
20. the described method of claim 13, wherein, the said removal that is equal to or greater than the continuous correction value of predetermined critical comprises:
Quantity is on duty with zero less than continuous correction pre-determined reference value, that be equal to or greater than predetermined critical; And
The continuous correction that quantity is equal to or greater than pre-determined reference value is on duty with 1.
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