CN203480454U - Detection device of touch panel - Google Patents
Detection device of touch panel Download PDFInfo
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- CN203480454U CN203480454U CN201320445000.3U CN201320445000U CN203480454U CN 203480454 U CN203480454 U CN 203480454U CN 201320445000 U CN201320445000 U CN 201320445000U CN 203480454 U CN203480454 U CN 203480454U
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Abstract
The utility model relates to the technical field of touch control and provides a detection device of a touch panel. The detection device comprises a detection unit for detecting and outputting a plurality of output voltages generated by the touch panel, a compensation unit which is electrically connected with the detection unit and is used for getting default compensation voltages for the output voltages, compensating the compensation voltages to the corresponding output voltages and outputting calculation voltages after compensation respectively, and a calculation unit which is electrically connected with the compensation unit and is used for judging a touch position according to the calculation voltages.
Description
Technical field
The utility model relates to touch technology field, particularly relevant for a kind of pick-up unit of contact panel.
Background technology
Known contact panel, its structure for being distributed with at least one sensing unit on a substrate, and those sensing units are connected with a pick-up unit by least one wire.Wherein respectively this sensing unit is distinguished a corresponding coordinate figure, and this coordinate figure and corresponding relation thereof are stored in pick-up unit.
The detection method of this kind of contact panel is: when this sensing unit is subject to touching, produce a touching signals, show as a magnitude of voltage, pick-up unit sees through the respectively voltage on this sensing unit of respectively this wire detecting, when this voltage value receiving is greater than the threshold value of a setting, be judged to be this sensing unit and touched, the coordinate figure of touch points is the coordinate figure that this sensing unit is corresponding.Yet because each conductor length is not identical, therefore the resistance value of each wire is not identical, in the process that each touching signals is sent to pick-up unit by each sensing unit, the degree being decayed is different, between the actual voltage value that each magnitude of voltage that pick-up unit detects produces from each sensing unit, show different gaps, and then causing the threshold value set inaccurate, the result that pick-up unit goes out by this threshold decision and physical presence deviation, affect the usefulness of contact panel.
Utility model content
Because the attenuation degree of touching signals is variant, pick-up unit passing threshold there will be the situation getting the wrong sow by the ear while judging, a kind of pick-up unit of contact panel is provided for addressing this problem the utility model, this pick-up unit comprises: a detecting unit, detect and export the plural output voltage that contact panel produces; One compensating unit, is electrically connected this detecting unit, obtains a bucking voltage of acquiescence for this output voltage respectively, and this bucking voltage is respectively compensated to this output voltage in correspondence, and the calculating voltage after output compensation respectively; And a computing unit, be electrically connected this compensating unit, according to this calculating voltage, judge a touch position.
Further, more comprise a storage element, store this bucking voltage, wherein this storage element is connected with this compensating unit, and this compensating unit obtains this bucking voltage from this storage element.
Further, more comprise one first judging unit, this first judging unit is connected with this detecting unit, receive this output voltage, judge whether this output voltage is greater than a first threshold, and reject this output voltage that is not more than this first threshold, this output voltage that only output is greater than this first threshold is to this compensating unit.
Further, more comprise one second judging unit, this second judging unit is connected with this compensating unit, receive this calculating voltage, judge whether this calculating voltage is more than or equal to a Second Threshold, and reject this calculating voltage that is less than this Second Threshold, this calculating voltage that only output is more than or equal to this Second Threshold is to this computing unit.
According to the pick-up unit of contact panel that the utility model provides, each sensing unit on touch control induction device is carried out to corresponding signal compensation, so that pick-up unit more approaches actual signal for calculating the signal value of touch points, thereby avoiding occurring causes because of signal attenuation coarse problem that detects.
Accompanying drawing explanation
Figure 1A illustrates the contact panel of the utility model the first preferred embodiment;
Figure 1B illustrates the sensing unit structure of the contact panel of the utility model one embodiment;
Fig. 1 C illustrates the sensing unit structure of the contact panel of the utility model one embodiment;
Fig. 2 illustrates detection method flow process of the present utility model;
Fig. 3 illustrates the acquisition methods of average current in the utility model;
Fig. 4 illustrates the better detection method flow process of the utility model the utility model one;
Fig. 5 illustrates another better detection method flow process of the utility model;
Fig. 6 illustrates the structure of the detecting device of the utility model;
Fig. 7 illustrates the structure of the detecting device of the utility model one preferred embodiment.
[primary clustering symbol description]
20: detecting unit
30: compensating unit
31: storage unit
40: computing unit
50: the first judging units
60: the second judging units
100: contact panel
110: substrate
122: sensing unit
123: sensing unit
124: sensing unit
1241: the first axial electrode
1242: the second axial electrode
136: wire
140: pick-up unit
S1～S6: step
Embodiment
For making to have the knack of under the utility model skill person as one of technical field, can further understand the utility model, below spy enumerates the preferred embodiment of the utility model, and coordinate appended graphicly, describe constitution content of the present utility model in detail and the effect reached is wanted by institute.
For convenience of description, each of the utility model is graphic only for signal is to be easier to understand the utility model, and its detailed ratio can be adjusted according to the demand of design.Description is for the upper and lower relation of relative component in figure in the text, people in this area all will be understood that the relative position that it means object, therefore all can overturn and present identical member, this all should belong to the scope that this instructions discloses together, in this appearance, first chats bright.
Refer to Figure 1A, Figure 1A illustrates the contact panel of the utility model the first preferred embodiment, as shown in Figure 1A, contact panel 100 includes a substrate 110, on substrate 110, be laid with a plurality of separate sensing units 122, the better matrix that presents of each sensing unit 122 is arranged, in order more to clearly demonstrate, in the present embodiment, according to the position of each sensing unit 122, give respectively different numberings, for example the first row first row is numbered R1C1, the second row first row is numbered R2C1 etc., each sensing unit 122 is connected to pick-up unit 140 by plural wires 136 respectively, when user touches contact panel, the sensing unit of being touched will produce a touching signals, this touching signals can show as a magnitude of voltage, but also can be other forms, touching signals is sent to pick-up unit 140 by wire 136, each sensing unit 122 is a corresponding coordinate position respectively, the touching signals that pick-up unit 140 can send by reception sensing unit 122, judge user's coordinate corresponding to touch points.What deserves to be explained is, in Figure 1A, pick-up unit 140 is for being independent of contact panel setting, but the utility model is not limited to this, and pick-up unit 140 can be also the internal processor being set directly on contact panel.
In the embodiment that Figure 1A illustrates, the structure of contact panel 100 can be applicable to piezoelectric type contact panel, when contact panel 100 is piezoelectric type contact panel, and 122 graphic structures for the formation of use piezoelectric of sensing unit.Sensing unit structure that it should be noted that contact panel described in the utility model is not limited to this, can also be single shaft electrode structure, or twin shaft electrode structure, refers to Figure 1B and Fig. 1 C.
Figure 1B illustrates the sensing unit structure of the contact panel of another embodiment of the utility model, as shown in Figure 1B, the sensing unit structure of the contact panel of this enforcement and the difference of a upper embodiment are, a plurality of sensing units 123 are list structure, along a unified direction, walk abreast and arrange independently of each other, each sensing unit 123 can be expressed as a strip electrode axle, a corresponding axial coordinate.
Fig. 1 C illustrates the sensing unit structure of the contact panel of another embodiment of the utility model, as shown in Figure 1 C, the sensing unit structure of the contact panel of this enforcement and the difference of the first embodiment are, a plurality of sensing units 124 are list structure, part walks abreast and arranges independently of each other along a first direction, to form the first axial electrode 1241, another part walks abreast and arranges independently of each other along a second direction, to form the second axial electrode 1242, wherein, between the first axial electrode and the second axial electrode, pass through an insulation layer structure mutually insulated.
As discussed previously, touching signals can be decayed in the process by wire transmission, and the length of each wire is not identical, and the attenuation degree that each touching signals occurs is just not identical, thereby cause touching signals and former actual signal that pick-up unit receives to have gap, affect judged result.
For addressing the above problem, the utility model provides a kind of detection method of contact panel, refers to touch panel structure provided and Fig. 2 of Figure 1A, and Fig. 2 illustrates the contact panel detection method flow process of the utility model.Detection method is specific as follows:
Step S1, the output voltage that detecting produces from each sensing unit 122.Pick-up unit 140 is every a setting-up time, the touching signals that reception produces from each sensing unit 122, this touching signals shows as an output voltage in the present embodiment, what deserves to be explained is, touching signals also can be defined as an electric current or electric capacity, and the utility model is not limited to this.Wherein, the mode that pick-up unit 140 receives touching signals can be the mode of Time share scanning, can be also the mode simultaneously receiving, and the utility model is not as limit.
Step S2, obtains the bucking voltage that each sensing unit 122 is given tacit consent to.Please referring again to the 1st figure, take one of them sensing unit R1C1 is example, after sensing unit R1C1 is touched, produces output voltage and detected device 140 receives.Pick-up unit 140 receives after the output voltage of sensing unit R1C1, extracts acquiescence to the bucking voltage of sensing unit R1C1.
Step S3, compensates this bucking voltage respectively in corresponding output voltage, and the calculating voltage after output compensation respectively.By step S2, get after the bucking voltage of sensing unit R1C1, with this bucking voltage, the output voltage of sensing unit R1C1 is compensated, after compensation, obtain the calculating voltage of sensing unit R1C1.
Wherein, the bucking voltage corresponding with sensing unit R1C1, for being stored in the default value in pick-up unit 140.Bucking voltage be an average current with the product of a resistance wherein resistance value for being connected the resistance of the wire L1 of sensing unit R1C1 and pick-up unit 140; Average current is for calculating by experiment gained, and its concrete acquisition methods is as follows:
Please refer to Fig. 3, Fig. 3 illustrates the acquisition methods of average current in the utility model.First, make sensing unit R1C1 produce touching signals, this touching signals transfers to pick-up unit 140 by wire L1, and produces the first voltage V1 and second voltage V2.The method that wherein touching signals produces can be real user touching sensing unit R1C1, or other any meetings make sensing unit R1C1 produce the method for emulation touching signals, and the utility model is not limited to the method for touching signals generation; The first voltage V1 is the voltage that end points place that touching signals is connected with sensing unit R1C1 in wire L1 shows, second voltage V2 is the voltage that end points place that touching signals R1C1 is connected with pick-up unit 140 in wire L1 shows, as can be seen here, the first voltage V1 is the voltage that the touching signals of sensing unit R1C1 actual generation when being subject to touch-control shows, second voltage V2 is that touching signals is subject to the voltage of decaying and showing afterwards, the voltage that pick-up unit 140 receives by wire L1.
Then, measure the resistance R 1 of the first voltage V1 and second voltage V2 and wire L1, according to the numerical value of the numerical value of the numerical value of the first voltage V1, second voltage V2 and resistance R 1, calculate by the numerical value of the current i 1 of wire L1, the numerical value of current i 1 can be calculated by nurse law difficult to understand again:
V2=V1-i1R1, so i1=(V1-V2)/R1
Repeat above-mentioned step, repeatedly calculate the current i 1 of sensing unit R1C1, obtain a plurality of current i 1 data, then with an average evaluation method, calculate the mean value i1avg of each current i 1.
The computing method that the utility model provides are average by many group current i 1 data, calculate the average i1avg of electric current of gained, more approach user under general status and touch after sensing unit R1C1, the size of current of the wire L1 that flows through.
Obtain after the average current i1avg of sensing unit R1C1, by the average current i1avg of sensing unit R1C1 and the resistance R 1 of wire L1, multiply each other, obtain the bucking voltage VCOM corresponding to sensing unit R1C1, bucking voltage VCOM is touching signals that sensing unit R1C1 the produces pad value on wire L1.
By said method, obtain respectively the corresponding bucking voltage of each sensing unit 122, then each bucking voltage is stored in pick-up unit 140, for corresponding sensing unit compensation is used.
Referring again to Fig. 2, the detection method of the utility model, after step S3, also comprises step S4, according to each calculating voltage, determines touch position.The method of wherein determining touch position can be, and first each calculating voltage is carried out to digital-to-analog conversion, obtains corresponding signal data, compare with the threshold value of acquiescence again, thereby filter out valid data, according to the corresponding coordinate figure of finite data, to obtain true position of touch.It should be noted that the definite touch position method in the utility model can be additive method, be not limited to this.
Because pick-up unit 140 is when receiving the touching signals being sent by each touch-control sensing unit 122, for the mode all receiving, be that pick-up unit 140 can carry out signal reception to each touch-control sensing unit 122, thus, if follow-up, whole reception signals is all compensated, expend the time of calculating compared with multiprocessing, therefore in a preferred embodiment, please refer to Fig. 4, Fig. 4 illustrates the better detection method flow process of the utility model one, be with a upper embodiment difference, between detecting step S1 and compensation process S2, more comprise step S5, judge whether output voltage is greater than a first threshold, if output voltage is not more than automatic rejection output voltage of this first threshold, not follow-up will can operation these disallowable output voltages, thereby save detection time.Wherein, first threshold can be 0, or for contact panel is not while being subject to any touching, the minimum value in the output voltage of all sensing units.What deserves to be explained is, in other embodiment of the present utility model, after as long as step S5 is positioned at step S1, in other words, step S5 can carry out with step S2 simultaneously simultaneously, or be positioned at thereafter, the order that the order of its execution is not restricted to describe in the present embodiment, but can adjust according to different control processing modes.
Further, please refer to Fig. 5, Fig. 5 illustrates another better detection method flow process of the utility model, the difference of the present embodiment and a upper embodiment is, between compensation process S3 and calculation procedure S4, more comprise a step S6, judge whether calculating voltage is greater than a Second Threshold, if calculating voltage is not more than this calculating voltage of automatic rejection of this Second Threshold.By the method for the present embodiment, can further reduce the semaphore that follow-up need calculate judgement, thereby save detection time.Identical with a upper embodiment, in other embodiment of the present utility model, after as long as step S6 is positioned at step S3, in other words, step S6 can carry out with step S4 simultaneously simultaneously, or be positioned at thereafter, the order that the order of its execution is not restricted to describe in the present embodiment, but can adjust according to different control processing modes.
In sum, detection method provided by the utility model, produces decay in the time of can avoiding passing through wire 136 because of output touching signals, and pick-up unit 140 mistakes are judged to be the situation of noise, can obtain more accurate testing result.
The utility model also provides a kind of pick-up unit of contact panel, please refer to Fig. 6, and Fig. 6 illustrates the structure of the detecting device of the utility model.The pick-up unit 140 of contact panel comprises: detecting unit 20, and compensating unit 30 and computing unit 40, wherein detecting unit 20 is electrically connected with compensating unit 30, and compensating unit 30 is electrically connected with computing unit 40.
Detecting unit 20 at set intervals, receives each output voltage from contact panel, and output is by those output voltages; Compensating unit 30 receives each output voltage of detecting unit 20 outputs, each output voltage is compensated to the bucking voltage of adding corresponding acquiescence to each output voltage, and output each calculating voltage after over-compensation; Each calculating voltage that computing unit 40 receives from compensating unit 30, and determine touch position according to those calculating voltages.Wherein bucking voltage is stored in a storage unit 31, and wherein storage unit 31 is electrically connected with compensating unit 30, and compensating unit 30, when carrying out compensation, directly obtains the bucking voltage that each unit is corresponding from storage unit 31.
In a preferred embodiment, please refer to Fig. 7, Fig. 7 illustrates the structure of the detecting device of the utility model one preferred embodiment, and the present embodiment and upper one difference of implementing are, more comprise the first judging unit 50.The first judging unit 50 is arranged between detecting unit 20 and compensating unit 30, be that detecting unit 20 and the first judging unit 50 are electrically connected, the first judging unit 50 is electrically connected with compensating unit 30, after being received by detecting unit 20 from each output voltage of contact panel, and by its output; The first judging unit 50 receives each output voltage of detecting unit 20 outputs, and itself and a first threshold are compared, if output voltage is greater than first threshold, exported, otherwise by its rejecting; The output voltage that compensating unit 30 receives from the first judging unit 50, compensates operation to each output voltage, and output each calculating voltage after over-compensation; Each calculating voltage that computing unit 40 receives from compensating unit 30, and determine touch position according to those calculating voltages.
In above-described embodiment, pick-up unit 140 can also comprise one second judging unit 60, and compensating unit 30 is connected with computing unit 40 by the second judging unit.The second judging unit 60 receives the calculating voltage of compensating unit 30 outputs, judges whether calculating voltage is more than or equal to Second Threshold, and the calculating voltage that is less than Second Threshold is rejected, and the calculating voltage that output is more than or equal to Second Threshold is to computing unit 40.Thus, can further reduce the semaphore that follow-up need calculate judgement, thereby save detection time.
The foregoing is only the preferred embodiment of the utility model, all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model.
Claims (4)
1. a pick-up unit for contact panel, is characterized in that, this pick-up unit comprises:
One detecting unit, detects and exports the plural output voltage that contact panel produces;
One compensating unit, is electrically connected this detecting unit, obtains a bucking voltage of acquiescence for this output voltage respectively, and this bucking voltage is respectively compensated to this output voltage in correspondence, and the calculating voltage after output compensation respectively; And
One computing unit, is electrically connected this compensating unit, according to this calculating voltage, judges a touch position.
2. pick-up unit as claimed in claim 1, is characterized in that, more comprises a storage element, stores this bucking voltage, and wherein this storage element is connected with this compensating unit, and this compensating unit obtains this bucking voltage from this storage element.
3. pick-up unit as claimed in claim 1, it is characterized in that, more comprise one first judging unit, this first judging unit is connected with this detecting unit, receive this output voltage, judge whether this output voltage is greater than a first threshold, and reject this output voltage that is not more than this first threshold, this output voltage that only output is greater than this first threshold is to this compensating unit.
4. the pick-up unit as described in claim 1 or 3, it is characterized in that, more comprise one second judging unit, this second judging unit is connected with this compensating unit, receive this calculating voltage, judge whether this calculating voltage is more than or equal to a Second Threshold, and reject this calculating voltage that is less than this Second Threshold, this calculating voltage that only output is more than or equal to this Second Threshold is to this computing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445000.3U CN203480454U (en) | 2013-07-24 | 2013-07-24 | Detection device of touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320445000.3U CN203480454U (en) | 2013-07-24 | 2013-07-24 | Detection device of touch panel |
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| Publication Number | Publication Date |
|---|---|
| CN203480454U true CN203480454U (en) | 2014-03-12 |
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| CN201320445000.3U Expired - Fee Related CN203480454U (en) | 2013-07-24 | 2013-07-24 | Detection device of touch panel |
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| CN (1) | CN203480454U (en) |
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- 2013-07-24 CN CN201320445000.3U patent/CN203480454U/en not_active Expired - Fee Related
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Granted publication date: 20140312 Termination date: 20180724 |