CN101859217B - Capacitor-type touch panel and ghost point judging method - Google Patents
Capacitor-type touch panel and ghost point judging method Download PDFInfo
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- CN101859217B CN101859217B CN2010102033887A CN201010203388A CN101859217B CN 101859217 B CN101859217 B CN 101859217B CN 2010102033887 A CN2010102033887 A CN 2010102033887A CN 201010203388 A CN201010203388 A CN 201010203388A CN 101859217 B CN101859217 B CN 101859217B
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Abstract
The invention relates to a capacitor-type touch panel and a ghost point judging method. The capacitor-type touch panel comprises a touch sensing plate and a touch sensing module, wherein the touch sensing plate comprises a plurality of sensing units which are arranged along a first direction and a second direction to form an array, the capacitance values of the sensing units are gradually reduced along the first direction, and the touch sensing module is coupled with the touch sensing plate for sensing at least two practical touch points.
Description
Technical field
The invention relates to a kind of ghost point judging technology, and particularly technological relevant for a kind of ghost point judging of capacitor-type touch panel.
Background technology
Fast development and application along with infotech, wireless mobile communication and information household appliances; For reach carry more convenient, volume is more lightly changed and operate more humane purpose; Many information products change into and use contact surface plate (Touch Panel) as input media by input medias such as the keyboard of tradition or mouses.
At present, but contact surface plate mainly sub-resistance formula, condenser type, acoustic wave, optical profile type etc.What deserves to be mentioned is that in known technology, capacitor-type touch panel is when 2 touchings of detecting, the problem that has ghost point (Ghost point) can't be solved.
Fig. 1 is the ghost point synoptic diagram of known a kind of capacitor-type touch panel.Please, when two touch points are P1, P4,, and produce corresponding ghost point coordinate, i.e. P2, P3 at the diagonal angle of practical touch point because of the multipoint sensing coordinate signal can't correctly make up reduction with reference to Fig. 1; Otherwise when two touch points were P2, P3, capacitor-type touch panel likewise can detect system and judge touch points P1～P4, comprises practical touch point P2, P3 and ghost point P1, P4.Therefore, capacitor-type touch panel can't judge that touch points P1～P4 determines real two touch points from system.
Summary of the invention
The present invention provides a kind of capacitor-type touch panel, can the improvement system judges the problem of touch points.
The present invention provides a kind of ghost point judging method, and when 2 touchings, system can judge that touch points obtains two practical touch points from four systems.
The present invention proposes a kind of capacitor-type touch panel, and it comprises touch detection plate and touch detection module.The touch detection plate comprises a plurality of detecting units.Above-mentioned detecting unit is arranged to form an array along first direction and second direction.Above-mentioned detecting unit is the electric capacity kenel.The capacitance of above-mentioned detecting unit successively decreases along first direction.The touch detection module couples the touch detection plate, in order to detecting at least two practical touch point.
In one embodiment of this invention, the capacitance of above-mentioned detecting unit remains unchanged along second direction.
In one embodiment of this invention; When detecting four systems judgement touch points; In regular turn above-mentioned detecting unit is detected along second direction; To detect first responsibility cycle and second responsibility cycle in regular turn, judge from above-mentioned four systems according to the size of first responsibility cycle and second responsibility cycle again to obtain two practical touch points the touch points.
In one embodiment of this invention, the touch detection module comprises a plurality of PWM signal generators and touch points judgement module.Above-mentioned PWM signal generator couples above-mentioned detecting unit respectively.Suppose that above-mentioned two practical touch points fall within first detecting unit and second detecting unit of above-mentioned detecting unit; First detecting unit and second detecting unit correspond respectively to the first PWM signal generator and the second PWM signal generator of above-mentioned PWM signal generator, and the first PWM signal generator and the second PWM signal generator are arranged along second direction in regular turn.The first PWM signal of first PWM signal generator output correspondence is earlier followed the second PWM generator and can be exported the second corresponding PWM signal more in the case.The responsibility cycle of the first PWM signal and the second PWM signal is determined by the capacitance of first detecting unit and second detecting unit respectively.Touch points judges that module couples above-mentioned PWM signal generator; Can receive the first PWM signal and the second PWM signal in regular turn; And the size of the responsibility cycle of the foundation first PWM signal and the second PWM signal, judge above-mentioned two the practical touch points of acquisition the touch points from above-mentioned four systems.
In one embodiment of this invention, above-mentioned four systems judges that touch points forms a rectangle.Above-mentioned four systems judges that touch points is respectively first system judgement touch points, touch points, tertiary system system judgement touch points and Quaternary system system judgement touch points are judged by second system.First system judges that touch points and Quaternary system system judgement touch points are positioned at a diagonally opposing corner of rectangle.Second system judges that touch points and tertiary system system judgement touch points are positioned at another diagonally opposing corner of rectangle.Suppose first system judge touch points along first direction and second direction move all can towards Quaternary system system judgement touch points near.If first responsibility cycle is greater than second responsibility cycle, first system judges that touch points and Quaternary system system judgement touch points are above-mentioned two practical touch points.If first responsibility cycle is less than second responsibility cycle, second system judges that touch points and tertiary system system judgement touch points are above-mentioned two practical touch points.
In one embodiment of this invention, first direction is vertical with second direction.In other words, first direction is a transverse axis, and second direction is a Z-axis.Perhaps, first direction is a Z-axis, and second direction is a transverse axis.
In one embodiment of this invention, be positioned at each detecting unit of above-mentioned two practical touch points, its capacitance can rise.
From another angle, the present invention proposes a kind of ghost point judging method, is applicable to capacitor-type touch panel.Capacitor-type touch panel comprises touch detection plate and touch detection module.The touch detection plate comprises a plurality of detecting units.Above-mentioned detecting unit is arranged to form an array along first direction and second direction.First direction is vertical with second direction.Above-mentioned detecting unit is the electric capacity kenel.The capacitance of above-mentioned detecting unit successively decreases along first direction.Ghost point judging method comprises when detecting four systems judgement touch points, in regular turn above-mentioned detecting unit is detected along second direction, to detect first responsibility cycle and second responsibility cycle in regular turn.In addition, judge two practical touch points of acquisition the touch points according to the size of first responsibility cycle and second responsibility cycle from above-mentioned four systems.
Based on above-mentioned, among the present invention, the capacitance of a plurality of detecting units successively decreases along first direction.When four systems judgement touch points takes place, can the edge second direction vertical in regular turn detecting unit be detected, to obtain one first responsibility cycle and second responsibility cycle in regular turn with first direction.Then again according to the size of first responsibility cycle and second responsibility cycle, can judge that touch points judges two practical touch points from four systems.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the ghost point synoptic diagram of known a kind of capacitor-type touch panel.
Fig. 2 A and Fig. 2 B are the synoptic diagram according to a kind of capacitor-type touch panel of one embodiment of the invention.
Fig. 3 is the process flow diagram according to a kind of ghost point judging method of one embodiment of the invention.
Fig. 4 is the synoptic diagram according to a kind of capacitor-type touch panel of another embodiment of the present invention.
Fig. 5 A and Fig. 5 B are the synoptic diagram according to a kind of capacitor-type touch panel of one embodiment of the invention.
Embodiment
Known capacitor-type touch panel has the problem of ghost point.
Review, embodiments of the invention have disposed a plurality of detecting units in capacitor-type touch panel.Detecting unit is arranged to form an array along first direction and second direction.First direction is vertical with second direction.The capacitance of detecting unit successively decreases along first direction.When four systems judgement touch points takes place, can detect above-mentioned detecting unit in regular turn along second direction, to obtain first responsibility cycle (duty cycle) and second responsibility cycle in regular turn.Then again according to the size of first responsibility cycle and second responsibility cycle, can judge that touch points judges two practical touch points from four systems.Set forth embodiments of the invention in detail below with reference to accompanying drawing, the for example clear example embodiment of the present invention of accompanying drawing, the wherein same or similar step of same numeral indication.
Fig. 2 A and Fig. 2 B are the synoptic diagram according to a kind of capacitor-type touch panel of one embodiment of the invention.Fig. 3 is the process flow diagram according to a kind of ghost point judging method of one embodiment of the invention.Please merge with reference to Fig. 2 A, Fig. 2 B and Fig. 3, capacitor-type touch panel 10 comprises touch detection plate 20 and touch detection module 30.Touch detection plate 20 comprises a plurality of detecting units 40.In the present embodiment, detecting unit 40 is the condenser type kenel.Touch detection module 30 couples touch detection plate 20.
At first can a plurality of detecting units 40 be provided by step S 301.Detecting unit 40 is arranged along direction X and direction Y, to form an array.Direction X is vertical with direction Y.Detecting unit 40 is the electric capacity kenel.In the present embodiment, the capacitance of each detecting unit 40 successively decreases along direction X, and the capacitance of detecting unit 40 is along direction Y remain unchanged (like Fig. 2 A and Fig. 2 B).The capacitance that note that detecting unit 40 is directly proportional with the area of its tablet.The area that in the present embodiment, can change the tablet of each detecting unit is realized the detecting unit of different capacitances.For instance, the H that can on the tablet of detecting unit 40, dig a hole.Hole H is bigger, and the area of tablet is then little, and the capacitance of detecting unit 40 also can be littler; Otherwise H is littler in the hole, and the area of tablet is then bigger, and the capacitance of detecting unit 40 also can be healed greatly.
Please with reference to Fig. 2 A and Fig. 2 B, suppose four systems judge the touch points system that is respectively judge touch points P1 (X1, Y1), P2 (X2, Y1), P3 (X1, Y2), P4 (X2, Y2).System judges that touch points P1～P4 forms a rectangle.System judges that touch points P1, P4 are positioned at a diagonally opposing corner of rectangle.System judges that touch points P2, P3 are positioned at another diagonally opposing corner of rectangle.
Then can be by step S302, when detecting four systems when judging touch points P1～P4, touch detection module 30 can be detected detecting unit 40 along direction Y in regular turn, to detect responsibility cycle YS1 and responsibility cycle YS2 (like Fig. 2 A and Fig. 2 B) in regular turn.Note that responsibility cycle YS1 representative system judge touch points P1 (X1, Y1) or P2 (X2, information Y1).Responsibility cycle YS2 representative system judge touch points P3 (X1, Y2) or P4 (X2, information Y2).
What deserves to be mentioned is that four systems judges that touch points only has two kinds of possibilities.A kind of possibility is that two actual touching a little are P1, P4, and wherein the capacitance of the capacitance of the detecting unit 40 that touch points P1 is corresponding greater than the corresponding detecting unit 40 of the judgement touch points P4 of system judged by system; Another possibility is that two actual touching a little are P2, P3, and wherein the capacitance of the capacitance of the detecting unit 40 that touch points P2 is corresponding less than the corresponding detecting unit 40 of the judgement touch points P3 of system judged by system.Note that the practical touch point can make the factor of the capacitance rising of detecting unit 40 ignore earlier.
Based on above-mentioned, but subsequent steps S303, and touch detection module 30 can be judged two practical touch points of acquisition the touch points from above-mentioned four systems according to the size of responsibility cycle YS1 and responsibility cycle YS2.If responsibility cycle YS1 is greater than responsibility cycle YS2, representative system judges that touch points P1, P4 are practical touch point (shown in Fig. 2 A); Otherwise less than responsibility cycle YS2, representative system judges that touch points P2, P3 are practical touch point (shown in Fig. 2 B) as if responsibility cycle YS1.Can judge that touch points obtains two practical touch points from four systems thus.
What deserves to be mentioned is; Though capacitor-type touch panel and system's judgement touch points method of discrimination have been depicted a possible kenel in the foregoing description; But having common knowledge the knowledgeable in the affiliated technical field should know; Each manufacturer judges that for capacitor-type touch panel and system the design of touch points method of discrimination is all different, and therefore application of the present invention is when being not restricted to the possible kenel of this kind.In other words, so long as the capacitance of a plurality of detecting units successively decreases along first direction, the edge second direction vertical with first direction detected above-mentioned detecting unit again, just has been to have met spirit of the present invention place.Below lift several embodiment again so that this area has the understanding spirit of the present invention that common knowledge the knowledgeable can be further, and embodiment of the present invention.
Though the foregoing description utilization is dug a hole and realized the detecting unit of different capacitances, it only is a kind of selection embodiment, and the present invention is not limited to this.Have the knack of the detecting unit that art technology person also can realize different capacitances by different way according to its demand.For instance, also can change the detecting unit that distance between the tablet realizes different capacitances.
Though the foregoing description according to the size of responsibility cycle YS1, YS2, judges that from four systems touch points obtains two practical touch points, it is merely a kind of selection embodiment, and the present invention is not as limit.Have the knack of art technology person and also can transfer capacitance to other electronic signal, differentiate the size of capacitance more according to this indirectly according to its demand.For instance, Fig. 4 is the synoptic diagram according to a kind of capacitor-type touch panel of another embodiment of the present invention.Please merge with reference to Fig. 2 A, 2B and with reference to Fig. 4, in the present embodiment, touch detection module 30 comprises that a plurality of PWM signal generators 200 and touch points judge module 300.Above-mentioned PWM signal generator 200 couples each corresponding detecting unit 40 respectively.PWM signal generator 200 can produce the PWM signal according to the capacitance of the detecting unit 40 of correspondence, and wherein the responsibility cycle of PWM signal can be determined by the capacitance of the detecting unit 40 of correspondence.
More particularly, PWM signal generator 200 can comprise external capacitive 201, internal capacitance 202, reference voltage generator 203, comparer 204, latch unit 205, high frequency frequency generator 206, counter 207, waveform generator 208, switch SW 1～SW3, resistance R 1.Switch SW 1～SW3 can be used to control discharging and recharging of external capacitive 201, internal capacitance 202, and wherein Vdd is for deciding voltage.The integral capacitor value that note that external capacitive 201, internal capacitance 202 can be determined by the capacitance of detecting unit 40.The capacitance of detecting unit 40 is bigger, and external capacitive 201 also can heal greatly with the integral capacitor value of internal capacitance 202; Otherwise the capacitance of detecting unit 40 is littler, and the integral capacitor value of external capacitive 201 and internal capacitance 202 also can be littler.External capacitive 201 is bigger with the integral capacitor value of internal capacitance 202, and its speed of discharging and recharging can heal slowly, and external capacitive 201 is littler with the integral capacitor value of internal capacitance 202, and its speed of discharging and recharging can heal soon.Reference voltage generator 203 can provide reference voltage Vrf to comparer 204.Comparer 204 can compare voltage and the reference voltage Vrf of terminal A and comparative result VC is exported to latch unit 205.
But latch unit 205 compared result VC carry out breech lock and output latch as a result VL to counter 207 and switch SW 3.Switch SW 3 can or be ended according to breech lock VL and conducting as a result.High frequency frequency generator 206 can provide high-frequency signal to counter 207.Counter 207 can according to breech lock as a result VL and high-frequency signal count, and count results is exported to waveform generator 208.Waveform generator 208 can produce the PWM signal according to count results, and the responsibility cycle of this PWM signal is determined by count results.
What deserves to be mentioned is that under the situation of not touching, terminal A, B all can present high-frequency signal.When touch points occurs in the relatively large detecting unit 40 of capacitance; Because external capacitive 201 is slow with the speed that discharges and recharges of internal capacitance 202; The frequency of terminal A, B can be less relatively, and 208 of waveform generators can produce the relatively large PWM signal of responsibility cycle and judge module 300 to touch points.When touch points occurs in the less relatively detecting unit 40 of capacitance; Because external capacitive 201 is fast with the speed that discharges and recharges of internal capacitance 202; The frequency of terminal A, B can be relatively large, and 208 of waveform generators can produce the less relatively PWM signal of responsibility cycle and judge module 300 to touch points.
Touch points judges that module 300 couples above-mentioned each PWM signal generator 200, and (present embodiment is direction Y) receives the first PWM signal and the second PWM signal in regular turn along the direction of scanning in meeting.In the present embodiment, the responsibility cycle of the first PWM signal can reflect the size of responsibility cycle YS1.The responsibility cycle of the second PWM signal can reflect the size of responsibility cycle YS2.Touch points judges that module 300 can judge two practical touch points of acquisition touch points P1～P4 from system according to the size of the responsibility cycle of the first PWM signal and the second PWM signal.Its preparation method can repeat no more at this with reference to the foregoing description.
In addition, among the embodiment of Fig. 2 A, Fig. 2 B, the capacitance of each detecting unit 40 is to successively decrease along direction X, but it only is a kind of selection embodiment, and the present invention is not as limit.For instance, Fig. 5 A and Fig. 5 B are the synoptic diagram according to a kind of capacitor-type touch panel of one embodiment of the invention.Fig. 5 A, Fig. 5 B and Fig. 2 A, Fig. 2 B are similar.Difference is that in Fig. 5 A and Fig. 5 B, the touch detection plate 21 of capacitor-type touch panel 11, the capacitance of its detecting unit 40 are to successively decrease along direction Y.
When touch points P1～P4 judged in the system that detects, touch detection module 30 can be detected detecting unit 40 along direction X in regular turn, to detect responsibility cycle XS1 and responsibility cycle XS2 in regular turn.If responsibility cycle XS1 is greater than responsibility cycle XS2, representative system judges that touch points P1, P4 are practical touch point (shown in Fig. 5 A); Otherwise less than responsibility cycle XS2, representative system judges that touch points P2, P3 are practical touch point (shown in Fig. 5 B) as if responsibility cycle XS1.Can judge that touch points obtains two practical touch points from four systems thus.
In Fig. 2 A, Fig. 2 B, Fig. 5 A and Fig. 5 B, direction X is right by left side court, and direction Y is by down up, but the present invention is not limited to this.But haveing the knack of art technology person should know; Above-mentioned each embodiment direction X changes into by right and changing into by down last towards a left side or with direction Y; As long as suitably the discriminant approach of adjustment touch detection module 30 can judge that touch points obtains two practical touch points from four systems too.
In sum, the present invention lines up an array with a plurality of detecting units along perpendicular first direction and second direction.The capacitance of above-mentioned detecting unit successively decreases along first direction.When four systems judgement touch points takes place, can detect detecting unit in regular turn along second direction, to obtain one first responsibility cycle and second responsibility cycle in regular turn.Then again according to the size of first responsibility cycle and second responsibility cycle, can judge that touch points judges two practical touch points from four systems.
Though the present invention with embodiment openly as above; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking aforesaid the claim scope person of defining.
Claims (8)
1. a capacitor-type touch panel is characterized in that, comprising:
One touch detection plate comprises a plurality of detecting units, and those detecting units are arranged to form an array along a first direction and a second direction, and wherein those detecting units are the electric capacity kenel, and the capacitance of those detecting units successively decreases along this first direction; The capacitance of those detecting units remains unchanged along this second direction; And
One touch detection module couples this touch detection plate, in order to detecting at least two practical touch point; When detecting four systems judgement touch points; In regular turn those detecting units are detected along this second direction; To detect one first responsibility cycle and one second responsibility cycle in regular turn, judge from above-mentioned four systems according to the size of this first responsibility cycle and this second responsibility cycle again to obtain two practical touch points the touch points;
Wherein, Above-mentioned four systems judges that touch points forms a rectangle; Above-mentioned four systems judges that touch points is respectively one first system judgement touch points, touch points, tertiary system system judgement touch points and Quaternary system system judgement touch points are judged by one second system; This first system judges that touch points and this Quaternary system system judgement touch points are positioned at a diagonally opposing corner of this rectangle, and this second system judgement touch points and this tertiary system system judge that touch points is positioned at another diagonally opposing corner of this rectangle; On behalf of this first system, this first responsibility cycle judge the information of touch points or this second system judgement touch points, and on behalf of this tertiary system system judgement touch points or this Quaternary system system, this second responsibility cycle judge the information of touch points; This first system judge touch points along this first direction and this second direction move all can towards this Quaternary system system judgement touch points near; If this first responsibility cycle is greater than this second responsibility cycle, this first system judges that touch points and this Quaternary system system judgement touch points are above-mentioned two practical touch points; If this first responsibility cycle is less than this second responsibility cycle, this second system judges that touch points and this tertiary system system judgement touch points are above-mentioned two practical touch points.
2. a capacitor-type touch panel is characterized in that, comprising:
One touch detection plate comprises a plurality of detecting units, and those detecting units are arranged to form an array along a first direction and a second direction, and wherein those detecting units are the electric capacity kenel, and the capacitance of those detecting units successively decreases along this first direction; The capacitance of those detecting units remains unchanged along this second direction; And
One touch detection module couples this touch detection plate, in order to detecting at least two practical touch point; When detecting four systems judgement touch points; In regular turn those detecting units are detected along this second direction; To detect one first responsibility cycle and one second responsibility cycle in regular turn, judge from above-mentioned four systems according to the size of this first responsibility cycle and this second responsibility cycle again to obtain two practical touch points the touch points;
Wherein, Above-mentioned four systems judges that touch points forms a rectangle; Above-mentioned four systems judges that touch points is respectively one first system judgement touch points, touch points, tertiary system system judgement touch points and Quaternary system system judgement touch points are judged by one second system; This first system judges that touch points and this Quaternary system system judgement touch points are positioned at a diagonally opposing corner of this rectangle, and this second system judgement touch points and this tertiary system system judge that touch points is positioned at another diagonally opposing corner of this rectangle; This first system judge touch points along this first direction and this second direction move all can towards this Quaternary system system judgement touch points near; If this first responsibility cycle is greater than this second responsibility cycle, this first system judges that touch points and this Quaternary system system judgement touch points are above-mentioned two practical touch points; If this first responsibility cycle is less than this second responsibility cycle, this second system judges that touch points and this tertiary system system judgement touch points are above-mentioned two practical touch points;
This touch detection module further comprises:
A plurality of PWM signal generators; Couple those detecting units respectively; Above-mentioned two practical touch points fall within one first detecting unit and one second detecting unit of those detecting units; This first detecting unit and this second detecting unit correspond respectively to the one first PWM signal generator and the one second PWM signal generator of those PWM signal generators; This first PWM signal generator and this second PWM signal generator are arranged along this second direction in regular turn; This first PWM signal generator can be exported one first corresponding PWM signal earlier in the case; Then this second PWM generator can be exported one second corresponding PWM signal again, and wherein the responsibility cycle of this first PWM signal and this second PWM signal is determined by the capacitance of this first detecting unit and this second detecting unit respectively; The responsibility cycle of this first PWM signal reflects this first responsibility cycle, and the responsibility cycle of this second PWM signal reflects this second responsibility cycle; And
One touch points is judged module; Couple those PWM signal generators; Receive this first PWM signal and this second PWM signal in regular turn; And, judge from above-mentioned four systems to obtain above-mentioned two practical touch points the touch points according to the size of the responsibility cycle of this first PWM signal and this second PWM signal.
3. capacitor-type touch panel as claimed in claim 1 is characterized in that this first direction is vertical with this second direction.
4. capacitor-type touch panel as claimed in claim 3 is characterized in that, this first direction is that transverse axis, this second direction are Z-axis.
5. capacitor-type touch panel as claimed in claim 3 is characterized in that, this first direction is that Z-axis, this second direction are transverse axis.
6. capacitor-type touch panel as claimed in claim 1 is characterized in that, is positioned at respectively this detecting unit of above-mentioned two practical touch points, and its capacitance can rise.
7. ghost point judging method; Be applicable to a capacitor-type touch panel, it is characterized in that this capacitor-type touch panel comprises a touch detection plate and a touch detection module; This touch detection plate further comprises a plurality of detecting units; Those detecting units are arranged to form an array along a first direction and a second direction, and this first direction is vertical with this second direction, and those detecting units are the electric capacity kenel; The capacitance of those detecting units successively decreases along this first direction, and the capacitance of those detecting units remains unchanged along this second direction; This ghost point judging method comprises:
When detecting four systems judgement touch points, in regular turn those detecting units are detected along this second direction, to detect one first responsibility cycle and one second responsibility cycle in regular turn; And
Size according to this first responsibility cycle and this second responsibility cycle is judged two practical touch points of acquisition the touch points from above-mentioned four systems;
Wherein, Above-mentioned four systems judges that touch points forms a rectangle; Above-mentioned four systems judges that touch points is respectively one first system judgement touch points, touch points, tertiary system system judgement touch points and Quaternary system system judgement touch points are judged by one second system; This first system judges that touch points and this Quaternary system system judgement touch points are positioned at a diagonally opposing corner of this rectangle, and this second system judgement touch points and this tertiary system system judge that touch points is positioned at another diagonally opposing corner of this rectangle; On behalf of this first system, this first responsibility cycle judge the information of touch points or this second system judgement touch points, and on behalf of this tertiary system system judgement touch points or this Quaternary system system, this second responsibility cycle judge the information of touch points; This first system judge touch points along this first direction and this second direction move all can towards this Quaternary system system judgement touch points near; If this first responsibility cycle is greater than this second responsibility cycle, this first system judges that touch points and this Quaternary system system judgement touch points are above-mentioned two practical touch points; If this first responsibility cycle is less than this second responsibility cycle, this second system judges that touch points and this tertiary system system judgement touch points are above-mentioned two practical touch points.
8. ghost point judging method; Be applicable to a capacitor-type touch panel, it is characterized in that this capacitor-type touch panel comprises a touch detection plate and a touch detection module; This touch detection plate further comprises a plurality of detecting units; Those detecting units are arranged to form an array along a first direction and a second direction, and this first direction is vertical with this second direction, and those detecting units are the electric capacity kenel; The capacitance of those detecting units successively decreases along this first direction, and the capacitance of those detecting units remains unchanged along this second direction; This touch detection module further comprises: a plurality of PWM signal generators; Couple those detecting units respectively; Two practical touch points fall within one first detecting unit and one second detecting unit of those detecting units; This first detecting unit and this second detecting unit correspond respectively to the one first PWM signal generator and the one second PWM signal generator of those PWM signal generators; This first PWM signal generator and this second PWM signal generator are arranged along this second direction in regular turn; This first PWM signal generator can be exported one first corresponding PWM signal earlier in the case; Then this second PWM generator can be exported one second corresponding PWM signal again, and wherein the responsibility cycle of this first PWM signal and this second PWM signal is determined by the capacitance of this first detecting unit and this second detecting unit respectively; This ghost point judging method comprises:
When detecting four systems judgement touch points, in regular turn those detecting units are detected along this second direction, to detect one first responsibility cycle and one second responsibility cycle in regular turn; Wherein, the responsibility cycle of this first PWM signal reflects this first responsibility cycle, and the responsibility cycle of this second PWM signal reflects this second responsibility cycle; And
Size according to this first responsibility cycle and this second responsibility cycle is judged two practical touch points of acquisition the touch points from above-mentioned four systems;
Wherein, Above-mentioned four systems judges that touch points forms a rectangle; Above-mentioned four systems judges that touch points is respectively one first system judgement touch points, touch points, tertiary system system judgement touch points and Quaternary system system judgement touch points are judged by one second system; This first system judges that touch points and this Quaternary system system judgement touch points are positioned at a diagonally opposing corner of this rectangle, and this second system judgement touch points and this tertiary system system judge that touch points is positioned at another diagonally opposing corner of this rectangle; This first system judge touch points along this first direction and this second direction move all can towards this Quaternary system system judgement touch points near; If this first responsibility cycle is greater than this second responsibility cycle, this first system judges that touch points and this Quaternary system system judgement touch points are above-mentioned two practical touch points; If this first responsibility cycle is less than this second responsibility cycle, this second system judges that touch points and this tertiary system system judgement touch points are above-mentioned two practical touch points.
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| US8358276B2 (en) * | 2007-12-21 | 2013-01-22 | Apple Inc. | Touch pad electrode design |
| TWI397850B (en) * | 2008-05-14 | 2013-06-01 | Ind Tech Res Inst | Sensing apparatus and scanning actuation method thereof |
| TWI360772B (en) * | 2008-10-13 | 2012-03-21 | Coretronic Corp | Capacitive touch pad and touch point detecting met |
-
2010
- 2010-06-11 CN CN2010102033887A patent/CN101859217B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI843633B (en) | 2023-07-27 | 2024-05-21 | 新唐科技股份有限公司 | Electronic device, development board, and test system thereof |
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| Publication number | Publication date |
|---|---|
| CN101859217A (en) | 2010-10-13 |
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