CN102214026A - Touch control sensing system, electronic touch control device and touch control sensing method - Google Patents
Touch control sensing system, electronic touch control device and touch control sensing method Download PDFInfo
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- CN102214026A CN102214026A CN2010101516739A CN201010151673A CN102214026A CN 102214026 A CN102214026 A CN 102214026A CN 2010101516739 A CN2010101516739 A CN 2010101516739A CN 201010151673 A CN201010151673 A CN 201010151673A CN 102214026 A CN102214026 A CN 102214026A
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Abstract
The invention provides a touch control sensing system which comprises a touch control interface, at least one sensing unit and a switching unit. The sensing unit is coupled to the touch control interface. The switching unit is used for switching the touch control sensing system into a first sensing mode or a second sensing mode according to a control signal. When the touch control sensing system is in the first sensing mode, the sensing unit senses a first sensing signal and a second sensing signal of the touch control interface. On the other hand, when the touch control sensing system is in the second sensing mode, the sensing unit senses the first sensing signal according to a drive signal. The invention further provides an electronic touch control device and a touch control sensing method.
Description
Technical field
The present invention relates to a kind of sensing system, electronic installation and method for sensing, and be particularly related to a kind of touch-control sensing system, electronic touch device and sensing method of touch control.
Background technology
At present, contact panel roughly can be divided into contact panels such as resistance-type, condenser type, infrared-type and ultrasonic formula, is modal product with electric resistance touch-control panel and capacitance type touch-control panel wherein.And compared to detecting the electric resistance touch-control panel of user's action by pushing panel, capacitance type touch-control panel only need or suspend by touching just can detect user's action.In the prior art, capacitance type touch-control panel is to utilize the appearance value of detecting on the sense wire to change to obtain single-point or the touch information more than 2.
Summary of the invention
The invention provides a kind of touch-control sensing system, it has two kinds of sensing modes.
The present invention also provides a kind of electronic touch device, and it comprises that above-mentioned touch-control sensing system provides suitable sensing modes with the foundation functional requirement.
The present invention provides a kind of sensing method of touch control again, and it provides two kinds of sensing modes.
The present invention proposes a kind of touch-control sensing system, and it comprises touch-controlling interface, at least one sensing cell and switch unit.Sensing cell couples touch-controlling interface.Switch unit switches to first sensing modes or second sensing modes according to a control signal with the touch-control sensing system.When the touch-control sensing system is in first sensing modes, first sensing signal of sensing cell sensing touch-controlling interface and second sensing signal.When the touch-control sensing system is in second sensing modes, sense unit drive signal sensing first sensing signal.
In one embodiment of this invention, above-mentioned at least one sensing cell couples switch unit, and when first sensing modes sensing second sensing signal.
In one embodiment of this invention, above-mentioned at least one sensing cell comprises first sensing cell and second sensing cell.First sensing cell couples touch-controlling interface with sensing first sensing signal.Second sensing cell couples switch unit, and when first sensing modes sensing second sensing signal.
In one embodiment of this invention, the touch-control sensing system also comprises a driver element.Driver element couples switch unit, and according to control signal when second sensing modes output drive signal to touch-controlling interface.
In one embodiment of this invention, above-mentioned control signal is that touch information according to touch-controlling interface produces.
In one embodiment of this invention, above-mentioned touch information be first sensing signal and second sensing signal at least one of them.
In one embodiment of this invention, above-mentioned control signal is to produce according to an external command.
In one embodiment of this invention, above-mentioned switch unit comprise microprocessor, switchgear and arithmetic logic unit at least one of them.
The present invention also proposes a kind of electronic touch device, and it comprises an above-mentioned touch-control sensing system and a processing unit.Processing unit couples sensing cell and switch unit.Processing unit produces above-mentioned control signal, and according at least one position of touch on one of them decision touch-controlling interface at least of first sensing signal and second sensing signal.
In one embodiment of this invention, above-mentioned processing unit produces above-mentioned control signal according to the touch information of touch-controlling interface.
In one embodiment of this invention, above-mentioned processing unit produces above-mentioned control signal according to an external command.
In addition, the present invention also proposes a kind of sensing method of touch control, and it is applicable to a touch-control sensing system.Sensing method of touch control may further comprise the steps.At first, according to a control signal touch-control sensing system is switched to first sensing modes or second sensing modes.When the touch-control sensing system is in first sensing modes, one first sensing signal of sensing one touch-controlling interface and one second sensing signal.On the other hand, when the touch-control sensing system is in second sensing modes, according to a drive signal sensing first sensing signal.
In one embodiment of this invention, sensing method of touch control comprises that also the touch information according to touch-controlling interface produces control signal.In addition, touch information for example be first sensing signal and second sensing signal at least one of them.
In one embodiment of this invention, sensing method of touch control also comprises according to external command generation control signal.
Based on above-mentioned, because the touch-control sensing system of embodiments of the invention has first sensing modes and second sensing modes concurrently, so only sensing modes can be provided according to the demand of user or system.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 is in the block schematic diagram of first sensing modes for the electronic touch device of one embodiment of the invention;
Fig. 2 is in the block schematic diagram of second sensing modes for the electronic touch device of one embodiment of the invention;
Fig. 3 is the flow chart of steps of the sensing method of touch control of one embodiment of the invention.
Description of reference numerals:
100: the electronic touch device;
110: touch-controlling interface;
112: the first circuits;
114: the second circuits;
120,120a, 120b: sensing cell;
122: sense wire;
130: switch unit;
140: processing unit;
150: load bearing unit;
160: driver element;
162: drive wire;
170: touch object;
180: the touch-control sensing system;
S1, S2: sensing signal;
SC1, SC2: control signal;
SD: drive signal;
SP: sensing points;
P1: position;
S110～S130: step.
Embodiment
Fig. 1 is the block schematic diagram that the electronic touch device of one embodiment of the invention is in first sensing modes, and Fig. 2 is in the block schematic diagram of second sensing modes for the electronic touch device of one embodiment of the invention.Please earlier with reference to Fig. 1, the electronic touch device 100 of present embodiment comprises touch-controlling interface 110, at least one sensing cell 120, switch unit 130 and processing unit 140, and wherein touch-controlling interface for example is the contact panel of general display or the touch pad of other tool touch-control sensing functions.In addition, in the present embodiment, electronic touch device 100 also comprises driver element 160.Driver element 160 is coupled to switch unit 130 and processing unit 140, and is suitable for transmitting drive signal, and according to the transmission of control signal SC2 decision drive signal whether driver element 160 for example is.
In addition, processing unit 140 for example is embedded in the load bearing unit 150, and load bearing unit 150 for example is computer system or any electronic product with processing unit.In addition, the processing unit 140 of present embodiment also couples with sensing cell 120 and switch unit 130 respectively.Wherein, though the sensing cell 120 of present embodiment is illustrated in not existing together of Fig. 1 respectively, in fact sensing cell 120a and sensing cell 120b are the part of sensing cell 120.
As shown in Figure 1, switch unit 130 is according to control signal SC1 the touch-control sensing system 180 of electronic touch device 100 to be switched to first sensing modes or second sensing modes, and control signal SC1 for example is by processing unit 140 output, and for example is to produce or produce automatically according to the functional requirement of load bearing unit 150 according to external command.On the other hand, switch unit 130 for example comprise microprocessor, switchgear and arithmetic logic unit at least one of them.
In Fig. 1, the electronic touch device 100 of present embodiment is to be switched to first sensing modes, and wherein, first sensing modes of present embodiment for example is the self-capacitance sensing modes.And the self-capacitance sensing modes is to utilize appearance value variation on the single sense wire to obtain the touch information of single-point.As shown in Figure 1, under the situation of self-capacitance sensing modes, the switching of sensing cell 120b by switch unit 130 is to be coupled to each other with touch-controlling interface 110.Specifically, second circuit 114 of touch-controlling interface sees through switch unit 130 and is coupled to each other with the sense wire 122 of sensing cell 120b.Thus, sensing cell 120b just can sense signal on the touch-controlling interface 110 by second circuit 114 and sense wire 122.
Please continue with reference to Fig. 1, touch-controlling interface 110 comprises a plurality of first circuits 112 and a plurality of second circuits 114, and wherein first circuit 112 and second circuit 114 constitute a plurality of sensing points SP.When a touch object 170 (for example finger) when being positioned at the sensing points SP of position P1 near touch-controlling interface 110, sensing cell 120a can detect sensing signal S1, and sensing signal S1 for example is first circuit 112 of correspondence position P1 and variation capacitance or the voltage that can detect or the current value of fixed electorde (as the electrode of ground connection).In addition, because this moment, switch unit 130 was coupled in sensing cell 120b with second circuit 114, so sensing cell 120a also can detect another sensing signal S2, wherein, sensing signal S2 for example is second circuit 114 of correspondence position P1 and the variation capacitance of fixed electorde (as the electrode of ground connection).
Then, sensing cell 120 is sent to processing unit 140 with sensing signal S1 and S2 again, and then makes processing unit 140 determine the location coordinate of touch object 170 with respect to touch-controlling interface 110 according to sensing signal S1 and S2.Watch from another angle, second circuit 114 and first circuit 112 for example are the X-Y axes of coordinates in corresponding Descartes (Cartesian) coordinate system.And by sensing signal S1 and S2, processing unit 140 just can determine touch object 170 with respect to the coordinate of touch-controlling interface 110 (x, y).Yet the present invention is not limited to this, and in another embodiment, the present invention also can utilize rho theta system to represent the position of touch object 170 with respect to touch-controlling interface 110.
Generally, during in no touch-control object touching or near touch-controlling interface 110, pairing first circuit 112 of sensing points SP and second circuit 114 have two capacitive-based floors (base line value), and when touch object 170 during via touch-control or near touch-controlling interface 110, corresponding sensing points SP can be because of being made first circuit 112 and second circuit 114 capacitance generation positive change amount originally by touch-control.Then, sensing cell 120 can sense 114 in sensing first circuit 112 and second circuit not Chan Sheng electric capacity recruitment (the sensing signal S1 and the S2 that for example change), and then make the position of touch of processing unit 140 decision touch objects 170 with respect to touch-controlling interface 110.
According to above-mentioned, under the situation of first sensing modes, the processing unit 140 of present embodiment is to decide position of touch by sensing signal S1 and S2 that sensing cell 120 is sensed.That is to say that in the present embodiment, first circuit 112 on the touch-controlling interface 110 and second circuit 114 are similar to the sense wire that self-capacitance type touch-controlling interface upper edge different directions extends.Because the touch-control sensing system 180 of this moment is the self-capacitance sensing modes, so electronic touch device 100 just has power saving and the simple advantage of signal analysis.In addition, in other embodiments, for ease of the layout of circuit, sensing cell 120 also can be the two feeling of independence measurement units that are respectively coupled to touch-controlling interface 110 and switch unit 130.
Fig. 2 is in the block schematic diagram of second sensing modes for the electronic touch device 100 of Fig. 1.For example, when the user wants to become the multi-point touch pattern when carrying out greater functionality (for example the amplification of form or dwindle) from the single-point touch mode switch, processing unit 140 can switch to second sensing modes with the touch-control sensing system 180 with electronic touch device 100 by output control signal SC1, wherein touching signals SC1 for example is according to producing on the touch information on external command or the touch-controlling interface 110, its for example be sensing signal S1 and S2 at least one of them.
For example, when processing unit 140 senses when on the present touch-controlling interface 110 a plurality of sensing points SP being arranged by touch-control by sensing signal S1 or S2, just but automatic output control signal SC1 is with the switching of control switch unit 130, and then touch-control sensing system 180 is switched to for example is second sensing modes with multi-point touch function.In the present embodiment, second sensing modes is for example for the mutual capacitance sensing modes, and its sense waveform by the detecting sensing points to be obtaining the capacitor's capacity between drive wire and sense wire, and utilizes the appearance value of being detected to change and obtain single-point or the touch information more than 2.
As shown in Figure 2, when electronic touch device 100 was in the mutual capacitance sensing modes, the drive wire 162 that second circuit 114 of touch-controlling interface 100 sees through switch unit 130 and driver element was coupled to each other.On the other hand, processing unit 140 for example can be exported control signal SC2 to driver element 160, so that driver element 160 output drive signal SD are to touch-controlling interface 110.Thus, driver element 160 just can be sent to touch-controlling interface 110 with drive signal SD by the drive wire 162 and second circuit 114.
Specifically, during operation, processing unit 140 at different time in regular turn to each bar drive wire 162 output drive signal SD.Then, drive signal SD is transferred into touch-controlling interface 110 by drive wire 162, switch unit 130 and second circuit 114.Owing to intersection (being sensing points SP) the meeting formation capacitive coupling node of first circuit 112 and second circuit 114, so the electric charge on second circuit 114 can see through first circuit 112 that near the electric capacity (not shown) of sensing points SP be coupled to the intersection correspondence.Thus, sensing cell 120a just can see through first circuit 112 and sense sensing signal S1, and wherein sensing signal S1 for example is electric current, voltage or capacitance.
Particularly, when touch object 170 (for example finger) when being positioned at the sensing points of position P1 near touch-controlling interface 110, originally the drive signal SD that is coupled to first circuit 112 can change, and makes sensing cell 120a detect sensing signal S1 and other positions are different at correspondence position P1.Then, processing unit 140 just can receive the above-mentioned sensing signal S1 that changes, and then determines the location coordinate of touch object 170 with respect to touch-controlling interface 110.
Similarly, as plural touch object during near touch-controlling interface 110, sensing cell 120a can sense two sensing signal S1 that change, and second circuit 114 of arranging in pairs or groups again receives the time of drive signal SD, and processing unit 140 just can pick out the position of touch more than 2.So by mutual capacitance sensing modes as shown in Figure 2, electronic touch device 100 can be realized the identification of a plurality of incidents of touch-control simultaneously or almost simultaneously.In other words, the touch-control sensing system 180 of the electronic touch device 100 of Fig. 2 can detect the touch-control incident that takes place on the touch-controlling interface 110 in a plurality of whiles, approaching while or cycle time.
Generally, when the user wants to become multi-point touch pattern (for example the amplification of form or dwindle) when carrying out greater functionality from the single-point touch mode switch, the processing unit 140 of present embodiment can be according to the touch information of external command that the user imported or touch-controlling interface 110 to switch unit 130 output control signal SC1 so that second circuit 114 is coupled to each other with driver element 160.Wherein touch information for example is sensing signal S2.For example, when sensing cell 120a senses a plurality of sensing signal S2 that changes, processing unit 140 can carry out logical operation and produce control signal SC1 or the mathematical combination by sensing signal S2 produces control signal SC1 above-mentioned sensing signal S2, with the switching of control switch unit 130.
Perhaps, in another embodiment, when load bearing unit 150 must enter the situation that needs complete touch information, for example open the duty need the multi-point touch function, processing unit 140 SC1 that can transmit control signal gives switch unit 130 so that touch-control sensing system 180 enters mutual capacitance sensing modes (being second sensing modes of present embodiment).
On the other hand, when load bearing unit 150 is considered when entering idle mode automatically based on power saving, the standby time and the SC1 that transmits control signal automatically are to switch unit 130 during load bearing unit 150 internal accountings, so that being switched to, touch-control sensing system 180 it is generally acknowledged that function is more restricted, but the self-capacitance type sensing modes of power saving (being first sensing modes of present embodiment) comparatively.In addition, in another embodiment, consider province's electrical efficiency of long-term use, processing unit 140 also can receive the instruction that is sent by the outside and use the self-tolerant sensing modes to force touch-control sensing system 180.
In other words, the touch-control sensing system 180 of the electronic touch device 100 of present embodiment provides two kinds of sensing modes of self-capacitance and mutual capacitance, can select the touch-control sensing pattern that is fit to so that user or system to be provided under different situations.Wherein switch unit 130 is as switching the switch of self-capacitances with the mutual capacitance sensing modes, and the switching of switch unit 130 for example is that the functional requirement of the touch information obtained of foundation or load bearing unit 150 is to select optimal operating mode.Thus, touch-control sensing system 180 becomes the advantage that has had two kinds of sensing modes concurrently.In addition, though first sensing modes and second sensing modes are respectively self-capacitance and mutual capacitance sensing modes in the present embodiment, yet in other embodiments, first sensing modes and second sensing modes also can be respectively mutual capacitance and self-capacitance sensing modes.
Fig. 3 is the flow chart of steps of the sensing method of touch control of one embodiment of the invention.Please be simultaneously with reference to Fig. 1 and Fig. 2, the sensing method of touch control of present embodiment comprises the steps.At first, in step S110, touch-control sensing system 180 is switched to first sensing modes or second sensing modes according to control signal SC1.Then, in step S120, when touch-control sensing system 180 is in first sensing modes (self-capacitance sensing modes for example shown in Figure 1), one first sensing signal of sensing cell 120 sensing touch-controlling interfaces 110 and one second sensing signal (for example sensing signal SC1 and SC2).On the other hand, in step S130, when touch-control sensing system 180 was in second sensing modes (mutual capacitance sensing modes for example shown in Figure 1), sensing cell 120 was according to drive signal SD sensing first sensing signal (for example sensing signal SD1).
In addition, in other embodiments, sensing method of touch control also comprises according to a touch information of touch-controlling interface 180 and produces control signal SC1, wherein above-mentioned touch information for example be first sensing signal and this second sensing signal at least one of them.Perhaps, in another embodiment, sensing method of touch control also comprises according to external command generation control signal SC1.Because the sensing method of touch control of present embodiment can obtain enough teachings, suggestion and implementation in the narration by Fig. 1 and Fig. 2 embodiment, therefore repeat no more.
In sum, in an embodiment of the present invention, because switch unit can switch to first sensing modes or second sensing modes (for example being self-capacitance sensing modes and mutual capacitance sensing modes) with the touch-control sensing system according to control signal, so the touch-control sensing system can provide user or system only sensing modes according to present situation.Thus, the touch-control sensing system of embodiments of the invention and electronic touch device just have the power saving advantage of self-capacitance sensing modes and the multi-point touch function of mutual capacitance sensing modes concurrently.
Though the present invention discloses as above with embodiment; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when change and the retouching that can do a little, so the content that protection scope of the present invention is worked as with claim is as the criterion.
Claims (20)
1. a touch-control sensing system is characterized in that, comprising:
One touch-controlling interface;
At least one sensing cell couples described touch-controlling interface; And
One switches the unit, according to a control signal described touch-control sensing system is switched to one first sensing modes or one second sensing modes,
Wherein, when described touch-control sensing system is in described first sensing modes, one first sensing signal of the described touch-controlling interface of described sensing cell sensing and one second sensing signal, when described touch-control sensing system is in described second sensing modes, described first sensing signal of described sense unit one drive signal sensing.
2. touch-control sensing according to claim 1 system is characterized in that described at least one sensing cell couples described switch unit, and when described first sensing modes described second sensing signal of sensing.
3. touch-control sensing according to claim 1 system is characterized in that described at least one sensing cell comprises:
One first sensing cell couples described touch-controlling interface with described first sensing signal of sensing; And
One second sensing cell couples described switch unit, and when described first sensing modes described second sensing signal of sensing.
4. touch-control sensing according to claim 1 system is characterized in that, also comprises a driver element, couples described switch unit, and exports described drive signal to described touch-controlling interface according to described control signal when described second sensing modes.
5. touch-control sensing according to claim 1 system is characterized in that, described control signal is that the touch information according to described touch-controlling interface produces.
6. touch-control sensing according to claim 5 system is characterized in that, described touch information be described first sensing signal and described second sensing signal at least one of them.
7. touch-control sensing according to claim 1 system is characterized in that, described control signal is to produce according to an external command.
8. touch-control sensing according to claim 1 system is characterized in that, described switch unit comprise a microprocessor, a switchgear and an arithmetic logic unit at least one of them.
9. an electronic touch device is characterized in that, comprising:
One touch-control sensing system comprises:
One touch-controlling interface;
At least one sensing cell couples described touch-controlling interface; And
One switches the unit, according to a control signal described electronic touch device is switched to one first sensing modes or one second sensing modes,
Wherein, when described electronic touch device is in described first sensing modes, one first sensing signal of the described touch-controlling interface of described sensing cell sensing and one second sensing signal, when described electronic touch device is in described second sensing modes, described first sensing signal of described sense unit one drive signal sensing; And
One processing unit couples described sensing cell and described switch unit, produces described control signal, and according to described first sensing signal and described second sensing signal one of them determines at least one position of touch on the described touch-controlling interface at least.
10. electronic touch device according to claim 9 is characterized in that, described processing unit produces described control signal according to a touch information of described touch-controlling interface.
11. electronic touch device according to claim 10 is characterized in that, described touch information be first sensing signal and described second sensing signal at least one of them.
12. electronic touch device according to claim 9 is characterized in that, described processing unit produces described control signal according to an external command.
13. electronic touch device according to claim 9 is characterized in that, described at least one sensing cell couples described switch unit, and when described first sensing modes described second sensing signal of sensing.
14. electronic touch device according to claim 9 is characterized in that, described at least one sensing cell comprises:
One first sensing cell couples described touch-controlling interface with described first sensing signal of sensing; And
One second sensing cell couples described switch unit, and when described first sensing modes described second sensing signal of sensing.
15. electronic touch device according to claim 9, it is characterized in that, also comprise a driver element, couple described switch unit and described processing unit, export described drive signal to described touch-controlling interface when described second sensing modes according to described control signal.
16. electronic touch device according to claim 9 is characterized in that, described switch unit comprise a microprocessor, a switchgear and an arithmetic logic unit at least one of them.
17. a sensing method of touch control is applicable to a touch-control sensing system, it is characterized in that described sensing method of touch control comprises:
According to a control signal described touch-control sensing system is switched to one first sensing modes or one second sensing modes;
When described touch-control sensing system is in described first sensing modes, one first sensing signal of sensing one touch-controlling interface and one second sensing signal;
When described touch-control sensing system is in described second sensing modes, according to described first sensing signal of a drive signal sensing.
18. sensing method of touch control according to claim 17 is characterized in that, comprises that also the touch information according to described touch-controlling interface produces described control signal.
19. sensing method of touch control according to claim 18 is characterized in that, described touch information be described first sensing signal and described second sensing signal at least one of them.
20. sensing method of touch control according to claim 17 is characterized in that, also comprises according to an external command producing described control signal.
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