CN102214026B - 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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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 the contact panels such as resistance-type, condenser type, infrared-type and ultrasonic formula, wherein take electric resistance touch-control panel and capacitance type touch-control panel as modal product.And compared to could detect the electric resistance touch-control panel of user's action by pressing 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 on the detecting 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 again a kind of sensing method of touch control, 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 the first sensing modes or the second sensing modes according to a control signal with the touch-control sensing system.When the touch-control sensing system is in the first sensing modes, the first sensing signal of sensing cell sensing touch-controlling interface and the second sensing signal.When the touch-control sensing system was in the second sensing modes, sense unit drove signal sensing the first sensing signal.
In one embodiment of this invention, above-mentioned at least one sensing cell couples switch unit, and when the first sensing modes sensing the second sensing signal.
In one embodiment of this invention, above-mentioned at least one sensing cell comprises the first sensing cell and the second sensing cell.The first sensing cell couples touch-controlling interface with sensing the first sensing signal.The second sensing cell couples switch unit, and when the first sensing modes sensing the 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 the 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 the first sensing signal and the 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 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 the first sensing signal and the 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 comprises the following steps.At first, according to a control signal, the touch-control sensing system is switched to the first sensing modes or the second sensing modes.When the touch-control sensing system is in the 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 the second sensing modes, drive signal sensing the first sensing signal according to one.
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 be for example the first sensing signal and the second sensing signal at least one of them.
In one embodiment of this invention, sensing method of touch control also comprises according to an external command generation control signal.
Based on above-mentioned, because the touch-control sensing system of embodiments of the invention has the first sensing modes and the second sensing modes concurrently, so most suitable 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 coordinate appended graphic being described in detail below.
Description of drawings
Fig. 1 is the block schematic diagram that the electronic touch device of one embodiment of the invention is in the first sensing modes;
Fig. 2 is the block schematic diagram that the electronic touch device of one embodiment of the invention is in the second sensing modes;
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 the first sensing modes, and Fig. 2 is the block schematic diagram that the electronic touch device of one embodiment of the invention is in the second sensing modes.Please first with reference to Fig. 1, the electronic touch device 100 of the 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 is for example 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 and drives signal, and driver element 160 be for example determine to drive signal according to control signal SC2 transmission whether.
In addition, processing unit 140 for example is embedded in 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 the present embodiment also couples with sensing cell 120 and switch unit 130 respectively.Wherein, though the sensing cell 120 of the present embodiment is illustrated in respectively not existing together of Fig. 1, 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 the first sensing modes or the second sensing modes, and control signal SC1 is for example by processing unit 140 output, and is for example to produce or automatically produce 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 the present embodiment is to be switched to the first sensing modes, and wherein, first sensing modes of the present embodiment is for example the self-capacitance sensing modes.And the self-capacitance sensing modes is to utilize appearance value variation on single sense wire to obtain the touch information of single-point.As shown in Figure 1, in the situation that the 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, the 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 touch-controlling interface 110 by the second circuit 114 and sense wire 122.
Please continue with reference to Fig. 1, touch-controlling interface 110 comprises a plurality of the first circuits 112 and a plurality of second circuits 114, and wherein the first circuit 112 and the second circuit 114 consist of 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 is for example the 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, due to this moment switch unit 130 with sensing cell 120b together with the second circuit 114 is coupled in, so sensing cell 120a also can detect another sensing signal S2, wherein, sensing signal S2 is for example the 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 that according to sensing signal S1 and S2 touch object 170 is with respect to the location coordinate of touch-controlling interface 110.Watch from another angle, the second circuit 114 and the first circuit 112 are for example the X-Y axes of coordinates in corresponding Descartes (Cartesian) coordinate system.And by sensing signal S1 and S2, processing unit 140 can determine that just touch object 170 is with respect to the coordinate (x, y) of touch-controlling interface 110.Yet the present invention is not limited to this, and in another embodiment, the present invention also can utilize rho theta system to represent that touch object 170 is with respect to the position of touch-controlling interface 110.
Generally, without the touching of touch-control object or near touch-controlling interface 110 time, corresponding the first circuit 112 of sensing points SP and the 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 being made the first circuit 112 and the second circuit 114 capacitance generation positive change amount originally by touch-control.Then, sensing cell 120 can sense 114, sensing the first circuit 112 and the second circuit not Chan Sheng electric capacity recruitment (the sensing signal S1 and the S2 that for example change), and then make processing unit 140 determine that touch objects 170 are with respect to the position of touch of touch-controlling interface 110.
According to above-mentioned, in the situation that the first sensing modes, the processing unit 140 of the present embodiment is to decide position of touch by sensing signal S1 and S2 that sensing cell 120 senses.That is to say, in the present embodiment, the first circuit 112 on touch-controlling interface 110 and the second circuit 114 are similar to the sense wire that extends along different directions on self-capacitance type touch-controlling interface.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 can be also the two feeling of independence measurement units that are respectively coupled to touch-controlling interface 110 and switch unit 130.
Fig. 2 is the block schematic diagram that the electronic touch device 100 of Fig. 1 is in the second sensing modes.For example, when the user wants to convert the multi-point touch pattern with execution greater functionality (for example form zooms in or out) to from the single-point touch pattern, processing unit 140 can output control signal SC1 switches to the second sensing modes with the touch-control sensing system 180 with electronic touch device 100, wherein touching signals SC1 is for example according to producing on the touch information on external command or touch-controlling interface 110, its be for example sensing signal S1 and S2 at least one of them.
For example, when processing unit 140 senses when on 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 to be controlling the switching of switch unit 130, and then touch-control sensing system 180 is switched to is for example the second sensing modes with multi-point touch function.In the present embodiment, the 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 detecting to change to 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 the 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 will drive signal SD by drive wire 162 and the second circuit 114 and be sent to touch-controlling interface 110.
Specifically, during operation, processing unit 140 at different time sequentially to each drive wire 162 output drive signal SD.Then, drive signal SD and be transferred into touch-controlling interface 110 by drive wire 162, switch unit 130 and the second circuit 114.Due to intersection (being sensing points SP) the meeting formation capacitive coupling node of the first circuit 112 and the second circuit 114, so the electric charge on the second circuit 114 can see through the 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 the first circuit 112 and sense sensing signal S1, and wherein sensing signal S1 is for example 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 driving signal SD that is coupled to the 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 touch object 170 with respect to the location coordinate of touch-controlling interface 110.
Similarly, when plural touch object is arranged 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 that drives 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 simultaneously or almost simultaneously touch-control events.In other words, the touch-control sensing system 180 of the electronic touch device 100 of Fig. 2 can detect a plurality of whiles, approach simultaneously or the touch-control event that occurs on touch-controlling interface 110 in cycle time.
Generally, when the user wants to convert multi-point touch pattern (for example form zooms in or out) when carrying out greater functionality to from the single-point touch pattern, the external command that the processing unit 140 of the present embodiment can be inputted according to the user or the touch information of touch-controlling interface 110 to switch unit 130 output control signal SC1 so that the second circuit 114 is coupled to each other with driver element 160.Wherein touch information is for example 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, to control the switching of 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 can transmit control signal SC1 to switch unit 130 so that touch-control sensing system 180 enters mutual capacitance sensing modes (being second sensing modes of the present embodiment).
On the other hand, when load bearing unit 150 is considered when automatically entering idle mode based on power saving, during load bearing unit 150 internal accounting, standby time and the SC1 that automatically transmits control signal are to switch unit 130, 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 the 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 sent by the outside to force touch-control sensing system 180 to use the self-tolerant sensing modes.
In other words, the touch-control sensing system 180 of the electronic touch device 100 of the present embodiment provides two kinds of sensing modes of self-capacitance and mutual capacitance, can select so that user or system to be provided the touch-control sensing pattern that is fit 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 is for example 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 the first sensing modes and the second sensing modes are respectively self-capacitance and mutual capacitance sensing modes in the present embodiment, yet in other embodiments, the first sensing modes and the 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 the present embodiment comprises the steps.At first, in step S110, according to control signal SC1, touch-control sensing system 180 is switched to the first sensing modes or the second sensing modes.Then, in step S120, when touch-control sensing system 180 is in the first sensing modes (for example self-capacitance sensing modes 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 the second sensing modes (for example mutual capacitance sensing modes shown in Figure 1), sensing cell 120 was according to driving signal SD sensing the first sensing signals (for example sensing signal SD1).
In addition, in other embodiments, sensing method of touch control comprises that also the touch information according to touch-controlling interface 180 produces control signal SC1, wherein above-mentioned touch information be for example the 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 an external command generation control signal SC1.Because the sensing method of touch control of the 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 the first sensing modes or the 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 the present situation of foundation provide user or system most suitable sensing modes.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.
Although the present invention discloses as above with embodiment; but it is not to limit 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 (17)
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 the 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 the second sensing modes, described sense unit one drives described the first sensing signal of signal sensing, wherein said at least one sensing cell couples described switch unit, and when described the first sensing modes described the second sensing signal of sensing.
2. 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 the first sensing signal of sensing; And
One second sensing cell couples described switch unit, and when described the first sensing modes described the second sensing signal of sensing.
3. touch-control sensing according to claim 1 system, is characterized in that, also comprises a driver element, couples described switch unit, and export described driving signal to described touch-controlling interface when described the second sensing modes according to described control signal.
4. 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.
5. touch-control sensing according to claim 4 system, is characterized in that, described touch information be described the first sensing signal and described the second sensing signal at least one of them.
6. touch-control sensing according to claim 1 system, is characterized in that, described control signal is to produce according to an external command.
7. 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.
8. 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 the 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 was in described the second sensing modes, described sense unit one drove described the first sensing signal of signal sensing; And
One processing unit couples described sensing cell and described switch unit, produces described control signal, and according to described the first sensing signal and described the second sensing signal, or described the first sensing signal determines at least one position of touch on described touch-controlling interface.
9. electronic touch device according to claim 8, is characterized in that, described processing unit produces described control signal according to a touch information of described touch-controlling interface.
10. electronic touch device according to claim 9, is characterized in that, described touch information be the first sensing signal and described the second sensing signal at least one of them.
11. electronic touch device according to claim 8 is characterized in that, described processing unit produces described control signal according to an external command.
12. electronic touch device according to claim 8 is characterized in that, described at least one sensing cell couples described switch unit, and when described the first sensing modes described the second sensing signal of sensing.
13. electronic touch device according to claim 8 is characterized in that, described at least one sensing cell comprises:
One first sensing cell couples described touch-controlling interface with described the first sensing signal of sensing; And
One second sensing cell couples described switch unit, and when described the first sensing modes described the second sensing signal of sensing.
14. electronic touch device according to claim 8, it is characterized in that, also comprise a driver element, couple described switch unit and described processing unit, export described driving signal to described touch-controlling interface when described the second sensing modes according to described control signal.
15. electronic touch device according to claim 8 is characterized in that, described switch unit comprise a microprocessor, a switchgear and an arithmetic logic unit at least one of them.
16. 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 the 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 the second sensing modes, drive described the first sensing signal of signal sensing according to one;
A touch information according to described touch-controlling interface produces described control signal, wherein said touch information be described the first sensing signal and described the second sensing signal at least one of them.
17. sensing method of touch control according to claim 16 is characterized in that, also comprises according to an external command producing described control signal.
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| CN102945110B (en) * | 2012-11-29 | 2016-01-27 | 旭曜科技股份有限公司 | The noise filtering method of capacitance type touch-control panel and system |
| CN103902113B (en) * | 2012-12-26 | 2017-05-24 | 联想(北京)有限公司 | Using method of capacitive touch screen and user equipment |
| TW201447703A (en) * | 2013-06-07 | 2014-12-16 | Wintek Corp | Touch apparatus and driving method thereof |
| KR102140791B1 (en) * | 2013-10-11 | 2020-08-03 | 삼성전자주식회사 | Touch Controller, Electronic Device and Display Device including Touch Controller, and Method for Touch Sensing |
| CN103631464A (en) * | 2013-10-28 | 2014-03-12 | 业成光电（深圳）有限公司 | Touch screen module and touch detection method |
| CN103699326B (en) * | 2013-12-27 | 2017-02-15 | 深圳天珑无线科技有限公司 | Touch processing method and terminal device |
| TWI512585B (en) * | 2014-03-07 | 2015-12-11 | Elan Microelectronics Corp | Capacitive touch panel and manufacture method thereof |
| US9996187B2 (en) * | 2015-05-28 | 2018-06-12 | Novatek Microelectronics Corp. | Touch control module for touch device and related touch control method |
| US10474288B2 (en) | 2015-05-28 | 2019-11-12 | Novatek Microelectronics Corp. | Touch control method for touch device |
| CN106843617B (en) * | 2017-01-13 | 2020-02-11 | 业成科技（成都）有限公司 | Touch control device |
| CN107454950B (en) * | 2017-07-20 | 2021-10-19 | 深圳市汇顶科技股份有限公司 | Method for detecting touch point and touch controller |
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