CN104731151A - Measuration and feedback circuit, measuration and feedback button and measuration and feedback method - Google Patents
Measuration and feedback circuit, measuration and feedback button and measuration and feedback method Download PDFInfo
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Abstract
The invention provides a measuration and feedback circuit, a measuration and feedback button and a measuration and feedback method. The measuration and feedback circuit, the measuration and feedback button and the measuration and feedback method are used for measuring an external force and outputting a vibration feedback. The measuration and the feedback circuit comprises piezoelectric materials and a control unit; the control unit is in a measuration mode at first and measures that whether the output voltage generated by the transformation of the piezoelectric materials under the action of the external force exceeds a preset voltage value or not, when the output voltage exceeds the preset voltage value, the control unit begins to time the preset measuration period of time and measures the output voltage continuously in the preset measurement period of time, the largest voltage value is obtained according to the change of the output voltage, the control unit outputs a feedback signal according to the largest voltage value, and the feedback signal is imposed on the piezoelectric materials to drive the piezoelectric materials to vibrate to output the vibration feedback. According to the measuration and feedback button, the space for the arrangement of a sensing module in a keyboard can be saved, and the production cost of the sensing module is reduced.
Description
Technical field
The present invention is relevant with piezoelectric (Piezoelectric material), particularly realizes the multistage about a kind of piezoelectric property by piezoelectric and inverse piezoelectric property and measures and the measurement of feedback and feedback circuit, measurement and feedback button and measurement and feedback method.
Background technology
In prior art, tri-state lock (Tri-state gate) usually can be used as and switch the measurement of piezoelectric and the element of feedback circuit.Under originally circuit is in measurement pattern, understands output voltage when piezoelectric is subject to External Force Acting and produces distortion, after amount of circuitry measures this output voltage, just can switch to output mode, and export actuated signal to piezoelectric, make it produce vibration.
But prior art does not clearly mention the complete control method of measurement about piezoelectric and feedback circuit, especially can start when piezoelectric exports activate by circuit to continue to produce signal, when cause circuit to learn needs to stop.In addition, measurement of the prior art and feedback circuit only can provide the input of the external force in single stage to measure and export with vibration feedback, and the feedback with varying strength or different types cannot be provided to export in response to the external force input of varying strength.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of and measures and feedback circuit, measurement and feedback button and measurement and feedback method, to improve the above-mentioned variety of problems that prior art suffers from.
A specific embodiment according to the present invention is a kind of measurement and feedback circuit, in order to measure external force and to export vibration feedback, comprises: piezoelectric, for producing output voltage when this piezoelectric material deforms; And control module, couple this piezoelectric; Wherein, this control module is initially in measurement pattern, and this control module measures this output voltage and whether exceedes preset voltage value; When this piezoelectric by this external force deformation and produce this output voltage exceed this preset voltage value time, this control module starts the timing predetermined measurement period, this control module continues to measure this output voltage in this predetermined measurement in the period, and obtains maximum voltage value according to the change of this output voltage; At the end of this predetermined measurement period, this control module switches to feedback pattern from this measurement pattern; Under this feedback pattern, this control module exports feedback signal according to this maximum voltage value, and this feedback signal is applied to this piezoelectric, makes this piezoelectric material vibration and exports this vibration feedback.
In an embodiment, when control module switches to feedback pattern from measurement pattern, control module starts the timing predetermined output period, and control module exports feedback signal to piezoelectric within the predetermined output period, at the end of the predetermined output period, control module can exit feedback pattern.
In an embodiment, piezoelectric corresponds to the deflection of piezoelectric by the output voltage that external force deformation produces, and the deflection of piezoelectric corresponds to external force.
In an embodiment, when maximum voltage value is the first voltage, the vibration of piezoelectric has the first vibration characteristics, when maximum voltage value is the second voltage, the vibration of piezoelectric has the second vibration characteristics, and one of them being selected from by vibration amplitude, vibration duration, vibration frequency and vibrational waveform of the first vibration characteristics and the second vibration characteristics is planted.
In an embodiment, control module is more coupled to output unit, and feedback signal is more applied to output unit by control module, orders about output unit and exports light feedback or sound feedback.
Another specific embodiment according to the present invention is a kind of measurement and feedback button, in this embodiment, measurement and feedback button are in order to measure external force and to export vibration feedback, measurement and feedback button comprise keycap, piezoelectric and control module, piezoelectric is arranged at below keycap, when keycap is by pressed by external force, can piezoelectric material deforms be caused and produce output voltage, control module couples piezoelectric, control module is initially in measurement pattern, control module starts the timing predetermined measurement period, control module continues to measure output voltage within the predetermined measurement period, and obtain maximum voltage value according to the change of output voltage, at the end of the predetermined measurement period, control module switches to feedback pattern from measurement pattern, under feedback pattern, control module exports feedback signal according to maximum voltage value, and feedback signal is applied to piezoelectric, order about piezoelectric material vibration and export vibration feedback and pass to keycap.
In an embodiment, control module measures output voltage and whether exceedes preset voltage value; When the output voltage that piezoelectric produces exceedes preset voltage value, control module starts the timing predetermined measurement period.
In an embodiment, measurement and feedback button also comprise keyboard coding circuit, keycap shows character symbol, when maximum voltage value is less than preset critical, the small letter font of keyboard coding circuit output word metasymbol, when maximum voltage value is more than or equal to preset critical, the capitalization font of keyboard coding circuit output word metasymbol.
In an embodiment, measurement and feedback button also comprise button electrode, and button electrode couples control module.When potential difference (PD) between piezoelectric and button electrode is non-vanishing, control module judges that keycap is not pressed; When potential difference (PD) between piezoelectric and button electrode is zero, control module judges that keycap is pressed.
In an embodiment, piezoelectric corresponds to the deflection of piezoelectric by the output voltage that external force deformation produces, and the deflection of piezoelectric corresponds to external force.
In an embodiment, when maximum voltage value is the first voltage, the vibration of piezoelectric has the first vibration characteristics; When maximum voltage value is the second voltage, the vibration of piezoelectric has the second vibration characteristics; One of them being selected from by vibration amplitude, vibration duration, vibration frequency and vibrational waveform of first vibration characteristics and the second vibration characteristics is planted.
In an embodiment, control module is more coupled to output unit, and feedback signal is more applied to output unit by control module, orders about output unit and exports light feedback or sound feedback.
Another specific embodiment according to the present invention is a kind of measurement and feedback method, and in this embodiment, measurement and feedback method are in order to measure external force and to export vibration feedback, and measurement and feedback method comprise the following step: (a) enters measurement pattern; B () starts the timing predetermined measurement period; C () continues the output voltage that measurement piezoelectric produces within the predetermined measurement period, wherein piezoelectric produces output voltage by external force deformation, and obtains maximum voltage value according to the change of output voltage; D (), at the end of the predetermined measurement period, switches to feedback pattern from measurement pattern; E (), under feedback pattern, exports feedback signal according to maximum voltage value; And feedback signal is applied to piezoelectric by (f), orders about piezoelectric material vibration and export vibration feedback.
In an embodiment, measurement and feedback method comprise the following step further: (b') is under measurement pattern, measure output voltage and whether exceed preset voltage value, when measurement be output voltage exceed preset voltage value time, start that timing is predetermined measures the period.
In an embodiment, measurement and feedback method comprise the following step further: when step (d) switches to feedback pattern from measurement pattern, start the timing predetermined output period; Feedback signal is exported within the predetermined output period; And at the end of the predetermined output period, exit feedback pattern.
In an embodiment, piezoelectric corresponds to the deflection of piezoelectric by the output voltage that external force deformation produces, and the deflection of piezoelectric corresponds to external force.
In an embodiment, when maximum voltage value is the first voltage, the vibration of piezoelectric has the first vibration characteristics; When maximum voltage value is the second voltage, the vibration of piezoelectric has the second vibration characteristics.One of them being selected from by vibration amplitude, vibration duration, vibration frequency and vibrational waveform of first vibration characteristics and the second vibration characteristics is planted.
In an embodiment, measurement and feedback method comprise the following step further: the vibration feedback exported by piezoelectric passes to the keycap be arranged at above piezoelectric.
In an embodiment, measurement and feedback method comprise the following step further: feedback signal is applied to output unit, order about output unit and export light feedback or sound feedback.
Compared to prior art, utilize the piezoelectric property of piezoelectric and inverse piezoelectric property to realize the multistage according to measurement of the present invention and feedback circuit and method and measure and concrete effect of feedback.In addition, can be applicable on the input media of such as keyboard according to measurement of the present invention and feedback button, external force can be completed owing to only needing same group of piezoelectric to measure and vibration feedback simultaneously, therefore space that sensing module is set in keyboard can be saved and reduce its production cost.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
Fig. 1 is the measurement of one embodiment of the invention and the functional block diagram of feedback circuit;
Fig. 2 is measurement in Fig. 1 and the functional block diagram of feedback circuit under measurement pattern;
Fig. 3 is the schematic diagram obtaining maximum voltage value according to the change situation of output voltage within the predetermined measurement period;
Fig. 4 is measurement in Fig. 1 and the functional block diagram of feedback circuit under feedback pattern;
Fig. 5 is that feedback signal is applied to output unit, to order about the schematic diagram that output unit exports the feedback of other patterns by measurement and feedback circuit;
Fig. 6 is provided with the measurement of piezoelectric and the explosive view of feedback button;
Fig. 7 is the measurement of another embodiment of the present invention and the process flow diagram of feedback method.
Embodiment
For making there is further understanding to object of the present invention, structure, feature and function thereof, embodiment is hereby coordinated to be described in detail as follows.
A specific embodiment according to the present invention is a kind of measurement and feedback circuit.In this embodiment, measurement and feedback circuit utilize the piezoelectric property of piezoelectric and inverse piezoelectric property to the external force measured suffered by piezoelectric and order about piezoelectric and export corresponding vibration feedback.
First, please refer to Fig. 1, Fig. 1 is the measurement of one embodiment of the invention and the functional block diagram of feedback circuit.As shown in Figure 1, measurement and feedback circuit 1 comprise piezoelectric PZ, path switching unit 10 and control module 12.Wherein, piezoelectric PZ couples path switching unit 10; Path switching unit 10 couples control module 12.
The control module 12 of measurement and feedback circuit 1 also comprises measurement unit 120, microprocessor 122 and driver element 124.Wherein, measurement unit 120 couples path switching unit 10 and microprocessor 122; Microprocessor 122 couples path switching unit 10, measurement unit 120 and driver element 124; Driver element 124 couples path switching unit 10 and microprocessor 122.
In this embodiment, piezoelectric PZ has two effects: (1) is under measurement pattern, corresponding output voltage is produced when piezoelectric PZ affords External Force Acting and is out of shape, and (2) are under feedback pattern, when piezoelectric PZ receives feedback signal driving, produce corresponding vibration feedback, this feedback signal may correspond to the maximum voltage value in output voltage.Path switching unit 10 in order to switch the unlike signal transmission path between piezoelectric PZ and control module 12 under measurement pattern or feedback pattern; Control module 12 is in order to the output voltage that measures piezoelectric produce under measurement pattern and obtain maximum voltage value according to the change of output voltage within the predetermined measurement period, and under feedback pattern, produces corresponding feedback signal according to maximum voltage value drive piezoelectric PZ to produce corresponding vibration feedback.
Next, by with regard to the measurement in this embodiment and feedback circuit 1, the operation situation under measurement pattern and feedback pattern is described in detail respectively.
As shown in Figure 2, when control module 12 is under measurement pattern, path switching unit 10 can switch the signal transmission path between piezoelectric PZ and control module 12, the measurement unit 120 in piezoelectric PZ and control module 12 is allowed to couple, the output voltage V making the measurement unit 120 in control module 12 can measure piezoelectric PZ to produce
oUT.
Under measurement pattern, measurement unit 120 first can measure the output voltage V that piezoelectric PZ produces
oUTwhether exceed preset voltage value, produce misoperation to avoid because of the background voltage value that has of piezoelectric PZ.In fact, this preset voltage value can be systemic presupposition or be set by user, there is no specific restriction.
If the output voltage V that the measurement of measurement unit 120 produces for piezoelectric PZ
oUTdo not exceed preset voltage value, then measurement unit 120 continues the output voltage V that measurement piezoelectric PZ produces
oUT; If the output voltage V that the measurement of measurement unit 120 produces for piezoelectric PZ
oUTexceed preset voltage value, represent piezoelectric PZ and be out of shape by the effect of external force F and produce enough large output voltage V
oUT, now measurement unit 120 can start the timing predetermined measurement period and continue to measure output voltage V within the predetermined measurement period
oUT, then by microprocessor 122 according to output voltage V
oUTchange situation within the predetermined measurement period obtains maximum voltage value.
For example, as shown in Figure 3, before the time 9 milliseconds (ms), owing to not being subject to pressed by external force, the output voltage V that piezoelectric PZ produces
oUTbe 0.In the moment that time 9ms is pressed, the output voltage V that piezoelectric PZ produces
oUTcan start to occur fierce change.If the output voltage V that piezoelectric PZ produces
oUTfor negative voltage, as output voltage V
oUTin time 10ms lower than preset voltage value-V
dtime, namely measurement unit 120 can start timing predetermined measurement period Δ T.Otherwise, if the output voltage V that piezoelectric PZ produces
oUTfor positive voltage, as output voltage V
oUTexceed preset voltage value V
dtime, measurement unit 120 also can start timing predetermined measurement period Δ T.That is, as long as the output voltage V produced as piezoelectric PZ
oUTabsolute value | V
oUT| be greater than preset voltage value V
dtime, namely measurement unit 120 can start timing predetermined measurement period Δ T.Suppose that the predetermined measurement period Δ T of measurement unit 120 timing is 10 milliseconds (ms), namely measurement unit 120 can continue to measure output voltage V in these 10 milliseconds
oUT, then by microprocessor 122 according to output voltage V
oUTchange situation in these 10 milliseconds obtains maximum voltage value V
mAX.
At the end of predetermined measurement period Δ T, namely control module 12 can switch to feedback pattern from measurement pattern originally, as shown in Figure 4, now path switching unit 10 can switch the signal transmission path between piezoelectric PZ and control module 12, allow the driver element 124 in piezoelectric PZ and control module 12 couple, make the driver element 124 in control module 12 that piezoelectric PZ can be driven to produce vibration feedback.
When microprocessor 122 obtains maximum voltage value V
mAXafter, microprocessor 122 can according to maximum voltage value V
mAXproduce corresponding feedback signal FB to driver element 124, and by driver element 124, feedback signal FB is applied to piezoelectric PZ, export corresponding vibration feedback VF to order about piezoelectric PZ to vibrate.
Table one
| Maximum voltage value V MAX | The vibration frequency of piezoelectric PZ |
| Be less than 0.3 volt | 150 hertz |
| 0.3 volt ~ 0.6 volt | 200 hertz |
| Be greater than 0.6 volt | 250 hertz |
Formula one: vibration duration (the millisecond)=maximum voltage value V of piezoelectric PZ
mAX(volt) * 100
In practical application, microprocessor 122 can produce corresponding to different maximum voltage value V according to look-up table (such as table one) or formula (such as formula one)
mAXfeedback signal FB, and the vibration ordering about piezoelectric PZ has corresponding vibration characteristics, to produce corresponding vibration feedback VF.It should be noted that, the vibration characteristics of piezoelectric PZ is not limited with above-mentioned vibration duration and vibration frequency, in fact can also be vibration amplitude (such as: maximum voltage value V
mAXhigher, then vibration amplitude is larger) or vibrational waveform is (such as: maximum voltage value V
mAXhigher, then vibrational waveform is more close to square wave), or the combination of above-mentioned change, specific restriction be there is no to vibration characteristics herein.
From the above: export due to distortion in various degree can be produced when the pattern of measurement lower piezoelectric material PZ is subject to the external force F effect of different size and there is different maximum voltage value V
mAXoutput voltage V
oUT, therefore measurement of the present invention and feedback circuit 1 can realize the measurement of multistage external force; In addition, measurement of the present invention and feedback circuit 1 can control piezoelectric PZ according to different maximum voltage value V under feedback pattern
mAX(that is external force F of different size) produces the vibration feedback VF with different vibration characteristics, therefore can realize multistage vibration feedback output.
It should be noted that, except above-mentioned vibration feedback, as shown in Figure 5, feedback signal FB also can be applied to output unit 2 by microprocessor 122 simultaneously, to order about the feedback that output unit 2 exports other different types, such as, order about output unit 2 and emit beam to export light feedback LF or order about output unit 2 to send the sound to export sound feedback SF.
Another specific embodiment according to the present invention is a kind of measurement and feedback button.In this embodiment, measurement and feedback button utilize the piezoelectric property of piezoelectric to export corresponding vibration feedback with inverse piezoelectric property to measure the suffered external force of piezoelectric and to order about piezoelectric.In fact, measurement and the feedback button of this embodiment can be applicable to any pressing type input device, such as keyboard, but not as limit.
Please refer to Fig. 6, Fig. 6 is provided with the measurement of piezoelectric and the explosive view of feedback button disclosed by CN103354185A patent application case.In measurement and feedback button 3, piezoelectric PZ to be arranged at below keycap 30 and between first circuit board 38 and second circuit board 39, first plate 34 and the second plate 36 stacked on top of each other, first circuit board 38 is folded between the first plate 34 and the second plate 36, second circuit board 39 relatively first circuit board 38 is arranged on base plate 32, and button electrode 37 to be arranged on second circuit board 39 and to be positioned at the below of piezoelectric PZ.Piezoelectric PZ and button electrode 37 couple control module (not shown) respectively.When potential difference (PD) between piezoelectric PZ and button electrode 37 is non-vanishing, the piezoelectric PZ that representative is arranged at below keycap 30 does not contact with the button electrode 37 below it by pressed by external force distortion, and control module can judge that keycap 30 is not pressed; When potential difference (PD) between piezoelectric PZ and button electrode 37 is zero, the piezoelectric PZ that representative is arranged at below keycap 30 contacts with the button electrode 37 below it by pressed by external force distortion, and control module can judge that keycap 30 is pressed.
It should be noted that, when keycap 30 is by pressed by external force, piezoelectric PZ can be caused to be out of shape and to produce output voltage.The control module be under measurement pattern can continue to measure the output voltage of piezoelectric PZ and obtain maximum voltage value according to the change of output voltage within the predetermined measurement period.Then, control module can switch to feedback pattern and export feedback signal to piezoelectric PZ according to maximum voltage value, exports vibration be fed back to keycap 30 to order about piezoelectric PZ to vibrate.If now namely user's finger presses can experience this vibration feedback on keycap 30.
In addition, above-mentioned measurement and feedback button 3 also can comprise keyboard coding circuit (not shown) further.When the hand of user presses the measurement and feedback button 3 that are arranged on keyboard, suppose measure and feedback button 3 keycap 30 on show character symbol (such as English alphabet A), when maximum voltage value is less than preset critical, keyboard coding circuit can export the small letter font of this character symbol (the small letter font of such as English alphabet A a); When maximum voltage value is more than or equal to preset critical, keyboard coding circuit can export the capitalization font (the capitalization font A of such as English alphabet A) of this character symbol.In fact, this preset critical can be systemic presupposition or be set by user, there is no specific restriction.
Another specific embodiment according to the present invention is a kind of measurement and feedback method.In this embodiment, measurement and feedback method utilize the piezoelectric property of piezoelectric to vibrate feedback with inverse piezoelectric property to measure external force and to export.In fact, the measurement of this embodiment and feedback method can be applicable to any pressing type input device, such as keyboard, but not as limit.
Please refer to Fig. 7, Fig. 7 illustrates the measurement of this embodiment and the process flow diagram of feedback method.As shown in Figure 7, first, in step S10, the method enters measurement pattern.In step S11, the method measures the output voltage that piezoelectric produces and whether exceedes preset voltage value under measurement pattern.In fact, this preset voltage value can be systemic presupposition or be set by user, there is no specific restriction.
It should be noted that, because piezoelectric has piezoelectric property, therefore it produces output voltage by external force deformation.More specifically, piezoelectric corresponds to the deflection of piezoelectric by the output voltage that external force deformation produces, and the deflection of piezoelectric corresponds to external force.That is, when external force suffered by piezoelectric is larger, the deflection of piezoelectric can be larger and its output voltage produced also can be larger; Vice versa.
If the measurement of step S11 is yes, that is the output voltage that piezoelectric produces exceedes preset voltage value, then the method sequentially performs step S12 and S13, and timing from very first time T1=0 also continues measure the output voltage that produces of piezoelectric and obtain maximum voltage value according to its change.If the measurement of step S11 is no, that is the output voltage that piezoelectric produces does not exceed preset voltage value, then the method re-executes step S11.
In step S14, the method judges whether very first time T1 is greater than the predetermined measurement period.If the judged result of step S14 is yes, that is very first time T1 has been greater than the predetermined measurement period, then the method performs step S15, switches to feedback pattern from measurement pattern originally.If the judged result of step S14 is no, that is very first time T1 is not greater than the predetermined measurement period, then the method continues to perform step S13.In fact, this predetermined measurement period can be systemic presupposition or be set by user, there is no specific restriction.
In step S16, the method determines corresponding feedback signal according to maximum voltage value under feedback pattern.Then, the method sequentially performs step S17 and S18, and timing from the second time T2=0 also exports the corresponding feedback signal that step S16 determines.
In step S19, the method judges whether the second time T2 is greater than the predetermined output period.If the judged result of step S19 is yes, that is the second time T2 has been greater than the predetermined output period, represents feedback signal and has exported complete, then the method performs step S20, exits feedback pattern.If the judged result of step S19 is no, that is the second time T2 is not greater than the predetermined output period, represents feedback signal and not yet exports complete, then the method continues to perform step S18.In fact, this predetermined output period can be systemic presupposition or be set by user, there is no specific restriction.It should be noted that, after the method exits feedback pattern in step S20, the measurement pattern of the method changeable time script, but not as limit.
It should be noted that, the method export the feedback signal corresponding to maximum voltage value and can be applied to piezoelectric, use and order about piezoelectric and produce corresponding vibration and export vibration feedback.In practical application, when maximum voltage value is the first voltage, the vibration of piezoelectric has the first vibration characteristics; When maximum voltage value is the second voltage, the vibration of piezoelectric has the second vibration characteristics.
The first above-mentioned vibration characteristics and the second vibration characteristics can be vibration amplitude, vibration duration, vibration frequency or vibrational waveform.If for vibration duration, when maximum voltage value is 1 volt, the vibration duration of piezoelectric is 0.3 second; When maximum voltage value is 2 volts, the vibration duration of piezoelectric is 0.6 second.Because maximum voltage value also corresponds to the size of external force suffered by piezoelectric, therefore, when the external force being pressed into piezoelectric is larger, corresponding maximum voltage value is also comparatively large, and the duration of the vibration feedback that piezoelectric produces is also longer; Vice versa.
In fact, above-mentioned measurement and feedback method also can be applicable to button.In an embodiment, piezoelectric is arranged at below the keycap of button.When exporting vibration feedback when piezoelectric material vibration, its vibration feedback can pass to the keycap be arranged at above piezoelectric, makes the user's finger pressed on the keycap of button can experience this vibration feedback.
In addition, except driving piezoelectric to produce except vibration feedback, feedback signal also can be applied to output unit by the method, and to order about the feedback that output unit exports other patterns, such as emitting beam to export light feedback or send the sound exports sound feedback.
Compared to prior art, utilize the piezoelectricity of piezoelectric and inverse piezoelectric property to realize the multistage according to measurement of the present invention and feedback circuit and method and measure and concrete effect of feedback.In addition, can be applicable on the input media of such as keyboard according to measurement of the present invention and feedback button, external force can be completed owing to only needing same group of piezoelectric to measure and vibration feedback simultaneously, therefore space that sensing module is set in keyboard can be saved and reduce its production cost.
By the above detailed description of preferred embodiments, it is desirable to clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, category of the present invention is limited.On the contrary, its objective is that hope can be contained in the category being arranged in claims of the present invention of various change and tool equality.
Claims (19)
1. measure and a feedback circuit, in order to measure external force and to export vibration feedback, it is characterized in that this measurement and feedback circuit comprise:
Piezoelectric, for producing output voltage when this piezoelectric material deforms; And
Control module, couples this piezoelectric;
Wherein, this control module is initially in measurement pattern, and this control module measures this output voltage and whether exceedes preset voltage value;
When this piezoelectric by this external force deformation and produce this output voltage exceed this preset voltage value time, this control module starts the timing predetermined measurement period, this control module continues to measure this output voltage in this predetermined measurement in the period, and obtains maximum voltage value according to the change of this output voltage;
At the end of this predetermined measurement period, this control module switches to feedback pattern from this measurement pattern; Under this feedback pattern, this control module exports feedback signal according to this maximum voltage value, and this feedback signal is applied to this piezoelectric, makes this piezoelectric material vibration and exports this vibration feedback.
2. measurement as claimed in claim 1 and feedback circuit, it is characterized in that when this control module switches to this feedback pattern from this measurement pattern, this control module starts the timing predetermined output period, this control module exports this feedback signal to this piezoelectric in this predetermined output in the period, at the end of this predetermined output period, this control module exits this feedback pattern.
3. measurement as claimed in claim 1 and feedback circuit, it is characterized in that this piezoelectric corresponds to the deflection of this piezoelectric by this output voltage that this external force deformation produces, and the deflection of this piezoelectric corresponds to this external force.
4. measurement as claimed in claim 1 and feedback circuit, it is characterized in that when this maximum voltage value is the first voltage, the vibration of this piezoelectric has the first vibration characteristics, when this maximum voltage value is the second voltage, the vibration of this piezoelectric has the second vibration characteristics, and this first vibration characteristics and this second vibration characteristics are selected from one of them kind of vibration amplitude, vibration duration, vibration frequency and vibrational waveform.
5. measurement as claimed in claim 1 and feedback circuit, it is characterized in that this control module is coupled to output unit, this feedback signal is applied to this output unit by this control module, orders about this output unit and exports light feedback or sound feedback.
6. measure and a feedback button, in order to measure external force and to export vibration feedback, it is characterized in that this measurement and feedback button comprise:
Keycap;
Piezoelectric, is arranged at below this keycap, when this keycap is by this pressed by external force, can causes this piezoelectric material deforms and produce output voltage; And
Control module, couples this piezoelectric;
Wherein, this control module is initially in measurement pattern, and this control module starts the timing predetermined measurement period, and this control module continues to measure this output voltage in this predetermined measurement in period, and obtains maximum voltage value according to the change of this output voltage;
At the end of this predetermined measurement period, this control module switches to feedback pattern from this measurement pattern; Under this feedback pattern, this control module exports feedback signal according to this maximum voltage value, and this feedback signal is applied to this piezoelectric, orders about this piezoelectric material vibration and exports this vibration feedback and pass to this keycap.
7. measurement as claimed in claim 6 and feedback button, is characterized in that this control module measures this output voltage and whether exceedes preset voltage value; When this output voltage that this piezoelectric produces exceedes this preset voltage value, this control module starts this predetermined measurement period of timing.
8. measurement as claimed in claim 6 and feedback button, it is characterized in that this measurement and feedback button also comprise keyboard coding circuit, this keycap shows character symbol, when this maximum voltage value is less than preset critical, this keyboard coding circuit exports the small letter font of this character symbol, when this maximum voltage value is more than or equal to this preset critical, this keyboard coding circuit exports the capitalization font of this character symbol.
9. measurement as claimed in claim 6 and feedback button, it is characterized in that this measurement and feedback button also comprise button electrode, this button electrode couples this control module, when potential difference (PD) between this piezoelectric and this button electrode is non-vanishing, this control module judges that this keycap is not pressed, when potential difference (PD) between this piezoelectric and this button electrode is zero, this control module judges that this keycap is pressed.
10. measurement as claimed in claim 6 and feedback button, it is characterized in that this piezoelectric corresponds to the deflection of this piezoelectric by this output voltage that this external force deformation produces, and the deflection of this piezoelectric corresponds to this external force.
11. measure and feedback button as claimed in claim 6, it is characterized in that when this maximum voltage value is the first voltage, the vibration of this piezoelectric has the first vibration characteristics, when this maximum voltage value is the second voltage, the vibration of this piezoelectric has the second vibration characteristics, and this first vibration characteristics and this second vibration characteristics are selected from one of them kind of vibration amplitude, vibration duration, vibration frequency and vibrational waveform.
12. measure and feedback button as claimed in claim 6, and it is characterized in that this control module is also coupled to output unit, this feedback signal is applied to this output unit by this control module, order about this output unit and export light feedback or sound feedback.
13. 1 kinds measure and feedback method, in order to measure external force and to export vibration feedback, it is characterized in that this measurement and feedback method comprise the following step:
A. measurement pattern is entered;
B. the timing predetermined measurement period is started;
C. within this predetermined measurement period, continue the output voltage that measurement piezoelectric produces, wherein this piezoelectric produces this output voltage by this external force deformation, and obtains maximum voltage value according to the change of this output voltage;
D., at the end of this predetermined measurement period, feedback pattern is switched to from this measurement pattern;
E., under this feedback pattern, feedback signal is exported according to this maximum voltage value; And
F. this feedback signal is applied to this piezoelectric, orders about this piezoelectric material vibration and export this vibration feedback.
14. measure and feedback method as claimed in claim 13, it is characterized in that this measurement and feedback method also comprise step (b'), under this measurement pattern, measure this output voltage and whether exceed preset voltage value, when measurement exceedes this preset voltage value for this output voltage, start this predetermined measurement period of timing.
15. measure and feedback method as claimed in claim 13, it is characterized in that this measurement and feedback method also comprise the following step:
When step (d) switches to this feedback pattern from this measurement pattern, start the timing predetermined output period;
This feedback signal is exported in this predetermined output in the period; And
At the end of this predetermined output period, exit this feedback pattern.
16. measure and feedback method as claimed in claim 13, it is characterized in that this piezoelectric corresponds to the deflection of this piezoelectric by this output voltage that this external force deformation produces, and the deflection of this piezoelectric correspond to this external force.
17. measure and feedback method as claimed in claim 13, it is characterized in that when this maximum voltage value is the first voltage, the vibration of this piezoelectric has the first vibration characteristics, when this maximum voltage value is the second voltage, the vibration of this piezoelectric has the second vibration characteristics, and this first vibration characteristics and this second vibration characteristics are selected from one of them kind of vibration amplitude, vibration duration, vibration frequency and vibrational waveform.
18. measure and feedback method as claimed in claim 13, it is characterized in that this measurement and feedback method also comprise the following step:
This vibration feedback exported by this piezoelectric passes to the keycap be arranged at above this piezoelectric.
19. measure and feedback method as claimed in claim 13, it is characterized in that this measurement and feedback method also comprise the following step:
This feedback signal is applied to output unit, orders about this output unit and export light feedback or sound feedback.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027886.3A CN104731151B (en) | 2015-01-20 | 2015-01-20 | Measuration and feedback circuit, measuration and feedback button and measuration and feedback method |
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| CN201510027886.3A CN104731151B (en) | 2015-01-20 | 2015-01-20 | Measuration and feedback circuit, measuration and feedback button and measuration and feedback method |
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| CN104731151A true CN104731151A (en) | 2015-06-24 |
| CN104731151B CN104731151B (en) | 2017-02-22 |
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| CN201510027886.3A Active CN104731151B (en) | 2015-01-20 | 2015-01-20 | Measuration and feedback circuit, measuration and feedback button and measuration and feedback method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111725018A (en) * | 2020-06-22 | 2020-09-29 | Oppo广东移动通信有限公司 | Key, control circuit and electronic equipment |
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| CN104731151B (en) | 2017-02-22 |
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