CN113179094A - Capacitive piezoelectric touch virtual key and design method thereof - Google Patents
Capacitive piezoelectric touch virtual key and design method thereof Download PDFInfo
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- CN113179094A CN113179094A CN202110401976.XA CN202110401976A CN113179094A CN 113179094 A CN113179094 A CN 113179094A CN 202110401976 A CN202110401976 A CN 202110401976A CN 113179094 A CN113179094 A CN 113179094A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 63
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/964—Piezoelectric touch switches
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Abstract
The invention relates to the technical field of virtual keys, in particular to a capacitive piezoelectric touch virtual key and a design method thereof, wherein a virtual key touch area is set on a dielectric layer through at least two rivets, a touch capacitor electrode is arranged on the upper surface of the dielectric layer in the virtual key touch area and is connected with the input end of a control circuit, a plurality of piezoelectric driving ceramic plates are arranged on the touch capacitor electrode and are connected with the output end of the control circuit, a plurality of piezoelectric energy collecting ceramic plates are arranged on the touch capacitor electrode and are connected with the input end of the control circuit; the invention simplifies the design of the mobile phone key, ensures that the surface exposed outside has no any bulge and design, avoids the defect of poor reliability of the traditional mechanical key, and has the advantages of low cost, low power consumption, visual and convenient use and simple and convenient structure.
Description
Technical Field
The invention relates to the technical field of virtual keys, in particular to a capacitive piezoelectric touch virtual key and a design method thereof.
Background
The touch key of the existing mobile equipment is designed by adopting a mechanical or plastic key all the time, the key of the type needs physical electrical contact to realize the key function, and a mechanical moving part is an indispensable part of the key of the type; this type of key has poor reliability and high accident rate due to the need for physical contact and mechanical movement. In addition, due to the addition of the touch key, the mobile device can generate concave-convex feeling when the finger slides the touch key, so that the touch position can be determined, which is contrary to the design of the existing protective shell.
In recent years, with the intensive research of intelligent equipment, touch screen keys have been widely applied, the keys of the type place key functions in a part of a display area, and do not need mechanical moving parts to realize the key functions, so that the reliability of the keys is greatly improved, and the available display area of a mobile phone is used to the maximum extent, so that the keys are not only used for displaying, but also used for recognizing related keys, handwriting and other strokes. However, the mobile phone key realized by the method has high cost and large power consumption, and the usable time of the mobile phone after charging is short; the touch screen is not as intuitive, simple and convenient to use as a traditional keyboard, and the function of the keys can be disabled when the touch screen is damaged; therefore, a large portion of smart devices still employ traditional mechanical keys.
Disclosure of Invention
Aiming at the defects, the invention adopts the piezoelectric ceramic piece as the piezoelectric component, realizes the functions of positioning the key position and adjusting the volume by vibrating touch through two piezoelectric effects of positive and negative piezoelectric effects of the piezoelectric ceramic, simplifies the design of the mobile phone key, ensures that the surface exposed outside does not have any bulge and design, avoids the defect of poor reliability of the traditional mechanical key, and has the advantages of low cost, low power consumption, visual and convenient use and simple and convenient structure.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a virtual button of capacitanc piezoelectricity touch, set for virtual button touch area (2) through two at least rivets (3) on dielectric layer (1), dielectric layer (1) upper surface in virtual button touch area (2) sets up touch capacitance electrode (4), touch capacitance electrode (4) are connected with control circuit input, set up a plurality of piezoelectricity drive potsherd (5) on touch capacitance electrode (4), piezoelectricity drive potsherd (5) are connected with the control circuit output, set up a plurality of piezoelectricity energy on touch capacitance electrode (4) and collect potsherd (6), piezoelectricity energy is collected potsherd (6) and is connected with control circuit's input.
The technical scheme of the invention is further improved as follows: the piezoelectric driving ceramic piece (5) has an inverse piezoelectric effect, a user abuts against the virtual key touch area (2), the touch capacitor electrode (4) receives signals and transmits the signals to the input end of the control circuit, the output end of the control circuit transmits signals to the piezoelectric driving ceramic piece (5), and the piezoelectric driving ceramic piece (5) vibrates to enable the virtual key touch area (2) to vibrate and the user abuts against the part to generate touch.
The technical scheme of the invention is further improved as follows: the virtual key touch area (2) is at least provided with two piezoelectric driving ceramic pieces (5), the two piezoelectric driving ceramic pieces (5) in the virtual key touch area (2) form a resonance mode with the same frequency and shape, the difference between the two piezoelectric driving ceramic pieces (5) in space and time is pi/2, so that a traveling wave is formed in the virtual key touch area (2), the traveling wave is an elastomer motion wave, and when a user butting part moves in the virtual key touch area (2), the traveling wave motion directions are the same or opposite, the user experiences different.
The technical scheme of the invention is further improved as follows: when a user slides in different directions in the virtual key touch area (2), different suppression effects can be generated on the traveling wave, so that the virtual key touch area (2) has different vibrations, and the piezoelectric energy collecting ceramic plate (6) has different collected signals, thereby adjusting the volume.
5. A design method for a capacitance type piezoelectric touch virtual key is characterized by comprising the following steps:
1) selecting the position, shape and size of a virtual key touch area (2) on the mobile equipment according to the use habits of a user;
2) selecting a dielectric layer (1) as a dielectric layer of a virtual key touch area (2), selecting a conductive material as a touch capacitance electrode (4), and selecting a piezoelectric ceramic material as a piezoelectric driving ceramic piece (5) and a piezoelectric energy collecting ceramic piece (6);
3) connecting the capacitance electrode corresponding to the virtual key touch area (2) to a corresponding input channel of a control circuit of the virtual key touch area (2);
4) the piezoelectric driving ceramic plate (6) which forms vibration touch feeling in the virtual key touch area (2) is connected to a corresponding output channel of the control circuit;
5) and connecting the piezoelectric energy collecting ceramic plates (6) in the virtual key touch area (2) to corresponding input channels of the control circuit.
The technical scheme of the invention is further improved as follows: in the step 2), the dielectric layer (1) is any one of an organic glass dielectric layer, an acrylic dielectric layer and a metal dielectric layer.
The technical scheme of the invention is further improved as follows: in the step 2), the conductive material ITO is a touch capacitance electrode (4), and the piezoelectric ceramic material PZT-5 piezoelectric ceramic piece is used as a piezoelectric driving ceramic piece (5) and a piezoelectric energy collecting ceramic piece (6).
Compared with the prior art, the capacitive piezoelectric touch virtual key and the design method thereof have the following beneficial effects:
1. the invention provides a capacitance type piezoelectric touch virtual key and a design method thereof, wherein the capacitance type piezoelectric touch virtual key mainly comprises a dielectric layer, a piezoelectric ceramic piece, a touch capacitance electrode and a control circuit, the touch capacitance electrode can be directly sprayed or printed on the dielectric layer by any conductive material, or a printed PCB (printed Circuit Board) is arranged below the dielectric layer, and the piezoelectric ceramic piece is adhered below the dielectric layer of a virtual key touch area, so that the piezoelectric ceramic piece is exposed on the outer surface without any bulge and design, thereby avoiding the defect of poor reliability of the traditional mechanical key, and keeping the advantages of low cost, small power consumption, visual and convenient use and simple and convenient construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a side frame of an intelligent device using a capacitive piezoelectric touch virtual key according to the present invention;
FIG. 2 is a schematic diagram of a structure of a capacitive piezoelectric tactile virtual key area in FIG. 1;
fig. 3 is a schematic wiring diagram of a piezoelectric driving ceramic plate and a piezoelectric energy collecting ceramic plate in a capacitive piezoelectric touch virtual key according to the present invention;
fig. 4 is a schematic diagram of a traveling wave generated by superposition of piezoelectric vibration modes.
Reference numbers in the figures: 1-a dielectric layer; 2-virtual key area; 3-riveting; 4-touch capacitive electrodes; 5-piezoelectric driving ceramic plate; 6-piezoelectric energy collecting ceramic plate.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, the capacitive piezoelectric touch virtual key is provided with a dielectric layer 1, a mobile phone frame, a piezoelectric driving ceramic plate 5, a piezoelectric energy collecting ceramic plate 6, a touch capacitor electrode 4 and a control circuit, wherein the touch capacitor electrode 4 is arranged in a capacitive piezoelectric touch virtual key area 2, the capacitive piezoelectric touch virtual key area 2 is fixed by two rivets 3, the piezoelectric driving ceramic plate 5 is arranged on the touch capacitor electrode 4, the piezoelectric energy collecting ceramic plate 6 is adhered on the touch capacitor electrode 4, the touch capacitor electrode 4 is connected with an input end of the control circuit, and the piezoelectric driving ceramic plate 5 and the piezoelectric energy collecting ceramic plate 6 are connected with an output end of the collecting control circuit; preferably, the dielectric layer 1 is any one of an organic glass dielectric layer, an acrylic dielectric layer and a metal dielectric layer; furthermore, the ITO which is the conductive material is a touch capacitance electrode (4), and the PZT-5 piezoelectric ceramic piece which is the piezoelectric ceramic material is used as a piezoelectric driving ceramic piece (5) and a piezoelectric energy collecting ceramic piece (6).
The capacitive piezoelectric tactile virtual key area 2 designed in the embodiment is a two-end fixed beam structure, the dielectric layer 1 is partially fixed by the rivet 3, when a user touches the capacitive piezoelectric tactile virtual key area 2, the touch capacitor electrode 4 generates a signal for an input channel of a control circuit, transmits an electrical signal from an output channel, and transmits the electrical signal to the piezoelectric driving ceramic piece 5, so that the piezoelectric driving ceramic piece 5 generates vibration, the capacitive piezoelectric tactile feedback virtual key area 2 is driven to vibrate, and the piezoelectric energy collection piezoelectric piece 6 is driven to vibrate due to the vibration generated by the touch key area 2; furthermore, the design structure is obtained by combining vibration mechanics and elastic mechanics related knowledge with ANSYS and other engineering software simulation calculation analysis, firstly, the dielectric layer 1 and the mobile phone frame material are determined, basic parameters such as the elastic modulus, the density, the size, the piezoelectric constant and the like of the material are obtained, then the inherent characteristics of the fixed beams at the two ends are calculated, the pasting position of the piezoelectric driving ceramic piece 5 is determined by combining the simulation analysis result of the engineering software, and finally the piezoelectric driving ceramic piece 5 is positioned at the wave crest and the wave trough of the inherent vibration mode of the fixed beams at the two ends during vibration excitation; two piezoelectric driving ceramic plates 5 are arranged in the capacitance type piezoelectric tactile feedback virtual key area 2, and by combining knowledge such as superposition analysis of waves, the same-frequency and same-shape resonance modes (standing waves) excited by the two piezoelectric driving ceramic plates 5 in the capacitance type piezoelectric tactile feedback virtual key area 2 have a pi/2 difference in space and time, the pi/2 difference in space is that the excitation positions of the two piezoelectric driving ceramic plates 5 in the virtual key area 2 have a lambda/4 difference, lambda is the wavelength, and the pi/2 difference in time is that the difference in time is 1/4 cycles, so that traveling waves can be generated in the capacitance type piezoelectric tactile feedback virtual key area 2; the traveling wave is a wave moving in the elastic body, when a user finger contacts the capacitance type piezoelectric tactile feedback virtual key area 2, piezoelectric vibration tactile sensation is generated, and when the touch movement of the user finger is consistent with the motion direction of the generated traveling wave, the touch sensation generated is different from that generated when the touch movement of the user finger is opposite to that generated. The piezoelectric energy collecting ceramic piece 6 uses the positive piezoelectric effect, when a finger slides in the virtual key area 2, different vibration suppression is caused because the finger slides along the traveling wave transmission direction and against the traveling wave transmission direction, so that electric signals generated by different energy collected by the piezoelectric energy collecting ceramic piece 6 are different, and the generated energy is transmitted to the control circuit, and thus the volume is adjusted.
The invention adopts a capacitive piezoelectric touch virtual key to replace a mechanical key, and the principle of the capacitive piezoelectric touch virtual key is that the corresponding capacitance value of the corresponding touched position is changed through the touch of a user finger, the capacitance change is detected by a control circuit of the capacitive piezoelectric touch virtual key, and an output circuit of the control circuit inputs an electric signal to a piezoelectric driving ceramic piece at the virtual key position, so that the virtual key position has inverse piezoelectric effect to generate vibration touch. The two piezoelectric driving ceramic plates are adopted, traveling waves are generated at the positions of the virtual keys, and therefore the vibration touch perception generated when a user slides upwards and slides downwards is different; when the fingers of the user slide along the traveling wave transmission direction and against the traveling wave transmission direction to cause different vibration suppression, and the piezoelectric effect is adopted, the piezoelectric energy collecting piezoelectric sheet collects different vibration signals, so that output electric signals generated by different collected energies are different, and the different electric signals are transmitted to the control circuit, so that the volume of the mobile phone is adjusted.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the appended claims.
Claims (7)
1. A virtual button of capacitanc piezoelectricity touch which characterized in that: the touch control device comprises a dielectric layer (1), a virtual key touch area (2) is set through at least two rivets (3), a touch capacitance electrode (4) is arranged on the upper surface of the dielectric layer (1) in the virtual key touch area (2), the touch capacitance electrode (4) is connected with the input end of a control circuit, a plurality of piezoelectric driving ceramic pieces (5) are arranged on the touch capacitance electrode (4), the piezoelectric driving ceramic pieces (5) are connected with the output end of the control circuit, a plurality of piezoelectric energy collecting ceramic pieces (6) are arranged on the touch capacitance electrode (4), and the piezoelectric energy collecting ceramic pieces (6) are connected with the input end of the control circuit.
2. The virtual key of claim 1, wherein: the piezoelectric driving ceramic piece (5) has an inverse piezoelectric effect, a user abuts against the virtual key touch area (2), the touch capacitor electrode (4) receives signals and transmits the signals to the input end of the control circuit, the output end of the control circuit transmits signals to the piezoelectric driving ceramic piece (5), and the piezoelectric driving ceramic piece (5) vibrates to enable the virtual key touch area (2) to vibrate and the user abuts against the part to generate touch.
3. The virtual key of claim 1, wherein: the virtual key touch area (2) is at least provided with two piezoelectric driving ceramic pieces (5), the two piezoelectric driving ceramic pieces (5) in the virtual key touch area (2) form a resonance mode with the same frequency and shape, the difference between the two piezoelectric driving ceramic pieces (5) in space and time is pi/2, so that a traveling wave is formed in the virtual key touch area (2), the traveling wave is an elastomer motion wave, and when a user butting part moves in the virtual key touch area (2), the traveling wave motion directions are the same or opposite, the user experiences different.
4. The virtual key of claim 3, wherein: when a user slides in different directions in the virtual key touch area (2), different suppression effects can be generated on the traveling wave, so that the virtual key touch area (2) has different vibrations, and the piezoelectric energy collecting ceramic plate (6) has different collected signals, thereby adjusting the volume.
5. A design method for a capacitance type piezoelectric touch virtual key is characterized by comprising the following steps:
1) selecting the position, shape and size of a virtual key touch area (2) on the mobile equipment according to the use habits of a user;
2) selecting a dielectric layer (1) as a dielectric layer of a virtual key touch area (2), selecting a conductive material as a touch capacitance electrode (4), and selecting a piezoelectric ceramic material as a piezoelectric driving ceramic piece (5) and a piezoelectric energy collecting ceramic piece (6);
3) connecting the capacitance electrode corresponding to the virtual key touch area (2) to a corresponding input channel of a control circuit of the virtual key touch area (2);
4) the piezoelectric driving ceramic plate (6) which forms vibration touch feeling in the virtual key touch area (2) is connected to a corresponding output channel of the control circuit;
5) and connecting the piezoelectric energy collecting ceramic plates (6) in the virtual key touch area (2) to corresponding input channels of the control circuit.
6. A design method of a capacitance type piezoelectric touch virtual key is characterized in that: in the step 2), the dielectric layer (1) is any one of an organic glass dielectric layer, an acrylic dielectric layer and a metal dielectric layer.
7. A design method of a capacitance type piezoelectric touch virtual key is characterized in that: in the step 2), the conductive material ITO is a touch capacitance electrode (4), and the piezoelectric ceramic material PZT-5 piezoelectric ceramic piece is used as a piezoelectric driving ceramic piece (5) and a piezoelectric energy collecting ceramic piece (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110401976.XA CN113179094B (en) | 2021-04-14 | 2021-04-14 | Capacitive piezoelectric touch virtual key and design method thereof |
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| CN202110401976.XA CN113179094B (en) | 2021-04-14 | 2021-04-14 | Capacitive piezoelectric touch virtual key and design method thereof |
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| CN113179094A true CN113179094A (en) | 2021-07-27 |
| CN113179094B CN113179094B (en) | 2024-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114428551A (en) * | 2021-12-29 | 2022-05-03 | 南京信息工程大学 | Device for generating local vibration on touch screen and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103338033A (en) * | 2013-06-05 | 2013-10-02 | 海芯科技(厦门)有限公司 | Capacitance-type touch keys applied to cell phones and a design method thereof |
| CN106775051A (en) * | 2016-11-15 | 2017-05-31 | 深圳天珑无线科技有限公司 | A kind of pressure sensitivity contact panel and pressure sensitivity contactor control device |
| CN110347249A (en) * | 2019-06-25 | 2019-10-18 | 燕山大学 | Based on modes superposition tactile feedback method |
| WO2019206280A1 (en) * | 2018-04-28 | 2019-10-31 | 北京钛方科技有限责任公司 | Control method for virtual keyboard |
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2021
- 2021-04-14 CN CN202110401976.XA patent/CN113179094B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103338033A (en) * | 2013-06-05 | 2013-10-02 | 海芯科技(厦门)有限公司 | Capacitance-type touch keys applied to cell phones and a design method thereof |
| CN106775051A (en) * | 2016-11-15 | 2017-05-31 | 深圳天珑无线科技有限公司 | A kind of pressure sensitivity contact panel and pressure sensitivity contactor control device |
| WO2019206280A1 (en) * | 2018-04-28 | 2019-10-31 | 北京钛方科技有限责任公司 | Control method for virtual keyboard |
| CN110347249A (en) * | 2019-06-25 | 2019-10-18 | 燕山大学 | Based on modes superposition tactile feedback method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114428551A (en) * | 2021-12-29 | 2022-05-03 | 南京信息工程大学 | Device for generating local vibration on touch screen and control method |
| CN114428551B (en) * | 2021-12-29 | 2024-02-06 | 南京信息工程大学 | Device for generating local vibration on touch screen and control method |
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