CN108768207A - Touch device - Google Patents
Touch device Download PDFInfo
- Publication number
- CN108768207A CN108768207A CN201810549291.8A CN201810549291A CN108768207A CN 108768207 A CN108768207 A CN 108768207A CN 201810549291 A CN201810549291 A CN 201810549291A CN 108768207 A CN108768207 A CN 108768207A
- Authority
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- China
- Prior art keywords
- piezoelectric layer
- touch device
- opening
- light
- plate body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 3
- 230000003760 hair shine Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 240000001439 Opuntia Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 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 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
- H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/181—Circuits; Control arrangements or methods
Abstract
This exposure proposes a kind of touch device, including shell, the first piezoelectric layer, the second piezoelectric layer, display board, light-emitting component and controller.Shell has a plate body.First piezoelectric layer is set to below plate body, and the first piezoelectric layer has the first opening.Second piezoelectric layer is set to below the first piezoelectric layer, and with the second opening, the second open communication first opening.Display board is set in the first opening, and exposed from plate body.Light-emitting component is set in shell, and below display board.Controller is electrically connected the first piezoelectric layer, the second piezoelectric layer and light-emitting component.It is open by being reserved between two piezoelectric layers so that the center of pressing area, which can be formed, is evident that viewing area, and is also further applicable in dark place as pressing feedback by luminous mode.
Description
Technical field
This exposure is about a kind of touch device.
Background technology
Push button touch device is widely used in every field.Common mechanical botton structure is through spring, bullet
The resetting-mechanisms such as piece reach pressing function.However resetting-mechanism will produce elastic fatigue under being used for a long time, and to start-up circuit
If contact membranes between have foreign body intrusion, will produce and accidentally touch (false triggering) or the insensitive problem of reaction.
Generally speaking, the service life of mechanical type touch-control device is limited to the above problem and is difficult to improve.
Invention content
This exposure proposes a kind of touch device, including shell, the first piezoelectric layer, the second piezoelectric layer, display board, light-emitting component
And controller.Shell has a plate body.First piezoelectric layer is set to below plate body, and the first piezoelectric layer has the first opening.The
Two piezoelectric layers are set to below the first piezoelectric layer, and with the second opening, the second open communication first opening.Display board is set to
In first opening, and it is exposed from plate body.Light-emitting component is set in shell, and below display board.Controller is electrically connected
First piezoelectric layer, the second piezoelectric layer and light-emitting component.
In some embodiments, controller configuration makes the first piezoelectric layer to export the first electric signal to the first piezoelectric layer
The first seismic wave is sent out, the first seismic wave is transferred to plate body.
In some embodiments, the first seismic wave is transferred to the second piezoelectric layer by plate body, and the configuration of the second piezoelectric layer is with by the
One seismic wave is converted to the second electric signal.
In some embodiments, controller configuration is turned on and off light-emitting component with the variation according to the second electric signal.
In some embodiments, shell further includes boss, and light-emitting component is set on boss.
In some embodiments, the first opening is less than the second opening.
In some embodiments, the first piezoelectric layer and the second piezoelectric layer are annular, and the first piezoelectric layer completely covers
Second piezoelectric layer.
In some embodiments, display board 120 includes transparent area and opaque area, which surrounds the light transmission
Area.
In some embodiments, substantially aligned first opening of light-emitting component or the second opening.
In some embodiments, the first piezoelectric layer is electrically connected to first electrode, and the second piezoelectric layer is electrically connected to
Two electrodes, the first piezoelectric layer and the second piezoelectric layer are electrically connected to common electrode together.
In conclusion in conclusion this exposure proposes a kind of touch device, by the piezoelectricity effect between two piezoelectric layers
Should whether depressed to detect touch device.The resetting-mechanisms such as spring, shrapnel are omitted in present embodiment, solve long-term
The problem of may will produce elastic fatigue using lower touch device.Further, since and the circuit film of contact is not used to start
Circuit also solves the problems, such as to may result in foreign body intrusion touch device and accidentally touches or react insensitive, significantly increases
The service life of touch device.In addition, by opening is reserved between two piezoelectric layers so that the center of pressing area can be with
Formation is evident that viewing area, and is also further applicable in dark place as pressing feedback by luminous mode.
Description of the drawings
Fig. 1 is painted the stereogram of the touch device according to one embodiment of this exposure.
Fig. 2 is painted in Fig. 1 along the sectional view of line segment 2-2.
Fig. 3 is painted the bottom view of Fig. 2 partial elements.
Fig. 4 is painted the bottom view of Fig. 2 partial elements.
Fig. 5 A draw the vertical view of the display board according to one embodiment of this exposure.
Fig. 5 B draw according to this disclose another embodiment display board vertical view.
Fig. 6 is painted handles the first electric signal, the second electric signal and third according to the controller of one embodiment of this exposure
The flow chart of electric signal.
Fig. 7 is painted third electric signal as user presses and change the schematic diagram of current potential.
Reference numeral：
100：Touch device
110：Shell
111：Plate body
111a：Plate body is open
112：Side wall
113：Boss
120：Display board
120a：Transparent area
120b：Opaque area
130：First piezoelectric layer
130a：First opening
140：Second piezoelectric layer
140a：Second opening
150：Light-emitting component
160：Controller
2-2：Line segment
S1：First electric signal
S2：Second electric signal
S3：Third electric signal
RX：Receiving electrode
TX：Carry electrode
V1：Voltage
V2：Voltage
W1：First seismic wave
GND：Grounding electrode
Specific implementation mode
A plurality of embodiments of the present invention will be disclosed with schema below, it is as clearly stated, thin in many practices
Section will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.?
That is in some embodiments of the present invention, the details in these practices is non-essential.In addition, for the sake of simplifying schema,
Some known usual structures will be painted it in a manner of simply illustrating in the drawings with element.Also, unless otherwise indicated,
Identical component symbol can be considered corresponding element in different drawings.Being painted for these schemas is to express these in order to clear
Connection relation in embodiment between each element is not painted the actual size of each element.
Fig. 1 is please referred to, the stereogram of the touch device 100 according to one embodiment of this exposure is painted.As shown in Figure 1,
Touch device 100 from the appearance from the point of view of include shell 110 and display board 120, wherein shell 110 have plate body 111 and
Side wall 112.The tool of plate body 111 is open 111a there are one plate body, and display board 120 is set among plate body opening 111a, and from plate body
It is exposed in 111.Display board 120 has transparent area 120a and opaque area 120b, when user presses near display board 120
Region, the part of transparent area 120a can light, as triggering feedback.
Next Fig. 2 is please referred to, be painted in Fig. 1 along the sectional view of line segment 2-2.As shown in Fig. 2, touch device 100
Also include the first piezoelectric layer 130, the second piezoelectric layer 140, shine member other than including shell 110 and display board 120
Part 150 and controller 160.First piezoelectric layer 130 is set to 111 lower section of plate body, and with the first opening 130a.Second piezoelectricity
Layer 140 is set to 130 lower section of the first piezoelectric layer, and with the second opening 140a, second opening 140a the first openings of connection 130a.
Display board 120 is also provided in addition to being set within plate body opening 111a in the first opening 130a of the first piezoelectric layer 130.Hair
Optical element 150 is set in shell 110, and substantially aligned first opening 130a or the second opening 140a.That is, the member that shines
In the space that part 150 is located at the first opening 130a or the second opening 140a institutes upright projection goes out.Controller 160 is electrically connected to
One piezoelectric layer 130, the second piezoelectric layer 140 and light-emitting component 150.By the above configuration, controller 160 may determine that user is
It is no to press display board 120, and it is turned on and off light-emitting component 150 according to this, to control the bright dark of transparent area 120a (see Fig. 1).
As shown in Fig. 2, the first piezoelectric layer 130 and the second piezoelectric layer 140 in present embodiment are by piezoelectric material
(piezoelectric material) makes, such as lead zirconate titanate (Pb (ZrTi) O3, PZT).Mechanical energy can pass through pressure with electric energy
The piezoelectric effect of electric material is converted mutually.Specifically, in the present embodiment, controller 160 is configured to input the first telecommunication
Number S1 makes the first piezoelectric layer 130 generate the first seismic wave W1 to the first piezoelectric layer 130.First electric signal S1 determines that piezoelectricity is imitated
The vibration amplitude and frequency of the first seismic wave W1 produced by answering.In the present embodiment, the voltage pattern of the first electric signal S1 is presented
The period wave (such as continuous string wave, square wave or triangular wave) of rule, and accordingly generate the first seismic wave W1 of rule.
It can be electrically connected by carry electrode TX and grounding electrode GND between controller 160 and the first piezoelectric layer 130, and
Potential difference between carry electrode TX and grounding electrode GND can cause the first piezoelectric layer 130 to generate deformation a little.In the first telecommunication
Number S1 is presented in the situation of period wave, and the first piezoelectric layer 130 can generate the first seismic wave W1 with the contraction of time cycle property.
In the present embodiment, it is fixed by colloid between the first piezoelectric layer 130 and plate body 111.First piezoelectric layer 130 is produced
The first raw seismic wave W1 can be directed through colloid and be transferred to plate body 111, and the first partial seismic wave W1 can be reflected by plate body 111,
And it is received by the second piezoelectric layer 140.Then the first seismic wave W1 is converted to voltage (second by the second piezoelectric layer 140 by piezoelectric effect
Electric signal S2) and it is transferred to controller 160.
It can be connect with grounding electrode GND by receiving electrode RX between controller 160 and the second piezoelectric layer 140.Namely
It says, in the present embodiment, receiving electrode RX and carry electrode TX shares the same grounding electrode GND and is used as with reference to electrode.And
After second piezoelectric layer 140 receives the first seismic wave W1, it can be produced between receiving electrode RX and grounding electrode GND caused by deformation a little
Raw potential difference, the second electric signal S2 of this potential difference, that is, above-mentioned.
In general, when making the first piezoelectric layer 130 and the second piezoelectric layer 140 using the material of direct piezoelectric effect, machine
Positive correlation can be presented with the first electric signal S1 or the second electric signal S2 in the intensity of tool power.That is, the first electric signal S1's shakes
Width is bigger, and the first seismic wave W1 also can be bigger；And the first seismic wave W1 is bigger, the second electric signal S2 is also bigger.
When external object (finger as shown in Figure 1) touches the plate of display board 120 or 130 upper area of the first piezoelectric layer
When body 111, the first seismic wave W1 of part can be transferred to external object, and make the first seismic wave for being reflected back the second piezoelectric layer 140
W1 is reduced.In this case, the second electric signal S2 can weaken therewith.Therefore monitor the second electric signal S2's by controller 160
Size, you can judge whether external object presses touch device 100.
Therefore, the intensity of the second electric signal S2 is relatively low when being pressed in the present embodiment, and the second electricity when not being pressed
The intensity of signal S2 is higher.For example, when the size for the second electric signal S2 that controller 160 monitors is less than whithin a period of time
When one scheduled threshold values, that is, judge that touch device 100 is depressed in this time, and is turned on and off the member that shines accordingly
Part 150.Specifically, controller 160 sends third electric signal S3 to light-emitting component 150, to close or open light-emitting component
150.This field personage can go the size of adjustment threshold values or the length of this time, this exposure not to exist according to practice demand
This is limited.
As shown in the above, the first piezoelectric layer 130 determines touch device 100 for the region of triggering.Second piezoelectricity
Layer 140 is then monitoring whether the first seismic wave W1 that the first piezoelectric layer 130 is sent out is absorbed by external object.Therefore this field
Personage can also adjust the external form and area of the first piezoelectric layer 130 and the second piezoelectric layer 140 according to practice demand, to produce phase
The press-button structure answered.
Fig. 3 is for example can refer to, the bottom view of Fig. 2 partial elements is painted.Specifically Fig. 3 can be considered as first
The bottom view of piezoelectric layer 130 and the second piezoelectric layer 140.In the present embodiment, the first piezoelectric layer 130 and the second piezoelectric layer 140
Annular is presented, and the first opening 130a is also smaller than the second opening 140a.If from the point of view of top surface, the first piezoelectric layer 130 has been understood
It is whole to cover the second piezoelectric layer 140.By the above configuration, the second pressure can be saved in the case of possessing maximum triggering area
The material of electric layer 140.
Next Fig. 4 is please referred to, is painted the bottom view of Fig. 2 partial elements.Fig. 4 can be considered as light-emitting component 150 with
And the bottom view of part enclosure 110.As shown in Fig. 2 and Fig. 4, shell 110 further includes boss 113, for the member that shines
Part 150 is arranged on.Light-emitting component 150 is configured to emit beam towards display board 120.Specifically, light-emitting component 150 can
To be Organic Light Emitting Diode (organic light emitting diode, OLED), various metal filament lamp or can send out
Go out the element of various coloured light.
As shown in Fig. 2, in the present embodiment, the size of light-emitting component 150 is less than the size of display board 120.In order to true
Protecting the light that light-emitting component 150 is sent out can uniformly make the transparent area 120a (see Fig. 1) of display board 120 bright, display board 120
It itself can include the design of light guide (light guide) or optical film (light diffuser).
In addition to this, the transparent area 120a of display board 120 and opaque area 120b can there are many shape-designings, not with
Institute mapper is limited in Fig. 1.Select the transparent area 120a of appropriate shape according to using situation, can allow user understand rapidly by
The function that pressure touch device 100 can be reached.
It for example, can be with reference chart 5A and Fig. 5 B.Fig. 5 A draw the display board 120 according to one embodiment of this exposure
Vertical view.Fig. 5 B draw according to this disclose another embodiment display board 120 vertical view.Transparent area in the example of Fig. 5 A
120a is the mark of a power switch, and user will recognize that power supply can be opened or be closed to pressing touch device 100.And scheme
Transparent area 120a is the design of plus sige type in the example of 5B, and user will recognize that pressing touch device 100 according to using situation
The effect that can reach.For example, in the example applied to sound equipment, user will be easy to guess case pressure touch device 100
Volume can be increased.
Next it can refer to Fig. 6.Fig. 6 is painted handles the first electric signal according to the controller 160 of one embodiment of this exposure
The flow chart of S1, the second electric signal S2 and third electric signal S3.As shown in fig. 6, controller 160 emits the first electric signal S1 extremely
The electrode TX of first piezoelectric layer 130, and the first piezoelectric layer 130 is made to generate the first seismic wave W1.First seismic wave W1 is transferred to thereafter plate
The second piezoelectric layer 140 is reflected back toward after body 111, the first seismic wave W1 is converted to the second electric signal S2 by the second piezoelectric layer 140, and thoroughly
Second electric signal S2 is passed to controller 160 by the electrode RX for crossing the second piezoelectric layer 140.Controller 160 sends out according to setting
Three electric signal S3 are to light-emitting component 150.In the present embodiment, light-emitting component 150 will be switched by pressing touch device 100 every time
Switch.That is, pressing touch device 100, third electric signal S3 will change current potential every time, and light-emitting component 150
Luminance can be changed in response to current potential.
Specifically third electric signal S3 can be painted as user presses and change the signal of current potential with reference chart 7
Figure.In a wherein embodiment as shown in Figure 7, in the case of controller 160 judges that touch device 100 is not touched, third
Electric signal S3 is maintained at voltage V1, and after controller 160 judges that touch device 100 is touched, third electric signal S3 is reduced
To voltage V2.In another embodiment shown in the figure 7, voltage V1 is exchanged with voltage V2, i.e., controller 160 judges touch-control
In the case of device 100 is not touched, third electric signal S3 is maintained at voltage V2, and controller 160 judge touch device 100 by
To after touching, third electric signal S3 is improved to voltage V1.
In conclusion in conclusion this exposure proposes a kind of touch device, by the piezoelectricity effect between two piezoelectric layers
Should whether depressed to detect touch device.The resetting-mechanisms such as spring, shrapnel are omitted in present embodiment, solve long-term
The problem of may will produce elastic fatigue using lower touch device.Further, since and the circuit film of contact is not used to start
Circuit also solves the problems, such as to may result in foreign body intrusion touch device and accidentally touches or react insensitive, significantly increases
The service life of touch device.In addition, by opening is reserved between two piezoelectric layers so that the center of pressing area can be with
Formation is evident that viewing area, and is also further applicable in dark place as pressing feedback by luminous mode.
This exposure is described by example and the above embodiment, it should be understood that the present invention is not limited to disclosed embodiment party
Formula.Opposite, the present invention covers the arrangement of a variety of changes and approximation, and (e.g., the usual those skilled in the art in this field can obviously learn
Person).Therefore, additional claim should cover all such changes and approximate arrangement according to most wide explanation.
Claims (10)
1. a kind of touch device, which is characterized in that include：
One shell has a plate body；
One first piezoelectric layer is set to below the plate body, which has one first opening；
One second piezoelectric layer is set to below first piezoelectric layer, and with one second opening, second open communication this first
Opening；
One display board is set in first opening, and exposed from the plate body；
One light-emitting component is set in the shell, and below the display board；And
One controller is electrically connected first piezoelectric layer, second piezoelectric layer and the light-emitting component.
2. the configuration of touch device as described in claim 1, the wherein controller is to export one first electric signal to first pressure
Electric layer makes first piezoelectric layer send out one first seismic wave, which is transferred to the plate body.
3. touch device as claimed in claim 2, wherein first seismic wave are transferred to second piezoelectric layer by the plate body, this
Two piezoelectric layers are configured so that first seismic wave is converted to one second electric signal.
4. the configuration of touch device as claimed in claim 3, the wherein controller is opened with the variation according to second electric signal
Or close the light-emitting component.
5. touch device as described in claim 1, the wherein shell further include a boss, which is set to the boss
On.
6. touch device as described in claim 1, wherein first opening are less than second opening.
7. touch device as described in claim 1, wherein first piezoelectric layer and second piezoelectric layer are annular, and this
One piezoelectric layer completely covers second piezoelectric layer.
8. touch device as described in claim 1, the wherein display board includes a transparent area and an opaque area, this is impermeable
Light area surrounds the transparent area.
9. touch device as described in claim 1, the wherein light-emitting component are aligned first opening or second opening.
10. touch device as described in claim 1, wherein first piezoelectric layer are electrically connected to a first electrode, this second
Piezoelectric layer is electrically connected to a second electrode, and first piezoelectric layer and second piezoelectric layer are electrically connected to electricity consumption altogether together
Pole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549291.8A CN108768207A (en) | 2018-05-31 | 2018-05-31 | Touch device |
| TW107120580A TWI664559B (en) | 2018-05-31 | 2018-06-14 | Touch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549291.8A CN108768207A (en) | 2018-05-31 | 2018-05-31 | Touch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108768207A true CN108768207A (en) | 2018-11-06 |
Family
ID=64001288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810549291.8A Pending CN108768207A (en) | 2018-05-31 | 2018-05-31 | Touch device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108768207A (en) |
| TW (1) | TWI664559B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1332505A2 (en) * | 2000-11-06 | 2003-08-06 | Dyna Systems GmbH | Electric switch, especially a piezo switch, with optical and/or mechanical feedback of the switching operation |
| CN1677319A (en) * | 2004-04-01 | 2005-10-05 | 华硕电脑股份有限公司 | Electronic device with touch-control type push-button |
| CN101860355A (en) * | 2009-04-08 | 2010-10-13 | 博西华电器（江苏）有限公司 | Touch key device and household appliance using same |
| CN106896955A (en) * | 2017-01-13 | 2017-06-27 | 麦克思商务咨询(深圳)有限公司 | Supersonic sensing device and its detection circuit and detection method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW241352B (en) * | 1994-03-30 | 1995-02-21 | Whitaker Corp | Reflective mode ultrasonic touch sensitive switch |
| US5770914A (en) * | 1995-03-10 | 1998-06-23 | International Game Technology | Illuminated piezoelectric switch |
| US9070499B2 (en) * | 2013-05-14 | 2015-06-30 | Universal Cement Corporation | Light emitting key |
| TWM535429U (en) * | 2016-06-23 | 2017-01-11 | 詠業科技股份有限公司 | Piezoelectric devices for generating and receiving ultrasonic signal |
-
2018
- 2018-05-31 CN CN201810549291.8A patent/CN108768207A/en active Pending
- 2018-06-14 TW TW107120580A patent/TWI664559B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1332505A2 (en) * | 2000-11-06 | 2003-08-06 | Dyna Systems GmbH | Electric switch, especially a piezo switch, with optical and/or mechanical feedback of the switching operation |
| CN1677319A (en) * | 2004-04-01 | 2005-10-05 | 华硕电脑股份有限公司 | Electronic device with touch-control type push-button |
| CN101860355A (en) * | 2009-04-08 | 2010-10-13 | 博西华电器（江苏）有限公司 | Touch key device and household appliance using same |
| CN106896955A (en) * | 2017-01-13 | 2017-06-27 | 麦克思商务咨询(深圳)有限公司 | Supersonic sensing device and its detection circuit and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI664559B (en) | 2019-07-01 |
| TW202004431A (en) | 2020-01-16 |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |
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