CN111103998A - Touch control detection device - Google Patents
Touch control detection device Download PDFInfo
- Publication number
- CN111103998A CN111103998A CN201811258132.9A CN201811258132A CN111103998A CN 111103998 A CN111103998 A CN 111103998A CN 201811258132 A CN201811258132 A CN 201811258132A CN 111103998 A CN111103998 A CN 111103998A
- Authority
- CN
- China
- Prior art keywords
- detection device
- touch panel
- controller
- touch detection
- touch
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 70
- 230000003750 conditioning effect Effects 0.000 claims abstract description 36
- 230000001939 inductive effect Effects 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 15
- 239000011358 absorbing material Substances 0.000 claims description 11
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 101100537098 Mus musculus Alyref gene Proteins 0.000 claims description 2
- 101100269674 Mus musculus Alyref2 gene Proteins 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 101150095908 apex1 gene Proteins 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 4
- 239000011540 sensing material Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
- G06F3/04142—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
- G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electronic Switches (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch detection device, comprising: a touch panel; a plurality of piezoelectric sensing sensors attached to the touch panel for detecting a tap event applied to the touch panel; and a control circuit board in communication with the plurality of piezoelectric inductive sensors. The control circuit board includes: the signal conditioning circuits are respectively connected to the piezoelectric induction sensors and are respectively used for processing detection signals output by the piezoelectric induction sensors; and the controller is suitable for judging whether the knocking event is in a designated area on the touch panel according to the processed detection signal. According to the invention, the touch detection device can conveniently and accurately identify whether the knocking event applied to the touch panel is in the designated area of the touch panel, and has the advantages of simple structure and low cost.
Description
Technical Field
The present disclosure relates to touch sensing devices, and particularly to a touch sensing device including a piezoelectric sensor.
Background
In order to improve the convenience of equipment and household appliance control, a visual and convenient human-computer interaction mode is realized by touching or knocking one surface through fingers, a conventionally used capacitive touch screen is mature, but when the touch range is large, for example, when the door of the whole washing machine or refrigerator is used as an input surface, the cost is high, and meanwhile, because the capacitive touch screen changes the capacitance value through contact, the touch strength and the touch material cannot be distinguished, and as long as the capacitive touch screen can be triggered by the contact of a conductive material, a lot of false triggers can be caused. When the usage scenario is defined as that a user uses finger positions such as joints or fingertips to tap a specific surface of a device as an input instruction to realize some simple operations, for example, double-click a refrigerator door to open a lamp inside the refrigerator, tap a door of a dishwasher to open the dishwasher, or double-click to open a down lamp of the washing machine, and triple-click to open the door of the washing machine, a microphone is also used to detect a sound signal or an acceleration sensor is used to detect a vibration signal. In the scheme of detecting the sound signal by using the microphone, because a closed sound cavity is formed, the installation is very troublesome, and the cost is higher. In the scheme of using the acceleration sensor to detect vibration, since the acceleration sensor needs SMT to be attached to a circuit board, and the acceleration sensor needs to be attached to a vibration surface, when the surface to be knocked is transparent such as glass, the circuit board is difficult to hide, and great challenges are created in appearance design.
In addition, in some applications, the user may need to tap in a designated area to respond, and no response is available outside the designated area. At present, if the piezoelectric material sensor is directly used, the monitoring area and the response area of the sensor are the same object plane, so that the limit is difficult to distinguish.
Disclosure of Invention
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
According to an aspect of the present invention, there is provided a touch detection apparatus, including: a touch panel; a plurality of piezoelectric sensing sensors attached to the touch panel for detecting a tap event applied to the touch panel; and a control circuit board in communication with the plurality of piezoelectric inductive sensors. The control circuit board includes: the signal conditioning circuits are respectively connected to the piezoelectric induction sensors and are respectively used for processing detection signals output by the piezoelectric induction sensors; and the controller is suitable for judging whether the knocking event is in a designated area on the touch panel according to the processed detection signal.
According to an exemplary embodiment of the invention, each of the signal conditioning circuits comprises: a filter for filtering out a noise signal which does not satisfy a predetermined condition from the detection signal; an amplifier for amplifying the filtered detection signal to a desired range; and the comparator comprises an upper limit gate comparator with fixed upper threshold voltage and a lower limit gate comparator with fixed lower threshold voltage and is used for processing the amplified detection signal into two paths of direct current voltage digital signals.
According to another exemplary embodiment of the present invention, the controller determines whether the tap event is within a designated area on the touch panel according to the digital signal of the dc voltage outputted from the plurality of signal conditioning circuits.
According to another exemplary embodiment of the present invention, the first direct voltage digital signal output from the upper limit gate comparator corresponds to a negative half cycle of the detection signal output from the piezoelectric induction sensor; the second path of direct current voltage digital signal output from the lower limit gate comparator corresponds to the positive half cycle of the detection signal output by the piezoelectric induction sensor.
According to another exemplary embodiment of the invention, when the controller detects that all the signals output by the plurality of signal conditioning circuits firstly are the first direct-current voltage digital signals or all the signals output by the plurality of signal conditioning circuits are the second direct-current voltage digital signals, the controller determines that the knocking event occurs in the designated area on the touch panel.
According to another exemplary embodiment of the present invention, when the controller detects that the signals output by the plurality of signal conditioning circuits first are not all the first direct-current voltage digital signals or are not all the second direct-current voltage digital signals, the controller determines that the tap event occurs outside the designated area on the touch panel.
According to another exemplary embodiment of the present invention, the designated area is a circular area or a square area.
According to another exemplary embodiment of the present invention, the plurality of piezoelectric inductive sensors are symmetrically arranged on a boundary line of the designated area around a geometric center of the designated area.
According to another exemplary embodiment of the present invention, a boundary line of the designated area passes through a geometric center of each of the piezoelectric induction sensors in a plan view.
According to another exemplary embodiment of the present invention, when the controller detects that all the signals output by the plurality of signal conditioning circuits first are the first direct current voltage digital signals, the controller determines that the tap event occurs within the designated area on the touch panel.
According to another exemplary embodiment of the present invention, the plurality of piezoelectric induction sensors are symmetrically arranged on the edge portion of the touch panel around the geometric center of the designated area so as to be hidden and hidden by a mounting bezel located at the edge portion of the touch panel.
According to another exemplary embodiment of the present invention, the controller is adapted to calculate a first time difference between an end time and an occurrence time of one path of the dc voltage digital signal detected first and a second time difference between an occurrence time of another path of the dc voltage digital signal detected later and an occurrence time of one path of the dc voltage digital signal detected first; and the controller judges whether the knocking event is a correct human finger knocking event or not according to the calculated first time difference and the second time difference.
According to another exemplary embodiment of the present invention, the controller determines the tap event as a correct human finger tap event when a difference between the second time difference and the first time difference is within a first threshold.
According to another exemplary embodiment of the present invention, the controller determines that the tap event is not a correct human finger tap event when a difference between the second time difference and the first time difference exceeds the first threshold.
According to another exemplary embodiment of the present invention, the first threshold is within 300-1400 μ s.
According to another exemplary embodiment of the invention, in the case that the tap event is determined as a correct human finger tap event, if the controller detects that the number of times of the first direct-current voltage digital signal output by each signal conditioning circuit is a single time, the controller determines that the tap event is a single-tap event.
According to another exemplary embodiment of the present invention, in a case that the tap event is determined as a correct human finger tap event, if the controller detects that the number of times of the first dc voltage digital signals output by each signal conditioning circuit is two, and a time interval between two times of detection of the first dc voltage digital signals is within a second threshold, the controller determines that the tap event is a double-tap event.
According to another exemplary embodiment of the present invention, the second threshold is within 200 to 500 ms.
According to another exemplary embodiment of the present invention, the touch panel is adapted to be mounted on a support, and the touch detection apparatus further includes an acoustic wave absorbing material adapted to be disposed between the touch panel and the support for acoustically isolating the touch panel from the support such that an acoustic wave generated on the support is not transmitted to the touch panel.
According to another exemplary embodiment of the present invention, the support is a case member, the touch panel is fitted on an opening of the support, and the acoustic wave absorbing material is disposed at a peripheral edge of the touch panel.
According to another exemplary embodiment of the present invention, the touch panel is supported on the support surface, and the acoustic wave absorbing material is disposed on a bottom surface of the touch panel.
According to another exemplary embodiment of the present invention, the touch panel is a circular panel, a square panel or a curved plate.
According to another exemplary embodiment of the present invention, the material of the touch panel is glass, stainless steel, or wood.
According to another exemplary embodiment of the present invention, the piezoelectric inductive sensor is a piezoelectric thin film sensor or a piezoelectric ceramic sensor.
In the foregoing exemplary embodiments of the present invention, the touch detection device can conveniently and accurately identify whether a tap event applied to the touch panel is within a designated area on the touch panel, and has a simple structure and low cost.
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
Drawings
FIG. 1 is a schematic diagram illustrating an application of a touch detection apparatus according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating an application of a touch detection apparatus according to another embodiment of the invention;
FIG. 3 is a functional block diagram of a control circuit board of a touch detection device according to an embodiment of the invention;
FIG. 4 is a schematic diagram of the signal conditioning circuit of the control circuit board of FIG. 3;
fig. 5 shows an input signal from the piezoelectric inductive sensor to the signal conditioning circuit and an output signal after being processed by the signal conditioning circuit.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to one general concept of the present invention, there is provided a touch sensing apparatus, including: a touch panel; a plurality of piezoelectric sensing sensors attached to the touch panel for detecting a tap event applied to the touch panel; and a control circuit board in communication with the plurality of piezoelectric inductive sensors. The control circuit board includes: the signal conditioning circuits are respectively connected to the piezoelectric induction sensors and are respectively used for processing detection signals output by the piezoelectric induction sensors; and the controller is suitable for judging whether the knocking event is in a designated area on the touch panel according to the processed detection signal.
Fig. 1 is a schematic application diagram of a touch detection device according to an embodiment of the invention.
As shown in fig. 1, in the illustrated embodiment, the touch sensing device mainly includes a touch panel 10, a plurality of piezoelectric inductive sensors S1, S2, S3, S4, and a control circuit board 200.
As shown in fig. 1, in the illustrated embodiment, a plurality of piezoelectric inductive sensors S1, S2, S3, S4 are attached to the touch panel 10 for detecting a tap event applied to the touch panel 10. The control circuit board 200 communicates with the plurality of piezoelectric inductive sensors S1, S2, S3, S4, for example, electrically connected to the plurality of piezoelectric inductive sensors S1, S2, S3, S4 by wires.
In the illustrated embodiment, the piezoelectric inductive sensors S1, S2, S3, S4 are piezoelectric thin film sensors. However, the present invention is not limited thereto, and the piezoelectric inductive sensor may be a piezoelectric inductive sensor made of any suitable piezoelectric inductive material, for example, the piezoelectric inductive sensor may also be a piezoelectric ceramic sensor made of piezoelectric ceramic.
FIG. 3 is a functional block diagram of a control circuit board of a touch detection device according to an embodiment of the invention; fig. 4 is a schematic diagram of a signal conditioning circuit of the control circuit board in fig. 3.
As shown in fig. 3 and 4, in the illustrated embodiment, the control circuit board 200 mainly includes a plurality of signal conditioning circuits 210 and a controller 220. The signal conditioning circuits 210 are respectively connected to the piezoelectric inductive sensors 100, and are respectively configured to process detection signals output by the piezoelectric inductive sensors 100. And a controller 220 adapted to determine whether the tap event is within a designated area a on the touch panel 10 according to the processed detection signal.
As shown in fig. 3 and 4, in the illustrated embodiment, each signal conditioning circuit 210 includes: a filter 211, an amplifier 212 and comparators 2131, 2132.
As shown in fig. 3 and 4, in the illustrated embodiment, a filter 211 is used to filter out noise signals that do not satisfy a predetermined condition from the detection signal. For example, high frequency vibration signals with frequencies above 2K hertz are filtered out, as finger tap frequencies are typically below 2K hertz.
As shown in fig. 3 and 4, in the illustrated embodiment, an amplifier 212 is used to amplify the filtered detection signal to a desired range; and comparators 2131 and 2132, which include an upper threshold comparator 2131 with a fixed upper threshold voltage Ref1 and a lower threshold comparator 2132 with a fixed lower threshold voltage Ref2, and are used for processing the amplified detection signal into two paths of direct-current voltage digital signals P1 and P2.
As shown in FIGS. 1, 3 and 4, in the illustrated embodiment, the controller 220 determines whether a tap event is within a designated area A on the touch panel 10 based on the DC voltage digital signals P1, P2 output by the plurality of signal conditioning circuits 210.
Fig. 5 shows an input signal from the piezoelectric inductive sensor to the signal conditioning circuit and an output signal after being processed by the signal conditioning circuit.
As shown in fig. 3 to 5, in the illustrated embodiment, the first dc voltage digital signal P1 output from the upper limit gate comparator 2131 corresponds to a negative half cycle of the detection signal output by the piezoelectric inductive sensor 100. The second dc voltage digital signal P2 output from the lower limit gate comparator 2132 corresponds to the positive half cycle of the detection signal output from the piezoelectric inductive sensor 100.
As shown in fig. 1, 3 to 5, in the illustrated embodiment, the designated area a is a circular area. However, the present invention is not limited to this, and the designated area a may be a square area.
As shown in fig. 1, 3 to 5, in the illustrated embodiment, a plurality of piezoelectric induction sensors S1, S2, S3, S4 are symmetrically arranged on a boundary line of the designated area a around the geometric center of the designated area a.
As shown in fig. 1, 3 to 5, in the illustrated embodiment, the boundary line of the designated area a passes through the geometric center of each of the piezoelectric induction sensors S1, S2, S3, S4 in a plan view.
As shown in fig. 1 and fig. 3 to fig. 5, in the illustrated embodiment, when the controller 220 detects that all the signals output by the signal conditioning circuits 210 first are the first dc voltage digital signal P1, the controller 220 determines that the tapping event occurs within the designated area a on the touch panel 10.
As shown in fig. 1 and fig. 3 to 5, in the illustrated embodiment, when the controller 220 detects that all of the signals output by the signal conditioning circuits 210 first are not the first direct-current voltage digital signal P1, the controller 220 determines that the tapping event occurs outside the designated area a on the touch panel 10.
Fig. 2 is a schematic application diagram of a touch detection device according to another embodiment of the invention.
In the embodiment shown in fig. 2, the plurality of piezoelectric inductive sensors S1, S2, S3, S4 are symmetrically arranged on the edge portion of the touch panel 10 around the geometric center of the designated area a so as to be hidden and hidden by the mounting bezel located at the edge portion of the touch panel 10. Thus, the aesthetic property of the touch detection device can be improved.
As shown in fig. 2 and 3 to 5, in the illustrated embodiment, when the controller 220 detects that all the signals output by the signal conditioning circuits 210 first are the first dc voltage digital signal P1 or all the second dc voltage digital signals P2, the controller 220 determines that the tapping event occurs within the designated area a on the touch panel 10.
As shown in fig. 2 and 3 to 5, in the illustrated embodiment, when the controller 220 detects that the signals output by the signal conditioning circuits 210 first are not all the first dc voltage digital signals P1 or not all the second dc voltage digital signals P2, the controller 220 determines that the tap event occurs outside the designated area a on the touch panel 10.
As shown in fig. 1 to 5, in the illustrated embodiment, the controller 220 is adapted to calculate a first time difference t1 between the ending time tc2 and the occurrence time tc1 of the first detected one-way dc voltage digital signal P1 and a second time difference t2 between the occurrence time tc3 of the second detected one-way dc voltage digital signal P2 and the occurrence time tc1 of the first detected one-way dc voltage digital signal P1. The controller 220 determines whether the tap event is a correct human finger tap event according to the calculated first time difference t1 and second time difference t 2.
1-5, in the illustrated embodiment, the controller 220 determines the tap event to be a proper human finger tap event when the difference between the second time difference t2 and the first time difference t1 is within a first threshold.
1-5, in the illustrated embodiment, the controller 220 determines that the tap event is not a proper human finger tap event when the difference between the second time difference t2 and the first time difference t1 exceeds a first threshold.
As shown in FIGS. 1-5, in the illustrated embodiment, the first threshold is within 300-1400 μ s.
As shown in fig. 1-5, in the illustrated embodiment, in the case that the tap event is determined as a correct human finger tap event, if the controller 220 detects that the number of times of the first dc voltage digital signal P1 output by each signal conditioning circuit 210 is single, the controller 220 determines that the tap event is a single-tap event.
As shown in fig. 1-5, in the illustrated embodiment, in the case that the tap event is determined to be the correct human finger tap event, if the controller 220 detects that the first dc voltage digital signal P1 output by each signal conditioning circuit 210 twice and the time interval between the two detections of the first dc voltage digital signal P1 is within the second threshold, the controller 220 determines that the tap event is the double tap event.
As shown in FIGS. 1-5, in the illustrated embodiment, the second threshold is within 200-500 ms.
As shown in fig. 1 and 2, in the illustrated embodiment, the touch panel 10 is adapted to be mounted on a support 20. The touch detection device further includes an acoustic wave absorbing material 30, and the acoustic wave absorbing material 30 is adapted to be disposed between the touch panel 10 and the support 20 for acoustically isolating the touch panel 10 from the support 20 such that the acoustic wave generated on the support 20 cannot be transmitted to the touch panel 10.
As shown in fig. 1 and 2, in the illustrated embodiment, the support body 20 is a housing member, the touch panel 10 is fitted on an opening of the support body 20, and the acoustic wave absorbing material 30 is provided at the peripheral edge of the touch panel 10.
However, the present invention is not limited to the illustrated embodiment, for example, in another embodiment of the present invention, the touch panel 10 may be supported on the surface of the support 20, and the acoustic wave absorbing material 30 may be disposed on the bottom surface of the touch panel 10.
As shown in fig. 1 and 2, in the illustrated embodiment, the touch panel 10 is a circular panel, but the present invention is not limited thereto, and the touch panel 10 may be a square panel or a curved panel.
As shown in fig. 1 and 2, in the illustrated embodiment, the material of the touch panel 10 may be glass, stainless steel, or wood.
The application provides a sensor scheme for detecting a knocking signal of a designated area based on a plurality of piezoelectric sensing materials such as piezoelectric films and piezoelectric ceramics, wherein a plurality of piezoelectric materials are attached to a hard panel, the shape of the panel can be a plane or an arbitrary three-dimensional curved surface, and sound wave absorbing materials such as sound absorbing foam or rubber are arranged around the hard panel and are isolated from the periphery. A plurality of piezoelectric sensing materials are symmetrically arranged at the boundary of the designated area. When a finger knocks in a designated area, sound waves (mechanical waves) generated by knocking propagate along the interior of the hard material to reach the position of each piezoelectric material, and the generated vibration causes the piezoelectric material to generate a piezoelectric effect and generates electric charges on the upper surface and the lower surface of the piezoelectric material. Since the vibration occurs in a common area of the plurality of piezoelectric sensing materials, the direction of the charge generated by each piezoelectric material should be the same and the phase deviation should be small. The latter circuit amplifies and filters each signal through corresponding circuit, and gives correct signal result through specific algorithm processing. If the knocking occurs outside the designated area, the direction or phase difference of signals generated by 1 or more sensors and other sensors is larger, and the subsequent circuit and software algorithm can judge that the knocking occurs outside the area according to the detection result. In addition, when the part outside the panel is knocked by fingers, the mechanical vibration of the panel is isolated and cannot be conducted to the position of the piezoelectric material due to the sound absorption material, so that false triggering is avoided.
The panel is simple and convenient to mount, can be directly attached to a hard surface such as glass, a mirror surface, stainless steel and wood, has extremely high cost, is not limited to the shape and the size of the panel, can be attached to any part of the panel, and has less limitation and challenge on the appearance design of equipment and household appliances.
The scheme of this application is through the array that a plurality of piezoelectric material sensors are constituteed, has carried out the plastic to the knocking signal that each piezoelectric sensor transmitted through hardware and has carried out the conditioning and become the digital signal that has a relation with knocking dynamics and frequency, thereby filters the signal through software algorithm and judges whether people strike, whether double-click operation, whether strike and take place operations such as appointed region. The detection of personnel's strike can be accomplished very intelligently, different user experience that can be used for household electrical appliances.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention.
Claims (24)
1. A touch detection device, comprising:
a touch panel (10);
a plurality of piezoelectric induction sensors (S1, S2, S3, S4) attached to the touch panel (10) for detecting a tap event applied to the touch panel (10); and
a control circuit board (200) in communication with the plurality of piezoelectric inductive sensors (S1, S2, S3, S4),
the method is characterized in that:
the control circuit board (200) includes:
a plurality of signal conditioning circuits (210) respectively connected to the plurality of piezoelectric inductive sensors (100) and respectively used for processing detection signals output by the plurality of piezoelectric inductive sensors (100); and
a controller (220) adapted to determine whether the tap event is within a specified area (A) on the touch panel (10) based on the processed detection signal.
2. The touch detection device of claim 1, wherein:
each of the signal conditioning circuits (210) comprises:
a filter (211) for filtering out noise signals that do not satisfy a predetermined condition from the detection signal;
an amplifier (212) for amplifying the filtered detection signal to a desired range; and
the comparators (2131, 2132) comprise an upper limit gate comparator (2131) with a fixed upper threshold voltage (Ref1) and a lower limit gate comparator (2132) with a fixed lower threshold voltage (Ref2), and are used for processing the amplified detection signal into two paths of direct current voltage digital signals (P1, P2).
3. The touch detection device of claim 2, wherein:
the controller (220) determines whether the tap event is within a designated area (A) on the touch panel (10) based on the DC voltage digital signals (P1, P2) output by the plurality of signal conditioning circuits (210).
4. The touch detection device of claim 3, wherein:
the first direct current voltage digital signal (P1) output from the upper limit gate comparator (2131) corresponds to the negative half period of the detection signal output by the piezoelectric induction sensor (100);
the second path of direct current voltage digital signal (P2) output from the lower limit gate comparator (2132) corresponds to the positive half cycle of the detection signal output by the piezoelectric induction sensor (100).
5. The touch detection device of claim 4, wherein:
when the controller (220) detects that the signals output by the signal conditioning circuits (210) firstly are all the first direct current voltage digital signals (P1) or all the second direct current voltage digital signals (P2), the controller (220) judges that the knocking event occurs in a designated area (A) on the touch panel (10).
6. The touch detection device of claim 5, wherein:
when the controller (220) detects that the signals output by the plurality of signal conditioning circuits (210) firstly are not all the first direct current voltage digital signals (P1) or not all the second direct current voltage digital signals (P2), the controller (220) judges that the knocking event occurs out of the designated area (A) on the touch panel (10).
7. The touch detection device of claim 5, wherein: the designated area (A) is a circular area or a square area.
8. The touch detection device of claim 7, wherein:
the plurality of piezoelectric induction sensors (S1, S2, S3, S4) are symmetrically arranged on a boundary line of the designated area (A) around a geometric center of the designated area (A).
9. The touch detection device of claim 8, wherein:
in a plan view, a boundary line of the designated area (a) passes through a geometric center of each of the piezoelectric induction sensors (S1, S2, S3, S4).
10. The touch detection device of claim 9, wherein:
when the controller (220) detects that all the signals output by the signal conditioning circuits (210) firstly are first direct current voltage digital signals (P1), the controller (220) judges that the knocking event occurs in a designated area (A) on the touch panel (10).
11. The touch detection device of claim 7, wherein:
the plurality of piezoelectric induction sensors (S1, S2, S3, S4) are symmetrically arranged on an edge portion of the touch panel (10) around a geometric center of the designated area (A) so as to be hidden and hidden by a mounting bezel located at the edge portion of the touch panel (10).
12. The touch detection device according to claim 5, characterized in that:
the controller (220) is suitable for calculating a first time difference (t1) between the end time (tc2) and the occurrence time (tc1) of one path of the detected direct-current voltage digital signal (P1) and a second time difference (t2) between the occurrence time (tc3) of the other path of the detected direct-current voltage digital signal (P2) and the occurrence time (tc1) of one path of the detected direct-current voltage digital signal (P1);
the controller (220) determines whether the tap event is a correct human finger tap event based on the calculated first time difference (t1) and second time difference (t 2).
13. The touch detection device of claim 12, wherein:
the controller (220) determines the tap event to be a correct human finger tap event when the difference between the second time difference (t2) and the first time difference (t1) is within a first threshold.
14. The touch detection device of claim 13, wherein:
when the difference between the second time difference (t2) and the first time difference (t1) exceeds the first threshold, the controller (220) determines that the tap event is not a correct human finger tap event.
15. The touch detection device of claim 14, wherein: the first threshold value is within 300-1400 mu s.
16. The touch detection device of claim 13, wherein:
under the condition that the tapping event is determined as a correct human finger tapping event, if the controller (220) detects that the number of times of the first direct-current voltage digital signal (P1) output by each signal conditioning circuit (210) is single, the controller (220) determines that the tapping event is a single-clicking event.
17. The touch detection device of claim 13, wherein:
in the case that the tap event is determined as a correct human finger tap event, if the controller (220) detects that the number of times of the first direct current voltage digital signal (P1) output by each signal conditioning circuit (210) is two, and the time interval between the two times of detection of the first direct current voltage digital signal (P1) is within a second threshold value, the controller (220) determines that the tap event is a double-tap event.
18. The touch detection device of claim 17, wherein: the second threshold value is within 200-500 ms.
19. The touch detection device of claim 1, wherein:
the touch panel (10) is suitable for being mounted on a support body (20), the touch detection device further comprises an acoustic wave absorbing material (30), and the acoustic wave absorbing material (30) is suitable for being arranged between the touch panel (10) and the support body (20) and used for acoustically isolating the touch panel (10) from the support body (20) so that the acoustic wave generated on the support body (20) cannot be transmitted to the touch panel (10).
20. The touch detection device of claim 19, wherein:
the support body (20) is a shell component, the touch panel (10) is embedded on an opening of the support body (20), and the sound wave absorption material (30) is arranged at the periphery of the touch panel (10).
21. The touch detection device of claim 19, wherein:
the touch panel (10) is supported on the surface of the support (20), and the acoustic wave absorbing material (30) is provided on the bottom surface of the touch panel (10).
22. The touch detection device of claim 1, wherein: the touch panel (10) is a circular panel, a square panel or a curved plate.
23. The touch detection device of claim 1, wherein: the touch panel (10) is made of glass, stainless steel or wood.
24. The touch detection device of claim 1, wherein: the piezoelectric induction sensor is a piezoelectric film sensor or a piezoelectric ceramic sensor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258132.9A CN111103998B (en) | 2018-10-26 | 2018-10-26 | Touch control detection device |
| PCT/EP2019/079222 WO2020084130A1 (en) | 2018-10-26 | 2019-10-25 | Touch detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258132.9A CN111103998B (en) | 2018-10-26 | 2018-10-26 | Touch control detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111103998A true CN111103998A (en) | 2020-05-05 |
| CN111103998B CN111103998B (en) | 2024-06-14 |
Family
ID=68382450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811258132.9A Active CN111103998B (en) | 2018-10-26 | 2018-10-26 | Touch control detection device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111103998B (en) |
| WO (1) | WO2020084130A1 (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060232558A1 (en) * | 2005-04-15 | 2006-10-19 | Huan-Wen Chien | Virtual keyboard |
| US20070070046A1 (en) * | 2005-09-21 | 2007-03-29 | Leonid Sheynblat | Sensor-based touchscreen assembly, handheld portable electronic device having assembly, and method of determining touch location on a display panel |
| US20090294186A1 (en) * | 2005-08-09 | 2009-12-03 | Luca Fontanella | Touch position determining device and method, and electronic touch-sensitive device |
| US20100177057A1 (en) * | 2009-01-13 | 2010-07-15 | Qsi Corporation | System and method for detecting shocks to a force-based touch panel |
| CN101840293A (en) * | 2010-01-21 | 2010-09-22 | 宸鸿科技(厦门)有限公司 | Scanning method for projected capacitive touch panels |
| CN102047205A (en) * | 2008-06-02 | 2011-05-04 | 艾勒博科技股份有限公司 | A touch panel apparatus and a method for detecting a contact position on the same |
| CN102439549A (en) * | 2009-04-06 | 2012-05-02 | 3M创新有限公司 | Touch sensor with modular sensing components |
| US20120113028A1 (en) * | 2010-06-28 | 2012-05-10 | Cleankeys Inc. | Method for detecting and locating keypress-events on touch- and vibration-sensitive flat surfaces |
| US20150035759A1 (en) * | 2013-08-02 | 2015-02-05 | Qeexo, Co. | Capture of Vibro-Acoustic Data Used to Determine Touch Types |
| US20150346903A1 (en) * | 2014-05-30 | 2015-12-03 | Apple Inc. | Low power scan for device wake up and unlock |
| US20160299621A1 (en) * | 2015-04-08 | 2016-10-13 | Hyundai Motor Company | Apparatus and Method for Recognizing a User Input |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003266663A1 (en) * | 2002-10-01 | 2004-04-23 | National Institute Of Advanced Industrial Science And Technology | Piezoelectric sensor and input device comprising same |
| CN102339175A (en) * | 2010-07-15 | 2012-02-01 | 汉王科技股份有限公司 | Touch sensitive locating device and method |
| US9880671B2 (en) * | 2013-10-08 | 2018-01-30 | Sentons Inc. | Damping vibrational wave reflections |
| US20170052631A1 (en) * | 2015-08-20 | 2017-02-23 | Futurewei Technologies, Inc. | System and Method for Double Knuckle Touch Screen Control |
| CN110319955B (en) * | 2018-03-29 | 2021-06-18 | 泰科电子(上海)有限公司 | Piezoelectric thin film detection device and piezoelectric thin film sensor |
-
2018
- 2018-10-26 CN CN201811258132.9A patent/CN111103998B/en active Active
-
2019
- 2019-10-25 WO PCT/EP2019/079222 patent/WO2020084130A1/en active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060232558A1 (en) * | 2005-04-15 | 2006-10-19 | Huan-Wen Chien | Virtual keyboard |
| US20090294186A1 (en) * | 2005-08-09 | 2009-12-03 | Luca Fontanella | Touch position determining device and method, and electronic touch-sensitive device |
| US20070070046A1 (en) * | 2005-09-21 | 2007-03-29 | Leonid Sheynblat | Sensor-based touchscreen assembly, handheld portable electronic device having assembly, and method of determining touch location on a display panel |
| CN102047205A (en) * | 2008-06-02 | 2011-05-04 | 艾勒博科技股份有限公司 | A touch panel apparatus and a method for detecting a contact position on the same |
| US20100177057A1 (en) * | 2009-01-13 | 2010-07-15 | Qsi Corporation | System and method for detecting shocks to a force-based touch panel |
| CN102439549A (en) * | 2009-04-06 | 2012-05-02 | 3M创新有限公司 | Touch sensor with modular sensing components |
| CN101840293A (en) * | 2010-01-21 | 2010-09-22 | 宸鸿科技(厦门)有限公司 | Scanning method for projected capacitive touch panels |
| US20120113028A1 (en) * | 2010-06-28 | 2012-05-10 | Cleankeys Inc. | Method for detecting and locating keypress-events on touch- and vibration-sensitive flat surfaces |
| US20150035759A1 (en) * | 2013-08-02 | 2015-02-05 | Qeexo, Co. | Capture of Vibro-Acoustic Data Used to Determine Touch Types |
| US20150346903A1 (en) * | 2014-05-30 | 2015-12-03 | Apple Inc. | Low power scan for device wake up and unlock |
| US20160299621A1 (en) * | 2015-04-08 | 2016-10-13 | Hyundai Motor Company | Apparatus and Method for Recognizing a User Input |
Non-Patent Citations (2)
| Title |
|---|
| JUN-HYEOK YANG等: "A Noise-Immune High-Speed Readout Circuit for In-Cell Touch Screen Panels", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I: REGULAR PAPERS》, 18 March 2013 (2013-03-18) * |
| 吴红梅;周青雅;: "电容式触摸传感器触摸屏实现", 计算机光盘软件与应用, no. 22, 15 November 2014 (2014-11-15) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111103998B (en) | 2024-06-14 |
| WO2020084130A1 (en) | 2020-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9159217B1 (en) | Methods and apparatus notifying a remotely located user of the operating condition of a household appliance | |
| US9386140B2 (en) | Methods and apparatus notifying a user of the operating condition of a remotely located household appliance | |
| US9888452B2 (en) | Methods and apparatus notifying a user of the operating condition of a household appliance | |
| US10386968B2 (en) | Method and apparatus for active ultrasonic touch devices | |
| US20180158288A1 (en) | Methods and apparatus for notifying a user of the operating condition of a household appliance | |
| EP2945398B1 (en) | Motion sensor | |
| US9851848B2 (en) | Touch sensitive device casing | |
| CN102938820A (en) | Mobile phone proximity waking method and mobile phone proximity waking device | |
| WO2007115587A1 (en) | Household appliance | |
| US11532194B2 (en) | Knock detection device and household appliance including the same | |
| US11789546B2 (en) | Touch key assembly, control circuit, and electronic device | |
| EP3065043A1 (en) | Mobile device | |
| CN107430445B (en) | System and method for controlling terminal device | |
| CN111103998B (en) | Touch control detection device | |
| CN111103999B (en) | Touch control detection device | |
| CN112214123A (en) | Device for eliminating noise misjudgment and household appliance | |
| FI130469B (en) | User input and feedback device with combined feedback and user input detection | |
| US20210034177A1 (en) | Touch sensing device capable of performing touch sensing and force sensing using single sensing structure and electronic device including the same | |
| CN105407230B (en) | Control method, control device and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |