CN109343750B - Touch control identification device and manufacturing method thereof - Google Patents
Touch control identification device and manufacturing method thereof Download PDFInfo
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- CN109343750B CN109343750B CN201811167610.5A CN201811167610A CN109343750B CN 109343750 B CN109343750 B CN 109343750B CN 201811167610 A CN201811167610 A CN 201811167610A CN 109343750 B CN109343750 B CN 109343750B
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- 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
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Abstract
A touch recognition device, comprising: the shock-absorbing rubber material comprises a metal plate, a plurality of transmitting piezoelectric sheets, a plurality of receiving piezoelectric sheets, a shock-absorbing rubber material and a plurality of long shock-absorbing rubber materials. The transmitting piezoelectric sheet is arranged on the metal plate and used for transmitting lamb waves. The receiving piezoelectric sheets are arranged on the metal plate opposite to the transmitting piezoelectric sheets in a one-to-one mode and used for receiving lamb waves. The shock-absorbing rubber material is arranged around the metal plate. The two of the long shock-absorbing rubber materials are disposed on two sides of each emitting piezoelectric plate, and the long shock-absorbing rubber materials and the emitting piezoelectric plates are alternately disposed on the metal plate.
Description
Technical Field
The present disclosure relates to a touch recognition device, and more particularly, to a touch recognition device and a method for manufacturing the same.
Background
The identification technologies commonly used in the touch identification device at present are roughly classified into capacitive touch, resistive touch, ultrasonic touch, and optical touch. The most important features of ultrasonic touch are low cost and simple hardware, and the characteristics of ultrasonic waves transmitted in or on the panel and affected by finger touch are utilized to calculate the exact position of finger touch by cooperating with an algorithm.
Ultrasonic touch can be divided into passive discrimination and active discrimination. The passive discrimination technique uses a finger as a transmitted wave source, and uses a piezoelectric receiver to receive a signal and analyze the signal by using an algorithm according to a sound wave signal generated after the finger touches the sensor. The active discrimination technique uses a piezoelectric actuator to actively excite an ultrasonic wave source, and a finger is used as a role to absorb the acoustic energy of an object, and a piezoelectric receiver is used to receive signals and an algorithm is used to analyze the signals. Lamb waves (lamb waves) are one of the guided waves in the plate for active discrimination, and can be excited and received by mounting a piezoelectric material sheet on the edge of a thin plate and applying an input voltage.
Disclosure of Invention
The present disclosure provides a touch identification device, including: the shock-absorbing rubber material comprises a metal plate, a plurality of transmitting piezoelectric sheets, a plurality of receiving piezoelectric sheets, a shock-absorbing rubber material and a plurality of long shock-absorbing rubber materials. The transmitting piezoelectric sheet is arranged on the metal plate and used for transmitting lamb waves. The receiving piezoelectric sheets are arranged on the metal plate opposite to the transmitting piezoelectric sheets in a one-to-one mode and used for receiving lamb waves. The shock-absorbing rubber material is arranged around the metal plate. The two of the long shock-absorbing rubber materials are disposed on two sides of each emitting piezoelectric plate, and the long shock-absorbing rubber materials and the emitting piezoelectric plates are alternately disposed on the metal plate.
In some embodiments, the metal plate is a steel plate, and the transmitting piezoelectric patch and the receiving piezoelectric patch are disposed on an edge of the metal plate in a one-to-one manner.
In some embodiments, two adjacent ones of the radiating piezoelectric plates are arranged along a first direction, and the strip of shock-absorbing rubber material between the two adjacent ones of the radiating piezoelectric plates extends along a second direction perpendicular to the first direction.
In some embodiments, the length of the elongated shock absorbing gel adjacent one of the emitter piezoelectric patches is designed to limit the emission angle of the one of the emitter piezoelectric patches from which lamb waves are emitted.
In some embodiments, the emitting piezoelectric patches and the receiving piezoelectric patches are all in the shape of a circle with a radius R, the long shock-absorbing adhesive strips and the emitting piezoelectric patches are arranged in a D/2 equidistant staggered manner, and the distance between one of the emitting piezoelectric patches and one of the receiving piezoelectric patches opposite to the one of the emitting piezoelectric patches is D, so that the length L of each long shock-absorbing adhesive strip is limited as follows:
in another aspect of the present disclosure, a method for manufacturing a touch recognition device includes: providing a metal plate; arranging a plurality of transmitting piezoelectric patches on the metal plate, wherein the transmitting piezoelectric patches are used for transmitting lamb waves; a plurality of receiving piezoelectric sheets are arranged on the metal plate in a one-to-one manner relative to the transmitting piezoelectric sheets, and the receiving piezoelectric sheets are used for receiving lamb waves; arranging a shock-absorbing rubber material around the metal plate; and arranging a plurality of long-strip shock-absorbing rubber materials on the metal plate, wherein two of the long-strip shock-absorbing rubber materials are arranged on two sides of each transmitting piezoelectric sheet, and the long-strip shock-absorbing rubber materials and the transmitting piezoelectric sheets are arranged on the metal plate in a staggered manner.
In some embodiments, the metal plate is a steel plate, and the transmitting piezoelectric patch and the receiving piezoelectric patch are disposed on an edge of the metal plate in a one-to-one manner.
In some embodiments, two adjacent ones of the radiating piezoelectric plates are arranged along a first direction, and the strip of shock-absorbing rubber material between the two adjacent ones of the radiating piezoelectric plates extends along a second direction perpendicular to the first direction.
In some embodiments, the length of the elongated shock absorbing gel adjacent one of the emitter piezoelectric patches is designed to limit the emission angle of the one of the emitter piezoelectric patches from which lamb waves are emitted.
In some embodiments, the emitting piezoelectric patches and the receiving piezoelectric patches are all in the shape of a circle with a radius R, the long shock-absorbing adhesive strips and the emitting piezoelectric patches are arranged in a D/2 equidistant staggered manner, and the distance between one of the emitting piezoelectric patches and one of the receiving piezoelectric patches opposite to the one of the emitting piezoelectric patches is D, so that the length L of each long shock-absorbing adhesive strip is limited as follows:
in order to make the aforementioned and other features and advantages of the disclosure more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Aspects of the present disclosure may be better understood from the following detailed description taken in conjunction with the accompanying drawings. It is noted that, in accordance with standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
Fig. 1 is a configuration diagram of a touch recognition device according to a first embodiment of the disclosure.
Fig. 2 is a schematic diagram illustrating touch recognition of a touch recognition device according to a first embodiment of the disclosure.
Fig. 3 is a configuration diagram of a touch recognition device according to a second embodiment of the disclosure.
Fig. 4 is a schematic diagram illustrating touch recognition of a touch recognition device according to a second embodiment of the disclosure.
Fig. 5 and 6 are explanatory diagrams illustrating a length limitation of the long shock-absorbing rubber of the touch recognition device according to the second embodiment of the disclosure.
Fig. 7 is a schematic diagram illustrating touch recognition of a touch recognition device according to a second embodiment of the disclosure.
FIG. 8 is a flowchart illustrating a method for manufacturing a touch recognition device according to a second embodiment of the disclosure.
Reference numerals:
100. 300, and (2) 300: the touch recognition device 120: metal plate
140: shock-absorbing rubber material 360, 360 a-360 h: long shock-absorbing rubber material
800: the manufacturing method is 810-850: step (ii) of
TX, TX1 TX 6: transmitting piezoelectric pieces RX, RX 1-RX 6: receiving piezoelectric sheet
P1-P3: touch point X, Y: direction of rotation
D、d、R、L、D-L、
Length of
Detailed Description
Embodiments of the invention are discussed in detail below. It should be appreciated, however, that the embodiments provide many applicable concepts that can be embodied in a wide variety of specific contexts. The embodiments discussed and disclosed are merely illustrative and are not intended to limit the scope of the invention.
Fig. 1 is a configuration diagram of a touch recognition device 100 according to a first embodiment of the disclosure. The touch recognition device 100 includes: the metal plate 120, a plurality of transmitting piezoelectric pieces TX 1-TX 6, a plurality of receiving piezoelectric pieces RX 1-RX 6 and the shock-absorbing rubber material 140. The transmitting piezoelectric sheets TX 1-TX 6 are disposed on the metal plate 120 for transmitting lamb waves (lamb waves). The receiving piezoelectric patches RX 1-RX 6 are disposed on the metal plate 120 in a one-to-one manner with respect to the transmitting piezoelectric patches TX 1-TX 6, and are used for receiving lamb waves transmitted by the transmitting piezoelectric patches TX 1-TX 6.
In the embodiment of the disclosure, the number of the transmitting piezoelectric patches TX 1-TX 6 and the number of the receiving piezoelectric patches RX 1-RX 6 are six, but the disclosure is not limited thereto, and the number of the transmitting piezoelectric patches and the receiving piezoelectric patches may be adjusted according to actual requirements. In the embodiment of the disclosure, the transmitting piezoelectric patches TX 1-TX 6 and the receiving piezoelectric patches RX 1-RX 6 are disposed on the edge of the metal plate 120 one-to-one, but the disclosure is not limited thereto, and the positions of the transmitting piezoelectric patches and the receiving piezoelectric patches may be adjusted according to actual requirements. The metal plate 120 may be, for example, a steel plate, but the disclosure is not limited thereto. The transmitting piezoelectric patches TX 1-TX 6 and the receiving piezoelectric patches RX 1-RX 6 may be circular piezoelectric patches, for example, but the disclosure is not limited thereto.
The touch recognition device 100 can locate the touch position of the finger by using the lamb waves emitted by the emitting piezoelectric sheets TX 1-TX 6, which pass through the transfer characteristic that the finger can absorb energy, so that the signals received by the receiving piezoelectric sheets RX 1-RX 6 are different, and then an algorithm is matched. The way how to locate the position of the finger touch should be known to those skilled in the art, and therefore, will not be explained in detail in this specification.
Since the lamb wave is transmitted to the edge of the metal plate 120 and generates a reflected wave to cause interference, the touch recognition device 100 further includes a shock-absorbing rubber 140 surrounding the metal plate 120, and the shock-absorbing rubber 140 is used for absorbing the reflected wave, thereby avoiding the interference of the reflected wave.
Fig. 2 is a schematic diagram illustrating touch recognition of the touch recognition device 100 according to the first embodiment of the disclosure. Three touch points P1, P2, and P3 to be touched by a finger are marked on the metal plate 120. In the first embodiment as shown in fig. 2, when the transmitting piezoelectric patch TX1 transmits lamb waves and a finger does not touch and touches one of the touch points P1, P2 and P3, the signals measured by the receiving piezoelectric patches RX3 and RX2 respectively have variations (i.e. variations of the signals when the finger does not touch and touches the signal). Before measurement, a zeroing operation is performed to ensure the measurement accuracy.
In the embodiment of the present disclosure, the difference amount is defined as [ (the variation amount of the opposed receiving piezoelectric sheet-the variation amount of the receiving piezoelectric sheet adjacent to the opposed receiving piezoelectric sheet)/the variation amount of the receiving piezoelectric sheet adjacent to the opposed receiving piezoelectric sheet ] × 100%. Therefore, in the embodiment shown in fig. 2, the difference value [ (the variation of the received piezoelectric sheet RX 3-the variation of the received piezoelectric sheet RX 2)/the variation of the received piezoelectric sheet RX2 ] × 100%. According to the above definitions, for the present disclosure, if the difference is not large enough, it may cause a false determination during touch recognition, so the present disclosure provides a second embodiment in the following paragraphs, thereby further increasing the difference to enable more accurate touch recognition.
Fig. 3 is a configuration diagram of a touch recognition device 300 according to a second embodiment of the disclosure. The touch recognition device 300 includes: the metal plate 120, a plurality of transmitting piezoelectric pieces TX 1-TX 6, a plurality of receiving piezoelectric pieces RX 1-RX 6, a shock-absorbing rubber material 140 and a plurality of strip shock-absorbing rubber materials 360 a-360 h. The touch recognition device 300 shown in fig. 3 has a structure similar to that of the touch recognition device 100 shown in fig. 1, and the touch recognition device 300 further includes strip-shaped shock-absorbing rubber materials 360a to 360h, the strip-shaped shock-absorbing rubber materials 360a to 360h are respectively disposed on two sides of the transmitting piezoelectric sheets TX1 to TX6, and the strip-shaped shock-absorbing rubber materials 360a to 360h and the transmitting piezoelectric sheets TX1 to TX6 are alternately disposed on the metal plate 120.
In a second embodiment of the present disclosure, two adjacent ones of the emitter piezoelectric plates are arranged along a first direction, and the strip of shock-absorbing rubber material between the two adjacent ones of the emitter piezoelectric plates extends along a second direction perpendicular to the first direction. As shown in fig. 3, the transmitting piezoelectric pieces TX1, TX2 and TX3 are arranged along the direction Y, and the long shock-absorbing rubber materials 360b and 360c between two adjacent transmitting piezoelectric pieces TX1, TX2 and TX3 extend along the direction X perpendicular to the direction Y.
In a second embodiment of the present disclosure, the length of the long shock-absorbing rubber adjacent to the transmitting piezoelectric plate is designed to limit the transmitting angle of the transmitting piezoelectric plate for transmitting lamb waves, and the length design of the long shock-absorbing rubber will be described in the following paragraphs.
Fig. 4 is a schematic diagram illustrating touch recognition of a touch recognition device 300 according to a second embodiment of the disclosure. The transmitting piezoelectric patch TX transmits lamb waves, which are received by the receiving piezoelectric patch RX through the metal plate 120. As shown in fig. 4, the long shock absorbing rubber 360 is attached to one side of the metal plate 120 in the same direction as the transmitting piezoelectric patch TX and the receiving piezoelectric patch RX.
Fig. 5 and 6 are explanatory diagrams showing the length limitation of the long shock-absorbing rubber material 360 of the touch recognition device 300 according to the second embodiment of the disclosure. As shown in fig. 5 and 6, the transmitting piezoelectric patch TX and the receiving piezoelectric patch RX are both circular piezoelectric patches with a radius of length R, a central distance between the two transmitting piezoelectric patches TX is D, a central distance between the two receiving piezoelectric patches RX is D, the long shock-absorbing rubber material 360 and the transmitting piezoelectric patches TX are arranged in an equidistant staggered manner, that is, the distance between the adjacent long shock-absorbing rubber material 360 and the center of the transmitting piezoelectric patch TX is D/2, the distance between the transmitting piezoelectric patch TX and the receiving piezoelectric patch RX located opposite to the transmitting piezoelectric patch TX is D, and the length of the long shock-absorbing rubber material 360 is L.
Referring to fig. 5, the length L of the shock absorbing rubber strip 360 is equal to D/2 according to the principle of triangle symmetry. That is, in the second embodiment of the present disclosure, the length L of the shock-absorbing rubber strip is limited to:
which is the upper limit value of the length L of the shock absorbing rubber strip 360.
Referring to fig. 6, as can be seen from the principle of triangular symmetry,
thus, the length L of the shock absorbing runner 360 in FIG. 6 is equal to
That is, in the second embodiment of the present disclosure, the length L of the shock-absorbing rubber strip is limited to:
which is the lower limit of the length L of the shock absorbing runner 360.
Fig. 7 is a schematic diagram illustrating touch recognition of a touch recognition device 300 according to a second embodiment of the disclosure. In the second embodiment as shown in fig. 7, when the transmitting piezoelectric patch TX1 transmits lamb waves and a finger does not touch and touches one of the touch points P1, P2 and P3, the signals measured by the receiving piezoelectric patches RX3 and RX2 respectively have variations (i.e. variations of the signals when not touching and touching). In the second embodiment of the present disclosure, the touch recognition device 300 reduces the mutual interference between signals by disposing the long shock absorbing rubber 360 a-360 h, so that the touch recognition device 300 can increase the difference compared to the touch recognition device 100, so as to perform touch recognition more accurately.
FIG. 8 is a flowchart illustrating a method 800 for fabricating a touch recognition device 300 according to a second embodiment of the present disclosure. The method 800 for manufacturing the touch recognition device 300 includes steps 810-850. Referring to fig. 3 and 8, in step 810, a metal plate 120 is provided. In step 820, a plurality of transmitting piezoelectric patches TX 1-TX 6 are disposed on the metal plate 120, and the transmitting piezoelectric patches TX 1-TX 6 are used for transmitting lamb waves. In step 830, a plurality of receiving piezoelectric patches RX 1-RX 6 are disposed on the metal plate 120 in a one-to-one manner with respect to the transmitting piezoelectric patches TX 1-TX 6, and the receiving piezoelectric patches RX 1-RX 6 are used for receiving lamb waves. In step 840, a shock absorbing material 140 is disposed around the metal plate 120. In step 850, a plurality of long-strip shock-absorbing rubber materials 360a to 360h are disposed on the metal plate 120, wherein the plurality of long-strip shock-absorbing rubber materials 360a to 360h are disposed on two sides of the transmitting piezoelectric patches TX1 to TX6, respectively, and the long-strip shock-absorbing rubber materials 360a to 360h and the transmitting piezoelectric patches TX1 to TX6 are disposed on the metal plate 120 in an interlaced manner.
The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. It should also be understood by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.
Claims (8)
1. A touch recognition device, comprising:
a metal plate;
a plurality of transmitting piezoelectric sheets arranged on the metal plate and used for transmitting lamb waves;
a plurality of receiving piezoelectric pieces which are arranged on the metal plate in a one-to-one manner relative to the transmitting piezoelectric pieces and are used for receiving lamb waves;
a shock-absorbing rubber material arranged around the metal plate; and
a plurality of long-strip shock-absorbing rubber materials, wherein two of the long-strip shock-absorbing rubber materials are arranged on two sides of each of the emitting piezoelectric sheets, and the long-strip shock-absorbing rubber materials and the emitting piezoelectric sheets are arranged on the metal plate in a staggered manner;
wherein, the shape of these launching piezoelectric pieces and these receiving piezoelectric pieces are all circles with radius R, these long strips inhale shake glue material and these launching piezoelectric pieces with D/2 equidistance alternately set up, wherein the distance that one of these launching piezoelectric pieces and one of these receiving piezoelectric pieces that lie in this one of these launching piezoelectric pieces opposite direction is D, then the restriction that the length L of each these long strips inhale shake glue material is:
2. the touch recognition device of claim 1, wherein the metal plate is a steel plate, and the transmitting piezoelectric patches and the receiving piezoelectric patches are disposed on an edge of the metal plate in a one-to-one manner.
3. The touch recognition device of claim 1, wherein adjacent ones of the emitter piezoelectric plates are arranged along a first direction, and the strip of shock absorbing material between the adjacent ones of the emitter piezoelectric plates extends along a second direction perpendicular to the first direction.
4. The touch recognition device of claim 3, wherein the lengths of the strips of shock absorbing adhesive adjacent to one of the transmitting piezoelectric patches are designed to limit an emitting angle of the one of the transmitting piezoelectric patches from which lamb waves are emitted.
5. A method for manufacturing a touch recognition device, comprising:
providing a metal plate;
disposing a plurality of transmitting piezoelectric sheets on the metal plate, wherein the transmitting piezoelectric sheets are used for transmitting lamb waves;
a plurality of receiving piezoelectric pieces are arranged on the metal plate in a one-to-one manner relative to the transmitting piezoelectric pieces, and the receiving piezoelectric pieces are used for receiving lamb waves;
arranging a shock absorbing rubber material around the metal plate; and
arranging a plurality of long-strip shock-absorbing rubber materials on the metal plate, wherein two of the long-strip shock-absorbing rubber materials are arranged on two sides of each of the emitting piezoelectric pieces, and the long-strip shock-absorbing rubber materials and the emitting piezoelectric pieces are arranged on the metal plate in a staggered manner;
wherein, the shape of these launching piezoelectric pieces and these receiving piezoelectric pieces are all circles with radius R, these long strips inhale shake glue material and these launching piezoelectric pieces with D/2 equidistance alternately set up, wherein the distance that one of these launching piezoelectric pieces and one of these receiving piezoelectric pieces that lie in this one of these launching piezoelectric pieces opposite direction is D, then the restriction that the length L of each these long strips inhale shake glue material is:
6. the method of claim 5, wherein the metal plate is a steel plate, and the transmitting piezoelectric patches and the receiving piezoelectric patches are disposed on an edge of the metal plate in a one-to-one manner.
7. The method as claimed in claim 5, wherein adjacent ones of the piezoelectric patches are arranged along a first direction, and the strip of shock absorbing adhesive between the adjacent ones of the piezoelectric patches extends along a second direction perpendicular to the first direction.
8. The method of claim 7, wherein the lengths of the strips of shock absorbing adhesive adjacent to one of the transmitting piezoelectric patches are designed to limit an emitting angle at which the one of the transmitting piezoelectric patches emits lamb waves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811167610.5A CN109343750B (en) | 2018-10-08 | 2018-10-08 | Touch control identification device and manufacturing method thereof |
| TW107136477A TWI690833B (en) | 2018-10-08 | 2018-10-17 | Touch recognition device and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811167610.5A CN109343750B (en) | 2018-10-08 | 2018-10-08 | Touch control identification device and manufacturing method thereof |
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| CN109343750A CN109343750A (en) | 2019-02-15 |
| CN109343750B true CN109343750B (en) | 2021-09-07 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202870785U (en) * | 2012-10-12 | 2013-04-10 | 成都吉锐触摸技术股份有限公司 | Dust-proof and water-proof surface acoustic wave touch screen |
| CN103530002A (en) * | 2013-08-28 | 2014-01-22 | 友达光电股份有限公司 | Sensing device and positioning method |
| CN105122194A (en) * | 2013-03-15 | 2015-12-02 | Elo触摸技术公司 | Acoustic touch apparatus and methods using touch sensitive lamb waves |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5717434A (en) * | 1992-07-24 | 1998-02-10 | Toda; Kohji | Ultrasonic touch system |
| TW201335817A (en) * | 2012-02-21 | 2013-09-01 | Ritedia Corp | Surface acoustic wave touchscreen and method for manufacturing the same |
| KR20150058774A (en) * | 2013-11-21 | 2015-05-29 | 삼성전자주식회사 | Touch pen, method and apparatus for providing touch functions |
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2018
- 2018-10-08 CN CN201811167610.5A patent/CN109343750B/en active Active
- 2018-10-17 TW TW107136477A patent/TWI690833B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202870785U (en) * | 2012-10-12 | 2013-04-10 | 成都吉锐触摸技术股份有限公司 | Dust-proof and water-proof surface acoustic wave touch screen |
| CN105122194A (en) * | 2013-03-15 | 2015-12-02 | Elo触摸技术公司 | Acoustic touch apparatus and methods using touch sensitive lamb waves |
| CN103530002A (en) * | 2013-08-28 | 2014-01-22 | 友达光电股份有限公司 | Sensing device and positioning method |
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| TWI690833B (en) | 2020-04-11 |
| TW202014865A (en) | 2020-04-16 |
| CN109343750A (en) | 2019-02-15 |
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