CN102306071A - Multipoint SAW (surface acoustic wave) screen with locating axes with different frequencies - Google Patents
Multipoint SAW (surface acoustic wave) screen with locating axes with different frequencies Download PDFInfo
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- CN102306071A CN102306071A CN201110254556A CN201110254556A CN102306071A CN 102306071 A CN102306071 A CN 102306071A CN 201110254556 A CN201110254556 A CN 201110254556A CN 201110254556 A CN201110254556 A CN 201110254556A CN 102306071 A CN102306071 A CN 102306071A
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Abstract
The invention discloses a multipoint SAW (surface acoustic wave) screen with locating axes with different frequencies. The multipoint SAW screen comprises a controller, an X-axis locating device, a Y-axis locating device and a Z-axis locating device, wherein any one of the X-axis locating device, the Y-axis locating device and the Z-axis locating device and the other two axis locating devices perform acoustic wave transmission with different frequencies, and the longer the stripe array distance is, the lower the frequency of adopted acoustic wave is. In the invention, according to the lengths of the different stripe arrays (the X-axis, the Y-axis and the Z-axis), the different transmitting frequencies matching with the arrays are selected, thus overcoming the problem that the mutual crosstalk of different axial signals is caused when the theoretical 45 degrees or 135 degrees can not be ensured and different axial acoustic waves can not be ensured to pass through the other stripes arrays due to the straightness of the stripes and local deformations in an existing acoustic wave screen; meanwhile, the different characteristics of the SAWs with the different frequencies in the process of passing through the stripe arrays are utilized to adjust different axial signal intensities, so that the intensities of different axial electrical signals are consistent basically, thereby being beneficial to signal processing of the controller.
Description
Technical field
The present invention relates to a kind of surface acoustic wave touch screen, relate in particular to a kind of acoustic wave touching screen that can anti-interference raising surface acoustic wave performance.
Background technology
Current touch-screen mainly contains types such as surface acoustic wave, infrared, resistance, electric capacity.Characteristics such as surface acoustic wave touch screen tool resolution is high, the response time is short, fine, the anti-riot property of stability is good, light transmission is good; Infrared screen touch-screen resolution is general, the response time is long, general, the anti-riot property of stability is good, light transmission is good, easily by characteristics such as light interference; Characteristics such as electric resistance touch screen tool resolution height, response time weak point, good stability, poor, the anti-riot property of light transmission difference; Characteristics such as capacitance touch screen tool resolution height, the response time is short, stability is general, better, the easy drift of general, the anti-riot property of light transmission.In sum; Surface acoustic wave touch screen is because it has performance index height, reliable and stable, advantage such as environmental adaptation is strong; And surface acoustic wave touch screen is the highest touch-screen of cost performance in several touch-screens, is the touch-screen of tool popularizing value in several main flow touch-screens.
Existing general surface acoustic wave touching screen has two mutual vertical physical positioning axles of X-axis and Y-axis; And the two point surface acoustic wave also has the Z axle; General X-axis, Y-axis and Z axle adopt is that the sound wave of same frequency is distributed in the screen surface, and current surface wave frequency is 5.54MHz mostly.The disclosed method that is used to improve surface acoustic wave screen performance of patent No. CN200810046542.7 for example, open day is on April 8th, 2009, having introduced has the surface wave frequency identical X-axis, Y-axis, is 2.56MHz-3.89MHz.
Existing surface acoustic wave screen X locating device is spent by dredging the accurate emission striped array of close spacing and accepting the striped array and form by 1 transmitting transducer, 1 receiving transducer and corresponding 45 degree or 135.In like manner the Y-axis locating device also is that 1 transmitting transducer, 1 receiving transducer and corresponding 45 degree or 135 are spent by dredging the accurate emission striped array of close spacing and accepting the striped array and form; Because it is that theoretical 45 degree and each root is straight that technology can't guarantee striped battle array example in the locating device, can cause the acoustic signals of directions X to be received by Y, or being received by X of Y, cause waveform to disturb, controller can't normally be discerned.Because the display developing direction is compact, frivolous; So striped and striped and transducer installation site in transducer and the Y-axis locating device that sound wave screen is gone up in the X-axis locating device are very little, in acoustic wave touching screen X-axis locating device and the Y-axis locating device X receiving transducer abut against together the more serious of mutual interference mutually.
Existing sound wave screen is because length breadth ratio is 4:3 or 16:9 or 16:10.The path that the sound wave of length direction X-axis is passed by can be greater than the width Y direction; A little less than causing on the X-axis acoustic signals under the situation of same frequency than the Y-axis acoustic signals many; And controller need that X, two groups of signals of Y are amplified to equality strength when handling could computing; The enlargement factor that causes X-axis is much larger than Y-axis; Simultaneously the noise in the X-axis signal also is exaggerated (noise in the Y-axis signal); This interference noise can exert an influence to touch signal, therefore is unfavorable for the controller processing.
And two point sound wave screen also can common single-point screen body Y increase Z axle locating device on the basis of axle; The striped array of Z axle locating device is parallel with X-axis, Y-axis striped array respectively; Make the X-axis sound wave pass through Z axle striped array; Or Z axle sound wave passes through X-axis striped array; Y-axis and Z axle also have same case, so interference problem can be more serious.
Summary of the invention
The objective of the invention is to overcome the problems referred to above that existing surface acoustic wave touch screen exists; A kind of multiple spot surface acoustic wave screen of locating shaft different frequency is provided; The present invention selects the different transmission frequencies that matches for use according to the length of disalignment striped array (X, Y, Z axle); Overcome existing sound wave screen because the linearity of striped and local deformation and can not guarantee that 45 theoretical degree or 135 degree and disalignment sound wave pass through other striped array, and the problem that causes disalignment to crosstalk each other to signal; The different qualities of surface acoustic wave when passing through the striped array that utilizes different frequency simultaneously also the scalable disalignment to signal intensity, make disalignment to the strong and weak basically identical of electric signal, help the signal Processing of controller.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of multiple spot surface acoustic wave screen of locating shaft different frequency; Comprise controller, X-axis locating device, Y-axis locating device and Z axle locating device; It is characterized in that: arbitrary locating device and other two axle locating devices in X-axis locating device, Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission, and the frequency of sound wave of the longer employing of striped array distance is low more.
Said X-axis locating device, Y-axis locating device are all different with the frequency of Z axle locating device.
Said X-axis locating device is identical with the frequency of Y-axis locating device, and the frequency of Z axle locating device is different.
Said X-axis locating device is identical with the frequency of Z axle locating device, and the frequency of Y-axis locating device is different.
Said Y-axis locating device is identical with the frequency of Z axle locating device, and the frequency of X-axis locating device is different.
In said X-axis locating device, Y-axis locating device and the Z axle locating device; Each locating device can be according to the different transmission frequencies of different choice 6Mhz-5Mhz or the 4.5Mhz-3.5Mhz or the 3Mhz-2Mhz of position, and the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz.
The frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 3Mhz-2Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 6Mhz-5Mhz.
The frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 6Mhz-5Mhz.
The frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 6Mhz-5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz.
The frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 3Mhz-2Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz.
Employing the invention has the advantages that:
One, owing to adopted the sound waves of different frequencies signal in X-axis locating device, Y-axis locating device or the Z axle locating device, makes that signal is isolated easily between each locating device, disturb, help shielding the steady operation of body thereby reduced the screen soma.
Two, owing to utilize the also intensity of scalable X, Y, Z direction of different qualities that the table ripple of different frequency passes through the striped array, change the strong and weak condition of different of surface acoustic wave signal between the existing screen body disalignment, reduced controller the Signal Processing difficulty.
Three, because disalignment to adopting different frequency of sound wave, utilizes the table ripple of different frequency to pass through the different qualities of striped array, can remedy disalignment to the inconsistent problem of signal, help signal Processing.
Four, because disalignment to making signal amplitude approaching basically through adjustment distinct transmit frequency, helps shielding system.
Five, since disalignment to making signal amplitude approaching basically through adjustment distinct transmit frequency, large scale screen body provides condition in order to design more.
Six; Among the present invention; The X-axis locating device; Arbitrary locating device and other two axle locating devices in Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission; And the frequency of sound wave of the longer employing of striped array distance is low more; According to V=f* λ; Two axial surface acoustic wave wavelength are greater than another axial surface acoustic wave wavelength; According to surface acoustic wave screen principle; The striped array is made up of many reflecting elements; But each reflecting element is the antireflection part sound wave usually; It consumes a part of sound wave and remainder is passed through along the axle of array, and the projectile energy of back one reflecting element derives from the transmission of last reflecting element.Theoretical according to kymatology, the sound wave that wavelength is big has more the ability of crossing object, makes two big axial reflecting elements of surface acoustic wave wavelength have the appropriate balance of emissivity, the proportion of goods damageds, transmissivity.
Seven, among the present invention; Owing to there are two direction of principal axis to adopt the method for the big wavelength of low frequency to make the surface acoustic wave energy lift; Improved this diaxon than the energy loss that another path length causes, made the energy of X, Y-axis and Z axle more consistent, better handled when controller is handled.
Eight; Among the present invention; The X-axis locating device; In Y-axis locating device and the Z axle locating device; Each locating device can be according to the different transmission frequencies of different choice 6Mhz-5Mhz or the 4.5Mhz-3.5Mhz or the 3Mhz-2Mhz of position; The X-axis transducer of X-axis locating device; The reference frequency bandwidth of the Z axle transducer of the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz; X; Y and Z axle transducer reference frequency bandwidth are located at 100KHz-500KHz; X; The Y-axis transducer can not receive the Y-axis signal; In like manner the Z axle can not received X yet; The Y-axis signal; X; The Y-axis signal is independent of each other with the Z axis signal mutually; The signal that control is received is purer, reduces and disturbs.
Description of drawings
Fig. 1 is applied in the structural representation in the multi-point touch panel for the present invention
Be labeled as among the figure: 1, X transmitting transducer; 2, X receiving transducer, 3, X emission striped array, 4, X receives the striped array; 5, Y transmitting transducer; 6, Y receiving transducer, 7, Y emission striped array, 8, Y receives the striped array; 9, Z transmitting transducer; 10, Z receiving transducer, 11, Z emission striped array, 12, Z receives the striped array.
Embodiment
Embodiment 1
The two point touch-screen is on the basis of single-point touches screen X, two axles of Y, to increase the Z axle, and wherein X, Y locating shaft adopt the frequency transmission (also X, Y-axis can be adopted different frequency transmission respectively) of 4.5Mhz-3.5Mhz; The Z locating shaft adopts the frequency transmission of 6Mhz-5Mhz, and concrete mode is following.
The reference frequency of adjustment X, Y transmitting transducer is in 4.5Mhz-3.5Mhz; The reference frequency of X, Y receiving transducer is in 4.5Mhz-3.5Mhz; The frequency of X, Y emission striped array and reception striped array is positioned at 4.5Mhz-3.5Mhz; According to V=f* λ; Adjust the striped array arrangement, and X, Y emission striped array and reception striped array are placed on the coboundary and the lower edge on the long limit of screen body.The transmitting transducer of X, Y is corresponding with X, Y emission striped array and reception striped array with receiving transducer.
The reference frequency of adjustment Z transmitting transducer is in 6Mhz-5Mhz; The reference frequency of Z receiving transducer is in 6Mhz-5Mhz; Z emission striped array is positioned at 6Mhz-5Mhz with the frequency that receives the striped array; According to V=f* λ; Adjust the striped array arrangement, and Z is launched the striped array and receives left hand edge and the right edge that the striped array is placed on the minor face of screen body.The transmitting transducer of Z is corresponding with reception striped array with Z emission striped array with receiving transducer.
Because X, Y-axis have adopted frequency to be lower than the method for Z axle; According to V=f* λ; The surface acoustic wave wavelength of X, Y direction is greater than the surface acoustic wave wavelength of Z direction; According to surface acoustic wave screen principle; The striped array is made up of many reflecting elements; But each reflecting element is the antireflection part sound wave usually, and it consumes a part of sound wave and remainder is passed through along the axle of array, and the projectile energy of back one reflecting element derives from the transmission of last reflecting element.Theoretical according to kymatology, the sound wave that wavelength is big has more the ability of crossing object, makes the reflecting element of X, Y direction have the appropriate balance of emissivity, the proportion of goods damageds, transmissivity.
Because X, Y-axis have adopted the method for the big wavelength of low frequency to make the surface acoustic wave energy lift, have improved X, Y-axis than the energy loss that Z axle path length causes, and make the energy of X, Y-axis and Z axle more consistent, better handle when controller is handled.
Because X, Y-axis have adopted frequency 4.5Mhz-3.5Mhz; And the Z axle has adopted frequency 6Mhz-5Mhz method; X, Y and Z axle transducer reference frequency bandwidth are located at 500KHZ; X, Y-axis transducer can not receive the Y-axis signal; In like manner the Z axle can not received X, Y-axis signal yet; X, Y-axis signal are independent of each other with the Z axis signal mutually, and the signal that control is received is purer, reduce and disturb.
In the present embodiment, X, Y locating shaft adopt the frequency transmission of 4.5Mhz-3.5Mhz, the frequency that can select such as 4.5Mhz, 4.0 Mhz or 3.5Mhz etc.The Z locating shaft adopts the frequency transmission of 6Mhz-5Mhz, the frequency that can select such as 6Mhz, 5.5 Mhz or 5Mhz.And the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz, can select 100KHz, 300 KHz or 500KHz etc.
A kind of multiple spot surface acoustic wave screen of locating shaft different frequency; Comprise controller, X-axis locating device, Y-axis locating device and Z axle locating device; Arbitrary locating device and other two axle locating devices in X-axis locating device, Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission, and the frequency of sound wave of the longer employing of striped array distance is low more.
In the said X-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 3Mhz-2Mhz, and corresponding emission striped array is 3Mhz-2Mhz with the frequency that receives the striped array; In the Y-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 4.5Mhz-3.5Mhz, and corresponding emission striped array is 4.5Mhz-3.5Mhz with the frequency that receives the striped array; In the Z axle locating device, the reference frequency of transmitting transducer and receiving transducer is 6Mhz-5Mhz, and corresponding emission striped array is 6Mhz-5Mhz with the frequency that receives the striped array.
In the present embodiment, the X locating shaft adopts the frequency transmission of 3Mhz-2Mhz, the frequency that can select such as 3Mhz, 2.5Mhz or 2Mhz etc.The Y locating shaft adopts the frequency transmission of 4.5Mhz-3.5Mhz, the frequency that can select such as 4.5Mhz, 4.0 Mhz or 3.5Mhz etc.The Z locating shaft adopts the frequency transmission of 6Mhz-5Mhz, the frequency that can select such as 6Mhz, 5.5 Mhz or 5Mhz.And the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz, can select 100KHz, 300 KHz or 500KHz etc.
In more than describing is that X-axis is defined as major axis, so the relative Y-axis of X-axis, Z axle select the low frequency transmission for use, then should select the high-frequency transmission for use if instead X-axis is defined as minor axis.
Embodiment 3
A kind of multiple spot surface acoustic wave screen of locating shaft different frequency; Comprise controller, X-axis locating device, Y-axis locating device and Z axle locating device; Arbitrary locating device and other two axle locating devices in X-axis locating device, Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission, and the frequency of sound wave of the longer employing of striped array distance is low more.
In the said X-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 4.5Mhz-3.5Mhz, and corresponding emission striped array is 4.5Mhz-3.5Mhz with the frequency that receives the striped array; In the Y-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 6Mhz-5Mhz, and corresponding emission striped array is 6Mhz-5Mhz with the frequency that receives the striped array; In the Z axle locating device, the reference frequency of transmitting transducer and receiving transducer is 4.5Mhz-3.5Mhz, and corresponding emission striped array is 4.5Mhz-3.5Mhz with the frequency that receives the striped array.
In the present embodiment, X, Z locating shaft adopt the frequency transmission of 4.5Mhz-3.5Mhz, the frequency that can select such as 4.5Mhz, 4.0 Mhz or 3.5Mhz etc.The Y locating shaft adopts the frequency transmission of 6Mhz-5Mhz, the frequency that can select such as 6Mhz, 5.5 Mhz or 5Mhz.And the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz, can select 100KHz, 300 KHz or 500KHz etc.
A kind of multiple spot surface acoustic wave screen of locating shaft different frequency; Comprise controller, X-axis locating device, Y-axis locating device and Z axle locating device; Arbitrary locating device and other two axle locating devices in X-axis locating device, Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission, and the frequency of sound wave of the longer employing of striped array distance is low more.
In the said X-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 3Mhz-2Mhz, and corresponding emission striped array is 3Mhz-2Mhz with the frequency that receives the striped array; In the Y-axis locating device, the reference frequency of transmitting transducer and receiving transducer is 4.5Mhz-3.5Mhz, and corresponding emission striped array is 4.5Mhz-3.5Mhz with the frequency that receives the striped array; In the Z axle locating device, the reference frequency of transmitting transducer and receiving transducer is 4.5Mhz-3.5Mhz, and corresponding emission striped array is 4.5Mhz-3.5Mhz with the frequency that receives the striped array.
In the present embodiment, Y, Z locating shaft adopt the frequency transmission of 4.5Mhz-3.5Mhz, the frequency that can select such as 4.5Mhz, 4.0 Mhz or 3.5Mhz etc.The X locating shaft adopts the frequency transmission of 3Mhz-2Mhz, the frequency that can select such as 3Mhz, 2.5 Mhz or 2Mhz.And the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz, can select 100KHz, 400 KHz or 500KHz etc.
Claims (10)
1. the multiple spot surface acoustic wave of a locating shaft different frequency shields; Comprise controller, X-axis locating device, Y-axis locating device and Z axle locating device; It is characterized in that: arbitrary locating device and other two axle locating devices in X-axis locating device, Y-axis locating device and the Z axle locating device adopt the sound waves of different frequencies transmission, and the frequency of sound wave of the longer employing of striped array distance is low more.
2. the multiple spot surface acoustic wave of locating shaft different frequency according to claim 1 screen is characterized in that: said X-axis locating device, Y-axis locating device are all different with the frequency of Z axle locating device.
3. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 1, it is characterized in that: said X-axis locating device is identical with the frequency of Y-axis locating device, and the frequency of Z axle locating device is different.
4. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 1, it is characterized in that: said X-axis locating device is identical with the frequency of Z axle locating device, and the frequency of Y-axis locating device is different.
5. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 1, it is characterized in that: said Y-axis locating device is identical with the frequency of Z axle locating device, and the frequency of X-axis locating device is different.
6. the multiple spot surface acoustic wave according to claim 1,2,3,4,5 described locating shaft different frequencies shields; It is characterized in that: in said X-axis locating device, Y-axis locating device and the Z axle locating device; Each locating device can be according to the different transmission frequencies of different choice 6Mhz-5Mhz or the 4.5Mhz-3.5Mhz or the 3Mhz-2Mhz of position, and the reference frequency bandwidth of the Z axle transducer of the X-axis transducer of X-axis locating device, the Y-axis transducer of Y-axis locating device and Z axle locating device is 100KHz-500KHz.
7. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 2, it is characterized in that: the frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 3Mhz-2Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 6Mhz-5Mhz.
8. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 3, it is characterized in that: the frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 6Mhz-5Mhz.
9. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 4, it is characterized in that: the frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 6Mhz-5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz.
10. the multiple spot surface acoustic wave screen of locating shaft different frequency according to claim 5, it is characterized in that: the frequency of the transmitting transducer of said X-axis locating device, receiving transducer and striped array is 3Mhz-2Mhz; The frequency of the transmitting transducer of Y-axis locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz; The frequency of the transmitting transducer of Z axle locating device, receiving transducer and striped array is 4.5Mhz-3.5Mhz.
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| CN201110254556A CN102306071A (en) | 2011-08-31 | 2011-08-31 | Multipoint SAW (surface acoustic wave) screen with locating axes with different frequencies |
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| CN201110254556A CN102306071A (en) | 2011-08-31 | 2011-08-31 | Multipoint SAW (surface acoustic wave) screen with locating axes with different frequencies |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808868A (en) * | 2015-05-28 | 2015-07-29 | 成都吉锐触摸技术股份有限公司 | Method for realizing multi-touch of surface acoustic wave touch screen |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5850118A (en) * | 1997-05-05 | 1998-12-15 | Toda; Kohji | Ultrasonic touch-position sensitive device |
| CN101719043A (en) * | 2009-12-29 | 2010-06-02 | 成都吉锐触摸技术股份有限公司 | Multi-point surface acoustic wave touch screen |
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2011
- 2011-08-31 CN CN201110254556A patent/CN102306071A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5850118A (en) * | 1997-05-05 | 1998-12-15 | Toda; Kohji | Ultrasonic touch-position sensitive device |
| CN101719043A (en) * | 2009-12-29 | 2010-06-02 | 成都吉锐触摸技术股份有限公司 | Multi-point surface acoustic wave touch screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808868A (en) * | 2015-05-28 | 2015-07-29 | 成都吉锐触摸技术股份有限公司 | Method for realizing multi-touch of surface acoustic wave touch screen |
| CN104808868B (en) * | 2015-05-28 | 2017-09-12 | 成都吉锐触摸技术股份有限公司 | A kind of method that surface acoustic wave touch screen realizes multiple point touching |
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Application publication date: 20120104 |