Telegraphy – Systems – Position coordinate determination for writing
Patent
1993-02-16
1994-07-12
Chin, Stephen
Telegraphy
Systems
Position coordinate determination for writing
345177, 367907, G08C 2100
Patent
active
053290704
ABSTRACT:
An acoustic touch position sensor is shown in which a transducer coupled to a side of a substrate imparts a shear wave into the substrate for propagation along a first axis. A reflective array disposed along the first axis reflects portions of the shear wave along a plurality of parallel paths extending across a touch surface of the substrate to a second reflective array the axis of which is parallel to the first axis. The second reflective array reflects the shear waves incident thereto a receiving transducer mounted on the side of the substrate. A touch on the substrate results in perturbation in the shear wave which is sensed to determine the axial position of the touch on the substrate. A laminated touch panel is provided such that a back plate of any desired thickness is bounded onto the substrate. A non-shear wave coupling adhesive may be used to bond the back plate to the substrate. Alternatively, the back plate may be chosen such that the velocity at which acoustic waves propagate in the back plate is greater than the velocity at which acoustic waves propagate in the substrate.
REFERENCES:
patent: 3568102 (1971-03-01), Tseng
patent: 3673327 (1972-06-01), Johnson et al.
patent: 3860874 (1975-01-01), Malone et al.
patent: 3883831 (1975-05-01), Williamson et al.
patent: 3916099 (1975-10-01), Hlady
patent: 4642423 (1987-02-01), Adler
patent: 4644100 (1987-02-01), Brenner et al.
patent: 4645870 (1987-02-01), Adler
patent: 4665282 (1987-05-01), Sato et al.
patent: 4700176 (1987-10-01), Adler
patent: 4746914 (1988-05-01), Adler
patent: 4791416 (1988-12-01), Adler
patent: 4880665 (1989-11-01), Adler et al.
patent: 4910363 (1990-03-01), Kobayashi
patent: 5072427 (1991-12-01), Knowles
patent: 5162618 (1992-11-01), Knowles
patent: 5177327 (1993-01-01), Knowles
"The IMCON Pulse Compression Filter and Its Application," Tom A. Martin, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-21, No. 4, Apr. 1973.
"Ultrasonic Delay Lines Shear Modes In Stripes," A. H. Meitzler, IRE Transactions On Ultrasonic Engineering, Jun. 1960.
"The Use of Surface-Elastic-Wave Reflective Gratings in Large Time-Bandwidth Pulse-Compression Filters," Richard C. Williamson and Henry I. Smith, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-21, No. 4, Apr. 1973.
"Large-Time-Bandwidth-Product Surface Wave Pulse Compressor Employing Reflective Gratings," R. C. Williamson et al., Electronics Letters, vol. 8, No. 16, Aug. 10, 1972.
"A Closed-Form Analysis of Reflective-Array Gratings," P. V. Wright, IEEE Ultrasonic Symposium, 1980.
"An Economical Touch Panel Using SAW Absorption," Robert Adler, and Peter J. Desmares, IEEE Transactions on Ultrasonics, Perroelectrics, and Frequency Control, vol. UFFC-34, No. 2, Mar. 1987.
"Mechanical Input Admittance of Ultrasonic Delay Lines Operating In Torsional or Shear Modes," Morio Onoe, The Journal of the Acoustical Society of America, vol. 35, No. 7, pp. 1003-1008, Jul. 1963.
"On Waves In An Elastic Plate," Horace Lamb, F.R.S.
Physical Acoustics--Principles and Methods, Warren P. Mason, Academic Press, vol. 1--Part A, Chapter 2 and 6; 1964.
Rayleigh and Lamb Waves--Physical Theory and Application, Igor Aleksandrovich Viktorov, 1967.
"Acoustic Touch Technology Adds a New Input Dimension," Mark Platshon, Elographics--Reprint from Computer Design, Mar. 18, 1988 edition.
"Surface Elastic Waves," Richard M. White, Proceedings of the IEEE, vol. 58, No. 8, Aug. 1970.
"Lamb Wave Graphic Tablet," Electronics Letters, vol. 23, No. 19, pp. 982-984, Sep. 10, 1987.
Carroll Touch Inc.
Chin Stephen
Loomis Paul
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