Grating transducer for acoustic touchscreens

Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

178 1804, G09G 500, G06K 1114, G08C 2100

Patent

active

060914068

ABSTRACT:
An acoustic touch sensing device, comprising a substrate, having a surface; and an acoustic wave transducer, transducing a bulk wave in said substrate propagating through said substrate along an axis intersecting said surface, wherein energy of said bulk wave is coupled to a wave having a converted wave mode with appreciable energy at said surface and propagating along said surface. The device may include a set of scattering centers to couple the bulk wave to a Rayleigh wave or plate wave. The Rayleigh wave or plate wave may be dispersed over a region of the substrate, and analyzed to detect a perturbation indicative of a position of touch.

REFERENCES:
patent: Re33151 (1990-01-01), Adler
patent: 3673327 (1972-06-01), Johnson et al.
patent: 3893047 (1975-07-01), Lardat
patent: 4642423 (1987-02-01), Adler
patent: 4644100 (1987-02-01), Brenner et al.
patent: 4645870 (1987-02-01), Adler
patent: 4700176 (1987-10-01), Adler
patent: 4746914 (1988-05-01), Adler
patent: 4791416 (1988-12-01), Adler
patent: 5072427 (1991-12-01), Knowles
patent: 5162618 (1992-11-01), Knowles
patent: 5177327 (1993-01-01), Knowles
patent: 5243148 (1993-09-01), Knowles
patent: 5260521 (1993-11-01), Knowles
patent: 5329070 (1994-07-01), Knowles
patent: 5400788 (1995-03-01), Dias et al.
patent: 5451723 (1995-09-01), Huang et al.
patent: 5591945 (1997-01-01), Kent
patent: 5648643 (1997-07-01), Knowles et al.
patent: 5673041 (1997-09-01), Chatigny et al.
patent: 5708461 (1998-01-01), Kent
patent: 5854450 (1998-12-01), Kent
R.F. Humphreys and E.A. Ash, "Acoustic Bulk-surface-wave-transducer," Electronics Letters, vol. 5, No. 9, May 1, 1969.
Masao Takeuchi & Hiroshi Shimuzu, "Theoretical analysis of grating couplers for surface acoustic waves," Journal of the Acoustic Society of Japan, 36(11): 543-557 (Jun. 24, 1980).
J. Melngailis & R.C. Williamson, "Interaction of Surface Waves and Bulk Waves in Gratings: Phase shifts and sharp Surface Waves/Reflected Bulk Wave Resonances," Proc. 1978 IEEE Ultrasonics Symposium, p. 623.
Herman A. Haus, Annalisa Lattes & John Melngailis "Grating Coupling between Surface Acoustic Waves and Plate Modes", IEEE Transactions on Sonics and Ultrasonics, p. 258 (Sep. 1980).
RF Humphryes & EA ASH "Acoustic Bulk-surface-wave transducer," Electronics Letters (vol. 5 No. 9) May 1, 1969.
M. Takeuchi & K. Yamanouchi "Undirectional excitation of plate waves in a periodic structure," Res. Inst. Elec. Comm. Tohoku University, (Oct. 1991) .

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Grating transducer for acoustic touchscreens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Grating transducer for acoustic touchscreens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Grating transducer for acoustic touchscreens will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2041637

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.