Acoustic condition sensor employing a plurality of mutually non-orthogonal waves
August 12, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re33151 3673327 Touch control system for use with or having a three-dimensionally curved touch surface Surface acoustic wave touch panel system Touch control system for use with a display panel or other touch controlled device Tough control arrangement for graphics display apparatus Cathode ray tube for use in a touch panel display system Touch control system for controllable apparatus Acoustic touch position sensor with shear to lamb wave conversion Plate-mode ultrasonic sensor InventorApplicationNo. 695716 filed on 08/12/1996US Classes:178/18.04, Acoustical (e.g., vibration, ultrasonic, etc.)178/18.01, Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)178/18.03, Writing digitizer pad345/177Including surface acoustic detectionExaminersPrimary: Shankar, VijayAttorney, Agent or FirmForeign Patent References
International ClassesG08C 021/00G09G 005/00 AbstractA touch sensor, having an acoustic wave transmissive medium having a surface and a touch sensitive portion of the surface, a transducer system for emitting acoustic energy into the medium, and a receiver system for receiving the acoustic energy from the substrate as at least two distinct sets of waves, a portion of each of which overlap temporally at the receiver system or overlap physically by propagating in the touch sensitive portion along axes which are substantially non-orthogonal, the receiver system determining a position or a waveform perturbing characteristic of a touch on the touch sensitive portion. The receiver may be an amplitude detector or be sensitive to a phase-amplitude characteristic of the received acoustic waves. | |
