Resources Contact Us Home
Acoustic touch position sensor using shear wave propagation

Image Number 2 for United States Patent #5260521.

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 is disposed along the first axis to reflect 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 axis of the first reflective array. The second reflective array reflects the shear waves incident thereto to a transducer mounted on the side of the substrate and responsive to shear waves propagated thereto for providing a signal representative of these shear waves. A touch on the substrate results in a partial absorption of the energy in the shear wave so as to produce a perturbation therein which is sensed to determine the axial position of the touch on the substrate. In a second embodiment a single transducer and reflective array is provided for each axis, a coordinate on which is to be determined. In a third embodiment of the present invention, a single transducer is provided to transmit and receive shear waves propagating along perpendicular parallel paths.

  Recently Added Patents
Intelligent and automated code deployment
Surface-emitting laser light source using two-dimensional photonic crystal
Attribute information providing system
Sensor interface engineering
Pharmaceutical compositions of paclitaxel, paclitaxel analogs or paclitaxel conjugates and related methods of preparation and use
Powerline communication device with load characterization functionality
Reliable and accurate usage detection of a software application
  Randomly Featured Patents
Sheet-like electrooptical component, light-guide configuration for serial, bidirectional signal transmission and optical printed circuit board
Encoding and decoding system
Medium scalene high visibility flag
Method of and apparatus for transmitting image information
Source server
Method and apparatus for enhanced autonomous GPS
Adaptive filter model for motor vehicle sensor signals
Table top water fountain with infinity pool
Sliding-tilt unit and mobile device using the same
Green ceramic of lead-free glass, conductive carbon, silicone resin and AlPO.sub.4, useful, after firing, as an electrical resistor