Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Acoustic touch position sensor using shear wave propagation










Image Number 3 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
Instance management of code in a database
Fast carrier allocation in multi-carrier systems
Ice data collection system
Authentication for social networking messages
Television with a stand
Method of forming solderable side-surface terminals of quad no-lead frame (QFN) integrated circuit packages
Mask blank, transfer mask, and film denseness evaluation method
  Randomly Featured Patents
Method of reducing nitrile into a corresponding alcohol
All vehicle mats
Cache intervention from a cache line exclusively holding an unmodified value
Method and apparatus for estimating the number of occurrences of frequent values in a data set
Method and apparatus for automated testing of a video decoder
Planta gold nanoparticle manufacture
Multicolor infrared focal plane arrays
Hybrid keypad including full travel keys and minimal travel keys
Insecticidal substituted phenyl derivatives
Portable collapsible boat