Resources Contact Us Home
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
Solid-state image capture device and image capture apparatus
Information processing apparatus, information processing method, and program
LED package chip classification system
Encoding digital content based on models for predicting similarity between exemplars
Nitrogen and hindered phenol containing dual functional macromolecular antioxidants: synthesis, performances and applications
Monitoring agent programs in a distributed computing platform
  Randomly Featured Patents
Burner with wind ring
Quick connector for high pressure applications, assembly tool and method
LED device having two LED dies separated by a dam
Gate formation method for reduced poly-depletion and boron penetration
Sprinkler provided with a built-in mechanism for dispensing detergent
Method for reducing on resistance and improving current characteristics of a MOSFET
Method for making IOL insertion apparatus
Opto-electronic scale reading apparatus
Device for minimally invasive internal tissue removal
Optical scanning device and image forming apparatus