Touch Technology: DST (Bending Wave)

Dispersive Signal Technology - Bending Wave

Sensor Materials

Glass substrate, piezoelectric transducers

Principle of Operation

  • Touch creates a bending wave through the medium of the glass substrate.
  • Bending waves radiate to the sensor edges and are detected by piezoelectric receptors in border area.
  • Electronics compute touch location based on algorithms or by use of signal comparison references.

Illustration 1: Dispersive Signal Technology

Pros and Cons

Impervious to surface contaminantsFew major suppliers
Touch activated by bare finger, gloved finger, or stylusLimited to one resolvable point with gesture capability
Transmission is > 90%
Able to offer flat front surface design (no bezel)

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