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

ProsCons
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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