Contact sensitive device

摘要

Bending wave vibration is used to calculate information relating to a contact on a contact sensitive device. The contact sensitive device has a member capable of supporting bending waves, and a device attached to the member measures bending wave propagation in the member to determine a measured bending wave signal. The measured bending wave signal is processed to calculate information relating to the contact. The contact sensitive device may comprise a transparent touch sensitive plate mounted in front of a display device.

主权项

1. A method of determining information relating to a contact on an active contact sensitive device comprising the steps of:
providing a panel-form member capable of supporting bending wave vibration; generating bending wave vibration in the member from one location on the member to probe for information relating to a contact; contacting the member at a discrete location to produce a change in the generated bending wave vibration in the member; measuring the changed bending wave vibration in the member at two locations on the member to determine a measured bending wave signal; and processing the measured bending wave signal to calculate information relating to the contact including applying a correction to convert the measured bending wave signal to a propagation signal from a non-dispersive wave source.