Virtual keyboard

Abstract

The present invention discloses a virtual keyboard, which includes a virtual region, at least two vibration sensors, a storage unit and a processing unit. The virtual region is formed on a surface and has a plurality of virtual keys. The vibration sensors are provided on the surface. The storage unit is used to store a plurality of data, each of the plurality of data recording an actual location and signification of each of the virtual keys. The processing unit is electronically connected to the vibration sensors and the storage unit. When a vibration signal is caused by touching the virtual region, each of the vibration sensors receives the vibration signal and respectively sends an output signal corresponding to the vibration signal to the processing unit. The processing unit determines a vibration source location of the vibration signal based on the output signals and locates a knocked virtual key by comparison of the vibration source location and the actual location recorded in the data, and generates a key signal according to the signification of the knocked key of the virtual keys.

Dependencies are inferred from the claim text.