Patent ID: 8085170

Claim:
A wireless communication device, comprising: a communicating module configured for receiving and sending character messages; a sensor module configured for receiving vibrations and transforming the vibrations into input signals; wherein the vibrations are caused by knocking and pressing actions applied to the wireless communication device, and when a rest time between two adjacent ones of the knocking/pressing actions is less than a predetermined upper input limit, vibrations caused by the two knocking/pressing actions are transformed into input signals for the same character; when a rest time between two adjacent ones of the knocking/pressing actions is larger than a predetermined floor input limit, vibrations caused by the two knocking/pressing actions are respectively transformed into input signals for two different characters; and a decoding module electronically connected to the communicating module and the sensor module, the decoding module receiving the input signals from the sensor module and transforming the input signals into character messages and transferring the character messages to the communicating module to send.