Patent ID: 9549235
Date: 2017-01-17
CPC Classifications: G06F,G10L,H04R

Claim:
1. A user interface apparatus using a speaker, comprising: a user input pad that forms at least a portion of the exterior of the speaker and configured to generate an impact sound wave based on an external impact, wherein the user input pad transmits the impact sound wave to a vibration plate of the speaker; an impact sound wave recognizer configured to receive a feedback of an output signal output via the speaker and separate a reverse current signal due to the impact sound wave included in the feedback signal, wherein the reverse current signal is generated by electromagnetic induction based on movement of a voice coil of the speaker due to transmission of the impact sound wave by the user input pad to the vibration plate of the speaker; and a controller configured to analyze a waveform of the reverse current signal separated by the impact sound wave recognizer to recognize a user input pattern, and output a control signal that corresponds to the recognized user input pattern.