| 摘要 |
PURPOSE: A radio frequency electronic card having a sound emission function is provided to increase an advertising effect and induce an interest from a user by outputting sound without an additional power source. CONSTITUTION: A second antenna(40) is insulated from a first antenna(20), and forms an electromagnetic field caused by an RF(Radio Frequency) signal. A circuit unit(45) is electrically connected to the second antenna, and induces driving current from the electromagnetic filed. A speaker(50) outputs sound by the driving current by being electrically connected to the circuit unit. A memory of an IC chip(30) stores acoustic information for the sound, and the speaker is a piezoelectric speaker. |
