| 摘要 |
PURPOSE: A device for a thin film speaker is provided to easily produce and install, to reduce limitation in arrangement of component for a television according to mutual interference, and to easily vary the capacity of the speaker. CONSTITUTION: Transformation is generated between vibrating plates by a fine signal in a thin film speaker. When a signal is inputted through an antenna(21) for being tuned and modulated by a tuner(22) and a modulator(23), the signal is fed to a speaker(27) after being amplified in a signal amplifier(26). Then, a sound is generated by forming transformation in the thin vibrating plates by the repulsive force between voice coils. Herein, the force generated between the voice coils on the vibrating plates is proportional to a gap for 1/d2. Therefore, when the gap becomes shorter, the force becomes larger. Moreover, the gap between the voice coils becomes shorter and the amplifying degree of the signal amplifier becomes weaker. As a result, a circuit driving the speaker is simplified while outputting a desired sound through the speaker when receiving a fine signal.
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