Thin film circuit substrate, piezoelectric speaker device, display device, and sound-generating display device

A piezoelectric speaker device, comprising:

• (a) a thin film circuit substrate having an insulative substrate and a thin film layer provided on the insulative substrate, the thin film layer having at least part of a circuit section provided thereon, the thin film circuit substrate including:
• an antisurge element, provided on the insulative substrate and on a wiring between the circuit section and an input terminal section or an output terminal section of the circuit section, for removing excess charges from the wiring when a voltage exceeding a predetermined range is applied to the wiring;
• and
• (b) a voice output section for outputting a voice according to an audio signal, the voice output section having a vibration section and an excitation source section realized by a piezoelectric element for driving the vibration section according to a drive signal
• the circuit section having a voice-output-section driving section for driving said voice output section according to an audio signal.

A display device, comprising:

• (a) a thin film circuit substrate having an insulative substrate and a thin film layer provided on the insulative substrate, the thin film layer having at least part of a circuit section provided thereon, the thin film circuit substrate including:
• an antisurge element, provided on the insulative substrate and on a wiring between the circuit section and an input terminal section or an output terminal section of the circuit section, for removing excess charges from the wiring when a voltage exceeding a predetermined range is applied to the wiring;
• and
• (b) a display section for displaying an image according to a video signal,
• the circuit section having a display-section driving section for driving said display section according to a video signal.

A sound-generating display device, comprising:

• (a) a thin film circuit substrate having an insulative substrate and a thin film layer provided on the insulative substrate, the thin film layer having at least part of a circuit section provided thereon, the thin film circuit substrate including:
• an antisurge element, provided on the insulative substrate and on a wiring between the circuit section and an input terminal section or an output terminal section of the circuit section, for removing excess charges from the wiring when a voltage exceeding a predetermined range is applied to the wiring;
• (b) a voice output section for outputting a voice according to an audio signal, the voice output section having a vibration section and an excitation source section realized by a piezoelectric element for driving the vibration section according to a drive signal;
• and
• (c) a display section, provided on said thin film circuit substrate, for displaying an image according to a video signal,
• said circuit section having (i) a voice-output-section driving section for driving said voice output section according to an audio signal and (ii) a display-section driving section for driving said display section according to a video signal.