Polarity inverting circuit

A polarity inverting circuit for supplying one of first and second potentials to first and second signal lines in accordance with a polarity inversion control signal, the circuit comprising:

• a first potential source and a second potential source;
• first output voltage transmission means (RB-SW1) connected to said first potential source and to said first signal line for linearly changing an output voltage from the first potential to the second potential;
• second output voltage transmission means (TB-SW 3) connected to said second signal line for linearly changing an output voltage from the second potential to the first potential when the output voltage from said first output voltage transmission means reaches the second potential;
• first connection means (RG-SW 2) connected to said first signal line and operated for connecting said first signal line to said second potential source when the output voltage from said first output voltage transmission means substantially reaches the second potential;
• second connection means (TG-SW 4) connected to said second signal line and operated for disconnecting said second signal line from said second potential source when said first connection means is connected to said second potential source;
• first and second polarity switching time changing means, (6,7) connected to said first and second output voltage transmission means, respectively, for changing corresponding rates of changes in the respective output voltages;
• and
• control means (5) connected to said first and second polarity switching time changing means and to said first and second connection means, said control means receiving a polarity inversion control signal and controlling operations of said first and second output voltage transmission means and of said first and second connection means.