Touch panel, electrooptical device, and electronic apparatus

A touch panel comprising:

• a first touch panel substrate;
• a second touch panel substrate disposed opposite the first touch panel substrate;
• at least one surface acoustic wave generator that generates a surface acoustic wave propagating across a surface of the second touch panel substrate facing the first touch panel substrate in a predetermined direction;
• at least one surface acoustic wave sensor that senses the surface acoustic wave generated by the surface acoustic wave generator;
• a position detector that detects a position where the first touch panel substrate is pressed according to the waveform of the surface acoustic wave sensed by the surface acoustic wave sensor;
• and
• spacers disposed between the first and second touch panel substrates in a region where the surface acoustic wave generated by the surface acoustic wave generator does not propagate on the surface of the second touch panel substrate facing the first touch panel substrate.

An electrooptical device comprising:

• a first touch panel substrate;
• a second touch panel substrate disposed opposite the first touch panel substrate;
• a display panel disposed opposite a surface of the second touch panel substrate facing away from the first touch panel substrate with a predetermined gap defined therebetween;
• at least one surface acoustic wave generator that generates a surface acoustic wave propagating across the surface of the second touch panel substrate facing away from the first touch panel substrate in a predetermined direction;
• at least one surface acoustic wave sensor that senses the surface acoustic wave generated by the surface acoustic wave generator;
• a position detector that detects a position where the first touch panel substrate is pressed according to the waveform of the surface acoustic wave sensed by the surface acoustic wave sensor;
• and
• spacers disposed between the second touch panel substrate and the display panel along a path where the surface acoustic wave propagates from the surface acoustic wave generator to the surface acoustic wave sensor.