Ultrasonic liquid-crystal display

An ultrasonic liquid-crystal display comprising:

• at least two ultrasonic subdisplays, which form a stacked body, each of said at least two ultrasonic subdisplays consisting of
• a nonpiezoelectric bottom-plate having a transparency,
• a piezoelectric substrate on a first surface-part of an upper end-surface of said nonpiezoelectric bottom-plate,
• at least one dispersive interdigital transducer on said piezoelectric substrate,
• a nonpiezoelectric upper-plate having a transparency,
• a first conducting electrode, with which a second surface-part of said upper end-surface of said nonpiezoelectric bottom-plate is covered,
• a second conducting electrode, with which a lower end-surface of said nonpiezoelectric upper-plate is covered, and
• a liquid crystal between said first- and second conducting electrodes,
• said at least one dispersive interdigital transducer receiving a first electric signal, exciting an FM chirp-SAW in said piezoelectric substrate, transmitting said FM chirp-SAW to said liquid crystal, and causing said liquid crystal cloudy,
• said first- and second conducting electrodes receiving a second electric signal, applying electric field to said liquid crystal, and making said liquid crystal cloudless.

An ultrasonic liquid-crystal display comprising:

• a piezoelectric transparent substrate;
• at least one dispersive interdigital transducer on a first surface-part of an upper end-surface of said piezoelectric transparent substrate;
• a transparent nonpiezoelectric plate;
• a first conducting electrode, with which a second surface-part of said upper end-surface of said piezoelectric transparent substrate is covered;
• a second conducting electrode, with which a lower end-surface of said transparent nonpiezoelectric plate is covered;
• and
• a liquid crystal between said first- and second conducting electrodes,
• said at least one dispersive interdigital transducer receiving a first electric signal, exciting an FM chirp-SAW on said upper end-surface of said piezoelectric transparent substrate, transmitting said FM chirp-SAW to said liquid crystal, and causing said liquid crystal cloudy,
• said first- and second conducting electrodes receiving a second electric signal, applying electric field to said liquid crystal, and making said liquid crystal cloudless.