Patent ID: 6549247
Filing Date: 2003-04-15
Classification: G02F

Abstract:
An ultrasonic liquid-crystal display comprising: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.