Patent ID: 9667949
Date: 2017-05-30
CPC Classifications: H04N,H04R

Claim:
1. A display apparatus for visual and audio multiplexed display, the display apparatus comprising: a directive display unit configured to display on a screen a plurality of pieces of visual information toward a corresponding plurality of locations, wherein each of the plurality of pieces of visual information is output toward a specific location of the plurality of locations; a directive speaker unit configured to transmit a plurality of pieces of audio information toward the plurality of locations, wherein each of the plurality of pieces of audio information is output toward a specific location of the plurality of locations; and a central control unit configured to control the directive display unit and the directive speaker unit, wherein the directive speaker unit comprises: at least one sound wave generator configured to generate a wave, wherein the wave is at least one of a sound wave and an ultrasound wave carrying the plurality of pieces of audio information, the at least one sound wave generator comprising a first sound wave generator that generates a first wave corresponding to a first piece of audio information, and a second sound wave generator that generates a second wave corresponding to a second piece of audio information; at least one acoustic meta-structure body having directivity and configured to at least one of collimate the wave generated by the at least one sound wave generator toward one direction, diverge the wave generated by the sound wave generator by a radiation angle within about 30°, and converge the wave generated by the sound wave generator into one point, and the at least one acoustic meta-structure body comprises a first acoustic meta-structure body that transmits the first wave generated by the first sound wave generator toward a first direction corresponding to the first piece of audio information, and a second acoustic meta-structure body that transmits the second wave generated by the second sound wave generator toward a second direction corresponding to the second piece of audio information.