Sound production device, display system, and sound production method
US10986459B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 21, 2019 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Aug 21, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound production device, a display system, and a sound production method for a sound production device. The sound production device includes ultrasonic transducers, a sounding control unit, and a motion unit. The ultrasonic transducers can constitute at least one sounding unit, each of the sounding units includes two ultrasonic transducers, and one ultrasonic transducer in each sounding unit emits a first ultrasonic wave, and the other ultrasonic transducer emits a second ultrasonic wave. The sounding control unit is configured to determine a target direction and output a direction command to the motion unit according to the target direction. The motion unit is configured to adjust a sounding direction of each ultrasonic transducer according to the direction command, such that two ultrasonic transducers in each sounding unit emit sound toward the target direction to generate a difference frequency sound wave within an audible frequency range in a target area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.