Speaker apparatus including a panel and vibration elements
US10524043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2018 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jan 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2217/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A speaker apparatus according to an embodiment includes a panel, one or more vibration elements, a drive unit, and a reflection part. The one or more vibration elements vibrate the panel. The drive unit applies a driving signal to the one or more vibration elements to form a striped vibration region on the panel. The driving signal is obtained by modulating a carrier wave of an ultrasonic band by a sound signal of an audible frequency band. The reflection part reflects at least one of first and second ultrasonic waves, which are generated from the vibration region and advancing in respective different directions, so as to bring an advancing direction of the first ultrasonic wave and that of the second ultrasonic wave close to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.