Project equipped with ultrasonic speaker, and method for displaying sound reproduction range in projector
US7909466B2 · kind B2 · utility
6Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | May 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S1/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector includes an ultrasonic speaker, a visual information generation unit that generates visual information relating to a sound reproduction range of the ultrasonic speaker, and an image projection unit that displays the visual information generated by the visual information generation unit on a screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.