Video camera with low battery warning
US7102684B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/634
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A warning is displayed for a constant time prior to end of a battery with respect to battery packs having various cell structures. A microcomputer 14 in the side of a video camera recorder body 10 obtains a reference voltage value from a voltage correction value decided based on information concerning a capacity of a cell in a battery pack obtained from a battery pack 20, and an end voltage value at which use of the battery is ended. A display section 15 is controlled by a result of comparison between the voltage value of the battery pack 20 and the reference voltage value, and a warning is displayed when the voltage value of the battery pack becomes equal to or lower than the reference voltage value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.