Electronic device with low battery warning
US8284302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2006 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Dec 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/634
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video camera includes a processor that is operable to obtain a capacity value of a battery by communicating over a communications line with a battery pack that contains the battery and which provides power to the video camera. The capacity value indicates a number of cell structures in the battery. The processor is also operable to set a correction value based on the capacity value, to correct a low power warning voltage value by subtracting the correction value from the low power warning voltage value, to generate a low power warning when a detected battery voltage is less than or equal to the corrected low power warning voltage value, and to generate a residual power indication when the detected battery voltage is greater than the corrected low power warning voltage value. A display is operable to display the low power warning or the residual power indication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.