Electronic apparatus having battery power source and control method for the electronic apparatus
US6888355B2 · kind B2 · utility
6Cited by
6References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2001 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Aug 15, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A voltage and internal resistance of a battery are measured in advance as its capacity decreases. In a flash memory of a device powered by the battery, voltages necessary to drive a motor, an EL display, and a bezel input unit are stored. By comparing the voltage of the battery with a resistor connected as a dummy load and the voltage read from the flash memory, it can be determined whether it is possible to drive the motor, the EL display, or the bezel input unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.