Portable electronic device and control method for controlling the portable electronic device
US6424600B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To provide a portable electronic device which is easily shifted into a power save mode at the discretion of an operator, such as a user, and optimally reduces power consumption in accordance with the current use of the device. An operator can force an electronic device into a power save mode at the operator's discretion by manipulating a control. Electrical energy stored is thus reliably saved in accordance with the usage by the operator, and unnecessary power consumption is efficiently reduced, even more than in a method in which a device automatically stops the time display and is shifted into a power save mode in accordance with the presence or absence of power generation. Setting a time limit within which the operational state of the control needs to be complete, the operator is prevented from erroneously shifting into the power save mode, and the ease of use of the time measurement device is still assured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.