Communication apparatus for controlling switching between a normal mode and a power saving mode
US5933581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1998 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Feb 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A communication apparatus includes an ink jet type printer capable of shifting from a normal operation mode to a low power consumption mode in a stand-by state by rendering the printer to a sleep mode. A recovery level of the printer at the time of wakeup from the sleep mode is based on an elapsed time that is counted from a previous recovery execution time, and a recovery operation is based on the determined recovery level. In another aspect, in the power saving mode, a printer processing unit is not enabled, but then is enabled in reply to a change from the power saving mode to the normal mode, and a communication processing unit transfers control data to the printer processing unit in response to the change from the power saving mode to the normal mode to be used for controlling the printer unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.