ACPI sleep control
US6266776A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1998 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Nov 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When the state of an internal battery or an external power supply changes, the change is detected by an embedded controller. The OS is informed of this change using a power management event signal POWER_PME and an SCI interrupt. In accordance with the change in power supply state by the internal battery or the external power supply, the current system state changes to another system state. Accordingly, the system state can dynamically change between sleep states in accordance with a change in power supply state of the computer. Trade-off between shortening of the time interval from a sleep state to system activation, and power saving during sleep can be optimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.