Management of power states in a portable computing device
US7747886B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Dec 12, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention provide a method and apparatus for managing power states in a personal computing device, while maintaining a perception by the user of “instant on” functionality. In various embodiments of the invention, the power states are presented to the user as a simple on/off option and the power management protocol is not visible within the user interface of the personal computing device thereby providing the user with the impression that the system is operating with a simple binary on/off protocol. In one embodiment of the invention, the personal computing device is operable to transition between a set of power states that include: 1) an “on” power state wherein the display is on and the customer can use all input devices; 2) a “ready” state wherein the display is turned off, but some modules, such as a radio module, remain on; 3) an “off” state wherein the personal computing device turns off after a slight pause, but a “booted kernel” is held in SDRAM; and 4) a “dead” state wherein none of the modules of the personal computing device are powered and the device must be cold booted to restart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.