Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2007-01-04
2011-10-18
Wang, Albert (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C455S343100, C455S574000
Reexamination Certificate
active
08041968
ABSTRACT:
Systems and methods for efficiently managing power consumption in portable electronic devices are provided. In one embodiment, power management circuitry may operate the device in a low power mode (e.g., a HIBERNATION mode), but enables the device to quickly become fully operational in response to a power-ON event, despite having been in that low power mode. This may be accomplished by powering a processor engaging memory (e.g., SDRAM) while other circuitry are powered OFF. In another embodiment, the display may be driven by an application portion when operating in an ON mode, but may be driven by a carrier portion when the application is operating in a low power mode. In another embodiment, various discrete circuitry portions are selectively turned ON and OFF, depending, for example, on whether a particular discrete circuitry portion is idle or its processing functionality is not needed.
REFERENCES:
patent: 6909434 (2005-06-01), Takala et al.
patent: 7640041 (2009-12-01), Ragan
patent: 2005/0068254 (2005-03-01), Booth
patent: 2007/0123314 (2007-05-01), Ragan
Apple Inc.
Kellogg David C.
Wang Albert
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