Apple Inc.

Steven Ichung Kuo

Michael Jason Giles

Paul J Costa

David R Cox

Steven J Sfarzo

Nicholas W Ruhter

Fiyinfolu O Adewale

Bharat K Patel

Mark K Sin

Asif Iqbal

Paul S Michelsen

Adrian E Sun

Chad O Simpson

Erik A Gutfeldt

Steve Xing-Fu Zhou

Kim Phuong T Truong

Lee M Schaff

Derrick C Lau

The embodiments discussed herein relate to systems, methods, and apparatus for controlling power consumption of a computing device in a standby or sleep mode. During the standby or sleep mode an external device can be plugged into the computing device. The external device can be provided power from a standby power supply until a determination is made as to whether a main power supply is operating. The determination can be based on comparing the output of the main power supply to an output of the standby power supply. If the main power supply is operating, a switch in the computing device can close to allow the main power supply to provide power to the external device. Moreover, in some embodiments, the switch can close based exclusively on a current demand of the external device from the standby power supply.

Reduced energy consumption in a computer system through software and hardware coordinated control of multiple power supplies

A method and apparatus for recovering from a low power state in a computing system is disclosed. In one embodiment of the method, the computing system enters the low power state from a standard power state after an activity detector indicates a user controlled peripheral device connected to the computer system has been inactive for a period of time. To enter the low power state, the method disconnects the user controlled peripheral device from a host controller, while continuing to supply power to the user controlled peripheral device and shutting off power to the host controller. The method returns the computer system to the standard power state when the activity detector indicates the user controlled peripheral device has become active. To return to the standard power state, power is restored to the host controller and the user controlled peripheral device is reconnected to the host controller.

Method and apparatus for entry into low power state

Method and apparatus for recovery from low power state

Growing community of inventors

Sunnyvale, CA, United States of America

Steven Ichung Kuo