(12) United States Patent ao) Patent No.: Us 7,075,744 B2
Cumpson et al. (45) Date of Patent: Jul. 11,2006
(54) METHOD AND APPARATUS FOR
MANAGING POWER CONSUMPTION OF A
(75) Inventors: Stephen Rodney Cumpson, Eindhoven
(NL); Nicolaas Lambert, Eindhoven
(73) Assignee: Koninklijke Philips Electronics N.V.,
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 10/526,872
(22) PCT Filed: Aug. 8, 2003
(86) PCT No.: PCT/IB03/03632
§ 371 (c)(1),
(2), (4) Date: Mar. 4, 2005
(87) PCT Pub. No.: WO2004/023279 PCT Pub. Date: Mar. 18, 2004
(65) Prior Publication Data
US 2005/0251696 Al Nov. 10, 2005
(30) Foreign Application Priority Data
Sep. 9, 2002 (EP) 02078655
(51) Int. CI.
G11B 19/02 (2006.01)
(52) U.S. CI 360/73.03; 360/69; 713/323
(58) Field of Classification Search None
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS 4,984,103 A 1/1991 Nigam 360/69
A method and apparatus for managing power consumption of consumer electronic devices that run on a battery or an accumulator, particularly portable applications such as mobile phones, laptops or MPEG players or recorders. They consist essentially of a host and a storage medium like a disk or means for receiving a storage medium like a disk drive that are coupled with an interface. Power management is very important because long battery life enhances user convenience. The invention determines whether it is more efficient either to leave the disk drive in the idle mode or to switch the drive to standby until the next data request appears. The disk drive is entered into the most efficient power mode. The time until the next request is determined by the host.
9 Claims, 6 Drawing Sheets