| 摘要 |
The present invention relates to a motor power controller for a disk drive. Further on, the present invention relates to a disk drive comprising a motor power controller and to a method for controlling the motor power of a disk drive. Portable computers like laptop computers or portable audio/video systems like DVD players or other portable devices operate usually on battery power. An important factor in determining battery life is the disk drive. For that, in order to maximize battery life-time, the efficiency of the disk drive has to be improved. The present invention provides a motor power controller for a disk drive, especially for a disk drive of a portable device, comprising means defining at least two operation states of said disk drive, a first operation state running a motor of said disk drive continuously, and a second operation state spinning said motor up at the beginning of each data operation and spinning said motor down at the end of each data operation. The motor power controller comprises means transitioning said disk drive from said first operation state to said second operation state when a time interval being longer than a predetermined period of time without any data requests is determined. Further on, the motor power controller comprises means transitioning said disk drive from said second operation state to said first operation state when a predetermined number of time intervals between consecutive data requests are determined all or each of them being smaller than said predetermined period of time.
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