The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2004
Filed:
Aug. 31, 2000
Naoyuki Inoue, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A power control unit for a battery-driven data processing system, in which the power consumption of the whole system is prevented from increasing by controlling the clock frequency of a CPU and the brightness of a display unit, is disclosed. When the clock frequency of the CPU is increased, the brightness of the display unit connected to the data processing system having the CPU built therein is decreased while, when the clock frequency of the CPU is reduced, the brightness of the display unit is increased thereby to maintain a substantially constant power consumption. In the case where the brightness of the display unit connected to the data processing system is increased, on the other hand, the clock frequency of the CPU is reduced, while in the case where the brightness of the display unit is reduced, the clock frequency of the CPU is increased thereby to maintain a substantially constant power consumption. Further, the clock frequency of the CPU is reduced at the time of spinup of the drive motor for a disk-shaped recording medium, and at the end of the spinup operation, the clock frequency of the CPU can be restored to the original state.