Battery powered computer system wherein a power supply is select

Details Battery powered computer system wherein a power supply is select Battery powered computer system wherein a power supply is select

1988-03-24

1990-03-06

Clark, David L.

Boots, shoes, and leggings

364900, 3649487, 365229, G06F 100

Patent

active

049071831

ABSTRACT:
A method and related apparatus for extending the battery life in a battery powered computer system having a high power consumption peripheral device, such as a hard disk. The energy state of the power supply battery is determined by a voltage detector. When the battery voltage drops to a level below which continued operation of the computer system will become unreliable or impossible, battery life is extended by de-energizing any high power consumption peripheral devices such as the hard disk, thereby providing an operator with additional time to store data or secure a backup power source. To prevent loss of data as it is being stored on a hard disk, one embodiment of the invention cuts off power to the hard disk only when the hard disk is operating in a standby mode, thereby improving data storage reliability.

REFERENCES:
patent: 3755806 (1973-08-01), Bunting
patent: 4461003 (1984-07-01), Tamaki
patent: 4667289 (1987-05-01), Yoshida et al.
patent: 4674031 (1987-06-01), Siska, Jr.
patent: 4747041 (1988-05-01), Engel et al.

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