Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
2005-09-05
2011-12-06
Cao, Chun (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
C713S320000, C713S323000, C315S247000, C315S307000
Reexamination Certificate
active
08074085
ABSTRACT:
A system and method for controlling power supply of a power source to at least one power consumer to a desired value in the range of from 0 and 100% in which the operating time of the power consumer is divided up into periods and the power output by the power source is switched on within one period only during the duty cycle which is the portion of the period length that corresponds to the desired value. Resolution provided by the present system and method is improved over known techniques for the static division of the period into equally long periods, especially in the control of light modules having low intensities. The present system and method includes the feature in which the period length is divided up into a number of blocks, every block having at least one switch segment in which the switching state can be modified, and at least one static segment in which the switching state cannot be modified.
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White paper of Artistic Licence (UK) Ltd., Great Britain, dated May 2002, entitled “An overview of the electronic drive techniques for intensity control and colour mixing of low voltage light sources such as LEDs and LEPs”, (see www.artisticlicense.com/app%20notes/appnote011.pdf).
Brown Michael J
Cao Chun
Muirhead and Saturnelli LLC
LandOfFree
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