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:
Aug. 19, 1997
Filed:
Jul. 21, 1995
Peter Krause, Singapore, SG;
Apple Computer, Inc., Cupertino, CA (US);
Abstract
Dramatically lower power consumption of a video display to is achieved during standby mode. Using relatively simple sync-energy converting circuitry, the power supply can be switched on/off electronically, without the need to have the main power supply running and without an auxiliary supply. Power consumption of 0 W may thereby be achieved. In accordance with one embodiment of the invention, sync-signal energy is stored in a storage capacitor. During charging, the capacitor is decoupled from any load such that capacitor voltage will reach a peak voltage of the unloaded source signal. Charge and discharge cycles repeat continuously for so long as the power switch is turned off. This charging and discharging allows the display to be turned on using the power switch, even without the momentary presence of AC line voltage. A possible non-retriggable state is avoided using an RC time constant.