A video sub-system features reduced power consumption by periodically disabling the video controller clocks used for transferring pixel data to a screen. The video clocks are pulsed only when pixel data is being transferred to the screen, during the time that a horizontal line of pixels is being scanned...http://www.google.fr/patents/US5615376?utm_source=gb-gplus-shareBrevet US5615376 - Clock management for power reduction in a video display sub-system
Clock management for power reduction in a video display sub-system