Patent ID: 7580033

Claim:
A system for reducing power consumed by a liquid crystal display device, the system comprising: a monitoring apparatus designed or configured to monitor user activity in a display area for the liquid crystal display device and to separate the display area into an active portion based on user activity in the active portion and an inactive portion that is outside the active portion; a power conservation control designed or configured to receive user activity information provided by the monitoring apparatus, to determine an alteration for the video information in the inactive portion such that luminance for the video information in the inactive portion decreases, reduce backlight luminance in the inactive portion for a backlight included in the liquid crystal display device such that the display device will consume less power when displaying the altered video information along with the reduced backlight luminance, and to output a signal indicative of the alteration; a video adaptor designed or configured to receive the signal from the power conservation control, alter the video information in the inactive portion based on the signal, and output the altered video information; and at least one display buffer designed or configured to receive the altered video information and output, to the display device, a) active portion video information for display in the active portion of the display area, and b) the altered video information for display in the inactive portion, which is for display while the active portion video information is displayed and while the backlight luminance is reduced in the inactive portion.