System for gracefully aging inactive areas of a video display

摘要

When a video display system displays an image having an aspect ratio that differs from the aspect ratio of the system's display monitor, the image spans only an "active" portion of the available display area on the monitor. The display system sets the luminance and/or chrominance of pixels in the inactive areas of the monitor to match the average luminance and/or chrominance of a selected group of pixels forming the image in the active area. This helps prevent ghosting by aging the phosphors or other material forming the pixels in the active and inactive areas at the same rate.