Abstract: An improved system and method for selectively applying LCD Response Time Compensation (LRTC) to areas of an LCD panel containing video motion. Motion vectors contained within macroblocks in a compressed video stream are utilized to qualify whether individual pixels in a video frame are a candidate for LRTC. In various embodiments of the invention, computationally expensive LRTC can be selectively applied, pixel-by-pixel, which can result in portable information system power savings by reducing the number of computational cycles and the amount of graphics controller power overhead.

Abstract: The present invention provides a method and apparatus for automatically determining whether display is attached to a display interface port. In an embodiment of the invention a display can be automatically detected by determining whether an EDID is present and, therefore, whether a display is present at the video interface port. Detection logic is operable to generate a DDC polling signal for use by the EDID circuitry in a display and to receive a DDC data signal generated by the EDID circuitry in response to the polling signal. The DDC data signal generated by the EDID circuitry in the display comprises a header portion and a data portion. The detection logic is operable to examine the header portion of the DDC data signal to determine whether a display is connected to the display interface port.

Abstract: The present invention provides a method and apparatus for automatically detecting whether an external monitor is connected to a video port of an information handling system. In various embodiments of the invention, detection of the display is accomplished by periodic polling to detect the presence of an Extended Display Identification Data (EDID) signal as an indication of whether a display has been plugged in or removed. In embodiments of the invention, hardware polling is implemented to provide the interrupt-driven mechanism, thereby relieving software of the performance degradation associated with polling the video port at very short time intervals.