Adjustment of monitor resolution and pixel refreshment based on detected viewer distance

摘要

Techniques are disclosed for improving energy efficiency of displays, and in particular, displays capable of selective refresh. In an embodiment, the techniques include adjusting the effective resolution of a display based on the viewer's distance from the display. The effective resolution adjustment can be accomplished by, for example, grouping individual pixels or blurring the display buffer (or both pixel grouping and blurring) based on the viewer's distance from the display. Such an adjustment has the effect of creating enlarged pixels from a plurality of smaller pixels. In any such cases, each of the enlarged pixels (also called macro-pixels) can then be selectively refreshed based on changes from the previous frame. In addition, even if one of the macro-pixels has changed from the last frame, it also need not be refreshed if the viewer would not perceive that change given a subtle or otherwise unperceivable difference in intensity.

主权项

1. A method for refreshing a display, comprising:
identifying the distance of a viewer from a selectively refreshable display having an array of pixels; automatically adjusting an effective resolution of the display based on the distance using pixel grouping or blurring or both, to generate macro pixels based on a plurality of smaller pixels; and selectively refreshing the macro pixels changed by the adjusting, based on a comparison of intensity of the macro pixels with respect to intensity of adjacent macro pixels, in the same frame.