Patent ID: 6518985
Filing Date: 2003-02-11
Classification: G09G,H04N

Abstract:
A display unit for generating a display of a plurality of overlapping windows, each window having a priority for display and defined by pixels each having a color and luminance value, comprising:an area detector and prioritizer responsive to a current display coordinate for determining a highest priority window having a pixel value for a current display coordinate; and generating an active window signal identifying said highest priority window, a plurality of buffers, each buffer storing pixel values for one of said plurality of overlapping windows, at least a first and a second window stored in said buffers having a different number of pixel values, each buffer delivering one or more pixel value signals on a buffer output, the output signals from a buffer including a pixel value for the window stored in the buffer, for a current display coordinate, a multiplexer receiving the pixel value signals from said buffers and being responsive to said active window signal for delivering a multiplexer output taken from the output of the buffer storing the window identified by said active window signal.