System and Method for Pulse Width Modulating a Scrolling Color Display

摘要

A method of organizing and ordering pulse width modulation image data is disclosed, so that it may be displayed on the pixels of a scrolling color display. The method includes a method of formatting received image data into a different form suitable for driving a pulse width modulated display and a method of distributing image data across a series of different image modulation segments to minimize flicker and gray scale errors. The method includes means for reducing lateral field effects between adjacent pixels in different data states.

主权项

1. A method for pulse width modulating a display, wherein said display comprises at least two display sections, each comprising a plurality of rows, wherein said display responds to changes in image data on a pixel by changing the modulation of the light incident on said pixel responsive to said image data, the method comprising:
applying a pattern of virtual write pointers operative to direct image data to the rows of a display, said pattern configured such that the first write pointer is operative to direct image data to a first row in a first display section; wherein said pattern of virtual write pointers comprises a plurality of write pointer groups, wherein a first group of virtual write pointers comprised of the first write pointer in each of said at least two display sections direct image data to a like number of rows, one in each display section, and wherein a second group of virtual write pointers wherein a second group of write pointers comprised of the second write pointer in each of said at least two display sections direct image data to a like number of rows, one in each display section, and wherein a third group of virtual write pointers comprised of the third write pointer in each of said at least two display sections direct image data to a like number of rows, one in each display section, and wherein a subsequent group of virtual write pointer comprising the next subsequent write pointer in each of said at least two display sections direct image data to a like number of rows, one in each display section, until all write pointers for all display sections have directed image data to their respective rows; wherein each said first row in a display section is separated from each said second row in the same display section by a first number of rows comprising at least one row, and wherein said second row in the same display section is separated from said third row in the same display section by a second number of rows different from said first number of rows and by at least one row; applying said pattern of virtual write pointers to said at least two display sections with at least one row offset from said earlier first row in said first display section, and then repeating the previously described row write actions with said at least one row offset, said row write offset being the same in all instances; and continuing until all rows have been written by all write pointers.