Patent ID: 6058221
Filing Date: 2000-05-02
Classification: H01J,H04N

Abstract:
A method of measuring electron beam profile in an electronic display device comprising the steps of:displaying an array of video dots on a display screen of said electronic display device, each of said video dots being comprised of a group of phosphor dots illuminated by an electron beam;taking an image of a plurality of groups of illuminated phosphor dots forming video dots within a field of view;determining average horizontal and vertical distances of the video dots within said field of view; andsuperimposing each of said groups of illuminated phosphor dots forming the video dots in said field of view that are captured in said image based on the average horizontal and vertical distances of the video dots in said field of view generally to average and fill in discontinuities between phosphor dots in said groups and thereby generate an overlay image of said electron beam.