| 摘要 |
A method and system for providing two-dimensional convergence correction for a color cathode ray tube (CRT) is disclosed. The CRT displays an input video signal comprising a stream of video scan lines which include red, green and blue color signals that are to be displayed on corresponding scan lines and subpixel locations of a display screen. The method and system include storing a plurality of scan lines from the video signal into a buffer. For a particular red, green and blue color signal, horizontal and vertical distortion of the red and blue subpixels in relation to a position of the green subpixel on the display screen are measured. Then, at least one math function is generated that mathematically represents the distortions. Finally, the math functions are applied to control circuitry to control timing of red and blue subpixels read from the frame buffer so that output of the red and blue subpixels are coincident with output of the green subpixel on the display screen.
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