Patent ID: 6091454
Filing Date: 2000-07-18
Classification: H04N

Abstract:
In a television system including a cathode ray tube (CRT) display unit, wherein said CRT display unit includes an anode, a cathode, a deflection coil, a display screen, and an electron source, wherein a plurality of images are displayed on said display screen by bombarding electrons emitted by said electron source, wherein said anode and cathode drive said electrons from said electron source to said display screen, wherein said deflection coil deflects the electrons moving from said electron source to said display screen and wherein the amount of deflection is determined by a voltage level applied to said deflection coils using a voltage source, wherein any adjacent horizontal blocks with sharp contrast in said plurality of images cause said voltage level to change and thereby cause distortions in said images displayed on said display screen, a method of correcting said distortions, said method comprising the steps of:(a) examining a plurality of digital pixel data elements representing said plurality of images to determine the extent of contrast between adjacent horizontal blocks in said plurality of images; and(b) generating a correction signal to counter said distortions which may be otherwise caused such that said plurality of images are generated without any distortions.