Patent ID: 6084490
Filing Date: 2000-07-04
Classification: H01J

Abstract:
A video display deflection apparatus, comprising:a first deflection coil for producing a first deflection field to scan an electron beam along a first axis of a display screen of a cathode ray tube;a saddle shaped, second deflection coil for producing a second deflection field to scan said electron beam along a second axis of said display screen of said cathode ray tube, said second deflection coil including a plurality of winding turns forming a pair of side portions, a front end turn portion, close to said screen, and a rear end turn portion, close to an electron gun of said tube, said side portions forming a winding window free of conductor wires between said side portions, having a length dimension defined by a distance between said front end turn portion and said rear end turn portion, at least one of said side portions having a first winding space for correcting a trapezium differential beam landing error, said first winding space occupying an angular range selected between 30 and 45 degrees and having a length dimension greater than one half said length dimension of said window,said angular range being measured in a plane that includes said first and second axes; anda magnetically permeable core for cooperating with said first and second deflection coils to form a deflection yoke.