发明授权
- 专利标题： GULLWING DISTORTION CORRECTED DEFLECTION CIRCUITRY FOR A SQUARE-PLANAR PICTURE TUBE
- 专利标题（中）： 正方形平面图管的纠偏纠正电路
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申请号： EP85903466.2申请日： 1985-06-10
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公开(公告)号： EP0185082B1公开(公告)日： 1990-08-16
- 发明人: McDONALD, James, Alexander , WAYBRIGHT, George, Cleveland , WILLIS, Donald, Henry , SUTHERLAND II, Hugh, Ferrar , LUZ, David, Warren , HAFERL, Peter, Eduard
- 申请人： RCA LICENSING CORPORATION
- 申请人地址： 2 Independence Way Princeton New Jersey 08540 US
- 专利权人： RCA LICENSING CORPORATION
- 当前专利权人： RCA LICENSING CORPORATION
- 当前专利权人地址： 2 Independence Way Princeton New Jersey 08540 US
- 代理机构： Smith, Thomas Ian Macdonald
- 优先权： GB8414946 19840612; GB8414947 19840612; US733661 19850510
- 国际公布： WO8600170 19860103
- 主分类号： H04N3/233
- IPC分类号： H04N3/233 ; H01J29/56
摘要：
Line (20) and field (40) deflection circuits generate line and field deflection currents in respective line (LH) and field (Lv) deflection windings to scan a raster on the phosphor screen of a square-planar picture tube having an aspherical faceplate. The asphericity of the faceplate (30) subjects the scanned raster to gullwing distortion. A gullwing distortion correction circuit (70) is responsive to signals repeating at line and field rates, respectively, for modulating the field deflection current during a line deflection period within the field deflection trace interval in a manner that corrects gullwing distortion of a corresponding raster scan line.
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