发明名称 |
CIRCUITRY FOR CORRECTING GEOMETRICAL DISTORTIONS |
摘要 |
A circuit for correcting geometrical distortions in reproducing signals on a screen of a cathode-ray tube in a display monitor. A line-frequency correction current having line deflection frequency is coupled into the vertical deflection unit which serves for deflecting vertically electron beams in the cathode-ray tube. A circuit which provides horizontal deflection current is connected to the primary winding of a differential transformer. The differential transformer has a secondary winding connected to the circuit which supplies vertical deflection current. The distortion is reflected by a cathode-ray tube which has a substantially flat picture screen, in which horizontal lines to be displayed form in angle with a horizontal reference grid.
|
申请公布号 |
US5077501(A) |
申请公布日期 |
1991.12.31 |
申请号 |
US19880235652 |
申请日期 |
1988.08.24 |
申请人 |
DEUTSCHE THOMSON-BRANDT GMBH |
发明人 |
HARTMANN, UWE;DIETERLE, FRANZ;OHNEMUS, FRITZ |
分类号 |
H01J29/76;H04N3/23;H04N3/237 |
主分类号 |
H01J29/76 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|