| 摘要 |
PROBLEM TO BE SOLVED: To suppress an alternating electric field radiated from the front surface of a cathode-ray tube by a simple constitution, by applying a cancel pulse inverting polarity of the alternating electric field radiated from the cathode-ray tube to a picture plane tilt correction coil. SOLUTION: An induction coil 5 is wound to a secondary side of a horizontal deflection choke transformer 10, a horizontal component cancel pulse 9 inverting polarity of a horizontal blanking pulse 8, generated in a horizontal deflecting circuit 4, is generated. The generated horizontal component cancel pulse 9 is applied to a picture plane tilt correction coil 3 arranged in the vicinity of a cathode ray tube 1. By this constitution, an alternating electric field radiated from the front surface of the cathode-ray tube 1 can be relatively easily negated, field intensity can be sufficiently suppressed. Further, a means adjusting the amplitude and the phase of the generated horizontal component cancel pulse 9 is provided, the pulse, suitably adjusting its amplitude and phase, is preferable supplied to the picture plane tilt correction coil 3. |
