| 摘要 |
PURPOSE:To obtain the pictures in a high grade convergence by providing a forward coil to the upper and lower subcores and a backward coil to the right and left subcores and by adjusting a ratio of ampere turns of them. CONSTITUTION:An auxiliary coil 17 is composed of the coils 17a, 17b disposed at the areas including the center line 9 in the vertical direction and the coils 17c, 17d disposed at the areas including the center line 22 in the horizontal direction. The auxiliary coils 17a, 17b allow the current to flow in the same direction as the vertical deflection coil 3, while the coils 17c, 17d allow the current to flow in the opposite direction to the vertical deflection coil 3. These auxiliary coils are provided to a subcore 21. The subcores 21a, 21b having the forward coils and the main core 4 are integrally assembled and then the vertical deflection coil 3 is wound around them. The trimer can be variably adjusted by changing a ratio of the number of turns of forward and backward coils of auxiliary coil 17 and the pictures having no misconvergence can be obtained. |
