JPH0276459U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the schematic structure of a color cathode ray tube, Figs. 2, 3, and 4 are explanatory diagrams of the operation based on an embodiment of this invention, and Fig. 2 shows that the central electron beam is An explanatory diagram of how it was affected,
Figure 3 is a state diagram of static convergence in the state shown in Figure 2, Figure 4 is a diagram showing the case where the 6-pole magnet of this invention is applied, and Figure 5 is the action of a 6-pole magnetic field by the 6-pole magnet. Fig. 6 is a cross-sectional view showing the state of misconvergence due to coma aberration, Fig. 7 is a diagram showing the state of misconvergence that this invention attempts to solve, and Fig. 8 is a cross-sectional view showing the state of misconvergence due to coma aberration. Waveform diagram, Figure 9 shows the state of leakage magnetic field at the tip of the electron gun and horizontal deflection, Figure 10 shows the state of misconvergence when eddy current occurs in Figure 9, and Figure 11 shows this. FIG. 1 is a diagram showing an embodiment of the invention. In the figure, 21 indicates a six-pole magnet. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A convergence correction device comprising a six-pole magnet that generates a six-pole magnetic field between a static convergence adjustment magnet and a rear portion of a deflection yoke, and corrects misalignment of coma aberration in the horizontal direction.