JPH02103983U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 a, b and Fig. 2 a, b show an embodiment of this invention, a color CRT with external magnetic countermeasures.
Fig. 3 is an explanatory diagram of changing the connection of the degaussing coil when implementing this invention, Fig. 4 a, b is an example of the current used in Fig. 1 a, b and Fig. 2 a, b. An explanatory diagram showing the conventional color C, Fig. 5 a and b
A schematic sectional view showing one embodiment of external magnetic countermeasures for RT, FIG. 6 is an exploded perspective view showing another embodiment of external magnetic countermeasures for a conventional color CRT, and FIG. 7 shows the assembled state of FIG. 6. It is a schematic sectional view. In the figure, 1 is a color CRT, 4 is a degaussing coil, 9 is a gradually decreasing alternating current, and 10 is a value current whose polarity can be switched and whose current value can be adjusted. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A color cathode ray tube has at least two paired coils around the panel or funnel, and the coils are connected so that when the power is turned on, the direction of the magnetic lines of force generated by the paired coils is approximately parallel to the shadow mask. A gradually decreasing alternating current is passed through the coil, and after the gradually decreasing alternating current attenuates, the direction of the magnetic lines of force generated by the paired coils is changed to be almost perpendicular to the shadow mask, and the polarity can be switched and the current value can be adjusted. A color video receiver characterized by flowing direct current.