JPH0391392A - Color deflection yoke device - Google Patents

Abstract

PURPOSE:To ensure the correction by compensating deficiency of a correction magnetic field with a balance correction magnetic field at the scanning of the left side of the screen and subtracting the excess with a balance correction magnetic field at the scanning of the right side of the screen. CONSTITUTION:A correction magnetic field is generated from correction coils 2, 3 at the left side scanning of a TV screen and a positive portion is applied to correction coils 8, 9 to generate a balance correction magnetic field in the same direction and a correction magnetic field is generated from the correction coils 2, 3 at the right side scanning of the TV screen and a negative portion is applied to the correction coils 8, 9 to generate a balance correction magnetic field in the opposite direction. Thus, the balance correction magnetic field is added to the correction magnetic field at the left side scanning and the balance correction magnetic field is subtracted from the correction magnetic field at the right side scanning.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the horizontal convergence X1. This invention relates to a color deflection yoke device equipped with a correction means.

[Conventional technology]

In recent years, cathode ray tube screens (hereinafter referred to as television screens) in color television receivers and color display devices have become increasingly popular.
There is a trend toward higher definition and larger size, and with this, the beam drive becomes wide-angle deflection, and in order to improve focus characteristics, there is a tendency to make the magnetic field distribution of the horizontal deflection coil more linear. However, if the magnetic field distribution of the horizontal deflection coil is made linear, color misalignment between blue B and red R on the , the need to perform this correction is desired.

Further, when designing a color deflection yoke in order to increase the definition of a screen, the convergence trilemma may be aggregated into a misconvergence Xl+, and in this case as well, it is necessary to correct this aggregated misconvergence xM.

This Miss Convergence X1. In order to perform the correction, it is necessary to use a cathode ray tube in which a blue B electron gun GG, a green G electron gun GG, and a red R electron gun GR are arranged in-line from left to right when viewed from the screen side. ,
A 4-pole correction coil connected to the neck of the color deflection yoke so that correction magnetic fields that cross the blue B beam and the red R beam are generated upside down is placed in the neck of the color deflection yoke. It is sufficient to flow synchronized parabolic currents, but at present, few collar deflection yoke devices equipped with this parabolic current generation circuit have been put to practical use.

[Problem to be solved by the invention]

Claims (1)

[Claims] A convergence correction coil that is connected to the horizontal deflection coil and receives a parabolic correction current to generate a convergence correction magnetic field that alternately crosses the blue beam and the red beam in the vertical direction; A diode is connected in parallel with the coil and turns on when the horizontal deflection pulse becomes a forward voltage, creating a parabolic correction current.The cathode ray tube screen receives the sawtooth wave horizontal deflection current. In the scanning section on the left side of the screen, a balance correction magnetic field is generated in the same direction as the convergence correction magnetic field, and in the scanning section on the right side of the screen, a balance correction magnetic field is generated in the opposite direction to the convergence correction magnetic field. A color deflection yoke device having a balance correction coil for correcting unbalance of the color deflection yoke.