JPS6116448A - Deflection york - Google Patents

Abstract

PURPOSE:To enable misconvergence to be easily corrected independently of a convergence circuit by installing at least one auxiliary coil for supplying a correction current to a convergence corrector in a magnetic field formed by a deflection york and connecting the auxiliary coil to the convergence corrector. CONSTITUTION:Auxiliary coils 1 are installed in the window of a horizontal deflection york. They are connected to a convergence circuit which is installed on the back end of a deflection york separator and consists of a full-wave rectifying circuit 3, a variable resistance 4 and convergence coils 2. A voltage of horizontal periodicity is induced in the auxiliary coils 1 by a horizontal magnetic field and the thus induced voltage is supplied as a parabola-correcting current of horizontal periodicity through the full-wave rectifying circuit 3 and the variable resistance 4. The above parabola-correcting current produces a correction magnetic field which corrects X-axis longitudinal lateral-shift misconvergence. Consequently, misconvergence can be easily corrected by the correction current produced on the side of a cathode-ray tube.

Description

BACKGROUND OF THE INVENTION The present invention relates to a deflection yoke apparatus for a cathode ray tube having an in-line electron gun.

With the recent development of new media, the requirements for reducing residual misconvergence in deflection yoke devices used in color cathode ray tube display devices have become increasingly strict, and various countermeasures have been proposed. Conventionally, in a deflection yoke device equipped with a convergence device as shown in FIG.
Convergence devices were placed on both sides of the in-line electron gun, and a parabola correction current with a horizontal period was supplied from the circuit side, and correction was performed using the correction magnetic field generated by the convergence coil. However, recently, self-convergence type deflection yoke devices have become mainstream, and residual misconvergence occurs around the cathode ray tube (deflection yoke).

So-called I, in which the circuit side (magnet for magnetic field adjustment, etc.) and the circuit side are separated.
TC (Integrated Tube Compon)
In general, there is a need for a deflection yoke device that can easily correct misconvergence as a whole only on the cathode ray tube side.

The present invention has been made in view of the above points, and whether the deflection yoke device is equipped with a convergence device or the convergence device is provided separately from the deflection yoke device, it can be easily separated from the circuit side. The present invention provides a deflection yoke device that makes it possible to correct misconvergence.

Summary of the Invention In a deflection yoke device having a convergence correction device, at least one
The system is equipped with several auxiliary coils, and supplies the voltage induced by the magnetic field interlinking to the auxiliary coils as a parabola correction current to a convergence device installed in the deflection yoke. It is no longer necessary to supply correction current to the device from the circuit side, so-called IT
This provides a deflection yoke device that can accommodate C.

Specific Examples of the Invention Examples of the present invention will now be described in detail with reference to the drawings. In FIG. 1, an auxiliary coil 1 is placed in a portion of the horizontal deflection yoke that is generally called a window, and a convergence coil 2 includes a full-wave rectifier circuit 3, a variable resistor 4, and a convergence coil 2 provided at the rear end of the deflection yoke separator. connected to the circuit. A horizontally periodic voltage is induced in the auxiliary coil 1 by the interlinking horizontal magnetic field, and this induced voltage is supplied to the convergence coil as a horizontally periodic parabola correction current via a full-wave rectifier circuit and a variable resistor.

The correction magnetic field generated by this parabola correction current corrects the X-axis vertical line misconvergence shown in FIG.

According to the deflection yoke device according to the present invention, misconvergence can be easily corrected using a correction current obtained on the cathode ray tube side, so that the so-called ITC, which is separated from the circuit side, can be used.
It is possible to obtain a deflection yoke device with high convergence accuracy that can correspond to. Furthermore, the position of the auxiliary coil in this example is set to 90°.
If you shift the parabola correction current in the vertical layer phase, the screen Y
Ability to correct horizontal misconvergence of vertical lines.

Furthermore, it goes without saying that the convergence correction device is not limited to the rear end of the deflection yoke separator, but may be provided at other locations or separately. Furthermore, the rectifier circuit for the auxiliary coil induced voltage is not limited to the full-wave rectifier circuit, and other known circuits can be used.

As described above, according to the deflection yoke device of the present invention, even in a deflection yoke device equipped with a convergence correction device, the correction current for reducing residual misconvergence can be separated from the circuit side and obtained on the cathode ray tube side, thereby improving convergence. Not only can the correction device be made into an ITC, but also a deflection yoke device with high convergence accuracy can be obtained, and its industrial value is extremely great.

[Brief explanation of the drawing]

FIG. 1(a) is a bottom view of the deflection yoke device according to the present invention;
FIG. 1(b) is a circuit diagram of a convergence device included in the deflection yoke device of the present invention, FIG.
FIG. 5(a) is a plan view of a deflection yoke device equipped with a conventional convergence correction device, and FIG. 5(b) is an explanatory diagram of the schematic structure and operation of the convergence correction device. 1... Auxiliary coil, 2... Convergence coil,
3... Full-wave rectifier circuit, 4... Variable resistor.

Claims (1)

[Claims] In a deflection yoke device including a convergence correction device, at least one auxiliary coil for supplying a correction current to the convergence correction device is provided in the magnetic field formed by the deflection yoke device, and the auxiliary coil is connected to the convergence correction device. A deflection yoke device configured by being connected to a device.