JPH04264336A - Color cathode ray tube having deflecting yoke - Google Patents

Abstract

PURPOSE:To realize streamlining of adjusting operation on arch shape miss convergence and horizontal/vertical line cross. CONSTITUTION:A color cathode ray tube having a deflecting yoke is provided with a color cathode ray tube 1 equipped with a deflecting yoke 2, a magnet device 3 installed in the color cathode ray tube 1 so as to adjust static convergence and purity, arch shape adjusting/magnetizing magnets 4 (4a, 4b) installed in the deflecting yoke 2 so as to make arch shape miss convergence magnetizable/adjustable, and a cross adjusting coil 5 installed in the deflecting yoke 2.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube with a deflection yoke, and more particularly to a structure for static convergence, purity adjustment, arcuate misconvergence adjustment and dynamic convergence vertical and horizontal line cross adjustment in color adjustment of a color cathode ray tube.

0002

2. Description of the Related Art Conventionally, methods for automating static convergence and purity adjustment of a deflection yoke have been disclosed, for example, in Japanese Patent Laid-Open No. 54-40521 and Japanese Patent Laid-Open No. 57
-143244, etc.

However, bow misconvergence and vertical/horizontal line cross adjustment are often performed manually. That is, the mainstream of arcuate misconvergence adjustment is to select a magnetic material magnetized according to the arcuate misconvergence and attach it on the horizontal axis of the deflection yoke. In addition, for vertical and horizontal line cross adjustment, a magnetic material such as iron or permalloy is attached to the deflection yoke to change the magnetic flux distribution.

0004

In the above-mentioned prior art, arcuate misconvergence and vertical/horizontal line cross adjustment are often performed manually, which poses an obstacle to automation and rationalization.

SUMMARY OF THE INVENTION An object of the present invention is to provide a color cathode ray tube with a deflection yoke that can improve the efficiency of arcuate misconvergence and vertical/horizontal line cross adjustment operations.

[0006]

[Means for Solving the Problems] In order to achieve the above object, a color cathode ray tube to which a deflection yoke is attached, a magnet device for static convergence and purity adjustment attached to the color cathode ray tube, and a magnet device attached to the deflection yoke, This configuration includes a bow adjustment magnetization magnet that allows bow misconvergence to be magnetized and adjusted, and a cross adjustment coil attached to a deflection yoke.

[0007]

[Function] Since it is equipped with an adjustable magnetization magnet, the bow misconvergence can be appropriately and automatically adjusted by magnetizing the magnet according to the amount of bow misconvergence. be able to.

Furthermore, since the bow adjustment magnetization magnet is attached, by changing the inductance of the upper and lower coils of the horizontal coil that constitutes the deflection yoke using the cross adjustment coil, the magnetic flux distribution generated in the upper and lower coils can be changed. Vertical and horizontal line misconvergence is corrected appropriately and automatically.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a color cathode ray tube 1 is equipped with a deflection yoke 2 and a magnet device 3 for static convergence and purity adjustment. The magnet device 3 is composed of two-pole, four-pole, and six-pole annular magnets. These magnets have tooth profiles formed on a part or the entire circumference of their outer peripheral surfaces, and are rotated by a drive gear (not shown) that meshes with the teeth of the magnets.

Mounted on the deflection yoke 2 is a separator 7 made of an insulator to which a magnet 4 (4a, 4b) for bow adjustment magnetization, a coil 5 for cross adjustment, and a terminal 6 are attached. The bow adjustment magnets 4a, 4b
is placed on the horizontal axis, as shown in Figure 2(a), or
Or, as shown in FIG. 2(b), it is arranged on the vertical axis. The cross adjustment coil 5, as shown in FIG.
It is connected to the horizontal coils 2a and 2b of the deflection yoke 2. One terminal 6 that applies voltage to the horizontal coils 2a, 2b
The terminal a is connected to the connecting wire of the horizontal coils 2a and 2b, and the other terminal 6b is connected to the cross adjustment coil 5 in a variable manner, so that the inductance of the coil parts 5a and 5b can be varied. . Therefore, the static convergence and purity are adjusted by turning the magnet device 3.

Next, the adjustment of arcuate misconvergence will be explained. As shown in Fig. 4, arcuate misconvergence occurs when the central horizontal raster (deflection pattern G) corresponding to the center beam g is correctly adjusted horizontally, and the deflection pattern R of one side beam r is aligned to the left and right sides of the screen. This refers to a color shift in which the deflection pattern B of the other side beam b is both upward at the edge and downward at the left and right edges of the screen, or vice versa. This occurs when the three-electron gun is mounted with an error tilted from the horizontal axis.

To correct this, generally, as shown in FIG. 5, the beam r,
It is sufficient to bend b twice in opposite directions vertically. That is, in the example of Fig. 5, beam r is bent upward and beam b is bent downward at position A, then beam r is bent downward and beam b is bent upward at position B, and the trajectories of beams r and b are corrected. .

The bow adjustment magnetization magnets 4a and 4b are used in combination with the magnet device 3 described above to correct bow misconvergence. In the case of the example in Figure 5,
The magnet device 3 corrects the beam r upward and the beam b downward at the position A, and the bow adjusting magnetization magnets 4a and 4b correct the beam trajectory at the position B. That is, after correction by the magnet device 3, the correction magnetic field magnetizes the bow adjustment magnetization magnets 4a and 4b to the same polarity according to the amount of bow misconvergence, and moves the beam r and the inductance b in opposite directions in the vertical direction. make. This corrects the arcuate misconvergence.

Next, vertical and horizontal line cross adjustment will be explained. By changing the inductance of the coils 5a, 5b of the cross adjustment coil 5, the inductance of the horizontal coils 2a, 2b changes, and the magnetic flux distribution generated in the horizontal coils 2a, 2b changes. That is, the amount of vertical and horizontal crossing in the crosshatch changes, and the vertical and horizontal line misconvergence is corrected.

[0015]

According to the present invention, since a magnet for bow adjustment magnetization which can be magnetized is attached, the amount of bow misconvergence can be adjusted by magnetizing the magnet according to the amount of bow misconvergence. Furthermore, since a cross adjustment coil is attached, correction can be made by changing the inductance of the upper and lower horizontal coils of the deflection yoke using the cross adjustment coil. That is, the arcuate misconvergence and the vertical and horizontal line misconvergence can be efficiently adjusted, the work can be reduced, and automation is possible.

[Brief explanation of the drawing]

FIG. 1 is a side view of a color cathode ray tube with a deflection yoke according to an embodiment of the present invention.

FIGS. 2(a) and 2(b) are explanatory diagrams of correction by a bow adjustment magnetization magnet.

FIG. 3 is a connection diagram of a cross adjustment coil.

FIG. 4 is an explanatory diagram of arcuate misconvergence.

FIG. 5 is an explanatory diagram of arcuate misconvergence correction.

[Explanation of symbols]

1 Color cathode ray tube 2 Deflection yoke 3 Magnet device 4, 4a, 4b Bow adjustment magnetization magnet 5 Cross adjustment coil

Claims (1)

[Claims] 1. A color cathode ray tube to which a deflection yoke is attached, a magnet device for static convergence and purity adjustment attached to the color cathode ray tube, and a bow attached to the deflection yoke to enable magnetization adjustment of arcuate misconvergence. A color cathode ray tube with a deflection yoke, which is equipped with an adjustment magnetization magnet and a cross adjustment coil attached to the deflection yoke.