JPS6081743A - Flat type color cathode-ray tube device - Google Patents

Abstract

PURPOSE:To remove one-axis directional mislanding without requiring any power consumption by segmenting the annularity of an annular magnetic core for a deflection means and providing a columnar two-pole magnet in this segmentation section so as to be rotated and adjusted. CONSTITUTION:The nearly intermediate section of one-sided side section 8c of an annular magnetic core 8 that centers around the external surface of the tube body 2 of a deflection means 7 is segmented and a plastic holder 15 that is provided with a cylindrical two-pole magnet 14 so as to be rotated and adjusted is fit to this segmentation section. The number of magnetic fluxes applied in the magnetic core 8 and the bias magnetic field between the center poles 8a and 8b of the magnetic core 8 can be adjusted by rotating the adjusting the cylindrical two-pole magnet 14. As a result, this cylindrical two-pole magnet 14 can be rotated and adjusted and the one-axis directional mislanding generated when a flat type cathode-ray tube device is manufactured by adjusting a double pole magnet 12 can be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat color cathode ray tube device suitable for use in a small portable color television receiver.

BACKGROUND ART AND PROBLEMS Previously, flat color cathode ray tube devices as shown in FIGS. 1, 2 and 3 have been proposed for use in small portable color television receivers.

In Figures 1 and 2, (1) shows this flat color cathode ray tube device as a whole, and (2) shows the flat tube body of this flat color cathode ray tube device (1). Body (2
) consists of, for example, a dish-shaped front glass half (2a) and a dish-shaped rear glass half (2b) that is bonded and sealed to the periphery of this front glass half (2a), and both halves (2a) and (2b) A flat space is formed between them. Then, on the inside of the front glass half-hole (2a), a color fluorescent surface (3) made of red, green, and blue light-emitting fluorescent material, such as a strip-like repeated color fluorescent surface (3), is provided, and a color fluorescent surface (3) corresponding to this color fluorescent surface (3) is provided. A gucha grill (4) is provided.

In addition, there is a colored fluorescent surface (3) inside the rear glass half-closed (2b).
A back electrode (5) is provided opposite to.

A neck tube (2C) is provided approximately on the extension of this color fluorescent surface (3), and an electron gun (6) is accommodated within this neck tube (2C). This electron gun (6) is, for example, a so-called trinitron tube (trade name) with 1 gun and 3 beams.
An electron gun with a similar configuration is used.

Then, the electron beam emitted by the electron gun (6) is deflected (hereinafter referred to as horizontal deflection) approximately perpendicular to the axial direction of the electron gun (6) and approximately in the plane direction of the color fluorescent surface (3).
A deflecting means for deflecting the electron beam in a direction perpendicular to the color fluorescent surface (3) (hereinafter referred to as vertical deflection) is provided between the color fluorescent surface (3) and the electron gun (6). This horizontal deflection causes the electron beam to scan in the horizontal direction on the color phosphor surface (3), and due to the cooperation of the vertical deflection and the deflection based on the potential difference between the back electrode (5), the intermediate electrode, and the target electrode. The electron beam is scanned vertically over the fluorescent surface (3). Therefore, in this case, the above-mentioned vertical deflection to the electron beam is such that, for example, the deflection angle is 1
A small angle of 0' to 200 is sufficient. Regarding the horizontal and vertical deflections of this electron beam, for example, the vertical deflection, which has a smaller deflection angle, is caused by electrostatic deflection, while the horizontal deflection, which requires a larger deflection angle, is caused by electromagnetic deflection.

Such a deflection means includes a common deflection means (
7), it can be configured to be performed at the same location. This deflection means (7) is provided, for example, on the downstream side of the electron gun (6).
An annular magnetic core (8) made of high magnetic permeability, for example, ferrite, which surrounds the outer periphery of the tube body (2), and an electromagnetic wire ring (9) through which a horizontal deflection current passes, are arranged within the tube body (2). It is composed of a high permeability magnetic material (uO).

For example, the magnetic core (8) has a ring shape that surrounds the outer periphery of the tube (2) as shown in the cross section of FIG. 2) A pair of trapezoidal center poles (8a) and (8b) having a shape corresponding to the shape of the tube body (2) (13) are placed inside so as to face each other in the thickness direction of the tube body (2). The center poles (8a) and (8b) are made to protrude from each other, and a wire ring (9) is wrapped around the outer periphery of the center poles (8a) and (8b) in a saddle shape.

In this way, a magnetic flux corresponding to the horizontal deflection current flowing through the wire ring (9) is generated between the two center soles (8a) and (8b), that is, across the tube body (2).
) to apply a magnetic field in the thickness direction of the tube (2) to the path of the electron beam. On the other hand, a high magnetic permeability material OI]) is placed between both center poles (8a) and (8b) in the tube body (2), facing the path of the electron beam. This high magnetic permeability material (II) is sandwiched between the electron beam path and the tube body (2).
) for example, a pair of trapezoidal plate-shaped high magnetic permeability materials (1
0a) and (10b), which concentrate the magnetic flux between the center poles (8a) and (8b) on the path of the electron beam. In this case, the shape of the center pole is
Since the shape of the high magnetic permeability material is trapezoidal in this case, the magnetic flux can be concentrated efficiently. Further, these pairs of high magnetic permeability materials (10a) and (10b) are made of high magnetic permeability material, such as ferrite, which has a high specific resistance and is electrically conductive, for example, a specific resistance of about 104 to 1070. These pairs of high magnetic permeability bodies (10a) and (10b) serve as electrostatic deflection plates that perform the above-mentioned vertical deflection of the electron beam. That is, both high magnetic permeability bodies (10a)
and (iob), and a vertical deflection voltage is applied between them. In this case, since the deflection means (7) is arranged on the rear side of the electron gun (6), that is, on the high pressure side,
Both high magnetic permeability bodies (10a) and (10
In b), an anode voltage of, for example, 5 KV is applied, and a vertical deflection voltage is superimposed thereon. In the figure, α0 corresponds to the main lens of the electron gun (6), and is a rotation coil installed around the outer periphery of the neck tube (2c).
are a dipole magnet and a quadrupole magnet for utility correction, which are provided before and after this rotation coil Ql), respectively.

As mentioned above, by deflecting the electron beam in mutually orthogonal directions, that is, by performing one of the horizontal and vertical deflections by electromagnetic deflection and the other by electrostatic deflection, for example, horizontal deflection with a large deflection angle is performed by electromagnetic deflection. In the vertical direction, where the deflection angle is small and there is almost no problem with deflection distortion, electrostatic deflection is used, so the device can be easily miniaturized compared to conventional methods that use electromagnetic deflection for deflection in both directions. Further, compared to deflection in both directions using electrostatic deflection, deflection can be performed with smaller deflection distortion.

In the electromagnetic deflection means, a high magnetic permeability material GO) is arranged in the tube body (2) to concentrate magnetic flux on the path of the electron beam, so that the magnetic core on which the wire ring (9) is arranged. When (8) is placed outside the tube (2), the tube (
2) For example, a center pole (
Even if the spacing between 8a) and (8b) is narrow, the magnetic flux density to the electron beam path can be increased, thereby increasing its efficiency.

Furthermore, as mentioned above, high magnetic permeability materials (10a) and (1ob
) can be used as an electrostatic deflection plate for vertical deflection, the structure can be further simplified, and together with the fact that both horizontal and vertical deflection are in the same position, it is possible to further improve miniaturization. It can be measured.

By the way, when manufacturing such a flat type color cathode ray tube device (1), there are two steps:
Uniaxial misranging occurs due to deviations in assembly precision of the electron beam source in the electron gun (6).

The center pole (8a) of the magnetic core (8) is used to eliminate mislanding of uniaxial direction in conventional manufacturing.
A predetermined bias current was supplied to the wound electromagnetic wire ring (9) (8b) to generate a predetermined bias magnetic field, and the dipole magnet (1) was adjusted.

However, in order to eliminate such uniaxial mislanding, it is necessary to apply a predetermined bias current to the electromagnetic wire ring (9), and in a small color TV Noyon receiver using a portable battery, This was inappropriate because the power consumption increased accordingly.

OBJECTS OF THE INVENTION In view of the above, an object of the present invention is to eliminate uniaxial mislanding as described above without consuming power.

Summary of the Invention The present invention provides an electron gun located approximately on an extension of a color fluorescent surface, a back electrode facing the color fluorescent surface, and an outer periphery of a tube located between the color fluorescent surface and the electron gun. In a flat color cathode ray tube device having a deflection means having an annular magnetic core disposed in the deflection means, the annular shape of the annular magnetic core of the deflection means is divided, and a columnar dipole magnet can be rotatably adjusted in the divided portion. According to the present invention, a predetermined bias magnetic field can be generated by adjusting the rotation of the columnar bipolar magnet, and uniaxial mislanding can be removed without consuming power. I can do it.

Example 1 Tg Ig-%-, f;
Lu support. In this figure 4 to figure 8, figure 1 to figure 3
Portions corresponding to the figures are given the same reference numerals, and detailed explanation thereof will be omitted.

In this example, as shown in FIGS. 4 and 5, the deflection means (which covers the outer periphery of the force tube (2)) of the flat color cathode ray tube device (1) shown in FIGS. 1 and 2 is used. A silastic holder +151 in which an annular magnetic core (8) is divided approximately in the middle of one side (8c), and a cylindrical bipolar magnet I as shown in FIG. 6 is rotatably arranged in this divided part. The other parts are constructed as shown in FIGS. 1 and 2.

In this example, the number of magnetic fluxes flowing in the magnetic core (8) can be adjusted by adjusting the rotation of the cylindrical bipolar magnet (14) as shown in FIGS. 8A, B, and C. )
The bias magnetic field generated between the center poles (8a) and (8b) can be adjusted. Therefore, by rotating and adjusting the rotation of this cylindrical dipole magnet and adjusting the rotation of the dipole magnet, it is possible to eliminate uniaxial mislanding that occurs when manufacturing a flat color cathode ray tube device. According to this configuration, the power consumption is zero because mislanding in the axial direction of the cylindrical bipolar magnet I and the bipolar magnet (1) is removed. It goes without saying that this embodiment also provides the effects of the flat color cathode ray tube device as shown in FIGS. 1 and 2.

It goes without saying that the present invention is not limited to the above-described embodiments, and that various other configurations can be taken without departing from the gist of the present invention.

Effects of the Invention According to the present invention, a predetermined bias magnetic field can be generated by adjusting the rotation of a columnar dipole magnet, and mislanding in uniaxial direction can be removed without consuming power. It is extremely advantageous for use in portable color television receivers that use batteries.

[Brief explanation of drawings]

Figure 1 is a plan view showing an example of a flat color cathode ray tube;
The figure is a longitudinal center sectional view of Figure 1, and Figure 3 is the In
-I[1-line sectional view, FIG. 4 is a sectional view of essential parts of an embodiment of the flat color cathode ray tube of the present invention, and FIG. 5 is a perspective view showing an example of the magnetic core used in the present invention. 6 is a perspective view showing an example of a columnar bipolar magnet, FIG. 7 is a perspective view showing an example of a plastic holder, and FIG. 8 is a diagram for explaining the present invention. (2) is a flat tube, (3) is a color fluorescent surface, (5) is a back electrode, (6) is an electron gun, (7) is a deflection means, (8) is an annular magnetic core, (121 is a double The heavy pole magnet, u, is a cylindrical dipole magnet.

Claims (1)

[Claims] an electron gun located approximately on an extension of the color fluorescent surface, a back electrode facing the color fluorescent surface, and an annular shape disposed on the outer periphery of the tube located between the color fluorescent surface and the electron gun. A flat color cathode ray tube device having a deflection means having a magnetic core, characterized in that the annular magnetic core of the deflection means is divided, and a columnar dipole magnet is provided in the divided portion so as to be rotatable. A flat color cathode ray tube device.