JPH09245672A - Color picture tube equipment - Google Patents

Abstract

(57) Abstract: An object of the present invention is to eliminate the deviation of static convergence due to temperature drift of an electron gun of a color picture tube. A color picture tube device in which a convergence adjustment device (20) is mounted on the outside of a neck (5) on which an electron gun (7) for emitting three electron beams (6B, 6G, 6R) arranged in a line is arranged. A four-pole magnet 25 having a magnetic force temperature coefficient larger than that of the magnets 22 and 23 of the convergence adjusting device, or a first four-pole magnet having a magnetic force temperature coefficient larger than that of the magnet of the convergence adjusting device and a first magnetic pole having a magnetic force temperature coefficient smaller than that. Two 4-pole magnets were arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-line type color picture tube apparatus, and more particularly to a color picture tube apparatus having improved convergence characteristics of three electron beams arranged in a row passing through the same plane.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, an in-line type color picture tube device has an envelope composed of a panel 1 and a funnel 2, and an inner surface of the panel 1 is provided with blue, green,
A phosphor screen 3 including a striped three-color phosphor layer that emits red light is provided, and a shadow mask 4 is arranged inside the phosphor screen 3 so as to face the phosphor screen 3. On the other hand, in the neck 5 of the funnel 2, a center beam 6G and a pair of side beams 6B that pass on the same plane
, 6R arranged in a row with three electron beams 6B, 6G, 6
An electron gun 7 that emits R 2 is provided. A deflection device 9 is attached to the outside of the funnel 2 near the boundary between the large-diameter portion 8 and the neck 5. Further, a convergence adjusting device 10 (PCM: Purity Convergence Magnet) is attached to the outside of the neck 5.

This convergence adjusting device 10 is shown in FIG.
As shown in FIG. 2, it has a pair of two annular 4-pole magnets 12 and a pair of two annular six-pole magnets 13, and these four-pole and six-pole magnets 12 and 13 are disposed via a spacer 14. The frame 15 is rotatably supported by the frame 15.

In this in-line type color picture tube device,
The convergence adjusting device 10 adjusts the three electron beams 6B, 6G, 6R emitted from the electron gun 7 so as to concentrate on one point in the center of the screen (static convergence adjustment), and adjusts by the convergence adjusting device 10. The three electron beams 6B, 6G and 6R thus generated are deflected by the horizontal and vertical deflection magnetic fields generated by the deflecting device 9, and the phosphor screen 3 is horizontally and vertically scanned through the shadow mask 4 to display a color image. It is supposed to do.

However, the convergence adjusting device 10 of the conventional in-line type color picture tube device includes the magnets 12 and 13.
Is made of barium ferrite with a temperature coefficient of magnetic force of 0.26% / ° C, the three electron beams 6B, 6G, and 6R are converged so that they are concentrated at one point in the center of the screen. When assembled, the heat of the monitor device heats the convergence adjusting device 10, and this heating causes the magnets 12 of the convergence adjusting device 10 to move.
The magnetic force of No. 13 decreases, and the static convergence shifts to 0.2 mm between the pair of side beams 6B and 6R and 0.1 mm between each electron beam 6B, 6G and 6R, and the image quality deteriorates.

Therefore, in a high-definition color picture tube, the magnetic force temperature coefficient of each magnet of the convergence device is 0.02 to 0.02.
Al-Ni-Co or Fe-Cr- of 0.03% / ° C or less
It is formed of Co or the like, and the decrease in the magnetic force of each magnet due to the heating of the convergence adjusting device is suppressed, and the static convergence deviation is ± 0.05 between the pair of side beams.
mm, ± 0.05 mm between electron beams.

[0007]

As described above, the color picture tube is provided with two sheets 1 on the outside of the neck where the electron gun is arranged.
A convergence adjusting device having a pair of annular 4-pole and 6-pole magnets is mounted, and the convergence adjusting device adjusts the convergence so that the three electron beams emitted from the electron gun are concentrated on one point in the center of the screen. . However, even if the convergence is adjusted in this manner, the temperature coefficient of magnetic force of each magnet is as high as 0.26% / ° C. Therefore, when the color picture tube is incorporated in the monitor device, the heat of the monitor device heats the convergence device. This heating lowers the magnetic force of each magnet, deviates the static convergence, and deteriorates the image quality. Therefore, in a high-definition color picture tube, a convergence adjusting device is configured with magnets having a magnetic force temperature coefficient of 0.02 to 0.03% / ° C or less to suppress the decrease in the magnetic force of each magnet due to heating, thereby suppressing static convergence. The gap is kept low.

However, even if the convergence adjusting device is constructed as described above, the color picture tube also suffers from static convergence deviation due to temperature drift of the electron gun. Therefore, when incorporated in a monitor device, there is a problem that the deviation of the static convergence due to heat generation of the monitor device cannot be sufficiently reduced.

The present invention has been made to solve the above problems, and an object thereof is to eliminate the deviation of static convergence due to the temperature drift of the electron gun of a color picture tube.

[0010]

An adjustable magnetic field is generated outside a neck on which an electron gun for emitting three electron beams arranged in a line consisting of a center beam and a pair of side beams passing on the same plane is arranged. In a color picture tube device in which a convergence adjusting device having a plurality of sets of magnets is mounted, a quadrupole magnet having a magnetic force temperature coefficient larger than that of the magnet of the convergence adjusting device is arranged outside the neck.

Further, the temperature coefficient of magnetic force of the 4-pole magnet is set to 0.
It was set to 26 to 0.52% / ° C.

Further, the quadrupole magnet has magnetic poles for generating a magnetic field for moving the pair of side beams outward in the arrangement direction of the three electron beams.

Further, a plurality of sets of magnets for generating an adjustable magnetic field outside the neck in which an electron gun for emitting three electron beams arranged in a line consisting of a center beam and a pair of side beams passing on the same plane is arranged. In a color picture tube device in which a convergence adjustment device having the above is installed, a first four-pole magnet having a magnetic force temperature coefficient larger than that of the magnet of the convergence adjustment device and the first four
A second 4-pole magnet having a temperature coefficient of magnetic force smaller than that of the pole magnet is arranged.

Further, the second quadrupole magnet generates a magnetic field in the opposite direction to the magnetic field generated by the first quadrupole magnet.

Furthermore, a plurality of sets of magnetic field generating an adjustable magnetic field are formed on the outside of the neck where an electron gun for emitting a single row of three electron beams consisting of a center beam passing through the same plane and a pair of side beams is arranged. In a color picture tube device equipped with a convergence adjusting device having a magnet, a magnetic field is generated on the outside of the neck for moving a pair of side beams in the same direction as the changing direction of the electron beam spacing due to the temperature rise of the electron gun. A polar magnet was placed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an in-line type color picture tube device, which is one form thereof. This color picture tube device has an envelope composed of a panel 1 and a funnel-shaped funnel 2.
On the inner surface of the panel 1, there is provided a phosphor screen 3 composed of a stripe-shaped three-color phosphor layer which emits blue, green and red light, and a shadow mask 4 is provided inside the phosphor screen 3 so as to face the phosphor screen 3. It is arranged. On the other hand, in the neck 5 of the funnel 2, a center beam 6 that passes on the same plane
An electron gun 7 that emits three electron beams 6B, 6G, and 6R arranged in a row and composed of G and a pair of side beams 6B and 6R.
Are arranged. A deflection device 9 is attached to the outside of the funnel 2 near the boundary between the large-diameter portion 8 and the neck 5. Further, a convergence adjusting device 2 is provided outside the neck 5.
0 (PCM: Purity Convergence Magnet) is installed.

This convergence adjusting device 20 is shown in FIG.
As shown in FIG. 2, a pair of annular four-pole magnets 22 and a pair of annular six-pole magnets 23 of two pieces are mounted on the cylindrical frame 21 mounted on the outside of the neck 5 via the spacer 24. It is rotatably supported and is configured so that the magnetic field for the three electron beams can be adjusted by arbitrarily changing the magnetic pole position. These 4-pole and 6-pole magnets 22 and 23 have Al-Ni- magnetism temperature coefficients of 0.02 to 0.03% / ° C. or less so as to prevent convergence deviation due to temperature drift of the convergence adjusting device 20 itself. C
It consists of o.

Further, in this embodiment, an annular four-pole magnet 25 is arranged on the frame 21 of the convergence adjusting device 20 adjacent to the six-pole magnet 23 at the rear portion thereof. This 4-pole magnet 25 has a temperature coefficient of magnetic force of 0.
It is made of a material having a magnetic temperature coefficient of 0.26 to 0.52% / ° C, which is larger than those of the 4-pole and 6-pole magnets 22 and 23 of the convergence adjusting device 20, such as 26% / ° C barium ferrite.

The convergence adjustment device 20 adjusts the static convergence as shown in FIG. 3 when viewed from the front of the color picture tube (phosphor screen side), with a quadrupole magnet 25 and a pair of side magnets. Beam 6
B, 6R are arranged so as to generate a magnetic field 27 that separates outward in the arrangement direction of the three electron beams 6B, 6G, 6R arranged in a line as shown by the arrow 28. The three-electron beams 6B, 6G, and 6R are adjusted by the pole and sextupole magnets 22 and 23 so as to concentrate on one point on the center of the screen.

As described above, the convergence adjusting device 2
When the 4-pole and 6-pole magnets 22 and 23 of 0 are made of a small material having a magnetic force temperature coefficient of 0.02 to 0.03% / ° C. or less, it is possible to prevent convergence deviation due to temperature drift of the convergence adjusting device 20 itself, and A 4-pole magnet 25 having a larger temperature coefficient of magnetic force than the 4-pole and 6-pole magnets 22 and 23 of the convergence adjusting device 20 is arranged in a row with respect to the pair of side beams 6B and 6R.
By arranging so as to generate the magnetic field 27 that separates outward in the arrangement direction of B, 6G, and 6R, it is possible to eliminate the convergence deviation due to the temperature drift of the electron gun 7.

That is, when the temperature of the color picture tube incorporated in the monitor device rises due to the heat generated by the monitor device, the temperature drift of the electron gun 7 causes a pair of side beams 6B,
6R changes in the direction away from each other. At this time, since the magnetic force of the quadrupole magnet 25 decreases due to the temperature increase, the pair of side beams 6B and 6R change so as to approach each other. As a result, each electron beam 6B, 6 in the electron gun 7
Even if the temperature rises, the G and 6R orbits have the 4-pole and 6-pole magnets 22 and 23 of the convergence adjusting device 20.
Thus, it is possible to keep the convergence adjusted state and prevent the static convergence from deviating.

For example, due to the temperature drift of the electron gun 7,
The distance between the pair of side beams 6B and 6R is 0.2 on the screen.
In the case of a color picture tube displaced by mm, if a 4-pole magnet 25 made of barium ferrite with a magnetic force temperature coefficient of 0.26% / ° C is attached as described above, when the temperature of the monitor device rises to 20 ° C, a pair of side Since the intervals of the beams 6B and 6R change by -0.2 mm on the screen, the static convergence deviation can be almost eliminated.

The deviation of the distance between the pair of side beams on the screen due to the temperature drift of the normal color picture tube is as follows:
Since it is about 0.20 to 0.40 mm, by setting the temperature coefficient of magnetic force of the 4-pole magnet to 0.26 to 0.52% / ° C, static convergence due to temperature drift in almost all cases of color picture tubes Can be corrected.

Next, a different configuration of the convergence adjusting device will be described.

Similar to the PCM device shown in FIG. 2, the convergence adjusting device shown in FIG. 4 has a set of two annular four poles in a tubular frame 21 mounted on the outside of the neck 5 of the color picture tube. Similarly to the magnet 22, a pair of annular six-pole magnets 23 is rotatably supported via a spacer 24, and the magnetic pole position can be arbitrarily changed to adjust the magnetic field for three electron beams. Has been done. Each of the 4-pole and 6-pole magnets 22 and 23 has a magnetic force temperature coefficient of 0.02 to 0.02 so that the convergence drift due to the temperature drift of the convergence adjusting device 20 itself does not occur.
It is composed of Al-Ni-Co of 0.03% / ° C or less.

Further, in the convergence adjusting device 20, two annular four-pole magnets 25 and 29 are arranged on the frame 21 adjacent to the six-pole magnet 23 at the rear portion thereof. Of the two four-pole magnets 25 and 29, one of the four-pole magnets 25 (first four-pole magnet) has a magnetic force temperature coefficient of 0.26 to 0.52% / ° C., which is equal to that of the convergence adjusting device 20. It is made of a material larger than the 4-pole and 6-pole magnets 22 and 23, and the other 4-pole magnet 29 (second 4-pole magnet).
Is made of Al—Ni—Co having a magnetic force temperature coefficient smaller than that of the one quadrupole magnet 25 and 0.02 to 0.03% / ° C. or less.

The static convergence adjustment by the convergence adjusting device 20 is performed by the three electron beams 6B and
After adjusting 6G and 6R to concentrate on one point on the center of the screen, as shown in FIG. 5 when viewed from the front of the color picture tube, the other quadrupole magnet 29 is connected to the pair of side beams 6B. , 6R are arranged so as to generate a magnetic field 31 approaching the inner side in the arrangement direction of the three electron beams 6B, 6G, 6R arranged in a line as shown by arrow 30, and
One quadrupole magnet 25 is connected to a pair of side beams 6B and 6R.
On the other hand, as shown by the arrow 28, the magnetic field 27 which is separated outward in the arrangement direction of the three electron beams 6B, 6G, and 6R arranged in a line is arranged.
To generate. More specifically, the quadrupole magnets 25 and 29 are superposed so as to generate magnetic fields 27 and 31 in opposite directions to each other so that the generated magnetic field becomes zero, and then the pair of quadrupole magnets 25 and 29 are paired. Of three side-beams 6B and 6R with three electron beams 6B arranged in a line
, 6G, 6R are arranged on the frame of the convergence adjusting device 20 so that they are arranged in the direction of arrangement.

As another adjusting method, a 4-pole magnet 25,
29 so as to generate magnetic fields 27 and 31 opposite to each other so that the generated magnetic field becomes zero, and the magnetic fields 27 and 31 of these magnets 25 and 29 move the pair of side beams 6B and 6R. After attaching to the frame of the convergence adjusting device 20 so that the direction is the arrangement direction of the three electron beams 6B, 6G, and 6R arranged in a line, the three electron beams are set by a pair of four-pole and six-pole magnets 22 and 23. 6
You may adjust so that B, 6G, and 6R may concentrate on one point on the screen.

Thus, the temperature coefficient of magnetic force of the 4-pole and 6-pole magnets 22 and 23 of the convergence adjusting device 20 is 0.0.
2 to 0.03% / ° C. or less, the composition of
Similar to the convergence adjusting device shown in (1), it is possible to prevent the deviation of the convergence due to the temperature drift of the convergence adjusting device 20 itself. Moreover, the temperature coefficient of magnetic force is 0.26
~ 0.52% / ° C and 4 of the convergence adjusting device 20
4-pole magnet 25 smaller than the pole and 6-pole magnets 22 and 23
And the temperature coefficient of magnetic force is 0.02 to 0.03% / ° C. or less,
A four-pole magnet 29, which is larger than the four-pole magnet 25, is superposed so that the generated magnetic field becomes zero.
A pair of side beams 6 by magnetic fields 27.30 of 5,29
3 electron beams 6B and 6 in which B and 6R move in a line
If they are arranged so as to be in the arrangement direction of G and 6R, when there is no temperature change, the orbits of the three electron beams 6B, 6G, and 6R become the same as when these four-pole magnets 25 and 29 are not arranged, and convergence adjustment is performed. 4 poles and 6 of device 20
There is no deviation in the static convergence adjusted by the polar magnets 22 and 23.

On the other hand, when the temperature of the color picture tube incorporated in the monitor device rises due to heat generation of the monitor device, the temperature drift of the electron gun 7 causes a pair of side beams 6B, 6B.
When R changes away from each other, 4-pole magnet 25
, The magnetic force of the four-pole magnet 29 becomes relatively strong because the magnetic force decreases due to the temperature rise, and the pair of side beams 6B, 6B,
6R changes toward each other. As a result, the trajectories of the electron beams 6B, 6G, and 6R in the electron gun 7 can be kept in the convergence adjusted state even if the temperature rises, so that the static convergence does not shift. be able to.

[0032]

When the convergence adjusting device configured as described above is mounted on the outer side of the neck of the color picture tube which emits the three electron beams arranged in a row and composed of the center beam and the pair of side beams which pass on the same plane. It is possible to prevent the static convergence from deviating due to the temperature drift of the electron gun.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an in-line type color picture tube device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a convergence adjustment device mounted on the outside of the neck of the inline type color picture tube.

FIG. 3 is a diagram for explaining an action of a quadrupole magnet arranged in the convergence adjusting device with respect to a pair of side beams.

FIG. 4 is a diagram showing a different configuration of the convergence adjusting device mounted on the outside of the neck of the in-line type color picture tube.

5 (a) and 5 (b) are diagrams for explaining the action of two quadrupole magnets arranged in the convergence adjusting device shown in FIG. 4, respectively.

FIG. 6 is a diagram showing a configuration of a conventional in-line type color picture tube device.

FIG. 7 is a diagram showing a configuration of a convergence adjusting device mounted on the outside of the neck of the conventional inline type color picture tube.

[Explanation of symbols]

 5 ... Neck 6G ... Center beam 6B, 6R ... Pair of side beams 7 ... Electron gun 20 ... Convergence adjusting device 22 ... 4-pole magnet 23 ... 6-pole magnet 25 ... 4-pole magnet 29 ... 4-pole magnet

Claims (6)

[Claims] 1. A plurality of sets of magnets for generating an adjustable magnetic field outside a neck on which an electron gun for emitting a single row of three electron beams consisting of a center beam and a pair of side beams passing on the same plane is arranged. In a color picture tube device in which a convergence adjustment device having the above is installed, a four-pole magnet having a magnetic force temperature coefficient larger than that of the magnet of the convergence adjustment device is arranged outside the neck. apparatus. 2. The temperature coefficient of magnetic force of the 4-pole magnet is 0.26 to
The color picture tube device according to claim 1, wherein the color picture tube device is 0.52% / ° C. 3. The color picture tube device according to claim 1, wherein the quadrupole magnet has magnetic poles for generating a magnetic field for moving the pair of side beams outward in the arrangement direction of the three electron beams. 4. A plurality of sets of magnets for generating an adjustable magnetic field outside a neck in which an electron gun for emitting a single row of three electron beams consisting of a center beam and a pair of side beams passing on the same plane is arranged. In a color picture tube device in which a convergence adjustment device having the above is installed, a first four-pole magnet having a magnetic force temperature coefficient larger than that of the magnet of the convergence adjustment device is provided outside the neck, and
And a second four-pole magnet having a magnetic force temperature coefficient smaller than that of the four-pole magnet. 5. The color picture tube device according to claim 4, wherein the second quadrupole magnet generates a magnetic field in the opposite direction to the magnetic field generated by the first quadrupole magnet. 6. A plurality of sets of magnets for generating an adjustable magnetic field outside a neck in which an electron gun for emitting three electron beams arranged in a line consisting of a center beam and a pair of side beams passing on the same plane is arranged. In a color picture tube device equipped with a convergence adjustment device having a magnetic field, a magnetic field for moving a pair of side beams in the same direction as the changing direction of the electron beam spacing due to the temperature rise of the electron gun is generated outside the neck. A color picture tube device having a polar magnet.