JPH06176695A - Method and device for adjusting image of cathode-ray tube - Google Patents

Abstract

PURPOSE:To provide an image adjusting device for a cathode-ray tube whereby magnetic field distribution created by a deflection yoke is properly corrected in a short time, without depending on the proficiency of skilled workers, to provide fine and high-grade images. CONSTITUTION:A standard yoke 23 defined as a standard is mounted on a color cathode-ray tube 11 to be adjusted, to cause emission of a predetermined adjustment pattern. The adjustment pattern detected by an optical sensor 27 is compared with a preset normal pattern, and the mounting position of a correcting magnetic member 17 is determined from the difference between them. Since the correcting magnetic member 17 is mounted on the color cathode- ray tube 11 according to the determined mounting position after removal of the standard yoke 23, magnetic field distribution can be corrected properly in a short time without depending on the proficiency of skilled workers and fine, high-grade images are obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube image adjusting method and apparatus for adjusting an image by a deflection yoke and a correcting magnetic member in a cathode ray tube manufacturing process.

[0002]

2. Description of the Related Art Generally, in a manufacturing process of a cathode ray tube such as a color cathode ray tube, an image adjusting operation is performed in a final step. In this image adjustment work, an image signal is supplied to a color CRT that is a combination of parts such as a deflection yoke to display an appropriate inspection pattern, and the rotation angle of the deflection yoke and the position in the tube axis direction are optimally adjusted. To do. In this case, the operator determines whether or not the deflection yoke is adjusted to the optimum state by visually observing the image projected on the color CRT. After the operator determines that the state is optimum in this way, so-called yoke attachment work is performed to fix the deflection yoke to the color CRT using silicon or the like.

The above-mentioned image adjustment work is intended to secure a proper image level mainly by absorbing various assembling errors in the assembling process of the color cathode ray tube by optimizing the mounting position of the deflection yoke.

This image adjustment work is conventionally performed as shown in FIG. That is, first, the color cathode ray tube 11 to be adjusted is fixed on the mount 13 of the inspection set 12, and the deflection yoke 14 and the socket 15 are attached to the color cathode ray tube 11. After that, a pattern light emitting device (not shown) built in the gantry 13 is operated to display a predetermined inspection pattern on the color cathode ray tube 11. Then, the operator visually judges the projected inspection pattern as described above, and checks the deflection yoke.
After the position of 14 is optimally set, the deflection yoke 14 is fixed to the neck portion of the color CRT with silicon or the like.

By the way, recently, a color CRT 11
Has been used for various displays, and higher quality images than ever have been demanded. For this reason, there are cases in which the position adjustment of the deflection yoke 14 described above is not sufficient, and as shown in FIG. 5, the correction magnetic member 17 including a magnetized magnet is provided inside the deflection yoke 14 and the color cathode ray tube 11. It has been proposed to attach it to the side wall to perform highly accurate image adjustment.

The correction magnetic member 17 is disclosed in Japanese Patent Laid-Open No.
No. 28145, and FIGS.
The one shown in is used.

Here, what is shown in FIG. 6 is a magnetic substance itself, which is suitable for being attached to the side wall of the color CRT 11.

Further, the one shown in FIG. 7 is suitable for sticking by inserting it into a gap formed between the inside of the deflection yoke 14 and the outer surface of the neck portion of the color cathode-ray tube 11, and is in the shape of a strip as shown in the figure. A magnetic material 17b and an adhesive portion 17c are provided on the plastic plate 17a. Then, the magnetic body 17b is inserted into a gap formed between the inside of the deflection yoke 14 and the outer surface of the color CRT 11, and is adhered to the outer surface of the color CRT 11 by the adhesive portion 17c. In addition, it is necessary to prepare some kinds of magnetic correction members 17 according to the kind of the color cathode ray tube 11 to be adjusted.

In this case, the position where the magnetic correction member 17 shown in FIGS. 6 and 7 is attached to the color cathode-ray tube 11 is determined by the operator while visually checking the inspection pattern projected on the color cathode-ray tube 11. Is a magnetic member for correction
It is necessary to be familiar with the types of 17 and which correction magnetic member 17 is attached and where the image of the color CRT 11 changes. Also, after the application, the image of the color cathode-ray tube 11 should be monitored to evaluate the result of the application, and if it is inappropriate, the application position should be changed immediately.

Furthermore, since a large difference occurs in the image level due to a minute difference in the sticking position, careful work by a highly skilled worker is required, and a lot of work time is required.
Although it depends on the type of the color CRT 11, it usually takes about 5 to 15 minutes to adjust one color CRT 11, and there are many problems in terms of work efficiency.

Further, the work itself includes the work of inserting the fixing magnetic member 17 into the gap between the inside of the deflection yoke 14 and the outer surface of the color cathode-ray tube 11 and fixing it, so that automation is difficult and the work efficiency is improved. Can't hope

[0012]

As described above, in the image adjustment work of the color cathode ray tube 11, the correction magnetic member 17 is attached to the outer surface of the color cathode ray tube 11 or the inside of the deflection yoke 14.
Since it is a work to correct the magnetic field distribution generated by the deflection yoke and finely adjust the errors in the assembly process of the color cathode ray tube 11, it is necessary to rely on humans, which requires a lot of work time, productivity and work efficiency. There is an upper problem. Further, the adjustment also depends on the proficiency level of the skilled worker, and thus variations may occur.

An object of the present invention is to appropriately correct the magnetic field distribution produced by the deflection yoke in a short time and obtain a fine and high-quality image without depending on the skill of a skilled worker. An object of the present invention is to provide an image adjustment method and apparatus for a cathode ray tube.

[0014]

According to a first aspect of the present invention, there is provided a method for adjusting an image of a cathode ray tube, wherein a standard deflection yoke is attached to a predetermined position of a cathode ray tube to be adjusted, and the deflection yoke is attached. The cathode ray tube is caused to emit a predetermined adjustment pattern, the adjustment pattern is detected by an optical sensor and compared with a preset normal pattern, and the correction magnetic member is attached to the cathode ray tube based on the difference from the normal pattern. The position is determined, and the correction magnetic member is attached after the deflection yoke defined as the standard is removed according to the determined attachment position.

According to another aspect of the present invention, there is provided a cathode ray tube image adjusting device, which includes a positioning mechanism for positioning a cathode ray tube to be adjusted at a predetermined adjustment position and a predetermined position of the cathode ray tube at the adjustment position as a standard. A mounting mechanism that detachably mounts the deflection yoke, an adjustment pattern light emitting device that causes the cathode ray tube to emit a predetermined adjustment pattern in the mounted state of the deflection yoke, and a mounting surface facing the light emitting surface of the cathode ray tube. A correction magnetic member for the cathode ray tube is provided which has an optical sensor for detecting the emitted adjustment pattern, compares the adjustment pattern detected by the optical sensor with a preset normal pattern, and compares the adjustment pattern with the normal pattern. The correction position determining means for determining the attachment position of the deflection yoke, and the shadow removing the deflection yoke according to the attachment position determined by the correction position determining means. Those having a mounting mechanism for mounting said correction magnetic member with respect to the line pipe.

[0016]

According to the method of adjusting an image of a cathode ray tube as set forth in claim 1, a standard deflection yoke is mounted at a predetermined position of the cathode ray tube to be adjusted, and a predetermined adjustment pattern is caused to be emitted by the cathode ray tube and detected by an optical sensor. Therefore, the correction magnetic member is attached to the cathode ray tube in accordance with the determined normal position, and the correction magnetic member is attached after the standard deflection yoke is removed according to the determined attachment position. An appropriate magnetic field distribution can be corrected within a short time without depending on the skill level of an operator, and a cathode ray tube with a fine and high-quality image can be obtained.

In the image adjusting device for a cathode ray tube according to a second aspect of the present invention, the positioning mechanism positions the cathode ray tube to be adjusted at a predetermined adjustment position, and the mounting mechanism sets the cathode ray tube at the predetermined position as a standard. The deflection yoke defined as is detachably mounted, and in this deflection yoke mounted state, the cathode ray tube is caused to emit a predetermined adjustment pattern by the pattern light emitting device, and the adjustment pattern detected by the optical sensor is set in advance. By comparing with a normal pattern, the mounting position of the correcting magnetic member with respect to the cathode ray tube is determined by the correction position determining means from the difference from the normal pattern, and the deflection is performed by the mounting mechanism according to the mounting position determined by the correction position determining means. Since the correction magnetic member is attached to the cathode ray tube from which the yoke is removed, it is possible to obtain an appropriate magnetic field in a short time without depending on the skill level of a skilled worker. Can correct the distribution, it is possible to obtain a cathode ray tube of a high quality image with definition.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the same reference numerals are given to the portions corresponding to the portions described in the conventional example.

In FIG. 1, reference numeral 21 denotes an adjusting table, which is
A positioning mechanism for positioning the color cathode ray tube 11 as a cathode ray tube to be adjusted at a predetermined adjustment position on the upper surface of 21.
22 are provided. As the positioning mechanism 22, a cradle that fits the lower side of the color CRT 11 and holds the color CRT 11 so that the display surface is a vertical surface is used.

Further, 23 is a standard yoke which is a deflection yoke defined as a standard, 24 is a socket, and these standard yoke 23 and socket 24 are a predetermined position of the color CRT 11 positioned at an adjusting position by a mounting mechanism 25. Is detachably attached. Further, a slide mechanism is used as the mounting mechanism 25, and the standard yoke 23 and the socket 24 are integrally moved in the tube axis direction of the color CRT 11 to be mounted at a predetermined position on the neck of the color CRT 11. is there.

Further, 26 is an adjustment pattern light emitting device, and this adjustment pattern light emitting device 26 supplies an image signal to the color cathode ray tube 11 equipped with the standard yoke 23 via the socket 24 to emit a predetermined adjustment pattern. Let Also,
Reference numeral 27 denotes an optical sensor, which is arranged so as to face the light emitting surface of the color cathode ray tube 11 positioned at the adjustment position, and detects a predetermined adjustment pattern emitted by the color cathode ray tube 11. In addition, this optical sensor 27
Is a computer-configured correction position determining means 28.
Is connected, the adjustment pattern detected by the optical sensor 27 is input, and compared with a preset normal pattern. Then, the mounting position of the correction magnetic member 17 on the color cathode-ray tube 11 is determined from the difference between the normal pattern and the adjustment pattern.

A technique for detecting the pattern displayed on the color CRT 11 by the optical sensor 27 and adjusting the image of the color CRT 11 based on the detected data is disclosed in, for example, Japanese Patent Laid-Open No. 4-47638. As described in JP-A-3-133027, etc., image data of the color cathode ray tube 11 corresponding to a normal pattern is stored in advance in the correction position determining means 28 constituted by a computer, and the normal pattern is handled. The image data to be adjusted and the image data based on the adjustment pattern detected by the optical sensor 27 are compared, and the type of the correction magnetic member 17 and the position where it should be attached are determined from the difference between the normal pattern and the adjustment pattern. ing.

Further, the correction position determining means 28 has a mounting mechanism 29.
Are connected to the color cathode ray tube 11 according to the mounting position determined by the correction position determining means 28 in the mounting mechanism 29.
Then, after removing the standard yoke 23, the correcting magnetic member 17 is attached. As the attachment mechanism 29, a robot or the like that operates according to the attachment position data output from the corrected position determination means 28 may be used.

Next, the operation of the above embodiment will be described.

When performing the adjustment work, first, the color cathode ray tube 11 to be adjusted is set at a predetermined adjustment position, that is,
It is mounted on a positioning mechanism 22 provided on the adjusting table 21 and fixed in position. At this time, the center of the tube axis of the color CRT 11 is set to match the centers of the standard yoke 23 and the socket 24 provided on the mounting mechanism 25.

Next, the mounting mechanism 25 is operated to operate the standard yoke.
The 23 and the socket 24 are slid to the left, and are attached to the predetermined positions of the positioned color CRT 11 as shown in FIG. After that, an image signal is applied to the color cathode-ray tube 11 from the adjustment pattern light emitting device 26 through the socket 24 to emit a predetermined adjustment pattern. The emitted adjustment pattern is detected by the optical sensor 27 arranged oppositely and is output to the correction position determining means 28. Further, the correction position determination means 28 compares the input adjustment pattern with a preset normal pattern, and determines the type and position of the correction magnetic member 17 for the color cathode-ray tube 11 from the difference between the normal pattern and the normal pattern. To do.

After that, the standard yoke 23 and the socket 24 are slid to the removal side, that is, to the right by the mounting mechanism 25, and the standard yoke 23 is completely separated from the outer surface of the color CRT 11 as shown in FIG. Move to. After removing the standard yoke 23, the mounting mechanism 29 is operated,
Correction magnetic member 17 determined by the correction position determination means 28
The corresponding correction magnetic member 17 is attached to the outer surface of the color cathode-ray tube 11 according to the type and the mounting position of the correction magnetic member 17.

At this time, on the outer surface of the color cathode-ray tube 11, an obstacle such as a standard yoke is stuck on the attaching work.
As shown in FIG. 1, all of 23 and the like are removed, so that the correcting magnetic member 17 can be easily attached to a predetermined position of the color CRT 11 and can be easily automated. In particular, it is not necessary to insert the correcting magnetic member 17 into the gap between the inside of the deflection yoke and the outer surface of the color cathode ray tube, and from this point as well, the efficiency of the attaching work can be improved. Further, the strip-shaped plastic plate 17a shown in FIG. 7 is unnecessary, and the correction magnetic member 17 can be unified into the shape shown in FIG.

After the completion of the correction work, a new deflection yoke, that is, a deflection yoke which should be originally attached to the color cathode ray tube 11 is attached to a predetermined position of the color cathode ray tube 11 and the adjustment operation is performed again. At this time, since the attachment of the correction magnetic member 17 necessary for the correction adjustment to the color cathode-ray tube 11 has been completed, a predetermined image quality can be obtained by adjusting only the attachment position of the deflection yoke. That is, the deflection yoke to be newly installed is usually a standard yoke.
Since there is no difference in characteristics with respect to 23, stable quality having a predetermined image quality can be secured only by adjusting the mounting position of the deflection yoke as described above.

In this way, the standard yoke 23 is attached to the color cathode-ray tube 11 for adjustment work, and the color cathode-ray tube 11 is attached.
After determining the mounting position of the correction magnetic member 17 with respect to, the standard yoke 23 is removed, the correction magnetic member 17 is mounted at the determined mounting position, so there is no standard yoke 23 that interferes with the mounting work. Thus, the correction magnetic member 17 can be attached and pasted, which facilitates the attachment and automation. Further, since the work of inserting the correction magnetic member 17 into the slight gap is eliminated, the members necessary for that, for example, the strip-shaped plastic plate 17a and the like are not required, and the manufacturing cost of the color CRT 11 can be reduced. Become.

Next, an image adjusting apparatus according to another embodiment will be described with reference to FIG.

In FIG. 3, a positioning mechanism 22 for positioning the color CRT 11 to be adjusted at a predetermined adjustment position.
As the above, a transfer device including a guide rail 31 and a tray 32 is used. Here, the tray 32 is a color cathode ray tube.
11 is held in the downward direction in the drawing, and the guide rail 31
The color CRT 11 is intermittently fed by a drive mechanism (not shown) to feed and position the color CRT 11 to a predetermined adjustment position. Further, the optical sensor 27 is provided upward so as to face the light emitting surface of the color CRT 11 positioned at a predetermined adjustment position in order to detect the image of the color CRT 11.

Further, the mounting mechanism 25 mounts the standard yoke 23 at a predetermined position of the color cathode-ray tube 11 at a predetermined adjustment position, and is vertically driven by the air cylinder 33 provided vertically. It is composed of a slide block 34. This slide block
The standard yoke 23 and the socket 24 are attached to the 34 in a predetermined positional relationship. Then, when the color cathode-ray tube 11 to be adjusted is positioned at a predetermined adjustment position, the slide block 34 is lowered by the air cylinder 33, and the standard yoke 23 and the socket 24 are attached to the predetermined position of the color cathode-ray tube 11. After the adjustment, the standard block 23 and the socket 24 are removed from the color cathode-ray tube 11 by raising the slide block 34 with the air cylinder 33.

Further, the adjustment pattern light emitting device 26 supplies an image signal to the color cathode-ray tube 11 having the standard yoke 23 mounted thereto through the socket 24 so that a predetermined adjustment pattern is emitted. Further, similarly, the correction position determining means 28 also compares the adjustment pattern detected by the optical sensor 27 with a preset normal pattern, and based on the difference from the normal pattern, the mounting position of the correction magnetic member 17 to the color cathode-ray tube 11. To decide.

Further, the mounting mechanism 29 is provided at a position downstream of the guide rail 31 adjacent to the mounting mechanism 25 and according to the mounting position determined by the correction position determining means 28, the color cathode-ray tube 11 after the standard yoke 23 is removed. Correcting magnetic member
17 is attached, and the robot 36 is used. This robot 36 has, for example, an arm 36a which can be moved to an arbitrary position by numerical control, and an adsorption head 33b which adsorbs and holds the correction magnetic member 17 is provided at the tip of this arm 36a. Further, 37 is a synchrotron, and this synchrotron 37 sequentially supplies the correcting magnetic members 17 in an aligned state.

Next, the operation of the above embodiment will be described.

First, the color cathode ray tube 11 mounted on the tray 32 is guided by the guide rail 31 by a drive mechanism (not shown).
The upper part is intermittently fed and positioned at a predetermined adjustment position facing the optical sensor 27.

Next, the air cylinder 33 is operated by a command from a control unit (not shown), the slide block 34 is lowered, and the standard yoke 23 and the socket 24 are mounted at predetermined positions of the color CRT 11. After that, the adjustment pattern light emitting device 26 operates to supply an image signal to the color cathode-ray tube 11 via the socket 24 to emit a predetermined adjustment pattern. This adjustment pattern is detected by the optical sensor 27 and compared with a preset normal pattern by the correction position determining means 28. Also, correction position determination means
Reference numeral 28 denotes a magnetic correction member 17 that compares the adjustment pattern from the optical sensor 27 with a normal pattern and attaches the correction pattern to the color cathode-ray tube 11 based on the difference between the adjustment pattern and the normal pattern.
And the mounting position of the correction magnetic member 17 are determined.
The detection time of the adjustment pattern by the optical sensor 27 is 5
It only takes a few seconds.

After determining the type and the mounting position of the above-mentioned correction magnetic member 17, the slide block 34 is raised by the air cylinder 33, and the standard yoke 23 and the socket 24 are removed from the color CRT 11. After that, the tray 32 is again intermittently fed on the guide rail 31, and the color CRT 11 is
The robot 36 is attached to the robot 36, that is, conveyed to a pasting position.

At this pasting position, the robot 36 sucks and holds the correction magnetic member 17 sequentially supplied by the synchrotron 37 by the suction head 33b, and moves the suction head 33b to the mounting position determined by the correction position determining means 28. The correction magnetic member 17 is attached to the color cathode ray tube 11 at this mounting position.

Although only one synchrotron 37 is shown in FIG. 3, a plurality of synchrotrons 37 may be provided depending on the type of the magnetic correction member 17. Further, a plurality of robots 36 may be provided and combined with a plurality of synchrotrons 37.

By repeating the above series of operations successively, the attachment of the correcting magnetic member 17 using the standard yoke 23 to the color CRT 11 is automatically completed. In this way, a new deflection yoke is attached to the color cathode ray tube 11 to which the correction magnetic member 17 has been attached, so that the color cathode ray tube 11 is attached to, for example, the inspection set shown in FIG. Then, a deflection yoke, which should be originally attached, is attached to the color cathode-ray tube 11 by an appropriate means, and the positioning is controlled at an optimum position.

Here, the newly installed deflection yoke has the same characteristics as the standard yoke 23, and the adjustment to the proper state is completed only by performing the positioning control as described above. If there is a characteristic difference between the newly installed deflection yoke and the standard yoke 26, the correction magnetic member 17
However, in general, there is almost no characteristic difference between the deflection yokes, and most color CRTs complete the adjustment without additionally attaching the magnetic correction member 17. Therefore, the image adjustment work of the color cathode-ray tube 11 is completed in a short time, and the stable high-quality color cathode-ray tube 11 is always provided with a constant good adjustment accuracy without depending on the skill level of the skilled worker. Obtainable.

In this way, the color cathode ray tube to be adjusted
Attach 11 to the tray 32 and move it on the guide rail 31,
After positioning at a predetermined adjustment position facing the optical sensor 27, the standard yoke 23 is attached to the color CRT 11.
At the same time, an image signal is supplied through the socket 24 to cause the adjustment pattern to emit light, which is detected by the optical sensor 27,
The correction position determination means 28 determines the mounting position of the correction magnetic member 17. After that, the standard yoke 23 and the socket 24 are removed from the color cathode-ray tube 11 and transported to the mounting position on the downstream side of the tray 32, and then the correction magnetic member 17 is attached to the determined mounting position by the mounting mechanism 29 by the robot 36. ,
Adjustment work is completed. For this reason, the series of adjustment work described above is automatically performed sequentially, and the adjustment time can be greatly shortened.
Productivity is improved. Further, it is possible to obtain a stable and high-quality color CRT 11 with a constant high adjustment accuracy.

[0045]

According to the method of adjusting an image of a cathode ray tube as set forth in claim 1, a standard deflection yoke is mounted at a predetermined position of the cathode ray tube to be adjusted, and the cathode ray tube is caused to emit a predetermined adjustment pattern to perform optical adjustment. The corrective pattern is detected by a sensor and compared with a preset normal pattern to determine the mounting position of the correction magnetic member with respect to the cathode ray tube. Since it is attached, an appropriate magnetic field distribution can be corrected within a short time without depending on the proficiency level of a skilled worker, and a cathode ray tube with a fine and high-quality image can be obtained.

According to the cathode ray tube image adjusting device of the second aspect, the cathode ray tube to be adjusted is positioned at a predetermined adjustment position by the positioning mechanism, and the deflection yoke is detachably mounted by the mounting mechanism. , A predetermined adjustment pattern is emitted from the pattern light emitting device on the cathode ray tube, the adjustment pattern detected by the optical sensor is compared with a preset normal pattern, and a magnetic member for correcting the cathode ray tube is corrected based on the difference from the normal pattern. The mounting position of is determined by the correction position determination means,
Since the correction magnetic member is attached according to the mounting position determined by the correction position determining means, it is possible to correct the magnetic field distribution appropriately in a short time without depending on the skill level of the skilled worker, and it is fine. A cathode ray tube with a high quality image can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an image adjusting device for a cathode ray tube according to an embodiment of the present invention before a standard deflection yoke is attached.

FIG. 2 is a side view showing a state in which a standard deflection yoke is installed after the attachment.

FIG. 3 is a perspective view showing another embodiment of the same.

FIG. 4 is a front view showing a conventional image adjusting apparatus.

FIG. 5 is a side view showing a state in which a correction magnetic member is attached to the cathode ray tube.

FIG. 6 is a perspective view showing the same magnetic member for correction.

FIG. 7 is a perspective view showing the same correction magnetic member.

[Explanation of symbols]

 11 Color cathode ray tube as a cathode ray tube 17 Magnetic member for correction 22 Positioning mechanism 23 Standard yoke that is a deflection yoke 25 Mounting mechanism 26 Adjustment pattern light emitting device 27 Optical sensor 28 Correction position determining means 29 Mounting mechanism

Claims (2)

[Claims] 1. A standard deflection yoke is mounted at a predetermined position of a cathode ray tube to be adjusted, and the cathode ray tube emits a predetermined adjustment pattern in a state where the deflection yoke is mounted, and the adjustment pattern is optically adjusted. It is detected by a sensor and compared with a preset normal pattern, the mounting position of the correction magnetic member to the cathode ray tube is determined from the difference from this normal pattern, and the standard is determined according to the determined mounting position. An image adjusting method for a cathode ray tube, characterized in that the correcting magnetic member is attached after removing the deflection yoke. 2. A positioning mechanism for positioning a cathode ray tube to be adjusted at a predetermined adjustment position, and a standard deflection yoke mounted at a predetermined position of the cathode ray tube at the adjustment position in a detachable state. A mounting mechanism, an adjustment pattern light-emitting device that causes the cathode ray tube to emit a predetermined adjustment pattern in the mounted state of the deflection yoke, and an optical sensor that faces the light emitting surface of the cathode ray tube and detects the emitted adjustment pattern. Correction position determining means for comparing the adjustment pattern detected by the optical sensor with a preset normal pattern, and determining the mounting position of the correction magnetic member with respect to the cathode ray tube from the difference from the normal pattern. According to the mounting position determined by the correction position determining means, the correction magnetic member is attached to the cathode ray tube from which the deflection yoke is removed. Image adjusting apparatus of a cathode ray tube, characterized in that it comprises a mounting mechanism for kicking.