JP3156569B2 - Static convergence adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static convergence adjusting device for an in-line type color CRT.

[0002]

2. Description of the Related Art Conventionally, as a method of adjusting a static convergence adjusting device, a method as described in "Modern Color Television Technology" (Ohm Co., pp. 208-209) is generally used. I have. FIG. 8 shows a static convergence adjusting device using the method. In FIG. 8, a cross hatch pattern signal is generated by an adjustment pattern generating means 101, the cross hatch pattern signal is input to a television set 102, and a cross hatch pattern image displayed on a cathode ray tube 103 in the television set is adjusted by an operator. In order to completely superimpose the images of the three colors (red, green, and blue) of the cross hatch at the center of the screen when viewed with the naked eye, two of the convergence adjusting magnets 104 use two quadrupole magnets to form red and blue. This is a method in which two 6-pole magnets are used to adjust green to red and blue.

[0003]

In this static convergence adjusting device, there is a problem that the movement of the image of the cross hatch with respect to the change in the setting of the convergence adjusting magnet is difficult to understand, and the adjustment can be performed only by a skilled operator. Therefore, there is a demand for a method of calculating an adjustment amount that can be adjusted even by an inexperienced worker, and that can realize automation of the adjustment.

The present invention provides a static convergence adjusting apparatus which is capable of giving an adjustment instruction that allows an inexperienced operator to make an adjustment, and a method of calculating an adjustment amount that can realize automatic adjustment. It is an object of the present invention to provide a static convergence adjusting device provided with the same.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides an adjustment target television set having an adjustment pattern.
An adjustment pattern generating means for displaying
CCD camera for photographing the surface of the CRT of a TV set
Camera and the signal output from the CCD camera
Misconvergence measuring means for measuring convergence
And the convergence adjusting magnet, the magnetic field it creates
Misconvergence when set to be weakest
By measuring the
Intrinsic misconvergence as an estimate of sconvergence
And the fixed misconvergence are stored.
Unique misconvergence storage means;
Sconvergence and the stored fixed misconvergence
The amount of adjustment and the magnitude and direction of deflection
Adjustment amount calculating means, the adjustment amount, and the magnitude and direction of the deflection
Adjustment instruction display means for giving an adjustment instruction to an operator based on the
The adjustment instructions are displayed so that even an unskilled worker can make adjustments, and the adjustment can be automated.

According to the present invention, a static convergence having a method of calculating an adjustment amount which realizes an adjustment instruction display so that even an inexperienced operator can make an adjustment, and which can also realize automation of the adjustment. An adjusting device is obtained.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention , an adjustment pattern is displayed on a television set to be adjusted.
Adjusting pattern generating means for adjusting the size of a television set to be adjusted
A CCD camera for photographing the surface of the set CRT,
Misconvert from the signal output from the CCD camera
Misconvergence measuring means for measuring presence
The verses adjustment magnet has the weakest magnetic field
To measure misconvergence when set to
By using the measured values, miscom
Estimator of eigenmisconvergence
Stage and a unique miss that stores the fixed misconvergence
Convergence storage means, and the measured misconvergence
From the stored fixed misconvergence
Adjustment amount and adjustment amount calculation to calculate the magnitude and direction of deflection
Means, based on the amount of adjustment and the magnitude and direction of deflection
Adjustment instruction display means for giving an adjustment instruction to the operator is provided.
The characteristic is that the characteristic misconvergence
Settings can be performed with simple operations, and
Displays adjustment instructions so that adjustments can be made even when there is
Has the effect of being able to.

[0008] The invention according to claim 2 provides the invention according to claim 1.
Unique mistake in the static convergence adjustment device
The convergence estimating means uses a convergence adjusting magnet.
The strength of the magnetic field to be formed is constant, and only the direction of the magnetic field changes.
Locus of misconvergence measurement value obtained when
The characteristic misconvergence is estimated from
The magnetic field formed by the convergence magnet
Unique misconvergence without changing the size of
Who is capable of estimating
Can also display adjustment instructions so that adjustments can be made
It has the action of

[0009] The invention described in claim 3 is the invention according to claim 1 or
In the static convergence adjusting device according to 2,
Turn the convergence adjusting magnet instead of the adjusting means.
Convergence adjustment magnet adjustment means
Unique convergence
Convergence Adjustment Magnet Adjusting Means Required for Estimation
Control is simple, and automation of the equipment and high adjustment accuracy are achieved.
Has the effect of being able to improve accuracy and reduce adjustment time
You .

The invention described in claim 4 is the invention according to claim 1 or
In the static convergence adjusting device according to 2,
The adjustment instruction display means includes an indicator for indicating the magnitude and direction of the deflection.
Indicator and its adjustment tolerance and convergence adjustment magnet
Displays the operating direction of the opening angle and rotation angle to change the stone
So that the indicator is within its adjustment tolerance
Instruct workers to
Adjustment instructions so that even a trader can make adjustments
Can be displayed. The departure according to claim 5
Akira is a static convergence adjusting device according to claim 4.
The magnitude and direction of the deflection of the adjustment instruction display means.
Direction indicator and its adjustment tolerance and converge
How to operate the opening angle and rotation angle to change the magnet
The direction is indicated for 4 pole magnet and 6 pole magnet
It is characterized by being displayed separately or simultaneously.
One of the magnets can be adjusted separately or simultaneously
It has the effect of

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 shows a static convergence adjusting device. In FIG. 1, reference numeral 101 denotes an adjustment pattern generating means for generating a convergence adjustment pattern, 102 denotes a television set to be adjusted, and 103 denotes an adjustment target. CRT 104, a convergence adjusting magnet for adjusting the convergence of the CRT, 105 a CCD camera for imaging the surface of the CRT, 106 a misconvergence measuring means for measuring the misconvergence from the output of the CCD camera, and 107 a misconvergence specific to the CRT. Specific misconvergence measuring means for measuring, 1
08 is a unique misconvergence storage means for storing data from the unique misconvergence measurement means, 109 is an adjustment amount calculation means for calculating the adjustment amount of the convergence adjustment magnet 104, and 110 is an output of the adjustment amount calculation means 109 to the operator 111. The adjustment instruction display means 111 to be transmitted is an operator.

The operation of the static convergence adjusting device configured as described above will be described.

First, the inherent misconvergence measuring means 1
07, an instruction to set the convergence adjusting magnet 104 so that the magnetic field generated by the convergence adjusting magnet 104 becomes the weakest (preferably 0) is given to the operator 111 by the adjustment instruction display means 110, and the adjustment pattern generating means 101 Is input to the television set 104, the adjustment pattern displayed on the surface of the cathode ray tube 102 is photographed by the CCD camera 105, and the misconvergence measuring means 106 is obtained from the video signal output from the CCD camera 105. And the misconvergence at that time is stored as the unique misconvergence in the unique misconvergence storage means 108.

Next, an adjustment pattern displayed on the surface of the cathode ray tube 102 is photographed by the CCD camera 105,
Misconvergence is measured from the video signal output from the CCD camera 105 by the misconvergence measuring means 106 and is adjusted by the adjustment amount calculating means 109 from the measured misconvergence and the unique misconvergence stored in the unique misconvergence storage means 108. An adjustment amount is calculated so that the color shift of the pattern on the CRT is reduced, and an adjustment instruction given to the operator is displayed by the adjustment instruction display means 110 based on the calculated adjustment amount, and the adjustment operator 111 is operated in accordance with the adjustment instruction. Adjust the convergence magnet 103. By repeating this operation,
It is configured to realize static convergence adjustment.

Next, the operation of the static convergence adjusting device will be described in further detail.

First, an adjustment pattern signal is generated by the adjustment pattern generating means 101 and the television set 102
Is input to FIG. 2 shows an example of the adjustment pattern. FIG. 2 shows an adjustment pattern in which the background is black and one white horizontal line and one white vertical line intersect at the center of the tube surface of the CRT. If they cross at the center of the plane, the number of horizontal and vertical lines is 2
The adjustment pattern may be more than one, or an adjustment pattern in which a white point is displayed at the center of the cathode ray tube surface instead of the intersecting straight line. The adjustment pattern may be any adjustment pattern that has a strong relationship with the later-described misconvergence measuring means 106 and can accurately measure misconvergence. The input to the television set 102 may be either an RF input or a video input. As for the television set 102, only a portion related to the static convergence adjustment is shown, and other portions are omitted.

Next, the adjustment instruction display means 110
For the adjustment operator 111, the convergence adjustment magnet 1
04 is displayed at a position where the magnetic field formed by the convergence adjusting magnet 104 becomes the weakest (preferably 0), and an instruction to set the convergence adjusting magnet 104 is displayed. 104 is set. The instructions given to the adjustment operator 111 include a message and a figure schematically representing the convergence adjustment magnet 104. When the magnetic field formed by the convergence adjusting magnet 104 is the weakest, the position is such that the different magnetic poles of the four-pole magnet pair and the six-pole magnet pair constituting the convergence adjusting magnet 104 overlap.

Next, the surface of the cathode ray tube 103 of the television set 102 on which the adjustment pattern is displayed is photographed by the color CCD camera 105, and the video signal is inputted to the misconvergence measuring means 106, and the misconvergence is measured. Is done. Regarding the method of calculating misconvergence, the video signal is separated into the three primary colors of red, green and blue, the position of the center of gravity in each image is calculated, and when calculating the misconvergence based on the green electron beam, red and green are calculated. The relative displacement of the center of gravity of the blue electron beam with respect to the center of gravity of the green electron beam is calculated, resulting in misconvergence of the red electron beam and misconvergence of the blue electron beam, respectively. This corresponds to a plot of the misconvergence of the red and blue electron beams on a two-dimensional plane with the origin of the center of gravity of the green electron beam, and the misconvergence is indicated by the coordinates of the plotted points. As described above, the convergence adjusting magnet 104 generates the weakest magnetic field formed by the convergence adjusting magnet 104 (0 if possible).
), The misconvergence of the red electron beam calculated by the misconvergence measuring means 106 is defined as the intrinsic misconvergence R0 (Rx0, Ry0) of the red electron beam, and the blue electron The beam misconvergence is defined as the intrinsic misconvergence B0 (Bx0, By0) of the blue electron beam.

Next, an electron beam having a misconvergence that matches the midpoint between the intrinsic misconvergence of the red electron beam and the intrinsic misconvergence of the blue electron beam is assumed, and the intrinsic misconvergence M0 (Mx
(0, My0) is calculated as (Equation 1).

[0020]

(Equation 1)

Thereafter, the actual adjustment work is started.
First, the TV set 1 on which the adjustment pattern is displayed
An image of the surface of the CRT 102 is taken by a color CCD camera 105, the video signal is input to a misconvergence calculation means 106, and misconvergence is calculated from the video signal. At this time, the misconvergence of the red electron beam is R (Rx, Ry), and the misconvergence of the blue electron beam is B (Bx, By).

FIG. 3 shows the state of deflection of each electron beam received by the quadrupole magnet and the hexapole magnet.
FIG. 3 shows that the electron beam emitted from the electron gun
The case where a convergence adjusting magnet 103 configured to be deflected by a pole magnet and then deflected by a quadrupole magnet is used is shown. In FIG. 3, the misconvergence when the red electron beam is deflected by only the six-pole magnet is R1 (Rx1, Ry).
1), and the misconvergence when the blue electron beam is deflected only by the six-pole magnet is B1 (Bx
1, By1), and the misconvergence when the virtual electron beam having the unique misconvergence M0 is deflected by only the six-pole magnet is M (Mx, My).
It is. Further, R1 and B1 are deflected by the quadrupole magnet to become R and B, respectively, and are measured by misconvergence of the red electron beam and misconvergence of the blue electron beam. A is an area indicating an allowable range of misconvergence.

Here, the vector R0R and the vector B0B
And the vector M0M correspond to the deflection by the six-pole magnet, and the vector R1R and the vector B1B correspond to the deflection by the four-pole magnet.

The vector R1R and the vector B1B have the same length and differ in directions by 180 degrees due to the deflection characteristics of the quadrupole magnet. On the other hand, due to the characteristics of the six-pole magnet, the vector R0R1 and the vector B0B1 have the same length and direction.

Further, since M0 is the midpoint between R0 and B0, and M is the midpoint between R and B and also the midpoint between R1 and B1, the vector M0M becomes the vector R0R
1 or the vector B0B1 has the same length and direction.

As can be seen from FIG. 3, the static convergence adjustment is to adjust the points R and B to the point G by adjusting two independent deflections by the 4-pole magnet and the 6-pole magnet. Means moving the points R and B within an area determined by the adjustment allowable range including the point G. That is, the parallelogram R1R0B0B1
Attention is focused on the method of matching the point M with the point G by the six-pole magnet and then matching the point R and the point B with the point M by the four-pole magnet, and the method of connecting the point R and the point B to the point M by the four-pole magnet. It can be seen that the adjustment can be made by either the method of matching the point M with the point G by using a six-pole magnet after the adjustment.

In the following description of the method of calculating the adjustment amount, the description will be made in the order of calculating the adjustment amount of the six-pole magnet and then calculating the adjustment amount of the four-pole magnet.
It is also possible to calculate the adjustment amount in the order of the 4-pole magnet and the 6-pole magnet.

Next, M (Mx, My), R1 (Rx1, Ry1) and B1 (Bx1, By1) shown in FIG. 3 are calculated based on (Equation 2).

[0029]

(Equation 2)

Next, the adjustment amount calculation means 109 calculates the inherent misconvergence R0, B0, and M0, the current misconvergence R and B, and the misconvergence R1 calculated from the virtual electron beam deflection. And B1
From M and M, the adjustment amount of the convergence adjustment magnet for the four-pole magnet and the adjustment amount for the six-pole magnet are calculated. The adjustment amounts for the four-pole magnet are θ4 for the opening angle and φ4 for the rotation angle. Similarly, the adjustment amounts for the six-pole magnet are θ6 for the opening angle and φ6 for the rotation angle. FIG. 4 shows the opening angle and the rotation angle of the 4-pole magnet and the 6-pole magnet.

The calculation of the adjustment amount of the six-pole magnet is performed by making the vector M0M in FIG. 3 coincide with the vector M0G. In order to match the vectors, we consider the length and direction of the vectors separately. The direction of the vector is represented by the angle formed by the vector and the x-axis.

First, the adjustment amount θ6 for the opening angle of the six-pole magnet is calculated by the following procedure.

First, the vector M0 is calculated based on (Equation 3).
The length L6 of M1 is calculated.

[0034]

(Equation 3)

Next, based on (Equation 4), the vector M0
The length L60 of G is calculated.

[0036]

(Equation 4)

Next, the adjustment amount θ6 for the opening angle of the six-pole magnet is calculated based on (Equation 5).

[0038]

(Equation 5)

Here, the meaning of θ6 is shown in (Table 1).

[0040]

[Table 1]

Next, the adjustment amount φ6 for the rotation angle of the six-pole magnet is calculated by the following procedure.

First, based on (Equation 6), the vector M0
The direction α6 of M is calculated.

[0043]

(Equation 6)

Next, based on (Equation 7), the vector M0
The direction α60 of G is calculated.

[0045]

(Equation 7)

Next, an adjustment amount φ6 for the rotation angle of the six-pole magnet is calculated based on (Equation 8).

[0047]

(Equation 8)

Here, the meaning of φ6 is shown in (Table 2).

[0049]

[Table 2]

The calculation of the adjustment amount of the four-pole magnet is performed by matching the vector R1R in FIG. 3 with the vector R1M and matching the vector B1B with the vector B1M. From the characteristics of the quadrupole magnet, when the vector R1R matches the vector R1M, the vector B1B matches the vector B1M. In order to match the vectors, we consider the length and direction of the vectors separately.

The adjustment amount θ4 for the opening angle of the quadrupole magnet is calculated by the following procedure. First, (Equation 9)
Is calculated based on the length L4r of the vector R1R.

[0052]

(Equation 9)

Next, based on (Equation 10), the vector B
The length L4b of 1B is calculated.

[0054]

(Equation 10)

Next, L4r and L4r are calculated based on (Equation 11).
The average value L4 of 4b is calculated.

[0056]

[Equation 11]

Next, based on (Equation 12), the vector R
A length L40 of 1M is calculated.

[0058]

(Equation 12)

Note that the length of the vector R1M and the vector R
Since the length of 0M0 is the same, L40 can also be calculated based on (Equation 13).

[0060]

(Equation 13)

Next, the adjustment amount θ4 for the opening angle of the quadrupole magnet is calculated based on (Equation 14).

[0062]

[Equation 14]

Here, the meaning of θ4 is shown in (Table 3).

[0064]

[Table 3]

Next, the adjustment amount φ4 for the opening angle of the quadrupole magnet is calculated by the following procedure.

First, based on (Equation 15), the vector R
An angle α4r formed by 1R with the x-axis is calculated.

[0067]

(Equation 15)

Next, based on (Equation 16), the vector B
An angle α4b that 1B forms with the x-axis is calculated.

[0069]

(Equation 16)

Next, based on (Equation 17), α4r and α4r
The average value α4 of 4b is calculated.

[0071]

[Equation 17]

Here, in (Equation 17), the direction of the vector R1R and the direction of the vector B1B differ from each other by 180 degrees due to the deflection characteristics of the quadrupole magnet.
(Pi) is added and then the average is calculated. next,
Based on (Equation 18), the direction α40 of the vector R0M0, which is the same direction as the vector R1M, is calculated.

[0073]

(Equation 18)

Next, the adjustment amount φ4 for the rotation angle of the quadrupole magnet is calculated based on (Equation 19).

[0075]

[Equation 19]

The meaning of θ4 is shown in (Table 4).

[0077]

[Table 4]

The adjustment amount θ6 for the opening angle of the six-pole magnet calculated as described above, the adjustment amount φ6 for the rotation angle of the six-pole magnet, the adjustment amount θ4 for the opening angle of the four-pole magnet, and the four-pole magnet The adjustment amount φ4 with respect to the rotation angle of R is the inherent misconvergence of R0 and B
0 and M0, and R and B, which are the current misconvergence
Adjustment instruction display means 11 together with misconvergence R1, B1, and M calculated from the deflection of the virtual electron beam.
0 is displayed, and an adjustment instruction given to the adjustment operator 111 is displayed. FIG. 5 shows an example of the adjustment instruction screen displayed by the adjustment instruction display means 110. In FIG. 5, the adjustment instruction screen is divided into a screen for a 4-pole magnet and a screen for a 6-pole magnet, which constitute the convergence adjustment magnet 103.
First, reference numeral 601 denotes an adjustment instruction screen for the four-pole magnet, 602 denotes an adjustment allowable range for the four-pole magnet, 603 denotes an indicator indicating the adjustment state of the four-pole magnet, and 604 denotes the opening angle of the four-pole magnet. 605 is an adjustment instruction for the rotation angle of the quadrupole magnet, and 606 is an auxiliary circle for adjusting the quadrupole magnet. On the other hand, reference numeral 621 denotes an adjustment instruction screen for the six-pole magnet,
The adjustment allowable range for the pole magnet is indicated by an indicator 623 indicating the adjustment state of the six-pole magnet.
Reference numeral 624 denotes an adjustment instruction for the opening angle of the six-pole magnet, 625 denotes an adjustment instruction for the rotation angle of the six-pole magnet, and 626 denotes an auxiliary circle for adjusting the six-pole magnet. 3 and FIG. 5, the indicator 603 includes (Equation 9) to (Equation 11) and (Equation 15) to
Calculated by (Equation 17), the size is L4 and the direction is α
4 and the radius of the auxiliary circle 606 is the vector R1M or the vector B1M or the vector R0M.
0 or equal to the magnitude of the vector B0M0, the indicator 623 corresponds to the vector M0M, and the radius of the auxiliary circle 626 is equal to the magnitude of the vector R0R1 or the vector B0B1 or the vector M0M.

Next, the adjustment operator 111 adjusts the opening angle and the rotation angle of the four-pole magnet and the six-pole magnet constituting the convergence adjustment magnet 103 according to the instruction displayed on the adjustment instruction display means 110.

The CC on the surface of the CRT 102 of the television set 104 on which the adjustment pattern is displayed as described above.
The processing from the photographing by the D camera 105 to the display of the instruction to the adjustment worker and the adjustment work of the adjustment worker are repeatedly executed until the misconvergence is within the adjustment allowable range.

Note that, in (Equation 11), L4r and L4
Although the average value L4 of b is calculated, one of L4r and L4b can be used as it is as L4.

In equation (16), α4r and (α
Although the average value α4 of (4b + π) is calculated, one of α4r and (α4b + π) can be directly used as α4.

Incidentally, if the misconvergence is measured before the convergence adjusting magnet 103 is set to the initial position and the adjustment state is determined, the television set whose misconvergence is within the allowable range without performing the adjustment can be used. It is efficient to avoid making unnecessary adjustments.

In FIG. 5, when the adjustment state of the four-pole magnet is within the allowable range, an adjustment instruction 604 for the opening angle of the four-pole magnet and an adjustment instruction 605 for the rotation angle of the four-pole magnet are displayed. When the adjustment state of the six-pole magnet is within the allowable range, an instruction 624 for adjusting the opening angle of the six-pole magnet is made.
If the display of the adjustment instruction 625 for the rotation angle of the six-pole magnet is not performed, the adjustment instruction screen is easy to see, which is effective in improving work efficiency.

In FIG. 5, if the level of skill of the adjustment operator in the adjustment device of the present invention increases, an adjustment instruction 604 for the opening angle of the quadrupole magnet and an adjustment instruction for the rotation angle of the quadrupole magnet are made. In some cases, it is not necessary to display the adjustment instruction 624 for the opening angle of the 605 and the six-pole magnet and the adjustment instruction 625 for the rotation angle of the six-pole magnet. If all or some of them are not displayed, the adjustment may be performed. The instruction screen is easy to see, which is effective in improving work efficiency.

In FIG. 5, a four-pole magnet and a six-pole magnet
For each of the pole magnet adjustment instructions, it is also possible to prioritize the opening angle adjustment instruction and the display at the time of rotation angle adjustment. For example, by giving priority to the display of the opening angle adjustment instruction over the display of the rotation angle adjustment instruction,
It can help the unskilled adjustment worker become proficient and is effective in training the adjustment worker.

In FIG. 5, the indicator 603 is used.
Is present in the vicinity of the adjustment allowable range 602 for the four-pole magnet, the vicinity of the adjustment allowable range 602 for the four-pole magnet is enlarged and displayed, and similarly, the indicator 623 indicates the adjustment allowable range for the six-pole magnet. 6
22 is displayed near the adjustment allowable range 622 for the six-pole magnet.
The adjustment instruction screen is easy to see, which is effective in improving work efficiency. At this time, the enlarged display may be switched to a normal screen, or may be displayed over the normal screen.

In FIG. 5, the radius of the auxiliary circle 606 is R, which is the current measured value of misconvergence.
And the size of the vector B0M0, it is desirable that the radius of the auxiliary circle 626 be the vector M0 for the same reason.
Although it is desirable to have a size of M, the adjustment is not impossible even when other selectable vectors are selected.

Here, the case where the estimation of the inherent misconvergence, the adjustment of the four-pole magnet, and the adjustment of the six-pole magnet are adjusted by one static convergence adjustment device has been described, but these three are connected by some communication means. Needless to say, the same adjustment can be realized by the separate adjustment device that is performed. In this case, the adjustment of the four-pole magnet and the six-pole magnet can be realized by a single adjustment device, and the adjustment of the four-pole magnet and the six-pole magnet can be separately performed by using a separate adjustment device only for estimating the inherent misconvergence. It can also be realized by the adjusting device.

(Embodiment 2) Compared with Embodiment 1, only the unique misconvergence estimating means is different. Therefore, the unique misconvergence estimating means will be described. In the following description, after adjusting the 4-pole magnet, 6
Although the description will be made in the order of adjusting the pole magnets, it is also possible to adjust the four-pole magnet after adjusting the six-pole magnet as in the case of the first embodiment.

First, estimation of the inherent misconvergence when adjusting the four-pole magnet will be described with reference to FIG. In the first embodiment, the specific misconvergence R0 and B0 are directly estimated, and the estimated R0 and B0 are estimated.
Using 0 and the midpoint M of the measured misconvergence R and B, calculate R1 and B1 required for the adjustment instruction display,
Adjustment instructions were displayed.

On the other hand, in the second embodiment, the rotation angle of the quadrupole magnet is changed while the opening angle of the quadrupole magnet of the convergence adjusting magnet 104 is kept constant (the whole magnet is rotated). ) From the trajectory of misconvergence measurement values R and B measured at the time, R1 or B1
Is estimated. When the adjustment of the deflection of the red electron beam by the quadrupole magnet is completed by the mechanism of the convergence adjusting magnet, the adjustment of the deflection of the blue electron beam by the quadrupole magnet is also completed at the same time.
The adjustment may be made for either one of the two. In this case, by assuming that the trajectory is a circle or an ellipse, the coordinates of R1 (or B1) can be estimated from the measured misconvergence, and an adjustment instruction similar to that of the first embodiment is displayed to perform adjustment. It can be carried out.

Next, the estimation of the inherent misconvergence when adjusting the six-pole magnet will be described with reference to FIG. In the first embodiment, the specific misconvergence R0 and B0 are directly estimated, and the estimated R0 and B0 are estimated.
0 midpoint M0 and measured misconvergence R and B
The adjustment instruction is displayed by using the midpoint M of.

On the other hand, in the second embodiment, the rotation angle of the six-pole magnet is changed while the opening angle of the six-pole magnet of the convergence adjusting magnet 104 is kept constant (the whole rotation is performed). M0) is estimated from the locus of the misconvergence measurement value measured at the time of ()). Also in this case, assuming that the trajectory is a circle or an ellipse, the coordinates of M0 can be estimated from the measured coordinates M of the midpoint between R and B. You can display and make adjustments.

[0095]

As described above, according to the present invention, in such a static convergence adjusting apparatus, it is possible to give an adjusting instruction to enable even an unskilled worker to make an adjustment, and to realize automatic adjustment. It is possible to provide a static convergence adjustment device provided with such an adjustment amount calculation method.

[Brief description of the drawings]

FIG. 1 is a block diagram of a static convergence adjusting device according to a first embodiment of the present invention;

FIG. 2 is a diagram showing a static convergence adjustment pattern according to the first embodiment;

FIG. 3 is a diagram showing deflection of an electron beam by a quadrupole magnet and a hexapole magnet according to the first embodiment;

FIG. 4 is a diagram showing an opening angle and a rotation angle of the 4-pole magnet and the 6-pole magnet of the first embodiment.

FIG. 5 is a diagram showing an adjustment instruction display screen according to the first embodiment;

FIG. 6 is a diagram showing a method for adjusting a four-pole magnet using the measured misconvergence trajectory according to the second embodiment;

FIG. 7 is a diagram showing a method for adjusting a six-pole magnet using the measured misconvergence trajectory according to the second embodiment;

FIG. 8 is a block diagram of a static convergence adjustment device using a conventional adjustment method.

[Explanation of symbols]

 101 Adjustment pattern generating means 102 Television set 103 CRT 104 Convergence adjusting magnet 105 CCD camera 106 Misconvergence measuring means 107 Unique misconvergence measuring means 108 Unique misconvergence storage means 109 Adjustment amount calculating means 110 Adjustment instruction display means 111 Adjustment worker 601 Adjustment instruction screen for 4-pole magnet 602 Adjustment allowable range 603 Indicator 604 Adjustment instruction (opening angle) 605 Adjustment instruction (rotation angle) 606 Auxiliary circle 621 Adjustment instruction screen for 6-pole magnet 622 Adjustment allowable range 623 Indicator 624 Adjustment instruction (Opening angle) ) 625 Adjustment instruction (rotation angle) 626 Auxiliary circle

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaaki Ishizaka 4-3-1 Tsunashima, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Matsushita Communication Industrial Co., Ltd. (56) References JP-A-2-58487 (JP, A) ( 58) Surveyed fields (Int.Cl. ⁷ , DB name) H04N 17/00-17/06

Claims (5)

(57) [Claims] 1. A adjustment pattern generating means for displaying an adjustment pattern on the adjustment target of the television set, CCD for photographing the CRT tube face of the television set of the adjustment target
A camera, a misconvergence measurement means for measuring a misconvergence from a signal output from the CCD camera, the convergence adjusting magnet, by measuring the misconvergence when it magnetic field formed was set to weakest , a unique misconvergence estimating means for the measured value and the estimated value of misconvergence in a cathode ray tube itself, the fixed misconvergence and specific misconvergence storage means for storing Nsu, the measured misconvergence and the stored fixed mistakes Adjustment amount calculating means for calculating the adjustment amount and the magnitude and direction of the deflection from the convergence; and the adjustment amount and the magnitude and direction of the deflection.
Adjusting instruction display means for giving the operator an adjustment instruction based on direction
Static convergence characterized by the provision of
Adjustment device. 2. A specific misconvergence estimating means, and the intensity of the magnetic field formed by the convergence adjusting magnet is constant, the locus of the measured values of misconvergence obtained when changing only the direction of the magnetic field, the inherent misconvergence The static convergence adjustment device according to claim 1, wherein the estimation is performed. Instead of wherein adjusting means, claim and further comprising a convergence adjusting magnet adjusting means capable of rotating the convergence adjusting magnet 1 or 2
The described static convergence adjusting device. 4. The apparatus according to claim 1 , wherein the adjustment instruction display means is configured to control the magnitude of the deflection
And direction indicators and their adjustment tolerances and converters
Control of the opening angle and rotation angle of the
The direction of operation is displayed, and the indicator
Requesting a worker to enter
Item 1. The static convergence adjusting device according to item 1 or 2.
Place. 5. The magnitude of the deflection of the adjustment instruction display means,
Direction indicator and its adjustment tolerance and conversion
Operation of opening angle and rotation angle to be changed for the sense magnet
The direction is displayed for 4 pole magnet and 6 pole magnet
Are displayed separately or simultaneously.
Star Tech convergence adjustment equipment described.