JP3344329B2 - Landing adjustment method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a landing adjustment method and apparatus for a color CRT.

[0002]

2. Description of the Related Art Conventionally, a landing adjustment device used for adjusting the landing of a color cathode ray tube is disclosed in Japanese Patent Application Laid-Open No. 64-12445. The landing adjustment device disclosed in the publication includes beam orbit deflecting means for applying an electric field or a magnetic field from the outside of the color cathode ray tube to forcibly change the trajectory of the electron beam, and the beam adjustment device arranged at a peripheral portion of the color cathode ray tube. A plurality of detectors for detecting an irradiation state of the electron beam whose orbit is changed by the orbital deflecting means on the phosphor in the color cathode ray tube, and a landing for measuring a landing state of the color cathode ray tube by receiving signals from these detectors The landing adjustment is performed by moving a deflection yoke and a purity adjustment magnet (purity magnet) provided on the color cathode ray tube based on the measurement result of the measurement means and the landing measurement means.

[0003]

The above-mentioned conventional landing adjustment device describes a method of calculating an adjustment amount to be applied to a purity adjustment magnet when performing a horizontal landing amount adjustment. It is disclosed that the same adjustment is performed when performing the adjustment. However, since the actual purity adjustment magnet has two degrees of freedom of the opening angle and the rotation angle, the calculation method of the adjustment amount is different from the horizontal direction and the vertical direction. There was a problem that the total of two adjustment amounts calculated for each direction could not be applied to the opening angle and rotation angle of the purity adjusting magnet.

According to the present invention, it is possible to correctly adjust the opening angle and the rotation angle of the purity adjusting magnet based on the horizontal and vertical landing amounts, and to give an accurate adjustment instruction to the operator and perform the adjustment. An object of the present invention is to provide a landing adjustment device that can be automated.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention is to perform a landing adjustment using an adjustment amount obtained from a landing amount unique to a single cathode ray tube, and is an inexperienced worker. This is also configured to realize display of an adjustment instruction so that adjustment can be performed, and also to realize automation of adjustment.

According to the present invention, there is provided a landing adjustment device which realizes an adjustment instruction display so that even an unskilled worker can make an adjustment, and which can also realize an automatic adjustment.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, the surface of a cathode ray tube of a television set to be adjusted is set to CC.
An image is taken with a D camera, and the relative position of the center of gravity of the electron beam with respect to the center of gravity of the green phosphor of the cathode ray tube is measured as a landing amount, and the landing angle is adjusted by adjusting the opening angle and the rotation angle of the purity adjusting magnet. in the method, the purity of the landing amount when the magnetic field adjusting magnet is formed was set to weakest stored as specific landing amount of CRT alone, the unique landing amount of the stored, purity than the landing amount measured Adjust the opening angle and rotation angle of the adjusting magnet
It is characterized in that each is calculated and an adjustment instruction is given to a worker based on the calculated adjustment amount, so that the adjustment amount can be accurately and easily obtained, and even an unskilled worker can make adjustments. It has the effect that it can be performed efficiently.

[0008]

[0009] According to a second aspect of the invention, the landing adjustment method according to claim 1, specific landing amount
Is to estimate the specific landing amount from the locus of the measured landing amount obtained when only the direction of the magnetic field is changed while keeping the strength of the magnetic field formed by the purity adjustment magnet constant. It has the effect that it can be easily obtained.

[0010]

[0011] The invention described in claim 3 is the landing adjustment method according to claim 1, adjustment measure landing adjustment from the adjustment amount, open the purity adjusting magnet by figure schematically representing the purity adjusting magnet It displays the adjustment amount for the angle and the rotation angle, and has the effect that even an inexperienced operator can display an accurate adjustment index to perform the adjustment efficiently.

According to a fourth aspect of the present invention, there is provided an adjustment pattern generating means for displaying an adjustment pattern on a television set to be adjusted, a CCD camera for photographing the surface of a cathode ray tube of the television set to be adjusted, and a CCD camera. Landing amount measuring means for measuring the relative position of the center of gravity of the electron beam with respect to the center of gravity of the green phosphor of the cathode ray tube as a landing amount from a signal output from the cathode ray tube, and a purity adjusting magnet so that the magnetic field formed by the magnet is the weakest. The relative position of the center of gravity of the electron beam with respect to the center of gravity of the green phosphor of the cathode ray tube is set as a landing amount, and a unique landing amount estimating means for estimating a landing amount of the cathode ray tube alone, and a unique landing amount are stored. Unique landing amount storage means for storing the measured landing amount Purifying from the unique landing amount you are
Calculate the adjustment amount of the opening angle and rotation angle of the tee adjustment magnet respectively
And an adjustment instruction display means for giving an adjustment instruction to the operator based on the adjustment amount.The estimation of the specific landing amount can be accurately performed by a simple operation, and the This has the effect that even a worker can make adjustments efficiently by displaying accurate adjustment instructions.

According to a fifth aspect of the present invention, in the landing adjustment device according to the fourth aspect, the intrinsic landing amount estimating means makes the intensity of the magnetic field formed by the purity adjusting magnet constant and changes only the direction of the magnetic field. Estimating the unique landing amount from the trajectory of the measured value of the landing amount obtained at the time of the estimation, and accurately estimating the unique landing amount without changing the magnitude of the magnetic field formed by the purity adjusting magnet In addition, there is an effect that even an unskilled worker can efficiently perform adjustment by displaying an accurate adjustment instruction.

According to a sixth aspect of the present invention, in the landing adjustment device of the fourth aspect , the adjustment instruction display means comprises:
Based on the amount of adjustment, the landing adjustment adjustment index is
This figure instructs the adjustment amount for the opening angle and the rotation angle of the purity adjustment magnet with a figure that schematically represents the purity adjustment magnet, and is capable of accurately estimating the specific landing amount and is an inexperienced worker. However, by displaying an accurate adjustment instruction, the adjustment can be performed efficiently.

The invention according to claim 7 is the invention according to claim 4 or
5. The landing adjustment device according to claim 5, further comprising a purity adjustment magnet adjustment means capable of rotating the purity adjustment magnet, instead of the adjustment instruction display means, wherein the purity adjustment magnet required for estimating the unique landing amount is provided. This has the effect that the control of the adjusting means is simple, and that it is possible to automate the apparatus, increase the adjustment accuracy, and reduce the adjustment time.

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows a configuration diagram of a landing adjustment device according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 101 denotes an adjustment pattern generating unit that generates a pattern for purity adjustment, 102 denotes a television set to be adjusted, 103 denotes a cathode ray tube to be adjusted, 104 denotes a purity adjustment magnet that adjusts the purity of the cathode ray tube 103, and 105 denotes a purity adjustment magnet. CCD camera for imaging CRT surface, 1
06 is a landing amount measuring means for measuring the landing amount from the output of the CCD camera 105, 107 is a unique landing amount measuring means for measuring the landing amount unique to the cathode ray tube, and 108 is a unique landing storing data from the unique landing amount measuring means 107. Quantity storage means, 1
Reference numeral 09 denotes an adjustment amount calculation unit that calculates the adjustment amount of the purity adjustment magnet 104, 110 denotes an adjustment instruction display unit that transmits the output of the adjustment amount calculation unit 109 to the operator 111, and 111 denotes an operator.

The operation of the thus configured landing adjustment device will be described below.

First, prior to the adjustment, the purity adjustment magnet 104 is measured by the intrinsic landing amount measuring means 107.
Is given to the operator 111 by the adjustment instruction display means 110 so that the magnetic field generated by the instruction is set to 0 or the weakest. The adjustment pattern output from the adjustment pattern generating means 101 is input to the television set 104, and the adjustment pattern displayed on the surface of the cathode ray tube 102 is photographed by the CCD camera 105.
The landing amount is measured by the landing amount measuring unit 106 from the video signal output from the unit 05, and the landing amount at that time is stored in the unique landing amount storage unit 108 as the unique landing amount.

Next, the landing amount measuring means 106
The adjustment pattern displayed on the surface of the cathode ray tube 102 is photographed by the CCD camera 105, and the CCD camera 105
The landing amount is measured from the video signal output from the device. The adjustment amount calculation means 109 calculates the adjustment amount based on the landing amount measured by the landing amount measurement means 106 and the unique landing amount stored in the unique landing amount storage means 108 so that the adjustment pattern has less color unevenness on the CRT. Is calculated.

The adjustment instruction display means 110 displays an adjustment instruction given to the worker 111 based on the adjustment amount calculated by the adjustment amount calculation means 109. The adjustment operator 111 adjusts the purity magnet 103 according to the adjustment instruction.

By repeating this operation, a landing adjustment is realized.

Next, the operation of the landing adjustment device will be described in more detail. First, an adjustment pattern signal is generated by the adjustment pattern generation means 101 and input to the television set 102. FIG. 2 shows an example of the adjustment pattern. FIG. 2 shows an adjustment pattern that is entirely green. The input to the television set 102 may be either an RF input or a video input. Note that, with respect to the television set 102, only a portion related to the landing adjustment is shown, and other portions are omitted.

Next, the adjustment instruction display means 110 provides the adjustment worker 111 with the purity adjustment magnet 1.
04 is displayed at a position where the magnetic field formed by the purity adjustment magnet 104 is zero or weakest, and an instruction to set the purity adjustment magnet 104 is displayed, and the adjustment operator 111 sets the purity adjustment magnet 104. You. The instruction given to the adjustment operator 111 includes a message, a figure schematically representing the purity adjustment magnet 104, and the like. When the magnetic field formed by the purity adjusting magnet 104 is zero or weakest, the position is such that different magnetic poles of the two-pole magnet pair forming the purity 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 input to the landing amount measuring means 106 to measure the landing amount. Is done. Regarding the method of measuring the landing amount, as shown in the conventional example, the relative position of the center of gravity of the cross section of the green electron beam with respect to the center of gravity of the green phosphor of the CRT is measured, and the center of gravity of the green phosphor is defined as the origin. This corresponds to a plot of the relative position of the green electron beam on the two-dimensional plane, and the landing amount is indicated by the coordinates of the plotted point. In the state where the purity adjusting magnet is set at a position where the magnetic field formed by the purity adjusting magnet 104 is zero or the weakest as described above, the landing amount of the green electron beam calculated by the landing amount measuring unit 106 is determined. Specific landing amount G0 of green electron beam
(Gx0, Gy0).

Thereafter, the actual adjustment work is started.
First, the TV set 1 on which the adjustment pattern is displayed
The surface of the CRT 102 is photographed by the color CCD camera 105, and the video signal is input to the landing amount calculation means 106, and the landing amount is calculated from the video signal. At this time, the landing amount of the green electron beam is G (Gx, Gy).

FIG. 3 shows how the green electron beam is deflected by the purity adjusting magnet 104. FIG.
5 shows a case where the electron beam emitted from the electron gun is deflected from the point GO (Gx0, Gy0) to the point G (Gx, Gy) by the purity adjusting magnet 104. A region indicated by a dashed line is a region indicating the allowable range 302 of the landing amount. Note that the vector G0
G corresponds to deflection by the purity adjusting magnet 104.

As can be seen from FIG. 3, the landing adjustment is to match the point G with the origin O by adjusting the deflection by the purity adjusting magnet 104. Usually, the landing adjustment is performed within the adjustment allowable range 302 including the origin O. Moving the point G into the determined area.

Next, an adjustment amount for the purity adjustment magnet 104 is calculated by the adjustment amount calculating means 109 from G0, which is the specific landing amount, and G, which is the current landing amount. The adjustment amount for the purity adjustment magnet 104 is an adjustment amount θ for the opening angle and an adjustment amount φ for the rotation angle. FIG. 4 shows the opening angle and the rotation angle of the purity adjusting magnet 104.

The adjustment amount of the purity adjusting magnet 104 is calculated by making the vector G0G (304) in FIG. 3 coincide with the vector G0O (305). 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 θ for the opening angle of the purity adjusting magnet 104 is calculated by the following procedure.

First, based on (Equation 1), the vector G0G
Is calculated.

[0032]

(Equation 1)

Next, based on (Equation 2), the vector G0
The length L0 of O is calculated.

[0034]

(Equation 2)

Next, the adjustment amount θ for the opening angle of the purity adjusting magnet is calculated based on (Equation 3).

[0036]

(Equation 3)

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

[0038]

[Table 1]

Next, an adjustment amount φ with respect to the rotation angle of the purity adjustment magnet is calculated by the following procedure.

First, based on (Equation 4), the vector G0
The direction α of G is calculated.

[0041]

(Equation 4)

Next, based on (Equation 5), the vector G0
The direction α0 of O is calculated.

[0043]

(Equation 5)

Next, an adjustment amount φ with respect to the rotation angle of the purity adjustment magnet is calculated based on (Equation 6).

[0045]

(Equation 6)

Here, the meaning of φ is shown in (Table 2). Note that the rotation direction of the adjustment instruction may be reversed depending on the setting of the direction of the coordinate axis at the time of measurement and the structure of the purity adjustment magnet.

[0047]

[Table 2]

The adjustment amount θ with respect to the opening angle of the purity adjustment magnet and the adjustment amount φ with respect to the rotation angle of the purity adjustment magnet calculated as described above are determined together with the specific landing amount G0 and the current landing amount G. An adjustment instruction input to the adjustment instruction display means 110 and 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, first, reference numeral 501 denotes an adjustment allowable range for the purity adjustment magnet, 502 denotes an indicator indicating the adjustment state of the purity adjustment magnet, 503 denotes an adjustment instruction for the opening angle of the purity adjustment magnet, and 504 denotes an adjustment instruction. This is an adjustment instruction for the rotation angle of the purity adjustment magnet, and reference numeral 505 is an auxiliary circle for adjusting the purity adjustment magnet. 3 and FIG. 5, the indicator 502 is calculated by (Equation 1) to (Equation 6), corresponds to a vector whose size is L and whose direction is α, and the radius of the auxiliary circle 505 is It is equal to the magnitude of the vector G0O.

Next, the adjustment operator 111 adjusts the opening angle and the rotation angle of the purity adjustment magnet 103 in accordance with the instructions 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 landing amount falls within the allowable adjustment range.

It should be noted that the adjustment index of the landing adjustment can be made to correspond to the actual purity adjustment magnet by displaying the adjustment amount of the opening angle and the rotation angle of the purity adjustment magnet by a figure schematically representing the purity adjustment magnet. Even an inexperienced worker can perform the adjustment efficiently by displaying an accurate adjustment instruction.

Before the adjustment is started, the landing amount is measured and the adjustment state is determined. If the adjustment is not performed, the TV set whose landing amount is within the allowable range can be subjected to unnecessary adjustment. It is efficient to avoid doing.

In FIG. 5, if the level of skill of the adjusting operator of the adjusting device of the present invention increases, the adjusting instruction 503 for the opening angle of the purity adjusting magnet and the adjusting instruction for the rotation angle of the purity adjusting magnet are made. In some cases, there is no need to display 504, and if all or some of them are not displayed, the adjustment instruction screen becomes easy to see, which is effective in improving work efficiency.

In FIG. 5, the indicator 502
Is present in the vicinity of the adjustment allowable range 501, if the vicinity of the adjustment allowable range 501 is enlarged and displayed, the adjustment instruction screen becomes 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, since the radius of the auxiliary circle 606 is not affected by G, which is the current measurement value of the landing amount, it is desirable to use the magnitude of the vector G0G. The adjustment is not impossible even if the possible vectors are selected.

The specific landing amount estimating means 107
May be obtained as follows. In the above description, the specific landing amount G0 is directly estimated, and the adjustment instruction is displayed using the estimated G0. However, the rotation of the purity adjustment magnet 104 is maintained while the opening angle of the purity adjustment magnet 104 is kept constant. The specific landing amount G0 is estimated from the locus of the measured value G of the landing amount measured when the angle is changed (the whole is rotated).

In this case, by assuming that the trajectory is a circle or an ellipse, the coordinates of G0 can be estimated from the measured landing amount. Therefore, an adjustment instruction similar to that described above is displayed to perform the adjustment. Can be.

(Embodiment 2) FIG. 6 shows a configuration diagram of a landing adjustment device according to Embodiment 2 of the present invention.

In the second embodiment, instead of the adjustment instruction display means 110 of the landing amount adjustment means of the first embodiment,
This is a landing amount adjustment device provided with a purity adjustment magnet adjustment unit 601 capable of rotating the purity adjustment magnet 104, and a purity adjustment magnet adjustment unit different from that of the first embodiment will be described. The control of the purity adjustment magnet adjustment means required for estimating the intrinsic landing amount is simple, and the apparatus can be automated, the adjustment accuracy can be increased, and the adjustment time can be reduced.

The purity adjusting magnet adjusting means 601 will be described with reference to FIG. First, as shown in FIG. 7, the shape of the two-pole magnet 701 is ring-shaped, so that teeth are provided on the outer periphery of the two-pole magnet 701 to form a gear. Next, a driving gear 702 is engaged with the two-pole magnet 701 from outside by a worker or a robot, and the driving gear is rotated by using the driving motor 703 to control the driving motor 703. By instructing the control circuit 704 on the adjustment angle 705, the purity magnet can be arbitrarily rotated. Since the purity magnet is composed of two bipolar magnets, the configuration shown in FIG. 7 may be provided for each bipolar magnet.

The angle to be given to the driving gear at this time will be described with reference to FIG. For convenience, the two purity magnets are referred to as a two-pole magnet A801 and a two-pole magnet B802, respectively. The adjustment angle A for the two-pole magnet A 801 and the adjustment angle B for the two-pole magnet B 802 are given by the following equations.

[0063]

(Equation 7)

[0064]

As described above, according to the present invention, an accurate adjustment amount can be obtained by using an adjustment amount obtained from a unique landing amount of a CRT alone, and an accurate adjustment instruction can be given to an operator. Can be effectively adjusted even by an unskilled worker.

Further, it is possible to provide a landing adjustment device capable of realizing automatic adjustment.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a landing adjustment device according to a first embodiment of the present invention.

FIG. 2 is a view showing a landing adjustment pattern according to the first embodiment;

FIG. 3 is a view showing deflection of an electron beam by a purity adjusting magnet according to the first embodiment.

FIG. 4 is a diagram showing an opening angle and a rotation angle of the purity adjusting magnet according to the first embodiment;

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

FIG. 6 is a configuration diagram of a landing amount adjusting device according to a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a purity adjusting magnet adjusting unit according to the second embodiment.

FIG. 8 is a view for explaining an opening angle and a rotation angle of the two-pole magnet according to the second embodiment;

[Explanation of symbols]

 101 Adjustment pattern generating means 102 Television set 103 CRT 104 Purity adjustment magnet 105 CCD camera 106 Landing amount measuring means 107 Unique landing amount measuring means 108 Unique landing amount storing means 109 Adjustment amount calculating means 110 Adjustment instruction display means 111 Adjustment worker 302 Allowable range 401 Opening angle 402 Rotation angle 403 Two-pole magnet 501 Adjustable tolerance range 502 Indicator 503 Adjustment instruction (Opening angle) 504 Adjustment instruction (Rotation angle) 505 Auxiliary circle 601 Purity adjusting magnet adjusting means 701 Two-pole magnet (with teeth) 702 Driving gear 703 Driving motor 704 Driving motor control circuit 705 Adjusting angle 801 2-pole magnet A 802 2-pole magnet B 803 Adjusting angle A 804 Adjusting angle B

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-64-12445 (JP, A) JP-A-63-298938 (JP, A) JP-A-1-232640 (JP, A) JP-A-2- 234591 (JP, A) JP-A-3-254044 (JP, A) JP-A-5-21040 (JP, A) JP-A-10-248074 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 9/44 H04N 17/04 H04N 9/28

Claims (7)

(57) [Claims] An image of a cathode ray tube of a television set to be adjusted is photographed by a CCD camera, and a relative position of a center of gravity of an electron beam with respect to a center of gravity of a green phosphor of the cathode ray tube is measured as a landing amount, and a purity adjustment magnet is measured. In the method of adjusting the landing amount by adjusting the opening angle and the rotation angle of the CRT, the landing amount when the magnetic field formed by the purity adjusting magnet is set to be the weakest is stored as the unique landing amount of the cathode ray tube alone. , The opening angle and the rotation angle of the purity adjusting magnet from the stored specific landing amount and the measured landing amount.
A landing adjustment method for calculating an adjustment amount of each of the above, and providing an adjustment instruction to an operator based on the calculated adjustment amount. 2. The intrinsic landing amount is estimated from a locus of a measured value of the landing amount obtained when the intensity of the magnetic field formed by the purity adjusting magnet is fixed and only the direction of the magnetic field is changed. 2. The landing adjustment method according to claim 1, wherein: 3. The adjustment index of the landing adjustment based on the adjustment amount indicates an adjustment amount with respect to the opening angle and the rotation angle of the purity adjustment magnet by a figure schematically representing the purity adjustment magnet. The landing adjustment method described. 4. An adjustment pattern generating means for displaying an adjustment pattern on a TV set to be adjusted, a CCD camera for photographing the surface of a cathode ray tube of the TV set to be adjusted, and a signal output from the CCD camera. The cathode ray tube when the landing amount measuring means for measuring the relative position of the center of gravity of the electron beam with respect to the center of gravity of the green phosphor of the cathode ray tube as a landing amount, and the purity adjusting magnet is set so that the magnetic field formed by the magnet is weakest. A unique landing amount estimating unit that sets a relative position of the center of gravity of the electron beam with respect to the center of gravity of the green phosphor as a landing amount, and an estimated value of the landing amount of the cathode ray tube alone; and a unique landing amount storage unit that stores the unique landing amount. , Measured landing amount and stored unique landing amount Opening angle of the purity adjustment magnet from
A landing adjustment device comprising: an adjustment amount calculation unit for calculating an adjustment amount of the rotation angle; and an adjustment instruction display unit for giving an adjustment instruction to an operator based on the adjustment amount. 5. An estimating means for estimating a specific landing amount based on a locus of a measured value of the landing amount obtained when only the direction of the magnetic field is changed while the intensity of the magnetic field formed by the purity adjusting magnet is kept constant. The landing adjustment device according to claim 4, wherein 6. An adjustment instruction display unit instructs an adjustment amount for an opening angle and a rotation angle of the purity adjustment magnet as a landing adjustment adjustment index based on the adjustment amount by using a figure schematically representing the purity adjustment magnet. The landing adjustment device according to claim 4, wherein: 7. The apparatus according to claim 4, further comprising a purity adjusting magnet adjusting means capable of rotating the purity adjusting magnet in place of the adjusting instruction displaying means.
A landing adjustment device as described.