JP2004127638A - Color selection electrode support mounting positioning device and color selection electrode support mounting positioning method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color selection electrode support mounting positioning device and a mounting positioning method using the same in which, even if the shape of the color selection electrode has distortion, the color selection electrode can be controlled in an appropriate posture by a simple method. <P>SOLUTION: The color selection electrode support stands 31-34 support the color selection electrode 1 at four support points P1, P2, P3 and P4, but since the shape of the color selection electrode is distorted, the color selection electrode 1 and the color selection electrode support stands 3 do not contact with each other at the support point P4. Then, when a color selection electrode movable support part 4 is moved toward a z direction, the color selection electrode 1 rotates around line segments P1-P3 as an axis, and soon the support point P4 and the color selection electrode 1 contact. When the color selection electrode movable support part 4 is stopped here, the line segments P1-P3 are kept in parallel positions with line segments P2-P4. That is, the color selection electrode 1 is controlled in a posture in which its distortion is averaged. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cathode ray tube, and more particularly, to attaching a support member to a color selection electrode used in a color cathode ray tube.
[0002]
[Prior art]
The structure of a conventional general color cathode ray tube will be described. The color cathode ray tube includes a panel, a phosphor screen having phosphors corresponding to three colors of R, G and B, an electron gun for irradiating electron beams corresponding to three colors of R, G and B, and a predetermined curvature. And a color selection electrode for selecting an electron beam to a predetermined position on the phosphor screen. The phosphor is applied on the inner surface of the panel. The color selection electrode is attached to the inner surface of the panel by an elastic color selection electrode support member at a predetermined distance Q from the panel, and a slit for passing an electron beam is opened. The inner surface of the color selection electrode where the slit is formed is called a color selection electrode element surface.
[0003]
For example, Patent Document 1 discloses a positioning device for mounting a support member to a color selection electrode for a color cathode ray tube. The mounting and positioning device includes a color selection electrode support base, a color selection electrode positioning means, a color selection electrode positioning reference point, a color selection electrode attitude control actuator, a color selection electrode height measurement means, and a color selection electrode support member. A moving actuator. The color selection electrode support supports the color selection electrodes at three points, and a plane formed from these three points becomes a reference plane. The color selection electrode positioning means moves the color selection electrode supported by the color selection electrode support base in a horizontal direction to a reference plane by pressing with an air actuator or the like, and presses the color selection electrode positioning reference point to a position in the horizontal direction. Determine the coordinates. The color selecting electrode height measuring means measures the height of the color selecting electrode element surface whose horizontal coordinate is determined by the color selecting electrode positioning means. The height of the color selection electrode element surface is an element for determining the interval Q. This color selection electrode height measuring means measures the height by moving the measuring element in the height direction and measuring the moving distance until it comes into contact with the color selection electrode and stops, thereby measuring the height. And measuring the height of the element surface of the color selection electrode at a plurality of points of the color selection electrode.
[0004]
From the measurement result of the height of the color selection electrode body surface, the average plane shape of the color selection electrode body surface is calculated. Also, the average shape of the inner surface of the panel to be combined with the color selection electrode is calculated separately. Then, the attitude of the color selection electrode is determined by moving the three color selection electrode support bases by the color selection electrode attitude control actuator so that the distance from the panel becomes Q, and the attitude is maintained. Thereafter, the color selection electrode support member is moved by the color selection electrode support member moving actuator, and the color selection electrode support member mounting position is determined on the outer periphery of the color selection electrode. Here, the determined color selection electrode support member attachment position is a position where the panel pin bonded to the inner surface of the panel fits into the reference hole formed in the color selection electrode support member.
[0005]
[Patent Document 1]
US Pat. No. 5,692,941 [0006]
[Problems to be solved by the invention]
The mounting and positioning method using the conventional positioning device for mounting the support member on the color selection electrode measures the height of the element body surface of the color selection electrode supported by the three color selection electrode support bases as described above. Based on the shape of the panel inner surface measured separately, the support for the color selection electrode attitude control actuator is moved so that the distance between the color selection electrode and the panel becomes Q, and then the color selection electrode support member mounting position Had been decided.
[0007]
Therefore, when the points of the four corners of the color selection electrode are not on the same plane, that is, in a twisted positional relationship, the distance between the color selection electrode and the panel is set to Q so that the rectangular coordinates are required. It is necessary to correct the rotation direction based on the measurement results of the system. For this reason, there has been a problem that the calculation becomes complicated or an error increases.
[0008]
The present invention has been made in order to solve the above problems, and even when the shape of the color selection electrode is twisted, it is possible to control the color selection electrode to an appropriate posture by a simple method. It is an object of the present invention to provide a color selection electrode support member mounting and positioning device and a color selection electrode support member mounting and positioning method using the same.
[0009]
[Means for Solving the Problems]
The color selection electrode support member mounting and positioning apparatus according to the invention according to claim 1, wherein the first to fourth color selection electrodes respectively support the color selection electrodes at first to fourth support points forming a substantially square shape. A support, the first support point of the first color selection electrode support and the third support of the third color selection electrode support, each of which is located at a pair of diagonals of the substantially rectangular shape; A color selection electrode fixing support that fixes a point on a first plane parallel to a reference plane, and the second color selection electrode support of the second color selection electrode support that is positioned at the other diagonal of the other set of the substantially square shape. The second support point and the fourth support point of the fourth color selection electrode support are moved on a second plane parallel to the first plane, and are moved in a direction normal to the reference plane. A color selection electrode for varying the distance between the second plane and the first plane A dynamic support portion, and a color selection electrode height measuring means for measuring a height of a body surface of the color selection electrode whose orientation is determined by the color selection electrode fixed support portion and the color selection electrode movable support portion; And a color selection electrode support member mounting position determining means for determining a mounting position of the color selection electrode support member to the color selection electrode based on the height of the element body surface of the color selection electrode.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
<Embodiment 1>
FIG. 1 is a top view showing a color selection electrode support member mounting / positioning device according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. As shown in FIGS. 3 and 4, the color selection electrode 1 whose support member mounting position is determined by the color selection electrode support member mounting positioning device is connected to the panel pins 14 to 17 bonded to the panel 9 and the color selection electrode 1. By combining the bonded color selection electrode support members 10 to 13, they are assembled into the panel 9 at a distance Q. Assuming that a plane is formed by the color selection electrode support members 10 to 13, a distance from this plane to the inner surface of the panel 9 is H2, and a distance from this plane to the color selection electrode body surface 2 inside the color selection electrode 1 is H1. By calculating H1 and H2, Q can be calculated by subtracting H1 from H2.
[0011]
As shown in FIGS. 1 and 2, the color selection electrode support member mounting and positioning device includes a color selection electrode support base 31 to 34, a color selection electrode movable support 4, a color selection electrode fixed support 5, and a color selection electrode. The apparatus includes a color selection electrode height measuring unit 6, a movable supporting unit moving driving unit 7, and a supporting member moving actuator 8. The color selection electrode movable supports 4 have color selection electrode supports 32 and 34 fixed thereto, and the color selection electrode fixed support 5 has color selection electrode supports 31 and 33 fixed thereto. The color selection electrode support bases 31 to 34 support the color selection electrode 1 at four corners, but their support points P1 to P4 are not on the same plane but in a twisted positional relationship. The support points P1 to P4 form a substantially square shape P1-P2-P3-P4. Assuming that a plane formed by the surface of the color selection electrode fixing support 5 and extending in the horizontal direction (xy direction in FIG. 1) is a reference plane Sb, the support points P1 and P3 are fixed on a plane S1 parallel to the reference plane Sb. Have been. The support points P2 and P4 are supported by the color selection electrode movable support 4 and can be moved in the normal direction (z direction in FIG. 1) of the reference plane Sb by the movable support moving drive means 7. is there. In other words, the distance between the line segment P2-P4 and the reference plane Sb is varied while maintaining the state parallel to the reference plane Sb.
[0012]
Next, the operation of the color selection electrode support member mounting and positioning device will be described.
[0013]
First, as a first step, the horizontal position of the color selection electrode 1 is determined. The color selection electrode 1 is moved in a direction (xy direction in FIG. 1) horizontal to the reference plane Sb by a color selection electrode positioning means (not shown) to determine the position coordinates in the horizontal direction. That is, the plurality of color selection electrode positioning means (not shown) moves the color selection electrode 1 by pushing the color selection electrode 1 in the x-axis direction and the y-axis direction with an air actuator or the like, so that a plurality of color selection electrodes (not shown) fixed at predetermined positions. Positioning is performed by pressing the selection electrode positioning reference point.
[0014]
Next, as a second step, the attitude of the color selection electrode 1 is determined. Prior to the start of the operation, the line segment P2-P4 is at a position (negative direction of the z-axis) about 1 mm lower than the plane S1 including the line segment P1-P3. The degree of twist of the shape of the color selection electrode 1 is usually sufficiently smaller than 1 mm. Accordingly, the support points P1 and P3 are in contact with the color selection electrode 1, but the support points P2 or P4 are in a state where only one of them is in contact with the color selection electrode 1 regardless of the shape or size of the twist. It has become. For example, the following description is based on the assumption that only the support point P2 is in contact with the color selection electrode 1.
[0015]
In this state, when the color selection electrode movable support portion 4 is moved (elevated) in the z direction by the movable support portion movement driving means 7, the color selection electrode 1 is pushed up in the z direction by the support point P2, and the line segment is moved. It rotates around P1-P3, and eventually comes into contact with the support point P4. That is, it comes into contact with all four support points P1 to P4. When the state in which the color selection electrode 1 is in contact with all of the four support points P1 to P4 is detected and the movable support moving drive unit 7 is stopped, the line segments P1-P3 and P2-P4 Both can be in a state of being in contact with the color selection electrode 1 in a state parallel to the reference plane Sb. That is, the color selection electrode 1 can be controlled to a posture in which the twist is averaged. This contact detection means will be described in a third embodiment.
[0016]
Since the color selection electrode 1 is sufficiently heavy, it is not lifted by the thrust and separated from the color selection electrode support bases 31 to 34, and the rigidity is sufficiently strong that the deformation due to the thrust can be ignored. .
[0017]
Next, as a third step, the height of the element body surface of the color selection electrode 1 for calculating the value of H1 is measured. As shown in FIG. 1, the color selection electrode 1 whose horizontal position coordinates and orientation have been determined has the height of the color selection electrode body surface 2 at a plurality of measurement points by the color selection electrode height measuring means 6. Measured. The color-selecting electrode height measuring means 6 is arranged at the tip of the color-selecting electrode height measuring means 6 and moves at a low speed in the z-direction by a pulse motor. Tracing stylus movement amount detection means. A weak voltage is applied to the tracing stylus, and the color selecting electrode element surface 2 is grounded. The tracing stylus moves at a low speed in the z direction, and when it comes into contact with the color selection electrode element surface 2, it conducts and stops moving. The height of the color selection electrode element surface 2 can be measured by detecting this moving amount by the tracing stylus moving amount detecting means.
[0018]
Next, as a fourth step, the measurement of the panel 9 is performed. That is, the position coordinates of the panel pins 14 to 17 and the depth of the panel 9 for calculating the value of H2 are measured.
[0019]
Next, as a fifth step, the color selection electrode support members 10 to 13 are mounted and positioned on the color selection electrode 1. The color selecting electrode support member mounting and positioning means (not shown) calculates the value of H1 derived from the measurement result of the third step, the value of H2 derived from the measurement result of the fourth step, and the position coordinates of the panel pins 14 to 17. Then, the coordinates of the mounting positions of the color selection electrode support members 10 to 13 on the outer peripheral portion of the color selection electrode 1 are calculated such that the distance between the color selection electrode 1 and the panel 9 becomes Q.
[0020]
Note that the position coordinates of the panel pins 14 to 17 measured in the fourth step slightly deviate from the design coordinates, so that this deviation is also corrected. That is, the coordinate shift is calculated by subtracting the design coordinates from the measured position coordinates of the panel pins 14 to 17, and the coordinate shift is subtracted from the mounting position coordinates of the color selection electrode support members 10 to 13 to obtain the shift. Can be corrected.
[0021]
The support member attachment position coordinates calculated in this manner change in the directions of the three axes x, y, and z depending on the individual difference of the color selection electrode 1. Therefore, the support member moving actuator 8 that can move in three directions of the x, y, and z axes is used to perform the support member mounting positioning. The support member moving actuator 8 includes a dummy pin 20 simulating a panel pin at its tip and a gripping means (not shown) such as a magnet, and a reference hole provided in the color selection electrode support members 10 to 13 is provided with a dummy pin. The color selection electrode support members 10 to 13 are supported by a gripping means such as a magnet so as to be fitted to the support member 20. The color selection electrode support member mounting and positioning means moves the color selection electrode support members 10 to 13 to the calculated mounting position coordinates by moving the support member moving actuator 8 in three directions of the x, y, and z axes. Then, the color selection electrode support member is positioned on the outer periphery of the color selection electrode 1.
[0022]
The color selection electrode 1 is assumed to be sufficiently heavy. However, in order to prevent the color selection electrode 1 from floating due to thrust, the color selection electrode support bases 31 and 33 may be provided with color selection electrode pressing means as shown in FIG. desirable. Here, the holding plate 23 can rotate in the yz plane with the mounting portion 22 as an axis, and the holding wheel 21 can hold the color selection electrode 1 against the color selection support base 31.
[0023]
Further, instead of the color selection electrode supports 31 and 33, the color selection electrode supports 32 and 34 may include color selection electrode pressing means as shown in FIG. In FIG. 6, the color-selection-electrode movable support 4 is not supported by the movable-support-movement driving means 7, but is instead supported by the color-selection-electrode fixed support 5 via a spring 30. The holding members 24 and 25 are attached to the color selection electrode supports 32 and 34 by attachment members 26 and 27. For example, only the color selection electrode support 32 is in contact with the color selection electrode 1 at the support point P2, and the color selection electrode support 34 and the holding members 24 and 25 are not in contact with the color selection electrode 1. Suppose. When the holding members 24 and 25 descend, the holding member 24 comes into contact with the color selection electrode 1 and stops. The presser 25 is further lowered to rotate the color selection electrode 1 about the line P1-P3. At this time, the color selection electrode support bases 34 and 32 and the color selection electrode movable support portion 4 are raised in conjunction with the lowering of the presser 25, so that the color selection electrode 1 is sandwiched from above and below. Eventually, the color selection electrode 1 comes into contact with the color selection electrode support 34, and all of the color selection electrode supports 31 to 34 come into contact with the color selection electrode 1. Thereby, the color selection electrode 1 can be controlled to a posture in which the twist is averaged.
[0024]
As described above, in the color selection electrode support member mounting / positioning apparatus and the color selection electrode support member mounting / positioning method using the same according to the present embodiment, all of the support points P1 to P4 are brought into contact with the color selection electrode 1. Since the attitude of the color selection electrode 1 is thereby controlled, the torsion of the shape of the color selection electrode 1 can be averaged without performing complicated calculations. Therefore, the amount of calculation and the error can be reduced.
[0025]
When calculating the mounting positions of the color selection electrode support members 10 to 13, the position coordinates of the panel pins 14 to 17 adhered to the inner surface of the panel 9 are corrected in order to correct the deviation from the design coordinates. The displacement of the interval Q due to the displacement can be reduced.
[0026]
<Embodiment 2>
FIG. 7 is a cross-sectional view showing the movable support moving means 7 in the color selection electrode support member mounting and positioning apparatus according to Embodiment 2 of the present invention.
[0027]
The movable support moving means 7 has a built-in servomotor 28 which is an actuator capable of precise position control. By using the servo motor 28 as power, the color selection electrode movable support 4 can be moved more precisely.
[0028]
In addition, by providing the contact detection means described in the third embodiment, all of the color selection electrode support bases 31 to 34 come into contact with the color selection electrode 1, and at the same time, the raising of the movable support moving drive means 7 is stopped. Can be done.
[0029]
As described above, in the color selection electrode support member mounting / positioning device according to the present embodiment, since the servomotor 28 is used as the power of the movable support moving drive unit 7, positioning can be performed more precisely. In addition, the external force applied to the color selection electrode 1 can be reduced.
[0030]
Further, the power incorporated in the movable support unit moving driving means 7 is not limited to the servo motor, but may be any actuator capable of precise position control, for example, a pulse motor.
[0031]
<Embodiment 3>
FIG. 8 shows the color selection electrode 1 and the support points P1 to P4 for stopping the movement of the movable support moving means 7 in the color selection electrode support member mounting and positioning apparatus according to Embodiment 3 of the present invention. FIG. 4 is a diagram showing the operation of the contact detection means of FIG.
[0032]
The color selection electrode support 31 is grounded, and a weak voltage is applied to the color selection electrode supports 32 to 34. For example, when the color selection electrode 1 contacts the support points P1, P2, and P3 but does not contact the support point P4, the color selection between the support points P1 and P2 and between the support points P1 and P3 is performed. Conduction is performed using the electrode 1 as a medium, but not between the support points P1 and P4. Here, the movable support moving means 7 is moved, and when the support point P4 and the color selection electrode 1 come into contact with each other, the connection between the support points P1 and P4 is established. Therefore, by detecting the continuity between all of the support points P2, P3, and P4 and the support point P1 by the magnitude of the current flowing through the ammeter, the color selection electrode 1 and the support points P1, P2, P3, and P3 are detected. Contact with all of P4 can be detected.
[0033]
As described above, in the color selection electrode support member mounting / positioning device according to the present embodiment, by detecting conduction between the support point P1 and the support points P2, P3, and P4, the color selection electrode 1 and the color selection electrode support are detected. Contact with all of the tables 31 to 34 can be detected.
[0034]
<Embodiment 4>
FIG. 9 shows a color selection electrode 1 and support points P1 to P4 for stopping the movement of the movable support moving means 7 in the color selection electrode support member mounting and positioning apparatus according to Embodiment 4 of the present invention. FIG. 4 is a diagram showing the operation of the contact detection means of FIG.
[0035]
Each of the color selection electrode supports 31 to 34 can detect a load by incorporating the pressure sensor 29 therein. For example, when the color selection electrode 1 contacts the support points P1, P2, and P3 but does not contact the support point P4, the pressure due to the load is detected at the support points P1, P2, and P3. No pressure is detected at the support point P4. Here, the movable support moving means 7 is moved, and when the support point P4 comes into contact with the color selection electrode 1, the pressure sensor 29 detects the contact pressure at the support point P4 and drives the movable support. The movement of the means 7 is stopped.
[0036]
As described above, in the color selection electrode support member mounting and positioning apparatus according to the present embodiment, since the pressure sensor 29 detects the load at the support points P1 to P4, the color selection electrode 1 and the color selection electrode support base 31 are detected. -34 can be detected.
[0037]
【The invention's effect】
As described above, the color selection electrode support member mounting and positioning apparatus according to the first aspect of the present invention supports the color selection electrodes at the first to fourth support points forming a substantially square shape. To a fourth color selection electrode support, the first support point of the first color selection electrode support and the third color selection electrode support located at a pair of diagonals of the substantially square shape, respectively. A color selection electrode fixing support portion for fixing the third support point of the table on a first plane parallel to a reference plane, and the second colors respectively located at other diagonals of the other set of the substantially square shape The reference plane while locating the second support point of the selection electrode support and the fourth support point of the fourth color selection electrode support on a second plane parallel to the first plane. The distance between the second plane and the first plane by moving in the normal direction of A color selection electrode movable support portion to be varied, and a color selection electrode height measurement for measuring a height of a body surface of the color selection electrode whose orientation is determined by the color selection electrode fixed support portion and the color selection electrode movable support portion. Means, and a color selection electrode support member mounting positioning means for determining a color selection electrode support member mounting position to the color selection electrode based on the measured height of the element surface of the color selection electrode. By bringing all of the fourth support points into contact with the color selection electrode, the color selection electrode can be controlled to an appropriate posture. Therefore, the twist of the shape of the color selection electrode can be averaged without performing the correction of the rotation direction, so that the calculation amount and the error can be reduced, and the accuracy in the process of attaching the color selection electrode to the panel can be reduced. And increase productivity.
[Brief description of the drawings]
FIG. 1 is a top view of a color selection electrode support member mounting and positioning device according to a first embodiment.
FIG. 2 is a cross-sectional view of the color selection electrode support member mounting and positioning device according to the first embodiment.
FIG. 3 is a cross-sectional view of the color cathode ray tube according to the first embodiment.
FIG. 4 is a sectional view of the color cathode ray tube according to the first embodiment.
FIG. 5 is a cross-sectional view of a color selection electrode pressing unit according to the first embodiment.
FIG. 6 is a cross-sectional view of a color selection electrode pressing unit according to the first embodiment.
FIG. 7 is a cross-sectional view of a driving unit for moving a movable support unit according to the second embodiment.
FIG. 8 is a diagram illustrating an operation of a contact detection unit according to the third embodiment.
FIG. 9 is a diagram illustrating an operation of a contact detection unit according to the fourth embodiment.
[Explanation of symbols]
1 color selection electrode, 2 color selection electrode body surface, 4 color selection electrode movable support section, 5 color selection electrode fixed support section, 6 color selection electrode height measurement means, 7 movable support section moving drive means, 8 support member movement Actuator, 9 panels, 10-13 color selection electrode support members, 14-17 panel pins, 20 dummy pins, 21 holding rings, 22 mounting parts, 23 holding plates, 24, 25 holding tools, 26, 27 mounting tools, 28 servo motors 29 pressure sensor, 30 spring, 31-34 color selection electrode support, P1, P2, P3, P4 support point.

Claims (6)

First to fourth color selection electrode supports respectively supporting color selection electrodes at first to fourth support points forming a substantially square shape;
Reference is made to the first support point of the first color selection electrode support and the third support point of the third color selection electrode support, which are respectively located at a pair of diagonals of the substantially square shape. A color selection electrode fixing support portion fixed on a first plane parallel to the plane,
The second support point of the second color selection electrode support and the fourth support point of the fourth color selection electrode support, which are located at the opposite corners of the other set of the substantially square shape, respectively. A color selection electrode movable to move in a direction normal to the reference plane while being positioned on a second plane parallel to the first plane, thereby changing a distance between the second plane and the first plane. A support,
A color selection electrode height measuring means for measuring the height of the body surface of the color selection electrode whose orientation is determined by the color selection electrode fixed support and the color selection electrode movable support;
From the measured height of the element surface of the color selection electrode, determine the color selection electrode support member mounting position to the color selection electrode, color selection electrode support member mounting positioning means,
A color selection electrode support member mounting and positioning device comprising: It is a color selection electrode support member attachment positioning device of Claim 1, Comprising:
The color selection electrode supporting member mounting and positioning device, wherein the color selection electrode movable support portion includes an actuator capable of precise position control as a power for moving. It is a color selection electrode support member mounting positioning device according to claim 1 or claim 2,
A color selection electrode support member mounting / positioning device, further comprising means for detecting contact between the color selection electrode and the first to fourth support points by electrical conduction. It is a color selection electrode support member mounting positioning device according to claim 1 or claim 2,
A color selection electrode support member mounting / positioning device further comprising a pressure sensor for detecting contact between the color selection electrode and the first to fourth support points. A color selection electrode support member mounting and positioning method using the color selection electrode support member mounting and positioning device according to any one of claims 1 to 4,
Measuring the depth of the panel to be combined with the color selection electrode;
Forming on the inner surface of the panel, measuring the position coordinates of a plurality of panel pins for fitting with the color selection electrode support member,
From the state where the color selection electrode is supported at three support points including the first support point, the third support point, and the second or fourth support point, the second support point By moving the fourth support point in a direction normal to the reference plane while positioning the fourth support point on a second plane parallel to the first plane, the first to fourth support points Determining the orientation of the color selection electrode by shifting to a state of supporting the color selection electrode at all four support points;
A step of measuring the height of the color selection electrode whose posture has been determined by the color selection electrode height measuring means,
Determining a color selection electrode support member mounting position by the color selection electrode support member mounting positioning means from the measured depth of the panel, position coordinates of the panel pin, and height of the color selection electrode. Selection and positioning method of electrode support member. It is a color selection electrode support member attachment positioning method of Claim 5, Comprising:
Calculating the deviation between the measured position coordinates of the panel pins and the design coordinates of the panel pins for each panel pin,
Correcting the coordinates of the mounting positions of the color selection electrode support members corresponding to the respective panel pins according to the displacement.

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