JPH07141988A - Positioning method for plural panels - Google Patents

Abstract

PURPOSE:To accurately and efficiently perform the positioning of plural opaque panels (plate-like electrode, etc.,) arranged into plural stages. CONSTITUTION:Spotlike marks 8a, 9a,... shifted at a given pitch width every panel are provided on the respective plate surfaces of plural opaque panels 8 and 9. Also inspection holes 9b, 10b,... for the marks of other panels are provided on at least one of these panels. The plural panels 8, 9,... are arranged into plural steps so that the plate surfaces can be made parallel to each other to arrange an objective lens 13 on the upper or lower side of the panels 8, 9,.... The marks of the respective panels are optically detected through the objective lens 13 moved onto the center axis of the respective marks 8a, 9a,... and necessary inspection holes to perform the relative positioning of the plural panels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a plurality of non-translucent panels (plate-shaped electrodes in the case of CFP) in the manufacture of flat type color picture tubes commonly called CFP (color flat panel). The present invention relates to a method of aligning a plurality of panels applied in the step of aligning manually.

[0002]

2. Description of the Related Art CFP is different from ordinary color picture tubes.
An electrode configuration in which a large number of plate-shaped electrodes are arranged in multiple stages is provided. Therefore, the ordinary electrode alignment method for color picture tubes cannot be applied to align a large number of plate-shaped electrodes arranged in a large number of rows with each other, and the plate-shaped electrodes are preliminarily attached to the opaque panel. The electrodes are aligned with each other (in the direction along the plate surface) based on the marker (marker).

A part of the conventional example shown in FIG. 3 is exaggeratedly drawn, but five plate-shaped electrodes 1 and 2 are arranged in five stages so that plate surfaces are parallel to each other. 5 to 5 have holes 1a, 2a to 5a as alignment marks, respectively. In this case, the electrode group is aligned such that the central axes of the five holes 1a, 2a to 5a overlap the common vertical axis 6 serving as a reference. Since the five holes 1a to 5a are optically detected through the objective lens 7, the four holes 2a other than the hole 1a are detected.
-5a will serve as a peephole in addition to the role as a positioning marker. Therefore, the hole 2a
Reference numerals 5a to 5a are formed in a circular shape whose diameter gradually increases toward the objective lens 7 side. The objective lens 7 constitutes an optical system of a visual recognition device (not shown), and its lens magnification can be arbitrarily adjusted.

[0004]

The objective lens 7 in the state shown in FIG. 3 is focused on the peripheral portion of the hole 1a of the plate electrode 1 of the first stage. When detecting the holes 2a to 5a of the plate-shaped electrodes 2 to 5 in the second and subsequent stages, the objective lens 7 is sequentially raised so that the peripheral edges of the holes 2a to 5a are in focus. However, since the objective lens 7 is adjusted to a relatively high lens magnification when the smallest hole 1a is captured, the objective lens 7 is raised by a predetermined distance while maintaining this lens magnification, and the other hole 2a is adjusted. When it is attempted to detect the peripheral portions of the holes 5a to 5a, the holes 2a to 5a have a larger diameter than the hole 1a, so that it may not be possible to fit the entire circumference of the large hole in the recognition visual field. In such a case, in addition to raising the objective lens 7 by a predetermined distance, it is necessary to artificially adjust the lens magnification. In addition, it is necessary to newly make an adjustment to correct the focal position shift caused by changing the lens magnification, and since these adjustments cannot be made uniformly, it is necessary to rely on manpower. Moreover, it is difficult to accurately detect the center axis position of the large diameter hole.

Therefore, an object of the present invention is to provide a positioning method capable of accurately detecting the central axis position of a mark provided on a plurality of opaque panels, and further eliminating the need for artificial adjustment of magnification or the like with respect to an objective lens. To provide.

[0006]

In order to achieve the above-mentioned object, the present invention provides spot-like markers, which are shifted by a predetermined pitch width for each panel, on each plate surface of a plurality of opaque panels, Providing at least one of the panels with a peephole for a sign on the other panel;
Arranging a plurality of panels in a plurality of stages so that their plate surfaces are parallel to each other, and arranging an objective lens having an optical axis along the direction of the arrangement above or below the panels arranged in a plurality of stages. At the stage of setting, the markers on each panel are optically detected through the objective lens and the necessary peepholes that are sequentially moved on the central axis of each marker, and the relative alignment of multiple panels is performed. A method for aligning multiple panels is provided, comprising:

The objective lens moved on the central axis of each sign can be moved up and down without changing the lens magnification to adjust the focus position to the sign.

[0008]

According to the present invention, since the markers provided on the respective plate surfaces of the plurality of opaque panels are in the form of spots shifted by a predetermined pitch width for each panel, it is possible to detect the central axis position of each marker. Can be done accurately. Further, since the peephole provided separately from the marker on the panel has the function of exposing each marker of the plurality of panels arranged in a plurality of stages to the objective lens side, the size of the marker given to the plurality of panels can be changed. It can be almost the same. Therefore, it is possible to eliminate the troublesome adjustment work such as the adjustment of the lens magnification and the accompanying focus position adjustment, by only moving the objective lens on each sign by a predetermined pitch width and moving it by a certain amount in the vertical direction. You can Moreover, the sign is not limited to a hole, and can be formed by engraving, painting, or the like.

[0009]

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

Five non-translucent panels 8 and 9 shown in FIG.
Reference numeral 12 is a plate-shaped electrode for CFP, which is arranged in a plurality of stages such that the plate surfaces are parallel to each other. The optical axis of the objective lens 13 arranged above the array is aligned with the array direction.

The five opaque panels 8 and 9 to 12 have spot-like (dot-like) markers 8a and 9a to 12a, respectively, and the markers 8a and 9a to 12a, which are small holes, are shown in FIG. As shown in a) to (e), as going from the opaque panel 12 on the objective lens 13 side to the opaque panel 8 on the other side, one by one with a predetermined pitch width P in one direction along the plate surface. Have shifted to.

On the other hand, the second opaque panel 9 counting from the opaque panel 8 farthest from the objective lens 13
Is a relatively large circular peep hole 9 for exposing the marker 8a of the opaque panel 8 in the preceding stage to the objective lens 13.
b. In addition, the third opaque panel 10
Has an exclamation mark-shaped peep hole 10b for exposing the markers 9a, 8a of the opaque panels 9 and 8 at the front stage and the front stage to the objective lens 13, and therefore, the second and subsequent stages do not have the holes. The translucent panels 9 to 12 have a peep hole for exposing the marker of the non-translucent panel in the previous stage to the objective lens 13. The four opaque panels 8 to 11 from the first stage to the fourth stage are provided with exclamation point-shaped peep holes 8c to 10c and circular peep holes 11c whose diameters gradually decrease with the increase in the number of stages. Each is provided.

The peepholes 8c to 11c in this embodiment play a role of light guides for guiding the light emitted from the illumination device 14 to the objective lens 13 side. The illumination device 14 can be moved together with the objective lens 13, but when a long illumination device 14 is used, it is not necessary to move it.

Although not shown, the objective lens 13
Constitutes an optical system of a visual recognition device equipped with an imaging device for image processing and a CPU, etc., and its signal output enables movement and rotation in horizontal and vertical directions along a plate surface. XY / θ table etc. are driven,
This allows the panel groups to move in the directions and dimensions required for alignment.

The optical axis of the objective lens 13 when the fifth opaque panel 12 is aligned is placed on the marker 12a. Then, image processing is performed with the marker 12a being in focus. When the first opaque panel 8 is aligned, the objective lens 13 is moved to the position indicated by reference numeral 13a, and image processing is performed with the marker 8a focused.

The objective lens 13 may be arranged below the non-translucent panels 8 to 12 arranged in a plurality of stages. At this time, the peep holes 8c to 11c play a role of exposing the markers 12a to 9a to the objective lens 13.

The five markers 8a to 12a are spot-shaped ones having a fixed size and shifted by a predetermined pitch width P for each panel, and peep holes 9b to 12b for exposing the markers 8a to 12a to the objective lens 13 are provided. Since they are provided separately, it is possible to align the opaque panel group with high resolution, accuracy, and efficiency.

The opaque panel in the above embodiment is CP
Although it was a plate electrode for F, it is not limited to this. Further, the plurality of light-transmissive panels may be stacked in a state of being in contact with each other. Further, the above-described set of the mark and the peephole can be provided at two positions near both ends of the panel plate surface.

[0019]

As described above, according to the present invention, the sign can be formed as small as possible and the peephole can be formed as large as possible, so that the central axis of the sign can be detected with high accuracy and easily. Further, since it is possible to hardly change the lens magnification or the like of the objective lens during the alignment, automation can be facilitated, and the alignment of the opaque panel group can be performed with high resolution, accuracy and efficiency.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of an embodiment of the present invention.

FIG. 2 is a plan view of a sign and a peephole used in an embodiment of the present invention.

FIG. 3 is a side sectional view for explaining a conventional panel alignment method.

[Explanation of symbols]

 8, 9-12 Non-translucent panel 8a, 9a-12a Marker 8b, 9b-12b Peephole 13 Objective lens

Claims (2)

[Claims] 1. A plurality of non-translucent panels, each plate surface of which is provided with a spot-like sign that is shifted by a predetermined pitch width for each panel, and at least one of the panels is a peep for signs of other panels. Providing holes, arranging a plurality of panels in a plurality of stages such that the plate surfaces are parallel to each other, and above or below the panels arranged in a plurality of stages, the optical axis is aligned in the direction of the arrangement. The objective lens that has been moved along the central axis of each sign and the necessary peepholes to optically detect the marker on each panel, and A method of aligning a plurality of panels, the method comprising: aligning. 2. A plurality of panels according to claim 1, wherein the objective lens moved on the central axis of each sign is moved up and down without changing the lens magnification to perform the focus position adjustment for the sign. Alignment method.