JPS59149633A - Color picture tube and manufacture - Google Patents

Abstract

PURPOSE:To obtain a highly practical color picture tube where a pluraity of masks are fixed accurately with predetermined interval while maintaining insulation, by fixing a sliding metal chip fixed through a metal chip to one end of fixing member to the skirt section of one mask while the mask at the other other end to the other mask or skirt section. CONSTITUTION:In order to set two masks 7, 8 with predetermined intervl, two masks contacting tightly are applied on a frame 16 to weld one mask 8 to the frame 16. Then under such state where a referential pin 32 is inserted through one holes 38, 40 of two metal chips 35, 36 of fixing member and matched, a metal chip 34 is welded to theframe 16 while the sliding metal chip 36 is welded to the mask 7. Thereafter said pin 32 is drawn out to insert the referential pin 32 through the other referential holes 37, 39 of two metal chips 35, 36.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is characterized in that a plurality of masks are placed in close proximity to a screen surface, and a plurality of masks are made to face each other at a predetermined interval, and each aperture of the plurality of masks is This book is famous for a color picture tube having a structure arranged so that an electron beam passes through it and a method for manufacturing the same, and in particular for a mask fixing structure and fixing method.

[Technical background and problems of the invention]

A mask focusing type color picture tube is well known as a color picture tube having a plurality of mask structures.

A mask focusing color picture tube applies a predetermined potential difference to a plurality of masks facing each other with a predetermined interval, and forms an electrostatic lens for the electron beam passing through each aperture of the mask and mask. Such a mask-focusing color picture tube, which can significantly increase the utilization rate of the electron beam, is disclosed in, for example, U.S. Pat. No. 2,971,
No. 117, U.S. Patent No. 3,398,309, Special Publication No. 3
This method is disclosed in Japanese Utility Model Publication No. 8-22030, Japanese Utility Model Publication No. 47-20451, and the like.

Other examples of color picture tubes having the above-mentioned structure include the two-mask structure shown in Japanese Patent Publication No. 55-2698, Japanese Patent Application Laid-Open No. 50-57575, Japanese Utility Model Application No. 48-93769, etc. There is one color tube.

This is because in a color picture tube with a normal one-mask configuration, the mask is thermally deformed due to the impact of the electron beam on the mask, and the electron beam does not impact certain phosphors on the screen.
Therefore, the color purity deteriorates due to so-called mis-landing, so to prevent this, a two-mask configuration is used, and the first mask blocks unnecessary electron beams due to the impact of the phosphor, resulting in a color purity function. This is designed to suppress the temperature rise of the important second mask as much as possible.

In the mask focusing type color picture tube and the color picture tube having two masks for preventing mislanding, it is necessary to remove the structure in which the apertures of the plurality of masks are arranged in correspondence with each other on the entire surface of the mask.
It is extremely difficult to manufacture a mask with a structure similar to that of For example, Japanese Patent Publication No. 47-8261, Japanese Patent Publication No. 47-2
A method of manufacturing a mask having the above structure has been proposed in Japanese Patent No. 8188, etc., but this method lacks moldability of the mask because an insulator, such as a glass insulator, is placed over the entire surface of the mask except for the aperture portion. The charging phenomenon caused by the beam impact on the insulator section adversely affects the beam passing through the decoy aperture section, which is impractical.

In contrast, Japanese Patent Laid-Open No. 2003-1991 has developed a practical mask forming method that allows the apertures of multiple masks to correspond correctly one-to-one by stacking multiple flat masks and press-molding them at the same time. 57-1387
This is proposed in Publication No. 46.

In the above mask molding method, when press molding is performed in the same way as a normal mask, and the peripheral part of the mask, the so-called skirt part, is deeply folded, even if multiple molded masks are fixed at a predetermined interval, each molded mask will not fit in the skirt part. may come into contact with each other and result in C. Therefore, it is not possible to apply different potentials to each of multiple masks, and even if multiple masks are made to have the same potential, each mask is in contact with the other, so the temperature change of one mask is different from the temperature change of one mask. Problems arise, such as rapid transmission to the mask.

For this reason, it is possible to consider methods such as inserting an insulator into the skirt portion of the mask in advance and setting the skirt portions of multiple masks alternately so that the skirt portions do not overlap, but masks with these structures are press-molded. Each effective part of a multi-layered mask must be fixed with high precision at predetermined intervals. At this time, since the plurality of masks must maintain insulation, it is not possible to weld and fix all the masks to the frame at their skirt portions. Furthermore, even if a heat-resistant adhesive is used, it is extremely impractical due to its poor workability.

[Purpose of the invention]

An object of the present invention is to provide a highly practical fixing structure for fixing a plurality of masks in a color picture tube having the above-mentioned multi-mask configuration while keeping them at predetermined intervals with high precision and maintaining insulation properties, and a method for manufacturing the same. It's about doing.

[Summary of the invention]

In the present invention, the number of molded masks is as low as 1:1.
Fix one mask to the frame using its skirt, and use the fixing members to tighten the other masks.

The skirt portion and the skirt portion of the frame or other mask are welded and fixed.b. In this case, the fixing member holds one metal piece at one end of the insulator, one metal piece having a reference hole at the other end, and a sliding metal piece having two corresponding reference holes, The distance between the two masks is set using the two reference holes.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an example of a color picture tube to which a mask made from unexploded EIJIK is applied, and shows the schematic structure of a mask convergence area color picture tube.

Mask focusing type color receiver l#! shown in Figure 41! The tube mainly includes a face plate (2) having a screen m (1), and a funnel (2) on the side wall of the face plate (2).
a neck (4) connected via a neck (3);
4) and the funnel (3).
) to the neck (4), a mask (force) having a large number of apertures arranged oppositely at predetermined intervals on the screen (1); A mask (8) having a large number of apertures uQ arranged oppositely at a predetermined interval on the electron gun (5) side, and a mask (8) having a plurality of apertures uQ arranged opposite to each other at a predetermined interval on the electron gun (5) side, and a mask (8) having a mask (8) having a plurality of apertures uQ arranged oppositely at a predetermined distance from each other on the electron gun (5) side; It consists of a coated conductive group (9).On the screen surface (i>, metal-backed three-color phosphors (l) are regularly arranged.On the inside side of the face plate (2). is provided with a frame (bin (17) that holds the country, and frame a
The frame (IQ) is held by fitting the etic welded elastic body 0υ into the bottle ([7).

Frame 116) has two masks (power, (8) ga zetsu,
It is kept solid and fixed.

The funnel part (3) has two button ties, (2
o) is embedded and one button 1. l Admiration is guidance.
Another button (20+) is in contact with the film (9) and is insulated from the conductive film (9) so that different potentials can be applied from the outside.

'The mask (8) on the Naruko gun side is connected to the frame (through the country).
At the same time as it is in contact with the coronary membrane (9), it is also in contact with the frame t16) and the screen surface +1) via the bin α force, and a high anode pressure is applied from the outside.

On the other hand, the mask (7) on the screen side is in direct contact with the conductors 1 and 3 connected by the connector CA, and a d pressure slightly lower than the anode sieve voltage is applied from the outside.

In the above configuration, the three magneton beams [Ifl] generated from the electron gun (5) and the ring r u21 are connected to the opening device (6
), passes through the aperture haze of the first mask (8), receives the lens effect, passes through the second mask (power aperture f14), reaches the screen surface (1), and releases the corresponding phosphor. Make it glow. Therefore, two masks (force, (8) each aperture (14), (15)
must have a one-to-one correspondence. To manufacture a mask configured in this way, for example, two flat masks are fixed with a filler or the like through them, press-molded at the same time, and after the filler or the like is removed, the two masks are set at a predetermined interval. It is used to hold it fixedly. In order to securely maintain the two molded masks at a predetermined distance with good spacing, a fixing member is used as shown below.

Figure 2 shows two masks (7) and (8) that were press-formed at the same time and the filler was removed, an insulating film (for example, polyimide film), a frame uf9, and a fixing member C.
31) and a schematic configuration diagram showing reference bin countries. The fixing part (31) has one metal piece C3 at one end between the glass insulators.
4) has one metal piece 05) embedded in the other end, and the metal piece (, 351 is accompanied by a slidable gold wing piece (36), and the two metal pieces 15) and (G) each have two reference holes (: (7)
, (c), C3ri, (40) are provided. The positional relationship of these reference holes is shown in Fig. 3. When one reference hole C38) and f4G are aligned, the other reference hole C3η, C3!11 is shifted by a predetermined interval QM. It is a sectional view including a reference hole of a member (31).

Such a fixing member can be easily manufactured by a method such as melting a glass insulator and instantaneously inserting a metal piece.

To set the two masks (71, (8)) at a predetermined interval, first set the two masks (71, (8)) that are in close contact with each other to the frame (
2) and fix one mask (8) to the frame α6) by welding.

Next, as shown in Figure 2, two metal pieces C3 of the fixing member,
Cd5), one of the reference holes (to), and the reference pin (40)
With the three parts inserted and aligned, the metal piece u4 is welded and fixed to the frame (I6), while the metal piece for the slide (welded and fixed to the mask (force). At this time, metal piece 04) is
Depending on its structure, it may be fixed to the mask (8) by welding. After that, pull out the reference bottle 021 and add two new metal pieces G5).

Insert the reference pin 21 into the other reference hole (07) and (3!IIK) as shown in Fig. They match. Therefore, the mask (force) that was welded to the metal piece for sliding also slides at the same time and the two masks (force, (
8) is set to a predetermined interval QM. In this state, two metal pieces G [exist].

(:! If A is fixed by welding, the two masks (force, (8) are fixed at a predetermined interval. The reference pin country is pulled out into the grain layer.

In the above embodiment, the positional relationship between the two reference holes is as follows.
Although the structure is as shown in the figure, the present invention is not limited to this, and the present invention can be applied to any structure that can be set at a predetermined interval by using reference holes. For example, as shown in FIG. 5, one metal piece (G) has only one reference hole 60), and the other metal piece C3 has two reference holes (51),
(52), and this reference hole (51).

If the distance of (52) is set to the predetermined distance 1 (QM), the reference hole (5Cj) of one metal piece (to) is set to 0 of the other metal piece.
By sequentially aligning the two reference holes (51) and (52) in 7), the two masks can be maintained at a predetermined distance as in the previous embodiment. Further, contrary to FIG. 5, two reference holes may be provided in one metal piece (trowel) and one reference hole may be provided in the other metal piece (not shown).

In addition, in the above embodiment, there is no □ in the skirt portions of the two masks.
Although the edge film C301 is inserted, the present invention is not limited to this, and it goes without saying that the present invention can be applied to a case where the skirt portions of two masks do not overlap with each other.

Further, in the above-mentioned embodiment, the case of a two-mask configuration was described, but it goes without saying that the present invention is not limited to this, but can also be applied to a plurality of mask configurations.

〔Effect of the invention〕

As described above, in a color picture tube having a multi-mask configuration, metal pieces are provided at both ends of the insulator, one metal piece has at least one reference hole, and a slide metal having at least one reference hole is used. By using a fixing member with a piece, it is possible to maintain insulation between a plurality of masks at a predetermined interval with high accuracy. Therefore, compared to heat-resistant adhesives, it has very good workability and is highly practical and practical.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a color picture tube of the present invention, FIGS. The figure is a schematic sectional view for explaining the fixing member and its assembly method which are also applied to the present invention, and FIG. 5 is a schematic cross-sectional view showing another embodiment corresponding to FIG. 3. . (7), (8)...Mask ('3D...Fixing member (G)...Insulator (3ω...Metal piece)...Metal piece (3G (...for sliding) Metal piece C37), (dark, edge, (4Q...reference hole 04...
・Reference pin No. 1 Fig. 2 A

Claims (1)

[Scope of Claims] l) A plurality of masks each consisting of a curved surface portion having a large number of apertures on a certain curved surface and a skirt portion connected to the curved surface portion and holding the curved surface portion, and supporting the plurality of masks. At least one mask is welded and fixed to the frame, and the other masks are insulated and fixed by fixing parts including insulators, and the curved surfaces of each mask are set at predetermined intervals. In the color picture tube, the fixing member has one metal piece fixed to one end of an insulator, and a metal piece having at least one reference hole fixed to the other end while maintaining insulation, and the metal piece having the reference hole. The piece is accompanied by a sliding metal piece having at least one reference hole of t5i pieces, and the sliding metal piece at the other end of the fixing member is attached to the skirt part of one mask, and the metal piece at one end is attached to the skirt part of one mask. is fixed by welding to the skirt portion of the frame or other mask. 2) Consisting of a plurality of masks each consisting of a curved surface part having a large number of apertures on a certain curved surface and a skirt part connected to the curved surface part and holding the curved surface part, and a frame supporting a plurality of second class masks, A method for manufacturing a color picture tube, in which at least one mask is welded and fixed to the frame, other masks are insulated and fixed by a fixing member, and the curved portions of each mask are set at predetermined intervals,
The fixing member has a metal piece fixed to one end of an insulator and a metal piece having a reference hole at the other end while maintaining insulation, and has a reference hole that fits into the metal piece having the reference hole. At least one of the metal pieces fixed to the other end of the insulator and the reference holes of the slide metal piece has two reference holes, and the two metal pieces have two reference holes.
Align the respective reference holes of the metal pieces and insert the reference pin, and attach the metal piece on the side of the fixing member that does not have the reference hole to the mask frame or the scarf 1 of one of the masks.
The slide metal piece is welded and fixed to the skirt part of the other ask, the reference bottle is removed, and the slide metal piece is welded and fixed to a part of the ask so as to match the other metal pieces in the two reference holes. A collar characterized in that the two metal pieces having the reference holes are fixed by welding by sliding the piece along the non-insulated fixed metal piece and inserting the reference pin into the matching reference hole. How to make a picture tube.