JP2003100233A - Cathode-ray tube and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of an aperture grille type color cathode-ray tube that the configuration of the color cathode-ray tube does not allow extra holes for raster rotation adjustment to be formed on the grille of a color selection structure, and in order to perform the adjustment, an extra adjustment tool is prepared, the adjustment is performed with the extra adjustment tool mounted, and consequently not only the number of processes in a production line increases, but also the raster rotation adjustment is not performed with the color cathode-ray tube assembled into a monitor. SOLUTION: A pair of extra holes 7 for the raster rotation adjustment are formed on both sides of a non-display region 8 formed by the black matrix over a display surface 2a of a panel glass 2 of the color cathode-ray tube.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an aperture grill type color cathode ray tube, and more particularly to a cathode ray tube having a structure for facilitating raster rotation adjustment and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIG. 7 is a schematic view showing a main part of a conventional general aperture grill type color cathode ray tube. In the figure, the glass bulbs forming the outer circumference of the color cathode ray tube 50 are roughly classified into a panel glass portion 51,
It is composed of a funnel portion 52 and a neck portion 53. An electron gun 54 is arranged in the neck portion 53, and the outer peripheral portion from the funnel portion 52 to the neck portion 53 is
A deflection yoke 55 is arranged.

A fluorescent screen 56 is formed inside the display surface 51a of the panel glass portion 51, and an aperture grill type color selection mechanism 57 is disposed in parallel with the fluorescent screen 56 in the vicinity of the fluorescent screen 56. ing. An explosion-proof band 58, which is a metal band for preventing the implosion of the color cathode ray tube 50, is provided on the outer peripheral surface of the skirt portion 51b of the panel glass 51.

FIG. 8A is a perspective view showing the construction of the aperture grill type color selecting mechanism 57, and FIG. 8B is a shadow mask type color selecting mechanism 63 shown for comparison. It is a perspective view which shows the structure of.

The aperture grill type color selection mechanism 57 shown in FIG. 1A supports the upper and lower end portions of the grille 60, which are formed into a comb shape with the slits 60a except the outer peripheral portion, while pulling them with the frame 61. It is configured to do.
On the other hand, the shadow mask type color selection mechanism 63
Electron beam transmission holes 65 of dots or slots are formed in the curved surface portion 64 facing the panel glass portion, and are formed by pressing. Further, in the color selection mechanism 63, a pair of extra holes 66 are formed on the horizontal center line 100 of the curved surface portion 64 on both sides outside the region where the electron beam transmission hole 65 is formed.

The pair of extra holes 66 are effective when adjusting the raster rotation. That is, in the cathode ray tube equipped with the color selection mechanism 63, a horizontal bright line is displayed at a predetermined position passing through the center of the curved surface portion 64, and the horizontal bright line is deflected so as to simultaneously pass through the pair of extra holes 66 at both ends. By adjusting the rotation position of the yoke,
Raster rotation adjustments can be made.

On the other hand, in the aperture grill type color selection mechanism 57 shown in FIG. 8 (a), when such an extra hole is formed on both sides of the grill 60 outside the formation region of the slit 60a, the tension changes. Or, since the shape of the outermost slit is changed, the extra hole cannot be formed in the grill 60.

Therefore, when the raster rotation is adjusted in the color cathode ray tube 50 equipped with the conventional aperture grill type color selection mechanism 57, the adjustment is performed using a rotation adjusting jig based on the outer shape of the panel glass portion 51. I was going.

This rotation adjusting jig has a transparent glass surface with an instruction line drawn at a position corresponding to the center line based on the outer shape of the panel glass part 51, and when mounted on the panel glass part 51, As shown in the configuration diagram of FIG. 9, at positions passing through the horizontal and vertical centers of the panel glass part 51,
It is confirmed that the horizontal indicator line 71 and the vertical indicator line 72 overlap each other. It should be noted that the horizontal instruction line 71 and the vertical instruction line 72 are drawn at opposite positions on both surfaces of transparent glass in order to eliminate the influence of parallax.

When performing the raster rotation adjustment using this rotation adjustment jig, the horizontal indicator line 71 is overlapped with the horizontal center position of the display surface 51a of the panel glass portion 51 of the cathode ray tube 50 as described above, and this state is set. Then, the cathode ray tube is operated to display a horizontal bright line at a predetermined position passing through the center of the display surface 51a, and the rotational position of the deflection yoke 55 is adjusted so that the horizontal bright line coincides with the horizontal indicator line 71. Was being adjusted.

[0011]

As described above, in the color cathode ray tube of the aperture grill type, the color selection mechanism 57 is used.
Since an extra hole cannot be formed in the grill 60, it is necessary to separately prepare a rotation adjusting jig and adjust the raster rotation when adjusting the raster rotation. For this reason, in the manufacturing line, the number of adjustment steps is increased due to the insertion and removal of the jig, or the adjustment efficiency is decreased due to complexity, which causes a cost increase.

Further, after the cathode ray tube was assembled as a monitor, the raster rotation adjustment could not be performed without disassembling it.

An object of the present invention is to solve these problems and provide a cathode ray tube which can easily adjust the raster rotation without using an adjusting jig and even after being assembled in a monitor. .

[0014]

A cathode ray tube according to claim 1 comprises:
In a panel glass portion having a display surface of an aperture grille type color cathode ray tube, in the non-display area formed in the peripheral portion of the display area on which the image is displayed, the outer shape of the panel glass portion is used as a reference. On the horizontal axis of the display surface, at least a pair of extra holes is formed on both sides of the display area so that light emission upon receiving an electron beam can be confirmed from the outside of the cathode ray tube.

A cathode ray tube according to a second aspect is the cathode ray tube according to the first aspect, characterized in that the extra hole is formed on the assumption that the horizontal axis passes through substantially the center of the display surface. . A cathode ray tube according to a third aspect is the cathode ray tube according to the first aspect, wherein the non-display area is formed of a black matrix layer, and the extra hole is formed by providing a hole through which light is transmitted in the black matrix layer. It is characterized by having done.

The method of manufacturing a cathode ray tube according to claim 4 is the method of manufacturing a cathode ray tube according to claim 3, wherein a black matrix formed on the inner surface of the display surface of the panel glass portion by an exposure machine. When a layer is exposed to ultraviolet rays to form the display area and the pair of extra holes, a light-blocking hole having a transmission hole on the optical path from the light source to the display surface where the transmitted ultraviolet rays hit the positions of the pair of extra holes It is characterized in that a plate is arranged and exposed.

The method of manufacturing a cathode ray tube according to claim 5 is
The method of manufacturing a cathode ray tube according to claim 4, wherein the light-shielding plate has a hollow portion, and the ultraviolet rays that have passed through the hollow portion are colors of an aperture grill system arranged in the panel glass portion. It is characterized in that the light is transmitted through the slit portion of the sorting mechanism to hit a predetermined portion of the display area.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1A is a configuration diagram showing a main configuration of a panel glass part 2 constituting a cathode ray tube according to a first embodiment of the present invention.

An aperture grill type color cathode ray tube (hereinafter simply referred to as a color cathode ray tube) 1 shown in FIG.
This panel glass part 2 is adopted, and the constituent elements other than this panel glass part 2 are common to the color cathode ray tube 50 of FIG. 7 described above. Therefore, the same parts as those of the color cathode ray tube 50, or the parts corresponding to the same, are denoted by the same reference numerals, the description thereof will be omitted, and different points will be mainly described.

Here, the operating principle of the color cathode ray tube 1 will be described. The three electron beams 3 emitted from the electron gun 54 arranged in the neck portion 53 of the glass bulb forming the outer circumference of the color cathode ray tube 1 are deflected vertically and horizontally by the deflection yoke 55. The deflected electron beam 3 passes through the aperture grill type color selecting mechanism 57 and strikes a predetermined position of the fluorescent screen 56 formed on the inner surface of the panel glass part 2. An image is displayed by the electron beam 3 scanning the phosphor screen 56 vertically and horizontally.

As shown in FIG. 1A, the panel glass portion 2 has a screen display effective frame 5 set by a black matrix on its display surface 2a. An image is displayed in the display area 6 inside the screen display effective frame 5, and a pair of extra holes is formed on the horizontal center line 110 of the panel glass part 2 on both sides of the non-display area 8 outside the screen display effective frame 5. 7 are formed. This horizontal center line 110
It is assumed to be at a position passing through the center of the display surface 2a with the outer shape of the panel glass portion 2 as a reference.

Next, a method of adjusting the raster rotation of the color cathode ray tube 1 incorporating the panel glass portion 2 will be described with reference to the explanatory view of FIG. 2 which schematically shows the adjusting process. First, the cathode ray tube 1 is operated to display the horizontal bright line 10 (FIG. 2) at the center position in the vertical direction of the display surface 2a (FIG. 1). And this horizontal bright line 10
The deflection yoke 55 is rotated and adjusted so that the pair of left and right extra holes 7 illuminate at the same time, and the deflection yoke 55 is fixed at the rotation position. Thereby, the raster rotation of the cathode ray tube 1 is adjusted.

When the raster rotation is adjusted while the color cathode-ray tube 1 is incorporated in the monitor, the horizontal bright line 10 is displayed in the same manner, and the horizontal bright line 10 is adjusted to a pair of left and right extra holes by the adjusting function of the monitor. Raster rotation can be adjusted by adjusting 10 to illuminate at the same time.

As described above, according to the color cathode-ray tube 1 of the first embodiment, since the extra hole 7 for adjusting the raster rotation is formed in the non-display area 8 of the panel glass portion 2, it is used in the manufacturing line. It is possible to adjust the raster rotation of the color cathode ray tube 1 without using a rotation adjusting jig.

For the same reason, by providing the monitor with the function of adjusting the raster rotation position even after the cathode ray tube 1 is assembled in the monitor,
It becomes possible to easily adjust the raster rotation independently.

Embodiment 2. FIG. 3 is a configuration diagram showing a main part configuration of an exposure device for carrying out the method for manufacturing the panel glass according to the second embodiment by the method for manufacturing a cathode ray tube of the present invention.

In the figure, an alignment base 21 which is integrally formed with an outer casing (not shown) of the exposure device 20 mounts the panel glass portion 2 so as to position it at a predetermined position.
The light source 27 arranged at a predetermined position inside the outer casing of the exposure device 20.
The illuminance distribution on the panel glass part 2 is adjusted at a predetermined position on the optical path between the panel glass part 2 and the mounted panel glass part 2 in parallel with the mounting surface of the panel glass 2 in order from the light source 27 side. For this purpose, a filter 22, correction lenses 23 and 24, a cover glass 25, and a light shielding plate 26 are arranged.

FIG. 4 is an external view of the light shield plate 26 as seen from the light source 27 side. As shown in FIG.
Is a rectangular plate-like member having a rectangular hollow portion 26b, and is a position where the extra hole is to be formed on the horizontal center line (corresponding to 110 in FIG. 1A) based on the outer shape of the panel glass 2 (see FIG. A pair of transmission holes 26a is formed at a position corresponding to 7 in 1 (a), that is, at a position where the passing ultraviolet light from the light source 27 hits the above-described position where the extra hole is to be formed.

A process of removing a predetermined portion of the black matrix layer formed on the inside of the display surface 2a of the panel glass 2 by exposure to ultraviolet rays in the above structure will be described.

This black matrix layer is used in the exposure device 2
After resist exposure with ultraviolet light of 0, resist development,
It is formed by graphite injection and graphite development. FIG. 5A is an operation explanatory view for explaining the optical path of ultraviolet rays at this time. As shown in FIG.
When the ultraviolet ray 30a emitted from the light source 27 at 0 passes through the filter 22 and the optical path is adjusted by the correction lenses 23 and 24, the cover glass 25 and the light-shielding plate 26 have a hollow portion 26.
b, and the slit 60a of the color selection mechanism 57 (see FIG. 8).
After passing through (a)), it reaches the panel glass 2, the resist film is exposed, resist development, graphite injection,
A stripe-shaped black matrix is formed in the display region 6 through steps such as graphite development.

Similarly, the ultraviolet rays 30b emitted from the light source 27 follow the same path and after passing through the transmission holes 26a of the light shielding plate 26, reach the panel glass 2 to expose the resist film, develop the resist, Through the steps of graphite injection, graphite development, etc., a black matrix is formed in a portion other than the portion reached by the ultraviolet rays 30b, and no black matrix is formed in the portion reached by the ultraviolet rays 30b.

Therefore, as shown in FIG. 5B, a portion of the display surface 2a of the panel glass 2 where the ultraviolet light reaches and is exposed and no black matrix is formed corresponds to the hollow portion 26b of the light shield plate 26. In the display area 6,
In the non-display area 8 corresponding to the area shielded by the light shielding plate 26, which is a portion (not shown) where the ultraviolet rays have passed through the slit 60a (FIG. 8A) of the color selection mechanism 57, a transmission hole is formed. It is the position of the extra hole 7 which has been exposed through 26a.

Incidentally, when the exposure is performed with the light shield plate 26 removed, the ultraviolet rays are only shielded by the grill 60 (FIG. 8A) of the color selection mechanism 57, as shown in FIG. 6A. Therefore, the outside of the grill 60 is exposed and the light leakage region 9 is formed without forming the extra hole 7 as shown in FIG.

After the black matrix layer is formed on the inner side of the display surface 2a of the panel glass 2 as described above, the fluorescent coating process is performed so as to be laminated on the black matrix layer. The description is omitted because it is performed by a normal method. However, since the fluorescent substance adheres to the extra hole 7 by the fluorescent coating, it is possible to emit light by the electron beam.

As described above, according to the method of manufacturing a cathode ray tube of the second embodiment, the light shielding plate 26 is provided on the ultraviolet light path of the exposure device 20, and the extra hole 7 is formed without adding a special process. The panel glass part which has can be manufactured.

In the above-described embodiment, the pair of extra holes are set on the horizontal center line 110, but the present invention is not limited to this, and they are formed on a horizontal axis parallel to the horizontal center line 110. May be.

In the above-described embodiment, the display surface 2
Although the non-display area 8a of a is formed by the black matrix layer, it is not limited to this, and various modes such as a layer capable of shielding light and capable of forming extra holes are possible.

Further, in the above description of the embodiments, the terms "upper", "lower", "left", "right" are used, but these are for convenience only and are used in the state where the cathode ray tube is arranged. It does not limit the absolute positional relationship.

[0039]

According to the cathode ray tube of the first and second aspects, since the extra hole 7 for adjusting the raster rotation is formed in the cathode ray tube itself, the rotation jig is not used in the production line. It is possible to adjust the raster rotation. Further, even when it becomes a monitor, it is possible to easily adjust the raster rotation independently by providing the monitor with an adjusting function.

According to the cathode ray tube of claim 3, the extra holes are
Since the black matrix layer is formed on the display surface in a non-display area, it is possible to avoid an increase in cost without further providing a special step for forming the extra hole.

According to the manufacturing method of claims 4 and 5, the non-display area and the pair of extra holes are formed in the panel glass portion of the cathode ray tube without increasing the number of steps only by providing the light shielding plate on the optical path of the exposure machine. Can be formed.

[Brief description of drawings]

FIG. 1 (a) is a configuration diagram showing a main configuration of a panel glass part 2 constituting a cathode ray tube according to a first embodiment of the present invention, and FIG. 1 (b) is an aperture grill system having the panel glass part 2. It is a block diagram which showed roughly the principal part structure of the color cathode ray tube.

FIG. 2 is an explanatory diagram schematically showing the adjustment process of the raster rotation adjustment method.

FIG. 3 is a configuration diagram showing a main part configuration of an exposure machine for carrying out a method for manufacturing a panel glass according to a second embodiment in a method for manufacturing a cathode ray tube of the present invention.

FIG. 4 is an external view of the light shield plate 26 viewed from the light source 27 side.

5 (a) is an operation explanatory view for explaining an optical path of ultraviolet rays of the exposure machine, and FIG. 5 (b) is an explanation for explaining an exposed region on the display surface 2a of the panel glass 2. FIG. It is a figure.

FIG. 6A is an operation explanatory view for explaining an optical path of ultraviolet rays of the exposure device in a state where the light shielding plate 26 is removed,
(B) is an explanatory view for explaining the exposed area on the display surface 2 a of the panel glass 2 at that time.

FIG. 7 is a configuration diagram schematically showing a main part configuration of a conventional general aperture grill type color cathode ray tube.

FIG. 8A is a perspective view showing a configuration of an aperture grill type color selecting mechanism, and FIG. 8B is a perspective view showing a configuration of a shadow mask type color selecting mechanism.

FIG. 9 is a configuration diagram showing a main configuration of a panel glass portion of a conventional general aperture grill type color cathode ray tube.

[Explanation of symbols]

1 aperture grill type color cathode ray tube, 2 panel glass part, 2a display surface, 3 electron beam, 5
Screen display effective frame, 6 display area, 7 extra holes, 8
Non-display area, 9 light leakage area, 10 horizontal bright line,
20 exposure machine, 21 alignment base, 22
Filter, 23, 24 Correction lens, 25 Cover glass, 26 Light shielding plate, 26a Transmission hole, 26
b hollow part, 27 light source, 30a, 30b ultraviolet ray, 50 color cathode ray tube, 51 panel glass part,
51a display surface, 51b skirt portion, 52 funnel portion, 53 neck portion, 54 electron gun, 5
5 deflection yoke, 56 phosphor screen, 57 aperture grill type color selection mechanism, 58 explosion-proof band, 60 grill, 60a slit forming part, 61 frame,
63 shadow mask type color selection mechanism, 64 curved surface part, 65 electron beam transmitting hole, 66 extra hole.

Claims (5)

[Claims] 1. A panel glass part having a display surface of an aperture grille type color cathode ray tube, wherein the panel glass part is provided in a non-display area formed in a peripheral portion of a display area on the display surface where an image is displayed. On the horizontal axis of the display surface with reference to the outer shape of the display area, at least a pair of extra holes that sandwich the display area and can be confirmed from outside the cathode ray tube to emit light when receiving an electron beam are formed. And a cathode ray tube. 2. The cathode ray tube according to claim 1, wherein the extra hole is formed on the assumption that the horizontal axis passes through substantially the center of the display surface. 3. The cathode ray tube according to claim 1, wherein the non-display area is formed of a black matrix layer, and the extra hole is formed by providing a hole through which light is transmitted in the black matrix layer. 4. The manufacturing method for manufacturing a cathode ray tube according to claim 3, wherein the exposure is performed by exposing the black matrix layer formed on the inner surface of the display surface of the panel glass portion with ultraviolet light. When forming the region and the pair of extra holes, a light shielding plate having a transmissive hole where the transmitted ultraviolet rays hit the position of the pair of extra holes is arranged on the optical path from the light source to the display surface for exposure. A method for manufacturing a characteristic cathode ray tube. 5. The light shielding plate has a hollow portion, and the ultraviolet rays transmitted through the hollow portion further pass through a slit portion of an aperture grill type color selection mechanism arranged in the panel glass portion. The method of manufacturing a cathode ray tube according to claim 4, wherein the cathode ray tube touches a predetermined portion of the display area.