JP2000003682A - Color selection electrode device and color cathode ray tube - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce a decrease in tension of a color selection electrode assembly after a blackening process in a color selection electrode device used for a color cathode ray tube. SOLUTION: This is a color selection electrode device comprising a color selection electrode assembly 2 composed of an electrode strip 2a stretched over a color selection electrode frame 3, wherein the electrode strip 2a of the color selection electrode assembly 2 is provided. The electrode strip tension adjusting jig 18 is arranged on the color selection electrode frame 3 so as to be parallel to the above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color selection electrode device capable of adjusting and controlling the tension of an electrode strip of a color selection electrode assembly, and a color cathode ray tube provided with the color selection electrode device.

[0002]

2. Description of the Related Art Conventionally, as a color selection electrode device of a color cathode ray tube, a device using a shadow mask and an electrode strip for color separation are used, and an electron beam transmission hole is provided between each adjacent electrode strip. And a color selecting electrode structure formed by forming a slit-shaped opening. This color selection electrode assembly is stretched over a frame, and furthermore, a damper wire and a spring for supporting the panel are attached to form a color selection electrode device, and this color selection electrode device is attached to the inner surface of the side wall on the panel side. A structured color cathode ray tube has been proposed.

[0003] Such a color cathode ray tube is a Trinitron (Sony®) type color cathode ray tube having features such as an electron gun, a stripe phosphor screen, and a color selection electrode assembly.
The three electron beams from the electron gun are pre-focused and then main-focused by the main lens unit, converged on the central axis, and passed through a convergence deflector to form a slit-shaped electrode of the color selection electrode assembly of the color selection electrode device. Pass through the opening. The three electron beams, which are color-selected by the aperture, strike the R (red), G (green), and B (blue) stripe-shaped phosphors formed on the inner surface of the panel to emit three primary colors. I have.

A color selection electrode device used for a color cathode ray tube as described above is called an aperture grill (AG).
As shown in FIG. 17, the color selection electrode assembly 2, the frame 3, the spout support plate 5 and spout 4, STC (Self thermal)
compensator) 6.

[0005] The color selection electrode assembly 2 has a slit-shaped opening serving as an electron beam transmission hole, using a photoresist patterned on a thin metal plate such as mild steel as a mask at the time of etching. The color selection electrode assembly 2 includes about 300 to 1500 electrode strips 2a formed between the openings,
And a welding plate 2b for vertically supporting the electrode strip 2a.

[0006] A frame 3 called a frame for giving the color selection electrode assembly 2 an appropriate tension has a frame member 3a and 3b which are disposed at the top and bottom of an L-shaped cross section, and a square member and the like are substantially U-shaped. The arm members 3c and 3d are formed into substantially rectangular shapes by welding the arm members 3c and 3d to the left and right ends of the frame members 3a and 3b.

The frame members 3a and 3b and the arm member 3c
And 3d are welded with a sprung support plate 5 #, one end of the sprout 4 for holding a pin protruding from the inner surface of the panel glass is welded to the sprung support plate 5 #, and the STC 6 is further connected to the arm members 3c, 3d. To compensate for the color purity deterioration of the color electron beam caused by the thermal expansion of the color selection electrode device 1.

FIG. 18 shows an example of an assembled state diagram of the color selecting electrode device 1 as described above. In FIG. 18, the sprung support plate 5, sprout 4, STC 6, etc. are omitted for simplicity, but damper sprungs 8 are further welded to the left and right arm members 3c and 3d, and the color between the left and right damper splines 8 and 8 is Sorting electrode assembly 2
The damper wires 7a and 7b are locked in a direction (horizontal scanning line direction) orthogonal to the longitudinal direction of the electrode strip 2a, thereby preventing the electrode strip 2a from resonating due to external vibration and causing a color shift. Wires 7a and 7b stretched so as to extend
Is used to suppress resonance.

When the above-described color selection electrode assembly 2 is welded to the frame members 3a and 3b of the frame 3, the welding of the color selection electrode assembly 2 is performed as shown in FIG. The width W1 of the welding plate portion 2b is selected such that the substantially central portion of the plate portion 2b is further inward (rightward in FIG. 19) from the end surface 10a of the vertical piece 10 of the frame members 3a and 3b.

When the color selection electrode assembly 2 is welded to the frame 3, the arm members 3c and 3d are welded to the frame members 3a and 3b to form a rectangular frame 3, and then the frame member 3a shown in FIG. And 3b, a compressive load is applied from above and below, the color selection electrode assembly 2 is held by a color selection electrode holding jig, the color selection electrode assembly 2 is brought onto the frame 3, and a welding plate for the color selection electrode assembly 2 is provided. The part 2b is welded to the top of the vertical piece 10 of the frame members 3a and 3b. Thereafter, the compressive load is removed, and an extra portion of the color selection electrode assembly 2 is cut off, and the electrode strip 2 having a predetermined tension is applied.
The color selection electrode device 1 having “a” is obtained. The tension applied at this time is such that when the color selection electrode device is mounted in the cathode ray tube, even if vibration or impact is applied from the outside of the cathode ray tube, the vibration as a string of the electrode strip 2a is suppressed, and It is set to minimize the deviation.

Such a color selection electrode device 1 is used as a mask for exposing R, G, B phosphor stripes and carbon stripes on the inner surface of the panel of the color cathode ray tube. That is, as shown in FIG. 11, the phosphor screen exposure light 12 is transmitted to the slit-like opening 11 of the electrode strip 2a of the color selection electrode assembly 2.
To form R, G, and B phosphor screens 13 on the inner surface of the panel 14. Reference numeral 15 denotes a carbon stripe serving as a light absorbing layer.

[0012]

The above-described color selection electrode device 1 is provided as a pretreatment used as an exposure mask in the manufacturing process of the color selection electrode device 1 (before attaching the strip 4). Annealing to remove various welding distortions and molding distortions and Fe for anti-corrosion and anti-reflection called blackening treatment
Iron oxide such as O, Fe ₃ O _4, etc.
Is sent to the blackening treatment step to be applied to the surface of. In this blackening process, annealing is performed in a furnace and heat is applied, so that the tension applied to the electrode strip 2a with a predetermined distribution before the blackening process as shown in FIG. (Curve I) lowers the tension due to the release of strain by annealing as shown in curve (II). Originally, sufficient tension is applied before blackening in anticipation of the decrease in tension due to blackening. However, variations in the heat treatment temperature during the blackening process, the frame 3 that forms the color selection electrode device 1, and the color If there is a variation in the material characteristics of the selection electrode assembly 2, the value will be lower than the predetermined tension after the blackening process.

Due to the tension applied to the electrode strip 2a, the electrode strip 2a is provided with a resonance frequency from the relationship of the equation (1).

[0014]

(Equation 1)

[0015] If the tension lowers and the state of resonating with shock and vibration from the outside of the cathode ray tube occurs,
The electrode strip 2a vibrates as shown in FIG. Due to this, the opening 11 between the electrode strips 2a is displaced, and as shown in FIG. 14, the electron beam 31 selectively incident by the color selecting electrode device 1 to reach the predetermined phosphors R, G, B. As shown in FIG. 15, a phenomenon in which the electron beams 31R, 31G, and 31B instantaneously reach a non-predetermined phosphor or a predetermined phosphor is repeated during the string vibration of the electrode strip 2a. For this reason, as shown in FIG. 16, there is a problem that a disturbance 21 occurs on the display screen 20 and the high-definition image quality is significantly deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to obtain a color selection electrode device which has solved the above-mentioned problems, and an object to be solved by the invention is to perform a blackening process of an electrode strip of a color selection electrode assembly. An object of the present invention is to provide a color selection electrode device and a color cathode ray tube capable of preventing display screen disturbance by correcting and adjusting the lowered tension to a predetermined value and suppressing the electrode strip vibration.

[0017]

In the color selection electrode device according to the present invention, an electrode strip tension adjusting jig is arranged on the color selection electrode frame so as to be parallel to the electrode strip of the color selection electrode assembly. It is assumed to be a configuration provided.

A color cathode ray tube according to the present invention is provided with the above-described color selection electrode device.

In the above-described color-selecting electrode apparatus of the present invention, after the color-selecting electrode assembly is blackened, a tensile load is applied to the color-selecting electrode assembly by the electrode strip tension adjusting jig, and the color-selecting electrode assembly is removed. Further tension is applied to the electrode strip to maintain a predetermined tension. In the above-described color cathode ray tube of the present invention, by providing the color selection electrode of the present invention, a predetermined tension can be applied to the electrode strip even after the blackening treatment of the color selection electrode assembly, and the electrode strip can be provided. Stripe vibration is suppressed, and display screen disturbance can be prevented.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A color selection electrode device according to the present invention
What is claimed is: 1. A color selection electrode device comprising a color selection electrode assembly comprising an electrode strip stretched over a color selection electrode frame, wherein an electrode strip is parallel to an electrode strip of the color selection electrode assembly. The body tension adjusting jig is arranged on the color selection electrode frame.

This electrode strip tension adjusting jig can be composed of an outer tightening nut, an outer tightening washer, an inner tightening nut, an inner tightening washer, and a tension adjusting bolt. The electrode strip tension adjusting jig is disposed at a position corresponding to the outside of the phosphor screen region of the color selection electrode frame.

Further, the electrode strip tension adjusting jig can be disposed on the color selection electrode frame after the color selection electrode structure is blackened.

In the color cathode ray tube according to the present invention, the above-described color selection electrode device, that is, a color selection electrode structure composed of an electrode strip is stretched over the color selection electrode frame so as to face the phosphor screen on the inner surface of the panel. The color selection electrode frame includes a color selection electrode device in which an electrode strip tension adjusting jig is provided so as to be parallel to the electrode strip of the color selection electrode assembly.

Also in this case, as described above, the electrode strip tension adjusting jig can be composed of an outer tightening nut, an outer tightening washer, an inner tightening nut, an inner tightening washer, and a tension adjusting bolt. The electrode strip tension adjusting jig is also provided at a position corresponding to the outside of the phosphor screen area of the color selection electrode frame. Further, in the color cathode ray tube according to the present invention, the electrode strip tension adjusting jig is provided with a color selection electrode device disposed on the color selection electrode frame after the blackening process of the color selection electrode assembly.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of the color selection electrode device of the present invention. In FIGS. 1 to 3, the same reference numerals are given to the portions corresponding to those of the conventional configuration described with reference to FIGS.

The color selection electrode device 411 according to the present embodiment
Is a pair of frame members 3a and 3b facing each other as described above.
And a pair of arm members 3c and 3d facing each other, which are welded between left and right ends of the frame members 3a and 3b. The color selection electrode frame 2 is stretched with a predetermined tension. The color selecting electrode assembly 2 has a large number of electrode strips 2a arranged at a predetermined pitch along the horizontal direction of the screen.
A slit-shaped opening (a so-called electron beam transmitting hole) 11 which is long in the vertical direction of the screen is formed between the electrodes a.
Is provided with a welding plate portion 2b for vertically supporting the plate.
The welding plate portions 2b at both ends of the color selection electrode assembly 2
Are welded to the frame members 3a and 3b, and the electrode strip 2a is stretched with a predetermined tension.

In the color selection electrode device 411 according to this embodiment, in particular, both frame members 3a of the frame 3 are provided.
And 3b, that is, at the positions corresponding to the outside of the phosphor screen area formed on the inner surface of the panel of the cathode ray tube, respectively,
2 is formed (see FIG. 2), and an electrode strip tension adjusting jig 18 for adjusting the tension of the electrode strip 2a of the color selection electrode assembly 2 is arranged so as to be inserted into the hole 42. It is configured by setting.

The electrode strip tension adjusting jig 18 is provided between the frame members 3a and 3b of the frame 3 so as to extend in parallel with the electrode strip 2a. 42
, And outer tightening nuts 18a and 18b, outer tightening washers 18c and 18d, and inner tightening nut 1 for tightening and fixing the tension adjusting bolt 18i to the frame members 3a and 3b, respectively.
8e, 18f and inner fastening washers 18g, 18
h.

In the color selection electrode device 411, first, the color selection electrode assembly 2 is welded to the frame 3 with a required tension and stretched, that is, the electrode strip tension adjusting jig 18 is attached to the frame 3.
The blackening process is performed without mounting.

Next, after the blackening process, the frame members 3a, 3b
The inner tightening nuts 18e and 18f, the inner tightening washers 18g and 18g are arranged in the holes 42 previously opened so as to be parallel to the color selecting electrode strips 2a of the color selecting electrode assembly 2.
After arranging the tension adjusting bolt 18i to which 18h is attached, the outer fastening washers 18c and 18d and the outer fastening nuts 18a and 18b are attached (see FIG. 3A). Then, the outer tightening nuts 18a, 18b and the inner tightening nuts 18e, 18 at one end of the tension adjusting bolt 18i.
After tightening f, the other inner tightening nut is rotated so as to press it against the frame members 3a and 3b to apply a tensile load in the up and down direction of the frame 3 so that the electrode strips of the color selection electrode assembly 2 are turned. After further tension is applied to 2a, the outer clamping bolts are tightened. That is, for example, one outer fastening nut 18b and the inner fastening nut 1
8f and tighten one end of the tension adjusting bolt 18i with the frame member 3.
b, the other inner tightening nut 18e is rotated so as to press against the other frame member 3a, and further tension is applied to the electrode strip 2a, and then the other outer tightening nut 18a is tightened. Thereby, the color selection electrode device 41 having the color selection electrode strips ensuring the predetermined tension.
1 is obtained (see FIGS. 1 and 3B).

FIGS. 4 and 5 show another embodiment of the color selection electrode device of the present invention. In the color selection electrode device 412 according to the present embodiment, notches 43 are provided in advance at the ends of the frame members 3a and 3b of the frame 3, and the same electrode strip tension as described above is applied to the notches 43. This is a case where the adjustment jig 18 is mounted. The electrode strip tension adjusting jig 18 is also mounted after the color selection electrode assembly 2 is blackened. Other configurations are the same as those in FIGS.

FIGS. 6 and 7 show still another embodiment of the color selection electrode device of the present invention. In the color selection electrode device 413 according to the present embodiment, holes 44 are provided in advance at both ends of each of the arm members 3c and 3d of the frame 3, and the same electrode strip tension adjustment as described above is provided in the holes 44. This is a case where a jig 18 is mounted. The electrode strip tension adjusting jig 18 is also mounted after the color selection electrode assembly 2 is blackened. Other configurations are the same as those in FIGS.

FIGS. 8 and 9 show still another embodiment of the color selection electrode device of the present invention. In the color selection electrode device 414 according to the present embodiment, notches 45 are provided in advance at both ends of the arm members 3c and 3d of the frame 3, and the notches 45 are provided in advance.
This is a case where the same electrode strip tension adjusting jig 18 as described above is attached to the apparatus. This electrode strip tension adjusting jig 18
Are also mounted after the blackening processing of the color selection electrode assembly 2. Other configurations are the same as those in FIGS.

In each of the above embodiments, since the electrode strip adjusting jig 18 is disposed so as to be in contact with the color selecting electrode assembly 2, the electron beam 31 (see FIG. 14) emitted from the cathode or the Is to prevent the electrode strip tension adjusting jig 18 from being projected on the phosphor screen when the phosphor exposure light 12 (see FIG. 11) during the phosphor exposure is transmitted through the color selection electrode assembly 2. As shown in FIG. 10, the distance Xb in the horizontal direction of the screen between the two electrode strip tension adjusting jigs 18 is set to be longer than the range of the horizontal length Xa of the fluorescent screen 20 of the color cathode ray tube panel 14. It should be done.

The color cathode ray tube according to the present embodiment has the above-described color selection electrode devices 411, 412, 413.
And 414 are arranged so as to face the phosphor screen on the inner surface of the panel.

According to the present invention, in order to correct and adjust the tension of the electrode strip 2a, which decreases after the blackening treatment, as described above, a tensile load is applied to the frame 3 by the electrode strip tension adjusting jig 18. In addition, the color selection electrode devices 411, 412, 413, 414 in which the string vibration of the electrode strip 2a is suppressed can be easily configured.

Further, such a color selection electrode device 411,
By forming a color cathode ray tube using 412, 413 or 414, the electrode strips of the color selection electrode device are less likely to sway even by shocks and vibrations from the outside of the cathode ray tube, and display screen disturbance is suppressed. A high quality color cathode ray tube can be provided.

[0039]

According to the color selection electrode apparatus of the present invention, the electrode strip tension adjusting jig is attached to the color selection electrode frame after the blackening treatment, and the tension is applied to the electrode strip of the color selection electrode assembly. Is applied, the reduced tension can be recovered to a predetermined tension after the blackening process. Therefore, it is possible to provide a color selection electrode device which is not easily shaken by the impact or vibration from the outside of the cathode ray tube. Further, according to the color cathode ray tube of the present invention, by providing the color selection electrode device that is less likely to fluctuate, the display screen is less likely to be disturbed even when subjected to external shock or vibration. Therefore, it is possible to provide a high-quality color cathode ray tube that can withstand external shocks and vibrations.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a color selection electrode device according to the present invention.

FIG. 2 is a configuration diagram of a main part of a frame of the color selection electrode device of FIG. 1;

FIG. 3A is an explanatory view of mounting of an electrode strip tension adjusting jig of the color selection electrode device of FIG. 1; B is a completed view of the color selection electrode device of FIG. 1.

FIG. 4 is a configuration diagram of a main part of a frame of another embodiment of the color selection electrode device according to the present invention.

FIG. 5A is an explanatory view of mounting of an electrode strip tension adjusting jig according to the color selection electrode device of FIG. 4; B It is a block diagram showing yet another embodiment of the completed color selection electrode device according to the present invention.

FIG. 6 is a configuration diagram of a main part of a frame of still another embodiment of the color selection electrode device according to the present invention.

FIG. 7A is an explanatory diagram of mounting of an electrode strip tension adjusting jig according to the color selection electrode device of FIG. 6; B It is a block diagram showing yet another embodiment of the completed color selection electrode device according to the present invention.

FIG. 8 is a configuration diagram of a main part of a frame of still another embodiment of the color selection electrode device according to the present invention.

FIG. 9A is an explanatory view of mounting of an electrode strip tension adjusting jig according to the color selection electrode apparatus of FIG. 8; B It is a block diagram showing yet another embodiment of the completed color selection electrode device according to the present invention.

FIG. 10 is an explanatory view of the arrangement of the electrode strip tension adjusting jig of the present invention.

FIG. 11 is an explanatory view of exposure of a phosphor screen.

FIG. 12 is an explanatory diagram of a tension distribution of a color selection electrode assembly.

FIG. 13 is an explanatory diagram of a vibration state of a color selection electrode assembly.

FIG. 14 is an explanatory diagram of an electron beam sorting state by the color sorting electrode device.

FIG. 15 is an explanatory diagram of an electron beam selection state when an electrode strip of a color selection electrode assembly vibrates.

FIG. 16 is an explanatory diagram of display screen disorder.

FIG. 17 is a configuration diagram of a conventional color selection electrode device.

FIG. 18 is an assembly view of a conventional color selection electrode device.

19 is an enlarged view of a portion A in FIG.

[Explanation of symbols]

1,411,412,413,414 {color selection electrode device, 2} color selection electrode assembly, 2a {electrode strip, 3}
{Frame member, 3a, 3b} Frame member, 3c, 3d {Arm member, 18} Electrode strip adjusting jig, 18a, 18b}
Outer tightening nut, 18c, 18d {outer tightening washer, 18e, 18f} inner tightening nut,
18g, 18h {Inner fastening washer, 18i}
{Tension adjustment bolts, 42, 44} Holes, 43, 45}
‥ Notch

Claims (8)

[Claims] 1. A color selection electrode device comprising a color selection electrode assembly composed of an electrode strip stretched over a color selection electrode frame, wherein the color selection electrode apparatus is provided in parallel with the electrode strip of the color selection electrode assembly. So that
A color selecting electrode device, wherein an electrode strip tension adjusting jig is provided on the color selecting electrode frame. 2. The electrode strip tension adjusting jig comprises an outer tightening nut, an outer tightening washer, an inner tightening nut, an inner tightening washer, and a tension adjusting bolt, and is located outside the fluorescent screen area of the color selection electrode frame. The color selection electrode device according to claim 1, wherein the color selection electrode device is provided at a corresponding position. 3. The color selection electrode device according to claim 1, wherein the electrode strip tension adjusting jig is provided after a blackening process of the color selection electrode assembly. 4. The color selection electrode device according to claim 2, wherein the electrode strip tension adjusting jig is provided after a blackening process of the color selection electrode assembly. 5. A color selection electrode structure comprising an electrode strip is stretched over a color selection electrode frame, and the color selection electrode frame is parallel to the electrode strip of the color selection electrode assembly. A color cathode ray tube comprising a color selecting electrode device provided with an electrode strip tension adjusting jig. 6. The electrode strip tension adjusting jig includes an outer tightening nut, an outer tightening washer, an inner tightening nut, an inner tightening washer, and a tension adjusting bolt, and corresponds to a portion outside the fluorescent screen area of the color selection electrode frame. 6. The color cathode ray tube according to claim 5, wherein the color cathode ray tube is disposed at a predetermined position. 7. The color cathode ray tube according to claim 5, wherein said electrode strip tension adjusting jig is provided after a blackening process of said color selection electrode assembly. 8. The color cathode ray tube according to claim 6, wherein said electrode strip tension adjusting jig is provided after a blackening process of said color selection electrode assembly.