JPH10162749A - Color picture tube device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color picture tube device by which an irregular color is hardly caused even if an irradiation error in an electron beam increases by forming respective phosphors of three colors in a stripe shape substantially parallel to the long side of a front panel part, forming a color selecting through hole of a shadow mask as a long hole, and setting the major axis of this long hole substantially parallel to the long side of the front panel part. SOLUTION: In a fluorescent screen, phosphors 21B, 21G and 21R of three colors of blue, green and red are repeatedly arranged in order in the short side direction of a front panel part, and the respective phosphors of three colors are formed in a stripe shape substantially parallel to the long side direction X of the front panel part, and a stripe shaped-black film 21BK is formed between the respective phosphors. A color selecting through hole 14 of a shadow mask is a substantially rectangular long hole, and the major axis of the long hole is set substantially parallel to the long side direction X. In this way, since a tolerance of beam landing in the long side direction X of the front panel part is expanded, an irradiation error in an electron beam is absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube device used for a television receiver, a computer display and the like.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional color picture tube apparatus comprises a glass bulb 3 having a rectangular front panel portion 1 and a neck portion 2 having a fluorescent surface on the inner surface, and a fluorescent lamp of the front panel portion 1. A shadow mask 5 having a large number of through holes 4 for color selection arranged close to the surface, a frame 6 supporting the shadow mask 5, and a color selection of the shadow mask 5 disposed in the neck 2 of the glass bulb 3. An in-line type electron gun 7 for irradiating the phosphor screen of the front panel unit 1 with an electron beam through the through hole 4 and an outer peripheral surface of the glass bulb 3 are provided. And a deflecting device (not shown) for deflecting and scanning. As shown in FIG. 5, the phosphor screen of the front panel unit 1 has phosphors 1 R, 1 G, and 1 B of three colors of red, green, and blue arranged repeatedly in the long side direction X of the front panel unit 1 in order. Each of the phosphors 1R, 1G, and 1B
Is formed in a stripe shape in parallel with the short side direction Y, and a stripe-like black film 1 is formed between each phosphor.
BK is formed. The color selection through hole 4 of the shadow mask 5 is a long hole parallel to the short side direction Y of the front panel portion 1. In addition, a color image is obtained by scanning the electron beam in the long side direction X of the front panel unit 1 with the deflecting device.

In recent years, the color picture tube device has an aspect ratio (aspect ratio) of 16:16 while the size and the brightness are increasing.
Nine horizontally long type wide tubes have become mainstream.

[0004]

However, in such a conventional color picture tube apparatus, as shown in FIG.
Each of the three color phosphors 1R, 1G, and 1B is formed in a stripe shape in parallel with the short side direction Y of the front panel portion 1, and the color selection through holes 4 are formed in the short side direction Y of the front panel portion 1. Since the holes are formed in parallel holes, the mounting error margin δ in the long side direction X of the front panel portion 1 is small.
7, the mounting error of the shadow mask 5 with respect to the front panel unit 1 and the irradiation of the electron beam 7a from the center of the long side of the front panel unit 1 shown in FIG. Local doming of the mask 5 occurs, and the relative displacement λ and the like of the color selection through hole 4 with respect to a predetermined phosphor of the front panel portion 1 caused by the occurrence of the doming increase, thereby causing a large electron beam irradiation error. There is a problem that mislanding of the electron beam is caused and color unevenness occurs. This problem is particularly likely to occur in a horizontally long wide tube.

An object of the present invention is to provide a color picture tube device in which color unevenness is unlikely to occur even when the electron beam irradiation error increases.

[0006]

SUMMARY OF THE INVENTION A color picture tube apparatus according to the present invention comprises a glass bulb having a rectangular front panel having a fluorescent screen formed on an inner surface thereof, and a plurality of colors arranged in close proximity to the fluorescent screen. A shadow mask having a through-hole for selection, a frame supporting the shadow mask, and arranged in the glass bulb, for irradiating the phosphor screen with an electron beam through the through-hole for color selection of the shadow mask. In a color picture tube device comprising an electron gun and a deflection device arranged on an outer peripheral surface of the glass bulb and for deflecting and scanning the electron beam in a horizontal direction and a vertical direction, the fluorescent screen is formed on the front panel. Phosphors of three colors are sequentially and repeatedly arranged in the short side direction of the portion, each of the phosphors of the three colors is formed in a stripe shape substantially parallel to a long side of the front panel portion, and Serial color sorting hole of the shadow mask is a long hole, in which the major axis of the elongated hole is substantially parallel to the long sides of the front panel unit.

With this configuration, that is, the three-color striped phosphor of the front panel formed substantially parallel to the long side of the front panel and the through-hole for color selection of the shadow mask, the front panel is formed. In the peripheral portion on the long side end side, even if the irradiation error of irradiating the predetermined phosphor position with the electron beam through the color selection through hole of the shadow mask becomes large, the irradiation error of the electron beam is absorbed.

[0008]

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

As shown in FIG. 2, a color picture tube device according to an embodiment of the present invention has a rectangular front panel portion 10 having a fluorescent screen 9 on its inner surface, a funnel-shaped funnel portion 11, and a cylindrical neck portion. A shadow mask 15 made of an iron material having a large number of through holes 14 for color selection arranged in the vicinity of the fluorescent screen 9 and a frame made of an iron material supporting the shadow mask 15. 16, support means 18 for supporting the frame 16 on the skirt 17 of the front panel 10, and the fluorescent screen 9 disposed in the neck 12 of the glass bulb 13 via the color selection through hole 14 of the shadow mask 15. Gun 19 for irradiating an electron beam on the glass and the funnel 1 of the glass bulb 13
A deflecting device 20 for deflecting and scanning the electron beam in the horizontal and vertical directions, which is disposed on the outer peripheral surface of the neck 1 and the neck portion 12.

As shown in FIG. 3, the phosphor screen 9 is provided with phosphors 21 of three colors of blue, green and red in the short side direction of the front panel 10.
B, 21G, and 21R are sequentially and repeatedly arranged, and each of the three color phosphors 21B, 21G, and 21R is placed on the front panel unit 1.
0 is formed in a stripe shape substantially parallel to the long side direction X,
The stripe-shaped black film 21BK is formed between each phosphor. Shadow mask 15
Is a substantially rectangular long hole,
The long axis of the long hole is substantially parallel to the long side direction X of the front panel portion 10.

As shown in FIG. 1, an electron gun 19 is an inline array type electron gun that generates three electron beams 19B, 19G, and 19R.
Are arranged substantially parallel to the short side direction Y. Then, the electron beams 19B and 19B are deflected by the deflecting device 20 shown in FIG.
G and 19R are main-scanned in the short side direction Y of the front panel section 10 and sub-scanned in the long side direction X of the front panel section 10, and the predetermined phosphor 21B is passed through the color selection through hole 14 of the shadow mask 15. , 21G, and 21R to obtain a color image.

Next, the operation and effect of the color picture tube device will be described. In the color picture tube device according to the embodiment of the present invention, the mounting error of the shadow mask 15 with respect to the front panel portion 10 and the localization of the shadow mask 15 in the peripheral portion on the long side end side of the front panel portion 10 as shown in FIG. Even if the relative displacement λ and the like of the color selection through-hole 14 with respect to a predetermined phosphor of the front panel unit 10 caused by the doming increase and the electron beam irradiation error increases, as shown in FIG. , Three color phosphors 21B, 21
The long axes of the long holes of the stripe-shaped portions of G, 21R and the through holes 14 for color selection are made parallel to the long side direction X of the front panel portion 1, and the beam landing latitude in the long side direction X of the front panel portion 1 is reduced. The electron beams 19B, 19G,
Irradiation errors of 19R are absorbed, and color unevenness can be reduced.

Next, an embodiment in which the effect of the present invention has been confirmed will be described. The color picture tube apparatus of the present invention having the configuration shown in FIGS. 1 to 3 uses a 28-inch 106 ° wide tube (aspect ratio is 16: 9) and uses three color phosphors 21.
The width of each of the stripe-shaped portions in B, 21G and 21R is 0.16 mm, the width of the stripe-shaped portion in the black film 21BK is 0.096 mm, the long side of the color selection through-hole 14 is 0.91 mm, and the short side is What was set to 0.195 mm was used.

For comparison, a 28-inch 106 ° wide tube (having an aspect ratio of 1) having the structure shown in FIG.
6: 9), the width of each of the stripe portions in the three color phosphors 1B, 1G, and 1R is 0.16 mm, and the width of each of the stripe portions in the black film 1BK is 0.096 mm.
A conventional color picture tube device having a long side of 0.91 mm and a short side of 0.195 mm was also manufactured.

When the color unevenness was examined by using a Mac Adam color difference meter at the center of the long side and the end of the long side around the front panel, the following results were obtained.

In the color picture tube device of the present invention, the color unevenness is 7 MPCD at the center of the long side of the front panel portion and 0 M at the long side end.
In the conventional color picture tube device, color unevenness was 0 MPCD at the center of the long side of the front panel portion and 25 MPCD at the end of the long side. Therefore, in the color picture tube device of the present invention, as compared with the conventional color picture tube device, the color unevenness is reduced over the entire area of the front panel portion, and is particularly reduced at the long side end portion of the front panel portion. I understand.

That is, in the color picture tube device of the present invention, the relative position between the color selection through hole of the shadow mask at the time of manufacture and the predetermined phosphor of the front panel portion is located at the long side end of the front panel portion. Even if there is a shift or an irradiation error of irradiating a predetermined phosphor position with an electron beam through the color selection through hole of the shadow mask, etc., the stripe-shaped portions of the three color phosphors and the color selection through hole will not be formed. Since the long axis of the long hole is formed substantially parallel to the long side of the front panel portion, the above-described positional deviation, irradiation error, and the like are absorbed. As a result, color unevenness can be reduced.

In the color picture tube apparatus according to the embodiment of the present invention, the material of the shadow mask 15 is an iron material, and the material of the shadow mask 15 is made of iron whose thermal expansion coefficient is 1/10 of iron. An alloy with nickel or a heavy metal substance whose atomic number exceeds 70, such as bismuth oxide, which suppresses the temperature rise of the shadow mask 15 by reflecting or emitting electron energy, is used for the color selection holes 1 of the shadow mask 15.
4 may be applied to the inner surface. In any of the above cases, local doming of the shadow mask 15 can be reduced, color unevenness can be reduced, and the color selection through holes 14 of the shadow mask 15 and the predetermined phosphors 21B, 2 of the front panel 10 can be reduced.
The relative displacement tolerance with respect to 1G and 21R can be further increased. Further, the color picture tube device according to the embodiment of the present invention includes the color selection through hole 1 of the shadow mask 15.
4 is a case where the shape of the long hole is rectangular, but is not limited thereto.
An elliptical or rectangular corner may be chamfered.

[0019]

As described above, according to the present invention, the phosphor screens of three colors are sequentially arranged in the short side direction of the front panel portion, and each of the three color phosphors is placed on the front panel portion. Formed in a stripe shape substantially parallel to the long side, and the color selection through hole of the shadow mask is a long hole, and the long axis of the long hole is substantially parallel to the long side of the front panel portion. Thereby, color unevenness can be reduced, and the relative positional deviation tolerance between the color selection through-hole of the shadow mask and the predetermined phosphor on the front panel can be increased.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a color picture tube device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a front view of the main part.

FIG. 4 is a front sectional view of a conventional color picture tube device.

FIG. 5 is a front view of the main part.

FIG. 6 is an operation diagram of the embodiment of the present invention and a conventional color picture tube device as viewed from above.

FIG. 7 is an operation diagram of the apparatus viewed from a side.

[Explanation of symbols]

 Reference Signs List 9 phosphor screen 10 front panel section 13 glass bulb 14 through hole for color selection 15 shadow mask 16 frame 19 electron gun 19B, 19G, 19R electron beam 20 deflector 21B, 21G, 21R phosphor of three colors

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI H04N 9/28 H04N 9/28 Z

Claims (3)

[Claims] 1. A glass bulb having a rectangular front panel portion having a fluorescent surface formed on an inner surface thereof, a shadow mask having a plurality of color selection through holes disposed close to the fluorescent surface, and the shadow mask. A frame for supporting an electron gun for irradiating the phosphor screen with an electron beam through the color selection through-hole of the shadow mask, which is disposed in the glass bulb, and disposed on an outer peripheral surface of the glass bulb. And a deflecting device for deflecting and scanning the electron beam in a horizontal direction and a vertical direction.
The color phosphors are sequentially and repeatedly arranged, each of the three color phosphors is formed in a stripe shape substantially parallel to a long side of the front panel portion, and the color selection through hole of the shadow mask has a long shape. A color picture tube device, wherein the long axis of the long hole is substantially parallel to the long side of the front panel portion. 2. The color image receiving apparatus according to claim 1, wherein said electron gun assembly has an electron gun arranged in-line, and said in-line arrangement is substantially parallel to a short side of said front panel portion. Tube equipment. 3. The color picture tube device according to claim 1, wherein a scanning line direction of the electron beam by the deflecting device is a short side direction of the front panel portion.