JP3054007B2 - Color cathode ray tube with in-line type electron gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube, and more particularly to a color cathode ray tube having an in-line type electron gun configured to emit three electron beams in a horizontal line toward a phosphor screen. .

[0002]

2. Description of the Related Art In recent color cathode ray tubes, an in-line type electron gun is generally used. This in-line type electron gun has a plurality of (usually 3) on a common plane (horizontal plane).
The electron beam of the present invention is emitted in a horizontal line, and a color image is reproduced by the plurality of electron beams on the phosphor screen of the cathode ray tube.

FIG. 9 is a schematic cross-sectional view showing a schematic structure of a conventional color cathode ray tube having an in-line type electron gun, which is cut in a tube axis direction, where 10 is a panel portion, 20 is a funnel portion, 30 is a neck portion, Numeral 40 denotes a fluorescent screen formed on the inner surface of the panel portion, numeral 50 denotes a shadow mask as a color selection electrode, and numeral 60 denotes a deflection yoke externally attached to the funnel portion.

[0004] Reference numeral 1 denotes an in-line type electron gun (hereinafter simply referred to as an electron gun) housed in a neck portion 30.
G and B indicate electron beams for red, green and blue.

In FIG . 9 , three electron beams R, G, and B emitted in a horizontal row from the electron gun 1 are deflected in the horizontal and vertical directions by a deflection yoke 60, subjected to color selection by a shadow mask 50, and subjected to fluorescence. A two-dimensional image is reproduced by projecting on the surface 40 and causing it to emit light.

FIG. 10 is a sectional view of an essential part for explaining an in-line type electron gun used in this type of cathode ray tube, and shows a neck portion in the direction of arrow a from line AA in FIG.

In FIG . 10 , 2R, 2G and 2B are cathodes, 3 is a G1 electrode, 4 is a G2 electrode, 5 is a G3 electrode constituting a main lens, and 6 is a G4 electrode which is another electrode constituting a main lens. , 7, 8, 9 are the central axes of the electron beam,
Reference numerals 12, 13, and 14 denote inner cylinders connected to the opening of the G3 electrode 5, and reference numerals 15, 16, and 17 denote inner cylinders connected to the opening of the G4 electrode 6.

The center axis of the electron beam is G1 electrode 3, G1
The openings correspond to the respective cathodes of the two electrodes 4 and the G3 electrode 5 (that is, the electron beam passage holes), and coincide with the central axes of the inner cylinders 12, 13, and 14 connected to the openings of the G3 electrode 5. , On a common plane.

The central aperture of the G4 electrode 6 and the central axis of the inner cylinder 16 connected to it coincide with the central axis 8 of the electron beam, but both outer apertures and the inner aperture connected to them. The central axes of the cylinders 15 and 17 are slightly displaced outward without being coincident with the central axes 7 and 9 of the corresponding electron beams . In FIG. 10 , S is the interval size between the central axes 7, 8, and 9 of the electron beams, L is the distance between the central axes 7, 9 of the outer electron beams and the inner wall of the neck, and D is G
The inner diameter of the inner cylinder connected to the opening of the three electrodes 5 is shown.

The in-line type electron gun configured as described above operates as follows.

Thermionic electrons emitted from the three cathodes 2R, 2G, 2B heated by a heater (not shown) are:
The electron beam is attracted to the G1 electrode 3 by the positive voltage applied to the G2 electrode 4, and three electron beams are formed. Then, these three electron beams pass through the opening of the G1 electrode 3 and
Next, after passing through the opening of the G2 electrode 4, the light is focused by the positive voltage applied to the G3 electrode 5 and the G4 electrode 6 constituting the main lens.

A low voltage of about 5 to 10 KV is applied to the G3 electrode 5, and a low voltage applied to the fluorescent screen is applied to the G4 electrode 6.
Since a high voltage of about 0 to 35 KV is applied through the conductive film applied to the inner wall of the funnel 20, the high voltage is applied between the G3 electrode 5 to which the low voltage is applied and the G4 electrode 6 to which the high voltage is applied. The potential difference causes an electrostatic field between the G3 electrode 5 and the G4 electrode 6, which forms the main lens.

Further, since the central axes of the outer cylindrical portions 12, 14 and 15, 17 corresponding to the G3 electrode 5 and the G4 electrode 6 do not coincide with each other, they act on the outer electron beams corresponding to the cathodes 2R, 2B. The main lens is not axisymmetric. Because of this non-axial symmetry, the outer electron beam is deflected inward on the phosphor screen 40 to coincide with the center beam. That is, since the three electron beams are concentrated on the fluorescent screen, the three color images of R, G, and B by the respective electron beams are correctly overlapped, and a color image can be reproduced.

Japanese Patent Application Laid-Open No. 1-137540 can disclose a conventional technique relating to this kind of cathode ray tube.

[0015]

In the color cathode ray tube having the in-line type electron gun constructed as described above, if the distance between the electron beam and the inner wall of the neck portion for accommodating the in-line type electron gun is short, it takes a long time. When operated, the high voltage applied to the funnel portion of the color cathode ray tube causes the inner wall of the neck to have a high potential, and the electron beam is deflected by the electric field generated by the high potential of the inner wall of the neck glass portion. There is a problem that the electron beams of the book are not concentrated.

In order to increase the distance between the electron beam and the inner wall of the neck for accommodating the in-line type electron gun, the diameter of the neck must be increased or the distance S between the center axes of adjacent electron beams of three electron beams must be increased. Can be reduced.

However, when the diameter of the neck portion is increased, the diameter of the funnel portion is also increased, so that the distance between the electron beam and the deflection yoke is increased, and the deflection sensitivity of the deflection yoke is reduced.

When the distance S between the center axes of the adjacent electron beams of the three electron beams is reduced, the electrodes of the main lens portion which separate the electron beams from each other in the main lens having the largest diameter of the electron beams. The distance between the portion and the electron beam becomes small, causing a problem that the electron beam collides with the main lens electrode at the time of a large current.

If the electron beam diameter in the main lens electrode is reduced to avoid this collision, the lens magnification decreases,
Since the space charge effect increases, a problem arises in that the electron beam spot diameter on the phosphor screen increases. further,
Connection Shrinking the distance S between the electron beam center axis, when constituting the main lens by electrode with three circular openings as shown in FIG. 10 is a main lens aperture D That opening
It is also necessary to reduce the inner diameter of the inner cylinder, which causes a problem that the spherical aberration of the main lens increases and the electron beam spot diameter on the phosphor screen is further deteriorated.

An object of the present invention is to solve the above-mentioned problems of the prior art, eliminate the influence of the potential on the inner wall of the neck portion, reduce static convergence change (STC drift) during long-time operation, and improve focus characteristics. To provide a color cathode ray tube having an in-line type electron gun.

[0021]

In order to achieve the above object, a color cathode ray tube equipped with an in-line type electron gun according to the present invention is arranged so that three color cathode ray tubes are arranged in a horizontal line toward the phosphor screen (in-line arrangement). Electron beam generating means (cathodes 2R, 2G, 2B, G1 electrode 3, G2
An electrode 4), for focusing said three electron beams on the phosphor screen, the main lens comprising two cylindrical electrodes provided apart from each other are kept at different potentials (G3 electrode 5, G4
Electrode 6), wherein the two cylindrical electrodes are arranged in the opposite portion
Has a single aperture common to the three electron beams,
A part which is set back inside the cylindrical electrode from the opposite part.
Internal electrodes (electrode 5-1 and electrode 6-1) are provided for
Each of the three electron beams passes through the internal electrode.
A color cathode ray tube provided with an in-line type electron gun in which a path is formed , wherein an outer diameter of a neck portion for accommodating the in-line type electron gun is T (mm), before the neck portion is adjacent to each other at a main lens position. when the central inter-axis distance of serial electron beam was S (mm), so as to satisfy the relationship of 2S + 14.6 ≦ T ≦ 28.1 between the T and S, and, between said central axis distance S
(Mm) was set to 4.1 mm or more.

Further, an in- line type electron gun of the present invention is provided.
Color cathode ray tube, with the in-line type electron gun
In a color cathode ray tube, you outer diameter of the neck portion for housing the in-line type electron gun T (mm), the main lens position
Between the centers axes distance before Symbol electron beam takes the adjacent S
When a (mm), so as to satisfy the relationship of 2S + 14.6 ≦ T ≦ 26.7 between the T and S, and, between said central axis distance S
(Mm) was set to 4.1 mm or more.

Further, an in- line type electron gun of the present invention is provided.
The color cathode ray tube provided with the in-line type electron gun
In the color cathode ray tube, the outer diameter of the neck portion for housing the in-line type electron gun T (mm), the main lens position
Definitive when the central inter-axis distance of the front Symbol electron beam adjacent the S (mm) from one another, so as to satisfy the relationship of 2S + 14.6 ≦ T ≦ 25.3 between the T and S, and wherein the center Center distance S
(Mm) was set to 4.1 mm or more.

[0024]

The operation of the color cathode ray tube according to the present invention will be described with reference to FIGS.

FIG. 4 shows an electron beam arranged outside (hereinafter referred to as “size” ) of three electron beams arranged inline .
FIG. 4 is a diagram illustrating the relationship between the distance L (mm) from the central axis of the “electron beam of the electron beam”) to the inner wall of the neck portion and the movement amount P (mm) of the electron beam on the phosphor screen after 24 hours operation. ,
The shortest distance L between the center axis of the electron beam and the inner wall of the neck is shown on the horizontal axis.
(Mm), the vertical axis indicates the movement amount P (mm) of the electron beam after the operation for 24 hours.

It has been found that the straight line A shown in FIG. 4 can be represented by P = -0.12L + 0.66 . This property was used by the inventor
Therefore, it was obtained.

Generally, electron beam transfer after 24 hours operation
It is practical if the momentum P is within the range of 0.1 mm or less.
Since it is known, the distance from the straight line shown from the front Kisotogawa electron beam center to the neck inner wall L (mm) of
By setting it to 4.8 mm or more, the movement amount P (mm) of the electron beam after operating for 24 hours can be kept within a practical range.

Next, assuming that the thickness of the glass constituting the neck is h (mm), the outer diameter T (mm) of the neck is
T = (S + L + h) × 2.

The thickness h (mm) of the neck glass must be not less than 2.5 mm in order to prevent the so-called neck glass from slipping out of the neck glass due to discharge through the neck glass. Outer diameter of glass T (mm)
And the distance S (mm) between the center axes of adjacent electron beams is set to 2S + 14.6 ≦ T, so that the movement amount P of the electron beam after 24 hours of operation is obtained.
(Mm) can be set in a practical range.

FIG. 5 is an explanatory diagram showing the relationship between the neck glass outer diameter T and the deflection sensitivity H of the deflection yoke. The horizontal axis represents the neck glass outer diameter T (mm), and the vertical axis represents the deflection yoke deflection. The sensitivity H (mHA ² ) is shown.

It was found that the straight line b shown in FIG. 5 can be expressed by H = 0.46T + 2.4 . This characteristic was used in experiments conducted by the present inventor.
Therefore, it was obtained.

Since the outer diameter T of the neck glass of a so-called mini-neck picture tube having excellent deflection sensitivity is 22.5 mm, the deflection sensitivity H is 12.8 mHA ² . If the sensitivity is reduced by about 10% to 20% as compared with the deflection sensitivity H, it is not necessary to largely change the deflection current generating circuit in the television set using the conventional mini-neck picture tube. That is, the deflection sensitivity of 14.1 mHA ² -1 in FIG.
An increase up to 5.4 mHA ² is in a practicable range.

Therefore, the outer diameter T of the neck glass is 25.3.
mm or less, 26.7 mm or less, or 28.1 mm or less, the deflection sensitivity H can be set to a practical range.

Further, considering the configuration of the deflection yoke, if the neck diameter is increased to such an extent, it is possible to reduce the deflection sensitivity to 10% or less, 15% or less, or 20% or less, respectively.

In the in-line type electron gun, in order to effectively use the main lens aperture, the diameter of the electron beam supplied to the main lens must be increased as the main lens aperture increases. This is to suppress the enlargement of the electron beam spot on the fluorescent surface due to the space charge effect. However, if the electron beam diameter in the main lens is too large,
This causes an increase in the electron beam spot diameter due to lens aberration.
That is, there is an optimum value for the diameter of the electron beam in the main lens.

FIG. 6 is an explanatory diagram showing the relationship between the main lens aperture and the optimum value Xr of the electron beam diameter supplied to the lens. The horizontal axis represents the main lens aperture D (mm), and the vertical axis represents the maximum electron beam diameter Xr. (Mm).

FIG . 6 shows a screen effective surface diagonal size 51 cm,
G4 electrode voltage 2 for color picture tube with deflection angle of 90 °
This is an analysis value when 5 kV, G3 electrode voltage is 7 kV, and beam current value is 4 mA.

It was found that the straight line c shown in FIG. 6 can be expressed by 55Xr-20D = 30 . This characteristic is the
It was obtained by computer simulation.

From this relationship, it can be seen that the larger the main lens aperture D (mm) , the larger the maximum electron beam diameter Xr (mm) .

FIG. 7 is a diagram for explaining the relationship between the distance S (mm) between the center axes of adjacent electron beams and the maximum value of the electron beam diameter in the main lens where the electron beams do not collide with the electrodes. Distance between center axes of electron beams adjacent to the axis S (mm)
The vertical axis indicates the maximum electron beam diameter Xr (mm).

The straight line d shown in FIG. 7 was found to satisfy Xr ≦ S−2.1 . This characteristic is consistent with the experiments of the inventor of the present application.
Obtained in combination with computer simulation
It is.

If the electron beam diameter is smaller than the value indicated by the straight line d in FIG. 7 (the area shown by oblique lines), the electron beam does not collide with the electrode.

By combining the relationships shown in FIGS. 6 and 7, the distance S (m) between the center axes of adjacent electron beams is obtained.
The relationship between m) and the optimal value of the main lens aperture D (mm) is obtained. The main lens diameter D is such that the center axis of the electron beam on the side is perpendicular to the in-line direction (horizontal direction) of the openings 5R, 5G, and 5B of the plate electrode 5-1 installed inside the G3 electrode 5. Or the diameter connecting the inner edge of the G3 electrode 5 or G3 from the side electron beam center axis in the inline direction from the side electron beam center axis.
It is the smaller of two times the distance connecting the inner edges of the electrode 5 openings. FIG. 2 shows a case where the main lens aperture D is represented in a direction orthogonal to the in-line direction (horizontal direction).
It is shown. In the case of an electrode having three circular openings as shown in FIG. 10, the diameter corresponds to the diameter D of the circular openings.

[0044] Figure 8 is an explanatory view of the relationship between the central axis distance S (mm) and the main lens diameter D of the adjacent electron beam (mm), adjacent to the horizontal axis the electron beam between the center axis distance S a (mm),
The vertical axis indicates the main lens diameter D (mm).

The straight line e shown in FIG . 8 can be expressed as 55S-20D ≧ 145.5 .

In the range shown by the oblique line below the straight line E, the electron beam does not collide with the electrode at the time of a large current. However
If the diameter of the main lens is smaller than 4.0 mm, the diameter of the electron beam spot on the phosphor screen becomes too large to cause a problem. Therefore, the diameter of the main lens must be 4.0 mm or more. Therefore, the S dimension cannot be smaller than 4.1 mm,
It is necessary to be 4.1 mm or more.

By satisfying all the above conditions, the operation is performed for 24 hours within a range where the deflection sensitivity H is practical, and a range where the electron beam does not collide with the electrode and the size of the electron beam spot diameter does not matter. The subsequent movement amount P (m of the electron beam)
m) can be in a practically usable range.

[0048]

(Embodiment 1) Hereinafter, a color cathode ray tube having an in-line type electron gun according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view taken along line A-A of FIG. 10 for explaining a reference example and an embodiment of a color cathode ray tube having an in-line type electron gun according to the present invention. a corresponds to the line a-a of FIG. 9.

In FIG . 1 , reference numeral 1 denotes an in-line type electron gun housed in a neck portion 30, 2R, 2G, and 2B cathodes, 3 a G1 electrode, 4 a G2 electrode, 5 a G3 electrode constituting a main lens, and 6 Is a G4 electrode, which is the other electrode constituting the main lens, 7, 8, and 9 are the central axes of the electron beams,
-1 is a plate electrode provided in the G3 electrode 5, 5R, 5
G and 5B are electron beam passage holes formed in the plate electrode 5-1; 6-1 is a plate electrode provided in the G4 electrode 6;
R, 6G, and 6B are electron beam passage holes formed by the plate electrode 6-1.

FIG. 2 is a sectional view taken along line BB of FIG.
FIG. 3 is a cross-sectional view in a direction perpendicular to the tube axis viewed in the direction b.
It is sectional drawing in the direction perpendicular | vertical to the pipe axis seen from arrow B in the direction of arrow cc.

1 to 3, a G3 electrode 5 is a cylindrical electrode whose opening section is substantially elliptical.
Also apertures sectional also is cylindrical electrode having a substantially elliptical shape.

As shown in FIG. 2, the plate electrode 5-1 installed in the G3 electrode 5 passes the electron beam in the horizontal direction (in-line arrangement plane) XX to allow three electron beams to pass therethrough. Holes 5R, 5G, 5B are formed.

The flat electrode 6-1 installed in the G4 electrode 6
Has a central beam passage hole 6G in the center thereof, and the outer electron beam passage holes 6R and 6B are formed by the inner wall of the G4 electrode 6 and a part of the notch on both sides in the XX direction of the plate electrode 6-1. Is done. The facing openings of the G3 electrode 5 and the G4 electrode 6 have the same shape.

Then, the glass outer diameter T (m
m) is 24.3 mm, and the distance S (mm) between the central axes 7, 8, 9 of adjacent electron beams incident on the main lens is 4.
G3 electrode 5 and G4 as the main lens aperture
The diameter D (mm) in the vertical direction of the opening of the electrode 6 with respect to the three electron beam arrays is 5.5 mm. With this dimension, 2S + 14.6 = 2 × 4.75 + 14.6 = 24.1 , and the neck glass outer diameter T (mm) satisfies the relationship of 2S + 14.6 ≦ T ≦ 25.3.

The S dimension is also 4.75 mm and 4.1.
mm or more.

As described above, the glass outer diameter T is set to 24.3 mm.
(T <25.3), the deflection sensitivity H (mH
A ² ) is within a practical range, and the electron beam travel amount P (m) after 24 hours operation is within a range in which the electron beam does not collide with the electrode and the size of the electron beam spot diameter does not matter.
m) can be set within a practical range.

Example 2 The same as Example 1 except for the following.

Neck glass outer diameter T = 26.5 mm Distance between adjacent electron beam center axes S = 5.5 mm Main lens aperture D = 6.2 mm In this case, 2S + 14.6 = 25.6 , and Neck glass outside The diameter T (mm) satisfies the relationship of 2S + 14.6 ≦ T ≦ 26.7, and S = 5.5> 4.1.

From FIG. 5, the deflection sensitivity is H = 14.7 mH.
In A ^2, Minine the neck glass outer diameter T = 22.5 mm
The sensitivity can be reduced to 15% or less as compared with the case of a black picture tube , and the same operation as that of the reference example can be obtained.

(Specific Example 3) Except for the following, the procedure is the same as in Specific Example 1.

Neck glass outer diameter T = 28.0 mm Distance between center axes of adjacent electron beams S = 6.6 mm Main lens aperture D = 5.5 mm In this case, 2S + 14.6 = 27.8 . The diameter T (mm) satisfies the relationship of 2S + 14.6 ≦ T ≦ 28.1, and S = 6.6> 4.1.

As shown in FIG. 5, the deflection sensitivity is H = 15.3 mH.
In A ^2, Minine the neck glass outer diameter T = 22.5 mm
The sensitivity can be reduced to 20% or less as compared with the case of a black picture tube , and the same operation as in the first embodiment can be obtained.

[0064]

As described above, according to the present invention,
The outer diameter T (mm) of the neck portion of the cathode ray tube and the distance S (mm) between the central axes of adjacent electron beams are 2S + 14.6.
≦ T ≦ 28.1 to have a relationship, and by the central axis distance S between adjacent plural electron beams (mm) and more 4.1 mm, maintained at a practicable range deflection sensitivity, also electronic An excellent function that the beam does not collide with the main lens electrode and the movement amount of the electron beam after long-time operation can be kept within a practical range as long as the size of the electron beam spot diameter does not matter. A color cathode ray tube having an in-line type electron gun can be provided.

[Brief description of the drawings]

FIG. 1 shows a color equipped with an in-line type electron gun according to the present invention.
A tube axis direction cross-sectional view of the essential part for explaining a reference example and an embodiment of the over the cathode ray tube.

FIG. 2 is a cross-sectional view taken along line BB of FIG. 1 in a direction perpendicular to a tube axis as viewed in a direction indicated by arrows bb.

FIG. 3 is a cross-sectional view taken along line BB of FIG. 1 and viewed in a direction indicated by an arrow c-c and perpendicular to a tube axis.

FIG. 4 shows a distance L (mm) from a central axis of an electron beam disposed outside of three electron beams to an inner wall of a neck portion.
When an illustration of the relationship between the movement amount on the phosphor screen of the electron beam after 24 hours operation P (mm).

[5] Ru illustration der relationships neck glass outer diameter T and (mm) and the deflection sensitivity H of the deflection yoke (mHA ^2).

[6] Ah In illustration of the relationship between the main lens aperture D (mm) and supplied to the lens the electron beam diameter of the optimum value Xr (mm)
You .

FIG. 7 shows a distance S (mm) between center axes of adjacent electron beams.
FIG. 4 is a diagram illustrating the relationship between the maximum electron beam diameter Xr (mm) in the main lens without the electron beam colliding with the electrode.
There is .

FIG. 8 shows a distance S (mm) between centers of adjacent electron beams;
It is explanatory drawing of the relationship of main lens aperture D (mm).

FIG. 9 is a schematic cross-sectional view of a conventional color cathode ray tube having an in-line type electron gun, taken along a tube axis direction, showing a schematic structure thereof.

10 is a cross-sectional view of a main part of an in-line type electron gun used for a conventional cathode ray tube, showing a neck portion in the direction of arrow a from line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 In-line type electron gun 2R, 2G, 2B Cathode 3 G1 electrode 4 G2 electrode 5 G3 electrode 5-1 Plate electrode 5R, 5G, 5B installed in G3 electrode Electron beam passage hole of plate electrode 5-1 6 G4 electrode 6-1 Plate electrode provided in G4 electrode 6G Central electron beam passage hole 6G of plate electrode 6-1 Electron beam passage holes on both sides of plate electrode 6-1 7, 8, 9 Electron beam central axis 30 neck Department.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-5-325826 (JP, A) JP-A-60-47348 (JP, A) JP-A-56-13644 (JP, A) JP-A-4- 43532 (JP, A) JP-A-59-128742 (JP, A) JP-A-4-32138 (JP, A) JP-A-58-126644 (JP, A) JP-A-4-43532 (JP, A) "Super Neck Neck Color Picture Tube", Toshiba Review, 1979, Vol. 34, No. 10, p. 875-878 (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 29/50

Claims (7)

(57) [Claims] 1. A and the electron beam generating means for generating three electron beams arranged in a row toward the phosphor screen, the 3
This electron beam for focusing on the phosphor screen, the two cylindrical electrodes provided apart from each other are kept at different potentials
And a main lens including: the two cylindrical electrodes,
The opposing portion has a single aperture common to the three electron beams.
And recedes inside the cylindrical electrode from the opposing portion.
The internal electrode is provided in the portion where
In a color cathode ray tube provided with an in-line type electron gun in which passages of the three electron beams are formed, an outer diameter of a neck portion accommodating the in-line type electron gun is T.
(Mm), when the electric <br/> element beam center between axis distance of adjacent in the main lens position was S (mm), T and S
2S + 14.6 ≦ T ≦ 28.1 4.1 ≦ S , and the lens aperture of the main lens is D (m
A color cathode ray tube equipped with an in-line type electron gun, characterized by satisfying a relationship of 145.5 ≦ 55S-20D when m) . 2. A color cathode ray tube having an in- line type electron gun according to claim 1 , wherein an outer diameter of a neck portion for accommodating said in-line type electron gun is T (mm), and a main lens position.
When the electron beam center between axis distance of adjacent the location and S (mm), between the T and S, satisfy the relationship of 2S + 14.6 ≦ T ≦ 26.7 4.1 ≦ S, and , And the lens aperture of the main lens is D (m
A color cathode ray tube equipped with an in-line type electron gun, characterized by satisfying a relationship of 145.5 ≦ 55S-20D when m) . 3. A color cathode ray tube having an in-line type electron gun according to claim 1, wherein the in-line type electron
The outer diameter of the neck that houses the gun is T (mm), the main lens position
Between the center axes of the electron beams adjacent to each other at the position
Is S (mm), the relationship of 2S + 14.6 ≦ T ≦ 25.34.1 ≦ S is satisfied between T and S , and the lens aperture of the main lens is D (m
A color cathode ray tube equipped with an in-line type electron gun, characterized by satisfying a relationship of 145.5 ≦ 55S-20D when m) . 4. A color cathode ray tube comprising the in-line type electron gun according to claim 1 , wherein
A color cathode ray tube provided with an in-line type electron gun, wherein the internal electrode is a plate-like electrode . 5. A color cathode ray tube provided with the in-line type electron gun according to claim 4, wherein a thickness of the plate-shaped electrode is
A color cathode ray tube equipped with an in-line type electron gun, characterized in that the direction is the tube axis direction of the color cathode ray tube. 6. A color cathode ray tube provided with the in-line type electron gun according to claim 5, wherein the number of said plate electrodes is small.
A color cathode ray tube equipped with an in-line type electron gun, wherein a hole surrounding the central electron beam is provided . 7. An in-line type electron gun according to claim 6,
In the provided color cathode ray tube, the plate-shaped electrode is provided.
The hole surrounding the centered electron beam has a diameter in the horizontal row direction.
It is formed smaller than the diameter in the direction perpendicular to the horizontal row direction.
With an in-line type electron gun
-Cathode ray tube.