JP2002141001A - Electron gun and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a deterioration of a beam spot diameter of a multiple- beam electron gun. SOLUTION: For the electron gun emitting multiple-beams, multiple beam passing holes 41 (41R1 and 41R2, 41G1 and 41G2, 41B1 and 41B2) are arranged in one direction at each cathode for each color on the first electrode G1, and the beam passing holes 41 are formed into elongated shapes (for example, vertically elongated shape, laterally elongated shape) in the direction rectangular to the direction in which the beam passing holes are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-beam type electron gun and a display device equipped with the electron gun, such as a television receiver, a monitor, a display, and a projection type display device incorporating a color cathode ray tube. It relates to a display device.

[0002]

2. Description of the Related Art A conventional electron gun for a color cathode ray tube used for, for example, a computer display or the like takes out three electron beams from three cathodes, and the respective electron beams alternate with red, green and blue on a screen (fluorescent screen). Irradiation is performed on phosphor layers of different colors. FIG. 12 and FIG.
An example of such a conventional electron gun for a color cathode ray tube will be described. The electron gun 1, the red was inline, three cathodes K corresponding to the green and blue [K _R, K _G and K _B]
If each cathodes K _R, so that common to K _G and K _B, the plurality of electrodes, i.e. first electrode G ₁ in the present embodiment, the second
Electrode G ₂ , third electrode G ₃ , fourth electrode G ₄ , fifth A electrode G
_5A , a fifth B electrode G _5B , an intermediate electrode G _M , and a sixth electrode G ₆ . This and the integral shield cup G ₇ is downstream of the sixth electrode G ₆ is provided.

[0003] The 5B electrode G _5B and the intermediate electrode G _M and the main electron lens in the sixth electrode G ₆ is formed. The horizontal position of the electron beam at the screen corner between the fifth A electrode G _5A and the fifth B electrode G _5B ,
A quadrupole lens for simultaneously focusing in the vertical direction is formed. The 5A to the electrode G _5A supplied focus voltage Fc of fixed, dynamic focus voltage Fv is supplied to the 5B electrode G _5B. The sixth electrode G ₆ is an anode voltage is supplied, the intermediate electrode G _M second 5A electrode G _5A
Intermediate voltage between the sixth electrode G ₆ is supplied when. The second electrode G ₂ and the fourth electrode G ₄ are connected commonly to each other.

[0004] Each first electrode G ₁ ~ sixth electrode G _6, FIG. 1
As shown in FIG. 3, three electron beams B _R , B _G , B
A beam transmission hole for passing _B is provided. The beam transmission holes 2 and 3 of the first electrode G ₁ and the second electrode G ₂ are formed in a circular shape.

[0005] In the electron gun 1, the red is inline, green and three cathodes K _R corresponding to blue, K _G and K of three emitted from _B electron beams B _R, is B _G and B _B The light is converged by the main lens, concentrated (convergence) on a screen (fluorescent screen) (not shown), and emitted to the red, green, and blue phosphor layers.

[0006]

By the way, in the electron gun 1 shown in FIG. 12, the cathode current amount (that is, the electron amount that can be extracted from the cathode K) is increased in order to increase the brightness of the screen (phosphor screen). In addition, the beam diameter increases due to repulsion between electrons in the electron beam and the like. As a result, the beam spot diameter on the phosphor screen increases, and the resolution of the color cathode ray tube deteriorates. Therefore, there is a limit to the increase in the amount of cathode current required to increase the luminance of the phosphor screen.

Therefore, for example, the cathode K _{R of} each color,
K _G, with respect to K _B, the first electrode G _1, the second electrode G ₂ 2
Two electron transmission holes are formed, and two electron beams of the same color emitted from each cathode through the first electrode G ₁ and the second electrode G ₂ are concentrated so as to form one beam spot on the phosphor screen. A multiple-beam type electron gun has been developed in which convergence is achieved to achieve higher luminance. In such an electron gun, the amount of current per beam transmission hole can be reduced, and the beam spot diameter of each electron beam on the phosphor screen can be reduced. Further, since the amount of current per one beam transmission hole is small, the drive voltage is reduced, and a high current can flow at the same cathode drive voltage.

However, in such a multiple-beam type electron gun, the beam spot diameter on the phosphor screen is likely to be deteriorated, for example, the beam spot diameter is likely to be deteriorated due to the uneven concentration of each of the two electron beams. .

In view of the above, the present invention provides a multiple beam type electron gun which suppresses deterioration of the beam spot diameter and has good focus characteristics, and a display device provided with this electron gun.

[0010]

An electron gun according to the present invention comprises:
A so-called multi-beam type electron gun, in which a first electrode is provided with a plurality of beam transmitting holes arranged in one direction with respect to a cathode of the same color, and this beam transmitting hole is formed by the plurality of beam transmitting holes. It is formed in a long hole shape that is long in a direction perpendicular to the arrangement direction. When a plurality of beam transmitting holes are arranged in the horizontal direction of the screen, the shape of the beam transmitting holes is set to be a vertically long shape that is long in the vertical direction. When a plurality of beam transmitting holes are arranged in the vertical direction of the screen, the shape of the beam transmitting holes is set to be horizontally long and long in the horizontal direction.

In the electron gun of the present invention, the electron beam has a cross-sectional shape elongated in a direction orthogonal to the arrangement direction of the beam transmission holes by the beam transmission holes of the first electrode. Even if there is a variation in concentration, that is, even if a deviation occurs in the arrangement direction of the beam transmission holes, the beam spot diameter on the screen is improved.

A display device according to the present invention is provided with the above-mentioned electron gun.

In the display device of the present invention, the provision of the multiple-beam type electron gun having the above configuration improves the beam spot diameter focused on the screen, enables higher resolution, and improves the image quality with high definition. can get.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

An electron gun according to the present invention is an electron gun for concentrating a plurality of electron beams of the same color emitted from a cathode on a screen. Are formed, and the beam transmission holes are vertically elongated in the vertical direction. An electron gun according to the present invention is an electron gun for concentrating a plurality of electron beams of the same color emitted from a cathode on a screen, and is arranged on a first electrode in a direction perpendicular to the screen with respect to the cathode of the same color. A plurality of beam transmitting holes are formed, and the beam transmitting holes are formed in a horizontally long shape that is long in the horizontal direction.

A display device according to the present invention includes a cathode ray tube provided with any one of the above-mentioned multiple beam type electron guns.

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

First, in order to facilitate understanding of this embodiment, an electron gun according to a comparative example shown in FIG. 10 will be described.
The electron gun 21 according to the present comparative example has three cathodes K [K _R ,
K _G , K _B ] and a plurality of electrodes, in this example, a first electrode G ₁ , a second electrode G ₂ , and a third electrode G, so as to be common to each card K _R , K _G, and K _{B. 3} , a fourth electrode G ₄ , a fifth A electrode G _5A , a fifth B electrode G _5B , an intermediate electrode G _M , and a sixth electrode G ₆ . This and the integral shield cup G ₇ is downstream of the sixth electrode G ₆ is provided.

As described above (see FIG. 13), the fifth BG _5B
The intermediate electrode G _M and the main electron lens in the sixth electrode G ₆ is formed. A quadrupole lens is formed between the fifth A electrode G _5A and the fifth B electrode G _5B for simultaneously focusing the electron beam in the horizontal and vertical directions at the screen corner. A fixed focus voltage Fc is supplied to the fifth A electrode G _5A ,
Dynamic focus voltage Fv is supplied to the B electrode G _5B. The sixth electrode G ₆ is an anode voltage is supplied, the intermediate electrode G _M intermediate voltage between the first 5A electrode G _5A and the sixth electrode G ₆ is supplied. The second electrode G ₂ and the fourth electrode G ₄ are connected commonly to each other.

[0020] Then, the first electrode G ₁ and the second electrode G _2, each of the cathodes K _R, K _G, 2 two beams transmitting hole 22 [22 _R1 against K _B, 22 _R2, 22 _G1, 22 _G2 , 2
_2B1 , _22B2 ] and 23 [ _23R1 , _23R2 , _23G1 , 2
3 _G2 , 23 _B1 , 23 _B2 ] are formed. The beam transmitting holes 22 of the same color and the beam transmitting holes 23 are formed so as to be arranged in the horizontal direction of the screen. Other third electrode G ₃
~ The sixth electrode G _6, as shown, three beams transmitting hole for transmitting respectively the same color of the electron beams are formed.

This electron gun 21 is shown in FIGS. 11A and 11B.
U, each cathode K_R, K_G, K_BFrom the first electrode G₁,
Second electrode G_TwoE-beams of each color emitted through
[B_R1And B_R2, B_G1And B_G2, B_B1And B_B2Does not intersect
Concentrate on each other on the screen through a trajectory and at the same time, three colors
Electron beam B_R(B_R1, B_R2), B_G(B_G1, B_G2)
And B_B(B_B1, B_B2) Focus on each of the phosphor screens
Red, green, and blue phosphor layers.
You. However, in practice, they constitute electron guns, cathode ray tubes, etc.
Two parts of the same color, red, green and blue, due to the accuracy of each part
Electron beam [B_R1And B_R2, B_G1And B_G2, B _B1Passing
And B_B2Is difficult to concentrate completely on the screen.
As shown in FIG. 11C, in this example, two electronic beams of each color are used.
Is slightly shifted in the horizontal direction of the screen. As a result,
Total beam spot diameter when viewed in the center of the screen
Is not a true circle, but has a vertical diameter φ_VHorizontal to
Direction diameter φ_HIs apparently larger and the vertical diameter φ_VWhen
Horizontal diameter φ_HDifferences occur.

As the definition of a cathode ray tube increases, it is desired to suppress the deterioration of the beam spot diameter due to such causes and to further improve the beam spot diameter. The present invention is intended to further improve the beam spot diameter in a multiple-beam type electron gun.

FIG. 1 shows an example of a color cathode ray tube according to an embodiment of the present invention. In the color cathode ray tube 31 according to the present embodiment, a color phosphor screen 34 composed of red, green and blue phosphor layers is formed on the inner surface of a panel 32P of a cathode ray tube (glass tube) 32. A color selection mechanism 35 is disposed opposite to the N-side, and a multiple-beam type electron gun 36 according to the present invention is disposed in the neck portion 32N. On the outside of the tube 32, the electron beam B _R from the electron gun 36, the horizontal B _G and B _B, the deflection yoke 37 for deflecting in the vertical direction is arranged.

In the color cathode ray tube 31, the electron gun 36
Cathodes K [K corresponding to red, green and blue_R, K_G, K
_BElectron beam B corresponding to each color emitted from
[B_R, B _G, B_BIs a main electron formed by a plurality of electrodes
Converged by the lens, focused on the phosphor screen 34, and
Converged into red, green and blue phosphor layers
Irradiated. This electron beam B_R, B_G, B_BBut deflection
The beam 37 is deflected in the horizontal and vertical directions by the
Error image is displayed.

FIGS. 2 and 3 show such a color cathode ray tube 3.
One embodiment of the multiple beam electron gun 36 in FIG.
Is shown. Multi-beam type electron gun 3 according to the present embodiment
61 corresponds to red, green and blue arranged in line
Three cathodes K [K_R, K_G, K_B] And each cathode K
_R, K_GAnd K_BSo that multiple
Pole, in this example, the first electrode G ₁, The second electrode G_Two, The third electrode G
_Three, The fourth electrode G_Four5th A electrode G_5AThe fifth B electrode G_5B,
Intermediate electrode G_M, Sixth electrode G₆Consists of Sixth electrode G₆of
In the latter stage, a shield cup G integrated with the₇Is provided
You.

As described above, the fifth BG _5B and the intermediate electrode G _M
When the main electron lens is formed by the sixth electrode G _6. A quadrupole lens is formed between the fifth A electrode G _5A and the fifth B electrode G _5B for simultaneously focusing the electron beam in the horizontal and vertical directions at the screen corner. The 5A to the electrode G _5A supplied focus voltage Fc of fixed, dynamic focus voltage Fv is supplied to the 5B electrode G _5B. The sixth electrode G ₆ is an anode voltage is supplied, the intermediate electrode G _M intermediate voltage between the first 5A electrode G _5A and the sixth electrode G ₆ is supplied. The second electrode G ₂ and the fourth electrode G ₄ are connected commonly to each other.

Each cathode K is connected to the first electrode G _1.
R, K _G, more with respect to K _B, 2 two beam transmission hole 41 in the present embodiment [41 _R1 and 41 _R2, 41 _G1 and 41 _G2, 41
_B1 and 41 _B2 ] are formed, and the beam transmitting holes 41 _R1 and 41 _R2 and the beam transmitting holes 41 _G1 and 41 _{G of the} same color are provided.
1 _G2 and the beam transmission holes 41 _B1 and 41 _B2 are formed so as to be arranged in the horizontal direction of the screen. In the present embodiment, in particular, each beam transmission hole 41 [[41 _R1 and 41 _R2 , 41 _G1 and 41 _G2 , 41 _B1 and 41 _B2 ]] is orthogonal to the arrangement direction of the two beam transmission holes of the same color. It is formed in a vertically long shape that is long in the vertical direction.

[0028] Also, the second electrode G _2, each of the cathodes K _R, K plurality respect _G and K _B, 2 two beams transmitting hole 42 in the present embodiment [42 _R1 and 42 _R2, 42 _G1 and 42 _G2,
42 _B1 and 42 _B2 ] are formed, and the beam transmitting holes 42 _R1 and 42 _R2 and the beam transmitting holes 42 _G1 and 42 of the same color are provided.
_G2 and beam transmission holes _42B1 and _42B2 are formed so as to be arranged in the horizontal direction of the screen. Hole shape of the second individual beam transmission hole 42 of the electrode G ₂ is the same longitudinal shape as the first electrode G ₁ or size circular that can penetrate or exit cross-section elongated electron beam through the first electrode G _1, Can be formed. In this example, a circular beam transmitting hole 42 [42
_R1 and 42 _R2 , 42 _G1 and 42 _G2 , 42 _B1 and 42 _B2 ]
Formed.

As shown in the figure, the other third electrode G ₃ to sixth electrode G ₆ are formed with three beam transmitting holes for transmitting the same color electron beam.

In this electron gun 361, as shown in FIG. 4, two electron beams B _R1 of respective colors emitted from the cathodes K _R , K _G , and K _B through the first electrode G ₁ and the second electrode G _2. And B _R2 , B _G1 and B _G2 , and B _B1 and B _B2 pass through orbits where they do not intersect and concentrate on the screen, and at the same time, the three color electron beams B _R (B _R1 , B _R2 ), B
_G (B _G1 , B _G2 ) and B _B (B _B1 , B _B2 ) are concentrated to irradiate the corresponding red, green, and blue phosphor layers of the screen (phosphor screen) 34, respectively.

According to the present embodiment, the beam transmission holes 42 of the first electrode G ₁ constituting the electron gun 361 is formed in a vertically long shape, each of the cathodes K _R, emitted from K _G and K _B The electron beam passes through the vertically elongated beam transmitting holes 42 [42 _R1 , 42 _R2 , 42 _G1 , 42 _G2 , 4] of the first electrode G _1.
2 _B1 , 42 _B2 ], and becomes an electron beam B _R1 and B _R2 , an electron beam B _G1 and B _G2 , and an electron beam B _B1 and B _B2 each having a vertically long section (see FIGS. 5A and B). Irradiation is performed so as to concentrate on the phosphor screen. Because of this, electron guns,
Accuracy of the relationship between each part constituting the cathode-ray tube or the like, the two electron beams B _R1 and B _R2 each same color, two electron beams B
_{Even if G1} and _BG2 and the two electron beams _BB1 and _BB2 are slightly shifted in the horizontal direction of the screen, the total beam spot diameter when viewed at the center of the screen is improved as compared with a circular beam, for example. That is, the two cross-section elongated electron beam B _G1 and B _G2 (other electron beam B _R, B _B is the same) and the state shifted in the horizontal direction, the comparative example when (comparable with a circular beam of the aforementioned 5C), the horizontal diameter φ _H and the vertical diameter φ _H of the total beam spot of the present embodiment are compared as shown in FIG. 5C.
The difference from _V is smaller than that of the comparative example (the ratio φ _V / φ _H approaches 1), and is further improved.

On the other hand, in a color cathode ray tube, usually,
As shown in FIG. 6 (schematic diagram), the center of the screen 40 is a perfect circle.
Beam spot of 45 s, but at the screen corner
The result is a long beam spot 45c. By the way, for example, φ_V:
φ_H= 1: 2. On the other hand, the power
FIG. 7 (schematic diagram) shows a color cathode ray tube having a sub gun 361.
As shown in FIG.
the beam spot 46c at the screen corner
Diameter in the vertical direction φ_VAnd horizontal diameter φ_HThe difference between
You. That is, φ_V/ Φ_HWill be closer to 1
You. By the way, for example, φ at the center of the screen_V: Φ_HIs 1: 1 /
If it is 1.5, at the screen corner, φ _V: Φ_H= 1: 2
/1.5.

Therefore, in this embodiment, while the two electron beams are concentrated in the horizontal direction, the deterioration of the beam spot diameter in the horizontal direction can be suppressed, and good focus characteristics can be obtained. Therefore, high resolution and high definition image quality of the color cathode ray tube can be realized.

FIGS. 8A and 8B show the color cathode ray tube 31.
Another embodiment of the multiple beam type electron gun 36 in
Show. Multi-beam type electron gun 36 according to the present embodiment
2 is the first electrode G₁And each cathode K_R, K_G, K_BTo
On the other hand, a plurality of, in this example, two beam transmitting holes 51 [51 _R1
And 51_R2, 51_G1And 51_G2, 51_B1And 51_B2〕But
Beam transmission holes 51 formed and of the same color_R1And 5
1_R2, Beam transmission hole 51_G1And 51_G2, Beam transmission hole 5
1_B1And 51_B2Are arranged vertically in the screen.
Formed. In the present embodiment, in particular,
Beam transmission hole 51 [[51_R1And 51_R2, 51_G1And 5
1_G2, 51_B1And 51_B2] Are two beams of the same color
Formed in a horizontally long shape that is long in the horizontal direction perpendicular to the direction
Is done.

The second electrode G_TwoAlso each cathode
K_R, K_GAnd K_BTo the first electrode G ₁Beam transmission
In this example, two beam transmitting holes 52 [52_R1Passing
And 52_R2, 52_G1And 52_G2, 52_B1And 52_B2] Is the shape
Beam transmission holes 52 of the same color_R1And 5
2_R2, Beam transmission hole 52_G1And 52_G2, Beam transmission hole 5
2_B1And 52_B2Are arranged vertically in the screen.
Formed. Second electrode G_TwoOf each beam transmission hole 42
The hole shape is the first electrode G₁The same horizontal shape as
Pole G₁Elongated cross section electron beam emitted through
It can be formed in a circular shape of a large size. In this example
Is a circular beam transmission hole 52 [52_R1And 52_R2, 52
_G1And 52_G2, 52_B1And 52_B2] Is formed. That
Other configurations are the same as those in FIG.
A duplicate description will be omitted.

[0036] In this embodiment of FIG. 8, each of the cathodes K _R, when each two beam transmission holes of the first electrode and longitudinally arranged with respect to K _G and K _B, the beam transmission holes 51 [[51
_R1 and _51R2 , _51G1 and _51G2 , _51B1 and _51B2 ]
Because There is formed in a horizontally long shape, each of the cathodes K _R, electron beams emitted from K _G and K _B, respectively first electrode G ₁
Horizontally extending beam transmitting hole 51 [[51 _R1 , 51 _R2 , 5
1 _G1 , 51 _G2 , 51 _B1 , 51 _B2 ], each of which becomes an electron beam having a laterally long cross-section and is concentrated on the phosphor screen. In this case, even if the two electron beams of the same color are slightly shifted in the vertical direction of the screen due to the accuracy of the components constituting the electron gun, the cathode ray tube, etc., for example, the total when viewed in the center of the screen Is improved over the circular beam transmitted through the vertically arranged circular beam transmitting holes for the same reason as described in the above-described horizontal array. That is, in the state where the two cross-sectionally elongated electron beams are shifted in the vertical direction, compared with the case where the circular beam is shifted in the same manner,
The difference between the horizontal diameter phi _H and vertical diameter phi _V total spot decreases (the ratio φ _H / φ _V approaches 1), is further improved.

Therefore, in the present embodiment, while the two electron beams are concentrated in the vertical direction, the deterioration of the beam spot diameter in the vertical direction can be suppressed, and good focus characteristics can be obtained. High resolution and high-definition image quality of color cathode ray tubes can be achieved.

[0038] In the above example, the astigmatic effect means for the electron beam vertically, horizontally long, was constructed in the beam transmission holes of the long hole shape formed on the first electrode G _1, others such quadrupole lenses Can also be configured. In this case, for example, as the dynamic focus voltage Fv to which the DC component DC shown in FIG. 9 is superimposed as the dynamic focus voltage Fv applied to the fifth B electrode G _5B in FIG. The electron beam can be shaped vertically or horizontally by the polar lens function. At this time, it is possible to form the first electrode G ₁ of the beam transmission hole circular.

In the above example, two beam transmitting holes of the same color are provided in the first electrode G ₁ , but the present invention can be applied to a configuration in which three or more beam transmitting holes are provided. Further, in the above example, one cathode is provided for each of a plurality of (two in this example) beam transmitting holes of the same color, but a plurality of (for example, two) cathodes are provided.
Cathode for each beam transmission hole (total of 6 cathodes)
May be arranged. The present invention can be applied to various electrode configurations other than those shown in FIG. 3 as the electrode configuration of the multiple beam type electron gun.

In the above example, the invention is applied to an electron gun for a color cathode ray tube. However, the invention is also applicable to a multiple beam type electron gun for a monochromatic cathode ray tube used for a projection display device (so-called projector).

Further, the present invention provides the above-mentioned electron gun of the present invention,
For example, a color cathode ray tube 31 having electron beams 361 and 362 of a plural beam type is incorporated in a set, and for example, a projection type having a display device such as a television receiver, a monitor, and a display, or a monochromatic cathode ray tube having an electron gun for single color. It can be configured as a display device (color projector). According to such a display device, it is possible to suppress deterioration of the beam spot diameter on the screen and obtain good focus characteristics,
A display device with higher resolution and higher image quality can be provided.

[0042]

According to the electron gun of the present invention, a plurality of beams
The first electrode G ₁Each of the same color
When a number of beam transmission holes are arranged in the horizontal direction,
By forming the beam transmission hole in a vertically long shape
Water of the plurality of electron beams transmitted through the beam transmission holes.
While focusing in the horizontal direction, the beam spot diameter in the horizontal
Good focus characteristics without deterioration can be obtained.
Also, the first electrode G₁Multiple beam transmission holes of the same color
When arranged vertically, align each beam transmission hole horizontally.
The beam transmission hole
The electron beams passing through the
A good beam without deterioration of the beam spot diameter in the vertical direction.
Focusing characteristics can be obtained.

According to the display device of the present invention, it is possible to provide a display device having a higher definition and higher image quality by obtaining the good focus characteristic of the electron beam by providing the above-mentioned multiple beam type electron gun. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a color cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a multiple beam type electron gun according to the first embodiment of the present invention.

FIGS. 3A and 3B are exploded perspective views of a multiple-beam type electron gun according to the first embodiment of the present invention.

FIG. 4 is a sectional view of a beam trajectory in the multiple-beam type electron gun according to the first embodiment of the present invention.

FIGS. 5A to 5C are explanatory diagrams of the operation of the multiple-beam type electron gun according to the first embodiment of the present invention.

FIG. 6 is an explanatory view showing a beam spot shape at the center of a screen and a corner of a screen by a general electron gun.

FIG. 7 is an explanatory diagram showing beam spot shapes at a screen center and a screen corner by a multiple beam type electron gun according to the first embodiment of the present invention.

8A and 8B are exploded perspective views of a multiple-beam type electron gun according to a second embodiment of the present invention.

FIG. 9 is a waveform diagram showing an example of a dynamic focus voltage applied to an electrode constituting a quadrupole lens as an astigmatic means for an electron beam according to the present invention.

FIGS. 10A and 10B are exploded perspective views of a multiple-beam type electron gun according to a comparative example.

FIGS. 11A to 11C are explanatory diagrams illustrating the operation of a multiple-beam type electron gun according to a comparative example.

FIG. 12 is a configuration diagram of an electron gun according to a conventional example.

FIG. 13 is an exploded perspective view of an electron gun according to a conventional example.

[Explanation of symbols]

1 ... electron gun 31 ... color cathode ray tube 32 ...
..Tube, 34 phosphor screen, 35 color selection mechanism
Electron gun 21,36,361,362 ... multiple beam system, K [K _R, K _G, K _B] .. cathode, G ₁ ~
G ₆ ... First to sixth electrodes, 41 [41 _R1 and 41 _R2 ,
41 _G1 and 41 _G2 , 41 _B1 and 41 _B2 ] ・ ・ ・ Vertical beam transmission hole, 51 [51 _R1 and 51 _R2 , 51 _G1 and 51 _G2 , 51 _B1 and 51 _B2 ] ・ ・ ・ Horizontal beam transmission Holes, _BR ( _BR1 , _BR2 ), _BG ( _BG1 , _BG2 ) and B
_B (B _B1 , B _B2 ).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiko Mizuki 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5C041 AA03 AB03 AB04 AC05 AC06

Claims (4)

[Claims] 1. An electron gun for concentrating a plurality of electron beams of the same color emitted from a cathode on a screen, comprising: a first electrode; An electron gun, wherein a beam transmitting hole is formed, and the beam transmitting hole is formed in a vertically long shape that is long in a direction perpendicular to a screen. 2. An electron gun for focusing a plurality of electron beams of the same color emitted from a cathode on a screen, comprising: a plurality of first electrodes arranged in a direction perpendicular to the screen with respect to the cathodes of the same color. An electron gun, wherein a beam transmission hole is formed, and the beam transmission hole is formed in a horizontally long shape that is long in a horizontal direction. 3. A display device comprising the electron gun according to claim 1. 4. A display device comprising the electron gun according to claim 2.