KR940003243Y1 - Electron gun for color cathode-ray tube - Google Patents

Electron gun for color cathode-ray tube Download PDF

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Publication number
KR940003243Y1
KR940003243Y1 KR2019910013139U KR910013139U KR940003243Y1 KR 940003243 Y1 KR940003243 Y1 KR 940003243Y1 KR 2019910013139 U KR2019910013139 U KR 2019910013139U KR 910013139 U KR910013139 U KR 910013139U KR 940003243 Y1 KR940003243 Y1 KR 940003243Y1
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South Korea
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electrode
electron gun
small
magnetic field
center
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KR2019910013139U
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Korean (ko)
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KR930005639U (en
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손광균
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48Electron guns
    • H01J29/488Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00Details of cathode ray tubes or electron beam tubes
    • H01J2229/48Electron guns
    • H01J2229/50Plurality of guns or beams
    • H01J2229/502Three beam guns, e.g. for colour CRTs
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48Electron guns
    • H01J29/50Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • H01J29/503Three or more guns, the axes of which lay in a common plane

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  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

내용 없음.No content.

Description

칼라브라운관의 전자총Color-Crown Gun

제1도는 본 고안 칼라브라운관의 종단면도이고,1 is a longitudinal sectional view of the present invention color brown tube,

제2도는 본 고안 전자총의 전극 구성을 분해하여 도시한 단면도.2 is an exploded cross-sectional view showing an electrode configuration of the electron gun of the present invention.

제3도는 제2도의 요부확대 사시도.3 is an enlarged perspective view of the main portion of FIG.

제4도는 본 고안 전자총을 이용한 브라운관의 화면에 나타난 스포트형상.4 is a spot shape displayed on the screen of the CRT using the present invention gun.

제5a도는 종래기술에 따른 전자총의 제4전극의 사시도.Figure 5a is a perspective view of a fourth electrode of the electron gun according to the prior art.

제5b도는 (a)도의 제4전극을 이용한 브라운관의 화면에 나타난 스포트의 형상이다.FIG. 5B is a shape of a spot shown on the screen of the CRT using the fourth electrode of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 브라운관 2 : 넥크부1: Braun tube 2: Neck part

3 : 편향요우크 4 : 패널3: deflection yoke 4: panel

5 : 섀도우마스크 7 : 전자총5: shadow mask 7: electron gun

8 : 제1전극 9 : 제2전극8: first electrode 9: second electrode

10R,10G,10B : 소구경부 11R,11G,11B : 소구경부10R, 10G, 10B: Small diameter 11R, 11G, 11B: Small diameter

12,13 : 대구경부 14 : 제3전극12,13: large diameter portion 14: third electrode

15 : 제4전극 16 : 리브15: fourth electrode 16: rib

16a : 돌출부16a: protrusion

본 고안은 칼라브라운고나의 전자총에 관한 것으로, 특히 제4전극의 중앙 전자관통홀에 형성되는 자계집속력을 증대시켜 화면의 중앙이나 양쪽사이드의 화질이 동일하게 선명해지도록 한 칼라브라운관의 전자총에 관한 것이다.The present invention relates to a color brown electron gun, and particularly to an electron gun of a color brown tube which increases the magnetic field focusing force formed in the central electron through hole of the fourth electrode so that the image quality of the center or both sides of the screen is equally clear. It is about.

일반적으로 칼라브라운관의 캐소우드에서 발사된 전자비임이 다수개의 전극으로 형성된 전자총구조체를 지나 편향요우크에 의해 90° 내지 110° 가량 편향되고나서 섀도우마스크의 홀을 통과하여 형광면의 형광체에 조사된다. 여기서, 상기 전자총에 설치된 다수개의 전극이 이 전극에 인가된 전압에 의해 소정의 자계를 형성하여 줌으로써 캐소우드에서 발사된 전자비임을 집속 또는 가속시킨다.In general, the electron beam emitted from the cathode of the color brown tube is deflected about 90 ° to 110 ° by the deflection yoke through the electron gun structure formed of the plurality of electrodes, and then passes through the hole of the shadow mask to irradiate the phosphor on the fluorescent surface. Here, a plurality of electrodes provided in the electron gun form a predetermined magnetic field by the voltage applied to the electrode to focus or accelerate the electron beam emitted from the cathode.

이러한 통상적인 전자총은 제3전극과 제4전극사이에 주렌즈가 형성되는바, 이러한 주렌즈는 구면수차가 커서 비임이 횡장화된다는 문제점이 있었다.In the conventional electron gun, a main lens is formed between the third electrode and the fourth electrode, and the main lens has a problem in that the beam is lateral because of large spherical aberration.

이러한 문제점을 해결하기위해 미국 특허 제4,086,513호로 공지된 칼라브라운관의 전자총은 제5도에 도시된 바와같이, 제4전극(31)의 소구경부(31R,31G,31B) 상하부에 섀도우마스크쪽으로 블레이드(32)를 나란히 형성하고 있다. 이러한 종래 기술에 따른 전자총은 제4전극(31)의 섀도우마스크쪽에는 수직방향으로 강한 자계를 형성하여 비임스폿이 횡장화하는 현상을 어느 정도 막아주기는 했으나, 이러한 2개의 블레이드(32)가 구비된 제4전극(31)에는 중앙의 비임관통홀인 소구경부(31G)에 형성된 자계의 구면수차가 양쪽 가장자리의 비임관통홀인 소구경부(31R,31B)에 형성된 자계의 구면수차보다 작게되어 제5b도에 도시한 바와같이 화면(33)의 중앙에 나타나는 비임스폿 형상이 횡장화된다는 문제점도 있었다.In order to solve this problem, an electron gun of a color-brown tube, which is known as US Patent No. 4,086,513, has a blade toward the shadow mask above and below the small-diameter portions 31R, 31G, and 31B of the fourth electrode 31, as shown in FIG. 32) side by side. The electron gun according to the related art forms a strong magnetic field in the vertical direction on the shadow mask side of the fourth electrode 31 to prevent the beam spot from being lateralized to some extent, but the two blades 32 are provided. In the fourth electrode 31, the spherical aberration of the magnetic field formed in the small diameter portion 31G, which is the center through hole, is smaller than the spherical aberration of the magnetic field formed in the small diameter portions 31R and 31B, which are non-through holes on both edges. As shown in Fig. 2, there is a problem in that the beam spot shape appearing in the center of the screen 33 becomes horizontal.

따라서, 본 고안은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 제4전극의 R,G,B의 비임관통 구멍중 양쪽 가장자리보다 중앙에 더 강한 자계를 형성함으로써 화면의 중심부와 주변의 화상이 모두 선명해지도록 한 칼라브라운관의 전자총을 제공함에 그 목적이 있다.Therefore, the present invention has been devised to solve the above problems, and by forming a stronger magnetic field in the center than both edges of the non-penetrating holes of the R, G, and B of the fourth electrode, the image of the center and the surroundings of the screen is reduced. Its purpose is to provide a color-brown tube electron gun that makes them all clear.

상기와 같은 목적을 달성하기 위하여 본 고안은, 제4전극의 소구경부의 상하부에 섀도우마스크쪽으로 리브가 형성된 칼라브라운관의 전자총에 있어서, 상기 리브의 소구경부 양쪽에 소구경부에 형성되는 자계를 강하게 형성하도록 돌출부를 형성한 것을 특징으로 하며, 이와같이 구성함으로써, 상기 제4전극에 형성되는 자계의 구면수차가 이 제4전극의 폭방향을 따라 일정하도록 함으로써 화면의 주변뿐만 아니라 중심부에도 화상을 선명하게 표시할 수 있다.In order to achieve the above object, the present invention, in the electron gun of the color-brown tube formed with ribs in the upper and lower portions of the small diameter portion of the fourth electrode toward the shadow mask, so as to form a strong magnetic field formed in both small diameter portion on both sides of the small diameter portion of the rib In this way, the spherical aberration of the magnetic field formed in the fourth electrode is made constant along the width direction of the fourth electrode, so that the image can be clearly displayed not only in the periphery but also in the center of the screen. Can be.

이하, 본 고안을 첨부한 예시도면을 참조로 상세히 설명한다.Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

본 고안은 브라운관(1)의 넥크부(2) 주위에 편향요우크(3)가 설치되고, 상기 브라운관(1)의 패널(4)앞쪽에는 섀도우마스크(5)가 설치되어 있고, 전자층(7)의 캐소우드에서 발사된 전자비임이 다수의 전극을 통과하면서 집속 및 가속된 다음, 상기 편향요우크(3)에 의해 편향되어 섀도우 마스크(5)를 지나 패널(4)의 형광면에 화상을 형성하도록 되어있다.In the present invention, a deflection yoke 3 is provided around the neck portion 2 of the CRT 1, and a shadow mask 5 is provided in front of the panel 4 of the CRT 1, and an electron layer ( The electron beam emitted from the cathode of 7) is focused and accelerated while passing through a plurality of electrodes, and then deflected by the deflection yoke 3 to pass an image through the shadow mask 5 to the fluorescent surface of the panel 4. It is supposed to form.

여기서, 상기 캐소우드에서 발사된 전자비임을 집속 및 가속시키는 전자총(7)의 구조는 제2도에 도시된 바와 같이, R,G,B 각각의 캐소우드에서 패널(4)쪽으로 제어전극(Control eletrode)인 제1전극(8)과 스크린(screen)전극인 제2전극(9)이 설치되고, 이 제2전극(5)의 패널(4)쪽에는 집속전극인 제3전극(14)과 가속전극인 제4전극 (15)이 설치되어 있다. 상기 제3, 제4전극(14,15)의 소구경부(10,11)와 대구경부 (12,13)로 각각 조합되면서 각각의 대구경부(12,13)가 서로 대향되어 이 2개의 대구경부(12,13)사이에 렌즈가 형성되도록 되어 있다.Here, the structure of the electron gun 7 for focusing and accelerating the electron beam emitted from the cathode is a control electrode (Control) toward the panel 4 in each of the R, G, B cathode as shown in FIG. The first electrode 8, which is an eletrode, and the second electrode 9, which is a screen electrode, are provided, and the third electrode 14, which is a focusing electrode, is provided on the panel 4 side of the second electrode 5. The fourth electrode 15, which is an acceleration electrode, is provided. The large-diameter portions 12 and 13 face each other while being combined into the small-diameter portions 10 and 11 and the large-diameter portions 12 and 13 of the third and fourth electrodes 14 and 15, respectively. A lens is formed between (12, 13).

한편. 상기 제4전극(15)의 소구경부(11R,11G,11B)의 윗쪽과 아랫쪽에는 제4전극(15)의 길이방향을 따라 리브(16)가 각각 형성되어 있고, 이들 리브(16)의 중앙부근처, 즉, 소구경부(11G)의 윗쪽과 아래쪽부분에는 화면중앙에 나타나는 비임스폿 형상이 횡장화되는 것을 방지하도록 리브(16)의 높이보다 높게 돌출된 돌출부(16a)가 형성되어 있다.Meanwhile. Ribs 16 are formed in the upper and lower portions of the small-diameter portions 11R, 11G, and 11B of the fourth electrode 15 along the longitudinal direction of the fourth electrode 15, respectively, and the center portion of the ribs 16 is formed. Protruding portions 16a protruding higher than the height of the ribs 16 are formed in the vicinity, that is, in the upper and lower portions of the small-diameter portion 11G to prevent the beam spot shape appearing in the center of the screen from being lateralized.

다음에, 이와같이 구성된 본 고안의 작용효과에 대해 설명한다.Next, the effect of the present invention constructed as described above will be described.

먼저, 전자총(7)의 앞쪽에 설치돈 R,G,B각각의 캐소우드에서 열전자가 발사되면, 이 열전자가 제1전극(8)과 제2전극(9)의 호올(8a,9a)과 제3전극(14)의 앞쪽 호올(17a)을 통과한 다음, 이 제3전극(14)의 소구경부(10)와 대구경부(12) 및 제4전극 (15)의 대구경부(13)와 소구경부(11R,11G,11B) (제3도참조)를 차례로 통과한다. 이때 , 상기 제3전극(14)과 제4전극(15)사이에 인가된 전압에 의해 전계가 형성되어 렌즈를 형성함으로써 상기 열전자를 집속 및 가속시킨다.First, when hot electrons are fired from the cathodes R, G, and B installed in front of the electron gun 7, the hot electrons are formed by the first and second electrodes 8a and 9a of the first electrode 8 and the second electrode 9, respectively. After passing through the front hole 17a of the third electrode 14, the small-diameter portion 10, the large-diameter portion 12, and the large-diameter portion 13 of the fourth electrode 15 Pass through the small-diameter portions 11R, 11G, 11B (see Figure 3). At this time, an electric field is formed by the voltage applied between the third electrode 14 and the fourth electrode 15 to form and form a lens to focus and accelerate the hot electrons.

이때, 제4전극(15)의 소구경부(11R,11G,11B)의 위쪽과 아래쪽에는 제4전극 (15)의 길이 방향을 따라 섀도우 마스크(5)쪽을 향해 리브(16)가 일체적으로 형성되어 있어, 상기 제4전극(15)의 소구경부(11R,11G,11B)쪽으로 수평전계를 강하게 형성시켜 주므로, 전자비임을 강하게 집속시켜서 상기 브라운관(1)의 넥크부(2) 주위에 설치된 편향요오크(3)가 상기와 같이 형성된 비임을 편향시켜주더라도 화면(17)의 비임스폿을 원형으로 형성시킨다.At this time, the ribs 16 are integrally formed in the upper and lower portions of the small-diameter portions 11R, 11G, and 11B of the fourth electrode 15 toward the shadow mask 5 along the longitudinal direction of the fourth electrode 15. And a strong electric field is formed toward the small-diameter portions 11R, 11G, and 11B of the fourth electrode 15, so that the electron beam is strongly concentrated to be installed around the neck portion 2 of the CRT. Even if the deflection yoke 3 deflects the beam formed as described above, the beam spot of the screen 17 is formed in a circular shape.

또, 본 고안에 있어서는 제4전극(15)에 형성된 리브(16)의 중앙근처, 즉 소구경부(11G)의 양측 리브(16)상에는 리브(16)의 높이 보다더 높게 돌출부(16a)가 형성되어 있으므로 이 제4전극(15)의 양쪽 사이드측 소구경부(11R,11B)에 형성된 자계보다 중앙의 소구경부(11G)에 형성된 자계를 더 강하게 형성해줌으로써, 화면(17)중앙의 비임 스폿을 원형으로 형성하여 전제화상을 선명하게 표시할 수 있다.In addition, according to the present invention, the protruding portion 16a is formed higher than the height of the rib 16 near the center of the rib 16 formed on the fourth electrode 15, that is, on both ribs 16 of the small-diameter portion 11G. Since the magnetic field formed in the center small-diameter portion 11G is formed stronger than the magnetic field formed in both side-side small-diameter portions 11R and 11B of the fourth electrode 15, the beam spot in the center of the screen 17 is circular. The entire image can be clearly displayed by forming the image.

앞에서 설명한 바와같이 본 고안에 의하면, 섀도우마스크(5)쪽을 향해 제4전극(15)의 소구경부(11R,11G,11B)의 상하부에 리브(16)를 형성하고, 이 리브(16)의 증앙근처에 주변보다 높게 돌출부(16a)를 형성한 것에 의해, 제4전극(15)에 형성된 자계의 구면수차를 화면의 폭방향을 따라 일정하게 해줌으로써 화면(17)의 주변뿐만 아니라 중앙에도 화상을 선명하게 표시할 수 있다는 효과가 있다.As described above, according to the present invention, the ribs 16 are formed on the upper and lower portions of the small-diameter portions 11R, 11G, and 11B of the fourth electrode 15 toward the shadow mask 5. By forming the protrusion 16a near the center of gravity, the spherical aberration of the magnetic field formed in the fourth electrode 15 is made constant along the width direction of the screen, so that the image is not only around the screen 17 but also in the center. There is an effect that can be displayed clearly.

Claims (1)

제4전극(15)의 소구경부(11R,11G,11B)의 상하부에 섀도우마스크(5)쪽으로 리브(10)가 형성된 칼라브라운관의 전자총에 있어서, 상기 리브(16)의 소구경부(11G)양쪽에 소구경부(11G)에 형성되는 자계를 강하게 형성하도록 돌출부(16a)를 형성한 것을 특징으로 하는 칼라브라운관의 전자총.An electron gun of a color-brown tube in which ribs 10 are formed in the upper and lower portions of the small-diameter portions 11R, 11G, and 11B of the fourth electrode 15 toward the shadow mask 5, on both sides of the small-diameter portions 11G of the ribs 16. An electron gun of a color-brown tube, characterized in that a protrusion (16a) is formed so as to strongly form a magnetic field formed in the small-diameter portion (11G).
KR2019910013139U 1991-08-19 1991-08-19 Electron gun for color cathode-ray tube KR940003243Y1 (en)

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KR930005639U KR930005639U (en) 1993-03-22
KR940003243Y1 true KR940003243Y1 (en) 1994-05-16

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