KR940007247B1 - Electron gun for c-crt - Google Patents

Electron gun for c-crt Download PDF

Info

Publication number
KR940007247B1
KR940007247B1 KR1019920001779A KR920001779A KR940007247B1 KR 940007247 B1 KR940007247 B1 KR 940007247B1 KR 1019920001779 A KR1019920001779 A KR 1019920001779A KR 920001779 A KR920001779 A KR 920001779A KR 940007247 B1 KR940007247 B1 KR 940007247B1
Authority
KR
South Korea
Prior art keywords
focus
electrode
electron beam
electron gun
cathode ray
Prior art date
Application number
KR1019920001779A
Other languages
Korean (ko)
Other versions
KR930018634A (en
Inventor
김창희
Original Assignee
삼성전관 주식회사
김정배
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전관 주식회사, 김정배 filed Critical 삼성전관 주식회사
Priority to KR1019920001779A priority Critical patent/KR940007247B1/en
Publication of KR930018634A publication Critical patent/KR930018634A/en
Application granted granted Critical
Publication of KR940007247B1 publication Critical patent/KR940007247B1/en

Links

Classifications

    • 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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

The electron gun for a color cathode ray tube includes three first, second and third focus electrodes forming a unipotential static lens, and a final accelerating electrode forming a main lens, wherein the electron beam passing hole formed on the outgoing side of the first focus electrode is greater than that of the second and third focus electrodes, thereby improving spherical aberration and focusing characteristic.

Description

칼라 음극선판용 전자총Electron gun for color cathode ray board

제1도는 종래 칼라 음극선관용 전자총의 입단면도.1 is a cross-sectional view of an electron gun for a conventional color cathode ray tube.

제2도는 종래 전자총의 빔궤적을 가시화시켜 나타낸 전자총의 열부절제 단면도.2 is a cross-sectional view of heat suppression of an electron gun, which is made by visualizing a beam trajectory of a conventional electron gun.

제3도는 본 발명에 따른 칼라 음극선관용 전자총의 입단면도.3 is a cross-sectional view of an electron gun for a color cathode ray tube according to the present invention;

제4도는 본 발명에 따른 칼라 음극선관용 전자총의 빔궤적을 가시화시켜 나타내 보인 전자총의 일부절제단면도.Figure 4 is a partial cross-sectional view of the electron gun shown by visualizing the beam trajectory of the electron gun for color cathode ray tube according to the present invention.

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

2l : 캐소오드, 22 : 제어전극,2l: cathode, 22: control electrode,

23 : 스크린전극, 24 : 제 1포커스전극,23: screen electrode, 24: first focus electrode,

24H : 전자빔통과공, 25 : 제 2 포커스전극,24H: electron beam through hole, 25: second focus electrode,

25H : 전자빔통과공. 26 : 제 3포커스전극,25H: electron beam passing through. 26: third focus electrode,

27 : 최종가속전극,θ: (전자빔의)입사각.27: final acceleration electrode, θ: incident angle (of the electron beam).

본 발명은 칼라 음극선관용 전자총에 관한 것으로서, 더 상세하게는 주렌즈로 입사되는 전자빔의 입사각을 출여 구면수차의 감소 및 포커스특성을 향상시킬 수 있도록 된 칼라 음극선관용 전자총에 관한 겻이다.The present invention relates to an electron gun for a color cathode ray tube, and more particularly, to an electron gun for a color cathode ray tube which can reduce the spherical aberration and improve focus characteristics by outputting an incident angle of an electron beam incident on a main lens.

통상적으로 음극선관의 네크부에 봉입되어 열전자를 방출하는 전자총은 이를 구성하는 각 전극에 인가되는 전위 인가방식에 유니포텐셜포커스타입 전자총, 바이포텐셜포커스타입 전자총 및 이들을 병합한 형태의 전자총이 있는데, 제1도에는 이러한 전자총중 유니-바이포텐셜포커스타입(Uni-Bi potential focus Tpe)전자총의 일예를 나타내 보였다.In general, an electron gun encapsulated in the neck portion of a cathode ray tube emits thermal electrons, and there is a potential application method applied to each electrode constituting the cathode ray tube. 1 shows an example of the Uni-Bi potential focus Tpe electron gun.

이것은 전치삼극관부를 이루는 캐소오드(11) 제어전극(12) 및 스크린전극(13)과 보조 및 주렌즈계를 이루는 제1포커스전극(14), 제 2포커스전극(15) 및 제 3포커스전극(16)과 최종가속진극(17)올 구비하여 구성된다. 이와 같이 구성된 종래 칼라 음극선관용 전자총(10)은 각 전극에 소정의 전위가 인가됨에 따라 상기 스크린전극(l3)과 제 1포커스전극(l4)사이에 프리포커스렌즈가 형성되고 상기 제1,2,3포커스전극(14)(15)(16)사이에 유니포텐셜 정전렌즈가 형성되며, 상기 제3포커스전극(16)과 최종가속전극(17)사이에 바이포텐셜형 주정전렌즈가 형성된다. 따라서 상기 캐소오드(11)로부터 방출된 전자빔은 상기 프리포커스렌즈 및 유니포텐셜형 정점렌즈에서 예비접속 및 가속된 후 바이포탠설형 주정전롄즈에 입사되어 최종접속 및 가속된후 형광막에 랜딩됨으로써 화면을 이루게 된다. 그런데, 상기와 같은 전자총은 전자빔을 다단집속함에도 불구하고 제2도에 나타내 보인 바와 같이 주렌즈로의 입사각(θ1)이 커 주렌즈를 통과하는 전자빔이 많은 구면수차를 반게 되고 결과적으로 화면의 중앙과 주변부에서의 포커스차이의 의해 화면의 해상도가 저하되게되는 문제점이 있었다.This is the first focusing electrode 14, the second focusing electrode 15, and the third focusing electrode 16 forming the auxiliary and main lens systems with the cathode 11 control electrode 12 and the screen electrode 13 forming the pre-triode tube part. ) And the final acceleration acceleration pole (17). In the conventional color cathode ray tube electron gun 10 configured as described above, as a predetermined potential is applied to each electrode, a prefocus lens is formed between the screen electrode l3 and the first focus electrode l4, and the first, second, Unipotential electrostatic lenses are formed between the three focusing electrodes 14, 15, and 16, and bipotential main capacitive lenses are formed between the third focusing electrode 16 and the final acceleration electrode 17. Accordingly, the electron beam emitted from the cathode 11 is preliminarily connected and accelerated by the prefocus lens and the unpotential vertex lens, and then enters the bipotential type cast iron lianz, and is landed on the fluorescent film after the final connection and acceleration. Will be achieved. However, although the electron gun is focused on the electron beam as shown in FIG. 2, the incident angle (θ 1 ) to the main lens is large, and the electron beam passing through the main lens has many spherical aberrations. There is a problem that the resolution of the screen is lowered due to the difference in focus between the center and the peripheral portion.

본 발명은 상기 문제점을 해결하기 의하여 창출된 것으로서, 주렌즈로 입사되는 전자빔의 구면수차를 출여 형광막의 전영역에서 전자빔의 포커스차를 극소화할 수 있으며, 나아가서는 음극선관의 화면해상도를 향상시킬 수 있는 칼라 음극선관용 전자총을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, by emitting spherical aberration of the electron beam incident to the main lens can minimize the focus difference of the electron beam in the entire region of the fluorescent film, and further improve the screen resolution of the cathode ray tube The purpose is to provide an electron gun for a colored cathode ray tube.

상기 목적을 달성하기 위하여 본 발명은 유니포텐셜형 정전렌즈를 이루는 세개의 제1,2,3포커스전극과,상기 제3포커스전극과 인접되게 설치되어 바이포텐셜형 주정전렌즈를 이루는 최종가속 전극을 포함하여된칼라 음극선관용 전자총에 있어서, 상기 제1포커스전극의 출사측면에 형성된 전자빔통과공의 크기를 상기제2,3포커스전극의 전자빔통과공보다 크게 형성하여 된 것을 그 특징으로 한다.In order to achieve the above object, the present invention provides three first, two, and three focus electrodes forming a unipotential type electrostatic lens, and a final acceleration electrode installed adjacent to the third focus electrode to form a bipotential main capacitive lens. The included electron gun for color cathode ray tube, characterized in that the size of the electron beam through holes formed on the emission side of the first focus electrode is larger than the electron beam through holes of the second and third focus electrodes.

이하 칩부된 도면을 참조하여 본 발명에 따른 한 바람직한 실시에를 상세하게 설명하면 다음과 같다.Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

제3도에 나타내 보인 본 발명에 다른 칼라 음극선관용 전자총(20)은 전치삼극관부를 이루는 캐소오드(21), 제어전극(22) 및 스크린전극(23)과 보조 및 주렌즈계를 이루는 제1,2,3포커스전극(24)(25)(26)과 주렌즈계를 이루는 최종가속전국(27)을 구비하여 구성된다. 그리고 각 전극에는 소정의 전위가 인가되는데,상기 스크린전극(23)에는 소정의 정전압(Vs)이 인가되고 상기 제1,3포커스전극(24)(26)에는 소정의 포커스전압(Vf)이 인가되며 상기 제2포커스전극(25)에는 상기 포커스전압(Vf)보다 낮은 전압 또는 편향신호에 동기하는 전압(Vfd)이 인가된다. 그리고 상기 제1포커스전극(24)의 출사측면에 형성된 양측의 전자빔통과공(24H)은 그 크기가 본 발명의 특징에 따라 인짐하는 제2,3포커스전극(25)(26)의 전자빔통과공(25H)(26H)의 크기보다 크며 제1포커스전극(24)의 중심축(Cl)은 제2,3포커스전극(24)(25)의 중심축(C2)에 대해의 측방향으로 편심져 있다.The electron gun 20 for the color cathode ray tube according to the present invention shown in FIG. 3 includes the cathode 21, the control electrode 22, and the screen electrode 23, which form the pre-triode tube part, and the first and second lenses. And a final focusing station 27 constituting the three focus electrodes 24, 25, 26 and the main lens system. A predetermined potential is applied to each electrode, and a predetermined constant voltage Vs is applied to the screen electrode 23, and a predetermined focus voltage Vf is applied to the first and third focus electrodes 24 and 26. In addition, a voltage lower than the focus voltage Vf or a voltage Vfd synchronized with the deflection signal is applied to the second focus electrode 25. In addition, the electron beam through holes 24H of both sides formed on the emission side surface of the first focus electrode 24 have electron beam through holes of the second and third focus electrodes 25 and 26 whose sizes are in accordance with the characteristics of the present invention. It is larger than the size of (25H) and (26H), and the central axis Cl of the first focus electrode 24 is eccentric with respect to the central axis C2 of the second and third focus electrodes 24 and 25. have.

이와 같이 구성된 본 발명에 따른 칼라 음극선관용 전자총의 작용을 설명하면 다음과 같다.Referring to the operation of the electron gun for the color cathode ray tube according to the present invention configured as described above are as follows.

먼저 상기 전자총의 각 전극에 소정의 전위가 인가되게 되면 상기 스크린전극(23)과 제1포커스전극(24)사이에 프리포커스렌즈가 형성되게 되고, 상기 제1,2,3포커스전극(24)(25)(26)에 의해 유니포텐설형 정전렌즈가 형성되게 되는데, 이 유니포텐설형 정전렌즈는 상기 제1포커스전극(24)의 출사측면에 형성된 전자빔동과공(24H)이 인접하는 전자빔통과공(25H)<26H)보다 크고 그 중심축(C1)이 소정량 펀심져 있으므로비대칭으로 형성되게 된다. 따라서 각 캐소오드(22)로부터 방출된 적색 및 청색신호 전자빔은 상기 유니포톈실 정전렌즈가 경사져 있으며 이를 통과한 양측 전자빔은 중앙의 전자빔측으로 콘버어젼스되게 된다. 따라서 이를 통과한 전자빔은 제4도에 나타내 보인 바와 같이 바이포텐실형 주정전렌즈로의 입사각(θ2)이 작아지게 되므로 이 주정전렌즈에서의 구면수차를 작게 받게 되고 나아가서는 전자빔의 촛점거리가 길어지게되어 형광막의 중앙과 주변부에서 균열한 포커스특성을 얻을 수 있게 된다.First, when a predetermined potential is applied to each electrode of the electron gun, a prefocus lens is formed between the screen electrode 23 and the first focus electrode 24, and the first, second and third focus electrodes 24 are formed. (25) and (26), a unipotential electrostatic lens is formed, and the unipotential electrostatic lens has an electron beam through hole adjacent to the electron beam cavity 24H formed on the emission side of the first focus electrode 24. Since the central axis C1 is larger than the ball 25H < 26H, the predetermined amount is punctured, so that it is formed asymmetrically. Accordingly, the red and blue signal electron beams emitted from the cathodes 22 are inclined by the unpotian yarn electrostatic lens, and the two electron beams passing through the cathode 22 are converged toward the center electron beam side. Therefore, as shown in FIG. 4, the electron beam passing through the beam becomes smaller in the incident angle θ 2 to the bipotencil-type main capacitive lens, so that the spherical aberration of the main capacitive lens is reduced, and the focal length of the electron beam is further reduced. It becomes long, so that the focus characteristic cracked at the center and the peripheral portion of the fluorescent film can be obtained.

이와 같이 본 발명 칼라 음극선관용 전자총은 주렌즈로 입사되는 전자빔의 입사각을 줄여 전자빔에 작용하는 구면수차 및 포커스특성을 향상시켜 이를 제용한 음극선관의 해상도를 향상시킬 수 있는 이점을 가진다.As described above, the electron gun for the color cathode ray tube according to the present invention has an advantage of improving the spherical aberration and focus characteristic applied to the electron beam by reducing the incident angle of the electron beam incident to the main lens, thereby improving the resolution of the cathode ray tube using the same.

Claims (2)

유니포텐셜형 정전렌즈를 이루는 세개의 제1,2,3포커스전극과, 상기 제3포커스전극과 인접되게 설치되어 주렌즈를 이루는 최종가속전극을 포함하여 된 칼라 음극선관용 전자총에 있어서, 상기 제1포커스전극(24)의 출사측면에 형성된 전자빔통과공(24H)의 크기를 상기 제2,3포커스전극(25)(26)의 전자빔통과공(25H)(26H)보다 크게 형성하여 된 것을 특징으로 하는 칼라 음극선관용 전자총.An electron gun for a color cathode ray tube comprising three first, second and third focus electrodes forming a unipotential electrostatic lens and a final acceleration electrode disposed adjacent to the third focus electrode to form a main lens. The size of the electron beam passing holes 24H formed on the emission side of the focus electrode 24 is larger than the electron beam passing holes 25H and 26H of the second and third focus electrodes 25 and 26. Electron gun for color cathode ray tube to say. 제l항에 있어서, 상기 유니포텐셜형 정전렌즈를 이루는 제1포커스전극(24)의 전자빔통과공(24H)의중심(C1)이 인접하는 제2포커스전극(25)의 전자빔통과공(25H)의 중심(C2)에 대해 외측으로 편심된 것을특정으로 하는 칼라 음극선관용 전자총.The electron beam passing hole 25H of the second focus electrode 25 adjacent to the center C 1 of the electron beam passing hole 24H of the first focusing electrode 24 constituting the unipotential electrostatic lens. Electron gun for color cathode ray tubes, characterized by being eccentrically outward with respect to the center C 2 ).
KR1019920001779A 1992-02-07 1992-02-07 Electron gun for c-crt KR940007247B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920001779A KR940007247B1 (en) 1992-02-07 1992-02-07 Electron gun for c-crt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920001779A KR940007247B1 (en) 1992-02-07 1992-02-07 Electron gun for c-crt

Publications (2)

Publication Number Publication Date
KR930018634A KR930018634A (en) 1993-09-22
KR940007247B1 true KR940007247B1 (en) 1994-08-10

Family

ID=19328711

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920001779A KR940007247B1 (en) 1992-02-07 1992-02-07 Electron gun for c-crt

Country Status (1)

Country Link
KR (1) KR940007247B1 (en)

Also Published As

Publication number Publication date
KR930018634A (en) 1993-09-22

Similar Documents

Publication Publication Date Title
KR890003825B1 (en) Electron gun for crt
KR940010986B1 (en) Electron gun for c-crt
KR930007583Y1 (en) Electron gun for cathode-ray tube
KR100201762B1 (en) Color cathode ray tube having improved focus
US6614156B2 (en) Cathode-ray tube apparatus
JP2919811B2 (en) Electrostatic field control electrode configuration of color CRT electron gun
KR940007247B1 (en) Electron gun for c-crt
KR19980032775A (en) A color cathode-ray tube with a small neck diameter
KR100377399B1 (en) Electron gun for color cathode ray tube
KR100291924B1 (en) Electron gun and cathode ray tube utilizing the same
KR100258910B1 (en) Electron gun for cathode ray tube
US4399388A (en) Picture tube with an electron gun having non-circular aperture
JP3672390B2 (en) Electron gun for color cathode ray tube
KR950000650B1 (en) Electron gun for cathode-ray tube
KR100232156B1 (en) Electron gun for color crt
KR940008760B1 (en) Electron gun for c-crt
KR940003244Y1 (en) Electron gun for cathode-ray tube
KR950002743B1 (en) Electron gun for c-crt
KR100342043B1 (en) Electron gun for color cathode ray tube
KR940006548Y1 (en) Electron gun for c-crt
KR940005270Y1 (en) Electron gun for c-crt
KR100319087B1 (en) Electron gun for color cathode ray tube
KR100258905B1 (en) Electron gun for color cathode ray tube
KR960012415B1 (en) Electron gun in crt
KR950000651B1 (en) Electron gun for color cathode-ray tube

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20080728

Year of fee payment: 15

LAPS Lapse due to unpaid annual fee