KR970010041B1 - Electron gun for cathode - ray tube - Google Patents

Electron gun for cathode - ray tube Download PDF

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Publication number
KR970010041B1
KR970010041B1 KR1019920016144A KR920016144A KR970010041B1 KR 970010041 B1 KR970010041 B1 KR 970010041B1 KR 1019920016144 A KR1019920016144 A KR 1019920016144A KR 920016144 A KR920016144 A KR 920016144A KR 970010041 B1 KR970010041 B1 KR 970010041B1
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South Korea
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electrode
electron gun
diameter
focusing
inner diameter
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KR1019920016144A
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Korean (ko)
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KR940007948A (en
Inventor
황철호
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엘지전자 주식회사
구자홍
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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

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  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

A circular portion(21a) which has an inner diameter corresponding to an outer diameter of an electrode support(31) is formed on one end of an upper electrode(21). A second circular portion(22b) which has a same inner diameter as the circular portion(21a) is formed on one end portion of a lower electrode(22). An empty portion(22a) which has a same inner diameter as an outer diameter of an upper support(32) is formed at a tip surface of the second circular portion(22b)

Description

음극선관용 전자총구체의 집속용 전극구조Electrode structure for focusing electron barrel for cathode ray tube

제1도 및 제2도는 종래 칼라수상관용 전자총의 서로 다른 실시형태를 보인 단면도.1 and 2 are cross-sectional views showing different embodiments of a conventional color gun electron gun.

제3도는 종래 칼라수상관용 전자총의 집속전극 조립방법 설명도.3 is an explanatory diagram of a method for assembling the focusing electrode of a conventional electron gun for color water tubes.

제4도는 종래 집속전극의 하부전극 구성도.4 is a lower electrode configuration of a conventional focusing electrode.

제5도는 본 발명에 적용되는 집속전극의 하부전극 구성도.5 is a bottom electrode configuration of the focusing electrode applied to the present invention.

제6도는 본 발명에 의한 집속전극 조립방법 설명도.6 is an explanatory diagram of a focusing electrode assembly method according to the present invention.

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

20 : 접속전극 21 : 상부전극20: connecting electrode 21: upper electrode

21a : 공경부분 22 : 하부전극21a: pore portion 22: lower electrode

22a : 공경부분 22b : 계단상 부분22a: Aperture part 22b: Stair part

30 : 멘드렐 31 : 전극지지부30: mandrel 31: electrode support

32 : 상단지지부32: upper support

본 발명은 음극선관용 전자총구체의 집속용 전극구조에 관한 것으로, 특히 고 집속전압 전자총의 집속전극의 하부전극의 공경부분 주위를 계단상 구조로 형성하여 상, 하부전극의 조립 정도를 향상함으로써 전자총의 포커스(focus) 특성을 향상하도록 한 음극선관용 전자총구체의 집속용 전극구조에 관한 것이다.The present invention relates to an electrode structure for focusing an electron gun sphere for a cathode ray tube, and in particular, a stepped structure is formed around the lower diameter portion of the lower electrode of the focusing electrode of a high focusing electron gun to improve the degree of assembly of the upper and lower electrodes. The present invention relates to an electrode structure for focusing an electron barrel for cathode ray tubes to improve focus characteristics.

일반적으로 종래의 칼라수상관용 전자총에는 제1도의 BPF(Bi-Potential focus lens) 전자총과, 제2도의 Hi-BPF(High-BPF) 전자총이 사용되고 있는 바, 이러한 종래의 칼라수상관용 전자총은 수상관측과 직교해서 힐직선상에 등간격으로 배열된 3개의 옴극(1A)(1B)(1C)과, 이 옴극(1A)(1B)(1C) 쪽으로부터 스크린(도시하지 않음)을 향하여 소정간격을 두고 배설되며, 상기 옴극(1A)(1B)(1C)으로부터 방사되는 3본의 전자비임에 대향한 전자비임 통과용 개구를 가진 제1그리드(2), 제2그리드(3), 제3그리드(접속전극)(4) 및 양극(5)을 갖추고 있다.In general, a conventional BPF (Bi-Potential focus lens) gun and a Hi-BPF (High-BPF) gun of FIG. 2 are used for a color water tube gun. Three ohmic poles 1A, 1B, 1C arranged at equal intervals on the heel line at right angles to the screen, with a predetermined distance from the ohmic poles 1A, 1B, 1C toward the screen (not shown). The first grid 2, the second grid 3, and the third grid having openings for electron beam passing through the three electron beams emitted from the ohmic poles 1A, 1B, and 1C are disposed. Connection electrode) 4 and anode 5 are provided.

상기 옴극(1A)(1B)(1C), 제1그리드 전극(2), 제2그리드 전극(3)을 3극부라고 부르며, 통상 옴극(1A)(1B)(1C)에는 0∼200V의 가변전압, 제1그리드 전극(2)에는 0V, 제2그리드(3)에는 약 600V 전압이 인가되어 전자빔(6A), (6B), (6C)이 형성된다.The ohmic poles 1A, 1B, 1C, the first grid electrode 2, and the second grid electrode 3 are called three-pole portions, and in general, the ohmic poles 1A, 1B, 1C vary from 0 to 200V. A voltage, 0 V is applied to the first grid electrode 2 and about 600 V is applied to the second grid 3 to form electron beams 6A, 6B, and 6C.

그리고, 제1도의 BPF(Bi-Potential focus lens) 전자총은 집속전극에 양극전압의 20% 정도가 인가되고, 제2도의 Hi-BPF(High-BPF) 전자총은 집속전극에 양극전압 28% 정도가 인가된다.The Bi-Potential Focus Lens (BPF) electron gun of FIG. 1 applies about 20% of the anode voltage to the focusing electrode, and the Hi-BPF (High-BPF) Electron Gun of FIG. Is approved.

상기와 같은 구성된 종래의 칼라수상관용 전자총은 각 전극의 비임통로에 대한 직각도, 각 전극간의 평행도 및 각 전극에 대응하는 개구 사이의 동축도를 유지하기 위하여 각 전극의 3개의 개구가 직선상에 배치되어 서로 평행을 유지한 3본의 중심을 통과하며 또한 각 전극 사이의 간격부에는 서로 평행한 면을 가진 스페이서를 삽입하여 조립한다.In the conventional color water tube electron gun constructed as described above, three openings of each electrode are arranged on a straight line to maintain the perpendicularity to the non-passage path of each electrode, the parallelism between each electrode, and the coaxiality between the openings corresponding to each electrode. Spacers passing through the centers of the three bones arranged and kept in parallel with each other and inserted into spacers having planes parallel to each other are inserted in the gaps between the electrodes.

제3도는 종래 칼라수상관용 전자총의 제3그리드 전극의 구조 및 조립 방법을 설명하기 위한 도면으로서, 일반적으로 제3그리드 전극은 길이가 약 15∼23mm 정도로서 2개 이상의 복수개의 전극을 조립하여 구성되는바, 도시한 바와 같이, 상부전극(11)과, 하부전극(12)을 동축상에 일치시키기 위하여 조립용 멘드렐(13)에 삽입한 후 용접에 의해 고정하며, 이때 상부전극(11)의 공경부분(11a)과 하부전극(12)의 공경부분(12a)이 상이하므로 조립용 맨드렐(13)의 상부전극 지지부분(13a)과 하부전극 지지부분(13b)의 치수도 상이하게 된다. 그리고, 조립용 멘드렐의 치수는 전극의 최소공경보다도 0.015∼0.020mm 정도 적게 설계되어 있다.3 is a view for explaining the structure and assembly method of the third grid electrode of the conventional color gun electron gun, generally the third grid electrode is about 15 to 23mm in length is composed of assembling two or more of the plurality of electrodes As shown in the drawing, the upper electrode 11 and the lower electrode 12 are inserted into the assembling mandrel 13 so as to coincide with each other and then fixed by welding. Since the pore portion 11a of the pore portion 11a and the lower electrode 12 are different, the dimensions of the upper electrode support portion 13a and the lower electrode support portion 13b of the assembly mandrel 13 are also different. The assembly mandrel is designed to be about 0.015 to 0.020 mm smaller than the minimum pore size of the electrode.

상기와 같이 집속전극을 조립함에 있어서, 상부전극(11)의 공경부분(11a)은 버링 가공에 의해 형성되므로 진원도가 완전하지 않으며, 이에 따라 멘드렐(13)의 직경을 보다 적게 할 필요가 있고 이 때문에 하부전극(12) 조립시 동축이 되지 않고 상, 하부전극(11)(12)이 편심되는 현상이 발생되었다.In assembling the focusing electrode as described above, since the pore portion 11a of the upper electrode 11 is formed by a burring process, the roundness is not perfect, and thus the diameter of the mandrel 13 needs to be made smaller. For this reason, the phenomenon in which the upper and lower electrodes 11 and 12 are eccentric without coaxiality when the lower electrode 12 is assembled is generated.

그리고, 상기와 같은 집속전극의 편심은 전자총의 포커스 특성열화, 특히 헤일로우(halo) 현상을 일으키는 요인이 되었고, BPF 전자총 보다는 Hi-BPF 전자총의 경우 집속전극이 길게 되므로 더욱 심각한 문제를 야기시키게 되는 것이었다.In addition, the eccentricity of the focusing electrode as described above causes deterioration of focus characteristics of the electron gun, in particular a halo phenomenon, and causes a more serious problem because the focusing electrode is longer in the case of the Hi-BPF electron gun than the BPF electron gun. Was.

본 발명은 상기한 바와 같은 종래의 결함을 해소하기 위하여 창안한 것으로 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is invented to solve the conventional defects as described above and described in detail by the accompanying drawings as follows.

제5도는 본 발명에 의한 집속전극의 하부전극를 보인 단면도이고, 제6도는 본 발명에 의한 집속전극 조립방법 설명도로서, 본 발명은 상부전극(21)과 조립되는 하부전극(22)의 공경부분(22a) 주위에 계단상 원통부분(22b)이 형성된 것을 특징으로 하고 있다.5 is a cross-sectional view illustrating a lower electrode of the focusing electrode according to the present invention, and FIG. 6 is an explanatory view of a method of assembling the focusing electrode according to the present invention, and the present invention is a pore portion of the lower electrode 22 assembled with the upper electrode 21. A stepped cylindrical portion 22b is formed around 22a.

보다 구체적으로 설명하면, 집속전극(20)의 상부전극(21)과 하부전극(22)을 조립함에 있어서, 하부전극(22)의 공경부분(22a) 주위를 계단상 원통부분(22b)을 형성하고, 상부전극(21)과 하부전극(22)을 지지하는 조립용 멘드렐(30)의 대경의 전극지지부(31)를 상부전극(21)의 원통형 공경부분(21a)이 삽입되는 하부에서 하부전극(22)의 공경부분(22a)이 삽입되는 소경의 상단지지부(32)의 직전까지 동일한 직경으로 연장 형성하여 상, 하부전극(21)(22)을 편심없이 조립하도록 되어 있다.More specifically, in assembling the upper electrode 21 and the lower electrode 22 of the focusing electrode 20, a stepped cylindrical portion 22b is formed around the pore portion 22a of the lower electrode 22. The large diameter electrode support portion 31 of the assembling mandrel 30 supporting the upper electrode 21 and the lower electrode 22 is disposed at a lower portion below the cylindrical hole 21a of the upper electrode 21 is inserted. The upper and lower electrodes 21 and 22 are formed without eccentricity by extending to the same diameter until immediately before the upper support portion 32 of the small diameter into which the pore portion 22a of the electrode 22 is inserted.

이러한 본 발명의 바람직한 한 실시예는 상기 하부전극(22)의 계단상 원통부분(22b)이 상부전극(21)의 원통형 공경부분(21a)의 치수와 동일하게 형성되고, 상기 멘드렐(30)의 전극지지부(31)가 상기 상부전극(21)의 원통형 공경부분(21a)과 하부전극(22)의 계단상 원통부분(22b)의 공경치수에 맞도록 설계되며, 상단지지부(32)가 하부전극(22)의 평판상 공경부분(22a)에 맞도록 설계된 구성으로 되어 있다.According to one preferred embodiment of the present invention, the stepped cylindrical portion 22b of the lower electrode 22 is formed to have the same dimensions as the cylindrical pore portion 21a of the upper electrode 21, and the mandrel 30 The electrode support part 31 of the upper electrode 21 is designed to fit the pore size of the cylindrical diameter portion 21a of the upper electrode 21 and the stepped cylindrical portion 22b of the lower electrode 22, the upper support portion 32 is lower The electrode 22 has a structure designed to fit the plate-shaped pore portion 22a.

본 발명에 따라 상기 조립용 멘드렐(30)에 접속전극(20)의 상부전극(21) 및 하부전극(22)을 순차적으로 삽입고정시킨 후 결합부(40)를 저항 용접, 레이저 용접 등으로 접합하는 것에 의하여 집속전극의 조립이 완료되는 것인 바, 이때 하부전극(22)의 상부전극(21)의 원통형 공경부분(21a)와 하부전극(22)의 계단상 원통부분(22b)의 직경을 동일하게 형성되어 있고, 멘드렐(30)의 대경의 전극지지부분(31)이 상부전극(21)의 원통형 공경부분(21a)와 하부전극(22)의 계단상 원통부분(22b)에 일치하는 부분에 걸쳐서 동일직경으로 형성된 것을 사용할 수 있으므로 상, 하부전극(21, 22)이 편심된 상태로 조립되는 일이 없이 정확하게 결합되어 집속전극의 조립 불량율을 종래에 비하여 약 1/10으로 감소하였을 뿐아니라 음극선관 완성후 포커스 특성 열화불량을 대폭 감소할 수 있으며, 품위도 향상시킬 수 있게 되는 이점이 있다.According to the present invention, after inserting and fixing the upper electrode 21 and the lower electrode 22 of the connecting electrode 20 to the assembly mandrel 30 in sequence, the coupling part 40 may be formed by resistance welding, laser welding, or the like. The assembly of the focusing electrode is completed by joining, in which case the diameter of the cylindrical pore portion 21a of the upper electrode 21 of the lower electrode 22 and the stepped cylindrical portion 22b of the lower electrode 22 is used. Are formed in the same manner, and the large diameter electrode support portion 31 of the mandrel 30 coincides with the cylindrical pore portion 21a of the upper electrode 21 and the stepped cylindrical portion 22b of the lower electrode 22. Since the upper and lower electrodes 21 and 22 are assembled without being eccentrically assembled, the assembly failure rate of the focusing electrode can be reduced to about 1/10 compared to the conventional one. In addition, after completion of the cathode ray tube, the deterioration of focus characteristics can be greatly reduced. Was, there is an advantage that dignity can be improved.

Claims (1)

상부전극(21)과 하부전극(22)을 조립하는 것에 있어서, 상기 상부전극(21)의 일단에 멘트렐(30)의 대경의 전극지지부(31) 외경에 일치하는 내경을 가지는 원통형 공경부분(21a)을 형성하고, 상기 하부전극(22)의 일단부에는 상기 원통형 공경부분(21a)과 동일한 내경을 가지는 계단상 원통부분(22b)을 형성하고 이 계단상 원통부분(22b)의 선단면에 멘드렐의 소경의 상단지지부(32) 외경에 일치하는 내경을 가지는 공경부분(22a)을 형성하여서 된 것을 특징으로 하는 음극선관용 전자총구체의 접속용 전극구조.In assembling the upper electrode 21 and the lower electrode 22, a cylindrical pore portion having an inner diameter at one end of the upper electrode 21, the inner diameter of which matches the outer diameter of the electrode support part 31 of the large diameter of the mentrel 30 ( 21a), and a stepped cylindrical portion 22b having the same inner diameter as the cylindrical pore portion 21a is formed at one end of the lower electrode 22, and at the front end surface of the stepped cylindrical portion 22b. An electrode structure for connecting an electron gun sphere for cathode ray tubes, characterized in that a hole diameter portion (22a) having an inner diameter corresponding to the outer diameter of the upper support portion (32) of the small diameter of the mandrel is formed.
KR1019920016144A 1992-09-04 1992-09-04 Electron gun for cathode - ray tube KR970010041B1 (en)

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KR970010041B1 true KR970010041B1 (en) 1997-06-20

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