KR200162822Y1 - Cathode ray tube - Google Patents
Cathode ray tube Download PDFInfo
- Publication number
- KR200162822Y1 KR200162822Y1 KR2019960017706U KR19960017706U KR200162822Y1 KR 200162822 Y1 KR200162822 Y1 KR 200162822Y1 KR 2019960017706 U KR2019960017706 U KR 2019960017706U KR 19960017706 U KR19960017706 U KR 19960017706U KR 200162822 Y1 KR200162822 Y1 KR 200162822Y1
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- South Korea
- Prior art keywords
- electrode
- cathode
- control
- thermal deformation
- present
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/484—Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
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- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
본 고안은 브라운관 전자총의 개선된 제1전극을 개시한다.The present invention discloses an improved first electrode of a CRT gun.
제어전극이 되는 제1전극은 캐소드에 인접되어 열변형됨으로써 제어특성이 변화되는 문제가 있는 바, 본 고안에서는 제어구멍 둘레에 캐소드를 향해 깔때기 형태의 인입부를 형성함으로써 제1전극의 열변형을 억제하는 동시에 열변형과 제어구멍의 열팽창을 보상하여 방지하도록 하였다.The first electrode serving as the control electrode has a problem in that the control characteristic is changed by thermal deformation adjacent to the cathode. In the present invention, a funnel-shaped inlet toward the cathode is formed around the control hole to suppress thermal deformation of the first electrode. At the same time, thermal deformation and thermal expansion of the control holes are compensated for.
Description
제1도는 제1전극부근의 종래의 전자총의 단면도,1 is a cross-sectional view of a conventional electron gun near the first electrode,
제2도는 본 고안 제1전극의 요부사시도,2 is a perspective view of the main electrode of the present invention
제3도는 본 고안에 의한 전자총의 제1전극 부근의 단면도이다.3 is a cross-sectional view of the vicinity of the first electrode of the electron gun according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
K : 캐소드(cathode) G1 : 제1전극K: cathode G1: first electrode
1 : 인입부(recess)1: recess
본 고안은 브라운관의 전자총에 관한 것으로, 특히 제1전극에 관한 것이다.The present invention relates to an electron gun of a CRT, and more particularly to a first electrode.
주지하다시피 브라운관은 전자총에서 발사된 전자빔(electron beam)을 편향(deflection)시켜 형광면을 선택적으로 발광시킴으로써 화상을 표시하는 장치이다.As is well known, a CRT is a device for displaying an image by deflecting an electron beam emitted from an electron gun and selectively emitting a fluorescent surface.
이러한 전자빔은 캐소드(cathode)에서 발생시킨 열전자(thermion)을 집속(集束)및 가속(加速)시켜 형성하는 바, 제1도에 도시된 바와 같이 캐소드(K)는 히이터(heater;H)가 수납된 슬리이브(sleeve;S)의 선단에 전자방출체(E)를 구비하여 구성하고, 그 상부에 복수의 전극(G1, G2)들이 순차적으로 배열된다.The electron beam is formed by focusing and accelerating hot electrons generated at the cathode. As shown in FIG. 1, the cathode K contains a heater H. The electron emitting body E is provided at the tip of the sleeve S, and a plurality of electrodes G1 and G2 are sequentially arranged thereon.
열전자는 히이터(H)가 전자방출체(E)를 가열함으로써 발생되는 바, 히이터(H) 전압을 차단하더라도 가열된 전자방출체(E)에서는 계속 열전자가 방출되므로 캐소드(K)에 인접된 제1전극(G1)은 양전압의 선택적 인가로 열전자의 통과를 제어하는 제어전극 역할을 담당한다. 제2전극(G2) 이후의 전극들은 제1전극(G1)의 제어구멍(0)을 통과한 열전자로 전자빔을 형성하여 접속 및 가속하는 역할을 한다.The hot electrons are generated when the heater H heats the electron emitter E. Since the hot electrons are continuously emitted from the heated electron emitter E even when the heater H cuts off the voltage of the heater H, the hot electrons are generated in the vicinity of the cathode K. One electrode (G1) serves as a control electrode for controlling the passage of hot electrons by the selective application of a positive voltage. The electrodes after the second electrode G2 form an electron beam with hot electrons passing through the control hole 0 of the first electrode G1 to connect and accelerate the electron beam.
그런데 제어전극이 되는 제1전극(G1)은 제어구멍(H)도 수분의 1㎜로 매우 미소할뿐아니라 캐소드(K)와 100㎛ 내외로 매우 근접하게 되므로 히이터(H)의 가열시 전자방출체(H)의 복사열로 함께 가열되므로 열변형이 매우 심각하다.However, the first electrode G1 serving as the control electrode is not only very small with 1 mm of moisture, but also very close to the cathode K within about 100 μm, and thus emits electrons when the heater H is heated. Heat deformation is very serious because it is heated together by the radiant heat of the sieve (H).
이에 따라 제1전극(G1)을 겹판으로 구성하거나 제어구멍(O)의 주위에 리브(rib)를 형성하는등 여러가지 보강대책이 사용되고 있으나, 그럼에도 불구하고 제1전극(G1)은 캐소드(K)의 작동시 점선과 같이 10㎛ 이상 크게 열변형되고 제어구멍(H)도 확장되어 전자빔의 제어특성이 크게 변화하게 된다.Accordingly, various reinforcement measures are used, such as forming the first electrode G1 in a stack or forming ribs around the control hole O. Nevertheless, the first electrode G1 is the cathode K. During the operation, the thermal deformation is largely 10 µm or more, as in the dotted line, and the control hole H is also expanded to greatly change the control characteristics of the electron beam.
본 고안은 이와 같은 제1전극의 열변형을 방지할 목적으로 인출된 것으로, 제어구멍의 주위를 캐소드를 향해 깔때기 형태로 성형한 인입부를 구비하는 것을 특징으로 한다.The present invention is drawn out for the purpose of preventing such thermal deformation of the first electrode, characterized in that it comprises an inlet formed in the form of a funnel toward the cathode around the control hole.
즉 본 고안에 의한 제1전극(G1)은 제2동에 도시된 바와 같이 제어구멍(O)의 둘레에 캐소드(K)를 향하여 깔때기 형태로 성형된 인입부(1)가 형성되어 있다.That is, in the first electrode G1 according to the present invention, as shown in the second cavity, the inlet portion 1 formed in the shape of a funnel toward the cathode K is formed around the control hole O.
이러한 구성에 의하면 제어구멍(O) 주위의 강성이 크게 증가되어 캐소드(K)의 가열시 열변형이 억제될 뿐아니라 제3도에 도시된 바와 같이 인입부(1)가 점선으로 표시된 열변형 방향의 반대방향인 캐소드(K)를 향해 미리 성형되어 있으므로 열변형이 발생되어도 인입부(1)에 의해 열변형이 보상된다.According to this configuration, the stiffness around the control hole O is greatly increased to suppress thermal deformation during heating of the cathode K, as well as the heat deformation direction in which the inlet 1 is indicated by a dotted line as shown in FIG. Since it is preformed toward the cathode K in the opposite direction of, the thermal deformation is compensated by the inlet 1 even if thermal deformation occurs.
뿐만아니라 인입부(1)가 점선과 같이 상방으로 변형하면 제어구멍(O)은 오무라드는 경향을 가지므로 열팽창에 의한 제어구멍(H)의 확장도 보상된다.In addition, when the inlet portion 1 deforms upwards as shown by the dotted line, the control hole O tends to retract, so that expansion of the control hole H due to thermal expansion is also compensated.
즉 본 고안은 제1전극(G1)의 열변형과 이에 따른 제어구멍(O)의 확장을 이입부(1)의 기하학적인 형태에 의해 캐소드(K)의 작동시 보상되도록 미리 설정해둠으로써 열변형에 의한 제어특성의 변화를 방지하는 것이다.That is, according to the present invention, the thermal deformation of the first electrode G1 and the expansion of the control hole O are set in advance so as to be compensated during the operation of the cathode K by the geometrical shape of the insertion part 1. This is to prevent the change of control characteristics by
예를들어 전술한 바와 같이 10㎛ 정도의 열변형을 보이는 캐소드(K)와의 간격 100㎛의 제1전극(G1)은, 본 고안 적용의 경우 인입부(1)의 깊이를 약 50㎛로 할때 이 간격 100㎛와 인입부(1)의 깊이 50㎛를 더한 150㎛에서 열변형을 감한 가격으로 캐소드(K)에 대해 설치된다.For example, as described above, the first electrode G1 having a distance of 100 μm from the cathode K exhibiting about 10 μm of thermal deformation has a depth of about 50 μm in the case of the application of the present invention. At this time, the gap K is provided with respect to the cathode K at a price obtained by subtracting the heat deformation from 150 µm plus 100 µm of the gap and 50 µm of the depth of the inlet 1.
예를들어 본 고안의 인입부(1) 구성에 의해 발생되는 열변형량이 5㎛로 감소된다면 제1전극(G1)과 캐소드(K)간의 간격은 95+5=100㎛가 되어, 정확히 설계된 기준간격에 대응하게 되는 것이다.For example, if the amount of heat deformation generated by the configuration of the inlet part 1 of the present invention is reduced to 5 μm, the distance between the first electrode G1 and the cathode K becomes 95 + 5 = 100 μm, so that the precisely designed standard It will correspond to the interval.
이와 같이 본 고안에 의하면 제1전극의 열변형이 억제 및 보상되어 제어특성이 변화되지 않고 안정된 전자총이 제공된다.As described above, according to the present invention, thermal deformation of the first electrode is suppressed and compensated to provide a stable electron gun without changing control characteristics.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960017706U KR200162822Y1 (en) | 1996-06-27 | 1996-06-27 | Cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960017706U KR200162822Y1 (en) | 1996-06-27 | 1996-06-27 | Cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR980005257U KR980005257U (en) | 1998-03-30 |
| KR200162822Y1 true KR200162822Y1 (en) | 1999-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960017706U Expired - Fee Related KR200162822Y1 (en) | 1996-06-27 | 1996-06-27 | Cathode ray tube |
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|---|---|
| KR (1) | KR200162822Y1 (en) |
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1996
- 1996-06-27 KR KR2019960017706U patent/KR200162822Y1/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| KR980005257U (en) | 1998-03-30 |
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