KR20020063955A - Device for removimg a noxious gas of electron gun in cathode ray tube - Google Patents

Device for removimg a noxious gas of electron gun in cathode ray tube Download PDF

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Publication number
KR20020063955A
KR20020063955A KR1020010004465A KR20010004465A KR20020063955A KR 20020063955 A KR20020063955 A KR 20020063955A KR 1020010004465 A KR1020010004465 A KR 1020010004465A KR 20010004465 A KR20010004465 A KR 20010004465A KR 20020063955 A KR20020063955 A KR 20020063955A
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South Korea
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cathode
ray tube
auxiliary
electron gun
cathode ray
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KR1020010004465A
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Korean (ko)
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이병주
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엘지전자주식회사
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Priority to KR1020010004465A priority Critical patent/KR20020063955A/en
Publication of KR20020063955A publication Critical patent/KR20020063955A/en

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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
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04Cathodes
    • 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
    • H01J29/485Construction of the gun or of parts thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00Details of cathode ray tubes or electron beam tubes
    • H01J2229/48Electron guns
    • H01J2229/4824Constructional arrangements of electrodes
    • H01J2229/4831Electrode supports

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  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE: An apparatus for removing a remaining harmful gas of an electron gun for cathode ray tube is provided to remove the remaining harmful gas from a cathode ray tube by improving a structure of a cathode part of the electron gun for cathode ray tube. CONSTITUTION: An electron gun for cathode ray tube has three cathodes(1) in order to emit electron beam. An auxiliary cathode(10) besides the cathodes(1) is used for emitting electrons. The auxiliary cathode(10) has an auxiliary cathode supporter(10b) having the same as a structure of the cathode(1) and a heater. The auxiliary cathode(10) is formed with a porous material in order to absorb the remaining harmful gas from a cathode ray tube. The auxiliary cathode(10) is operated independently since the auxiliary cathode(10) is not connected to the cathodes(1). The auxiliary cathode(10) emits the electrons by operating the heater.

Description

음극선관용 전자총의 잔류유해가스 제거장치{Device for removimg a noxious gas of electron gun in cathode ray tube}Device for removimg a noxious gas of electron gun in cathode ray tube}

본 발명은 음극선관용 전자총에 관한 것으로서, 더 상세하게는 음극선관용 전자총의 음극부 구조를 개선하여, 음극선관 내의 잔류유해가스를 제거할 수 있게 한 것이다.The present invention relates to an electron gun for a cathode ray tube, and more particularly, to improve the cathode structure of an electron gun for a cathode ray tube, so that residual harmful gas in the cathode ray tube can be removed.

일반적으로, 음극선관은, 전자빔을 발사, 제어, 가속, 집속하여, 패널 내면에 도포된 형광막을 발광시켜 화상이 재현되도록 한 것으로서, 영상을 디스플레이하는 기기에 널리 이용되고 있다.In general, a cathode ray tube emits, controls, accelerates and focuses an electron beam, emits a fluorescent film applied to an inner surface of a panel so that an image is reproduced, and is widely used in an apparatus for displaying an image.

한편, 음극선관용 전자총은, 도 1에 도시된 바와 같이, 전자빔인 R,G,B빔을 발사하는 음극(1)과, 상기 음극에서 발사된 전자빔을 제어하는 제1 전극(2)과, 상기 제1 전극에서 제어된 전자빔을 가속시키는 제2 전극(3)으로 이루어진 삼극부와; 상기 제2 전극(3)에서 가속된 전자빔이 화면에 집속되도록 단일 전극 또는 다수개의 전극이 중첩되어 렌즈를 형성시키는 제3 전극(4), 제4 전극(5), 제5 전극(6)과, 제6 전극(7)으로 이루어진 렌즈형성전극부가 순차적으로 배치되어 이루어진다.Meanwhile, as shown in FIG. 1, the cathode ray tube electron gun includes a cathode 1 for emitting R, G, and B beams as electron beams, a first electrode 2 for controlling an electron beam emitted from the cathode, and A triode consisting of a second electrode 3 for accelerating the controlled electron beam at the first electrode; A third electrode 4, a fourth electrode 5, and a fifth electrode 6 overlapping a single electrode or a plurality of electrodes to form a lens so that the electron beam accelerated by the second electrode 3 is focused on the screen; The lens forming electrode part including the sixth electrode 7 is sequentially disposed.

이 때, 음극(1)은 도 2에 도시된 바와 같이, 음극선관 내에서 전자를 생성/발사하는 핵심적인 역할을 하는 것으로서, 상기 음극을 비드글라스(8)에 지지하는 음극지지대(1a)와, 상기 음극에 열을 가하는 히터(1b)가 포함되어 이루어진다.In this case, as shown in FIG. 2, the cathode 1 plays a key role of generating / emitting electrons in the cathode ray tube, and includes a cathode support 1a supporting the cathode on the bead glass 8. And a heater 1b for applying heat to the cathode.

또한, 상기 음극(1)은 Ba을 주성분으로 하고 소량의 Sr, Ca등이 첨가된 소재로 이루어지며, 전자총에 삽입될 시에는 BaCO3등의 탄산염 형태로 있다가 CRT(Cathode Ray Tube)제조공정상에서의 에이징(Aging) 과정을 거쳐 Ba, Sr, Ca 등의 형태로 환원된다.In addition, the cathode 1 is made of a material containing Ba as a main component and a small amount of Sr, Ca, and the like, and when inserted into an electron gun, the cathode 1 is in the form of a carbonate such as BaCO 3, and then a CRT (Cathode Ray Tube) manufacturing process. It is reduced to the form of Ba, Sr, Ca, etc. through an aging process in the phase.

그리고, CRT의 음극과 관련된 후반 제조공정을 설명하면 다음과 같다.And, the second manufacturing process related to the cathode of the CRT is described as follows.

우선, 진공배기가 끝난 CRT는 팁오프(Tip Off) 과정을 통해 유리 진공 배기관(도시생략)이 봉합되어 밀봉되고, 게터 플래싱(Getter Flashing) 과정을 통해 Ba Getter를 CRT 내에 증착시켜 CRT 내 진공도를 좋게 한 후에 에이징 과정을 거쳐 음극(1a)이 활성화된다. 여기서, 음극(1)이 활성화된다는 것은 상술한 바와 같이 탄산염 형태의 BaCO3등을 열을 가해 분해시켜 BaO 등의 산화물 형태로 만들고, 이를 다시 열과 전계를 인가하여 Ba과 같은 형태로 만들어 전자방출을 용이하게 만드는 것을 말한다.First of all, the vacuum exhausted CRT is sealed by sealing the glass vacuum exhaust pipe (not shown) through the tip off process, and Ba Getter is deposited in the CRT through the getter flashing process to improve the vacuum degree in the CRT. After making it good, the cathode 1a is activated through an aging process. Here, as the cathode 1 is activated, as described above, BaCO 3 in the form of carbonate is decomposed by heat to form an oxide such as BaO, and again, by applying heat and an electric field to form Ba, such as electron emission. Say something that makes it easier.

이 후, 1차 검사를 통해 CRT화면을 처음으로 발광시키고 CRT의 불량여부를 검사하게 된다.After that, the CRT screen emits light for the first time through the first inspection and checks whether the CRT is defective.

하지만, 상기와 같은 종래기술은 다음과 같은 문제점을 안고 있다. 즉, 1차검사시 CRT화면을 발광시키기 위해서 필수적으로 히터(1b)에 전압을 가해 음극(1)에 적절한 열을 가하고(약 800℃) 전계를 인가하여, 음극에서는 최초로 전자를 형광막(도시생략)까지 발사하여 화상을 재현시키게 되는데, 이때, 음극은 다음과 같은 손상을 입게 된다.However, the prior art as described above has the following problems. That is, in order to make the CRT screen emit light during the first inspection, it is necessary to apply a voltage to the heater 1b, apply proper heat to the cathode 1 (approximately 800 ° C.), and apply an electric field, so that electrons are first emitted from the fluorescent film (not shown). (Reduced) to reproduce the image, in which case the cathode is damaged as follows.

첫째, CRT 내 잔류유해가스 중 메탄은 열과 전계에 의해서 아래와 같은 화학 반응식처럼 분해되는데, 이때, 뜨거운 금속표면에 탄소가 침착되어 음극(1) 중앙부에 흑점이 생기는 등 음극에 손상을 가하게 된다.First, methane in the residual harmful gas in the CRT is decomposed by heat and an electric field as shown in the following chemical reaction equation. At this time, carbon is deposited on a hot metal surface, which causes damage to the cathode such as black spots in the center of the cathode (1).

둘째, CRT 내 잔류가스 중 Ar은 전자방출에 의하여 이온화될 수 있고, 이렇게 이온화된 Ar+은 양이온이기 때문에 음극(1)을 향해 가속되어 음극과 강하게 충돌하는, 이른바 Ar 스퍼터링(Sputtering) 효과를 일으켜 음극표면을 손상시키게 된다. 이러한 Ar 스퍼터링 효과는 전통적인 산화물 음극에서는 큰 문제를 일으키지 않지만 표면상태에 극히 민감한 함침형 음극에는 큰 손상을 주는 것으로 알려져 있기 때문에 함침형 음극 개발시 Ar 스퍼터링 효과의 방지는 커다란 과제이다.Second, Ar in the residual gas in the CRT can be ionized by electron emission, and since this ionized Ar + is a cation, it accelerates toward the cathode 1 and strongly collides with the cathode, causing a so-called Ar sputtering effect. This will damage the surface of the cathode. The Ar sputtering effect does not cause a big problem in the conventional oxide cathode, but is known to cause a great damage to the impregnated cathode which is extremely sensitive to the surface state, it is a big problem to prevent the Ar sputtering effect in the development of the impregnated cathode.

본 발명은 종래기술에 대한 문제점을 해결하기 위한 것으로서, 음극선관용 전자총의 음극부 구조를 개선하여, 음극선관 내의 잔류유해가스를 제거하는데 그 목적이 있다.The present invention is to solve the problems of the prior art, and to improve the structure of the cathode portion of the cathode ray tube electron gun, the object is to remove the residual harmful gas in the cathode ray tube.

도 1은 일반적인 음극선관용 전자총의 구조를 나타낸 정면도.1 is a front view showing the structure of an electron gun for a typical cathode ray tube.

도 2는 종래기술에 따른 전자총의 음극부 구조를 나타낸 도 1의 Ⅰ-Ⅰ단면도.Figure 2 is a cross-sectional view of the I-I of Figure 1 showing the structure of the cathode portion of the electron gun according to the prior art.

도 3은 본 발명에 따른 전자총의 음극부 구조를 나타낸 도 1의 Ⅰ-Ⅰ단면도.3 is a cross-sectional view taken along line II of FIG. 1 showing the structure of a cathode part of an electron gun according to the present invention;

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

1: 음극 10: 보조음극1: cathode 10: auxiliary cathode

10a: 보조음극 지지대10a: auxiliary cathode support

상기 목적을 달성하기 위해서, 본 발명은 전자빔을 방출하는 3개의 음극을 갖는 음극선관용 전자총에 있어서, 상기 음극과 별도로 전자를 방출하여 음극선관 내의 잔류유해가스를 제거하도록 한 보조음극이 포함되어 이루어진 음극선관용 전자총을 제공한다.In order to achieve the above object, the present invention is a cathode ray tube electron gun having three cathodes for emitting an electron beam, the cathode ray comprising an auxiliary cathode to remove residual harmful gas in the cathode ray tube by emitting electrons separately from the cathode Provide a conventional gun.

상기한 내용을 더 상세하게 설명하기 위해 도면을 참조하면 다음과 같다.Referring to the drawings to describe the above in more detail as follows.

도면 설명에 앞서, 종래기술과 동일한 구조에 한해서는 종래와 동일한 부호를 부여키로 한다.Prior to the drawings, the same reference numerals as those in the prior art are assigned to the same structures as in the prior art.

도 3은 본 발명에 따른 전자총의 음극부 구조를 나타낸 도 1의 Ⅰ-Ⅰ단면도.3 is a cross-sectional view taken along line II of FIG. 1 showing the structure of a cathode part of an electron gun according to the present invention;

본 발명은 전자빔을 방출하는 3개의 음극(1)을 갖는 음극선관용 전자총에 있어서, 상기 음극(1)과 별도로 전자를 방출하여 음극선관 내의 잔류유해가스를 제거하도록 한 보조음극(10)이 포함되어 이루어진 음극선관용 전자총을 제공한다.The present invention provides a cathode ray tube electron gun having three cathodes (1) for emitting an electron beam, wherein the auxiliary cathode (10) for emitting electrons separately from the cathode (1) to remove residual harmful gas in the cathode ray tube is included. It provides an electron gun for a cathode ray tube made up.

이 때, 상기 보조음극(10)은, 상기 음극(1)과 동일한 구조인 보조음극 지지대(10b)와, 히터(도시생략)가 포함되어 이루어진다.At this time, the auxiliary cathode 10 includes an auxiliary cathode support 10b having the same structure as the cathode 1 and a heater (not shown).

그리고, 상기 보조음극(10)은, 음극선관 내 잔류유해가스가 흡착되도록 다공성재질로 이루어짐이 바람직하다.In addition, the auxiliary cathode 10 is preferably made of a porous material so that the residual harmful gas in the cathode ray tube is adsorbed.

또한, 상기 보조음극(10)은, 상기 음극(1)과 상호 전기적으로 연결되지 않은 독립 구조를 취하게 하여, 상기 보조음극의 히터와 상기 음극의 히터가 독립적으로 작동되도록 함이 바람직하다.In addition, the auxiliary cathode 10, it is preferable to take an independent structure that is not electrically connected with the cathode 1, so that the heater of the auxiliary cathode and the heater of the cathode is operated independently.

이하, 첨부된 도 3을 참조하여 본 발명에 따른 음극선관용 전자총의 동작 및 작용을 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying Figure 3 will be described in detail the operation and action of the electron gun for the cathode ray tube according to the present invention.

본 발명은 종래의 R,G,B 음극(1) 3개와 더불어 전자를 방출할 수 있는 보조음극(10) 1∼4개를 추가시킨 것으로서, 보조음극의 히터(도시생략)는 종래 음극(1)의 히터(1b)와 독립적으로 연결하고, 보조음극 자체도 종래 음극과는 별도로 전기적 연결을 하여, 1차 검사시 보조음극의 히터만 작동시켜 전자를 방출시킬 수 있도록 한 것이다.The present invention adds 1 to 4 auxiliary cathodes 10 capable of emitting electrons together with three conventional R, G and B cathodes 1, and the heater (not shown) of the auxiliary cathode is a conventional cathode (1). Independently connected to the heater (1b) of the), and the auxiliary cathode itself is also electrically connected to the conventional cathode, so that only the heater of the auxiliary cathode during the first inspection can emit electrons.

즉, 보조음극(10)만이 가열되어 보조음극으로부터 열전자가 방출되면, CRT 내 잔류가스 중 메탄과 같은 유해가스는 보조음극만을 손상시키면서 분해되어 사라지고, 보조음극에만 전계가 인가되므로, 스퍼터링(Sputtering)되어 이온화된 Ar+는 보조음극으로만 충돌하여 보조음극 표면을 손상시키면서 점차 보조음극으로 흡착된다. 따라서, CRT 후반 공정에서 에이징(Aging) 과정 직후 및 1차 검사 직전에 이러한 보조음극을 충분한 시간동안(약 30분) 작동시켜 전자를 방출시키면 CRT 내 잔류유해가스를 종래 음극의 손상 없이 효과적으로 제거할 수 있게 된다.That is, when only the auxiliary cathode 10 is heated and hot electrons are emitted from the auxiliary cathode, harmful gases such as methane in the residual gas in the CRT are decomposed and disappeared while damaging only the auxiliary cathode, and an electric field is applied only to the auxiliary cathode, so that sputtering is performed. As a result, ionized Ar + collides only with the auxiliary cathode and is gradually adsorbed into the auxiliary cathode while damaging the surface of the auxiliary cathode. Therefore, in the late CRT process, the auxiliary cathode is operated for a sufficient time (about 30 minutes) immediately after the aging process and immediately before the first inspection to release electrons, thereby effectively removing residual harmful gas in the CRT without damaging the conventional cathode. It becomes possible.

이 때, 보조음극(10)은 Ar+을 효과적으로 흡착할 수 있도록 표면을 요철형상으로 가공하거나 다공성재질로 이루어짐이 효과적이다. 그 이유는 Ar이 보조음극(10)과 충돌하여 보조음극 표면에 박혀서 제거될 때, 보조음극 표면에 박힌 Ar의 수가 어느 이상이 되면, 충돌하는 Ar 이온에 의해 이미 보조음극에 박혀 있던 Ar이 튕겨져 나갈 가능성이 높아지는데, 이때 보조음극(10)의 표면이 상기와 같이 요철형상 및 다공성재질로 되면 Ar 흡수효과가 높아져 Ar이 튕겨나가는 현상을 저감시킬 수 있기 때문이다.At this time, the auxiliary cathode 10 is effective in processing the surface into an uneven shape or made of a porous material to effectively adsorb Ar + . The reason for this is that when Ar collides with the auxiliary cathode 10 and is embedded in the surface of the auxiliary cathode, when the number of Ar embedded in the surface of the auxiliary cathode becomes more than a certain amount, Ar, which is already embedded in the auxiliary cathode, is bounced off by the colliding Ar ions. If the surface of the auxiliary cathode 10 is a concave-convex shape and a porous material as described above, Ar absorption effect is increased to reduce the phenomenon that Ar is thrown out.

또한, 상기 보조음극(10)은 자기 수명이 다할 때까지 계속 유해가스를 흡착시킬 수 있고, 종래 음극(1)과는 별도의 전극으로 연결되어 있으므로 제품화가 된 후에도 정기적, 혹은 비정기적으로 CRT 내 잔류유해가스를 분해 및 흡착시켜 제거할 수 있게 된다.In addition, the auxiliary cathode 10 may continue to adsorb harmful gases until the end of its life, and is connected to a separate electrode from the conventional cathode (1), so even after commercialization, or periodically in the CRT Residual harmful gas can be removed by decomposition and adsorption.

결국, 본 발명은 음극선관용 전자총의 음극부에 별도의 보조음극(10)을 채용함에 따라, 음극선관 내의 잔류유해가스를 제거시킬 수 있어, 화상을 재현하기 위해 전자빔을 발사시키는 종래의 음극(1)에 잔류유해가스가 흡착되지 않게 되어 이로 인해 발생되었던 음극(1)파손 문제를 막을 수 있게 된다.As a result, the present invention employs a separate auxiliary cathode 10 at the cathode portion of the cathode ray tube electron gun, which can remove residual harmful gas in the cathode ray tube, thereby firing an electron beam to reproduce an image. Residual harmful gas is not adsorbed in the c), thereby preventing the cathode (1) breakage problem caused by this.

이제까지 본 발명에 대하여 그 바람직한 실시예를 중심으로 살펴보았으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명의 본질적 기술 범위 내에서 상기 본 발명의 상세한 설명과 다른 형태의 실시예들을 구현할 수 있을 것이다. 여기서 본 발명의 본질적 기술 범위는 특허청구범위에 나타나 있다.So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Herein the essential technical scope of the present invention is shown in the claims.

이상에서와 같이, 본 발명은 음극선관용 전자총의 음극부에 별도의 보조음극을 채용한 것으로서, 다음과 같은 효과가 있다.As described above, the present invention employs a separate auxiliary cathode in the cathode portion of the cathode ray tube electron gun, and has the following effects.

첫째, CRT 후반 공정에서 에이징(Aging) 과정 직후 및 1차 검사 직전, 보조음극만을 충분한 시간동안 작동시켜 줌에 따라, 종래의 R,G,B 음극의 손상 없이 CRT 내 잔류유해가스가 제거되어, 음극의 손상을 미연에 막을 수 있다.First, in the late CRT process, only the auxiliary cathode is operated for a sufficient time immediately after the aging process and immediately before the first inspection, so that residual harmful gas in the CRT is removed without damaging the conventional R, G and B cathodes. Damage to the cathode can be prevented in advance.

즉, 보조음극이 작동되면, CRT 내 잔류유해가스의 양이 동반 감소하게 된다. 이에 따라, CRT 내 잔류유해가스로 인한 음극의 손상을 미연에 막을 수 있다.That is, when the auxiliary cathode is operated, the amount of residual harmful gas in the CRT is also reduced. Accordingly, damage to the cathode due to residual harmful gas in the CRT can be prevented in advance.

둘째, 종래의 전자총 구조를 크게 바꾸지 않고, 단지 종래의 R,G,B 음극 사이에 보조음극만을 추가한 구조이므로, 제작비용이 크게 요구되지 않는 효과가 있다.Secondly, since the structure of only the auxiliary cathode is added between the conventional R, G, and B cathodes without greatly changing the conventional electron gun structure, there is an effect that the manufacturing cost is not greatly required.

즉, 종래의 전자총을 이루는 다수개의 전극에 R,G,B빔이 통과되는 구멍외에 보조음극에서 방출될 전자들이 통과할 수 있도록 통과공만 적절히 뚫어주면 된다. 이때, 보조음극에서 방출된 전자는 형광막만 여기시켜 발광시키고 잔류유해가스를 제거하면 그 목적을 다하므로, 별도의 포커싱(Focusing)등 화면품질을 전혀 고려할 필요가 없고, 수명도 크게 중요하지 않기 때문에 종래의 전자총의 설계를 크게 변경시킬 필요가 없다. 이에 따라, 제작비용을 줄일 수 있다.That is, only a through hole may be appropriately drilled to allow electrons to be emitted from the auxiliary cathode to pass through a plurality of electrodes constituting the conventional electron gun, in addition to the holes through which the R, G, and B beams pass. At this time, the electrons emitted from the auxiliary cathode excite only the fluorescent film and emit light and remove the residual harmful gas. Therefore, the screen quality such as focusing does not need to be considered at all, and the lifetime is not important. Therefore, there is no need to greatly change the design of the conventional electron gun. Accordingly, the manufacturing cost can be reduced.

셋째, 보조음극의 히터와 종래 음극의 히터가 별도로 전기적 연결되어 모니터나 TV의 특별한 스위치와 연결되도록 함으로, 사용자가 원할 때 스위치를 켜면, 보조음극의 작동을 반복적으로 수행시킬 수 있는 효과가 있다.Third, the heater of the auxiliary cathode and the heater of the conventional cathode is separately connected to be connected to a special switch of the monitor or the TV, when the user turns on the switch, the user can repeatedly perform the operation of the auxiliary cathode.

즉, 종래 음극은 작동을 멈추고 보조음극만 작동시켜 다시 CRT 내 유해가스를 분해 또는 흡착하여 제거할 수 있는 효과가 있다.That is, the conventional cathode stops the operation and operates only the auxiliary cathode, so that harmful gases in the CRT can be decomposed or adsorbed and removed.

넷째, Ar은 불활성 가스이므로 CRT 내 가스 흡착 물질인 게터(Getter)로도 제거가 불가능한 가스인데, 보조음극으로 제거가 가능해져 차세대 열음극인 함침형 음극에 본 발명이 적용되면 커다란 효과를 얻을 수 있다.Fourth, Ar is an inert gas, which can not be removed even by a getter, which is a gas adsorption material in the CRT, and can be removed by an auxiliary cathode, and thus, when the present invention is applied to an impregnated cathode, which is a next-generation hot cathode, a great effect can be obtained.

다섯째, 보조음극의 작동으로 메탄도 같이 분해되므로, CRT 내 게터(Getter)수명을 연장시켜 줄 수 있다. 이에 따라 CRT 제조시 게터 비산량을 줄일 수 있기 때문에 휘도가 증가되는 효과가 있다.Fifth, since methane is also decomposed by the operation of the auxiliary cathode, the getter life in the CRT can be extended. Accordingly, since the getter scattering amount can be reduced during CRT manufacturing, the luminance is increased.

Claims (4)

전자빔을 방출하는 3개의 음극을 갖는 음극선관용 전자총에 있어서,An electron gun for a cathode ray tube having three cathodes emitting an electron beam, 상기 음극과 별도로 전자를 방출하여 음극선관 내의 잔류유해가스를 제거하도록 한 보조음극이 포함되어 이루어짐을 특징으로 하는 음극선관용 전자총.An electron gun for a cathode ray tube, characterized in that it comprises an auxiliary cathode for removing the residual harmful gas in the cathode ray tube by emitting electrons separately from the cathode. 제 1 항에 있어서,The method of claim 1, 상기 보조음극은;The auxiliary cathode is; 상기 음극과 동일한 구조인 보조음극 지지대와, 히터가 포함되어 이루어짐을 특징으로 하는 음극선관용 전자총.An electron gun for a cathode ray tube, characterized in that the auxiliary cathode support and the heater having the same structure as the cathode is made. 제 1 항에 있어서,The method of claim 1, 상기 보조음극은;The auxiliary cathode is; 음극선관 내 잔류유해가스가 흡착되도록 다공성재질로 이루어짐을 특징으로 하는 음극선관용 전자총.Electron gun for cathode ray tube, characterized in that made of a porous material to adsorb the residual harmful gas in the cathode ray tube. 제 1 항에 있어서,The method of claim 1, 상기 보조음극은;The auxiliary cathode is; 상기 음극과 상호 전기적으로 연결되지 않은 독립 구조를 취하게 하여, 상기 보조음극의 히터와 상기 음극의 히터가 독립적으로 작동되도록 함을 특징으로 하는음극선관용 전자총.Electron gun for a cathode ray tube, characterized in that to take an independent structure that is not electrically connected with the cathode, so that the heater of the auxiliary cathode and the heater of the cathode is operated independently.
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WO2011081430A2 (en) 2009-12-30 2011-07-07 주식회사 삼양사 Polymer nanoparticle injection formulation composition containing rapamycin with improved water solubility, preparation method thereof, and anticancer composition for combined use with radiotherapy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011081430A2 (en) 2009-12-30 2011-07-07 주식회사 삼양사 Polymer nanoparticle injection formulation composition containing rapamycin with improved water solubility, preparation method thereof, and anticancer composition for combined use with radiotherapy

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