KR920008504Y1 - Indirect type cathode structure - Google Patents

Indirect type cathode structure Download PDF

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Publication number
KR920008504Y1
KR920008504Y1 KR2019900016928U KR900016928U KR920008504Y1 KR 920008504 Y1 KR920008504 Y1 KR 920008504Y1 KR 2019900016928 U KR2019900016928 U KR 2019900016928U KR 900016928 U KR900016928 U KR 900016928U KR 920008504 Y1 KR920008504 Y1 KR 920008504Y1
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South Korea
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sleeve
heat
heater
cathode structure
absorbing film
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KR2019900016928U
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Korean (ko)
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KR920010292U (en
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도한신
김석기
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/20Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

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  • Solid Thermionic Cathode (AREA)

Abstract

내용 없음.No content.

Description

방열형 음극 구조체Heat dissipation cathode structure

제1도는 종래 방열형 음극구조체의 압단면도, 제2도는 본 고안에 따른 방열형 음극구조체의 입단면도.1 is a compression sectional view of a conventional heat radiation type negative electrode structure, Figure 2 is a cross-sectional view of the heat radiation type negative electrode structure according to the present invention.

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

11 : 베이스메탈 12 : 슬리이브11: base metal 12: sleeve

13 : 히이터 14 : 홀더13: heater 14: holder

본 고안은 음극구조체에 관한 것으로서, 더 상세하게는 수상관, 촬상관등과 같은 음극선관의 전자총에 사용되는 방열형 음극구조체에 관한 것이다.The present invention relates to a cathode structure, and more particularly to a heat radiation type cathode structure used in the electron gun of the cathode ray tube, such as the receiving tube, image pickup tube and the like.

통상적으로 음극구조체는 직열형 음극과 방열형 음극으로 대별된다. 상기 직열형 음극구조체는 지지체에 지지되는 필라멘트에 전자방사 물질이 도포되어 된 것으로 그 구조가 매우 간단하여 뷰파인더와 같은 초소형 음극선관에 사용되며, 상기 방열형 음극구조체는 제1도에 도시된 바와같이 전자방사물질(1a)이 도포된 베이스메탈(1)과, 상기 베이스메탈(1)을 하부에서 지지하며 내부에 히이터(2a)가 내장된 슬리이브(2)와, 슬리이브(2)를 지지하는 홀더(3)를 구비하여 구성되는데, 상기 슬리이브(2)의 내주면 및 베이스메탈(1)의 내면에는 고융점금속 또는 고융점금속의 산화물분말 및 무기질 결합제를 함유한 열 흡수성막(2b)이 형성되어 있다.Typically, the negative electrode structure is roughly divided into a direct type negative electrode and a heat dissipating negative electrode. The direct type cathode structure is an electron-spinning material coated on a filament supported by a support, and its structure is very simple, and is used in a micro cathode ray tube such as a viewfinder, and the heat dissipating cathode structure is shown in FIG. Supports the base metal (1) to which the electromagnetic radiation material (1a) is applied, the sleeve (2) having the heater (2a) built therein while supporting the base metal (1) from the bottom, and the sleeve (2) And a holder (3), wherein the inner circumferential surface of the sleeve (2) and the inner surface of the base metal (1) contain a high melting point metal or an oxide powder of a high melting point metal and a heat absorbing film (2b) containing an inorganic binder. Is formed.

이와 같이 구성된 종래의 상기 방열형 음극은 슬리이브(2) 및 베이스메탈(1)의 내면 전체에 열 흡수성 막(2b)이 형성되어 있으므로 히이터(2a)로부터 방출된 복사열이 슬리이브(2) 전체를 가열하게 되어 슬리이브(2)의 상부에 위치한 베이스메탈(1)을 짧은 시간내에 가열할 수 없는 문제점이 있었다.In the conventional heat dissipating cathode configured as described above, since the heat absorbing film 2b is formed on the entire inner surface of the sleeve 2 and the base metal 1, the radiant heat emitted from the heater 2a causes the whole of the sleeve 2 to be removed. There was a problem that the base metal 1 located on the upper portion of the sleeve 2 cannot be heated in a short time.

즉, 히이터(2a)로부터 방출된 열중 슬리이브(2)로 열전달되는 열량이 많아 베이스메탈(1)이 짧은 시간내에 가열되지 못하게 되어 이에 도포된 열전자 방출물질로 부터 열전자를 짧은 시간내에 방출할 수 없게 되는 것이다. 따라서 히이터(2a)에 과부하가 걸리게 되어 그 수명이 단축되게 되며, 이를 채용한 음극선관의 화면출화시간이 길어지게 되는 문제점이 있었다.That is, the amount of heat transferred to the sleeve 2 of the heat emitted from the heater 2a prevents the base metal 1 from being heated in a short time, so that hot electrons can be released from the hot electron emitting material applied thereto in a short time. There will be no. Therefore, the heater 2a is overloaded and its life is shortened, and the screen firing time of the cathode ray tube employing the same becomes long.

본 고안은 상기 문제점을 해결하기 위해 안출된 것으로서, 슬리이브에 내장된 히이터로부터 발생된 열이 슬리이브의 상단부 및 전자방사물질이 도포된 베이스메탈이 용이하게 전달될 수 있도록하여 열전자 방출특성을 향상시킨 방열형 음극구조체를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, the heat generated from the heater built in the sleeve to facilitate the transfer of the base metal coated with the upper end of the sleeve and the electron-emitting material to improve the hot electron emission characteristics The purpose is to provide a heat dissipating cathode structure.

상기 목적을 달성하기 위하여 본 고안은 그 내주면에 열흡수성막이 형성되며 내부에 히이터가 내장된 슬리이브를 구비하여된 방열형 음극구조체에 있어서, 상기 슬리이브 내주면의 열흡수성막이 슬리이브의 상단부로부터 히이터가 코일링된 부분의 하단부와 상응하는 곳까지 형성된 것을 그 특징으로 한다.In order to achieve the above object, the present invention is a heat-absorption cathode structure in which a heat absorbing film is formed on an inner circumferential surface thereof and includes a sleeve having a heater therein, wherein the heat absorbing film on the inner circumferential surface of the sleeve is formed from an upper end of the sleeve. It is characterized in that the heater is formed to correspond to the lower end of the coiled portion.

이하 첨부된 도면을 참조하여 본 고안에 따른 한 바람직한 실시에를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

제2도에 나타내 보인 본 고안에 따른 방열형 음극 구조체(10)는 전자방사물질(11a)이 도포된 베이스메탈(11)을 그 하부에서 슬리이브(12)가 지지하며, 상기 슬리이브(12)의 내부에는 히이터(13)가 내장됨과 아울러 그 내주면에는 열흡수성막(12a)이 도포되어 된 것이다.In the heat radiation type negative electrode structure 10 according to the present invention shown in FIG. 2, the sleeve 12 supports the base metal 11 to which the electromagnetic radiation material 11a is applied, and the sleeve 12 is supported by the sleeve 12. Heater 13 is built in the inside of the heat-absorbing film 12a is applied to the inner peripheral surface thereof.

여기서 상기 열흡수성막(12a)은 본 고안의 특징에 따라 상기 슬리이브(12)의 상단부로부터 상기 히이터(13a)가 코일링된 부분의 하단부(13b)와 상응하는 곳까지 도포되어 있다. 여기서 히이터(13)의 코일링된 부분의 기이를 C라하고 슬리이브 내주면에 도포된 열흡수성막의 길이를 B라할때 B/C는 0.7보다 크거나 같고 1.3보다 작거나 같도록 함이 바람직하다(0.7B/C1.3). 그리고 상기 슬리이브(12)의 내주면에 도포된 열흡수성막(12a)의 제작은 평균입자경이 5㎛이 텅스텐분말과 대략 동입자경을 가지는 소결알루미나로 되어 있는 무기질 결합재분마리을 중량비가 8대 2정도로 혼합하고 이 혼합물을 MIBK(Methyl Isobuthyl Kletone)에 혼합한 후 이에 석화선을 혼합하여 100시간정도 볼밀하여 제작함이 바람직하다.In this case, the heat absorption film 12a is applied from the upper end of the sleeve 12 to a position corresponding to the lower end 13b of the coiled portion of the heater 12a according to the feature of the present invention. Here, when the difference between the coiled portion of the heater 13 is C and the length of the heat-absorbing film applied to the inner circumferential surface of the sleeve is B, it is preferable that B / C is larger than or equal to 0.7 and smaller than or equal to 1.3. (0.7 B / C 1.3). The heat-absorbing film 12a coated on the inner circumferential surface of the sleeve 12 is made of an inorganic binder powder composed of sintered alumina having an average particle diameter of 5 µm and a tungsten powder having approximately the same particle size. After mixing, the mixture is mixed with MIBK (Methyl Isobuthyl Kletone), and then, it is preferable to produce a ball mill for about 100 hours by mixing the petrification line.

이와같이 구성된 본 고안에 따른 방열형 음극구조체(10)는 열흡수성막(12a)이 슬리이브(12)의 내주면 상단부로부터 히이터(13)가 코일링된 하단부(13b)와 상응하는 곳까지 도포되어 있으므로 히이터(13)로 부터 발생된 열이 상기 슬리이브(12) 내주면 상부에 형성된 열흡수성막(12a)에 용이하게 열전달되게 된다.In the heat dissipating cathode structure 10 according to the present invention configured as described above, since the heat absorbing film 12a is applied from the upper end of the inner circumferential surface of the sleeve 12 to the place corresponding to the lower end 13b where the heater 13 is coiled, the heater Heat generated from 13 is easily transferred to the heat absorption film 12a formed on the inner circumferential surface of the sleeve 12.

본 원인의 실험에 의하면 슬리이브(12)의 내주면에 도포된 열흡수성막(12a)이 길이를 B라하고 상기 히이터의 코일링된 부분의 길이를 C라할때 B/C는 0.7보다 크거나 같이 1.3보다 작거나 같을 때에 최상의 상태를 얻을 수 있었다. 상기 B/C값이 0.7보다 작게되면 열흡수성막(12a)이 히이터코일링부분보다 매우 작게 되므로 흡수할 수가 없으며 1.3보다 큰 경우에는 히이터(13)로 부터 발생된 복사열의 손실이 매우커 전자방사물질을 짧은 시간내에 가열할 수가 없었다.According to the experiment of the cause, when the heat-absorbing film 12a coated on the inner circumferential surface of the sleeve 12 is B and the length of the coiled portion of the heater is C, B / C is greater than or equal to 0.7. The best state was obtained when it was less than or equal to 1.3. When the B / C value is smaller than 0.7, the heat absorbing film 12a is much smaller than the heater coiling part and cannot be absorbed. When the B / C value is larger than 1.3, the loss of radiant heat generated from the heater 13 is very large. Could not be heated in a short time.

따라서 상기 슬리이브(12)의 내주면에 소정길이의 열흡수성막(12a)을 형성함으로써 그 상부에 지지된 베이스메탈(11)을 용이하게 가열할 수 있어 전자방사물질로부터의 열전자방출이 짧은 시간내에 이루어질 수 있게 되며 나아가서는 이를 채용한 음극선관의 화면출화시간을 단축시킬 수 있는 이점이 있다.Therefore, by forming the heat-absorbing film 12a having a predetermined length on the inner circumferential surface of the sleeve 12, the base metal 11 supported thereon can be easily heated, so that the release of hot electrons from the electron-emitting material within a short time. It can be made and furthermore there is an advantage that can shorten the screen display time of the cathode ray tube employing this.

특히, 1000℃이상의 높은 온도에서 작동하는 디스펜서 음극구조체는 히이터의 부하를 줄일 수 있으므로 히이터의 용량을 줄일 수 있으며, 상기 음극구조체와 인접한 제어전극의 열변형을 방지할 수 있다.In particular, the dispenser cathode structure operating at a high temperature of 1000 ° C. or more can reduce the load of the heater, thereby reducing the capacity of the heater and preventing thermal deformation of the control electrode adjacent to the cathode structure.

이와같이 본 고안 방열형 음극구조체는 히이터가 내장된 슬리이브의 내주면에 소정길이의 열흡수성막을 형성할 수 있으므로 히이터로 부터 방출된 열의 손실을 대폭 줄일 수 있으며 나아가서는 이를 채용한 음극선관의 화면출화시간을 단축할 수 있는 이점이 있다.In this way, the heat dissipating cathode structure of the present invention can form a heat absorbing film having a predetermined length on the inner circumferential surface of the sleeve in which the heater is built, thereby greatly reducing the loss of heat emitted from the heater and further improving the screen firing time of the cathode ray tube employing the same. There is an advantage that can be shortened.

Claims (1)

코일링된 부분을 가지는 히이터와, 이 히이터가 내장되는 것으로 내주면에 열흡수성막이 형성된 슬리이브를 구비하여 된 방열형 음극구조체에 있어서, 상기 슬리이브(12)의 내주면에 형성된 열흡수성막(12a)길이을 B라 하고 상기 히이터(13)의 코일링부분의 길이를 C라 할 때에 B, C의 값이 식;0.7<B/C<1.3에 의해 설정된 것을 특징으로 하는 방열형 음극구조체.In the heat radiation type negative electrode structure having a heater having a coiled portion and a sleeve having a heat absorbing film formed on the inner circumferential surface of the heater, the heat absorbing film 12a formed on the inner circumferential surface of the sleeve 12. A heat radiation type negative electrode structure, characterized in that the length of B and the coiling portion of the heater (13) is C, wherein the values of B and C are set by the formula: 0.7 <B / C <1.3.
KR2019900016928U 1990-11-05 1990-11-05 Indirect type cathode structure KR920008504Y1 (en)

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