KR20000009007A - Cathode structure body for cathode-ray tube - Google Patents

Cathode structure body for cathode-ray tube Download PDF

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Publication number
KR20000009007A
KR20000009007A KR1019980029146A KR19980029146A KR20000009007A KR 20000009007 A KR20000009007 A KR 20000009007A KR 1019980029146 A KR1019980029146 A KR 1019980029146A KR 19980029146 A KR19980029146 A KR 19980029146A KR 20000009007 A KR20000009007 A KR 20000009007A
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South Korea
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cathode
holder
base metal
current
sleeve
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KR1019980029146A
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Korean (ko)
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KR100504460B1 (en
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김태근
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구자홍
엘지전자 주식회사
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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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04—Cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details 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
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/24—Insulating layer or body located between heater and emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes

Abstract

PURPOSE: A cathode structure body for a cathode-ray tube is provided to improve a current characteristic to be stable. CONSTITUTION: In the cathode structure body, a cathode heating heater(1) is inserted into a cathode sleeve(2). A base metal(3) and a electron emission material layer(4) are installed on the cathode sleeve(2). An outside lower edge of the cathode sleeve(2) and upper face of a holder(6') are connected together by a strap of ribbon form. A distance(A1) between upper face of the holder(6') and upper face of the base metal(3) is between 1.0 and 1.6 millimeter(mm). A cathode current in an initial display time is reduced according to long distance between upper face of the holder(6') and upper face of the base metal(3). Heating performance is improved according to large exposed area of the base metal(3) and cathode sleeve(2) from the holder(6'), so that current characteristic is stable with time.

Description

음극선관용 음극구조체Cathode Structure for Cathode Ray Tube

본 발명은 음극선관용 음극구조체에 관한 것으로, 특히 홀더 상면에서 기체금속의 상면까지의 길이를 길게 함으로서 화면초기 동작이 음극전류를 작게 하도록 하고 열처리 효과를 높여 시간이 지남에 따라 안정된 전류 특성을 가지게 하는데 적합한 음극구조체에 관한 것이다.The present invention relates to a cathode structure for a cathode ray tube, in particular, by increasing the length from the upper surface of the holder to the upper surface of the base metal to reduce the cathode current and increase the heat treatment effect to have a stable current characteristics over time It relates to a suitable cathode structure.

종래의 음극선관용 음극구조체는 도 1에 도시한 바와 같이, 음극가열용 히터(1)가 삽입 설치된 원통형 슬리브(2) 상단에 니켈(Ni)이 주성분이고 마그네슘(Mg), 실리콘(Si) 등의 활성화 금속이 미량함유된 기체금속(3)이 삽입 고정되고 기체금속(3)상면에 적어도 산화바륨(BaO)이 포함된 알카리토류 금속산화물 전자방사물질층(4)이 구비된다.As shown in FIG. 1, the cathode structure for a conventional cathode ray tube includes nickel (Ni) as a main component, and magnesium (Mg), silicon (Si), and the like on the top of a cylindrical sleeve 2 in which a cathode heating heater 1 is inserted. A base metal oxide electrospinning material layer 4 containing at least barium oxide (BaO) is inserted and fixed to the base metal 3 containing a small amount of the activating metal.

그리고 원통형 슬리브(2)의 하단에는 리본타입(Ribbon type)의 스트랩(Strap)(5)이 연결되고 스트랩의 타단은 홀더(6)의 상단에 용접되며, 상기 음극을 지지하기 위해 홀더 주위에는 도면이 생략된 아일렛(Eyelet)이 용접되어 위치한다.A ribbon type strap 5 is connected to the lower end of the cylindrical sleeve 2, and the other end of the strap is welded to the top of the holder 6, and around the holder to support the cathode. This omitted eyelet is located by welding.

도 2는 상기 음극(K)이 구비된 전자층의 개략단면도를 나타낸 것으로, 상기 음극(K)과 제어전극(10), 가속전극(20), 집속전극(30), 양극(40)으로 구성된다.FIG. 2 is a schematic cross-sectional view of an electronic layer provided with the cathode K, and includes the cathode K, the control electrode 10, the acceleration electrode 20, the focusing electrode 30, and the anode 40. do.

이와 같은 음극선관용 구조체를 제조함에 있어서는 먼저 알카리토류 금속탄산염 현탁액을 기체금속(3)상에 도포하고 진공배기 공정 중에서 히터(1)에 의해 가열하면 알카리토류 금속탄산염은 알카리 금속산화물로 변한다.In producing such a cathode ray tube structure, the alkali earth metal carbonate suspension is first applied onto the base metal 3 and heated by the heater 1 in the vacuum exhaust process to convert the alkaline earth metal carbonate into an alkali metal oxide.

그 다음 열활성화 공정에서 알카리토류 금속산화물의 일부를 환원시켜 반도체 성질을 갖도록 활성화하고, 이로 인해 알카리토류 금속산화물로된 전자방사물질층(4)이 기체금속(3)상에 형성된다.In the thermal activation process, a portion of the alkaline earth metal oxide is then reduced to be activated to have semiconductor properties, whereby an electron-emitting material layer 4 made of alkaline earth metal oxide is formed on the base metal 3.

상기 활성화 열처리는 음극의 각 부품(슬리브, 홀더, 기체금속)으로부터 가스방출 및 응력을 제거하여 온도변화에 따른 부품변형을 줄일 수 있고 부품을 깨끗하게 하여 주기 때문에 전자방사물질이 안정되게 전자를 방출하는 것이 가능하다.The activation heat treatment can remove the gas discharge and stress from each component (sleeve, holder, gas metal) of the cathode to reduce component deformation due to temperature changes and to clean the components, so that the electron-emitting material stably emits electrons It is possible.

상기 활성화 공정에 있어서 기체금속(3)중에 포함된 실리콘 또는 마그네슘과 같은 환원성 원소는 확산에 의하여 알카리토류 금속산화물층과 기체금속(3)간의 계면으로 이동하여 알카리토류 금속산화물과 화학반응을 한다.In the activation process, a reducing element such as silicon or magnesium contained in the base metal 3 moves to the interface between the alkaline earth metal oxide layer and the base metal 3 by diffusion to chemically react with the alkaline earth metal oxide.

이로 인해 전자반사물질층(4)은 알카리토류 금속산화물의 일부가 환원된 산소결핍형의 반도체가 되며 700∼800℃의 정상조건하에서 방출 전류를 얻게 된다.As a result, the electron reflecting material layer 4 becomes an oxygen-deficient semiconductor in which a portion of the alkaline earth metal oxide is reduced and obtains an emission current under normal conditions of 700 to 800 ° C.

이와 같은 전자생성에 있어서 대표물질로써 화학적인 기호로 반응식을 살펴보면 다음과 같다.Looking at the reaction formula as a chemical symbol as a representative material in the generation of electrons as follows.

종래의 음극선관용 음극구조체에 있어서 알카리토류 금속복합 산화물의 전자방사물질(4)은 기체금속(3)내의 활성화 금속과 화학반응하여 자유바륨(Ba)이 주성분인 알카리토류금속 자유원자로 생성되고 알카리토류금속 자유원자로부터 열전자가 생성된다.In the cathode structure for a conventional cathode ray tube, the electron-emitting material 4 of the alkaline earth metal complex oxide is chemically reacted with an activating metal in the base metal 3 to generate an alkaline earth metal free atom containing free barium (Ba) as an alkali Hot electrons are generated from free metal atoms.

이와 같이 음극선관 내에서의 음극구조체의 전자방사물질(4)로 부터의 열전자는 히터(1)의 열을 받아 동작중 계속 생성 방출되며 동작에 필요한 음극의 온도인 700∼800℃로 동작중에 전자방사물질층(4)은 열에 의해 증발되고 전자방사물질층(4)은 고갈되어 음극전류의 열화를 가져오게 된다.As described above, the hot electrons from the electron-emitting material 4 of the cathode structure in the cathode ray tube continue to be generated and released during operation by receiving the heat of the heater 1, The emissive material layer 4 is evaporated by heat and the electron emissive material layer 4 is depleted, resulting in deterioration of the cathode current.

전자총의 작동초기에 히터(1) 열에 의해 음극의 슬리브(2)가 제어전극(10)쪽으로 순간적으로 팽창되어 음극(기체금속 상면의 전자방사물질)과 제어전극(10)이 급격하게 가까워져 음극에서 전자가 과다하게 방출되는 과도현상을 Overshoot 현상이라 한다.At the beginning of the operation of the electron gun, the sleeve 2 of the cathode is instantaneously expanded toward the control electrode 10 by the heat of the heater 1 so that the cathode (electromagnetic material on the upper surface of the gas metal) and the control electrode 10 rapidly approach each other. The transient phenomenon in which an electron is excessively released is called an overshoot phenomenon.

종래의 음극구조에 있어서 전자총이 작동되면 히터(1)에 전원이 들어가고 히터의 열이 발생하여 음극슬리브(2)의 팽창에 의하여 기체금속(3) 및 전자방사물질(4)이 제어전극(10)방향으로 순간적으로 팽창하여 전류가 과다하게 방출되어지고 전류가 지남에 따라 올라갔다가 다시 30초 정도 경과하게 되면 다시 내려가게 되는 것이 일반적인 현상이며 종래의 음극구조는 홀더(6)의 상면에서 기체금속(3)의 상면까지의 거리(L1)가 0.8㎜로 구성되어져 있다.In the conventional cathode structure, when the electron gun is operated, power is supplied to the heater 1 and heat of the heater is generated, thereby expanding the cathode metal sleeve 2 so that the gas metal 3 and the electron emitting material 4 are controlled by the control electrode 10. It is a common phenomenon that the current expands momentarily in the direction of) and the current is excessively discharged, and as the current goes up, and then again passes for about 30 seconds, the current is lowered again. The conventional cathode structure is a gas metal on the upper surface of the holder 6. The distance L 1 to the upper surface of (3) is configured to 0.8 mm.

그리고 음극이 리본의 스트랩 구조로 되어 있어 스트랩(5)의 변형 방향이 슬리브(2) 및 기체금속(3)의 변형 방향에 역 방향으로 작용함으로써 음극(K)과 제어전극(10)의 간격 변화량(팽창량)이 감소한다.In addition, since the cathode has a ribbon strap structure, the deformation direction of the strap 5 acts in the opposite direction to the deformation direction of the sleeve 2 and the base metal 3 so that the gap change amount between the cathode K and the control electrode 10 is changed. (Expansion amount) decreases.

3-Piece 음극에 비해 변화량(팽창량)이 ⅓정도밖에 되지 않는다.Compared to the 3-Piece cathode, the amount of change (expansion) is only about ⅓.

상기와 같이 초기 동작시 음극전류가 순간적으로 올라갔다가 내려와 안정되는 현상이 일반적으로 바람직한 특성이지만, 초기 동작시 음극전류 변화율이 초기 대비 120∼130%가 가장 적당하다.As described above, the phenomenon in which the cathode current rises and descends momentarily during the initial operation is generally desirable, but the change rate of the cathode current during the initial operation is most suitable 120 to 130% compared to the initial state.

그러나 종래 음극구조체는 홀더(6) 상면에서 기체금속(3) 상면까지의 거리(L1)가 약 0.8㎜ 정도로 짧아 전원이 온(ON)되면 도 3과 같이 초기에 과다하게 높은 전류값(150% 이상)을 가지기 때문에 초기화면 동작시 순간적으로 화면이 너무 밝게 되고, 시간이 경과함에 따라 안정된 전류값을 가지지 못하는 문제점이 있었다.However, in the conventional cathode structure, when the distance L 1 from the upper surface of the holder 6 to the upper surface of the base metal 3 is about 0.8 mm, when the power is turned on, an excessively high current value is initially shown as shown in FIG. 3. Since the screen is too bright during the initial screen operation, there is a problem that can not have a stable current value over time.

또한 홀더(6)상면과 기체금속(3)과의 짧은 거리 상태에서 슬리브(2)가 홀더(6) 내부에 존재함으로 인해 음극의 열처리시 슬리브(2) 및 기체금속(3)이 열처리가 잘되지 않아 열적으로 안정이 되지 않아 시간이 경화함에 따라 전류가 상승하는 문제점이 있었다.In addition, since the sleeve 2 is present inside the holder 6 in a short distance between the upper surface of the holder 6 and the base metal 3, the sleeve 2 and the base metal 3 are heat-treated well during the heat treatment of the cathode. There was a problem that the current rises as time is hardened because it is not thermally stable.

본 발명은 상기한 종래 음극구조체의 문제점을 개선하기 위한 것으로, 홀더 상면과 기체금속 상면과의 거리를 종래 보다 길게 함으로써 리본 형태의 스트랩 길이가 짧아져 스트랩의 변형 방향이 슬리브 및 기체금속의 변형방향에 역 방향으로 작용하는 힘이 감소하게 되어 기체금속 및 슬리브의 팽창량이 증가하여 제어전극과 음극과의 간격이 가까워지게 함과 함께 슬리브 및 기체금속의 열처리 효과를 좋게 하여 초기동작 및 시간의 지남에 따른 안정된 전류 특성을 갖는 음극구조체를 제공하고자 하는데 그 목적이 있다.The present invention is to improve the above problems of the conventional negative electrode structure, the longer the distance between the upper surface of the holder and the upper surface of the base metal than the conventional strap length of the ribbon is shortened so that the deformation direction of the strap and the deformation direction of the sleeve and base metal As the force acting in the reverse direction decreases, the amount of expansion of the gas metal and the sleeve increases, so that the gap between the control electrode and the cathode is close, and the heat treatment effect of the sleeve and the gas metal is improved, so that the initial operation and the passage of time The purpose is to provide a cathode structure having a stable current characteristics according to.

도 1은 기존 음극구조체에 대한 개략단면도1 is a schematic cross-sectional view of a conventional cathode structure

도 2는 전자총의 측단면도2 is a side cross-sectional view of an electron gun

도 3은 기존의 음극동작시 시간에 따른 음극전류 변화율을 나타낸 상태도Figure 3 is a state diagram showing the rate of change of the cathode current with time during the conventional cathode operation

도 4는 본 발명 음극구조체에 대한 개략 단면도Figure 4 is a schematic cross-sectional view of the anode structure of the present invention

도 5는 본 발명의 음극동작시 시간에 따른 음극전류 변화율을 나타낸 상태도5 is a state diagram showing the rate of change of the cathode current with time during the operation of the cathode of the present invention;

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

2 : 슬리브 3 : 기체금속2: sleeve 3: base metal

5': 스트랩 6': 홀더5 ': Strap 6': Holder

K : 음극K: cathode

상기한 목적을 달성하기 위한 본 발명은 음극가열용 히터가 삽입 설치된 슬리브 상단에 기체금속과 전자방사물질층이 구비되고, 슬리브 외측하단과 홀더 상부에 리본 형태의 스트랩(Strap)을 연결시켜 구비된 음극에 있어서, 홀더의 상면과 기체금속 상면과의 거리를 1.0∼1.6㎜가 되게 구성시킴으로서 전원 온(ON)시 초기 전류량을 낮추고, 열처리 효과를 높여 시간이 경과함에 따라 안정화된 전류 특성을 가지는 음극선관용 음극구조체로 구성된다.The present invention for achieving the above object is provided with a gas metal and an electron-emitting material layer on the top of the sleeve in which the heater for the cathode heating is inserted, and is provided by connecting a strap in the form of a ribbon (strap) on the bottom of the sleeve and the top of the holder In the cathode, the distance between the upper surface of the holder and the upper surface of the base metal is set to 1.0 to 1.6 mm to reduce the initial amount of current at power-on, to increase the heat treatment effect, and to stabilize the current with time. It consists of a conventional cathode structure.

도 4는 본 발명의 음극구조체에 대한 개략단면도를 나타낸 것으로, 본 발명의 도 4는 종래의 도 1 보다 리본형태의 스트랩(Stap)(5')길이가 짧고 홀더(6') 상면에서부터 기체금속(3) 상면 까지의 거리(A1)를 길게(1.0∼1.6㎜)하는데 차이점이 있고 그 외의 구조는 동일하다.Figure 4 is a schematic cross-sectional view of the cathode structure of the present invention, Figure 4 of the present invention is a ribbon-shaped strap (Stap) 5 'shorter than the conventional Figure 1 and the base metal from the holder 6' (3) There is a difference in making the distance A 1 to the upper surface long (1.0 to 1.6 mm), and the other structures are the same.

즉, 본 발명은 음극가열용 히터(1)가 삽입 설치된 음극슬리브(2) 상단에 니켈(Ni)이 주성분이고 마그네슘(Mg), 실리콘(Si) 등의 활성화 금속이 미량 함유된 기체금속(3)이 삽입 고정되고, 기체금속(3) 상면에 적어도 산화바륨(BaO)이 포함된 알카리토류 금속산화물의 전자방사물질층(4)이 구비되고, 슬리브(2)하단에는 리본타입의 스트랩(5')이 연결되고, 스트랩 타단에는 홀더(6')상면에서부터 기체금속(3)의 상면까지의 길이(A1)가 유지되도록 홀더상면이 연결된다.That is, the present invention is a base metal (Ni) as the main component on the top of the negative electrode sleeve (2) in which the heater for heating cathode (1) is inserted (3) containing a small amount of activated metal such as magnesium (Mg), silicon (Si) (3) ) Is inserted and fixed, and an electron-emitting material layer 4 of an alkaline earth metal oxide containing at least barium oxide (BaO) is provided on the upper surface of the base metal 3, and a ribbon-type strap 5 is provided below the sleeve 2. ') Is connected, and the other end of the strap is connected to the upper surface of the holder such that the length A 1 from the upper surface of the holder 6' to the upper surface of the base metal 3 is maintained.

본 발명은 홀더(6')의 상면과 기체금속(3) 상면의 거리(A1)를 1.0∼1.6㎜로 길게 구성함으로써 기체금속(3)과 슬리브(2)가 음극열처리시 수소분위기에 노출이 많아져 열처리 효과를 좋게 하여 전자방사물질층(4)에서 안정된 전자방사가 되도록 하는 것이 가능하고 시간이 지남에 따른 전류방출 특성이 안정화된다.According to the present invention, the distance A 1 between the upper surface of the holder 6 'and the upper surface of the base metal 3 is set to 1.0 to 1.6 mm so that the base metal 3 and the sleeve 2 are exposed to the hydrogen atmosphere during the cathodic heat treatment. This increases the heat treatment effect to enable stable electron emission in the electron-emitting material layer 4, and stabilizes the current emission characteristic over time.

도 4와 같이 홀더(6')의 상면과 기체금속(3) 상면의 거리(A1)를 0.8㎜보다 길게 할수록 스트랩(5')의 길이가 짧아지는데 스트랩(5')의 길이가 짧아질수록 스트랩(5')의 변형 방향이 슬리브(2) 및 기체금속(3)의 변형 방향에 역 방향으로 즉, 아래 방향으로 작용하는 힘이 감소하게 되어 기체금속(3) 및 슬리브(2)의 팽창량이 증가하여 제어전극(10)과 음극(K)의 간격이 가까워진다.As shown in FIG. 4, as the distance A 1 between the upper surface of the holder 6 'and the upper surface of the base metal 3 is longer than 0.8 mm, the length of the strap 5' becomes shorter, but the length of the strap 5 'becomes shorter. The deformation direction of the collecting strap 5 'is reverse to the deformation direction of the sleeve 2 and the base metal 3, that is, the force acting in the downward direction is reduced, so that the base metal 3 and the sleeve 2 As the amount of expansion increases, the distance between the control electrode 10 and the cathode K approaches.

제어전극(10)과 음극(K)의 간격이 가까워질수록 전원 온(ON)시 음극의 전류가 초기에 올라가는 량이 많아지고 Cathode Cut-Off 전압 즉 Ekco는 커진다.As the distance between the control electrode 10 and the cathode K becomes closer, the amount of the current of the cathode initially increases during power-on, and the Cathode Cut-Off voltage, that is, Ekco, increases.

그리고 시간이 지남에 따른 전류 방출 특성이 안정화된다.And over time, the current emission characteristics stabilize.

도 5에서와 같이 음극 전류변화율을 초기 30분 예열시 100%로 보았을 때 홀더(6')의 상면과 기체금속(3) 상면의 거리(A1)가 0.8㎜일 경우 전류변화율이 150%, A1= 1.0㎜일 경우 140%, A1= 1.2㎜일 경우 130%, A1= 1.4㎜일 경우 약 120%, A1= 1.6㎜일 경우 110%로 A1의 길이가 길어질수록 전원 온(ON)초기에 전류 변화율이 감소함을 알 수 있다.As shown in FIG. 5, the current change rate is 150% when the distance A 1 between the upper surface of the holder 6 'and the upper surface of the base metal 3 is 0.8 mm when the cathode current change rate is 100% during the initial 30 minutes preheating. a 1 = 140% when the 1.0㎜, a 1 = 1.2㎜ day when 130%, a 1 = 1.4㎜ one case about 120%, a 1 = 1.6㎜ one case the longer the length of the a 1 to 110% power on It can be seen that the rate of change of current decreases at the beginning of (ON).

전원 온(ON)하여 30분후 전류의 변화율이 종래에는 110∼115% 이던 것이 A1의 길이가 1.4㎜일 경우 105∼109%로 약 6% 정도 전류 변화율이 낮아지게 되어 결국 시간이 지남에 따른 전류의 안정 시간이 짧아지고 안정화된 전류특성을 얻을 수 있다.After 30 minutes of power-on, the change rate of the current was 110-115%. If the length of A 1 was 1.4 mm, the change rate of the current decreased by about 6% to 105-109%. The stabilization time of the current is shortened and a stable current characteristic can be obtained.

음극선관에서 전류의 변화에 따라 화면의 휘도가 변화함으로 인해 소비자가 칼라브라운관을 사용할 때 신뢰성의 문제가 발생함으로 음극에서의 안정된 전류방출 특성이 필수적이다.As the brightness of the screen changes with the change of current in the cathode ray tube, a reliability problem occurs when a consumer uses a color brown tube, so stable current emission characteristics at the cathode are essential.

홀더(6')의 상면과 기체금속(3)상면의 거리(A1)가 1.6㎜보다 커지면 스트랩(5')의 길이가 너무 짧아 작업성이 나빠지게 되고 슬리브(2)의 중심과 홀더(6')의 중심이 일치하지 않게 되어 전기적 특성이 나빠지게 된다.When the distance A 1 between the upper surface of the holder 6 'and the upper surface of the base metal 3 is larger than 1.6 mm, the length of the strap 5' is too short, resulting in poor workability and the center of the sleeve 2 and the holder ( 6 ') does not coincide with the center of the electrical properties will be worse.

이상에서와 같이 본 발명은 홀더(6')상면과 기체금속(3) 상면과의 거리 (A1)를 0.8㎜ 보다 길게 구성시킴으로써 전원 온(ON)시 초기 전류의 변화율이 가장 바람직한 120∼130%의 값으로 만드는 것이 가능하고 시간이 지남에 따라 전류의 안정시간이 짧아지고 안정화된 전류특성을 얻을 수 있고 홀더(6')로부터 기체금속(3)과 슬리브(2)가 음극 열처리시 노출이 많아져 열처리 효과가 높아 시간이 지남에 따른 안정화된 전류특성으로 화면에서의 휘도(밝기)변화를 제거함으로써 신뢰성 있는 칼라브라운관을 제공할 수 있다.As described above, the present invention configures the distance A 1 between the upper surface of the holder 6 'and the upper surface of the base metal 3 to be longer than 0.8 mm so that the rate of change of the initial current at the time of power-on is most preferably 120 to 130. It is possible to make the value of%, and as time passes, the stabilization time of the current is shortened and a stable current characteristic can be obtained, and the gaseous metal 3 and the sleeve 2 are exposed from the holder 6 'to the cathode heat treatment. As the heat treatment effect increases, the stabilized current characteristics over time eliminates the change in brightness (brightness) on the screen, thereby providing a reliable color-brown tube.

Claims (1)

음극가열용 히터(1)가 삽입 설치된 음극슬리브(2) 상단에 기체금속(3)과 전자방사물질층(4)이 구비되고, 음극슬리브(2) 외측하단과 홀더 상부에 리본 형태의 스트랩(Strap)을 연결시켜 구비된 음극에 있어서,A gas metal 3 and an electron-emitting material layer 4 are provided on the upper portion of the negative electrode sleeve 2 in which the negative electrode heating heater 1 is inserted, and a ribbon-shaped strap is formed on the outer bottom of the negative electrode sleeve 2 and the upper part of the holder. In the cathode provided by connecting the strap, 홀더(6')상면으로부터 기체금속(3)상면까지의 거리(A1)가 1.0∼1.6㎜ 되게 함을 특징으로 하는 음극선관용 음극구조체.A cathode structure for cathode ray tube, characterized in that the distance (A 1 ) from the upper surface of the holder (6 ') to the upper surface of the base metal (3) is 1.0 to 1.6 mm.
KR10-1998-0029146A 1998-07-20 1998-07-20 Cathode Structure for Cathode Ray Tube KR100504460B1 (en)

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US7071605B2 (en) 2003-01-21 2006-07-04 Lg.Philips Displays Korea Co., Ltd. Cathode structure for color cathode ray tube

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JPS58111236A (en) * 1981-12-25 1983-07-02 Toshiba Corp Electron gun structure
US4782263A (en) * 1984-05-21 1988-11-01 Rca Licensing Corporation Inline electron gun having at least one modified cathode assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7071605B2 (en) 2003-01-21 2006-07-04 Lg.Philips Displays Korea Co., Ltd. Cathode structure for color cathode ray tube

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