KR19980028117A - Cathode structure of electron gun for cathode ray tube - Google Patents

Cathode structure of electron gun for cathode ray tube Download PDF

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Publication number
KR19980028117A
KR19980028117A KR1019960047106A KR19960047106A KR19980028117A KR 19980028117 A KR19980028117 A KR 19980028117A KR 1019960047106 A KR1019960047106 A KR 1019960047106A KR 19960047106 A KR19960047106 A KR 19960047106A KR 19980028117 A KR19980028117 A KR 19980028117A
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South Korea
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cathode
negative electrode
sleeve
electron gun
ray tube
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KR1019960047106A
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Korean (ko)
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KR100198567B1 (en
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고병두
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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
    • 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
    • H01J29/485—Construction of the gun or of parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/48—Electron guns
    • H01J2229/4803—Electrodes

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  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

열원으로부터 전열되는 열전도 손실을 줄여 음극의 열효율을 극대화함으로서, 소비전력을 줄일 수 있음은 물론, 제조공정이 간단하여 생산성을 향상시킬 수 있는 음극선관용 전자총의 음극구조체에 관한 것으로서, 음극슬리이브(14)의 길이가 6.5∼7.0㎜이고, 상기 음극슬리이브를 흑화열처리한 것이다.The present invention relates to a cathode structure of a cathode ray tube electron gun, which can reduce power consumption and improve productivity by simplifying a manufacturing process by maximizing a cathode's thermal efficiency by reducing heat conduction loss transmitted from a heat source. ) Is 6.5 to 7.0 mm in length, and the cathode sleeve is blackened.

Description

음극선관용 전자총의 음극구조체Cathode structure of electron gun for cathode ray tube

본 발명은 음극선관용 전자총의 음극구조체에 관한 것으로서, 더욱 상세하게는 열원으로부터 전열 되는 열전도 손실을 줄여 음극의 열효율을 극대화함으로서 소비전력을 줄일 수 있음은 물론, 제조공정이 간단하여 생산성을 향상시킬 수 있는 음극선관용 전자총의 음극구조체에 관한 것이다.The present invention relates to a cathode structure of an electron gun for a cathode ray tube, and more particularly, it is possible to reduce power consumption by maximizing a thermal efficiency of a cathode by reducing heat conduction loss transferred from a heat source, as well as to reduce power consumption and to improve productivity by simplifying a manufacturing process. And a cathode structure of an electron gun for a cathode ray tube.

일반적으로, 텔레비젼 수상관에서 사용되는 음극선관은 도 1에 도시한 바와같이 전극과 히터의 열에너지와의 전위(전압)차에 의해 방사된 전자가 전자총(1)의 정전렌즈의 작용으로 집속 및 가속작용을 하여 전자총(1)을 통과하고. 이 전자총을 통과한 전자는 편향요크(2)에서 전기유도에 의한 자체의 영향을 받아 최대 발산각 90°∼ 110°편향을 하여 새도우마스크(3)의 미세한 슬로트(도시는 생략함)를 통해 형광면(4)에 충돌하여 스크린에 화상이 출현하는 것으로, 이때 음극선관에서 음극의 역할을 전자들의 공급원이 된다.In general, the cathode ray tube used in the television receiving tube is focused and accelerated by the action of the electrostatic lens of the electron gun 1, the electrons emitted by the potential (voltage) difference between the electrode and the thermal energy of the heater as shown in FIG. Acting through the electron gun (1). The electrons passing through the electron gun are deflected by the electric induction in the deflection yoke 2 and are deflected by 90 ° to 110 ° in the maximum divergence angle. The image appears on the screen by colliding with the fluorescent surface 4, and serves as a source of electrons serving as a cathode in the cathode ray tube.

이와 같은 음극선관을 도 2a에서 도시한 헤메틱(HERMETIC)형과 도 2b에서 도시한 리본(RIBBON)형으로 크게 분류되는데, 우선 일반적으로 많이 사용되는 헤메틱형의 구성을 보면 외부에 커버(17)와 써포터(18)가 순차적으로 부착 및 고정된 음극지지체(16)와, 이 음극지지체의 내부에 음극히터(11)와 음극(12)의 외부를 감싸는 음극슬리이브(14)와, 이 음극슬리이브의 외주면에 결합되는 음극홀더(15)가 상기 음극지지체(16)의 내주면에 밀착 삽입되어 있다.Such cathode ray tubes are broadly classified into a HERMETIC type shown in FIG. 2A and a RIBBON type type shown in FIG. 2B. And the negative electrode support 16 to which the supporter 18 is sequentially attached and fixed, the negative electrode sleeve 14 surrounding the outside of the negative electrode 11 and the negative electrode 12 inside the negative electrode support, and the negative electrode sled The negative electrode holder 15 coupled to the outer circumferential surface of the eve is tightly inserted into the inner circumferential surface of the negative electrode support 16.

한편, 도 2b는 상기 헤메틱형과 비교하여 음극홀더(15)의 길이를 상부로 길게 연장하고 음극슬리이브(14)의 길이는 짧게 하여 상기 음극홀더(15)의 상단과 음극슬리이브(14)의 하단이 리본(20)에 의해 상호 연결하여 고정되도록 하는 방식이다.On the other hand, FIG. 2B shows that the length of the negative electrode holder 15 is extended to the upper side and the length of the negative electrode sleeve 14 is shorter than that of the hemetic type, so that the top of the negative electrode holder 15 and the negative electrode sleeve 14 are short. The bottom of the method is to be connected to each other by the ribbon 20 is fixed.

상기의 헤메틱형과 리본형은 공통적으로 음극(12)이 상기 음극지지체(16)내에 삽입고정되어 있는데, 이 음극지지체는 비드그라스(Bead Glass)(19)에 서포터(18)에 의해 고정되며, 상기 음극지지체(16)의 내부에는 음극홀더(15)가 밀착삽입되고, 이 음극홀더의 내부에는 음극(12)을 감싸고 있는 음극슬리이브(14)가 삽입되어 있다.The hemetic type and the ribbon type are commonly fixed to the negative electrode 12 is inserted into the negative electrode support 16, the negative electrode support is fixed to the bead glass (19) by the supporter 18, The negative electrode holder 15 is tightly inserted into the negative electrode support 16, and the negative electrode sleeve 14 surrounding the negative electrode 12 is inserted into the negative electrode holder.

또한 상기 음극슬리이브(14)의 상단은 음극캡(13)에 의해 밀봉되어 있으며,이 음극캡의 상면에는 전자방사원인 산화바륨(BaCo3), 산화칼슘(CaCo3), 산화스트론튬(SrCo3)을 혼합한 탄산염이 도포 되어 있으며 에이징(Aging)공정에 의해 열분해되어 전자방사가 이루어진다.In addition, the upper end of the cathode sleeve 14 is sealed by the anode cap 13, an upper surface of the cathode cap, the electromagnetic radiation causes barium oxide (BaCo 3), calcium oxide (CaCo 3), strontium oxide (SrCo 3 ) Is mixed with carbonate, and is thermally decomposed by aging process to make electrospinning.

한편, 상기 음극슬리이브(14)는 음극히터(11)의 열 방출량을 높이고 열 방출속도를 빨리할 수 있도록 1050℃의 노(爐)에 수분을 포함한 수소를 주입하여 약 4 ∼ 5분동안 열처리하면 니크롬(20%)과 크롬(80%)이 반응하여 표면을 흑화(黑化)시키는 흑화열처리를 하거나, 음극히터(11)의 온도를 상승시키기 위해 950℃의 노(爐)에 수소를 주입하여 약 7분동안 환원열처리를 하여 사용하였다.On the other hand, the cathode sleeve 14 is heat-treated for about 4 to 5 minutes by injecting hydrogen containing water into the furnace at 1050 ℃ to increase the heat release amount of the cathode heater 11 and speed up the heat release rate When the chromium (20%) and chromium (80%) react, the blackening heat treatment blackens the surface or hydrogen is injected into a furnace at 950 ° C. to raise the temperature of the cathode heater 11. It was used by reducing heat treatment for about 7 minutes.

상기 음극히터(11)의 열량에 비해 음극(12)의 부피가 작으면 과다한 열상승으로 음극(12)자체에 손상이 발생하여 전자총의 수명을 단축시키고, 반대로 음극(12)의 부피에 비해 열량이 적으면 탄산암의 충분한 분해가 이루어지지 않으므로 방사열량이 저하되는데. 이와 같이 음극가열용 음극히터(11)와 열을 방출하는 음극(12)의 열적균형을 맞추는 작업은 어려운 기술중의 하나이며, 이를 해결하기 위한 방법으로 전술한바 있는 리본방식과 헤메틱방식 등을 각각 적용하여 사용하고 있다.When the volume of the negative electrode 12 is smaller than the heat of the negative electrode 11, damage to the negative electrode 12 itself occurs due to excessive heat rise, thereby shortening the life of the electron gun, and conversely, the amount of heat compared to the volume of the negative electrode 12. If the amount is small, the amount of radiant heat decreases because sufficient decomposition of carbonate rocks is not achieved. As such, the task of matching the thermal balance between the cathode heater 11 for heating the cathode and the cathode 12 for dissipating heat is one of difficult technologies, and as a method for solving the problem, the ribbon method and the heme method are described. Each is applied and used.

그러나 상기 리본방식이나 헤메틱방식은 열효율성 면에서는 양호한 편이나, 리본방식은 음극캡(13)과 음극슬리이브(14)가 리본(20)으로 연결되어 있기 때문에 충격에 약해서 흔들리기 쉬운 단점과 음극(12)의 조립과정이 어려워 생산성을 저하시킬뿐만 아니라 고가(高價)인 단점이 있었다.However, the ribbon method or the hemetic method is good in terms of thermal efficiency, but the ribbon method is weak in shock because it is connected to the cathode cap 13 and the cathode sleeve 14 by the ribbon 20 and is easily shaken. The assembly process of the negative electrode 12 is difficult, not only to reduce productivity, but also has a disadvantage of being expensive.

한편, 헤메틱방식은 상기 리본방식에 비해 외부로부터의 충격에는 강하지만 음극(12)이 가열되면 음극캡(13)에서 가스가 발생하여 여타 음극에 비해 방출량에 많은 영향을 받으며, 생산설비가 복잡하고 이에 따른 설비비가 증가하는 문제점도 있었다.On the other hand, the hemetic method is more resistant to impact from the outside than the ribbon method, but when the cathode 12 is heated, gas is generated in the cathode cap 13, which is more affected by the emission amount than other cathodes, and the production equipment is complicated. In addition, there was a problem that the equipment cost increases accordingly.

또한, 상기 음극슬리이브(14)는 전술한바와 갈이 흑화열처리 또는 환원열처리를 하여 사용하였는데, 흑화열처리만을 하였을 경우 음극(12)의 온도가 떨어지는 단점이 있었고, 환원열처리만을 하였을 경우 초기화면출화시간(전원을 인가 했을때 최초화면이 뜨는 시간)이 늦어지는 각각의 단점을 갖고 있었다.In addition, the negative electrode sleeve 14 was used by the blackening heat treatment or reduction heat treatment as described above, when only the blackening heat treatment had a disadvantage that the temperature of the negative electrode 12 was lowered, and if only the reduction heat treatment, the initial screen ignition Each of the disadvantages was that the time (the time the initial screen appeared when the power was applied) was delayed.

본 발명은 위와 같은 종래 음극구조체의 문제점을 해결하기 위해 안출한 것으로서, 음극슬리이브의 길이를 6.5∼7.0mm로 하고, 상기 음극슬리이브를 흑화환원열처리함으로써 음극의 온도를 상승시키고 초기화면출파시간을 단축함은 물론 구조가 간단하여 제작이 손쉬운 음극선관용 전자총의 음극구조체를 제공하는 것이다.The present invention has been made to solve the problems of the conventional negative electrode structure as described above, the length of the negative electrode sleeve to 6.5 ~ 7.0mm, by increasing the temperature of the negative electrode by blackening reduction heat treatment of the negative electrode sleeve and initial surface emission time In addition to shortening the structure is simple to provide a cathode structure of the electron gun for cathode ray tube easy to manufacture.

도 1은 일반적인 수상관을 도시한 일부 측단면도1 is a partial side cross-sectional view showing a typical water pipe

도 2a는 종래 헤메틱형 음극선관을 도시한 측단면도Figure 2a is a side cross-sectional view showing a conventional hemetic cathode ray tube

도 2b는 종래 리본형 음극선관을 확대 도시한 측단면도Figure 2b is an enlarged side cross-sectional view showing a conventional ribbon type cathode ray tube

도 3은 본 발명의 음극구조체를 발췌하여 도시한 측단면도Figure 3 is a side cross-sectional view showing an extract of the negative electrode structure of the present invention

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

13 : 음극캡(CAP) 14 : 음극슬리이브(SLEEVE)13: Cathode cap (CAP) 14: Cathode sleeve (SLEEVE)

15 : 음극홀더15: cathode holder

본 발명의 음극구조체를 도시한 도 3을 참조하여 설명한다.A negative electrode structure of the present invention will be described with reference to FIG. 3.

상기의 음극구조체는 발열하는 음극가열용 음극히터(11)와 음극(12)이 내장되고, 고온강도가 크며 불순물이 적고 열전도가 빠른 니켈을 주성분으로하여 에이징시 탄산염의 활성화를 위해 환원제인 마그네슘과 실리콘이 미량 함유된 음극캡(13)에 의해 상부가 밀폐된 음극슬리이브(14)와, 이 음극슬리이브의 하부가 삽입되는 음극홀더(15)와, 이 음극홀더의 외주면에 밀착 결합되는 음극지지체(16)로 구성된다.The negative electrode structure includes a negative electrode heater 11 and a negative electrode 12 for heat generation, and includes magnesium, which is a reducing agent, for activating carbonate during aging, mainly containing nickel having a high temperature strength, low impurities and fast thermal conductivity. A cathode sleeve 14 whose upper part is sealed by a cathode cap 13 containing a small amount of silicon, a cathode holder 15 into which a lower part of the cathode sleeve is inserted, and a cathode closely coupled to the outer circumferential surface of the cathode holder It is composed of a support 16.

한편, 상기 음극슬리이브(14)는 음극홀더(15)의 전장길이에 비해 2배정도 길게 하는 것이 바람직한데, 그 이유는 2배이하일 경우 음극(12)의 온도가 올라가지 않으므로 열효율이 떨어지고, 2배이상일 경우에는 이에 비례하여 여타부품들이 함께 길어져야 하는 구조상의 문제점이 발생하므로 이를 고려한 가장 효율적인 길이의 비율이기 때문이다.On the other hand, the negative electrode sleeve 14 is preferably about 2 times longer than the total length of the negative electrode holder 15, the reason is that the temperature of the negative electrode 12 does not rise when less than 2 times, the thermal efficiency is lowered, 2 times In case of the above problem, since the structural problem that the other parts have to be lengthened in proportion to this occurs, it is the ratio of the most efficient length in consideration of this.

따라서 열효율을 향상시킴과 함께 다른 부품의 형태를 크게 변경하지 않는 두가지 조건을 만족하는 효과적인 음극슬리이브(14)의 길이는 6.5∼7㎜, 두께는 15∼18㎛, 외경은 1.5∼1.6㎜가 되며, 이 음극슬리이브(14)에 밀착 삽입되는 음극홀더(15)의 길이는 전술한 바와같이 음극슬리이브 길이의 절반이 된다.Therefore, the effective cathode sleeve 14 which satisfies the two conditions that improve the thermal efficiency and do not change the shape of other parts significantly, the length is 6.5-7mm, the thickness is 15-18㎛, the outer diameter is 1.5-1.6mm The length of the negative electrode holder 15 which is tightly inserted into the negative electrode sleeve 14 is half the length of the negative electrode sleeve as described above.

또한 상기 음극슬리이브(14)는 표면을 흑화시킨후 다시 환원하는 열처리를 하는데, 이를 흑화환원열처리라고 한다.In addition, the cathode sleeve 14 is heat treated to blacken the surface and then reduce again, this is called blackening reduction heat treatment.

즉, 이러한 열처리는 음극슬리이브(14)의 표면을 흑화시킨후 다시 환원시키면 초기상태의 색상을 거의 되찾게 되는데, 이때는 금속내의 응력이 제거될뿐만 아니라 금속내의 불순물이 제거되는 금속조직의 변형이 일어나게 된다.In other words, the heat treatment blackens the surface of the cathode sleeve 14 and then reduces the color of the initial state almost again. In this case, not only the stress in the metal is removed but also the deformation of the metal structure in which impurities in the metal are removed. do.

이와 같은 본 발명은 종래의 헤메틱형에서 커버(17)를 제외하면 형태가 유사하지만 음극슬리이브(14)의 전장을 0.8mm 더 길게 하고 홀더(15)의 전장을 1.6mm 짧게 하였는데, 이때 음극(12)의 온도는 음극슬리이브(14)의 길이를 0.1mm 길게 하였을 때 4℃가 상승하므로 길이를 0.8mm로 하면 30∼40℃가 상승하게 된다.The present invention is similar in shape except for the cover 17 in the conventional hemetic type, but the overall length of the cathode sleeve 14 is 0.8mm longer and the length of the holder 15 is shorter 1.6mm, where the cathode ( The temperature of 12) increases by 4 ° C. when the length of the cathode sleeve 14 is increased by 0.1 mm, so that the temperature of 30 mm increases by 0.8 mm.

종래 음극히터(11)의 인가전류를 6.3V 680 mA에서 6.3V 320 mA의 저 전류로 적용하여도 음극(12)의 온도가 780±15℃를 유지하도록 함으로써 열효율을 향상시킬 수 있으며, 종래에 비해 음극히터(11)에 인가되는 전류를 절반이하로 줄임으로서 이에 비례하여 소비전력을 줄일 수 있는 장점과, 제작공정이 간단하여 제품의 생산성을 향상시킬 수 있는 장점도 있다.Even when the applied current of the conventional cathode heater 11 is applied at a low current of 6.3 V 320 mA at 6.3 V 680 mA, the thermal efficiency of the cathode 12 is maintained at 780 ± 15 ° C., thereby improving thermal efficiency. In comparison, the current applied to the cathode heater 11 is reduced to less than half, thereby reducing the power consumption in proportion to the current, and the manufacturing process is simple, thereby improving the productivity of the product.

또한 음극슬리이브(14)를 흑화환원열처리를 함으로써 음극(12)의 온도를 보다 높일 수 있고, 초기화면출화시간을 단축할 수 있는 효과도 얻을 수 있다.In addition, the blackening and reducing heat treatment of the cathode sleeve 14 can further increase the temperature of the cathode 12 and can also shorten the initial screen firing time.

Claims (3)

음극을 지지하고 있는 음극지지체와 써포터가 금속으로 구성되어 있고, 음극히터, 음극슬리이브, 음극홀더, 마그네슘과 실리콘을 함유한 니켈로 이루어진 음극캡을 구비하는 음극선관용 전자총 구조에 있어서, 상기 음극슬리이브의 길이가 6.5∼7.0㎜이고, 상기 음극슬리이브를 흑화열처리한 것을 특징으로 하는 음극선관용 전자총의 음극구조체.In the electron gun structure for a cathode ray tube, the cathode support and the supporter supporting the cathode are made of metal, and have a cathode heater, a cathode sleeve, a cathode holder, and a cathode cap made of nickel containing magnesium and silicon. A negative electrode structure of an electron gun for a cathode ray tube, wherein the length of the Eve is 6.5 to 7.0 mm and the cathode sleeve is blackened. 제 1 항에 있어서, 상기 음극홀더의 길이에 비해 음극슬리이브의 길이를 2배 길게한 것을 특징으로 하는 음극선관용 전자총의 음극구조체.The cathode structure of an electron gun for cathode ray tubes according to claim 1, wherein the length of the cathode sleeve is twice as long as that of the cathode holder. 제 1 항에 있어서, 상기 음극슬리이브의 두께는 15㎛ ∼18㎛이고, 그 외경은 1.5∼1.6㎜인 것을 특징으로 하는 음극선관용 전자총의 음극구조체.The cathode structure of an electron gun for cathode ray tubes according to claim 1, wherein the cathode sleeve has a thickness of 15 µm to 18 µm and an outer diameter of 1.5 to 1.6 mm.
KR1019960047106A 1996-10-21 1996-10-21 A cathode assembly structure of the electron-gun used in the crt KR100198567B1 (en)

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