KR100224979B1 - Cathode ray tube - Google Patents

Cathode ray tube Download PDF

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KR100224979B1
KR100224979B1 KR1019970032081A KR19970032081A KR100224979B1 KR 100224979 B1 KR100224979 B1 KR 100224979B1 KR 1019970032081 A KR1019970032081 A KR 1019970032081A KR 19970032081 A KR19970032081 A KR 19970032081A KR 100224979 B1 KR100224979 B1 KR 100224979B1
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South Korea
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funnel
cathode ray
conductive film
ray tube
film
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KR1019970032081A
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Korean (ko)
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KR19990009619A (en
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오승희
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구자홍
엘지전자주식회사
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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/863—Passive shielding means associated with the vessel
    • H01J2229/8631—Coatings
    • H01J2229/8632—Coatings characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/88—Coatings
    • H01J2229/882—Coatings having particular electrical resistive or conductive properties

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  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

본 발명은 음극선관의 도전막구조에 관한 것으로서, 특히 음극선관의 내부에서 발생하는 방전 전류에 의한 회로 손상을 방지하면서 도전성을 좋게 하는 데 그 목적이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive film structure of a cathode ray tube, and in particular, an object thereof is to improve conductivity while preventing circuit damage caused by discharge current generated inside the cathode ray tube.

이와 같은 목적을 달성하기 위해 본 발명은 펀넬의 내면에 도전막을 도포하는 데 있어, 펀넬과 판넬의 결합부부터 콘텍트 스프링이 펀넬에 접촉되는 부분 아래까지 저저항부를 형성하도록 저저항막을 도포하고, 상기 저저항부 이외의 펀넬과 네크부측에 고저항부를 형성하도록 고저항막을 도포한 것이다.In order to achieve the above object, the present invention is to apply a conductive film on the inner surface of the funnel, to apply a low resistance film to form a low resistance portion from the coupling portion of the funnel and the panel to the contact spring below the contacting funnel, A high resistance film is applied to form a high resistance portion on the side of the funnel and the neck portion other than the low resistance portion.

Description

음극선관의 도전막구조Conductive film structure of cathode ray tube

본 발명은 음극선관의 도전막구조에 관한 것으로서, 특히 음극선관의 내부에서 발생하는 방전 전류에 의한 회로 손상을 방지하면서 도전성을 좋게 하도록 한 음극선관의 도전막구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive film structure of a cathode ray tube, and more particularly to a conductive film structure of a cathode ray tube made to improve conductivity while preventing circuit damage caused by discharge current generated inside the cathode ray tube.

일반적인 음극선관은 도 1 에 도시된 바와 같이, 내측면에 R, G, B의 형광막(1)이 도포되어 있는 판넬(2)과, 상기 판넬(2)의 후단에 프리트 그라스(3)에 의해 융착되어진 펀넬(4)과, 상기 펀넬(4)의 네크부(5)에 봉입되어 전자빔을 방사하는 전자총(6)으로 구성하였다.As shown in FIG. 1, a typical cathode ray tube includes a panel 2 having R, G, and B fluorescent films 1 coated on its inner surface, and a frit glass 3 at a rear end of the panel 2. It consists of a funnel (4) fused by this, and an electron gun (6) enclosed in the neck portion (5) of the funnel (4) to emit an electron beam.

상기 전자총(6)에 인가되는 고압은 전자총 스프링(9)이 펀넬의 내면에 접촉되어 인가된다.The high pressure applied to the electron gun 6 is applied by contacting the inner surface of the funnel with the electron gun spring 9.

그리고, 상기 펀넬(4)의 내면에는 전기적 도통경로를 형성하도록 도전막(7)이 도포되고, 상기 판넬(2)의 형광막(1)에도 전기가 흘러 형광막(2)이 발광되도록 펀넬(4)의 도전막(7)위에 콘텍트 스프링(8)을 장착한다.In addition, a conductive film 7 is coated on an inner surface of the funnel 4 so as to form an electrical conductive path, and electricity flows through the fluorescent film 1 of the panel 2 so that the fluorescent film 2 emits light. The contact spring 8 is mounted on the conductive film 7 of 4).

상기 도전막(7)은 일반적으로 흑연과 규산염의 혼합물이나, 흑연과 규산염의 혼합물에 금속 산화물을 첨가하여 조성된다.The conductive film 7 is generally formed by adding a metal oxide to a mixture of graphite and silicate or a mixture of graphite and silicate.

이와 같이 구성된 종래의 음극선관은 전자총(6)으로부터 발사되는 전자빔에 의해 판넬(2)의 내면에 도포된 형광막(1)이 발광하게 된다.In the conventional cathode ray tube configured as described above, the fluorescent film 1 coated on the inner surface of the panel 2 is emitted by the electron beam emitted from the electron gun 6.

이때, 상기 전자빔의 흐름을 원활히 하기 위해 음극선관내부가 전체적으로 전기적 도통 경로 역할을 할 수 있도록 음극선관의 펀넬(4) 내면에 도전막(7)을 도포한다.At this time, in order to facilitate the flow of the electron beam, a conductive film 7 is applied to the inner surface of the funnel 4 of the cathode ray tube so that the inside of the cathode ray tube may serve as an electrical conduction path as a whole.

상기 도전막(7)은 도전성이 좋은 흑연 분말에 접착성이 좋은 규산염을 첨가하여 조성한다.The conductive film 7 is formed by adding silicate having good adhesion to graphite powder having good conductivity.

상기와 같이 조성되어진 도전막(7)은 도 2 와 같이, 노즐을 통한 분사법, 브러쉬를 이용한 도포법, 물처럼 위에서 흘러내리게 하는 플로우 도포법 등으로 펀넬(4) 내부에 전체적으로 도포한다.The conductive film 7 formed as described above is entirely applied to the inside of the funnel 4 by a spraying method through a nozzle, a coating method using a brush, a flow coating method which flows down like water, and the like.

그리고, 전자총(6)이 장착되는 네크부(5)에는 접착력을 높여주기 위해 규산염을 소량 첨가해 2단으로 도포한다.Then, a small amount of silicate is added to the neck portion 5 on which the electron gun 6 is mounted and applied in two stages.

그러나, 이러한 종래 음극선관용 도전막은 흑연과 규산염으로 구성되어 도전성이 좋으므로 전류의 흐름이 원활하게 되어 음극선관의 내부에 방전전류 발생 시 그 전류치가 커지게 되고, 상기 전류에 의해 음극선관의 외부에 있는 회로 기판의 부품에 치명적인 손상을 주는 문제점이 있었다.However, such a conventional cathode ray tube conductive film is composed of graphite and silicate, so the conductivity is good, so that the current flows smoothly, and when the discharge current is generated inside the cathode ray tube, the current value increases, There was a problem that causes a fatal damage to the components of the circuit board.

상기 문제점을 해결하기 위해 전기적 부도체인 금속산화물을 규산염과 흑연의 혼합물에 일정량 첨가하여 전기 저항값을 높인 도전막이 사용되었지만 음극선관 전체에 전기적 저항값이 높아지게 되어 전류의 흐름이 원활하지 않아 판넬 형광면이 깜빡거리는 전기 도통 불량이 발생하고, 흑연보다 고가인 고순도의 금속 산화물을 포함한 도전막을 펀넬 전체에 형성하게 되어 제조원가가 상승하는 문제점이 있었다.In order to solve the above problems, a conductive film having a high electrical resistance value was added by adding a certain amount of an electrical insulator metal oxide to a mixture of silicate and graphite, but the electrical resistance value of the entire cathode ray tube was increased so that the current flow was not smooth and the panel fluorescent screen Flickering electrical conduction defects occur, and a conductive film including a high-purity metal oxide, which is more expensive than graphite, is formed in the entire funnel, resulting in an increase in manufacturing cost.

본 발명은 이러한 점을 감안하여 펀넬에 도포되는 도전막의 저항값을 각 부위별로 다르게 하여 저저항부와 고저항부를 형성함으로써 음극선관의 외부회로를 보호하고, 선명한 색순도를 유지시켜 음극선관의 신뢰성을 높이며, 제조원가를 절감하는 데 그 목적이 있다.In view of the above, the present invention protects the external circuit of the cathode ray tube by forming the low resistance portion and the high resistance portion by varying the resistance value of the conductive film applied to the funnel for each portion, and maintains the color purity to maintain the reliability of the cathode ray tube. The purpose is to increase manufacturing costs and to reduce manufacturing costs.

도 1 은 일반적인 음극선관의 구성도.1 is a block diagram of a typical cathode ray tube.

도 2 는 종래 음극선관의 도전막 도포방법을 나타낸 것으로서,2 shows a method of applying a conductive film of a conventional cathode ray tube,

(가)는 분사법.(A) Injection method.

(나)는 브러쉬 도포법.(B) Brush coating method.

(다)는 플로우 코팅법.(C) is flow coating method.

도 3 은 본 발명에 의한 음극선관의 구성도.3 is a block diagram of a cathode ray tube according to the present invention.

*** 도면의 주요 부분에 대한 부호의 설명 ****** Explanation of symbols for the main parts of the drawing ***

101 : 형광막 102 : 판넬101: fluorescent film 102: panel

103 : 프리트 그라스 104 : 펀넬103: frittgrass 104: funnel

105 : 네크부 106 : 전자총105: neck portion 106: electron gun

107 : 도전막 107a : 저저항막107: conductive film 107a: low resistance film

107b : 고저항막 108 : 콘텍트 스프링107b: high resistance film 108: contact spring

109 : 저저항부 110 : 고저항부109: low resistance portion 110: high resistance portion

이하, 본 발명을 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 3 은 본 발명에 의한 음극선관의 구성도를 나타낸 것으로서, R, G, B의 형광막(101)이 도포되어 있는 판넬(102)과, 상기 판넬(102)의 후단에 프리트 그라스(103)에 의해 융착되어진 펀넬(104)과, 상기 펀넬(104)의 네크부(105)에 봉입되어 전자빔을 방사하는 전자총(106)으로 구성된다.3 shows a schematic diagram of a cathode ray tube according to the present invention, in which a panel 102 having R, G, and B fluorescent films 101 is coated, and a frit glass 103 at a rear end of the panel 102. It consists of a funnel 104 fused by an electron gun 106 is sealed in the neck portion 105 of the funnel 104 to emit an electron beam.

그리고 상기 펀넬(104)의 내면에는 도전막(107)이 도포되는데, 펀넬(104)과 판넬(102)의 결합부부터 콘텍트 스프링(108)이 펀넬(104)에 접촉하는 부분까지는 도전막(107)의 저항값이 낮은 저저항부(109)를 형성하도록 저저항막(107a)을 도포하고, 상기 저저항부(109) 이외의 네크부측에는 도전막(107)의 저항값이 높은 고저항부(110)를 형성하도록 고저항막(107b)을 도포한다.In addition, a conductive film 107 is coated on the inner surface of the funnel 104, and the conductive film 107 is formed from a coupling portion of the funnel 104 and the panel 102 to a portion where the contact spring 108 contacts the funnel 104. The low resistance film 107a is applied so as to form the low resistance part 109 having a low resistance value, and the high resistance part having a high resistance value of the conductive film 107 on the side of the neck other than the low resistance part 109. The high resistance film 107b is applied to form 110.

상기 저저항막(107a)은 흑연과 규산염으로 조성되며, 상기 고저항막(107b)은 흑연과 규산염의 혼합물에 산화철(Fe2O3)등의 금속산화물을 첨가하여 조성한다.The low resistance film 107a is composed of graphite and silicate, and the high resistance film 107b is formed by adding a metal oxide such as iron oxide (Fe 2 O 3 ) to a mixture of graphite and silicate.

이와같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above is as follows.

먼저, 펀넬(104)의 윗부분부터 콘텍트 스프링(108)이 펀넬(104)에 접촉되는 부분 아래까지 형성되는 저저항부(109)에 있어, 상기 저저항부(109)의 전기적 저항값은 2㏀ / 3㎝이하가 되어야하며, 이는 저항값이 2㏀ / 3㎝를 초과하면 콘텍트 스프링(108) 접촉부의 전기 흐름이 나빠져 접촉 저항이 높아지게 되고, 상기 접촉 저항이 높아짐에 따라 발열이 일어나면서 도전막이 연소하게 되어 도통 불량이 발생하기 때문이다.First, in the low resistance section 109 formed from the upper portion of the funnel 104 to the bottom of the contact spring 108 in contact with the funnel 104, the electrical resistance value of the low resistance section 109 is 2 kW. It should be less than / 3cm, which means that if the resistance exceeds 2㏀ / 3cm, the electrical flow of the contact spring 108 contact becomes worse and the contact resistance becomes high. This is because combustion causes poor conduction.

따라서, 도전성을 좋게하기 위해 저저항막(107a)은 흑연과 규산염으로만 구성하는 것이다.Therefore, in order to improve conductivity, the low resistance film 107a is composed of only graphite and silicate.

그리고, 상기 저저항부(109) 이외의 펀넬과 네크부측에 형성되는 고저항부(110)에 있어, 상기 고저항부(110)의 전기적 저항 규격은 5㏀ / 3㎝ ∼ 50㏀ / 3㎝가 되어야 하며, 만일, 저항값이 5㏀ / 3㎝ 미만이 되면 펀넬(104)에 도포된 도전막(107)의 전체 저항이 낮아져 방전 전류가 높아지게 되고, 상기 방전 전류가 높아짐에 따라 음극선관의 회로에 손상을 주어 금속 산화물을 첨가한 효과가 없어지게 되며, 상기 저항값이 50㏀ / 3㎝를 초과하면 방전 전류가 낮아지게 되어 판넬(102)의 내면에 도포된 형광막(101)의 발광 시 화상의 잔상이 남게 된다.In addition, in the high resistance portion 110 formed on the side of the funnel and the neck other than the low resistance portion 109, the electrical resistance of the high resistance portion 110 is 5 kW / 3 cm to 50 kW / 3 cm If the resistance value is less than 5㏀ / 3㎝, the total resistance of the conductive film 107 applied to the funnel 104 is lowered to increase the discharge current, the higher the discharge current of the cathode ray tube Damage to the circuit causes the effect of adding a metal oxide to disappear, and when the resistance exceeds 50 mA / 3 cm, the discharge current is lowered to emit light of the fluorescent film 101 coated on the inner surface of the panel 102. The afterimage of the visual image remains.

따라서, 저항성을 높이도록 고저항막(107b)은 흑연과 규산염의 혼합물에 부도체인 산화철 분말을 일정량 첨가하여 구성하는 것이다.Therefore, the high resistance film 107b is formed by adding a certain amount of iron oxide powder, which is an insulator, to a mixture of graphite and silicate so as to increase resistance.

여기서 산화철의 투입량은 흑연 : 산화철의 혼합비가 1 : 1 ∼ 1 : 3이 되어야 하는데, 이는 상기 산화철이 흑연보다 적게 첨가되면 도전막의 저항값은 5㏀ / 3㎝ 미만이 되고, 산화철과 흑연의 혼합비가 1 : 3을 초과하면 저항값이 50㏀ / 3㎝를 넘게 되어 상기의 문제점이 다시 발생되기 때문이다.Here, the amount of iron oxide to be added should be a mixture ratio of graphite: iron oxide 1: 1 to 1: 3, which means that when the iron oxide is added less than graphite, the resistance value of the conductive film is less than 5 m 3/3 cm, and the mixing ratio of iron oxide and graphite This is because when the ratio exceeds 1: 3, the resistance value exceeds 50 mW / 3 cm and the above problem occurs again.

이상에서 설명한 바와 같이 본 발명은 도전막을 펀넬의 내표에 도포하는 데 있어, 각 부위별로 저항값을 다르게 하여 저저항부와 고저항부를 형성함으로써, 방전 전류를 저감하여 음극선관의 회로를 보호하고, 음극선관의 선명한 색순도를 유지하며, 제조원가를 절감하는 효과가 있다.As described above, in the present invention, in applying the conductive film to the inner table of the funnel, the resistance value is changed for each part to form the low resistance portion and the high resistance portion, thereby reducing the discharge current to protect the circuit of the cathode ray tube, It maintains the vivid color purity of the cathode ray tube and reduces the manufacturing cost.

Claims (5)

R, G, B의 형광막이 도포되어 있는 판넬과, 상기 판넬의 후단에 융착되어진 펀넬과, 상기 펀넬의 네크부에 봉입되어 전자빔을 방사하는 전자총과, 상기 전자총에서 방사된 전자빔의 흐름을 원활히 하도록 펀넬의 내면에 도포되는 도전막으로 구성된 음극선관에 있어서,A panel coated with R, G, and B fluorescent films, a funnel fused to a rear end of the panel, an electron gun encapsulated in a neck portion of the funnel to emit an electron beam, and a smooth flow of the electron beam emitted from the electron gun In the cathode ray tube composed of a conductive film applied to the inner surface of the funnel, 상기 펀넬의 내면에 도전막을 도포하는 데 있어, 펀넬과 판넬의 결합부부터 콘텍트 스프링이 펀넬에 접촉되는 부분 아래까지 저저항부를 형성하도록 저저항막을 도포하고,In applying a conductive film to the inner surface of the funnel, a low resistance film is applied so as to form a low resistance part from the joint portion of the funnel and the panel to the bottom of the contact spring contacting the funnel, 상기 저저항부 이외의 네크부측에 고저항부를 형성하도록 고저항막을 도포한 것을 특징으로 하는 음극선관용 도전막의 조성물.The composition of the conductive film for cathode ray tubes characterized by coating a high resistance film so as to form a high resistance part on the neck side other than the low resistance part. 제 1 항에 있어서,The method of claim 1, 상기 저저항막은 흑연과 규산염으로 구성되며,The low resistance film is composed of graphite and silicate, 상기 저저항부의 저항값은 2㏀ / 3㎝ 이하인 것을 특징으로 하는 음극선관용 도전막의 조성물.The resistance value of the said low resistance part is 2 음극 / 3 cm or less, The composition of the cathode ray tube conductive film characterized by the above-mentioned. 제 1 항에 있어서,The method of claim 1, 상기 고저항막은 흑연과 규산염의 혼합물에 부도체인 금속산화물을 첨가하여 구성되며,The high resistance film is formed by adding a metal oxide which is a nonconductor to a mixture of graphite and silicate, 상기 고저항부의 저항값은 5㏀ / 3㎝ ∼ 50㏀ / 3㎝인 것을 특징으로 하는 음극선관용 도전막의 조성물.The resistance value of the said high resistance part is 5 ㏀ / 3cm-50 ㏀ / 3cm The composition of the conductive film for cathode ray tubes characterized by the above-mentioned. 제 3 항에 있어서,The method of claim 3, wherein 상기 금속산화물은 산화철인 것을 특징으로 하는 음극선관용 도전막의 조성물.The metal oxide is a composition of a cathode ray tube conductive film, characterized in that the iron oxide. 제 3 항에 있어서,The method of claim 3, wherein 상기 흑연과 금속산화물의 혼합비는 1 : 1 ∼ 1 : 3인 것을 특징으로 하는 음극선관용 도전막의 조성물.The mixing ratio of the graphite and the metal oxide is 1: 1 to 1: 3, the composition of the conductive film for cathode ray tube.
KR1019970032081A 1997-07-10 1997-07-10 Cathode ray tube KR100224979B1 (en)

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KR20220001118U (en) 2020-11-12 2022-05-19 주식회사 한국가스기술공사 Cleaning device for electric motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220001118U (en) 2020-11-12 2022-05-19 주식회사 한국가스기술공사 Cleaning device for electric motor

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