KR20050117662A - An electroide structure of fiuorescent lamp used an insulated film - Google Patents

An electroide structure of fiuorescent lamp used an insulated film Download PDF

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KR20050117662A
KR20050117662A KR1020040042815A KR20040042815A KR20050117662A KR 20050117662 A KR20050117662 A KR 20050117662A KR 1020040042815 A KR1020040042815 A KR 1020040042815A KR 20040042815 A KR20040042815 A KR 20040042815A KR 20050117662 A KR20050117662 A KR 20050117662A
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South Korea
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electrode
glass tube
thin film
external electrode
insulating thin
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KR1020040042815A
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Korean (ko)
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이성률
최성호
이수빈
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동양산업(주)
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Publication of KR20050117662A publication Critical patent/KR20050117662A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/541—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch
    • H01J61/542—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch and an auxiliary electrode inside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/541—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch
    • H01J61/544—Igniting arrangements, e.g. promoting ionisation for starting using a bimetal switch and an auxiliary electrode outside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel
    • 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

본 발명은 액정표시장치용 백라이트 등에 사용되는 형광램프의 전극구조에 관한 것으로써, 보다 상세하게는 1차외부전극과 2차외부전극 사이에 고유전율을 가지는 절연박막을 구성함으로써 휘도특성이 향상되고 발광영역이 더욱 넓어진 절연박막을 이용한 형광램프의 전극구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of a fluorescent lamp used in a backlight for a liquid crystal display device, and more particularly, by forming an insulating thin film having a high dielectric constant between a primary external electrode and a secondary external electrode. An electrode structure of a fluorescent lamp using an insulating thin film having a wider light emitting area.

이를 위한 본 발명의 구성은 유리관 내부의 내부전극과 이어진 1차외부전극이 유리관 외벽면에 밀착되는 형상으로 돌출되고, 상기 유리관 외벽면으로 돌출되는 1차외부전극 위에는 고유전율의 절연박막으로 완전절연되며, 상기 절연박막위에는 외부전극이 밀착되어 구성되는 것을 특징으로 한다. The configuration of the present invention for this purpose is to protrude in a shape that the first external electrode connected to the inner electrode of the glass tube in close contact with the outer wall surface of the glass tube, and completely insulated with an insulating film of high dielectric constant on the primary outer electrode protruding to the outer wall of the glass tube The external electrode is in close contact with the insulating thin film.

상기와 같은 구성으로 절연박막의 높은 유전율에 의해 1차외부전극에 대전되는 전하를 유리관 내부의 내부전극으로 직접 유도되도록 하여 유리관 내부의 2차전자의 발생율을 증대시킴으로써 형광램프의 휘도특성 및 발광효율을 높일 수 있다. 또한 일반 EEFL에 비해 전극길이를 약 40∼60% 정도 짧게 할 수 있으므로 발광영역이 증가하는 효과가 있다.With the above structure, the electric charges charged to the primary external electrode are directly induced by the high dielectric constant of the insulating thin film to the internal electrode inside the glass tube, thereby increasing the generation rate of secondary electrons in the glass tube, thereby increasing the luminance characteristics and the luminous efficiency of the fluorescent lamp. Can increase. In addition, since the electrode length can be shortened by about 40 to 60% compared to the general EEFL, the light emitting area is increased.

Description

절연박막을 이용한 형광램프의 전극구조{an electroide structure of Fiuorescent Lamp used an insulated film} An electroide structure of Fiuorescent Lamp used an insulated film

본 발명은 액정표시장치용 백라이트 등에 사용되는 형광램프의 전극구조에 관한 것으로써, 보다 상세하게는 1차외부전극과 2차외부전극 사이에 고유전율을 가지는 절연박막을 구성함으로써 휘도특성이 향상되고 발광영역이 더욱 넓어진 절연박막을 이용한 형광램프의 전극구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of a fluorescent lamp used in a backlight for a liquid crystal display device, and more particularly, by forming an insulating thin film having a high dielectric constant between a primary external electrode and a secondary external electrode. An electrode structure of a fluorescent lamp using an insulating thin film having a wider light emitting area.

종래의 액정표시장치용 백라이트에 사용되는 형광램프는 크게 냉음극 형광램프(Cold Cathode Fluorescent Lamp, 이하 'CCFL'이라 함)와 외부전극 형광램프(External Electrode Fluorescent Lamp, 이하 'EEFL'이라 함)로 나누어진다.Conventional fluorescent lamps used in liquid crystal display backlights include cold cathode fluorescent lamps (CCFLs) and external electrode fluorescent lamps (EEFLs). Divided.

상기 CCFL은 유리관 내부에 실린더형의 니켈전극을 설치하여 상기 니켈전극을 통한 전압방전에 의하여 고휘도의 빛을 발생시킨다는 장점이 있다. The CCFL has an advantage that a cylindrical nickel electrode is installed inside a glass tube to generate high luminance light by voltage discharge through the nickel electrode.

그러나 유리관 내부에 니켈전극을 설치하는 것이 매우 어려울 뿐만 아니라, 도 1에서 보는 바와 같이 각각의 CCFL에 인버터(A)가 일대일로 연결되어야 하므로 액정표시장치를 소형화 또는 박형화하는데 한계가 있고, 각각의 인버터(A)가 출력하는 전압파형의 동기가 다르기 때문에 인접하는 전원간의 강한 전기장이 형성되어 불필요한 전력이 소모되어 백라이트의 효율이 저하된다.However, it is very difficult to install a nickel electrode inside the glass tube, and as shown in FIG. 1, since the inverters A must be connected to each CCFL in one-to-one, there is a limit to miniaturization or thinning of the liquid crystal display device. Since the synchronization of the voltage waveforms outputted by (A) is different, a strong electric field is formed between adjacent power sources, unnecessary power is consumed, and the backlight efficiency is lowered.

또한 각 인버터(A)의 출력단에 내장된 트랜스포머(a)의 출력전압 및 주파수에 따라 램프휘도가 달라질 수 있어 조명부(1)의 휘도가 균일하지 못한 문제점이 발생하였다.In addition, since the lamp brightness may vary according to the output voltage and frequency of the transformer (a) built in the output terminal of each inverter (A), the brightness of the lighting unit 1 is not uniform.

한편 EEFL은 유리관을 봉합한 후 유리관 양단부의 외벽면에 외부전극을 설치하고 상기 외부전극에 의한 유리관내 전기장을 형성하여 기체방전시키는 구조이다.On the other hand, the EEFL is a structure in which an external electrode is installed on the outer wall surfaces of both ends of the glass tube after sealing the glass tube, and an electric field in the glass tube is formed by the external electrode to discharge gas.

이러한 EEFL은 상기 CCFL에 비하여 제작이 용이하고 램프의 수명이 길다는 장점이 이외에 도 2에서 보는 바와 같이 하나의 인버터(B)를 통하여 다수개의 EEFL을 병렬로 연결가능하므로 상기 CCFL에서와는 달리 조명부(2)의 휘도를 일정하게 할 수 있는 장점이 있다.Unlike the CCFL, the EEFL has an advantage that the EEFL is easier to manufacture and has a longer lamp life than the CCFL. In addition, as shown in FIG. 2, a plurality of EEFLs can be connected in parallel through one inverter B. ), There is an advantage that the luminance can be made constant.

그러나 EEFL은 CCFL에 비하여 전극의 길이가 길어 램프의 비발광영역이 넓고, 특히 EEFL은 유리 자체 유전율에만 의존하므로 유리관 내 2차전자의 발생율이 낮아 램프의 휘도와 효율이 낮다는 단점이 있었다.However, the EEFL has a longer electrode length than the CCFL, and thus the non-light emitting area of the lamp is wider. In particular, the EEFL depends on the dielectric constant of the glass itself.

또한 EEFL은 램프의 휘도를 증가시키기 위하여 전압을 높이면 램프 내부와 외부의 전압차가 심화되어 핀홀현상이 발생한다는 점이 문제점이 있었다.In addition, the EEFL has a problem in that when the voltage is increased to increase the brightness of the lamp, the voltage difference between the inside and the outside of the lamp deepens, causing pinhole phenomenon.

이에 본 고안에서는 상기한 문제점을 해결하기 위하여 창안된 것으로써, 본 발명의 목적은 조명부의 휘도를 균일하게 할 수 있다는 EEFL의 장점을 그대로 유지하는 한편 유리관의 낮은 유전율에 의존하던 종래의 방법에서 탈피하여 능동적으로 고효율 유전을 실현하고 2차전자 발생율이 높은 내부전극으로 전하들을 유도함으로써 형광램프의 휘도특성을 향상시키는 데 있다. Therefore, the present invention was devised to solve the above problems, and the object of the present invention is to break away from the conventional method which relies on the low dielectric constant of the glass tube while maintaining the advantages of the EEFL that the luminance of the lighting unit can be uniform. By actively realizing high-efficiency dielectric and inducing electric charges to internal electrodes with high secondary electron generation rate, the brightness characteristics of fluorescent lamps are improved.

이를 위한 본 발명의 구성은 유리관(10) 내부의 내부전극(20)과 이어진 1차외부전극(30)이 유리관(10) 외벽면에 밀착되는 형상으로 돌출되고, 상기 유리관(10) 외벽면으로 돌출되는 1차외부전극(30) 위에는 고유전율의 절연박막(40)으로 완전절연되며, 상기 절연박막(40) 위에는 외부전극(50)이 밀착되어 구성되는 것을 특징으로 한다. The configuration of the present invention for this purpose is to protrude in a shape that the primary electrode 30 connected to the inner electrode 20 in the glass tube 10 is in close contact with the outer wall surface of the glass tube 10, the outer wall surface of the glass tube 10 The first external electrode 30 protruding is completely insulated by an insulating thin film 40 having a high dielectric constant, and the external electrode 50 is in close contact with the insulating thin film 40.

이하 본 발명의 구성을 첨부된 도면을 참고하여 상세히 설명한다.Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

상기 유리관(10)은 그 내벽면에 형광물질이 도포되며 내부공간에는 수은, 아르곤, 네온 등의 혼합가스를 충전시킨다.The glass tube 10 is coated with a fluorescent material on the inner wall surface of the glass tube 10 is filled with a mixed gas such as mercury, argon, neon.

상기 내부전극(20)은 Ni, Cu 등의 도전성물질로 유리관(10)의 끝단 내부에 구성되는데, 상기 내부전극(20)의 형상은 표면적을 넓게 하기 위하여 중공컵 형상으로 하는 것이 바람직하다.The internal electrode 20 is formed inside the end of the glass tube 10 by a conductive material such as Ni, Cu, and the like, and the shape of the internal electrode 20 is preferably a hollow cup shape in order to increase the surface area.

상기 내부전극(20)과 이어진 1차외부전극(30)은 유리관(10) 외부로 돌출되어 유리관(10) 외벽면에 밀착되도록 구성하며, 상기 유리관(10) 외벽면에 밀착된 1차외부전극(30) 위에는 실리콘, 세라믹 등의 고유전율을 가진 절연박막(40)으로 완전절연시킨다.The primary external electrode 30 connected to the internal electrode 20 protrudes out of the glass tube 10 to be in close contact with the outer wall surface of the glass tube 10, and the primary external electrode in close contact with the outer wall surface of the glass tube 10. The insulating film 40 is completely insulated from the insulating thin film 40 having a high dielectric constant such as silicon or ceramic.

상기 2차외부전극(50)은 상기 절연박막(40) 위에 부착되는 구조로써 전원을 공급하는 리드선(60)과 연결된다. 이러한 2차외부전극(50)을 구성하는 방법은 구리나 알미늄 등의 금속테이프를 붙이는 테이핑방법 또는 유리관 양단부를 도금하는 금속도금방법이 있다.The secondary external electrode 50 has a structure attached to the insulating thin film 40 and is connected to a lead wire 60 for supplying power. The secondary external electrode 50 may be formed by a taping method of attaching a metal tape such as copper or aluminum, or a metal plating method of plating both ends of the glass tube.

이하, 상기와 같이 구성되는 본 발명의 작용을 살펴본다.Hereinafter, look at the operation of the present invention configured as described above.

리드선(60)을 통하여 본 발명에 따른 형광램프의 일측단에 전원이 공급되어 2차외부전극(50)에 전하가 인가되면 이에따라 고유전율을 가진 절연박막(40)에 의해 1차외부전극(30)에는 반대극성의 전하가 대전되며, 상기 1차외부전극(30)에 대전된 전하는 유리관(10) 내부의 내부전극(20)으로 직접 유도됨으로써 유리관 내부의 내부전극(20) 주변에 발생하는 2차전자의 양이 증대된다.When power is supplied to one end of the fluorescent lamp according to the present invention through the lead wire 60 and the electric charge is applied to the secondary external electrode 50, the primary external electrode 30 is formed by the insulating thin film 40 having a high dielectric constant. ) Is charged to the opposite polarity, and the charge charged on the primary external electrode 30 is induced directly to the internal electrode 20 inside the glass tube 10, thereby generating around the internal electrode 20 inside the glass tube 10. The amount of charge is increased.

상기와 같은 구성으로 절연박막의 높은 유전율에 의해 1차외부전극에 대전되는 전하를 유리관 내부의 내부전극으로 직접 유도되도록 하여, 종래의 유리관의 낮은 유전율에만 의존한 종래 EEFL에 비하여 유리관 내부의 2차전자의 발생율을 증대시킴으로써 형광램프의 휘도특성 및 발광효율을 높일 수 있다. 그리고 1차외부전극과 연결된 내부전극의 존재로 인해 램프 내부와 외부의 전압차를 줄일 수 있어 종래 EEFL에서 발생하던 핀홀현상을 방지할 수 있다.With the above structure, the electric charges charged to the primary external electrode are directly induced by the high dielectric constant of the insulating thin film to the internal electrode inside the glass tube, and thus the secondary inside the glass tube as compared to the conventional EEFL which relies only on the low dielectric constant of the conventional glass tube. By increasing the generation rate of electrons, the luminance characteristics and the luminous efficiency of the fluorescent lamp can be improved. In addition, the voltage difference between the inside and the outside of the lamp can be reduced due to the presence of the internal electrode connected to the primary external electrode, thereby preventing the pinhole phenomenon occurring in the conventional EEFL.

또한 높은 유전율을 가진 절연박막으로 인해 종래의 EEFL에서와 같이 외부전극을 길게 형성할 필요가 없어 종래 EEFL에 비해 전극길이를 약 40∼60% 정도 짧게 할 수 있으므로 발광영역이 증가하는 효과가 있다.In addition, the insulating thin film having a high dielectric constant does not need to form an external electrode as long as in the conventional EEFL, so that the electrode length can be shortened by about 40 to 60% compared to the conventional EEFL, thereby increasing the emission area.

도 1은 종래 CCFL을 이용한 액정표시장치용 백라이트의 구성도이며,1 is a block diagram of a backlight for a liquid crystal display device using a conventional CCFL,

도 2는 종래 EEFL을 이용한 액정표시장치용 백라이트의 구성도이며,2 is a configuration diagram of a backlight for a liquid crystal display device using a conventional EEFL;

도 3은 본 발명에 따른 일실시예를 보여주는 도면이다.3 is a view showing an embodiment according to the present invention.

<도면의 주요부분에 대한 설명><Description of main parts of drawing>

A, B : 인버터 1, 2 : 조명부A, B: Inverters 1, 2: Lighting unit

10 : 유리관 20 : 내부전극10: glass tube 20: internal electrode

30 : 1차외부전극 40 : 절연박막30: primary external electrode 40: insulating thin film

50 : 2차외부전극50: secondary external electrode

Claims (3)

형광램프의 양단에 구성되는 전극구조에 있어서,In the electrode structure formed at both ends of the fluorescent lamp, 유리관(10) 내부의 내부전극(20)과 이어진 1차외부전극(30)이 유리관(10) 외벽면에 밀착되는 형상으로 돌출되고, 상기 유리관(10) 외벽면으로 돌출되는 1차외부전극(30) 위에는 고유전율의 절연박막(40)으로 완전절연되며, 상기 절연박막(40) 위에는 외부전극(50)이 밀착되어 구성되는 것을 특징으로 하는 절연박막을 이용한 형광램프의 전극구조.The primary external electrode 30, which is connected to the internal electrode 20 inside the glass tube 10, protrudes to be in close contact with the outer wall surface of the glass tube 10, and protrudes to the outer wall surface of the glass tube 10. 30) The electrode structure of the fluorescent lamp using an insulating thin film, which is completely insulated by a high dielectric constant insulating film (40), the external electrode 50 is in close contact with the insulating thin film (40). 제 1항에 있어서,The method of claim 1, 상기 유리관(10) 내부의 내부전극(20)은 중공컵 형상으로 하는 것을 특징으로 하는 절연박막을 이용한 형광램프의 전극구조.The internal electrode 20 of the glass tube 10 is an electrode structure of a fluorescent lamp using an insulating thin film, characterized in that the hollow cup shape. 제 1항에 있어서,The method of claim 1, 상기 절연박막(40)은 고유전율을 가지는 실리콘 또는 세라믹 등으로 구성되는 것을 특징으로 하는 절연박막을 이용한 형광램프의 전극구조.The insulating thin film 40 is an electrode structure of a fluorescent lamp using an insulating thin film, characterized in that composed of silicon or ceramic having a high dielectric constant.
KR1020040042815A 2004-06-11 2004-06-11 An electroide structure of fiuorescent lamp used an insulated film KR20050117662A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100930646B1 (en) * 2008-06-24 2009-12-09 우리이티아이 주식회사 External electrode fluorescent lamp and liquid crystal display device using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100930646B1 (en) * 2008-06-24 2009-12-09 우리이티아이 주식회사 External electrode fluorescent lamp and liquid crystal display device using the same

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