KR100575112B1 - an electroide structure of a External Electroide Fiuorescent Lamp - Google Patents

an electroide structure of a External Electroide Fiuorescent Lamp Download PDF

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KR100575112B1
KR100575112B1 KR1020040033271A KR20040033271A KR100575112B1 KR 100575112 B1 KR100575112 B1 KR 100575112B1 KR 1020040033271 A KR1020040033271 A KR 1020040033271A KR 20040033271 A KR20040033271 A KR 20040033271A KR 100575112 B1 KR100575112 B1 KR 100575112B1
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electrode
glass tube
eefl
lamp
external electrode
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KR1020040033271A
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KR20040052877A (en
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이성률
황일근
최성호
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주식회사 제이제이텍
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/08—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for supporting tubular fluorescent lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/02—Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp

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Abstract

본 발명은 액정표시장치용 백라이트 등에 사용되는 형광램프의 전극구조에 관한 것으로써, 보다 상세하게는 절연체가 코팅된 내부전극을 가지는 외부전극형광램프의 전극구조에 관한 것이다.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, to an electrode structure of an external electrode fluorescent lamp having an internal electrode coated with an insulator.

이를 위한 본 발명의 구성은 밀봉된 유리관의 끝단 외벽면에는 외부전극이 구성되고 유리관 끝단 내부에는 내부전극이 구성되는 전극구조로써, 상기 내부전극 표면에는 절연체 코팅층이 형성되는 것을 특징으로 한다.The configuration of the present invention for this purpose is an electrode structure in which the outer electrode is configured on the outer wall surface of the end of the sealed glass tube and the inner electrode is formed inside the glass tube end, the insulator coating layer is formed on the inner electrode surface.

상기와 같은 구성으로써 조명부의 휘도를 균일하게 할 수 있다는 EEFL의 장점을 그대로 유지하는 동시에 종래의 EEFL보다 전력소모를 감소시킬 수 있다.With the above configuration, while maintaining the advantages of the EEFL that the luminance of the lighting unit can be uniform, it is possible to reduce the power consumption than the conventional EEFL.

또한 외부전극과 램프내부 간의 전위차를 낮춤으로써 핀홀현상의 발생을 방지하는 있는 효과가 있다.In addition, there is an effect of preventing the occurrence of pinhole phenomenon by lowering the potential difference between the external electrode and the inside of the lamp.

또한 외부전극 뿐만 아니라 내부전극을 통하여 방전시킴으로써 종래의 EEFL에 비하여 램프의 휘도와 효율을 향상시키는 효과가 있다.In addition, the discharge through the internal electrode as well as the external electrode has the effect of improving the brightness and efficiency of the lamp compared to the conventional EEFL.

형광램프, CCFL, EEFL, 알루미나, 휘도, 핀홀현상Fluorescent Lamp, CCFL, EEFL, Alumina, Luminance, Pinhole

Description

외부전극형광램프의 전극구조{an electroide structure of a External Electroide Fiuorescent Lamp} An electroide structure of a External Electroide Fiuorescent Lamp             

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 block diagram of a backlight for a liquid crystal display device using a conventional EEFL,

도 3은 본 발명 제1실시예를 보여주는 도면이며,3 is a view showing a first embodiment of the present invention,

도 4는 본 발명 제2실시예를 보여주는 도면이며,4 is a view showing a second embodiment of the present invention,

도 5는 본 발명 제1실시예와 기존 EEFL에 동일한 전류를 인가한 경우에 램프전압을 비교한 그래프이다.5 is a graph comparing lamp voltages when the same current is applied to the first embodiment of the present invention and the existing EEFL.

<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 : 외부전극10: glass tube 20: external electrode

30 : 리드선 40 : 내부전극30: lead wire 40: internal electrode

41 : 지지체 42 : 절연체 코팅층41 support body 42 insulator coating layer

50 : 비드글래스(Bead Glass)50: Bead Glass

본 발명은 액정표시장치용 백라이트 등에 사용되는 형광램프의 전극구조에 관한 것으로써, 보다 상세하게는 절연체가 코팅된 내부전극을 가지는 외부전극형광램프의 전극구조에 관한 것이다.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, to an electrode structure of an external electrode fluorescent lamp having an internal electrode coated with an insulator.

종래의 액정표시장치용 백라이트에 사용되는 형광램프는 크게 냉음극 형광램프(Cold Cathode Fiuorescent Lamp, 이하 'CCFL'이라 함)와 외부전극 형광램프(External Electrode Fiuorescent 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 인버터가 일대일로 연결되어야 하므로 액정표시장치의 cost가 올라가고 소형화 또는 박형화하는데 한계가 발생하였다.However, it is very difficult to install the nickel electrode inside the glass tube, and as shown in FIG. 1, the inverter has to be connected to each CCFL in one-to-one, thus increasing the cost of the liquid crystal display and minimizing or reducing the thickness.

또한 각 인버터의 출력단에 내장된 트랜스포머의 출력전압 및 주파수에 따라 램프휘도가 달라질 수 있어 조명부의 휘도가 균일하지 못한 문제점이 발생하였다.In addition, the lamp brightness may vary according to the output voltage and frequency of the transformer built in the output terminal of each inverter, which causes a problem that the brightness of the lighting unit 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 인버터를 통하여 다수개의 EEFL을 병렬로 연결가능하므로 상기 CCFL에서와는 달리 조명부의 휘도를 일정하게 할 수 있는 장점이 있다.Unlike the CCFL, the EEFL has the advantage of being easier to manufacture and longer lamp life than the CCFL. In addition, as shown in FIG. There is an advantage to this.

그러나 EEFL은 외부전극과 유리관이 쉽게 분리될 우려가 있을 뿐만 아니라 램프의 휘도와 효율이 낮다는 점, 그리고 램프의 휘도를 높이기 위해 전류를 높이면 외부전극과 램프내부간의 전위차가 심화되어 핀홀현상이 발생한다는 점이 문제점으로 작용하여 백라이트 광원이나 조명용 광원으로 사용하는데 한계가 있었다.However, the EEFL may not only easily separate the external electrode and the glass tube, but also lower the brightness and efficiency of the lamp, and increase the current to increase the brightness of the lamp. The problem is that there is a limit to use as a backlight light source or an illumination light source.

이에 본 고안에서는 상기한 문제점을 해결하기 위하여 창안된 것으로써, 본 발명의 목적은 조명부의 휘도를 균일하게 할 수 있다는 EEFL의 장점을 그대로 유지하는 한편 절연체가 코팅된 내부전극을 설치함으로써 램프의 휘도를 높이고, 외부전극과 램프내부간의 전위차를 줄여 핀홀현상을 방지할 수 있는 외부전극형광램프의 전극구조를 제공하는데 있다.
Therefore, the present invention was devised to solve the above problems, and the object of the present invention is to maintain the advantages of the EEFL that the luminance of the lighting unit can be uniform, while maintaining the advantages of the insulator coated internal electrode, thereby providing the luminance of the lamp. It is to provide an electrode structure of an external electrode fluorescent lamp that can increase the, and to prevent the pinhole phenomenon by reducing the potential difference between the external electrode and the inside of the lamp.

이를 위한 본 발명의 구성은 밀봉된 유리관(10)의 끝단 외벽면에는 외부전극(20)이 구성되고 유리관 끝단 내부에는 내부전극(40)이 구성되는 전극구조로써, 상기 내부전극(40) 표면에는 절연체 코팅층(42)이 형성된 것을 특징으로 한다.The configuration of the present invention for this purpose is an electrode structure in which the outer electrode 20 is configured on the outer wall surface of the end of the sealed glass tube 10 and the inner electrode 40 is formed inside the glass tube end, the surface of the inner electrode 40 The insulator coating layer 42 is formed.

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 내부공간에 수은, 아르곤, 네온 등의 혼합가스를 충전시켜 밀봉된다.The glass tube 10 is coated with a fluorescent material on its inner wall surface and sealed by filling a mixed gas such as mercury, argon and neon in the inner space.

상기 외부전극(20)은 밀봉된 유리관(10)의 끝단 외벽면에 부착되는 구조로써 전원을 공급하는 리드선(30)과 연결된다. 이러한 외부전극(20)을 구성하는 방법은 구리나 알미늄 등의 금속테이프를 붙이는 테이핑방법 또는 유리관 양단부를 도금하는 금속도금방법이 있다.The external electrode 20 is attached to the outer wall surface of the end of the sealed glass tube 10 and is connected to the lead wire 30 for supplying power. The external electrode 20 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.

한편 상기 리드선(30)은 외부전극(20)과 내부전극(40)의 전원연결을 위해 유리관 외측으로 인출되는데, 유리와 열팽창율이 비슷한 듀멧(dumet) 와이어를 사용하는 것이 바람직하다.Meanwhile, the lead wire 30 is drawn out to the outside of the glass tube for power connection between the external electrode 20 and the internal electrode 40. It is preferable to use a dumet wire having a similar thermal expansion coefficient to that of the glass.

상기 내부전극(40)은 상기 리드선(30)과 연결된 지지체(41)를 유리관(10) 외부에서 내부로 연장시키고, 상기 유리관 내부로 연장된 지지체(41)의 표면은 절연체 코팅층(42)으로 구성된다. The internal electrode 40 extends the support 41 connected to the lead wire 30 from the outside of the glass tube 10 to the inside, and the surface of the support 41 extending into the glass tube is composed of an insulator coating layer 42. do.

상기 지지체(41)는 코바르(Kovar), 몰리(Moli) 등의 소재로 구성할 수 있으며, 도 4에 나타난 본 발명 제2실시예에서 보는 바와 같이 상기 리드선(30)을 연장하여 구성할 수도 있다.The support 41 may be made of a material such as Kovar, Moli, or the like, and may be configured by extending the lead wire 30 as shown in the second embodiment of the present invention shown in FIG. have.

상기 유리관(10) 내부로 연장되는 지지체(41)의 길이는 5mm∼20mm 정도이며, 이 부분을 절연체 중 특히 알루미나(Al2O3)로 코팅하는 방법은 코팅할 부분을 알루미나(Al2O3) 분산용액에 딥핑(dipping)한 후 꺼내어 100℃∼300℃의 온도로 10∼20분간 가열함으로써 코팅하게 된다. 여기서, 내부전극을 알루미나로 코팅하는 이유는 알루미나가 절연체이면서 코팅 형성이 용이하기 때문이다.The length of the support body 41 extending into the glass tube 10 is about 5 mm to 20 mm, and the method of coating this portion with in particular alumina (Al 2 O 3 ) in the insulator is performed on the portion to be coated with alumina (Al 2 O 3). After dipping into the dispersion solution, it is taken out and coated by heating at a temperature of 100 ° C to 300 ° C for 10 to 20 minutes. The reason why the internal electrode is coated with alumina is because alumina is an insulator and easy to form a coating.

유리관(10) 내부에 상기 내부전극(40)을 설치하면서 유리관(10)은 밀봉하여야 하는데 이는 지지체(41)의 일측에 비드글래스(50)를 구성하여 상기 유리관(10)의 양단과 봉합하는 방법을 사용하는 것이 용이하다.The glass tube 10 should be sealed while the inner electrode 40 is installed inside the glass tube 10, which forms a bead glass 50 on one side of the support 41 to seal the both ends of the glass tube 10. It is easy to use.

한편 상기 절연체 코팅층을 비드글래스(50)와 연결되는 glass층으로 구성하는 것도 절연체 코팅층(42)을 형성하는데 용이한 방법이다.On the other hand, the insulator coating layer is also composed of a glass layer connected to the bead glass 50 is an easy way to form the insulator coating layer 42.

상기와 같이 구성된 본 발명 제1실시예와 기존 EEFL에 동일한 전류를 인가한 경우에 램프전압을 비교한 그래프가 도 5에 나타나 있다. 이를 살펴보면 동일한 전류를 인가하였을때 기존 EEFL보다 약 20%정도의 전압강하가 발생하는 것을 확인하였다. FIG. 5 is a graph comparing the lamp voltage when the same current is applied to the first embodiment of the present invention and the existing EEFL configured as described above. As a result, when the same current is applied, the voltage drop of about 20% occurs than the existing EEFL.

상기와 같은 구성으로써 조명부의 휘도를 균일하게 할 수 있다는 EEFL의 장점을 그대로 유지하는 동시에 종래의 EEFL보다 전력소모를 감소시킬 수 있다.With the above configuration, while maintaining the advantages of the EEFL that the luminance of the lighting unit can be uniform, it is possible to reduce the power consumption than the conventional EEFL.

또한 외부전극과 램프내부 간의 전위차를 낮춤으로써 핀홀현상의 발생을 방지하는 있는 효과가 있다.In addition, there is an effect of preventing the occurrence of pinhole phenomenon by lowering the potential difference between the external electrode and the inside of the lamp.

또한 외부전극 뿐만 아니라 내부전극을 통하여 방전시킴으로써 종래의 EEFL에 비하여 램프의 휘도와 효율을 향상시키는 효과가 있다.In addition, the discharge through the internal electrode as well as the external electrode has the effect of improving the brightness and efficiency of the lamp compared to the conventional EEFL.

Claims (3)

밀봉된 유리관(10)의 끝단 외벽면에 면접촉하는 외부전극(20)과;An external electrode 20 in surface contact with the outer wall surface of the end of the sealed glass tube 10; 유리관 끝단 내부에는 유리관(10) 외부에서 내부로 연장시킨 지지체(41) 표면에 절연체 코팅층(42)을 가지는 내부전극(40)과;An inner electrode 40 having an insulator coating layer 42 on a surface of the support 41 extending from the outside of the glass tube 10 to the inside of the glass tube end; 상기 외부전극(20)과 내부전극(40)의 전원연결을 위해 유리관 외측으로 인출된 리드선(30)을 포함하여 구성되는 것을 특징으로 하는 외부전극형광램프의 전극구조.Electrode structure of the external electrode fluorescent lamp, characterized in that it comprises a lead wire (30) drawn out of the glass tube for the power connection of the external electrode (20) and the internal electrode (40). 제 1항에 있어서,The method of claim 1, 상기 지지체(41)는 상기 리드선(30)이 연장되어 구성되는 것을 특징으로 하는 외부전극형광램프의 전극구조.The support 41 has an electrode structure of an external electrode fluorescent lamp, characterized in that the lead wire 30 is extended. 제 1항에 있어서,The method of claim 1, 상기 절연체 코팅층(42)은 알루미나 코팅층 또는 glass층으로 구성되는 것을 특징으로 하는 외부전극형광램프의 전극구조.The insulator coating layer 42 is an electrode structure of an external electrode fluorescent lamp, characterized in that consisting of an alumina coating layer or a glass layer.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101288786B1 (en) 2007-08-24 2013-07-29 조정열 Method for widening electrode sections of external electrode fluorescent lamp
KR101349779B1 (en) * 2007-06-27 2014-01-16 엘지디스플레이 주식회사 Liquid crystal display device and back light unit thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101157289B1 (en) * 2005-06-30 2012-06-15 엘지디스플레이 주식회사 Backlight assembly and liquid crystal display having the same
KR100725763B1 (en) * 2005-12-05 2007-06-08 주식회사 신안유브이 Electric field ultraviolet rays lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09129187A (en) * 1995-11-02 1997-05-16 Mitsubishi Electric Corp Excimer light emitting tube
US5668443A (en) 1994-07-21 1997-09-16 Mitsubishi Denki Kabushiki Kaisha Display fluorescent lamp and display device
KR20030086133A (en) * 2002-05-03 2003-11-07 주식회사 지엘디 External electrode florescent lamp
KR20040009604A (en) * 2002-07-24 2004-01-31 엘지.필립스 엘시디 주식회사 Hybrid fluorescent lamp
JP2004127539A (en) 2002-09-30 2004-04-22 Harison Toshiba Lighting Corp Fluorescent lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5668443A (en) 1994-07-21 1997-09-16 Mitsubishi Denki Kabushiki Kaisha Display fluorescent lamp and display device
JPH09129187A (en) * 1995-11-02 1997-05-16 Mitsubishi Electric Corp Excimer light emitting tube
KR20030086133A (en) * 2002-05-03 2003-11-07 주식회사 지엘디 External electrode florescent lamp
KR20040009604A (en) * 2002-07-24 2004-01-31 엘지.필립스 엘시디 주식회사 Hybrid fluorescent lamp
JP2004127539A (en) 2002-09-30 2004-04-22 Harison Toshiba Lighting Corp Fluorescent lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101349779B1 (en) * 2007-06-27 2014-01-16 엘지디스플레이 주식회사 Liquid crystal display device and back light unit thereof
KR101288786B1 (en) 2007-08-24 2013-07-29 조정열 Method for widening electrode sections of external electrode fluorescent lamp

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