KR100433804B1 - Device for driving the fluorescent lamp with external electrodes of LCD - Google Patents

Device for driving the fluorescent lamp with external electrodes of LCD Download PDF

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Publication number
KR100433804B1
KR100433804B1 KR10-2001-0068928A KR20010068928A KR100433804B1 KR 100433804 B1 KR100433804 B1 KR 100433804B1 KR 20010068928 A KR20010068928 A KR 20010068928A KR 100433804 B1 KR100433804 B1 KR 100433804B1
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South Korea
Prior art keywords
fluorescent lamp
emitting fluorescent
circuit
surface emitting
lighting
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KR10-2001-0068928A
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Korean (ko)
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KR20030037842A (en
Inventor
허정욱
임성규
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주식회사 지엘디
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Priority to US10/481,110 priority Critical patent/US7084583B2/en
Priority to KR10-2001-0068928A priority patent/KR100433804B1/en
Application filed by 주식회사 지엘디 filed Critical 주식회사 지엘디
Priority to CN200510064317A priority patent/CN100584141C/en
Priority to CNB028127099A priority patent/CN1222816C/en
Priority to AT02741493T priority patent/ATE428953T1/en
Priority to DE60231983T priority patent/DE60231983D1/en
Priority to ES02741493T priority patent/ES2326160T3/en
Priority to EP02741493A priority patent/EP1402311B1/en
Priority to PCT/KR2002/001213 priority patent/WO2003001550A2/en
Priority to CNB2005100643168A priority patent/CN100363819C/en
Priority to JP2003507842A priority patent/JP3968344B2/en
Publication of KR20030037842A publication Critical patent/KR20030037842A/en
Application granted granted Critical
Publication of KR100433804B1 publication Critical patent/KR100433804B1/en
Priority to US11/342,448 priority patent/US7327093B2/en
Priority to JP2006198594A priority patent/JP2006344605A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

본 발명은 엘시디용 면발광 형광램프 구동장치에 관한 것으로서, 더욱 구체적으로는 외부전극으로서 주전극과 보조전극을 가진 엘시디용 면발광 형광램프에 하전입자 생성을 위한 초기 점등 전압을 인가하고 하전입자 생성후 입자들이 소멸되기 전에 점등 유지용 전압을 인가하여 면발광 형광램프의 점등을 유지하기 위한 엘시디용 면발광 형광램프 구동장치에 관한 것이다.The present invention relates to a surface emitting fluorescent lamp driving device for an LCD, and more specifically, to the surface emitting fluorescent lamp for LCD having a main electrode and an auxiliary electrode as an external electrode, an initial lighting voltage for generating charged particles is applied, and a charged particle is generated. The present invention relates to a surface emitting fluorescent lamp driving device for an LCD for maintaining lighting of a surface emitting fluorescent lamp by applying a lighting sustain voltage before the particles disappear.

본 발명의 엘시디용 면발광 형광램프 구동장치는, 엘시디 컨트롤러(60)로부터의 제어신호에 따라서 외부전극 면발광 형광램프(50)를 점등시키기 위한 메인컨트롤러(10), 상기 메인컨트롤러(10)로부터의 제어신호에 의하여 외부전극 면발광 형광램프(50)에 초기하전입자를 생성하기 위하여 보조전극(5)에 전원을 공급하는 프라이밍회로(20)와, 상기 프라이밍회로(20)에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극(3)에 전원을 공급하는 점등유지회로(30), 및 외부전극 면발광 형광램프(50)에 흐르는 전류를 검출하고 이것을 전압으로 변환하여 상기 메인컨트롤러(10)에 입력하여 점등유지회로(30)에 의한 밝기조정용 인가전압을 조정하기 위한 피드백회로(40)를 포함하는 것을 특징으로 한다.The surface emitting fluorescent lamp driving apparatus for an LCD of the present invention includes a main controller 10 for lighting the external electrode surface emitting fluorescent lamp 50 according to a control signal from the LCD controller 60, and the main controller 10 from the main controller 10. The priming circuit 20 supplies power to the auxiliary electrode 5 in order to generate initial charged particles in the external electrode surface emitting fluorescent lamp 50 according to the control signal of the low voltage generated by the priming circuit 20. Detects the current flowing through the lighting sustain circuit 30 for supplying power to the main electrode 3 and the external electrode surface emitting fluorescent lamp 50 to apply the sustaining voltage using all the particles, and converts it into voltage to convert the voltage into the main circuit. It is characterized in that it comprises a feedback circuit 40 for inputting the controller 10 for adjusting the applied voltage for adjusting the brightness by the lighting holding circuit 30.

Description

엘시디용 면발광 형광램프 구동장치{Device for driving the fluorescent lamp with external electrodes of LCD}Device for driving the fluorescent lamp with external electrodes of LCD}

본 발명은 엘시디용 면발광 형광램프 구동장치에 관한 것으로서, 더욱 구체적으로는 외부전극으로서 주전극과 보조전극을 가진 엘시디용 면발광 형광램프에 하전입자 생성을 위한 초기 점등 전압을 인가하고 하전입자 생성후 입자들이 소멸되기 전에 점등 유지용 전압을 인가하여 면발광 형광램프의 점등을 유지하기 위한 엘시디용 면발광 형광램프 구동장치에 관한 것이다.The present invention relates to a surface emitting fluorescent lamp driving device for an LCD, and more specifically, to the surface emitting fluorescent lamp for LCD having a main electrode and an auxiliary electrode as an external electrode, an initial lighting voltage for generating charged particles is applied, and a charged particle is generated. The present invention relates to a surface emitting fluorescent lamp driving device for an LCD for maintaining lighting of a surface emitting fluorescent lamp by applying a lighting sustain voltage before the particles disappear.

LCD 셀은 자체적으로 발광하지 못하기 때문에 광원으로서 백라이트를 사용하고 있으며, 종래에는 주로 음극선 형광램프(CCFL)를 사용하고 있다. 이러한 음극선 형광램프의 구동을 위하여 사용되는 구동장치는 DC를 AC로 변환해 주는 인버터부와 CCFL의 밝기를 조절해 주기 위한 DC/DC 컨버터, 즉, 2개의 전력 변환기를 사용하여 음극선 형광램프을 구동하고 휘도를 조절하였다.LCD cells use a backlight as a light source because they do not emit light by themselves, and conventionally, a cathode ray fluorescent lamp (CCFL) is mainly used. The driving device used to drive the cathode fluorescent lamp uses a inverter unit for converting DC to AC and a DC / DC converter for controlling the brightness of the CCFL, that is, two power converters to drive the cathode fluorescent lamp. The brightness was adjusted.

그러나 종래 음극선 형광램프와 구동장치는 점점 소형화되는 LCD에 적합하지 않기 때문에 본 출원인에 의하여 면발광 형광램프가 개발되어 제시되어 있다. 상기한 면발광 형광램프는 직하형 방식으로서 넓은 면적에 균일하게 광을 조사할 수 있기 때문에 고휘도, 고휘도균일도를 제공할 수 있는 이점이 있다. 상기 면발광 형광램프는 설펀틴(serpentine) 형상을 가지는 램프본체의 양단부에 한 쌍의 주전극이 형성되어 있으며, 그 주전극을 통하여 전원이 인가되어 면발광 형광램프가 점등되도록 구성되어 있다.However, since the conventional cathode ray fluorescent lamp and the driving device are not suitable for the increasingly smaller LCD, the surface-emitting fluorescent lamp has been developed and proposed by the present applicant. The surface-emitting fluorescent lamp is a direct type method, and since it can irradiate light uniformly over a large area, there is an advantage of providing high brightness and high brightness uniformity. The surface emitting fluorescent lamp has a pair of main electrodes formed at both ends of a lamp body having a sulfentine shape, and the surface emitting fluorescent lamp is turned on by applying power through the main electrode.

그러나 상기와 같은 면발광 형광램프는 종래 음극선 형광램프에 사용되던 구동장치(인버터와 컨버터)를 사용하고 있으나, 면발광 형광램프는 종래 형광램프보다 그 형상적인 특징에 의하여 전체 길이가 길어지기 때문에 초기점등시에 매우 높은 방전전압이 필요하게 되며, 이에 따라서 면발광 형광램프의 구동을 위하여 구동장치의 부피가 증가하게 되므로 소형, 박형화에 역행되는 문제점이 있었다.However, the surface emitting fluorescent lamps described above use the driving devices (inverters and converters) used in the conventional cathode fluorescent lamps. However, the surface emitting fluorescent lamps have a longer overall length due to their shape than the conventional fluorescent lamps. Very high discharge voltage is required at the time of lighting, thereby increasing the volume of the driving device for driving the surface emitting fluorescent lamp.

이러한 문제점을 해결하기 위하여 주전극과 보조전극을 동시에 구비한 면발광 형광램프가 개발, 출원되어 있다. 도 1은 본 출원인에 의하여 기출원된 면발광 형광램프(1)의 구조를 나타내는 평면도로서, 표면으로부터 소정거리 이내에서 휘도균일도를 최대화시키기 위한 소정의 단면을 가지며 설펀틴형상으로 구성되는 소정 두께의 램프상판과, 평판 구조를 가지며 상기 램프상판과 상하 결합되어 상호연통되는 채널을 이루도록 구성되는 소정두께의 램프하판과, 상기 램프상판의 양측단부의 표면상에 외부전극으로서 각각 주전극(3)과 보조전극(5)을 포함하고 있다.In order to solve this problem, a surface emitting fluorescent lamp having both a main electrode and an auxiliary electrode has been developed and applied. 1 is a plan view showing the structure of the surface-emitting fluorescent lamp 1 previously filed by the present applicant, and has a predetermined cross section for maximizing luminance uniformity within a predetermined distance from the surface, and has a predetermined thickness composed of a sulfentin shape. A lamp upper plate, a lower plate of a predetermined thickness configured to have a flat plate structure, and to be coupled to the upper and lower surfaces of the lamp upper plate, and to communicate with each other, and the main electrode 3 as an external electrode on the surface of both ends of the lamp upper plate. The auxiliary electrode 5 is included.

주전극(3)과 보조전극(5)에는 서로 다른 성질을 가진 전원(7,7a)이 공급되어야 한다. 주전극(3)은 면적이 넓은 형태의 도전체로 구성되며, 보조전극(5)은 가늘고 긴 형태의 도전체로 구성되어 있다. 특히 보조전극(5)은 면발광 형광램프(1)의 표면에 다양한 형태로 설치될 수 있다.The main electrodes 3 and the auxiliary electrodes 5 should be supplied with powers 7 and 7a having different properties. The main electrode 3 is composed of a conductor having a large area, and the auxiliary electrode 5 is composed of an elongated conductor. In particular, the auxiliary electrode 5 may be installed in various forms on the surface of the surface emitting fluorescent lamp (1).

상기 주전극(3)은 면발광 형광램프(1)의 점등을 유지하기 위한 것이며, 보조전극(5)은 고전압을 인가하지 않고 저전압을 이용하여 점등시킬 수 있도록 하기 위하여 소정시간 동안만 작동되어서 하전입자를 면발광 형광램프의 내부에 생성시킨다. 따라서 상기와 같이 주전극(3)과 보조전극(5)을 가지는 면발광 형광램프(1)에 전원을 공급하기 위한 새로운 형태의 면발광 형광램프 구동장치가 요구되고 있는 형편인 것이다.The main electrode 3 is intended to maintain the lighting of the surface emitting fluorescent lamp 1, and the auxiliary electrode 5 is operated only for a predetermined time in order to be turned on using a low voltage without applying a high voltage. All particles are generated inside the surface emitting fluorescent lamp. Therefore, there is a need for a new type of surface emitting fluorescent lamp driving device for supplying power to the surface emitting fluorescent lamp 1 having the main electrode 3 and the auxiliary electrode 5 as described above.

본 발명은 상기한 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 주전극과 보조전극을 가진 엘시디용 면발광 형광램프에 하전입자 생성을 위한 초기 점등 전압을 인가하고 하전입자 생성후 입자들이 소멸되기 전에 방전 유지용 전압을 인가하여 면발광 형광램프의 점등을 유지하기 위한 엘시디용 면발광 형광램프 구동장치를 제공하는데 있다.The present invention is to solve the above problems, an object of the present invention is to apply an initial lighting voltage for the generation of charged particles to the surface-emitting fluorescent lamp for LCD having the main electrode and the auxiliary electrode and the particles disappear after generation of the charged particles The present invention provides a surface emitting fluorescent lamp driving apparatus for an LCD for maintaining lighting of a surface emitting fluorescent lamp by applying a discharge holding voltage.

본 발명의 다른 목적은 저전압에서도 안정적으로 작동되며, 초기점등시의 고전압으로 인한 트랜스포머의 지속적인 스트레스와 스위칭소자의 손실을 감소시킬 수 있는 주전극과 보조전극을 구비한 면발광 형광램프를 제어하는 엘시디용 면발광 형광램프 구동장치를 제공하는데 있다.Another object of the present invention is to operate stably at low voltage, and to control the surface-emitting fluorescent lamp having a main electrode and an auxiliary electrode that can reduce the constant stress of the transformer and the loss of the switching element due to the high voltage during the initial lighting The present invention provides a surface emitting fluorescent lamp driving device.

도 1은 외부전극을 가진 면발광 형광램프의 구조를 나타내는 평면도,1 is a plan view showing the structure of a surface-emitting fluorescent lamp having an external electrode,

도 2는 본 발명에 의한 면발광 형광램프 구동장치의 일실시예의 블럭도,2 is a block diagram of an embodiment of a surface emitting fluorescent lamp driving apparatus according to the present invention;

도 3은 본 발명에 의한 면발광 형광램프 구동장치의 다른실시예의 블럭도,3 is a block diagram of another embodiment of a surface emitting fluorescent lamp driving apparatus according to the present invention;

도 4는 도 2의 면발광 형광램프 구동장치의 상세회로도,4 is a detailed circuit diagram of the surface emitting fluorescent lamp driving device of FIG.

도 5는 도 3의 면발광 형광램프 구동장치의 상세회로도,5 is a detailed circuit diagram of the surface emitting fluorescent lamp driving device of FIG.

도 6은 본 발명의 면발광 형광램프 구동장치의 작동상태 흐름도.Figure 6 is a flow diagram of the operation state of the surface-emitting fluorescent lamp driving apparatus of the present invention.

※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※

1 : 면발광형광램프, 3 : 주전극1: surface emitting fluorescent lamp, 3: main electrode

5 : 보조전극 7,7a: 전원5: auxiliary electrode 7,7a: power supply

10: 메인컨트롤러 20: 프라이밍회로10: main controller 20: priming circuit

30: 점등유지회로 40: 피드백회로30: lighting holding circuit 40: feedback circuit

50: 외부전극 면발광형광램프 60: 엘시디컨트롤러50: external electrode surface light emitting fluorescent lamp 60: LCD controller

본 발명의 엘시디용 면발광 형광램프 구동장치는, 주전극과 보조전극을 구비한 엘시디용 면발광 형광램프에 전원을 공급하기 위한 구동장치에 있어서, 엘시디 컨트롤러로부터의 제어신호에 따라서 외부전극 면발광 형광램프를 점등시키기 위한 메인컨트롤러, 상기 메인컨트롤러로부터의 제어신호에 의하여 외부전극 면발광 형광램프에 초기하전입자를 생성하기 위하여 보조전극에 전원을 공급하는 프라이밍회로와, 상기 프라이밍회로에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극에 전원을 공급하는 점등유지회로 및 외부전극 면발광 형광램프에 흐르는 전류를 검출하고 이것을 전압으로 변환하여 상기 메인컨트롤러에 입력하여 점등유지회로에 의한 밝기조정용 인가전압을 조정하기 위한 피드백회로를 포함하는 것을 특징으로 한다.The surface emitting fluorescent lamp driving device for an LCD of the present invention is a driving device for supplying power to the surface emitting fluorescent lamp for an LCD having a main electrode and an auxiliary electrode, the surface emitting of external electrodes according to a control signal from the LCD controller. A main controller for turning on a fluorescent lamp, a priming circuit for supplying power to an auxiliary electrode to generate initial charged particles in an external electrode surface emitting fluorescent lamp by a control signal from the main controller, and a priming circuit generated by the priming circuit. It detects the current flowing through the lighting sustaining circuit and the external electrode surface emitting fluorescent lamp to supply power to the main electrode by using the charged particles, converts it into voltage and inputs it to the main controller, Comprising a feedback circuit for adjusting the applied voltage for brightness adjustment It characterized.

본 발명의 다른 특징에 의하면, 상기 구동장치는 면발광 형광램프에 흐르는 전류를 검출하고 이것을 전압으로 변환하여 상기 메인컨트롤러에 입력하여 점등유지회로에 의한 인가전압을 조정하기 위한 피드백회로를 더 포함한다.According to another feature of the present invention, the driving device further includes a feedback circuit for detecting a current flowing in the surface emitting fluorescent lamp, converting it into a voltage, inputting it to the main controller, and adjusting an applied voltage by a lighting sustain circuit. .

이하 첨부된 도면을 참고하여 본 발명의 엘시디용 면발광 형광램프 구동장치를 상세히 설명하면 다음과 같다.Hereinafter, a surface emitting fluorescent lamp driving apparatus for an LCD of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 구동장치의 일실시예의 블럭도로서, 상위제어부인 엘시디 컨트롤러(60)로부터의 제어신호에 따라서 외부전극 면발광 형광램프(50)를 점등시키기 위한 메인컨트롤러(10), 상기 메인컨트롤러(10)로부터의 제어신호에 의하여 외부전극 면발광 형광램프(50)에 초기하전입자를 생성하기 위하여 보조전극(5)에 전원을 공급하는 프라이밍회로(20)와, 상기 프라이밍회로(20)에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극(3)에 전원을 공급하는 점등유지회로(30)를 포함하고 있다.2 is a block diagram of an exemplary embodiment of the driving apparatus of the present invention, in which a main controller 10 for lighting an external electrode surface emitting fluorescent lamp 50 in accordance with a control signal from an LCD controller 60, which is an upper controller, is shown. A priming circuit 20 for supplying power to the auxiliary electrode 5 to generate initial charged particles in the external electrode surface emitting fluorescent lamp 50 according to a control signal from the main controller 10, and the priming circuit 20. And a sustaining circuit 30 for supplying power to the main electrode 3 so as to apply a sustaining voltage by using the charged particles generated by the?).

상기에서 외부전극 면발광 형광램프(50)는 도 1에 도시된 면발광 형광램프(1)과 본질적으로 동일한 것이며, 설명의 편의를 위하여 하기에서는 도면부호 50으로 통일하여 서술한다. 또한 외부전극은 주전극(3)과 보조전극(5)을 의미하는 것으로 이해되어야 하며, 도 1에 도시된 것과 같이 연결되어 있다.The external electrode surface emitting fluorescent lamp 50 is essentially the same as the surface emitting fluorescent lamp 1 shown in FIG. 1, and for convenience of description, the following description will be made with reference to 50. In addition, the external electrode is to be understood as meaning the main electrode 3 and the auxiliary electrode 5, it is connected as shown in FIG.

상기와 같은 구성을 가진 구동장치의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the drive device having the above configuration as follows.

상위제어부인 LCD 컨트롤러(60)에서 구동장치의 작동을 개시하기 위한 구동 신호가 입력되면, 메인컨트롤러(10)에서 프라이밍(priming) 회로(20)로 구동 신호를 출력한 후 프라이밍회로(20)를 오프(Off)시킨다. 이 때 외부전극 면발광 형광램프(50)의 내부에 생성된 하전입자가 소멸되기 전에 메인컨트롤러(10)에서 점등유지회로(30)에 구동 신호를 인가하여 생성된 하전입자를 이용하여 외부전극 면발광형광램프(50)를 구동하게 된다. 이러한 점등상태는 엘시디 컨트롤러(60)로부터 메인컨트롤러(10)에 오프제어신호가 입력될 때 까지 지속된다.When the driving signal for starting the operation of the driving device is input from the LCD controller 60, which is the upper control unit, the driving signal is output from the main controller 10 to the priming circuit 20, and then the priming circuit 20 is closed. Off. At this time, before the charged particles generated inside the external electrode surface light emitting fluorescent lamp 50 are extinguished, the external electrode surface using the charged particles generated by applying a driving signal to the lighting maintaining circuit 30 by the main controller 10. The light emitting fluorescent lamp 50 is driven. This lighting state is continued until the OFF control signal is input from the LCD controller 60 to the main controller 10.

도 4는 상기와 같은 본 발명의 구동장치의 상세회로도로서, 상기 메인컨트롤러(10)는 LCD 컨트롤러(60)로부터 입력되는 제어신호(contorl signal)에 의하여 미리 설정된 소정시간동안 보조전극(5)에 전원을 인가하여 초기점등을 수행하고 그 후에 주전극(3)에 점등전원을 인가하는 타이밍컨트롤러를 포함하고 있으며, 또한 프라이밍회로(20)와 점등유지회로(30)에 각각 구동신호를 인가하기 위하여 직렬연결되는 한 쌍의 저항(R11,R12)를 포함하고 있다.4 is a detailed circuit diagram of the driving apparatus of the present invention as described above, wherein the main controller 10 is connected to the auxiliary electrode 5 for a predetermined time set by a control signal input from the LCD controller 60. It includes a timing controller for applying the power to perform the initial light and then apply the lighting power to the main electrode (3), and to apply a drive signal to the priming circuit 20 and the lighting holding circuit 30, respectively It includes a pair of resistors R11 and R12 connected in series.

따라서 LCD 컨트롤러(60)로부터 점등신호가 입력되면 메인컨트롤러(10)에서 타이밍을 조절하여 프라이밍회로(20)로부터 보조전극(5)을 통하여 인가된 전원에 의하여 외부전극 면발광 형광램프(50)에 하전입자를 생성시키고, 생성된 하전입자가 소멸되기 전에 점등유지회로(30)로부터 주전극(3)을 통하여 전원을 인가하여 저전압으로 외부전극 면발광 형광램프(50)를 동작시키는 것이다. 상기 프라이밍회로(20)를 구동하기 위한 소정시간은 면발광 형광램프(50)에 충분한 하전 입자를 생성하기 위한 형광체의 발광유지시간에 의해 결정된다.Therefore, when a lighting signal is input from the LCD controller 60, the timing is controlled by the main controller 10 to the external electrode surface emitting fluorescent lamp 50 by the power applied from the priming circuit 20 through the auxiliary electrode 5. The charged particles are generated, and the external electrode surface emitting fluorescent lamp 50 is operated at a low voltage by applying power from the lighting sustain circuit 30 through the main electrode 3 before the generated charged particles disappear. The predetermined time for driving the priming circuit 20 is determined by the light emission holding time of the phosphor for generating sufficient charged particles in the surface emitting fluorescent lamp 50.

또한 상기 프라이밍회로(20)는 자려식구동을 위한 트랜스포머(T1)와, 공진커패시터(C22)와, 한 쌍의 스위칭트랜지스터(Q1,Q2)와, 상기 메인컨트롤러(10)의 신호를 전달받아서 상기 스위칭트랜지스터(Q1,Q2)를 구동하기 위한 트랜지스터(Q3)와, 게이트에 입력되는 전압, 전류를 제어하기 위한 저항(R21,R22), 및 입력되는 전류의 안정화를 위한 라인필터(L21,C21)로 구성되어서 외부전극 면발광 형광램프(50)의 보조전극(5)에 전압을 인가한다.In addition, the priming circuit 20 receives a signal from the transformer T1 for self-driving driving, a resonance capacitor C22, a pair of switching transistors Q1 and Q2, and the main controller 10. Transistor Q3 for driving the switching transistors Q1 and Q2, resistors R21 and R22 for controlling the voltage and current input to the gate, and line filters L21 and C21 for stabilizing the input current. The voltage is applied to the auxiliary electrode 5 of the external electrode surface emitting fluorescent lamp 50.

또한 상기 점등유지회로(30)는, 상기 프라이밍회로(20)에 의하여 외부전극 면발광형광램프(50)의 내부에 형성된 하전입자들이 소멸되기 전에 메인컨트롤러(10)로부터의 신호를 받아서 주전극(3)을 통하여 고전압을 인가하는 것으로서, 자려식 구동을 위한 트랜스포머(T2)와, 공진커패시터(C32)와, 한 쌍의 스위칭 트랜지스터(Q3,Q4)와, 메인컨트롤러(10)로부터 제어신호를 받아서 상기 한 쌍의 스위칭 트랜지스터(Q3,Q4)를 구동하기 위한 한 쌍의 트랜지스터(Q5,Q6))와, 게이트에 입력되는 전압, 전류를 제어하기 위한 저항(R31,R32)와, 그리고 입력되는 전류의 안정화를 위한 라인필터(L31,C31)로 구성되어서, 외부전극 면발광 형광램프(50)의 주전극(3)에 전압을 인가한다.In addition, the lighting maintenance circuit 30 receives a signal from the main controller 10 before the charged particles formed in the external electrode surface light emitting fluorescent lamp 50 by the priming circuit 20 disappear. 3) by applying a high voltage through the transformer T2 for the self-driving drive, the resonant capacitor C32, the pair of switching transistors Q3 and Q4, and receives the control signal from the main controller 10 A pair of transistors Q5 and Q6 for driving the pair of switching transistors Q3 and Q4, resistors R31 and R32 for controlling voltage and current input to a gate, and a current input thereto. It consists of line filters (L31, C31) for the stabilization of the, to apply a voltage to the main electrode (3) of the external electrode surface light emitting fluorescent lamp (50).

또한 도 3은 피드백회로(40)를 더 포함하는 본 발명의 구동장치의 다른 실시예의 블럭도로서, 엘시디 컨트롤러(60)로부터의 제어신호에 따라서 외부전극 면발광형광램프(50)를 점등시키고 사용자가 설정한 밝기로 외부전극 면발광 형광램프(50)의 밝기를 조절하기 위하여 제어신호를 출력하는 메인컨트롤러(10), 상기 메인컨트롤러(10)로부터의 제어신호에 의하여 외부전극 면발광형광램프(50)에 초기하전입자를 생성하기 위하여 보조전극(5)에 전원을 공급하는 프라이밍회로(20)와, 상기 프라이밍회로(20)에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극(3)에 전원을 공급하는 점등유지회로(30)와, 외부전극 면발광형광램프(50)에 흐르는 전류를 검출하고 이것을 전압으로 변환하여 상기 메인컨트롤러(10)에 입력하여 점등유지회로(30)에 의한 램프의 밝기를 조정하기 위한 피드백회로(40)를 포함하고 있다. 이것은 도 2와 비교하면 피드백회로(40)가 더 포함되어 있으며, 피드백회로(40)의 궤환작용에 의하여 메인컨트롤러(10)에서 외부전극 면발광 형광램프(50)의 밝기를 조절하는 기능을 더 포함된다.3 is a block diagram of another embodiment of the driving apparatus of the present invention, further including a feedback circuit 40, in which the external electrode surface light emitting fluorescent lamp 50 is turned on in accordance with a control signal from the LCD controller 60. The main controller 10 outputs a control signal to adjust the brightness of the external electrode surface emitting fluorescent lamp 50 to the brightness set by the external electrode surface emitting fluorescent lamp according to the control signal from the main controller 10. Priming circuit 20 for supplying power to the auxiliary electrode (5) to generate the initial charged particles in 50, and the main electrode to apply a sustain voltage using the charged particles generated by the priming circuit (20) (3) detects a current flowing through the lighting sustaining circuit 30 and the external electrode surface light emitting fluorescent lamp 50, converts it into a voltage, inputs it to the main controller 10, and turns on the lighting sustaining circuit 30 ) Due includes a feedback circuit 40 to adjust the brightness of the lamp. Compared to FIG. 2, the feedback circuit 40 is further included, and the main controller 10 further controls the brightness of the external electrode surface emitting fluorescent lamp 50 by the feedback action of the feedback circuit 40. Included.

다시말하면, 점등유지회로(3)에 의하여 전원이 공급되면 외부전극 면발광형광램프(50)에 흐르는 전류는 피드백회로(40)에 의해 감지되어 전압값으로 변환되어 메인컨트롤러(10)에 입력되고 이 입력된 전압에 의해 메인컨트롤러(10)는 점등유지회로(30)에 PWM 신호를 인가하여 외부전극 면발광 백라이트(50)의 밝기를 조정하게 되는 것이다. 밝기 조절 설정값은 사용자에 의해 엘시디 컨트롤러(60)에 입력되었다가 LCD 컨트롤러(60)의 구동신호와 함께 외부전극 면발광 구동장치의 메인컨트롤러(10)로 입력된다.In other words, when power is supplied by the lighting sustain circuit 3, the current flowing through the external electrode surface light emitting fluorescent lamp 50 is sensed by the feedback circuit 40, converted into a voltage value, and input to the main controller 10. By the input voltage, the main controller 10 applies a PWM signal to the lighting sustain circuit 30 to adjust the brightness of the external electrode surface light emitting backlight 50. The brightness adjustment setting value is input to the LCD controller 60 by the user and then input to the main controller 10 of the external electrode surface light emitting driving device together with the driving signal of the LCD controller 60.

도 5는 도 3의 상세회로도로서, 도 4의 회로와 유사하므로 상세한 설명은 생략한다. 상기 피드백회로(40)는, 외부전극 면발광 형광램프(50)에 흐르는 전류를 검출하기 위하여 한 쌍의 다이오드(D41,D42)로 구성된 정류기와, 흐르는 전류를 전압으로 변환하기 위한 저항(R41)과, 상기 저항(R41)으로부터 입력되는 전압신호를 상기 메인컨트롤러(10)로 안정적으로 전달하기 위한 것으로 커패시터(C41)와 저항(R42)으로 구성되는 라인필터를 포함한다.5 is a detailed circuit diagram of FIG. 3 and is similar to the circuit of FIG. 4, and thus a detailed description thereof will be omitted. The feedback circuit 40 includes a rectifier composed of a pair of diodes D41 and D42 for detecting a current flowing through the external electrode surface emitting fluorescent lamp 50, and a resistor R41 for converting the flowing current into a voltage. And a line filter configured to stably transfer the voltage signal input from the resistor R41 to the main controller 10, and including a capacitor C41 and a resistor R42.

상기와 같은 구성을 가진 본 발명의 엘시디용 면발광 형광램프 구동장치의 작동상태를 도 6의 흐름도를 참고하여 설명하면 다음과 같다.Referring to the flowchart of FIG. 6, the operation state of the surface-emitting fluorescent lamp driving apparatus for an LCD of the present invention having the above configuration is as follows.

먼저 사용자가 엘시디가 장착되어 있는 장치를 작동하기 위하여 전원등을 온시키면, 엘시디 콘트롤러(60)에서 엘시디용 구동장치에 구동신호를 입력시킨다(S1). 엘시디 콘트롤러(60)로부터의 구동신호는 구동장치의 메인컨트롤러(10)에 입력된다. 메인컨트롤러(10)에서는 구동신호가 입력되면 먼저 프라이밍회로(20)에 구동신호를 출력한다(S2). 프라이밍회로(20)는 RC시정수에 의하여 설정된 시간동안 작동된다. 프라이밍회로(20)의 작동이 종료(S3)된 후에 메인컨트롤러(10)에서는 외부전극 면발광 형광램프(50)의 점등을 위하여 점등유지회로(30)에 구동신호를 출력한다(S4). 다시말하면, 먼저 외부전극 면발광 형광램프(50)의 보조전극(5)에 전원을 인가하여 외부전극 면발광 형광램프(50)에 하전입자를 형성한 후에, 하전입자가 소멸되기 전에 점등유지회로(30)를 이용하여 주전극(3)을 통하여 전원을 공급하는 것이다. 피드백회로(40)가 더 포함되지 않으면 이러한 동작이 계속 수행된다.First, when the user turns on the power to operate the device is equipped with an LCD, the LCD controller 60 inputs a drive signal to the drive device for the LCD (S1). The drive signal from the LCD controller 60 is input to the main controller 10 of the drive device. When the driving signal is input, the main controller 10 first outputs the driving signal to the priming circuit 20 (S2). The priming circuit 20 is operated for a time set by the RC time constant. After the operation of the priming circuit 20 is terminated (S3), the main controller 10 outputs a driving signal to the lighting sustaining circuit 30 to turn on the external electrode surface emitting fluorescent lamp 50 (S4). In other words, first, after the power is applied to the auxiliary electrode 5 of the external electrode surface light emitting fluorescent lamp 50 to form charged particles in the external electrode surface light emitting fluorescent lamp 50, the sustaining circuit is turned on before the charged particles disappear. Power is supplied through the main electrode 3 using the 30. If no feedback circuit 40 is included, this operation continues.

상기와 같이 점등유지회로(30)에 의하여 전원이 공급되면 외부전극 면발광 형광램프(50)는 점등상태를 유지하여 엘시디화면에 광원을 공급하는 것이다. 이러한 점등유지동작은 엘시디 컨트롤러(60)로부터 오프제어신호가 입력될 때 까지 계속된다.When the power is supplied by the lighting maintaining circuit 30 as described above, the external electrode surface emitting fluorescent lamp 50 maintains the lighting state to supply the light source to the LCD screen. This lighting sustain operation continues until the off control signal is input from the LCD controller 60.

또한 도 3에서와 같이 피드백회로(40)가 더 구비되면, 메인컨트롤러(10)에서는 피드백회로(40)로부터 입력되는 전압값을 이용하여 사용자설정값과 피드백되어 오는 측정값을 비교한 후에 PWM방식으로 점등유지회로(30)에 전압신호를 출력하여 밝기를 제어한다(S5). 이러한 밝기 조정은 엘시디 컨트롤러(60)로부터 오프제어신호가 입력될 때 까지 계속된다.In addition, as shown in FIG. 3, when the feedback circuit 40 is further provided, the main controller 10 compares the user setting value with the measured value fed back using the voltage value input from the feedback circuit 40, and then the PWM method. By outputting a voltage signal to the lighting holding circuit 30 to control the brightness (S5). This brightness adjustment continues until the off control signal is input from the LCD controller 60.

이와 같은 본 발명에 의하면 주전극과 보조전극을 가진 엘시디용 면발광 형광램프에 하전입자 생성을 위한 초기 점등 전압을 인가하고 하전입자 생성후 입자들이 소멸되기 전에 방전 유지용 전압을 인가하여 면발광 형광램프의 점등을 유지할 수 있으며, 또한 저전압에서도 안정적으로 작동되며, 초기점등시의 고전압으로 인한 트랜스포머의 지속적인 스트레스와 스위칭소자의 손실을 감소시킬 수 있는 효과가 있는 것이다.According to the present invention, by applying the initial lighting voltage for the generation of charged particles to the surface-emitting fluorescent lamp for LCD having the main electrode and the auxiliary electrode and applying the discharge maintenance voltage before the particles disappear after the generation of the charged particles surface-emitting fluorescence It is possible to keep the lamp on, and to operate stably at low voltage, and to reduce the constant stress of the transformer and the loss of the switching device due to the high voltage at the initial lighting.

Claims (7)

주전극과 보조전극을 구비한 엘시디용 면발광 형광램프에 전원을 공급하기 위한 것으로, 엘시디 컨트롤러(60)로부터의 제어신호에 따라서 외부전극 면발광 형광램프(50)를 점등시키기 위한 메인컨트롤러(10), 상기 메인컨트롤러(10)로부터의 제어신호에 의하여 외부전극 면발광 형광램프(50)에 초기하전입자를 생성하기 위하여 소정시간동안 보조전극(5)에 전원을 공급하는 프라이밍회로(20) 및 상기 프라이밍회로(20)에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극(3)에 전원을 공급하는 점등유지회로(30)를 포함하는 엘시디용 면발광 형광램프 구동장치에 있어서,The main controller 10 is for supplying power to the surface emitting fluorescent lamp for an LCD having a main electrode and an auxiliary electrode, and for lighting the external electrode surface emitting fluorescent lamp 50 according to a control signal from the LCD controller 60. A priming circuit 20 for supplying power to the auxiliary electrode 5 for a predetermined time in order to generate initial charged particles in the external electrode surface emitting fluorescent lamp 50 according to a control signal from the main controller 10; In the surface emitting fluorescent lamp driving device for an LCD comprising a lighting holding circuit 30 for supplying power to the main electrode (3) to apply the lighting sustain voltage using the charged particles generated by the priming circuit (20) , 상기 메인컨트롤러(10)가 LCD 컨트롤러(60)로부터 입력되는 제어신호에 의하여 미리 설정된 소정시간동안 보조전극(5)에 전원을 인가하여 초기점등을 수행하고 그 후에 주전극(3)에 점등전원을 인가하는 타이밍컨트롤러를 포함하고 있으며, 또한 프라이밍회로(20)와 점등유지회로(30)에 각각 구동신호를 인가하기 위하여 직렬연결되는 한 쌍의 저항(R11,R12)를 포함하는 것을 특징으로 하는 엘시디용 면발광 형광램프 구동장치.The main controller 10 applies power to the auxiliary electrode 5 for a predetermined time set by a control signal input from the LCD controller 60 to perform initial lighting, and then turns on the power supply to the main electrode 3. And a pair of resistors R11 and R12 connected in series to apply a driving signal to the priming circuit 20 and the lighting sustaining circuit 30, respectively. Surface emitting fluorescent lamp driving device. 주전극과 보조전극을 구비한 엘시디용 면발광 형광램프에 전원을 공급하기 위한 것으로, 엘시디 컨트롤러(60)로부터의 제어신호에 따라서 외부전극 면발광형광램프(50)를 점등시키고 사용자가 설정한 밝기로 외부전극 면발광 형광램프(50)의 밝기를 조절하기 위하여 제어신호를 출력하는 메인컨트롤러(10), 상기 메인컨트롤러(10)로부터의 제어신호에 의하여 외부전극 면발광형광램프(50)에 초기하전입자를 생성하기 위하여 소정시간동안 보조전극(5)에 전원을 공급하는 프라이밍회로(20), 상기 프라이밍회로(20)에 의하여 생성된 하전입자를 이용하여 점등 유지 전압을 인가하도록 주전극(3)에 전원을 공급하는 점등유지회로(30), 및 외부전극 면발광 형광램프(50)에 흐르는 전류를 검출하고 이것을 전압으로 변환하여 상기 메인컨트롤러(10)에 입력하여 점등유지회로(30)에 의한 램프의 밝기를 조정하기 위한 피드백회로(40)를 포함하는 엘시디용 면발광 형광램프 구동장치에 있어서,It is for supplying power to the surface emitting fluorescent lamp for LCD having the main electrode and the auxiliary electrode. The external electrode surface emitting fluorescent lamp 50 is turned on according to the control signal from the LCD controller 60, and the brightness set by the user. In order to control the brightness of the external electrode surface light emitting fluorescent lamp 50, the main controller 10 outputs a control signal, and the external electrode surface light emitting fluorescent lamp 50 is initially initialized by a control signal from the main controller 10. A priming circuit 20 for supplying power to the auxiliary electrode 5 for a predetermined time to generate charged particles, the main electrode (3) to apply a sustaining voltage using the charged particles generated by the priming circuit 20 ) Detects a current flowing through the lighting holding circuit 30 and the external electrode surface emitting fluorescent lamp 50 and converts it into a voltage and inputs the voltage to the main controller 10 to turn on the lighting oil. In the surface-emitting fluorescent lamp driving device for an LCD comprising a feedback circuit 40 for adjusting the brightness of the lamp by the branch circuit 30, 상기 메인컨트롤러(10)가 LCD 컨트롤러(60)로부터 입력되는 제어신호에 의하여 미리 설정된 소정시간동안 보조전극(5)에 전원을 인가하여 초기점등을 수행하고 그 후에 주전극(3)에 점등전원을 인가하는 타이밍컨트롤러를 포함하고 있으며, 또한 프라이밍회로(20)와 점등유지회로(30)에 각각 구동신호를 인가하기 위하여 직렬연결되는 한 쌍의 저항(R11,R12)를 포함하는 것을 특징으로 하는 엘시디용 면발광 형광램프 구동장치.The main controller 10 applies power to the auxiliary electrode 5 for a predetermined time set by a control signal input from the LCD controller 60 to perform initial lighting, and then turns on the power supply to the main electrode 3. And a pair of resistors R11 and R12 connected in series to apply a driving signal to the priming circuit 20 and the lighting sustaining circuit 30, respectively. Surface emitting fluorescent lamp driving device. 삭제delete 삭제delete 제1항 또는 제2항중의 어느 한 항에 있어서,The method according to claim 1 or 2, 상기 점등유지회로(30)는, 상기 프라이밍회로(20)에 의하여 외부전극 면발광형광램프(50)의 내부에 형성된 하전입자들이 소멸되기 전에 메인컨트롤러(10)로부터의 신호를 받아서 주전극(3)을 통하여 고전압을 인가하는 것으로서, 자려식 구동을 위한 트랜스포머(T2)와, 공진커패시터(C32)와, 한 쌍의 스위칭 트랜지스터(Q3,Q4)와, 메인컨트롤러(10)로부터 제어신호를 받아서 상기 한 쌍의 스위칭 트랜지스터(Q3,Q4)를 구동하기 위한 한 쌍의 트랜지스터(Q5,Q6))와, 게이트에 입력되는 전압, 전류를 제어하기 위한 저항(R31,R32)와, 그리고 입력되는 전류의 안정화를 위한 라인필터(L31,C31)를 포함하는 것을 특징으로 하는 엘시디용 면발광 형광램프 구동장치.The lighting maintaining circuit 30 receives a signal from the main controller 10 before the charged particles formed in the external electrode surface light emitting fluorescent lamp 50 by the priming circuit 20 disappear. By applying a high voltage through the transformer, the control signal is received from the transformer T2, the resonant capacitor C32, the pair of switching transistors Q3 and Q4, and the main controller 10 for self-driving. A pair of transistors Q5 and Q6 for driving the pair of switching transistors Q3 and Q4, resistors R31 and R32 for controlling the voltage and current input to the gate, and the input current Surface-emitting fluorescent lamp drive device for an LCD comprising a line filter (L31, C31) for stabilization. 제2항에 있어서,The method of claim 2, 상기 피드백회로(40)는, 외부전극 면발광 형광램프(50)에 흐르는 전류를 검출하기 위하여 한 쌍의 다이오드(D41,D42)로 구성된 정류기와, 흐르는 전류를 전압으로 변환하기 위한 저항(R41)과, 상기 저항(R41)으로부터 입력되는 전압신호를 상기 메인컨트롤러(10)로 안정적으로 전달하기 위한 것으로 커패시터(C41)와 저항(R42)으로 구성되는 라인필터를 포함하는 것을 특징으로 하는 엘시디용 면발광 형광램프 구동장치.The feedback circuit 40 includes a rectifier composed of a pair of diodes D41 and D42 for detecting a current flowing through the external electrode surface emitting fluorescent lamp 50, and a resistor R41 for converting the flowing current into a voltage. And a line filter configured to stably transfer the voltage signal input from the resistor R41 to the main controller 10, and including a line filter composed of a capacitor C41 and a resistor R42. Light emitting fluorescent lamp driving device. 삭제delete
KR10-2001-0068928A 2001-06-25 2001-11-06 Device for driving the fluorescent lamp with external electrodes of LCD KR100433804B1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US10/481,110 US7084583B2 (en) 2001-06-25 2001-06-25 External electrode fluorescent lamp, back light unit using the external electrode fluorescent lamp, LCD back light equipment using the back light unit and driving device thereof
KR10-2001-0068928A KR100433804B1 (en) 2001-11-06 2001-11-06 Device for driving the fluorescent lamp with external electrodes of LCD
CNB2005100643168A CN100363819C (en) 2001-06-25 2002-06-25 Back light unit using external electrode fluorescent lamp
AT02741493T ATE428953T1 (en) 2001-06-25 2002-06-25 FLUORESCENCE LAMP WITH EXTERNAL ELECTRODE, TAIL LIGHT UNIT WITH THE FLUORESCENCE LAMP WITH EXTERNAL ELECTRODE, LCD TAIL LIGHT DEVICE WITH THE TAIL LIGHT UNIT AND CONTROL MODULE THEREOF
DE60231983T DE60231983D1 (en) 2001-06-25 2002-06-25 FLUORESCENT LAMP WITH EXTERNAL ELECTRODE, RETURN UNIT WITH FLUORESCENT LAMP WITH EXTERNAL ELECTRODE, LCD RETRIEVING DEVICE WITH BACKUP UNIT AND CONTROL UNIT FOR THIS
ES02741493T ES2326160T3 (en) 2001-06-25 2002-06-25 FLUORESCENT LAMP OF EXTERNAL ELECTRODES, RETROILUMINATION UNIT USING THE FLUORESCENT LAMP OF EXTERNAL ELECTRODES, LIQUID CRYSTAL SCREEN DEVICE DEVICE THAT USES THE RETROILUMINATION UNIT AND ITS DEVICE.
CN200510064317A CN100584141C (en) 2001-06-25 2002-06-25 External-electrode fluorescent lamp driving device
PCT/KR2002/001213 WO2003001550A2 (en) 2001-06-25 2002-06-25 External electrode fluorescent lamp, back light unit using the external electrode fluorescent lamp, lcd back light equipment using the back light unit and driving device thereof
CNB028127099A CN1222816C (en) 2001-06-25 2002-06-25 External electrode fluorescent lamp, back light unit using external electrode fluorescent lamp, LCD back light equipment using back light unit and driving device thereof
JP2003507842A JP3968344B2 (en) 2001-06-25 2002-06-25 External electrode fluorescent lamp, backlight unit using the external electrode fluorescent lamp, LCD backlight device using the backlight unit, and surface emitting fluorescent lamp driving device for LCD
EP02741493A EP1402311B1 (en) 2001-06-25 2002-06-25 External electrode fluorescent lamp, back light unit using the external electrode fluorescent lamp, lcd back light equipment using the back light unit and driving device thereof
US11/342,448 US7327093B2 (en) 2001-06-25 2006-01-30 External electrode fluorescent lamp, backlight unit using the external electrode fluorescent lamp, LCD backlight equipment using the backlight unit and driving device thereof
JP2006198594A JP2006344605A (en) 2001-06-25 2006-07-20 Backlight unit using external electrode fluorescent lamp

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