KR20020058300A - Apparatus for driving of invertor lamp - Google Patents
Apparatus for driving of invertor lamp Download PDFInfo
- Publication number
- KR20020058300A KR20020058300A KR1020000086362A KR20000086362A KR20020058300A KR 20020058300 A KR20020058300 A KR 20020058300A KR 1020000086362 A KR1020000086362 A KR 1020000086362A KR 20000086362 A KR20000086362 A KR 20000086362A KR 20020058300 A KR20020058300 A KR 20020058300A
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- Prior art keywords
- transformer
- primary winding
- lamp
- driving
- capacitor
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
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- Inverter Devices (AREA)
Abstract
Description
본 발명은 CCFL 구동용 인버터 램프의 구동 장치에 관한 것으로 특히, 1개의 스위치로 싱글 스테이지 회로를 구성함으로써 기존의 회로에 비하여 낮은 생산 단가를 제공하는 인버터 램프의 구동 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a CCFL drive inverter lamp, and more particularly, to a drive device for an inverter lamp that provides a lower production cost than a conventional circuit by configuring a single stage circuit with one switch.
일반적으로, 노트북 컴퓨터 등과 같이 LCD를 사용하는 전자장치에는 사용자가 LCD 디스플레이장치에 표시되는 문자 혹은 도형들을 정확하게 볼 수 있도록 LCD 후면에 백라이트라는 조명 수단을 구비하게 된다.In general, an electronic device using an LCD, such as a notebook computer, is provided with an illumination means called a backlight on the back of the LCD so that a user can accurately see the characters or figures displayed on the LCD display device.
이때, 흔히 백라이트로 사용되는 냉음극 형광램프(CCFL)는 DC/DC 변압 방식에 의해 구동용 전압을 발생시키며, 상기 냉음극 형광램프(CCFL)의 구동 전압을 일정하게 유지하기 위해서, 상기 냉음극 형광램프(CCFL)에 구동 전압을 공급해 주는트랜스의 일차측 전압을 측정한 후 그 측정 결과에 따라 상기 트랜스의 일차측 전압을 조정하여 냉음극 형광램프의 구동 전압을 일정하게 제어한다.In this case, a cold cathode fluorescent lamp (CCFL), which is commonly used as a backlight, generates a driving voltage by a DC / DC transformation method, and in order to maintain a constant driving voltage of the cold cathode fluorescent lamp (CCFL), the cold cathode After measuring the primary side voltage of the transformer for supplying the driving voltage to the fluorescent lamp (CCFL), the primary side voltage of the transformer is adjusted according to the measurement result to control the driving voltage of the cold cathode fluorescent lamp constantly.
첨부한 도 1 또는 도 2는 종래의 인버터 램프의 구동 장치의 예들을 보인 것으로 첨부한 도 1은 하프 브릿지(Half Bridge) 방식이라고 칭하는 방식으로, 구비되어 있는 스위칭 수단인 Q1과 Q2가 교번적으로 온/오프를 반복하게되고, 그에 따라 트랜스(T)의 1차 측에 흐르는 전류의 변화가 트랜스(T)의 2차 측으로 유기되어 냉음극 형광램프(CCFL)에 고전압이 걸리게 되는 구조이다.FIG. 1 or FIG. 2 shows examples of a drive device of a conventional inverter lamp. FIG. 1 is a method called a half bridge method. The switching means Q1 and Q2 are alternately provided. On / off is repeated, and accordingly, the change of the current flowing to the primary side of the transformer T is induced to the secondary side of the transformer T, and a high voltage is applied to the cold cathode fluorescent lamp CCFL.
또한, 첨부한 도 2는 풀 브릿지(Full Bridge) 방식이라고 칭하는 방식으로, 구비되어 있는 스위칭 수단인 Qa∼Qd중 참조번호 Qa와 Qd가 온동작시 Qb와 Qc가 오프동작하고 그에 따라 트랜스(T)의 1차 측에 흐르는 전류의 방향이 순방향이라고 가정하면 이후 참조번호 Qa와 Qd가 오프동작하고 Qb와 Qc가 온동작하여 상기 트랜스(T)의 1차 측에 흐르는 전류의 방향이 역방향으로 반전됨으로써 트랜스(T)의 1차 측에 흐르는 전류의 변화가 트랜스(T)의 2차 측으로 유기되어 냉음극 형광램프(CCFL)에 고전압이 걸리게 되는 구조이다.In addition, FIG. 2 is a method called a full bridge method. When reference numerals Qa and Qd of the switching means Qa to Qd which are provided are on, Qb and Qc are turned off and accordingly a transformer (T) is used. Assuming that the direction of the current flowing in the primary side of the () is forward, reference numerals Qa and Qd are turned off and Qb and Qc are turned on so that the direction of the current flowing in the primary side of the transformer T is reversed in the reverse direction. As a result, the change in the current flowing to the primary side of the transformer T is induced to the secondary side of the transformer T, so that a cold voltage is applied to the cold cathode fluorescent lamp CCFL.
이때, 상술한 바와 같은 종래의 기술들을 흔히 싱글-스테이지(single-Stage) 방식이라 칭하는데, 통상 상술한 싱글-스테이지 방식의 인버터 램프 구동 장치는 다른 방식에 비하여 가격적인 면이 생산자에게 부담으로 작용하는 문제점이 발생되었다.In this case, the conventional techniques as described above are often referred to as a single-stage method. In general, the inverter lamp driving apparatus of the single-stage method is more expensive than other methods in terms of cost. The problem occurred.
상기 종래 기술의 문제점을 해소하기 위한 본 발명의 목적은 1개의 스위치로싱글 스테이지 회로를 구성함으로써 기존의 회로에 비하여 낮은 생산 단가를 제공하는 인버터 램프의 구동 장치를 제공하는 데 있다.An object of the present invention for solving the problems of the prior art is to provide a drive device for an inverter lamp that provides a low production cost compared to the existing circuit by configuring a single stage single switch circuit.
도 1은 하프 브릿지(Half Bridge) 방식의 인버터 램프의 구동 장치의 예시도.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an illustration of a drive device for an inverter lamp of a half bridge method.
도 2는 풀 브릿지(Full Bridge) 방식의 인버터 램프의 구동 장치의 예시도.2 is an exemplary view of a drive device for an inverter lamp of a full bridge method.
도 3은 본 발명에 따른 인버터 램프의 구동 장치의 예시도.3 is an exemplary view of a drive device for an inverter lamp according to the present invention.
상기 목적을 달성하기 위한 본 발명의 특징은, 1차측 권선에 유입되는 입력 전압을 2차측 권선으로 유기 시키는 트랜스와, 상기 트랜스에서 출력되는 전압으로 구동하는 냉음극 형광램프를 구비한 인버터 램프의 구동 장치에 있어서: 상기 트랜스의 1차측 권선에 축적되어진 에너지에 의해 충전되며 축적된 전하를 이용하여 상기 트랜스의 1차측 권선과 LC공진회로를 구현하는 캐패시터와; 상기 트랜스의 1차측 권선과 접지단 사이에 연결되며 온동작시 상기 트랜스의 1차측 권선에 에너지를 축적하도록하며 오프 동작시 캐패시터에 축적된 전하를 방출시키는 스위치를 포함하는 데 있다.A feature of the present invention for achieving the above object is the drive of an inverter lamp having a transformer for inducing the input voltage flowing in the primary winding to the secondary winding, and a cold cathode fluorescent lamp for driving at the voltage output from the transformer. An apparatus comprising: a capacitor that is charged by energy accumulated in a primary winding of a transformer and implements an LC resonant circuit with a primary winding of the transformer using the accumulated charge; And a switch connected between the primary winding of the transformer and the ground terminal to accumulate energy in the primary winding of the transformer during on-operation and to release charge accumulated in the capacitor during off-operation.
본 발명의 상술한 목적과 여러 가지 장점은 이 기술 분야에 숙련된 사람들에 의해 첨부된 도면을 참조하여 후술되는 발명의 바람직한 실시예로부터 더욱 명확하게 될 것이다.The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.
이하, 상기와 같은 기술적 사상에 따른 본 발명의 바람직한 실시 예를 첨부한 도면에 의거 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above in detail.
첨부한 도 3은 본 발명에 따른 인버터 램프의 구동 장치의 예시도로서, 참조번호 L1은 트랜스(T)의 1차측 권선을 지칭하며, 참조번호 L2은 트랜스(T)의 2차측 권선을 지칭하고, 참조번호 C1은 트랜스(T)의 1차측 권선(L1)의 일단과 접지단사이에 연결되어 있으며 전하의 충전상태에서 상기 1차측 권선(L1)과 함께 LC공진을 수행하기 위한 제 1캐패시터이며, 참조번호 C2는 상기 트랜스(T)의 2차측 권선(L2)을 통해 유기되는 고전압을 냉음극 형광램프(CCFL)에 안전하게 인가하기 위한 제 2캐패시터이다.3 is an exemplary view of a driving device of an inverter lamp according to the present invention, in which reference numeral L1 denotes a primary winding of a transformer T, and reference numeral L2 denotes a secondary winding of a transformer T. , Reference numeral C1 is connected between one end of the primary winding L1 of the transformer T and the ground terminal, and is a first capacitor for performing LC resonance together with the primary winding L1 in a state of charge charging. , C2 is a second capacitor for safely applying the high voltage induced through the secondary winding (L2) of the transformer (T) to the cold cathode fluorescent lamp (CCFL).
이때, 상기 트랜스(T)의 1차측 권선(L1)에 흐르는 전류의 변동을 주기 위한 수단으로써 상기 제 1캐패시터(C1)에 병렬로 연결되어 있는 스위치(Q)가 구비된다.In this case, a switch Q connected in parallel to the first capacitor C1 is provided as a means for varying the current flowing through the primary winding L1 of the transformer T.
상기와 같이 구성되는 본 발명에 따른 인버터 램프의 구동 장치는 스위치(Q)가 도시하지 않은 스위칭 제어부의 제어동작에 따라 온오프 동작을 반복하게 되는데, 상기 스위치(Q)가 온동작시 트랜스(T)의 1차측 권선(L1)에 에너지가 축적되고 상기 스위치(Q)가 오프동작시 상기 트랜스(T)의 1차측 권선(L1)에 축적되어진 에너지가 방전되는 가운데 연결되어 있는 제1캐패시터(C1)에 충전되며 이후 상기 제1캐패시터(C1)의 방전경로상에 존재하는 상기 트랜스(T)의 1차측 권선(L1)에 다시 에너지가 축적되는 과정을 반복하여 LC공진이 일어나게 된다.The drive device of the inverter lamp according to the present invention configured as described above is to repeat the on-off operation in accordance with the control operation of the switching control unit (not shown) switch Q, when the switch (Q) is on the transformer (T) Energy is accumulated in the primary winding (L1) of the first and the first capacitor (C1) connected while the energy stored in the primary winding (L1) of the transformer (T) is discharged when the switch (Q) is turned off ) And then accumulate energy in the primary winding L1 of the transformer T again on the discharge path of the first capacitor C1 to generate LC resonance.
이와 같은 방법으로 상기 트랜스(T)의 1차측 권선(L1)에 흐르는 전류의 방향이 변동하게되고 이를 기준으로 트랜스(T)는 2차측 권성(L2)로 고전압의 전원을 유기시키게 된다.In this way, the direction of the current flowing in the primary winding L1 of the transformer T is changed, and based on this, the transformer T induces the high voltage power to the secondary winding L2.
이상의 설명에서 본 발명은 특정의 실시예와 관련하여 도시 및 설명하였지만, 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 개조 및 변화가 가능하다는 것을 당업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다.While the invention has been shown and described in connection with specific embodiments thereof, it will be appreciated that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.
이상에서 상술한 본 발명에 따른 인버터 램프의 구동 장치를 제공하면, 1개의 스위치로 싱글 스테이지 회로를 구성함으로써 기존의 회로에 비하여 낮은 생산 단가를 제공하는 효과가 있다.According to the driving device of the inverter lamp according to the present invention as described above, by constructing a single stage circuit with one switch, there is an effect of providing a low production cost compared to the existing circuit.
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KR1020000086362A KR20020058300A (en) | 2000-12-29 | 2000-12-29 | Apparatus for driving of invertor lamp |
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KR1020000086362A KR20020058300A (en) | 2000-12-29 | 2000-12-29 | Apparatus for driving of invertor lamp |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030068756A (en) * | 2002-02-18 | 2003-08-25 | 앰비트 마이크로시스템즈 코포레이션 | Inverter and lamp ignition system using the same |
US7391163B2 (en) | 2003-02-28 | 2008-06-24 | Samsung Electronics Co., Ltd. | Apparatus of driving light source for display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0660988A (en) * | 1992-08-05 | 1994-03-04 | Ushio Inc | Small fluorescent lamp lighting device |
KR950004946U (en) * | 1993-07-21 | 1995-02-18 | Synchronous Inverter Circuit for Liquid Crystal Display Backlight | |
JPH07183083A (en) * | 1993-12-24 | 1995-07-21 | Sharp Corp | Lamp control circuit for cooking apparatus |
JPH09260076A (en) * | 1996-03-22 | 1997-10-03 | Toko Inc | Lighting dimming circuit for cold cathode fluorescent lamp |
-
2000
- 2000-12-29 KR KR1020000086362A patent/KR20020058300A/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0660988A (en) * | 1992-08-05 | 1994-03-04 | Ushio Inc | Small fluorescent lamp lighting device |
KR950004946U (en) * | 1993-07-21 | 1995-02-18 | Synchronous Inverter Circuit for Liquid Crystal Display Backlight | |
JPH07183083A (en) * | 1993-12-24 | 1995-07-21 | Sharp Corp | Lamp control circuit for cooking apparatus |
JPH09260076A (en) * | 1996-03-22 | 1997-10-03 | Toko Inc | Lighting dimming circuit for cold cathode fluorescent lamp |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030068756A (en) * | 2002-02-18 | 2003-08-25 | 앰비트 마이크로시스템즈 코포레이션 | Inverter and lamp ignition system using the same |
US7391163B2 (en) | 2003-02-28 | 2008-06-24 | Samsung Electronics Co., Ltd. | Apparatus of driving light source for display device |
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