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KR100566325B1 - Lamp Assembly for Liquid Crystal Display - Google Patents

Lamp Assembly for Liquid Crystal Display Download PDF

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Publication number
KR100566325B1
KR100566325B1 KR1019980062636A KR19980062636A KR100566325B1 KR 100566325 B1 KR100566325 B1 KR 100566325B1 KR 1019980062636 A KR1019980062636 A KR 1019980062636A KR 19980062636 A KR19980062636 A KR 19980062636A KR 100566325 B1 KR100566325 B1 KR 100566325B1
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KR
South Korea
Prior art keywords
wiring
lamp
liquid crystal
crystal display
lamp assembly
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Expired - Fee Related
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KR1019980062636A
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Korean (ko)
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KR20000045976A (en
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최재진
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삼성전자주식회사
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Publication of KR20000045976A publication Critical patent/KR20000045976A/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
    • G02F1/133602—Direct backlight
    • G02F1/133604—Direct backlight with 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
    • H05B41/02—Details
    • 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
    • H05B41/2821—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 single-switch converter or a parallel push-pull converter in the final stage
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

본 발명은 액정표시장치용 램프 어셈블리에 관한 것으로, 제 1 배선을 통해 램프에 인가되는 소정 전압의 파형의 진폭을 줄이고, 제 2 배선을 통해 제 1 배선을 통해 램프에 인가되는 선택된 전압의 파형에 대해 서로 반대위상의 구동전압을 인가하여 상호 간섭을 통해 전자기장을 상쇄시켜 모니터에 미치는 전자기장의 절대 크기를 줄여 화질을 향상시킬 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp assembly for a liquid crystal display device, wherein the amplitude of a waveform of a predetermined voltage applied to a lamp through a first wiring is reduced, and the waveform of a selected voltage applied to the lamp via a first wiring through a second wiring is applied. By applying the driving voltages of opposite phases to each other, the electromagnetic field can be canceled through mutual interference to reduce the absolute size of the electromagnetic field on the monitor, thereby improving image quality.

Description

액정표시장치용 램프 어셈블리Lamp assembly for liquid crystal display

본 발명은 액정표시장치용 램프 어셈블리에 관한 것으로, 더욱 상세하게는 전류 파형의 진폭을 줄여 인버터의 교류 고전압으로 인해 발생되는 화질의 저하를 방지할 수 있도록 한 액정표시장치용 램프 어셈블리에 관한 것이다.The present invention relates to a lamp assembly for a liquid crystal display device, and more particularly to a lamp assembly for a liquid crystal display device to reduce the amplitude of the current waveform to prevent the degradation of the image quality caused by the AC high voltage of the inverter.

일반적으로, 정보화 사회에서 LCD(Liquid Crystal Display)의 개발은 눈부시게 발전하고 있으며 그 역할도 중요화되고 있다. LCD는 자체 발광을 하지 못하고 외부에서 들어오는 광의 양을 조절하여 화면에 표시하는 수광소자이기 때문에 LCD 패널에 광을 조사해 주기 위해서는 별도의 광원, 즉, 백라이트 장치가 사용된다. 이러한, 백라이트 장치는 크게 몰드프레임(mold frame)과 몰드 프레임에 고정되는 도광판, 램프 어셈블리(lamp assembly) 및 시트들로 구성되어 있다.In general, the development of liquid crystal displays (LCDs) in the information society has developed remarkably, and its role is becoming important. Since the LCD does not emit light by itself and adjusts the amount of light coming from the outside to display on the screen, a separate light source, that is, a backlight device, is used to irradiate the LCD panel with light. The backlight device is largely composed of a mold frame and a light guide plate, a lamp assembly, and sheets fixed to the mold frame.

또한, 램프 어셈블리는 광원으로써 램프를 구비한다. 램프를 구동시키기 위해 외부 전원을 변환시켜 공급하는 인버터는 두 개의 배선이 램프와 결선되어 폐루프를 형성한다.The lamp assembly also has a lamp as a light source. In the inverter that converts and supplies external power to drive the lamp, two wires are connected to the lamp to form a closed loop.

즉, 백커버 쪽에 인버터가 구성되며, 인버터는 배선을 통하여 소정 위치에 설치되는 램프와 결선된다. 이때 결선 방법은 인버터를 특정 단자가 위치한 곳에 근접한 램프의 해당 단자와 배선으로 연결되고, 인버터의 다른 단자는 램프의 다른 해당 단자와 배선으로 연결된다.That is, an inverter is configured on the back cover side, and the inverter is connected to a lamp installed at a predetermined position through wiring. At this time, the wiring method is connected to the wiring of the terminal and the corresponding terminal of the lamp near the specific terminal is located, the other terminal of the inverter is connected to the wiring of the other terminal of the lamp.

일반적으로 전술한 바와 같은 구성을 갖는 종래의 대형 모니터의 인버터를 이용한 램프 구동용 전력을 공급하는 배선은 정전기 차폐 조치없이 배선이 노출된다.In general, the wiring for supplying power for driving the lamp using the inverter of the conventional large monitor having the configuration as described above is exposed without the electrostatic shielding measures.

그러므로, 고전압과 고주파 전력을 램프로 공급하는 경로인 배선의 주위에는 전류의 흐름에 따라 도 1에 도시된 바와 같이 전자기파장이 형성되고, 배선이 전자파 차폐없이 노출된 상태에서 많은 테이터를 처리하는 대형 모니터의 동작에 악영향을 끼쳐 모니터의 화질이 저하되는 문제점이 있다.Therefore, a large-scale monitor that forms an electromagnetic wave as shown in FIG. 1 as a current flows around a wiring, which is a path for supplying high voltage and high frequency power to a lamp, and processes a large amount of data while the wiring is exposed without electromagnetic shielding. This may adversely affect the operation of the monitor, thereby degrading the image quality of the monitor.

따라서, 본 발명의 목적은 액정표시장치의 모니터의 동작에 악영향을 끼치는 전자파 간섭 현상을 감소시켜 모니터의 화질저하를 방지하는데 있다.Accordingly, it is an object of the present invention to reduce the image quality of the monitor by reducing the electromagnetic interference phenomenon that adversely affects the operation of the monitor of the liquid crystal display device.

본 발명의 다른 목적은 다음의 상세한 설명과 첨부된 도면으로부터 보다 명확해질 것이다.Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

이와 같은 목적을 달성하기 위해서 본 발명은 램프의 전극에 연결된 제 1 배선에 소정의 진폭 파장을 갖는 전압을 인가하고, 제 2 배선에 제 1 배선에 인가되는 전압에 대해 반대되는 위상의 전압을 인가하여 전자기장을 상쇄시킬 수 있도록 한다.In order to achieve the above object, the present invention applies a voltage having a predetermined amplitude wavelength to the first wiring connected to the electrode of the lamp, and applies a voltage of a phase opposite to the voltage applied to the first wiring to the second wiring. To offset the electromagnetic field.

이하 첨부된 도면을 참조하여 본 발명의 실시예를 보다 상세하게 살펴보면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2를 참조하면, 액정표시장치의 모니터에서 램프 어셈블리와 결합되는 백커버(10)에 소정 위치에 설치된 램프(도시되지 않음)로 전력을 공급하기 위한 인버터(12)가 설치되며, 인버터(12)는 외부로부터 공급되는 전압의 파형을 변형시켜서 램프로 공급한다.Referring to FIG. 2, an inverter 12 for supplying power to a lamp (not shown) installed at a predetermined position is installed in a back cover 10 coupled to a lamp assembly in a monitor of a liquid crystal display device. ) Transforms the waveform of the voltage supplied from the outside to supply to the lamp.

전술한 바와 같이 구성된 실시예에 의하면, 대형 모니터의 구동을 위하여 인버터(12)는 램프의 핫(hot) 전극측에 전기적으로 연결되는 제 1 배선(14)과 램프의 콜드(cold) 전극측에 전기적으로 연결되는 제 2 배선(16) 및 램프를 포함하는 폐루프를 통하여 전류를 공급하고, 이때, 도 3a에 도시된 바와 같이, 제 1 배선(14)을 통해 램프에 인가되는 소정 전압의 파형의 진폭을 줄여 모니터에 미치는 전자기장의 절대 크기를 줄인다.According to the embodiment configured as described above, the inverter 12 is connected to the first electrode 14 electrically connected to the hot electrode side of the lamp and the cold electrode side of the lamp for driving the large monitor. The current is supplied through the closed loop including the second wiring 16 and the lamp, which are electrically connected, and at this time, a waveform of a predetermined voltage applied to the lamp through the first wiring 14, as shown in FIG. 3A. Reducing the amplitude of the antenna reduces the absolute magnitude of the electromagnetic field on the monitor.

또한, 도 3b에 도시된 바와 같이, 제 2 배선(16)을 통해 제 1 배선(14)을 통해 램프에 인가되는 선택된 전압의 파형에 대해 서로 반대위상의 구동전압을 인가한다.In addition, as shown in FIG. 3B, the driving voltages of opposite phases are applied to the waveform of the selected voltage applied to the lamp through the first wiring 14 through the second wiring 16.

그에 따라서 제 1 배선(14)에서 발생되는 제 1 전자기장과 제 2 배선(16)에서 발생되는 제 2 전자기장은 플레밍 법칙에 따라서 서로 반대 방향으로 형성되며, 그 결과 제 1 전자기장과 제 2 전자기장은 상호간섭에 의하여 상쇄된다. Accordingly, the first electromagnetic field generated in the first wiring 14 and the second electromagnetic field generated in the second wiring 16 are formed in opposite directions according to Fleming's law, so that the first electromagnetic field and the second electromagnetic field are mutually Canceled by interference.

이렇게 제 1 배선(14)과 제 2 배선(16)에 서로 반대위상의 구동전압이 인가됨에 따라 상호 간섭에 의해 전자기장이 서로 상쇄된다.As the driving voltages of opposite phases are applied to the first wiring 14 and the second wiring 16, electromagnetic fields cancel each other by mutual interference.

같은 주파수와 같은 전류 값을 가짐으로써 제 1 및 제 2 배선의 전류 흐름에 의하여 유도되는 제 1 및 제 2 전자기장의 세기는 동일하고, 따라서 두 전자기장 간의 간섭 현상에 의하여 전자기장이 외부로 미치는 영향력은 상쇄된다.The intensity of the first and second electromagnetic fields induced by the current flow of the first and second wirings by the same frequency and the same current value is the same, so that the influence of the electromagnetic fields to the outside due to the interference phenomenon between the two electromagnetic fields cancels out. do.

따라서, 대형 모니터를 구동하기 위하여 구성된 컨트롤 보드와 같은 보드 부분, 특히 액정 구동 방식의 모니터인 경우 기판으로 출력되는 데이터 등에 인버터 전력 공급에 따른 전자파 간섭 현상이 방지된다.Therefore, in the case of a monitor part such as a control board configured to drive a large monitor, especially a liquid crystal drive type monitor, electromagnetic interference due to inverter power supply to the data output to the substrate is prevented.

이상에서 상세히 설명한 바와 같이, 본 발명은 바람직한 실시예에 대해 상세히 기술되었지만, 본 발명이 속하는 기술 분야에 있어서 통상의 지식을 가진 사람이라면, 본 발명의 정신 및 범위를 벗어나지 않으면서 본 발명을 여러 가지로 변형 또는 변경하여 실시할 수 있음을 알 수 있을 것이다.As described in detail above, the present invention has been described in detail with respect to preferred embodiments, but those skilled in the art to which the present invention pertains, various embodiments of the present invention without departing from the spirit and scope of the present invention It will be appreciated that the present invention may be modified or modified as described above.

이상에서 살펴본 바와 같이 본 발명은 제 1 배선을 통해 램프에 인가되는 소정 전압의 파형의 진폭을 줄이고, 제 2 배선을 통해 제 1 배선을 통해 램프에 인가되는 선택된 전압의 파형에 대해 서로 반대위상의 구동전압을 인가하여 상호 간섭을 통해 전자기장을 상쇄시켜 모니터에 미치는 전자기장의 절대 크기를 줄여 화질을 향상시키는 효과가 있다.As described above, the present invention reduces the amplitude of the waveform of the predetermined voltage applied to the lamp through the first wiring, and is opposite to each other with respect to the waveform of the selected voltage applied to the lamp through the first wiring through the second wiring. By applying a driving voltage to cancel the electromagnetic field through mutual interference has the effect of improving the image quality by reducing the absolute size of the electromagnetic field on the monitor.

도 1은 종래의 기술에 의한 파형을 나타낸 상태도. 1 is a state diagram showing a waveform according to the prior art.

도 2는 본 발명의 기술에 따른 실시예에 의한 액정표시장치용 램프 어셈블리를 나타낸 평면도.2 is a plan view showing a lamp assembly for a liquid crystal display device according to an embodiment of the present invention.

도 3은 본 발명의 기술에 따른 실시예에 의한 파형을 나타낸 상태도.Figure 3 is a state diagram showing a waveform according to an embodiment according to the technology of the present invention.

Claims (1)

제1 전극 및 제1 전극과 대향하는 제2 전극을 갖는 램프; A lamp having a first electrode and a second electrode opposite the first electrode; 상기 램프의 상기 제1 전극에 전기적으로 연결된 제 1 배선;A first wiring electrically connected to the first electrode of the lamp; 상기 램프의 상기 제2 전극에 전극적으로 연결되며 상기 제1 배선과 이격 된 제 2 배선; 및A second wiring electrically connected to the second electrode of the lamp and spaced apart from the first wiring; And 상기 제 1 배선에 제1 진폭 파장을 갖는 제1 전압을 인가하고, 상기 제 2 배선에 상기 제 1 전압과 동일한 주파수, 상기 제1 전압과 동일한 진폭을 갖고 상기 제1 전압에 대하여 반대 위상을 갖는 제2 전압을 인가하여 상기 제1 및 제2 배선들에 형성된 전자기장을 상쇄시키는 인버터를 포함하는 것을 특징으로 하는 액정표시장치용 램프 어셈블리. A first voltage having a first amplitude wavelength is applied to the first wiring, the same frequency as the first voltage, the same amplitude as the first voltage, and a phase opposite to the first voltage to the second wiring; And an inverter configured to apply a second voltage to cancel the electromagnetic fields formed in the first and second wires.
KR1019980062636A 1998-12-31 1998-12-31 Lamp Assembly for Liquid Crystal Display Expired - Fee Related KR100566325B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019980062636A KR100566325B1 (en) 1998-12-31 1998-12-31 Lamp Assembly for Liquid Crystal Display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019980062636A KR100566325B1 (en) 1998-12-31 1998-12-31 Lamp Assembly for Liquid Crystal Display

Publications (2)

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KR20000045976A KR20000045976A (en) 2000-07-25
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KR100507728B1 (en) * 2002-07-18 2005-08-10 주식회사 우영 Lighting apparatus for flat display panel
KR20040019565A (en) * 2002-08-28 2004-03-06 주식회사 우영 Back light apparatus for flat display panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970013549A (en) * 1995-08-04 1997-03-29 김덕원 Parallel Double Row Wiring Method for Suppression of Magnetic Field Generation
JPH0992479A (en) * 1995-09-20 1997-04-04 Advanced Display:Kk Backlight for display device
JPH09120066A (en) * 1996-09-20 1997-05-06 Hitachi Ltd Liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970013549A (en) * 1995-08-04 1997-03-29 김덕원 Parallel Double Row Wiring Method for Suppression of Magnetic Field Generation
JPH0992479A (en) * 1995-09-20 1997-04-04 Advanced Display:Kk Backlight for display device
JPH09120066A (en) * 1996-09-20 1997-05-06 Hitachi Ltd Liquid crystal display

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