KR20040002128A - Back light of liquid crystal display device - Google Patents
Back light of liquid crystal display device Download PDFInfo
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- KR20040002128A KR20040002128A KR1020020037559A KR20020037559A KR20040002128A KR 20040002128 A KR20040002128 A KR 20040002128A KR 1020020037559 A KR1020020037559 A KR 1020020037559A KR 20020037559 A KR20020037559 A KR 20020037559A KR 20040002128 A KR20040002128 A KR 20040002128A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/46—Fixing elements
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
Description
본 발명은 액정표시장치용 백 라이트(Back Light)에 관한 것으로, 특히 직하형 백라이트에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back light for a liquid crystal display device, and more particularly to a direct type backlight.
표시화면의 두께가 수 센치미터(cm)에 불과한 초박형의 평판(Flat panel)디스플레이 장치, 그 중에서도 액정 디스플레이 장치(Liquid Crystal Display :LCD)는 주로 노트 북 컴퓨터, 모니터, 우주선, 항공기 등에 이르기까지 응용분야가 넓고 다양하다.Ultra-thin flat panel display devices with a thickness of only a few centimeters (cm), liquid crystal displays (LCDs) are mainly used for notebook computers, monitors, spacecraft, aircraft, etc. The field is wide and diverse.
이러한 액정 디스플레이 장치 중 수동발광형 액정 디스플레이 장치는 액정 패널 뒤에 광원으로 사용되는 백 라이트(Back Light)가 장착되어 있으며, 이러한 백 라이트의 장착은 두께, 무게 및 전력소모 측면에서 비효율적으로 작용하고 있어 아직도 많은 연구가 계속되고 있다.Among the liquid crystal display devices, the passive light emitting liquid crystal display device is equipped with a back light, which is used as a light source behind the liquid crystal panel, and the mounting of the backlight is inefficient in terms of thickness, weight, and power consumption. Much research is going on.
일반적으로, 액정 디스플레이 장치의 광원으로 사용되는 소위 백 라이트는 원통형의 형광 램프를 배치하는 방식으로서, 직하형 방식과 도광판 방식으로 구분된다.In general, a so-called backlight used as a light source of a liquid crystal display device is a method of disposing a cylindrical fluorescent lamp, which is divided into a direct type method and a light guide plate method.
직하형 방식은 평면에 형광 램프를 배치하는데, 형광 램프의 형상이 액정 패널에 나타나므로 램프와 액정 패널 사이의 간격을 유지해 주어야 하고, 전체적으로 균일한 광량 분포를 위해 광 산란수단을 배치하여야 하므로 박형화에는 한계가 있다. 또한, 패널이 대면적화됨에 따라 백 라이트의 광출사면의 면적도 증가하게 되는데, 직하형 백 라이트를 대형화할 경우, 광 산란수단이 충분한 두께를 확보하지 못하면 광 출사면이 평탄치 않고, 이러한 이유로 인해 광 산란수단의 두께를 충분히 확보하지 않으면 안된다.In the direct type, the fluorescent lamp is disposed on a flat surface. Since the shape of the fluorescent lamp appears on the liquid crystal panel, the gap between the lamp and the liquid crystal panel must be maintained, and the light scattering means must be arranged for the uniform distribution of light. There is a limit. In addition, as the panel becomes larger, the area of the light exit surface of the backlight also increases. When the direct backlight is enlarged, the light exit surface is not flat unless the light scattering means secures sufficient thickness. Therefore, the thickness of the light scattering means must be sufficiently secured.
한편, 도광판 방식은 외곽에 형광 램프를 설치하고 도광판을 이용하여 전체의 면으로 빛을 분산하는 것으로, 형광 램프가 측면에 설치되고, 빛이 도광판을 통과하여야 하므로 휘도가 낮은 문제점이 있다. 또한 균일한 광도의 분포를 위해서는도광판에 대한 고도의 광학적 설계기술과 가공기술이 요구된다.On the other hand, the light guide plate method is to install a fluorescent lamp on the outside and to distribute the light to the entire surface using the light guide plate, the fluorescent lamp is installed on the side, there is a problem that the brightness is low because the light must pass through the light guide plate. In addition, high optical design and processing techniques for the light guide plate are required for uniform distribution of light intensity.
이와 같이 직하형 방식과 도광판 방식은 나름대로의 단점을 가지고 있기 때문에 화면의 두께보다는 밝기가 중요시되는 액정표시소자에서는 직하형 방식의 백 라이트를 주로 사용하고, 노트 북 PC나 모니터용 PC와 같은 두께가 중요시되는 액정표시소자에서는 도광판 방식의 백 라이트가 주로 사용된다.Since the direct type and the light guide plate have their disadvantages, the direct type backlight is mainly used in the liquid crystal display device where brightness is more important than the screen thickness. In the liquid crystal display device of importance, a light guide plate type backlight is mainly used.
현재, 고휘도의 백 라이트를 구현하기 위한 일환으로, 여러개의 램프를 표시화면의 하측에 배치하거나, 한 개의 램프를 구부려서 배치하는 등 직하형 백 라이트에 관한 연구, 개발이 계속되고 있는 추세에 있다.Currently, as part of implementing a high-brightness backlight, research and development on direct backlights have continued, such as disposing several lamps on the lower side of a display screen or bending one lamp.
이하, 종래 기술에 따른 액정표시소자용 백 라이트를 첨부된 도면을 참조하여 설명하기로 한다.Hereinafter, a backlight for a liquid crystal display device according to the prior art will be described with reference to the accompanying drawings.
도 1은 종래의 액정표시장치용 직하형 백 라이트의 사시도이고, 도 2는 종래의 발광 램프와 커넥터에 연결된 인버터를 나타낸 도면이다.1 is a perspective view of a conventional direct backlight for a liquid crystal display, and FIG. 2 is a view showing an inverter connected to a conventional light emitting lamp and a connector.
도 1에 도시된 바와 같이, 종래 액정표시소자용 백 라이트는 복수개의 발광 램프(1)들과, 상기 발광 램프(1)들을 고정시키고 지지하는 외곽 케이스(3)와, 상기 발광 램프(1)와 액정 패널(도시하지 않음) 사이에 배치된 광 산란수단(5a,5b,5c)으로 구성된다.As shown in FIG. 1, a conventional backlight for a liquid crystal display device includes a plurality of light emitting lamps 1, an outer case 3 for fixing and supporting the light emitting lamps 1, and the light emitting lamp 1. And light scattering means 5a, 5b, 5c disposed between the liquid crystal panel (not shown).
상기 광 산란수단(5a,5b,5c)은 발광 램프의 형상이 액정 패널의 표시면에 나타나는 것을 방지하고 전체적으로 균일한 밝기 분포를 갖는 광원을 제공하기 위한 것으로, 광 산란 효과를 증진시키기 위해 액정 패널과의 사이에 다수의 확산 시트(Diffusion sheet) 및 확산 플레이트(Diffusion plate) 등이 배치된다.The light scattering means (5a, 5b, 5c) is to prevent the shape of the light emitting lamp from appearing on the display surface of the liquid crystal panel and to provide a light source having an overall uniform brightness distribution, in order to enhance the light scattering effect A plurality of diffusion sheets, diffusion plates, and the like are disposed between the cells.
상기 외곽 케이스(3)의 내면에는 발광 램프(1)에서 발생된 광이 액정 패널의 표시부로 집중 조사될 수 있도록 반사판(7)이 배치되어 있으며, 이는 광의 이용효율을 최대한 좋게 하기 위함이다.The inner surface of the outer case 3 is disposed with a reflector 7 so that the light emitted from the light emitting lamp 1 can be concentrated to the display unit of the liquid crystal panel, which is to maximize the utilization efficiency of the light.
상기 발광 램프(1)는 도 2와 같이 냉음극관 램프(Cold Cathode Fluorescent Lamp :CCFL)로서, 관(Tube) 내부의 양단에 전극이 배치되어 상기 전극에 전원이 인가되면 발광하고, 상기 발광 램프(1)의 양단은 도 1과 같이, 외곽 케이스(3)의 양쪽면에 형성된 홈에 끼워져 있다.The light emitting lamp 1 is a Cold Cathode Fluorescent Lamp (CCFL) as shown in FIG. 2, and electrodes are disposed at both ends of a tube to emit light when power is applied to the electrode, and the light emitting lamp ( Both ends of 1) are fitted in grooves formed on both sides of the outer case 3 as shown in FIG.
상기 발광 램프(1)의 양쪽 전극에는 램프 구동을 위한 전원을 전달하는 전원인입선(9,9a)이 연결되고, 상기 전원인입선(9,9a)은 별도의 커넥터(11)에 연결되어 구동회로와 접속된다.Power inlets 9 and 9a for transmitting power for driving the lamps are connected to both electrodes of the light emitting lamp 1, and the power inlets 9 and 9a are connected to a separate connector 11 to drive a circuit. Connected.
이러한 발광 램프(1)를 구동하기 위한 상기 구동회로는 AC 어댑터 또는 배터리로부터 제공되는 직류 전압을 발광 램프(1)에 적합한 일정 주파수 및 전압레벨을 갖는 교류 전압으로 변환하여 제공하는 DC/AC 인버터(DC/AC inverter)이다.The driving circuit for driving the light emitting lamp 1 includes a DC / AC inverter for converting a DC voltage provided from an AC adapter or a battery into an AC voltage having a predetermined frequency and voltage level suitable for the light emitting lamp 1. DC / AC inverter).
상기 인버터는 고압측인버터(15a)와 저압측인버터(15b)로 구성되고, 한 쌍의 발광램프(1)들의 전원인입선(9)(9a)이 묶여진 커넥터(11)를 통해 발광 램프(1) 양단의 전극과 인버터가 각각 연결됨으로써, 발광 램프(1)에 교류 전류가 흘러 발광 램프(1)를 발광시킨다.The inverter consists of a high voltage side inverter (15a) and a low voltage side inverter (15b), the light emitting lamp (1) through the connector 11, the power lead wires (9) (9a) of the pair of light emitting lamps (1) are bundled The electrodes at both ends and the inverter are connected to each other so that an alternating current flows through the light emitting lamp 1 to emit the light emitting lamp 1.
액정표시장치의 화면 밝기는 상기 발광 램프(1)로 제공되는 교류 전류의 량을 조절하는 것에 의해 이루어진다.The screen brightness of the liquid crystal display is achieved by adjusting the amount of alternating current provided to the light emitting lamp 1.
그러나, 이와 같은 종래의 액정표시장치용 백 라이트는 다음과 같은 문제점이 있었다.However, such a conventional LCD backlight has the following problems.
종래의 액정표시장치용 백라이트는 그 구동회로로서 2 개의 인쇄회로기판(PCB)을 사용하여 고압측 인버터(15a) 및 저압측 인버터(15b)를 발광 램프(1) 양단에 배치하였다. 이러한 2 개의 인쇄회로기판은 각 백라이트마다 고정적으로 배치되어야 하므로 이는 생산비용의 증가를 발생시켰다.In a conventional backlight for a liquid crystal display device, a high voltage side inverter 15a and a low voltage side inverter 15b are disposed across the light emitting lamp 1 using two printed circuit boards (PCBs) as driving circuits thereof. These two printed circuit boards have to be fixedly arranged for each backlight, which leads to an increase in production cost.
또한, 불량이 발생한 발광 램프(1) 교체시 백 라이트를 분해하여 교체해야 하므로 상당한 작업시간이 소요되었다.In addition, when replacing the light-emitting lamp (1) in which the failure occurred, it was necessary to disassemble and replace the backlight, which took a considerable time.
또한, 대형 모델(Model)의 액정표시장치일수록 발광 램프(1)의 양단 전극과의 거리가 상당함으로, 관전류 측정에 어려움이 따랐다.In addition, the larger the liquid crystal display device of a model, the greater the distance between the electrodes of both ends of the light emitting lamp 1, and thus the difficulty in measuring the tube current.
따라서, 본 발명은 상기 문제점을 해결하기 위해 안출된 것으로, 발광 램프의 형태를 변형하여 저비용 및 관전류 측정이 용이한 액정표시장치용 백라이트를 제공하는 것을 그 목적으로 한다.Accordingly, an object of the present invention is to provide a backlight for a liquid crystal display device having low cost and easy tube current measurement by modifying a shape of a light emitting lamp.
도 1은 종래의 액정표시장치용 백라이트의 사시도.1 is a perspective view of a backlight for a conventional liquid crystal display device.
도 2는 종래의 액정표시장치용 백라이트의 평면도.2 is a plan view of a backlight for a conventional liquid crystal display device.
도 3은 본 발명의 실시예에 따른 발광램프의 사시도.3 is a perspective view of a light emitting lamp according to an embodiment of the present invention.
도 4는 본 발명의 실시예에 따른 액정표시장치용 백라이트의 평면도.4 is a plan view of a backlight for a liquid crystal display according to an exemplary embodiment of the present invention.
* 도면의 주요 부분에 대한 부호 설명 *Explanation of symbols on the main parts of the drawings
20 : 발광램프22 : 전극20: light emitting lamp 22: electrode
29, 29a : 전원인입선30 : 커넥터29, 29a: Power lead-in wire 30: Connector
40 : 지지대50 : 가이드부40: support 50: guide
60 : 램프고정부70 : 인버터60: lamp fixing 70: inverter
80 : 단자100 : 백라이트80 Terminal 100 Backlight
상기 목적 달성을 위한 본 발명의 액정표시장치용 백라이트는 U자 형상의 발광램프들; 상기 발광램프에 전압을 전달하는 전원인입선; 상기 발광램프의 한쪽 끝단에서 상기 전원인입선에 연결되며 직류 전압을 상기 발광램프에 적합한 교류 전압으로 변환하여 상기 발광램프에 제공하는 인버터; 상기 발광램프를 지지하는 지지대; 및 상기 발광램프간의 일정간격 유지, 상기 발광램프의 삽입 및 탈거를 용이하게 하는 가이드부를 포함하여 이루어지는 것을 특징으로 한다.The backlight for the liquid crystal display device of the present invention for achieving the above object is U-shaped light emitting lamps; A power lead wire for transferring a voltage to the light emitting lamp; An inverter connected to the power lead wire at one end of the light emitting lamp and converting a DC voltage into an AC voltage suitable for the light emitting lamp and providing the light to the light emitting lamp; A support for supporting the light emitting lamp; And it characterized in that it comprises a guide to facilitate the maintenance of a constant interval between the light emitting lamp, the insertion and removal of the light emitting lamp.
이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명하도록 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명의 실시예에 따른 발광램프의 사시도이고, 도 4는 본 발명의 실시예에 따른 액정표시장치용 백라이트를 설명하기 위한 평면도이다.3 is a perspective view of a light emitting lamp according to an embodiment of the present invention, Figure 4 is a plan view for explaining a backlight for a liquid crystal display device according to an embodiment of the present invention.
도시된 바와 같이, 본 발명의 실시예에 따른 액정표시장치의 백라이트는 냉음극관 램프(Cold Cathode Fluorescent Lamp :CCFL)인 다수 개의 발광램프(20)를 구비한다. 도면에는 설명을 용이하게 하기 위하여 하나의 발광램프(20)가 도시되었다. 상기 발광램프(20)는 바람직하게 U자 형상으로 제조되어 종래의 액정표시장치용 백라이트의 근본적인 문제점들을 방지할 수 있다.As illustrated, the backlight of the liquid crystal display according to the exemplary embodiment of the present invention includes a plurality of light emitting lamps 20 which are cold cathode lamps (CCFLs). In the figure, one light emitting lamp 20 is shown for ease of explanation. The light emitting lamp 20 is preferably manufactured in a U shape to prevent fundamental problems of the backlight for a conventional liquid crystal display device.
상기 발광램프(20)는 내벽에 형광체가 코팅되어 있으며, 외부 양단에 전기적으로 도통되도록 도전체인 전극(22)이 형성되어 있다. 그리고, 발광 램프(20)의 양쪽 전극(22)에는 램프 구동을 위한 전원을 전달하는 전원인입선(29,29a)이 연결되고, 상기 전원인입선(29,29a)은 별도의 커넥터(30)에 연결되어 구동회로와 접속된다. 이때, 하나의 발광램프(20)의 양단 전극(22)이 서로 인접해 있어, 이와 연결되는 전원인입선(29)(29a)이 하나의 커넥터(30)에 묶여진다.The light emitting lamp 20 has a phosphor coated on an inner wall thereof, and an electrode 22, which is a conductor, is formed to be electrically connected to both ends of the light emitting lamp 20. In addition, power inlets 29 and 29a for transmitting power for driving the lamps are connected to both electrodes 22 of the light emitting lamp 20, and the power inlets 29 and 29a are connected to a separate connector 30. And is connected to the driving circuit. At this time, the electrodes 22 of both light emitting lamps 20 are adjacent to each other, so that the power lead wires 29 and 29a connected thereto are tied to one connector 30.
이러한 다수의 발광램프(20)들은 액정표시장치용 백라이트에 삽입되어 발광하게 된다.The plurality of light emitting lamps 20 are inserted into the backlight for the liquid crystal display to emit light.
도 4는 본 발명의 실시예에 따른 액정표시장치용 백라이트에 관한 도면이다. 도시된 바와 같이, 상기 다수의 U자형 발광램프(20)들이 백라이트(100)에 장착되어 있다.4 is a view of a backlight for a liquid crystal display according to an embodiment of the present invention. As shown, the plurality of U-shaped light emitting lamps 20 are mounted on the backlight 100.
상기 다수의 발광램프(20)들은 백라이트(100) 하부면의 지지대(40)를 통하여 백라이트(100)내에 고정되며, 발광램프(20)의 파손을 예방할 수 있다. 상기 지지대(40)는 빛이 투과할 수 있도록 투명 지지대로 구성된다.The plurality of light emitting lamps 20 may be fixed in the backlight 100 through the support 40 of the lower surface of the backlight 100, and may prevent damage of the light emitting lamp 20. The support 40 is composed of a transparent support so that light can pass through.
또한, 본 발명의 백라이트(100)는 상기 다수의 발광램프(20)들의 간격이 일정하게 유지될 수 있고, 상기 백라이트(100)로의 삽입 및 탈거를 손쉽게 할 수 있도록 하는 가이드부(50)를 구비한다. 이에 의해 발광램프(20)의 조립 및 교체 작업시간을 단축할 수 있다.In addition, the backlight 100 of the present invention may be maintained at a constant interval of the plurality of light emitting lamps 20, and has a guide portion 50 to facilitate the insertion and removal of the backlight 100. do. As a result, the assembly and replacement work time of the light emitting lamp 20 can be shortened.
또한, 본 발명의 백라이트(100)는 상기 발광램프(20)의 양단을 삽입할 수 있는 램프고정부(60)를 구비한다. 상기 램프고정부(60)는 램프홀더(60a)와 램프고정나사(60b)로 이루어져 상기 발광램프(20)가 삽입, 고정된다. 상기 램프고정부(60)내에는 상기 전원인입선(29)(29a)이 연결되어 있으며, 상기 전원인입선(29)(29a)는 커넥터(30)와 연결되어 있다. 따라서, 상기 발광램프를 상기 램프고정부(60)에 삽입하면 발광램프의 양단 전극이 상기 전원인입선(29)(29a)에 접속된다.In addition, the backlight 100 of the present invention includes a lamp fixing part 60 into which both ends of the light emitting lamp 20 can be inserted. The lamp fixing part 60 includes a lamp holder 60a and a lamp fixing screw 60b to which the light emitting lamp 20 is inserted and fixed. The power lead wires 29 and 29 a are connected to the lamp fixing part 60, and the power lead wires 29 and 29 a are connected to the connector 30. Therefore, when the light emitting lamp is inserted into the lamp fixing part 60, the electrodes at both ends of the light emitting lamp are connected to the power lead wires 29 and 29a.
상기 다수의 발광램프(20)의 한쪽에는 AC 어댑터 또는 배터리로부터 제공되는 직류 전압을 발광램프(20)에 적합한 일정 주파수 및 전압레벨을 갖는 교류 전압으로 변환하여 제공하는 DC/AC 인버터(70)가 구비되어 있다. 상기 인버터(70)의 단자(80)는 고압측 및 저압측이 일체화되어 있다. 이러한 인버터(70)의 단자(80)에 상기 커넥터(30)가 접속되면, 발광램프(20)에 교류 전류가 흘러 발광램프(20)를 발광시킨다. 이때, 발광램프(20) 양단 전극(22)간의 서로간의 거리가 가까워 관전류를 측정하기가 용이하므로, 정확한 휘도를 측정할 수 있다.One of the plurality of light emitting lamps 20 includes a DC / AC inverter 70 for converting a DC voltage provided from an AC adapter or a battery into an AC voltage having a predetermined frequency and voltage level suitable for the light emitting lamp 20. It is provided. The terminal 80 of the inverter 70 is integrated with the high pressure side and the low pressure side. When the connector 30 is connected to the terminal 80 of the inverter 70, an alternating current flows through the light emitting lamp 20 to emit the light emitting lamp 20. In this case, since the distance between the electrodes 22 between the light emitting lamps 20 is close to each other, it is easy to measure the tube current, so that accurate luminance can be measured.
또한, 상기 인버터(70)의 단자(80)가 고압측 및 저압측이 일체화되어 있어, 하나의 인쇄회로기판으로 종래 2개의 인쇄회로기판을 대신할 수 있어, 생산비용을 절감할 수 있다.In addition, since the terminal 80 of the inverter 70 is integrated with the high pressure side and the low pressure side, it is possible to replace the conventional two printed circuit boards with one printed circuit board, thereby reducing the production cost.
이상에서 설명한 본 발명은 상술한 실시예 및 첨부된 도면에 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위내에서 여러 가지 치환, 변형 및 변경이 가능하다는 것이 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어 명백할 것이다.The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.
상술한 본 발명의 액정표시장치용 백라이트는 다음과 같은 효과가 있다.The backlight for the liquid crystal display device of the present invention described above has the following effects.
첫째, 발광램프를 U자 형상으로 제조함으로써, 상기 발광램프 양단 전극간의 서로간의 거리가 가까워 관전류를 측정하기가 용이하므로, 정확한 휘도를 측정할 수 있다.First, since the light emitting lamp is U-shaped, the distance between the electrodes of the light emitting lamp is close to each other so that the tube current can be easily measured, so that the correct luminance can be measured.
둘째, 상기 다수의 발광램프들의 간격이 일정하게 유지될 수 있고, 상기 백라이트로의 삽입 및 탈거를 손쉽게 할 수 있도록 하는 가이드부를 구비함으로써, 상기 발광램프의 조립 및 교체 작업시간을 단축할 수 있다.Second, the spacing of the plurality of light emitting lamps can be kept constant, and by providing a guide for easily inserting and removing the backlight, it is possible to shorten the assembly and replacement work time of the light emitting lamp.
셋째, 인버터의 단자가 고압측 및 저압측이 일체화되어 있어, 하나의 인쇄회로기판으로 종래 2개의 인쇄회로기판을 대신할 수 있어, 생산 비용을 절감할 수 있다.Third, since the terminal of the inverter is integrated with the high voltage side and the low pressure side, one printed circuit board can replace two conventional printed circuit boards, thereby reducing the production cost.
Claims (5)
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Cited By (3)
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KR100666915B1 (en) * | 2004-06-25 | 2007-01-11 | 엠알시 (주) | Flat lighting lamp device |
KR101301954B1 (en) * | 2006-06-30 | 2013-08-30 | 엘지디스플레이 주식회사 | backlight unit for Liquid crystal display module the same |
US9876346B2 (en) | 2012-01-11 | 2018-01-23 | Emerson Climate Technologies, Inc. | System and method for compressor motor protection |
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JPH0772476A (en) * | 1993-09-02 | 1995-03-17 | Harrison Denki Kk | Illumination device |
JPH07262816A (en) * | 1994-03-23 | 1995-10-13 | Nec Home Electron Ltd | Back light unit |
JPH07272521A (en) * | 1994-03-29 | 1995-10-20 | Nec Home Electron Ltd | Backlight unit |
JPH0845327A (en) * | 1994-07-29 | 1996-02-16 | Toshiba Lighting & Technol Corp | Backlight and liquid-crystal display device using this backlight |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR100666915B1 (en) * | 2004-06-25 | 2007-01-11 | 엠알시 (주) | Flat lighting lamp device |
KR101301954B1 (en) * | 2006-06-30 | 2013-08-30 | 엘지디스플레이 주식회사 | backlight unit for Liquid crystal display module the same |
US9876346B2 (en) | 2012-01-11 | 2018-01-23 | Emerson Climate Technologies, Inc. | System and method for compressor motor protection |
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