KR20010039117A - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- KR20010039117A KR20010039117A KR1019990047366A KR19990047366A KR20010039117A KR 20010039117 A KR20010039117 A KR 20010039117A KR 1019990047366 A KR1019990047366 A KR 1019990047366A KR 19990047366 A KR19990047366 A KR 19990047366A KR 20010039117 A KR20010039117 A KR 20010039117A
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- lamp
- light guide
- light
- lamps
- guide plate
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133314—Back frames
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/13332—Front frames
Abstract
Description
본 발명은 액정표시장치에 관한 것으로, 더욱 상세하게는 램프 유닛을 도광판의 네변에 각각 설치하여 액정표시장치의 휘도를 향상시키고, 각 램프 유닛에 설치된 램프들의 열방출을 최소화하여 제품의 신뢰성을 향상시키는 액정표시장치에 관한 것이다The present invention relates to a liquid crystal display device, and more particularly, to install a lamp unit on each side of the light guide plate to improve the brightness of the liquid crystal display device, and to minimize the heat emission of the lamps installed in each lamp unit to improve the reliability of the product Relates to a liquid crystal display device
최근, CRT(Cathode Ray Tube)를 대체하기 위해서 개발되고 있는 액정표시장치는 소형, 경량화 및 저소비전력 등의 장점을 가지고 있어 랩탑형 컴퓨터 및 데스크탑형 컴퓨터뿐만 아니라 대형의 정보 표시장치 등으로 사용되고 있다.Recently, liquid crystal displays developed to replace CRTs (Cathode Ray Tubes) have advantages such as small size, light weight, and low power consumption, and thus are used as large-scale information displays as well as laptop computers and desktop computers.
이와 같은 액정표시장치는 자기 발광을 하지 않기 때문에 LCD 패널을 투과한 외래광을 반사시켜 정보를 표시하거나, 또는 LCD 패널의 배면에 별도의 광원, 즉 백라이트 어셈블리를 설치하여 정보를 표시한다.Since the LCD does not emit light, the LCD displays information by reflecting extraneous light passing through the LCD panel, or displays an information by installing a separate light source on the back of the LCD panel.
백라이트 어셈블리는 빛을 발산시키는 램프 유닛, 램프 유닛에서 발산된 빛을 LCD 패널 쪽으로 안내하는 도광판 또는 확산판, 도광판으로부터 전달된 빛의 휘도를 상승시키는 광학시트들을 포함한다.The backlight assembly includes a lamp unit for emitting light, a light guide plate or diffuser plate for guiding the light emitted from the lamp unit toward the LCD panel, and optical sheets for increasing the luminance of light transmitted from the light guide plate.
이들 부재들 중 램프 유닛은 액정표시장치의 광원으로 사용되는 램프, 램프에서 발산된 빛을 도광판 또는 확산판 쪽으로 반사시켜 빛의 효율을 상승시키는 램프 반사판, 와이어에 의해 램프와 전기적으로 연결되어 램프에 전원을 인가하는 인버터로 구성된다.Among these members, the lamp unit is a lamp used as a light source of a liquid crystal display, a lamp reflector which reflects light emitted from the lamp toward a light guide plate or a diffuser plate, and increases the efficiency of light, and is electrically connected to the lamp by a wire. It consists of an inverter to apply power.
최근, 액정표시장치는 랩탑형 컴퓨터의 표시부뿐만 아니라 데스크탑형 컴퓨터의 모니터 및 텔레비전 등과 같이 그 사용범위가 급속도로 확대되고, 액정표시장치의 사이즈도 점점 대형화되면서 액정표시장치의 휘도가 중요한 문제로 대두되었다.In recent years, the liquid crystal display device is rapidly increasing its use range as well as the display unit of a laptop computer, a monitor and a television of a desktop computer, and the size of the liquid crystal display device is gradually increased. It became.
이로 인해, 대형의 액정표시장치에서는 확산판의 하부면에 복수개의 램프들을 설치하여 빛을 조사하는 직하방식이 적용되고 있으며, 도광판의 측면에 램프 유닛을 설치하는 에지방식의 경우에는 도광판의 폭방향 측면에 설치되는 램프 유닛에 2개 또는 3개의 램프들을 도광판에 대하여 수직 또는 수평으로 설치함으로써, 대형 액정표시장치의 휘도에 적극 대응하고 있다.For this reason, in a large liquid crystal display device, a direct method of irradiating light by installing a plurality of lamps on the bottom surface of the diffuser plate is applied. By mounting two or three lamps vertically or horizontally with respect to the light guide plate in the lamp unit provided on the side surface, it actively corresponds to the brightness of the large liquid crystal display device.
그러나, 에지방식에서 하나의 램프 유닛에 2의 램프들이 설치될 경우 램프의 광량이 한정되어 있어 액정표시장치가 점점 대형화되면 고휘도 대응이 어렵다.However, when two lamps are installed in one lamp unit in the edge method, the light amount of the lamp is limited, so that the LCD becomes difficult to cope with high brightness.
또한, 램프 유닛에 3개의 램프들이 설치될 경우에 휘도는 어느정도 달성되지만 3개의 램프에서 발생되는 약 60∼74℃의 열로 인해 램프 유닛의 온도가 상승되어 여러가지 문제가 발생된다. 첫번째는 각 유닛에 설치된 램프들이 열화되어 램프의 수명이 짧아지고, 두번째는 램프들에서 방출되는 열로 인해 램프 반사판이 열화되어 램프 반사판의 성능이 저하되며, 세번째는 램프 양단에 설치된 램프 홀더 및 램프 유닛과 인접한 몰드 프레임이 램프에서 방출되는 열에 의해 녹아 변형된다.In addition, when three lamps are installed in the lamp unit, the luminance is achieved to some extent, but the temperature of the lamp unit is increased due to the heat of about 60 to 74 ° C generated by the three lamps, which causes various problems. First, the lamps installed in each unit deteriorate, which shortens the life of the lamp. Second, the lamp reflector deteriorates due to deterioration of the lamp reflector due to heat emitted from the lamps. Third, lamp holders and lamp units installed at both ends of the lamp deteriorate. The mold frame adjacent to the melt is deformed by the heat emitted from the lamp.
따라서, 본 발명의 목적은 상기와 같은 문제점을 감안하여 안출된 것으로써, 액정표시장치의 휘도를 향상시키는데 있다.Accordingly, an object of the present invention has been devised in view of the above problems, and is to improve the brightness of a liquid crystal display device.
본 발명의 다른 목적은 각 램프 유닛에서 발생되는 열의 온도를 낮춰 램프 반사판, 램프 홀더 및 몰드프레임이 변형되거나 성능이 저하되는 것을 방지하여 제품의 신뢰성을 향상시키는데 있다.Another object of the present invention is to lower the temperature of heat generated in each lamp unit to prevent the lamp reflector, lamp holder and mold frame from being deformed or deteriorated, thereby improving the reliability of the product.
본 발명의 또 다른 목적은 다음의 상세한 설명과 첨부된 도면으로부터 보다 명확해 질 것이다.Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.
도 1은 본 발명에 의한 액정표시장치의 구조를 나타낸 분해 사시도.1 is an exploded perspective view showing the structure of a liquid crystal display according to the present invention.
도 2는 램프 유닛들이 도광판에 배치된 상태를 나타낸 도광판의 배면도.2 is a rear view of the light guide plate showing a state in which the lamp units are disposed on the light guide plate.
이와 같은 목적을 달성하기 위해서 본 발명은 수납공간이 형성되고 각 측면의 일단부에 서로 인접되지 않도록 슬라이딩부가 형성된 몰드 프레임과, 수납공간에 수용되어 빛을 안내하는 도광판과, 도광판의 네 측벽에 각각 하나씩 설치되며 일단에 핫전극이 형성되고 타단에 콜드전극이 형성되어 빛을 발산하는 적어도 2개이상의 램프들와 램프들을 감싸며 도광판 쪽으로 빛을 반사시키는 램프 반사판 및 램프들의 양단에 끼워져 램프를 보호하는 램프 홀더를 구비하는 램프 유닛들과, 도광판의 상부면에 설치되어 빛의 휘도를 상승시키는 광학시트들과, 광학시트들의 상부면에 설치되어 정보를 표시하는 LCD 패널과, 몰드 프레임의 상부에서 덮여져 LCD 패널을 지지하며 슬라이드부와 대응되는 측면에 슬라이드부가 형성된 탑샤시로 구성된다.In order to achieve the above object, the present invention provides a mold frame in which a storage space is formed and a sliding part is formed so as not to be adjacent to each other at one end of each side, a light guide plate accommodated in the storage space, and guides light to each of the four sidewalls of the light guide plate. It is installed one by one, and a hot electrode is formed at one end and a cold electrode is formed at the other end to cover at least two or more lamps and lamps that emit light, and to reflect the light toward the light guide plate, and a lamp holder that is fitted to both ends of the lamps to protect the lamp. Lamp units having a light guide plate, an optical sheet installed on the upper surface of the light guide plate to increase the brightness of the light, an LCD panel installed on the upper surface of the optical sheets for displaying information, and covered on the upper portion of the mold frame LCD It consists of a top chassis supporting the panel and having a slide portion formed on a side surface corresponding to the slide portion.
바람직하게, 하나의 램프 유닛에는 2개씩의 램프들이 설치된다.Preferably, one lamp unit is provided with two lamps.
이하, 본 발명에 의한 액정표시장치의 구조를 첨부된 도면 도 1과 도 2를 참조하여 설명하면 다음과 같다.Hereinafter, the structure of the liquid crystal display according to the present invention will be described with reference to FIGS. 1 and 2.
본 발명에 의한 액정표시장치(100)는 도 1에 도시된 바와 같이 크게 수납공간이 형성된 몰드 프레임(110), 몰드 프레임(110)의 수납공간에 수납되어 빛을 반사하는 반사판(미도시), 반사판의 상부면에 적층되어 빛을 안내하는 도광판(120), 도광판(120)의 네측면에 설치되어 빛을 발산하는 램프 유닛들(130a,130b,130c,130d), 도광판(120)의 상부면에 적층되어 빛의 휘도를 상승시키는 광학시트들(140), 몰드 프레임(110)의 하부면에 체결되어 수납공간에 수납된 상기 부재들을 지지하는 바텀샤시(150), 몰드 프레임(110)의 상부면에 수용되어 정보를 표시하는 LCD 패널(160) 및 몰드 프레임(110)과 바텀샤시(150)에 체결되어 액정패널(160)을 지지하는 탑샤시(170)로 구성된다.As shown in FIG. 1, the liquid crystal display device 100 according to the present invention includes a mold frame 110 having a large storage space, a reflective plate (not shown) that is accommodated in the storage space of the mold frame 110 and reflects light; The light guide plate 120 which is stacked on the upper surface of the reflecting plate to guide light, the lamp units 130a, 130b, 130c, and 130d which are installed on four sides of the light guide plate 120 to emit light, and the top surface of the light guide plate 120. The optical sheets 140 stacked on the upper side to increase the brightness of the light, the bottom chassis 150 is fastened to the lower surface of the mold frame 110 to support the members stored in the storage space, the upper portion of the mold frame 110 The LCD panel 160 and the mold frame 110 and the bottom chassis 150 that are accommodated on the surface and are displayed on the surface thereof are configured to support the liquid crystal panel 160.
이들 중 몰드 프레임(110)은 직사각형 형상으로 상부면과 하부면에 수납공간이 형성되는데, 몰드 프레임(110)의 하부면 쪽에 형성되는 수납공간에는 반사판, 도광판(120) 및 광학시트들(140)이 차례대로 적층되고, 도광판(120)의 네측면과 수납공간의 측벽 사이에는 램프 유닛들(130a,130b,130c,130d)이 설치된다.Of these, the mold frame 110 has a rectangular shape and an accommodating space is formed on the upper and lower surfaces thereof. The accommodating space formed on the lower surface of the mold frame 110 includes a reflecting plate, a light guide plate 120, and optical sheets 140. Stacked in this order, the lamp units 130a, 130b, 130c, and 130d are installed between the four sides of the light guide plate 120 and the side walls of the storage space.
그리고, 몰드 프레임(110)의 상부면에 형성되는 수납공간의 내부에는 LCD 패널(160)이 수용되며, 수납공간의 기저면에는 LCD 패널(150)의 화면표시영역보다 큰 오픈 영역이 형성되어 광학시트들(140)에서 출사된 빛이 LCD 패널(160)의 배면으로 입사될 수 있도록 한다.The LCD panel 160 is accommodated in the storage space formed on the upper surface of the mold frame 110, and an open area larger than the screen display area of the LCD panel 150 is formed on the base surface of the storage space. The light emitted from the field 140 may be incident to the rear surface of the LCD panel 160.
그리고, 몰드 프레임(110)의 각 측벽들 중 4개의 램프 유닛들(130a,130b,130c,130d)의 길이방향 일측면과 대응되는 부분에는 램프 유닛들(130a,130b,130c,130d)을 액정표시장치(100)에서 슬라이딩 방식으로 분해, 조립하기 위한 슬라이드부(115)가 형성된다.Then, the lamp units 130a, 130b, 130c, and 130d are liquid crystals at portions corresponding to one side surface of the four lamp units 130a, 130b, 130c, and 130d of the sidewalls of the mold frame 110. In the display device 100, a slide unit 115 for disassembling and assembling in a sliding manner is formed.
또한, 본 발명에 따르면 도광판(120)의 각 측면에 설치되는 4개의 램프 유닛들(130a,130b,130c,130d) 각각은 크게 일단에 핫전극이 형성되고 타단에 콜드 전극이 형성되어 빛을 발산하는 2개의 램프들(132)과, 램프들(132)의 양단에 각각 삽입되어 램프(132)를 보호하는 램프 홀더(134)와, 램프들(132)의 외주면을 감싸고 있어 램프(132)에서 발산된 빛을 도광판(120)의 측면으로 반사시키는 램프 반사판(136) 및 램프(132)의 핫전극 및 콜드 전극과 와이어(미도시)를 통해 연결되어 각각의 램프들(132)에 구동전류를 인가하는 인버터(미도시)로 구성된다.In addition, according to the present invention, each of the four lamp units 130a, 130b, 130c, and 130d installed on each side of the light guide plate 120 has a hot electrode formed at one end and a cold electrode formed at the other end to emit light. Two lamps 132, a lamp holder 134 inserted into both ends of the lamps 132 to protect the lamp 132, and an outer circumferential surface of the lamps 132. The lamp reflector 136 reflecting the emitted light to the side of the light guide plate 120 and the hot electrode and the cold electrode of the lamp 132 are connected to each other through a wire (not shown) to supply driving currents to the respective lamps 132. It consists of an inverter (not shown) to apply.
여기서, 램프 커버(136) 중 핫전극 쪽에는 몰드 프레임(110)의 수납공간으로부터 램프 유닛들(130a,130b,130c,130d)을 용이하게 분해, 조립할 수 있도록 손잡이(138)가 형성되며, 손잡이(138)와 램프 홀더(134) 사이의 램프 커버(136)에는 바텀샤시(150)에 램프 유닛들(130a,130b,130c,130d)을 고정시키기 위한 암나사부(139)가 형성된다.Here, a handle 138 is formed on the hot electrode side of the lamp cover 136 to easily disassemble and assemble the lamp units 130a, 130b, 130c, and 130d from the storage space of the mold frame 110. The lamp cover 136 between the 138 and the lamp holder 134 is formed with a female screw part 139 for fixing the lamp units 130a, 130b, 130c, and 130d to the bottom chassis 150.
한편, 바텀샤시(150)는 몰드 프레임(110)의 하부면에서 체결되어 도광판(120) 및 램프 유닛들(130a,130b,130c,130d)이 설치된 수납공간을 폐쇄시켜 도광판(120), 램프 유닛들(130a,130b,130c,130d), 광학시트들(140)을 지지하는데, 몰드 프레임(110)의 슬라이드부(115)와 대응되는 부분에는 램프 유닛들(130a,130b,130c,130d)의 핫측 부분을 액정표시장치(100)의 외부로 노출시키기 위한 슬라이드부(115)가 형성되며, 암나사부(139)와 대응되는 부분에는 수나사(180)가 체결될 수 있도록 암나사부(159)가 형성된다.On the other hand, the bottom chassis 150 is fastened on the lower surface of the mold frame 110 to close the storage space in which the light guide plate 120 and the lamp units 130a, 130b, 130c, and 130d are installed, thereby guiding the light guide plate 120 and the lamp unit. Of the lamp units 130a, 130b, 130c, and 130d, which support the optical sheets 140 and the optical sheets 140, corresponding to the slide portion 115 of the mold frame 110. A slide portion 115 is formed to expose the hot side portion to the outside of the liquid crystal display device 100, and a female screw portion 159 is formed at a portion corresponding to the female screw portion 139 so that the male screw 180 may be fastened. do.
한편, 몰드 프레임(110)의 상부면에서 덮여지는 탑샤시(170)에도 몰드 프레임(110)과 바텀샤시(150)의 슬라이드부(115,155)와 대응되는 부분에도 슬라이드부(175)가 형성된다.On the other hand, the slide portion 175 is also formed in the top chassis 170 covered by the upper surface of the mold frame 110 corresponding to the slide portions 115 and 155 of the mold frame 110 and the bottom chassis 150.
여기서, 몰드 프레임(110), 바텀샤시(150) 및 탑샤시(170)의 슬라이드부(115,155,175)는 램프 유닛들(130a,130b,130c,130d)의 핫측부분과 대응되는 부분에 형성되며, 램프 유닛들(130a,130b,130c,130d)은 핫측부분이 서로에 대해 마주보지 않도록 도광판(120)의 어느 한방향을 따라 네 측면에 각각 설치된다.Here, the slides 115, 155, and 175 of the mold frame 110, the bottom chassis 150, and the top chassis 170 are formed at portions corresponding to the hot side portions of the lamp units 130a, 130b, 130c, and 130d, and the lamps. The units 130a, 130b, 130c, and 130d are respectively provided on four sides along one direction of the light guide plate 120 such that the hot side portions do not face each other.
즉, 도 1과 도 2에 도시된 바와 같이 도광판(120)의 장변에 설치되는 2개의 램프 유닛들(130a,130c) 중 하나의 램프 유닛(130a)의 핫측부분은 도광판(120)의 장변 일단에 위치하며, 나머지 하나의 램프 유닛(130c)는 이와는 반대가 되도록 설치되는데, 핫측부분이 도광판(120)의 장변 타측에 위치한다.That is, as shown in FIGS. 1 and 2, the hot side portion of one lamp unit 130a of the two lamp units 130a and 130c installed at the long side of the light guide plate 120 may have one long side of the light guide plate 120. Located in, the other lamp unit 130c is installed to be opposite to this, the hot side is located on the other side of the long side of the light guide plate (120).
그리고, 도광판(120)의 단변에 설치되는 2개의 램프 유닛들(130b,130d) 중 하나의 램프 유닛(130b)핫측 부분은 도광판(120)의 단변 일단에 위치하고, 나머지 하나의 램프 유닛(130d)의 핫측부분은 이와 반대로 도광판(120)의 단변 타측에 위치한다.Then, one of the lamp unit 130b of the two lamp units 130b and 130d installed at the short side of the light guide plate 120 is located at one end of the short side of the light guide plate 120, and the other lamp unit 130d is provided. On the contrary, the hot side of the light guide plate 120 is located on the other side of the short side.
이와 같이 구성된 액정표시장치에서 램프 유닛의 교체 방법에 대해 설명하면 다음과 같다.The replacement method of the lamp unit in the liquid crystal display device configured as described above is as follows.
몰드 프레임(110)의 수납공간에 반사판, 도광판(120) 및 광학시트들(140)이 차례대로 적층되고, 도광판(120)의 네 측면에 램프 유닛들(130a,130b,130c,130d)이 각각 설치된 후 몰드 프레임(110)의 수납공간에 수용된 부재들을 지지하기 위해서 몰드 프레임(110)의 하부면에 바텀샤시(150)를 체결한다.The reflective plate, the light guide plate 120, and the optical sheets 140 are sequentially stacked in the storage space of the mold frame 110, and lamp units 130a, 130b, 130c, and 130d are disposed on four sides of the light guide plate 120, respectively. After installation, the bottom chassis 150 is fastened to the lower surface of the mold frame 110 to support the members accommodated in the storage space of the mold frame 110.
이어, 몰드 프레임(110)의 수납공간에 정표를 표시하는 LCD 패널(160)을 올려놓고, LCD 패널(160)의 상부면에서 탑샤시(170)를 덮어 LCD 패널(160)을 지지한다.Subsequently, the LCD panel 160 displaying the mark is placed in the storage space of the mold frame 110, and the LCD panel 160 is supported by covering the top chassis 170 on the upper surface of the LCD panel 160.
이와 같은 과정을 통해 액정표시장치(100)가 조립된 후 소정시간이 경과하면 각 램프 유닛들(130a,130b,130c,130d)에 설치된 2개의 램프들(132) 중 어느 하나 또는 전부가 수명으로 인해 점등되지 않는다.After a predetermined time has elapsed after the liquid crystal display device 100 is assembled through the above process, any one or all of the two lamps 132 installed in the lamp units 130a, 130b, 130c, and 130d have a lifetime. Does not light up.
이 경우 작업자는 몰드 프레임(110), 바텀샤시(150), 탑샤시(170)의 측면에 설치된 슬라이드부(115,155,175)를 통해 외부로 노출된 램프 커버(136)의 손잡이(138)를 잡아당겨 램프 유닛들(130a,130b,130c,130d)을 액정표시장치(100)의 외부로 슬라이딩시키고, 새로운 램프 유닛들(130a,130b,130c,130d)을 슬라이딩 방식으로 도광판(120)의 측면에 조립한다.In this case, the operator pulls the handle 138 of the lamp cover 136 exposed to the outside through the slide parts 115, 155, and 175 installed on the sides of the mold frame 110, the bottom chassis 150, and the top chassis 170. The units 130a, 130b, 130c, and 130d are slid to the outside of the liquid crystal display 100, and the new lamp units 130a, 130b, 130c, and 130d are assembled to the side of the light guide plate 120 in a sliding manner. .
이때, 4개의 램프 유닛들(130a,130b,130c,130d)을 슬라이딩시키기 위한 슬라이드부(115,155,175)는 각 램프 유닛들(130a,130b,130c,130d)이 서로를 간섭하지 않고 액정표시장치(100)로부터 용이하가 분해와 조립이 되도록 서로 인접하지 않도록 각 측면에 하나씩 설치되며, 램프 유닛들(130a,130b,130c,130d)의 손잡이(138)가 슬라이드부(115,155,175)쪽에 위치하게 된다.In this case, the slide units 115, 155, and 175 for sliding the four lamp units 130a, 130b, 130c, and 130d do not interfere with each other and the liquid crystal display device 100 does not interfere with each other. One side of each of the lamp units 130a, 130b, 130c, and 130d of the lamp units 130 are positioned on the slide parts 115, 155, and 175 so as to be easily disassembled and assembled.
이와 같이 램프 유닛들(130a,130b,130c,130d) 각각에 램프를 2개씩 설치하고, 도광판(120)의 네측면 각각에 하나씩의 램프 유닛들(130a,130b,130c,130d)을 설치할 경우, 램프들(132) 수의 증가로 액정표시장치(100)의 휘도가 상승된다.As such, when two lamps are installed in each of the lamp units 130a, 130b, 130c, and 130d, and one lamp unit 130a, 130b, 130c, and 130d is installed in each of four sides of the light guide plate 120, As the number of lamps 132 increases, the luminance of the LCD 100 increases.
또한, 각 램프 유닛들(130a,130b,130c,130d)에 2개씩의 램프들(132)만이 설치되기 때문에 각 램프 유닛들(130a,130b,130c,130d)에서 발생되는 열은 3개의 램프들(132)이 설치된 램프 유닛들(130a,130b,130c,130d)에서 발생되는 열에 비해 줄어들어 램프들(132)의 수명이 길어지고, 몰드 프레임(110) 및 램프 홀더들(134)의 변형이 최소화되고, 램프 반사판(136)으로부터 빛이 균일하게 반사된다.In addition, since only two lamps 132 are installed in each of the lamp units 130a, 130b, 130c, and 130d, the heat generated from each lamp unit 130a, 130b, 130c, and 130d is three lamps. Compared to the heat generated by the lamp units 130a, 130b, 130c, and 130d installed, the life of the lamps 132 is long, and deformation of the mold frame 110 and the lamp holders 134 is minimized. The light is uniformly reflected from the lamp reflector 136.
이상에서 설명한 바와 같이 본 발명은 각 램프 유닛에 램프를 2개씩 설치한 다음 도광판의 네 측면 램프 유닛들을 각각 설치하여 액정표시장치의 휘도를 향상시키고, 각 램프 유닛에서 발출되는 램프의 온도를 저하시켜 램프 및 램프 커버의 수명을 증가시키며, 몰드 몰드프레임과 램프 홀더의 변형이 최소화됨으로써, 액정표시장치의 신뢰성이 향상시킬 수 있는 효과가 있다.As described above, the present invention installs two lamps in each lamp unit, and then installs four side lamp units of the light guide plate, thereby improving the brightness of the liquid crystal display device and lowering the temperature of the lamps emitted from each lamp unit. The lifetime of the lamp and the lamp cover is increased, and deformation of the mold mold frame and the lamp holder is minimized, thereby improving the reliability of the liquid crystal display.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019990047366A KR100662878B1 (en) | 1999-10-29 | 1999-10-29 | Liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019990047366A KR100662878B1 (en) | 1999-10-29 | 1999-10-29 | Liquid crystal display |
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| KR100662878B1 KR100662878B1 (en) | 2006-12-28 |
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| KR101221126B1 (en) * | 2005-12-30 | 2013-01-10 | 엘지디스플레이 주식회사 | Backlight assembly and liquid crystal display device having the same |
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| JPS63309918A (en) * | 1988-04-25 | 1988-12-19 | Tatsuji Mizobe | Back light device |
| JP2823993B2 (en) * | 1992-08-03 | 1998-11-11 | シャープ株式会社 | Liquid crystal display |
| JPH10289606A (en) * | 1997-04-11 | 1998-10-27 | Toshiba Lighting & Technol Corp | Back light and liquid crystal display device therewith |
| KR100455938B1 (en) * | 1997-04-29 | 2005-04-08 | 삼성전자주식회사 | Lamp assembly structure for LCD backlight device |
| KR19990035563A (en) * | 1997-10-31 | 1999-05-15 | 윤종용 | LCD module's backlight |
| KR100523271B1 (en) * | 1998-03-31 | 2005-12-30 | 삼성전자주식회사 | LCD Module |
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| KR101221126B1 (en) * | 2005-12-30 | 2013-01-10 | 엘지디스플레이 주식회사 | Backlight assembly and liquid crystal display device having the same |
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