KR20020078490A - Back light unit for liquid crystal display device - Google Patents
Back light unit for liquid crystal display device Download PDFInfo
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- KR20020078490A KR20020078490A KR1020010017609A KR20010017609A KR20020078490A KR 20020078490 A KR20020078490 A KR 20020078490A KR 1020010017609 A KR1020010017609 A KR 1020010017609A KR 20010017609 A KR20010017609 A KR 20010017609A KR 20020078490 A KR20020078490 A KR 20020078490A
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- light
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- liquid crystal
- crystal display
- display device
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Classifications
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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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- 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
- F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
-
- 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
- G02B6/0051—Diffusing sheet or layer
-
- 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
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
- G02F1/133601—Illuminating devices for spatial active dimming
Abstract
Description
본 발명은 액정표시소자용 백라이트 유니트에 관한 것으로, 보다 상세하게는 백 라이트 유니트의 램프 홀더의 구조를 변경하여 램프 근방의 도광판의 휘도 흑화현상을 방지하고 반사광의 효율을 증가시킬 수 있는 액정표시소자용 백라이트 유니트에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit for a liquid crystal display device, and more particularly to a liquid crystal display device capable of changing the structure of the lamp holder of the backlight unit to prevent blackening of the brightness of the light guide plate near the lamp and to increase the efficiency of reflected light. It relates to a backlight unit.
액정표시소자는 박형화, 경량화, 저소비 전력, 구동회로와의 정합성등의 이유로 그 사용범위가 확대되어 가고 있다. 일반적으로 사용되고 있는 투광형 액정표시소자는 자체발광을 하지 못하므로 백라이트가 필요하며, 액정표시소자의 성능은 그 자체 뿐만아니라 사용하는 백라이트 유니트의 성능에 의존하는 바가 크다.BACKGROUND OF THE INVENTION Liquid crystal display devices are expanding in their use range due to thinness, light weight, low power consumption, and compatibility with driving circuits. Generally, a transmissive liquid crystal display device does not emit light by itself and thus requires a backlight, and the performance of the liquid crystal display device depends not only on its own but also on the performance of the backlight unit used.
도 1은 종래의 백라이트 유니트를 도시한 단면도이다.1 is a cross-sectional view showing a conventional backlight unit.
종래의 백라이트 유니트는, 도 1에 도시된 바와 같이, 광원(100)과, 상기 광원(100)을 둘러싸고 있는 램프 반사체(110)와, 인쇄 패턴(120)이 형성되어 있는 도광판(130)과, 상기 도광판(130)의 하면과 상면에 각각 형성된 반사판(140)및 확산판(150)과, 빛을 집광하여 출력하는 프리즘 필름(160)과, 보호막(170)등으로 구성된다. 이때, 상기 프리즘 필름(160)은 하부 프리즘 필름(161) 및 상부 프리즘 필름(162)으로 구성되어 있다.As shown in FIG. 1, the conventional backlight unit includes a light source 100, a lamp reflector 110 surrounding the light source 100, a light guide plate 130 on which a printing pattern 120 is formed, The reflective plate 140 and the diffusion plate 150 formed on the lower surface and the upper surface of the light guide plate 130, the prism film 160 for collecting and outputting light, the protective film 170, and the like. In this case, the prism film 160 includes a lower prism film 161 and an upper prism film 162.
이와 같이 구성된 백라이트 유니트는, 광원(100)로부터 발생되어진 빛이 램프 반사체(110)에 의해 반사되고, 도광판(130)과 확산판(150)을 통해 액정패널(미도시)로 입사되어 소정의 화상이 형성되도록 하는 바, 이때 광원(100)에서 나온 빛은 반사판(140)에 의해 외부로의 누출이 방지된 채 도광판(130)으로 입사되어 고르게 산란된다. 이와 같이 산란된 빛은 확산판(150)에 의해 더욱 균일화된 후, 프리즘 필름(160)을 통과하면서 일정각으로 진행 경로가 전환된 후, 편광판(미도시)으로 수직하게 입사되어 어느 한 방향의 선편광이 된다.In the backlight unit configured as described above, light generated from the light source 100 is reflected by the lamp reflector 110, and is incident on the liquid crystal panel (not shown) through the light guide plate 130 and the diffuser plate 150 to provide a predetermined image. In this case, the light emitted from the light source 100 is incident to the light guide plate 130 while being prevented from leaking to the outside by the reflection plate 140 and is evenly scattered. The light scattered as described above is further uniformed by the diffusion plate 150, and then the traveling path is switched at a predetermined angle while passing through the prism film 160, and then the light is vertically incident on the polarizing plate (not shown). Linear polarization.
여기서, 광원에서 방사되는 광분포를 램프길이와 연관하여 보면, 램프 양단의 전극부근에서 방사가 거의 일어나지 않다가 램프 전극부근을 얼마정도 벗어나 램프 중앙부로 가면서 방사는 거의 100 퍼센트를 유지한다. 이때, 램프 방사가 전극부근에서 급격히 증가하여 전극부근은 상대적으로 어둡게 보인다.Here, when the light distribution emitted from the light source is related to the lamp length, radiation hardly occurs near the electrodes at both ends of the lamp, and the radiation is maintained at about 100 percent while leaving the lamp electrode near the center to some extent. At this time, the lamp radiation is rapidly increased in the vicinity of the electrode so that the vicinity of the electrode appears relatively dark.
또한, 도 2에 도시된 바와 같이, 램프 홀더(200)에 지지되는 램프(210)에 있어서, 램프 전극부근에 수은등의 램프관내 가스가 관 내벽에 도포된 형광체에 흡착되므로써 검게 보이는 흑화현상이 발생한다. 이러한 흑화현상은 일반적으로 램프 양단인 전극부근에서 현저하게 발생하는데 이로 인하여 흑화부위(220)에는 빛이 방사되지 않으며 램프 반사체나 도광판 등의 램프 외부에서 램프관 내벽으로 입사하는 광선이 관내벽의 형광체에서 반사되지 못하고 흡수된다.In addition, as shown in FIG. 2, in the lamp 210 supported by the lamp holder 200, a blackening phenomenon appears as black gas is absorbed by a fluorescent material coated on the inner wall of a tube of mercury lamp near the lamp electrode. do. This blackening phenomenon is generally generated in the vicinity of the electrode of the lamp, the light is not emitted to the blackening area 220, and the light incident on the inner wall of the lamp tube from the outside of the lamp, such as lamp reflector or light guide plate, the phosphor of the inner wall of the tube Is not reflected at and absorbed.
따라서, 램프 양단에서의 휘도가 램프 중앙부의 그것보다 상대적으로 감소되고, 도 2에 도시된 바와 같이, 액정표시소자의 디스플레이 화면(230)의 좌우하부 모서리 부분에서 암부(240) 발생의 요인이 되는 문제점이 있다.Therefore, the luminance at both ends of the lamp is relatively lower than that of the center of the lamp, and as shown in FIG. 2, the cause of the dark portion 240 is generated at the lower left and right corners of the display screen 230 of the liquid crystal display device. There is a problem.
이에 본 발명에 따른 액정표시소자용 백라이트 유니트는 종래 기술의 문제점을 해결하고자 안출된 것으로, 본 발명의 목적은 백 라이트 유니트의 램프 홀더의 구조를 변경하여 램프 근방의 도광판의 휘도 흑화현상을 방지하고 반사광의 효율을증가시킬 수 있는 액정표시소자용 백라이트 유니트를 제공함에 있다.Accordingly, the backlight unit for a liquid crystal display device according to the present invention is devised to solve the problems of the prior art, and an object of the present invention is to change the structure of the lamp holder of the backlight unit to prevent blackening of the brightness of the light guide plate near the lamp. A backlight unit for a liquid crystal display device capable of increasing the efficiency of reflected light is provided.
도 1은 종래의 액정표시소자용 백라이트 유니트를 도시한 단면도.1 is a cross-sectional view showing a conventional backlight unit for a liquid crystal display device.
도 2는 종래의 액정표시소자용 백라이트 유니트를 사용한 디스플레이 화면을 도시한 평면도.Figure 2 is a plan view showing a display screen using a conventional backlight unit for a liquid crystal display device.
도 3은 본 발명에 따른 액정표시소자용 백라이트 유니트를 도시한 단면도.3 is a cross-sectional view showing a backlight unit for a liquid crystal display device according to the present invention;
도 4는 본 발명에 따른 액정표시소자용 백라이트 유니트를 사용한 디스플레이 화면을 도시한 평면도.Figure 4 is a plan view showing a display screen using a backlight unit for a liquid crystal display device according to the present invention.
<도면의 주요부분에 대한 부호의 설명>.<Description of the symbols for the main parts of the drawing>.
300; 광원305; 램프 홀더300; Light source 305; Lamp holder
310; 램프 반사체320; 인쇄 패턴310; Lamp reflector 320; Printed pattern
330; 도광판331; 입광면330; Light guide plate 331; Incident surface
340; 반사판350; 확산판340; Reflector 350; Diffuser
360; 프리즘 필름361; 하부 프리즘 필름360; Prism film 361; Lower prism film
362; 상부 프리즘 필름370; 보호판362; Upper prism film 370; Shroud
상기 본 발명의 목적을 달성하기 위한 본 발명에 따른 액정표시소자용 백라이트 유니트은, 광원과; 상기 광원을 둘러싸고 있는 램프 반사체와, 상기 광원에서 발생되는 빛을 이동시키는 도광판과; 상기 도광판의 하면에 형성되어 빛을 반사하는 반사판과, 상기 도광판의 상면에 형성되어 난반사된 빛을 확산시키는 확산판과; 상기 확산판을 통해 확산되는 빛을 집광하여 출력하는 프리즘 필름을 포함하여 구성되는 액정표시소자용 백라이트 유니트에 있어서, 상기 광원은 램프의 양단에 배치되며, 상기 광원을 포함하는 램프 양단은 상기 램프를 지지하는 램프 홀더로 덮여 있으며, 상기 램프 홀더는 적어도 흑화현상을 발생하는 부분을 덮을 수 있는 길이를 갖는 것을 특징으로 한다.A backlight unit for a liquid crystal display device according to the present invention for achieving the object of the present invention, the light source; A lamp reflector surrounding the light source, and a light guide plate for moving light generated from the light source; A reflector formed on a lower surface of the light guide plate to reflect light, and a diffuser plate formed on an upper surface of the light guide plate to diffuse diffusely reflected light; A backlight unit for a liquid crystal display device comprising a prism film for collecting and outputting light diffused through the diffusion plate, wherein the light source is disposed at both ends of a lamp, and both ends of the lamp including the light source are connected to the lamp. It is covered with a supporting lamp holder, the lamp holder is characterized in that it has a length that can cover at least a portion that generates a blackening phenomenon.
이하, 본 발명에 따른 액정표시소자용 백라이트 유니트를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, a backlight unit for a liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명에 따른 액정표시소자용 백라이트 유니트를 도시한 단면도이다.3 is a cross-sectional view illustrating a backlight unit for a liquid crystal display device according to the present invention.
본 발명에 따른 액정표시소자용 백라이트 유니트 구조는, 도 3에 도시된 바와 같이, 고전압의 펄스를 발생시키는 구동부(미도시)의 출력단에 연결되어 인가되는 펄스에 따라 방전하여 광을 발생시키는 광원(300)과, 상기 광원(300)을 둘러싸고 있는 램프 반사체(330)와, 상기 광원(300)에서 발생되는 빛을 이동시키고 빛을 난반사시키는 인쇄 패턴(320)이 형성되어 있는 도광판(330)과, 상기 도광판(330)의하면에 형성되어 빛을 반사하는 반사판(340)과, 상기 도광판(330)의 상면에 형성되어 난반사된 빛을 확산시키는 확산판(350)과, 상기 확산판(350)을 통해 확산되는 빛을 집광하여 출력하는 프리즘 필름(360)과, 상기 프리즘 필름(360)을 외부의 충격으로부터 보호하는 보호막(370)으로 구성된다. 여기서, 상기 프리즘 필름(360)은 하부 프리즘 필름(363) 및 상부 프리즘 필름(362)으로 구성되어 있으며, 상기 보호막(370)은 본 발명의 필수 구성 요소인 것은 아니다.As shown in FIG. 3, a backlight unit structure for a liquid crystal display device according to the present invention includes a light source connected to an output terminal of a driving unit (not shown) for generating a pulse of high voltage and generating light by discharging according to an applied pulse. 300, a light guide plate 330 formed with a lamp reflector 330 surrounding the light source 300, a printing pattern 320 for moving the light generated by the light source 300 and diffusely reflecting the light; Reflector plate 340 formed on the lower surface of the light guide plate 330 to reflect light, diffuser plate 350 formed on the upper surface of the light guide plate 330 to diffuse diffusely reflected light, and through the diffusion plate 350 The prism film 360 collects and outputs the diffused light, and the protective film 370 protects the prism film 360 from external impact. Here, the prism film 360 is composed of a lower prism film 363 and the upper prism film 362, the protective film 370 is not an essential component of the present invention.
또한, 상기 광원(300)은 램프의 양단에 배치되며, 상기 광원(300)을 포함하는 램프 양단은 상기 램프를 지지하는 램프 홀더(305)로 덮여 있으며, 상기 램프 홀더(305)는 적어도 흑화현상을 발생하는 부분을 덮을 수 있는 길이를 갖는다.In addition, the light source 300 is disposed at both ends of the lamp, both ends of the lamp including the light source 300 is covered with a lamp holder 305 for supporting the lamp, the lamp holder 305 is at least blackening phenomenon It has a length to cover the portion that generates.
여기서, 상기 램프 홀더(305)는 상기 도광판(330)의 입광면(331)에 평행한 평면형태이다.Here, the lamp holder 305 has a planar shape parallel to the light incident surface 331 of the light guide plate 330.
한편, 상기 액정표시소자용 백라이트 유니트의 동작을 설명하면 다음과 같다.On the other hand, the operation of the backlight unit for the liquid crystal display device will be described.
먼저, 광원(300)인 냉음극관 램프(CCFL)에서 실린더형으로 방사되어 나간 빛이 상기 램프 반사체(330)에서 반사되어 도광판(330)으로 굴절되어 투과된다. 투과된 빛은 상기 도광판(330) 내부에서 전반사를 형성하면서 도광판(330)을 벗어나지 못하는데 도광판(330)하면상에 형성된 인쇄 패턴(320)에 의하여 빛은 반사, 굴절 또는 산란되어 빛의 진행이 변경되어 도광판(330)으로부터 벗어난다. 이때, 상기 도광판(330) 하면에 형성된 반사판(340)에 의하여 빛이 액정표시소자의 패널로만 향하게 한다.First, the light emitted from the cold cathode tube lamp CCFL, which is the light source 300 in a cylindrical shape, is reflected by the lamp reflector 330 and refracted by the light guide plate 330 to be transmitted. The transmitted light does not escape the light guide plate 330 while forming total reflection inside the light guide plate 330, but the light is reflected, refracted, or scattered by the printing pattern 320 formed on the bottom surface of the light guide plate 330, thereby changing the progress of light. To be out of the light guide plate 330. In this case, light is directed only to the panel of the liquid crystal display by the reflective plate 340 formed on the lower surface of the light guide plate 330.
한편, 상기 램프 홀더(305)는 흑화된 램프 양단의 전극부위를 덮고 있으며, 또한 그 형상은 램프의 형상인 원통형이 아니라 램프 양단에 있는 램프 반사체(310)를 전부 덮을 수 있는 구조를 가진다. 상기와 같은 구조를 가지므로써 램프 외부로부터 흑화부근의 램프 및 램프 반사체(310)로 입사하는 빛을 차단하고, 이와 동시에 램프 반사체(310) 내부로 입사하기 전 램프 반사체(310)에서 전반사되어 도광판(330)으로 반사하기 위함이다.Meanwhile, the lamp holder 305 covers the electrode portions at both ends of the blackened lamp, and the shape of the lamp holder 305 may cover the lamp reflector 310 at both ends of the lamp, not the cylindrical shape of the lamp. By having the above structure, the light incident to the lamp and the lamp reflector 310 near the blackening is blocked from the outside of the lamp, and at the same time, it is totally reflected by the lamp reflector 310 before being incident into the lamp reflector 310 and the light guide plate ( 330).
여기서, 상기 램프 홀더(305)의 표면에 고반사처리를 하여 반사율을 증가시켜 광효율을 배가시킬 수 있다.In this case, the high reflectivity of the surface of the lamp holder 305 may be increased to increase the reflectance to double the light efficiency.
상기와 같이, 적어도 흑화발생부위까지 덮을 수 있는 램프 홀더가 배치된 램프를 사용했을 때, 액정표시소자의 디스플레이 화면에 미치는 영향을 살펴보면 다음과 같다.As described above, when the lamp having a lamp holder disposed to cover at least the blackening occurs is used, the effect on the display screen of the liquid crystal display device is as follows.
도 4에 도시된 바와 같이, 본 발명에 따른 램프 홀더(405)를 구비한 램프(410)가 배치된 액정표시소자의 디스플레이 화면(430)에 있어서는 상기 화면(430)의 좌우하부 모서리 부분(440)에 종래와 같은 암부가 발생되지 않는다.As shown in FIG. 4, in the display screen 430 of the liquid crystal display device in which the lamp 410 having the lamp holder 405 according to the present invention is disposed, the left and right lower corners 440 of the screen 430 are disposed. ), No dark portion as in the prior art is generated.
이는 흑화현상이 발생하는 부위를 램프 홀더가 덮음으로해서 상대적으로 휘도가 떨어지는 램프 양단의 어두운 부위를 제거했기 때문이며, 상기 램프 홀더의 표면에 고반사처리를 하므로써 반사율을 증가시켰기 때문이다.This is because the lamp holder covers the area where the blackening phenomenon occurs, thereby removing the dark areas at both ends of the lamp which are relatively low in brightness, and the reflectance is increased by the high reflection treatment on the surface of the lamp holder.
이상에서 살펴본 바와 같이, 본 발명에 따른 액정표시소자용 백라이트 유니트는 다음과 같은 효과가 있다.As described above, the liquid crystal display backlight unit according to the present invention has the following effects.
본 발명은 백 라이트 유니트의 램프 홀더를 흑화현상이 발생하는 부분까지 덮을 수 있도록 그 구조를 변경하고, 또한 램프 반사체를 전부 덮을 수 있으며 이와 동시에 도광판의 입광면에 평행하도록 덮을 수 있는 구조로 한 것이다.The present invention is to change the structure of the lamp holder of the backlight unit to cover the blackening phenomenon, and also to cover all the lamp reflector, and at the same time to cover the lamp holder parallel to the light incident surface of the light guide plate .
따라서, 광의 흡수구조를 개선하고 고반사율을 가능케 하여 램프 근방의 도광판의 휘도 흑화현상을 방지하고 반사광의 효율을 증가시켜 고품위의 화면특성을 갖는 액정표시소자를 실현할 수 있다.Therefore, it is possible to realize a liquid crystal display device having high quality screen characteristics by improving light absorption structure and enabling high reflectance to prevent blackening of the brightness of the light guide plate near the lamp and to increase the efficiency of the reflected light.
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| CN100440005C (en) * | 2003-07-30 | 2008-12-03 | 株式会社日立显示器 | Liquid crystal display device |
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| JP2910728B2 (en) * | 1997-05-20 | 1999-06-23 | 日本電気株式会社 | Backlight device |
| JP3648030B2 (en) * | 1997-11-05 | 2005-05-18 | 株式会社日立製作所 | Liquid crystal display |
| JP3803191B2 (en) * | 1998-03-13 | 2006-08-02 | スタンレー電気株式会社 | Lighting device |
| KR100490327B1 (en) * | 1998-07-29 | 2005-08-01 | 삼성전자주식회사 | Backlight assembly |
| KR100512092B1 (en) * | 1998-08-26 | 2005-11-01 | 삼성전자주식회사 | LCD module |
| KR100284569B1 (en) * | 1998-09-28 | 2001-03-15 | 최태현 | Light guide plate manufacturing process of backlighting unit |
| KR100628433B1 (en) * | 1999-06-08 | 2006-09-27 | 삼성전자주식회사 | Back light unit for liquid crystal display device |
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