KR20060129626A - Backlight unit for direct type liquid crystal display device - Google Patents

Backlight unit for direct type liquid crystal display device Download PDF

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Publication number
KR20060129626A
KR20060129626A KR1020050050199A KR20050050199A KR20060129626A KR 20060129626 A KR20060129626 A KR 20060129626A KR 1020050050199 A KR1020050050199 A KR 1020050050199A KR 20050050199 A KR20050050199 A KR 20050050199A KR 20060129626 A KR20060129626 A KR 20060129626A
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South Korea
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liquid crystal
plate
crystal display
backlight unit
fluorescent lamp
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KR1020050050199A
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Korean (ko)
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정원호
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엘지.필립스 엘시디 주식회사
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Priority to KR1020050050199A priority Critical patent/KR20060129626A/en
Publication of KR20060129626A publication Critical patent/KR20060129626A/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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • 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
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

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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)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

A backlight unit for a direct type of LCD is provided to increase the diffusive area of the light applied to a diffusing plate, thereby enhancing the diffusive efficiency of light, by forming semi-circle shaped grooves on a lower surface of the diffusing plate. A reflecting plate(121) is placed on a cover bottom(127). A plurality of fluorescent lamps(123) is parallel with each other above the reflecting plate. A diffusing plate(129) and a plurality of optical sheets(119) are placed above the fluorescent lamps, wherein the diffusing plate has semi-circle shaped grooves on the lower surface thereof. A support main(117) edges the diffusive plate. An LCD panel(113) is placed above the optical sheets. A top cover(111) edges the LCD panel, wherein the top cover is coupled with the support main and the cover bottom.

Description

직하형 액정표시장치용 백라이트 유닛{Backlight unit for direct type liquid crystal display device} Backlight unit for direct type liquid crystal display device

도 1은 일반적인 직하형 액정표시장치모듈을 개략적으로 도시한 도면. 1 is a schematic view showing a general direct type liquid crystal display module.

도 2는 도 1의 직하형 액정표시장치모듈의 단면도.FIG. 2 is a cross-sectional view of the direct type liquid crystal display module of FIG. 1. FIG.

도 3은 본 발명의 실시예에 따른 직하형 액정표시장치모듈의 구조를 개략적으로 도시한 도면.3 is a view schematically showing the structure of a direct type liquid crystal display module according to an embodiment of the present invention.

도 4는 도 3의 직하형 액정표시장치모듈의 단면도.4 is a cross-sectional view of the direct type liquid crystal display module of FIG.

도 5는 본 발명의 다른 실시예를 개략적으로 도시한 도면. 5 schematically illustrates another embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

111 : 탑커버 113 : 액정패널111: top cover 113: liquid crystal panel

115 : 인쇄회로기판 117 : 서포트메인115: printed circuit board 117: support main

119 : 광학시트 120 : 백라이트 유닛119: optical sheet 120: backlight unit

121 : 반사판 123 : 형광램프121: reflector 123: fluorescent lamp

125 : 램프가이드 127 : 커버버툼 125: Lamp Guide 127: Cover Bottom

129 : 확산판129 diffuser plate

본 발명은 직하형 액정표시장치에 관한 것으로, 특히 액정표시장치의 백라이트 유닛에 관한 것이다. The present invention relates to a direct type liquid crystal display device, and more particularly, to a backlight unit of a liquid crystal display device.

일반적인 액정표시장치의 화상구현원리는 액정의 광학적 이방성과 분극성질을 이용하는 것으로, 액정은 분자구조가 가늘고 길며 배열에 방향성을 갖는 이방성과 전기장 내에 놓일 경우 그 크기에 따라 분자배열의 방향이 변화되는 분극성질을 띤다. 이에 액정표시장치는 액정층을 사이에 두고 서로 마주보는 면으로 각각 전계생성전극이 형성된 한 쌍의 투명절연기판으로 이루어진 액정패널을 필수적인 구성요소로 하며, 각 전계생성전극 사이의 전기장 변화를 통해서 액정분자의 배열방향을 인위적으로 조절하고 이때 변화되는 빛의 투과율을 이용하여 여러 가지 화상을 표시한다. The image realization principle of a general liquid crystal display device uses the optical anisotropy and polarization property of the liquid crystal. The liquid crystal has a thin and long molecular structure and polarization in which the direction of the molecular array changes according to its size when placed in an electric field and an anisotropy having an orientation in the array. It has a nature. The liquid crystal display is an essential component of a liquid crystal panel composed of a pair of transparent insulating substrates, each having a liquid crystal layer interposed therebetween, and having a field generating electrode formed therebetween. Various images are displayed by artificially adjusting the arrangement direction of the molecules and using the light transmittance which is changed at this time.

상기 액정패널은 자체 발광요소를 갖지 못하는 소자이므로 별도의 광원을 요구하게 된다. 이에 따라, 배면으로는 형광램프를 구비한 백라이트 유닛(Backlight unit)이 마련되어 액정패널 전면을 향해 빛을 조사하고 이를 통해서 비로소 식별 가능한 휘도의 화상이 구현된다.Since the liquid crystal panel does not have a light emitting element, it requires a separate light source. As a result, a backlight unit having a fluorescent lamp is provided on the rear surface to irradiate light toward the front of the liquid crystal panel, thereby realizing an image of identifiable luminance.

상기 백라이트 유닛은 그 조명 방식에 따라, 에지형(Edge type)과 직하형(Direct type)으로 구분된다. The backlight unit is classified into an edge type and a direct type according to its illumination method.

상기 에지형은 하나 또는 한쌍의 램프가 도광판의 일측부와 두개 또는 두쌍 의 램프가 도광판의 양측부 각각에 배치된 구조를 가지며, 상기 직하형은 수개의 램프가 도광판의 하부에 배치된 구조로, 상기 에지형은 제작이 용이한 이점을 갖는 반면, 상기 직하형은 빛의 균일도가 높은 것과 관련하여 대형 액정표시장치에 상대적으로 유리한 이점을 갖는다. The edge type has a structure in which one or a pair of lamps are disposed on one side of the light guide plate and two or two pairs of lamps on each side of the light guide plate, and the direct type is a structure in which several lamps are disposed below the light guide plate. The edge type has the advantage of being easy to manufacture, while the direct type has a relatively advantageous advantage over a large liquid crystal display in terms of high uniformity of light.

도 1은 일반적인 직하형 액정표시장치모듈을 개략적으로 도시한 도면이다. 1 is a view schematically illustrating a general direct type liquid crystal display module.

도시한 바와 같이, 일반적인 액정표시장치모듈은 액정패널(13)과 백라이트 유닛(20), 그리고 서포트메인(17)과 커버버툼(27), 탑커버(11)로 구성된다. As illustrated, a general liquid crystal display module includes a liquid crystal panel 13, a backlight unit 20, a support main 17, a cover bottom 27, and a top cover 11.

상기 백라이트 유닛(20)은 반사판(21)과, 이의 상부면에 다수의 형광램프(23)가 나란하게 배열되며, 이들 형광램프(23) 상부에는 확산판(29)과, 다수의 광학시트(19)를 포함한다. 그리고 이때 다수의 형광램프(23)는 커버버툼(27)과 체결되는 한 쌍의 램프가이드(25)에 의해 고정되며, 확산판(29)은 이의 가장자리를 테두리하여 커버버툼(27)으로 결합되는 서포트메인(17)에 의해 고정된다.The backlight unit 20 includes a reflecting plate 21 and a plurality of fluorescent lamps 23 arranged side by side on the upper surface thereof, a diffusion plate 29 and a plurality of optical sheets on the fluorescent lamp 23. 19). In this case, the plurality of fluorescent lamps 23 are fixed by a pair of lamp guides 25 fastened to the cover bottom 27, and the diffusion plate 29 is coupled to the cover bottom 27 by bordering its edges. It is fixed by the support main 17.

또한, 백라이트 유닛(20) 전방으로는 액정패널(13)이 포개어지며, 이의 가장자리를 테두리하며 커버버툼(27)에 결합되는 탑커버(11)에 의해 백라이트 유닛(20) 및 액정패널(13)이 일체로 고정된다.In addition, the liquid crystal panel 13 is stacked in front of the backlight unit 20, and the backlight unit 20 and the liquid crystal panel 13 are surrounded by the top cover 11 that is bound to the edge of the backlight unit 20 and is coupled to the cover bottom 27. This is fixed integrally.

이때, 상기 액정패널(13)의 일측에는 연성회로기판을 매개로 연결된 인쇄회로기판(15)이 구성된다. At this time, one side of the liquid crystal panel 13 is a printed circuit board 15 is connected via a flexible circuit board.

도 2는 도 1의 직하형 액정표시장치모듈의 단면도이다. FIG. 2 is a cross-sectional view of the direct type liquid crystal display module of FIG. 1.

도시한 바와 같이, 커버버툼(27), 그리고 이의 상면에 개재된 반사판(21)과, 이의 상부에 다수가 나란하게 배열된 형광램프(23) 및 이를 지지하는 램프가이드(25)와, 상기 다수의 형광램프 상부에 안착되는 확산판(29)과, 다수의 광학시트(19)를 확인할 수 있다.As shown, the cover bottom 27, and the reflecting plate 21 interposed on the upper surface thereof, the fluorescent lamp 23 arranged in parallel with a plurality on the upper portion thereof, the lamp guide 25 for supporting the same, and the plurality of The diffusion plate 29 and the plurality of optical sheets 19 seated on the fluorescent lamp of the can be confirmed.

이때, 도시하지는 않았지만, 상기 확산판(29) 및 다수의 광학시트(19)는 서포트메인에 의해 고정된다. At this time, although not shown, the diffusion plate 29 and the plurality of optical sheets 19 are fixed by the support main.

상기 확산판(29)은 다수의 형광램프(23)에서 발산된 빛을 액정패널 쪽으로 진행하도록 하고, 넓은 범위의 각도에서 입사할 수 있도록 빛을 확산시키는 역할을 한다. The diffusion plate 29 propagates the light emitted from the plurality of fluorescent lamps 23 toward the liquid crystal panel, and diffuses the light to be incident at a wide range of angles.

때문에, 상기 형광램프(23)와 확산판(29)은 일정한 거리를 두어, 형광램프(23)에서 발산되는 빛이 확산판(29) 전체에 걸쳐 균일하게 입사되도록 해야 한다. Therefore, the fluorescent lamp 23 and the diffusion plate 29 should be spaced a certain distance so that the light emitted from the fluorescent lamp 23 is uniformly incident over the entire diffusion plate (29).

그러나, 액정표시장치의 슬림화에 의해 형광램프(23)와 확산판(29)과의 거리가 짧게 형성되는 경우, 형광램프(23)에서 발산되는 빛이 짧은 거리를 진행하기 때문에 확산판(29)에 입사되는 영역이 상대적으로 작게 된다. 때문에, 확산판(29) 내에는 빛이 입사되지 않는 영역이 발생되며, 액정패널(도 1의 13) 상에도 빛이 도달하지 않는 영역이 발생되게 된다. However, when the distance between the fluorescent lamp 23 and the diffuser plate 29 is shortened by slimming the liquid crystal display device, since the light emitted from the fluorescent lamp 23 travels a short distance, the diffuser plate 29 is used. The area incident on the surface becomes relatively small. Therefore, a region where light is not incident is generated in the diffusion plate 29, and a region where light does not reach the liquid crystal panel (13 in FIG. 1) is generated.

이로 인하여, 액정패널(도 1의 13) 상에는 빛이 도달한 영역과 도달하지 않은 영역 사이에서 휘도차가 발생되어 화면상에는 형광램프(23)와 유사한 형상의 얼룩이 표시되게 되는 문제점이 있다. As a result, a luminance difference is generated between a region where light arrives and a region that does not reach the liquid crystal panel (13 in FIG. 1), thereby causing a problem that a spot similar to that of the fluorescent lamp 23 is displayed on the screen.

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 액정표시장치를 슬림화로 구성하는 경우에도 빛의 확산효율을 증대시킴으로써 액정표시장치의 휘도를 균일하게 하는 것을 목적으로 한다. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make the luminance of the liquid crystal display device uniform by increasing the light diffusion efficiency even when the liquid crystal display device is made slim.

전술한 바와 같은 목적을 달성하기 위해, 본 발명은 커버버툼과; 상기 커버버툼 상에 안착되는 반사판과; 상기 반사판 상부에 나란하게 구성되는 다수의 형광램프와, 상기 형광램프를 가이드 하기 위해 구비된 램프가이드와; 상기 형광램프 상에 안착되며, 하부면에 반원형의 홈이 구성되어 있는 확산판과, 그리고 다수의 광학시트와; 상기 확산판의 가장자리를 테두리 하는 서포트메인과; 상기 광학시트 상부에 안착되며, 인쇄회로기판을 구비한 액정패널과; 상기 액정패널의 가장자리를 테두리하며, 상기 서포트메인 및 커버버툼에 조립 체결되는 탑커버를 포함하는 액정표시장치 백라이트 유닛을 제공한다.In order to achieve the object as described above, the present invention is covered covertum; A reflection plate seated on the cover bottom; A plurality of fluorescent lamps arranged side by side on the reflecting plate, and a lamp guide provided to guide the fluorescent lamps; A diffusion plate mounted on the fluorescent lamp and having a semicircular groove formed on a lower surface thereof, and a plurality of optical sheets; A support main bordering an edge of the diffusion plate; A liquid crystal panel mounted on the optical sheet and having a printed circuit board; A liquid crystal display backlight unit is provided, which includes an edge of the liquid crystal panel and a top cover assembled to the support main and the cover bottom.

상기 확산판의 하부면에 구성되는 반원형의 홈은 상기 다수의 형광램프와 각각 대응되는 영역에 상기 형광램프의 길이방향을 따라 구성되는 것을 특징으로 하며, 상기 확산판 하부면에 구성되는 반원형의 홈은 확산판 두께의

Figure 112005030956608-PAT00001
정도의 두께로 형성하는 것을 특징으로 한다. The semicircular grooves formed on the lower surface of the diffuser plate are formed along the longitudinal direction of the fluorescent lamps in regions corresponding to the plurality of fluorescent lamps, respectively. Silver diffuser plate thickness
Figure 112005030956608-PAT00001
Characterized in that formed to a thickness of about.

또한, 상기 확산판의 하부면에 구성된 반원형의 홈은 브이(V)형 홈, 다각형 홈 등 다양한 형상으로 구성할 수 있는 것을 특징으로 한다. In addition, the semi-circular groove formed on the lower surface of the diffusion plate is characterized in that it can be configured in a variety of shapes, such as V (V) groove, polygonal groove.

이하, 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

도 3은 본 발명의 실시예에 따른 직하형 액정표시장치모듈의 구조를 개략적으로 도시한 도면이다. 3 is a diagram schematically illustrating a structure of a direct type liquid crystal display module according to an exemplary embodiment of the present invention.

도시한 바와 같이, 액정표시장치모듈은 액정패널(113)과 백라이트 유닛(120), 그리고 서포트메인(117)과 커버버툼(127), 탑커버(111)로 구성된다. As illustrated, the liquid crystal display module includes a liquid crystal panel 113, a backlight unit 120, a support main 117, a cover bottom 127, and a top cover 111.

상기 백라이트 유닛(120)은 반사판(121)과, 이의 상부면에 다수의 형광램프(123)가 나란하게 배열되며, 이들 형광램프(123) 상부에는 확산판(129)과, 다수의 광학시트(119)가 안착된다. 그리고 이때 다수의 형광램프(123)는 커버버툼(127)과 체결되는 한 쌍의 램프가이드(125)에 의해 고정되며, 확산판(129)은 이의 가장자리를 테두리하여 커버버툼(127)으로 결합되는 서포트메인(117)에 의해 고정된다.The backlight unit 120 includes a reflector plate 121 and a plurality of fluorescent lamps 123 arranged side by side on the upper surface thereof, and a diffusion plate 129 and a plurality of optical sheets on the fluorescent lamp 123. 119 is seated. In this case, the plurality of fluorescent lamps 123 are fixed by a pair of lamp guides 125 fastened to the cover bottom 127, and the diffusion plate 129 is coupled to the cover bottom 127 by bordering the edge thereof. It is fixed by the support main 117.

이때, 상기 확산판(129) 하부면에는 각각의 형광램프(123)와 대응되는 위치에 형광램프(123)의 길이방향을 따라 반원형의 홈이 구성되어 있는 것을 특징으로 한다. At this time, the lower surface of the diffuser plate 129 is characterized in that the semi-circular groove is formed along the longitudinal direction of the fluorescent lamp 123 at a position corresponding to each fluorescent lamp 123.

또한, 백라이트 유닛(120) 전방으로는 액정패널(113)을 차례로 안착하며, 이의 가장자리를 테두리하며 커버버툼(127)에 결합되는 탑커버(111)에 의해 백라이트 유닛(120) 및 액정패널(113)을 일체로 고정한다.In addition, the backlight unit 120 in front of the liquid crystal panel 113 is seated in sequence, the edge of the back cover unit 127 and the backlight unit 120 and the liquid crystal panel 113 by the top cover 111 is coupled to the cover bottom 127. ) Fixed together.

이때, 상기 액정패널(113)의 일측에는 연성회로기판을 매개로 연결된 인쇄회로기판(115)이 구성된다. At this time, one side of the liquid crystal panel 113 is a printed circuit board 115 connected via a flexible circuit board.

상기 커버버툼(127)은 반사판(121)과 다수의 형광램프(123)를 수납하여 백라이트 유닛(120) 전체를 지탱하는 역할을 하고, 반사판(121)은 반사율이 큰 백색 또는 은색의 금속시트로 이루어져 형광램프(123)로부터 발생된 빛을 전방으로 반사시키게 된다. The cover bottom 127 stores the reflector 121 and the plurality of fluorescent lamps 123 to support the entire backlight unit 120, and the reflector 121 is a white or silver metal sheet having a high reflectance. It is made to reflect the light generated from the fluorescent lamp 123 to the front.

그리고 확산판(129)은 형광램프(123)에서 발생된 빛을 산란시켜 이의 전방으로 포개어지는 액정패널(113)로 고르게 입사시켜, 이를 통해 시야각이 확대되는 효과를 얻을 수 있다. In addition, the diffusion plate 129 scatters the light generated from the fluorescent lamp 123 and uniformly enters the liquid crystal panel 113 superimposed thereon, thereby increasing the viewing angle.

따라서, 백라이트 유닛(120)은 형광램프(123)의 빛을 전방의 액정패널(113)로 고르고 균일하게 공급한다.Therefore, the backlight unit 120 evenly and uniformly supplies the light of the fluorescent lamp 123 to the front liquid crystal panel 113.

도 4는 도 3의 직하형 액정표시장치모듈의 단면도이다. FIG. 4 is a cross-sectional view of the direct type liquid crystal display module of FIG. 3.

도시한 바와 같이, 커버버툼(127), 그리고 이의 상면에 개재된 반사판(121)과, 이의 상부에 다수가 나란하게 배열된 형광램프(123) 및 이를 지지하는 램프가이드(125)와, 다수의 형광램프(23) 상부에 안착되며, 상기 다수의 형광램프(123) 상부에 안착되는 확산판(129)과, 다수의 광학시트(119)를 확인할 수 있다. As shown, the cover bottom 127, and the reflecting plate 121 interposed on the upper surface thereof, the fluorescent lamp 123 is arranged in parallel with a plurality on the upper portion thereof, and the lamp guide 125 for supporting the same, The diffusion plate 129 and the plurality of optical sheets 119 mounted on the fluorescent lamp 23 and seated on the plurality of fluorescent lamps 123 may be confirmed.

이때, 상기 확산판(129)의 하부면에는 각각의 형광램프(123)와 대응되는 위치에 형광램프(123)의 길이방향을 따라 반원형의 홈이 형성되며, 상기 반원형의 홈은 확산판(129) 두께의

Figure 112005030956608-PAT00002
정도의 깊이로 형성한다. In this case, a semicircular groove is formed in a lower surface of the diffuser plate 129 along a longitudinal direction of the fluorescent lamp 123 at a position corresponding to each fluorescent lamp 123, and the semicircular groove is a diffuser plate 129. A) thick
Figure 112005030956608-PAT00002
Form to depth.

또한 도시하지는 않았지만, 상기 확산판(129) 및 다수의 광학시트(119)는 서포트메인에 의해 고정된다.In addition, although not shown, the diffusion plate 129 and the plurality of optical sheets 119 are fixed by the support main.

상기 확산판(129)의 하부면에 형광램프(123)의 길이방향을 따라 반원형의 홈을 구성함으로써, 상기 형광램프(123)에서 발산되는 빛이 확산판(129) 내부로 입사되는 산란면적을 넓히게 되고 이로 인하여, 빛의 산란효율을 높일 수 있는 효과를 볼 수 있다. By forming a semicircular groove along the longitudinal direction of the fluorescent lamp 123 on the lower surface of the diffuser plate 129, the scattering area of the light emitted from the fluorescent lamp 123 is incident into the diffuser plate 129 It is widened by this, it is possible to see the effect of increasing the light scattering efficiency.

이는, 액정표시장치를 슬림하게 구성하는 경우에도 높은 빛의 산란효율에 의해 액정패널(도 3의 113) 내로 균일한 빛을 입사 시킬 수 있게 되어, 형광램프(123)가 비치는 문제점을 해결할 수 있는 효과가 있다. This makes it possible to inject uniform light into the liquid crystal panel (113 of FIG. 3) by the high light scattering efficiency even when the liquid crystal display device is slim, thereby solving the problem that the fluorescent lamp 123 shines. It works.

또한, 액정패널(도 3의 113) 전체적으로 휘도가 균일해 지는 효과가 있다. In addition, there is an effect that the luminance is uniform throughout the liquid crystal panel (113 in FIG. 3).

도 5는 본 발명의 다른 실시예를 도시한 도면으로, 확산판(129) 하부면에 반원형의 홈 외에도 브이(V)형의 홈, 다면형의 홈 등, 다양한 형상으로 구성할 수 있다. 5 is a view showing another embodiment of the present invention, in addition to the semi-circular groove on the lower surface of the diffuser plate 129 may be configured in various shapes, such as a V-shaped groove, a multi-sided groove.

본 발명은 상기 실시예로 한정되지 않고, 본 발명의 취지를 벗어나지 않는 한도내에서 다양하게 변경하여 실시할 수 있다. The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

위에 상술한 바와 같이, 본 발명에 따라 백라이트 유닛의 확산판 하부면에 반원형의 홈을 구성함으로써, 상기 램프에서 발산되는 빛이 확산판 내부로 입사되는 산란면적을 넓힘으로써, 빛의 산란효율을 높일 수 있는 효과가 있다.As described above, by forming a semi-circular groove in the bottom surface of the diffuser plate of the backlight unit according to the present invention, by increasing the scattering area of the light emitted from the lamp into the diffuser plate, the light scattering efficiency It can be effective.

이로 인하여, 액정표시장치의 휘도를 균일하게 하는 효과가 있다. Thus, there is an effect of making the luminance of the liquid crystal display device uniform.

Claims (4)

커버버툼과;Covertum; 상기 커버버툼 상에 안착되는 반사판과; A reflection plate seated on the cover bottom; 상기 반사판 상부에 나란하게 구성되는 다수의 형광램프와, 상기 형광램프를 가이드 하기 위해 구비된 램프가이드와;A plurality of fluorescent lamps arranged side by side on the reflecting plate, and a lamp guide provided to guide the fluorescent lamps; 상기 형광램프 상에 안착되며, 하부면에 반원형의 홈이 구성되어 있는 확산판과, 그리고 다수의 광학시트와;A diffusion plate mounted on the fluorescent lamp and having a semicircular groove formed on a lower surface thereof, and a plurality of optical sheets; 상기 확산판의 가장자리를 테두리 하는 서포트메인과;A support main bordering an edge of the diffusion plate; 상기 광학시트 상부에 안착되며, 인쇄회로기판을 구비한 액정패널과;A liquid crystal panel mounted on the optical sheet and having a printed circuit board; 상기 액정패널의 가장자리를 테두리하며, 상기 서포트메인 및 커버버툼에 조립 체결되는 탑커버The top cover which is bounded by the edge of the liquid crystal panel and assembled to the support main and cover bottom 를 포함하는 액정표시장치 백라이트 유닛.Liquid crystal display device backlight unit comprising a. 제 1 항에 있어서,The method of claim 1, 상기 확산판의 하부면에 구성되는 반원형의 홈은 상기 다수의 형광램프와 각각 대응되는 영역에 상기 형광램프의 길이방향을 따라 구성되는 것을 특징으로 하는 액정표시장치 백라이트 유닛. And a semicircular groove formed on a lower surface of the diffusion plate is formed along a longitudinal direction of the fluorescent lamp in a region corresponding to the plurality of fluorescent lamps, respectively. 제 1 항에 있어서,The method of claim 1, 상기 확산판 하부면에 구성되는 반원형의 홈은 확산판 두께의
Figure 112005030956608-PAT00003
정도의 두께로 형성하는 것을 특징으로 하는 액정표시장치 백라이트 유닛.The semicircular groove formed on the lower surface of the diffuser plate has a diffuser plate thickness.
Figure 112005030956608-PAT00003
A liquid crystal display backlight unit, characterized in that formed to a thickness of about. 제 1 항에 있어서, The method of claim 1, 상기 확산판의 하부면에 구성된 반원형의 홈은 브이(V)형 홈, 다각형 홈 등 다양한 형상으로 구성할 수 있는 것을 특징으로 하는 액정표시장치 백라이트 유닛. The semicircular groove formed on the lower surface of the diffuser plate may be configured in various shapes such as a V-type groove and a polygonal groove.
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Publication number Priority date Publication date Assignee Title
KR101366767B1 (en) * 2007-06-13 2014-02-21 삼성전자주식회사 Image display apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101366767B1 (en) * 2007-06-13 2014-02-21 삼성전자주식회사 Image display apparatus

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