KR100532867B1 - Backlight assembly - Google Patents

Backlight assembly Download PDF

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Publication number
KR100532867B1
KR100532867B1 KR1019980030529A KR19980030529A KR100532867B1 KR 100532867 B1 KR100532867 B1 KR 100532867B1 KR 1019980030529 A KR1019980030529 A KR 1019980030529A KR 19980030529 A KR19980030529 A KR 19980030529A KR 100532867 B1 KR100532867 B1 KR 100532867B1
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KR
South Korea
Prior art keywords
guide plate
light guide
mold frame
protrusion
edges
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KR1019980030529A
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Korean (ko)
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KR20000009876A (en
Inventor
김원주
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삼성전자주식회사
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Priority to KR1019980030529A priority Critical patent/KR100532867B1/en
Publication of KR20000009876A publication Critical patent/KR20000009876A/en
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Publication of KR100532867B1 publication Critical patent/KR100532867B1/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
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

도광판의 서로 대향하는 한쌍의 모서리부분에 돌출부를 형성하고, 돌출부와 대응되는 몰드프레임에 돌출부를 삽입하는 삽입홈을 형성하여 도광판을 끼우면 몰드프레임이 도광판의 가장자리를 잡고 있어 도광판의 열팽창에 의해 도광판의 가장자리가 LCD 패널 쪽으로 휘어지는 것을 방지한다.The protrusions are formed on a pair of opposite edges of the light guide plate, and an insertion groove for inserting the protrusions is formed in the mold frame corresponding to the protrusions to insert the light guide plate. Then, the mold frame is held by the edge of the light guide plate. Prevents edges from bending towards the LCD panel.

따라서, 도광판의 상부에 적재된 광학 시트류들의 가장자리부분이 도광판의 가장자리부분에 눌리지 않기 때문에 움이 발생되는 것을 방지할 수 있어 액정표시장치의 화질을 향상시킬 수 있다.Therefore, since the edges of the optical sheets stacked on the light guide plate are not pressed against the edges of the light guide plate, it is possible to prevent the occurrence of erosion, thereby improving the image quality of the liquid crystal display device.

Description

백라이트 어셈블리Backlight assembly

본 발명은 백라이트 어셈블리에 관한 것으로, 더욱 상세하게는 서로 대향되는 도광판의 모서리부분을 소정길이 돌출시켜 도광판의 휨으로 인해 광학시트류들에 움이 발생되는 것을 방지한 백라이트 어셈블리에 관한 것이다.The present invention relates to a backlight assembly, and more particularly, to a backlight assembly which prevents the occurrence of help in optical sheets due to bending of the light guide plate by protruding a corner portion of the light guide plate facing each other.

일반적으로, 정보화 사회에서 LCD 모듈의 개발은 눈부시게 발전하고 있으며 그 역할도 중요화되고 있다. LCD 모듈은 자체 발광을 하지 못하는 수광소자이기 때문에 일반적으로 투과형 LCD 모듈에서는 빛을 전달하는 백라이트(back light unit)가 반드시 필요하게 된다. In general, the development of the LCD module in the information society has developed remarkably and its role is becoming important. Since LCD modules are light-receiving elements that do not emit light in themselves, generally, a back light unit for transmitting light is required in a transmissive LCD module.

이러한, 백라이트는 크게 LCD 모듈의 광원으로 사용되는 램프 어셈블리(lamp assembly)와, 램프 어셈블리에서 발생된 빛을 LCD 패널로 안내하는 도광판과, 도광판에서 안내된 빛을 확산하고 집광하는 시트류와, 램프 어셈블리, 도광판, 시트류 등을 수납하여 고정하는 몰드프레임(mold frame)으로 구성된다.The backlight is largely a lamp assembly used as a light source of the LCD module, a light guide plate for guiding the light generated from the lamp assembly to the LCD panel, a sheet for diffusing and condensing the light guided from the light guide plate, and a lamp. It consists of a mold frame for accommodating and fixing the assembly, the light guide plate, sheets, and the like.

여기서, 백라이트의 부재들은 일정한 제작 공차를 가지고 설계되며, 이로 인해 각각의 부재들을 몰드프레임에 고정하였을 경우 몰드프레임과 각각의 부재들 사이에 소정의 제작 공차, 즉 갭(gap)이 발생된다. Here, the members of the backlight are designed to have a certain manufacturing tolerance, and thus, when each member is fixed to the mold frame, a predetermined manufacturing tolerance, that is, a gap is generated between the mold frame and the respective members.

그러나, 앞에서 설명한 각 부재들의 제작 공차는 액정표시장치의 신뢰성을 테스트하기 위해 액정표시장치에 고온의 열을 가하면 각 부재들이 열에 의해 팽창과 수축을 반복하게 된다. However, the manufacturing tolerance of each member described above is that when the high temperature heat is applied to the liquid crystal display device to test the reliability of the liquid crystal display device, each member repeats expansion and contraction by the heat.

이때, 몰드프레임과 도광판 사이에 발생된 갭이 도광판의 열팽창 계수보다 작을 경우 도광판이 LCD 패널 쪽으로 휘어지거나 몰드프레임의 기저면 쪽으로 휘어지게 된다.At this time, when the gap generated between the mold frame and the light guide plate is smaller than the thermal expansion coefficient of the light guide plate, the light guide plate is bent toward the LCD panel or toward the base surface of the mold frame.

여기서, 도광판의 중앙부분이 몰드프레임의 기저면 쪽으로 휘어져 도광판의 가장자리가 LCD 패널 쪽으로 상승되면 도광판의 가장자리가 광학시트류들을 LCD 패널 쪽으로 밀착시키면서 광학시트류들의 가장자리를 눌러 광학시트류들의 열팽창과 수축을 방해한다. 이로 인해 광학 시트류들에 움이 발생되어 액정표시장치의 화질이 저하된다.Here, when the center portion of the light guide plate is bent toward the base surface of the mold frame and the edge of the light guide plate is raised toward the LCD panel, the edge of the light guide plate presses the edges of the optical sheets to the LCD panel while pressing the edges of the optical sheets toward the LCD panel, thereby causing thermal expansion and contraction of the optical sheets. Disturb. As a result, the optical sheets are generated to deteriorate the quality of the liquid crystal display.

따라서, 본 발명의 목적은 상기와 같은 문제점을 감안하여 안출된 것으로써, 도광판의 가장자리부분이 광학시트류들과 접촉되는 것을 방지하여 액정표시장치의 화질을 상승시키는데 있다.Accordingly, an object of the present invention has been devised in view of the above problems, to prevent the edge portion of the light guide plate from contacting the optical sheets, thereby improving the image quality of the liquid crystal display device.

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

이와 같은 목적을 달성하기 위해서 본 발명은 도광판의 모서리들 중에서 서로 대향하는 한쌍의 모서리부분을 소정길이 돌출시켜 돌출부를 형성하고, 서로 대응되는 몰드프레임의 양측면에 돌출부와 대응하는 삽입홈을 형성하여 돌출부를 삽입홈에 억지끼워 맞춤 한다.In order to achieve the above object, the present invention forms a protrusion by protruding a pair of corner portions facing each other among the edges of the light guide plate, and forming insertion grooves corresponding to the protrusions on both sides of the mold frame corresponding to each other. To fit into the insertion groove.

이하, 본 발명에 의한 백라이트 어셈블리의 구조를 첨부된 도면 도 1을 참조하여 설명하면 다음과 같다.Hereinafter, the structure of the backlight assembly according to the present invention will be described with reference to FIG. 1.

도 1에 도시된 바와 같이 램프 어셈블리(도시 안됨)에서 발산되는 빛을 LCD 패널(도시 안됨) 쪽으로 안내하는 도광판(110)은 사각 형상으로, 램프 어셈블리와 인접하는 도광판(110)의 길이방향 일측면은 두께가 두껍게 형성되고, 도광판(110)의 길이방향 타측면은 두께가 얇게 형성되어 소정기울기로 기울어진다.As illustrated in FIG. 1, the light guide plate 110 for guiding light emitted from a lamp assembly (not shown) toward an LCD panel (not shown) has a rectangular shape and has one longitudinal side surface of the light guide plate 110 adjacent to the lamp assembly. The thickness of the silver is formed thick, and the other side in the longitudinal direction of the light guide plate 110 is formed to be thin and inclined to a predetermined slope.

또한, 두께가 얇은 도광판(110)의 길이방향 타측면의 양단에는 도광판(110)이 램프 어셈블리에서 발산되는 열에 의해 휘어지는 것을 방지하기 위해 돌출부(112)가 소정길이로 돌출 형성된다.In addition, at both ends of the other longitudinal side surface of the light guide plate 110 having a thin thickness, the protrusions 112 protrude to a predetermined length to prevent the light guide plate 110 from being bent by heat emitted from the lamp assembly.

한편, 앞에서 설명한 바와 같이 구성된 도광판(110)을 삽입하여 고정하는 몰드프레임(120)은 상부면 가장자리를 따라 도광판(110)을 삽입할 수 있도록 수납공간(124)이 형성된다. 또한, 돌출부(112)가 형성된 위치와 대응되는 수납공간(124)의 단변방향 양측면에는 돌출부(112)를 강압적으로 삽입하여 도광판(110)의 가장자리부분이 LCD 패널 쪽으로 휘어지는 것을 방지하는 삽입홈(122)이 돌출부(112)보다 약간 더 크게 형성된다.On the other hand, the mold frame 120 for inserting and fixing the light guide plate 110 configured as described above is formed with a receiving space 124 to insert the light guide plate 110 along the upper surface edge. In addition, insertion grooves 122 forcibly inserting the protrusions 112 on both side surfaces of the storage space 124 corresponding to the positions where the protrusions 112 are formed to prevent the edges of the light guide plate 110 from bending toward the LCD panel. ) Is slightly larger than the protrusion 112.

도광판(110)의 상부면에는 도광판(110)에서 안내된 빛을 확산하고 집광하여 휘도를 상승시키는 광학 시트류들(130)이 적재된다.On the upper surface of the light guide plate 110, optical sheets 130 for diffusing and converging the light guided by the light guide plate 110 to increase brightness are loaded.

이와 같이 구성된 몰드프레임(120)에 도광판(110)을 삽입할 경우 몰드프레임(120)의 삽입홈(122)에 도광판(110)의 돌출부(112)가 끼워지고 신뢰성 테스트를 하기 위해 액정표시장치에 고온의 열을 가하면 도광판(110)이 열팽창되어 돌출부(112)가 삽입홈(122)에 억지끼워 맞춤됨으로써, 몰드프레임(120)이 도광판(110)의 가장자리를 잡고 있어 도광판(110)의 가장자리부분이 LCD 패널 쪽으로 상승되는 것을 방지한다. When the light guide plate 110 is inserted into the mold frame 120 configured as described above, the protrusion 112 of the light guide plate 110 is inserted into the insertion groove 122 of the mold frame 120, and the liquid crystal display device is tested for reliability. When the high temperature is applied, the light guide plate 110 is thermally expanded and the protrusion 112 is fitted to the insertion groove 122 so that the mold frame 120 is holding the edge of the light guide plate 110 so that the edge portion of the light guide plate 110 can be adjusted. This prevents it from rising towards the LCD panel.

이상에서 설명한 바와 같이 도광판의 서로 대향하는 한쌍의 모서리부분에 돌출부를 형성하고, 돌출부와 대응되는 몰드프레임에 돌출부를 삽입하는 삽입홈을 형성하여 도광판을 끼우면 몰드프레임이 도광판의 가장자리를 잡고 있어 도광판의 열팽창에 의해 도광판의 가장자리가 LCD 패널 쪽으로 휘어지는 것을 방지할 수 있다.As described above, protrusions are formed at a pair of corner portions of the light guide plate that face each other, and insertion grooves for inserting the protrusions are formed in the mold frame corresponding to the protrusions to insert the light guide plate, whereby the mold frame holds the edge of the light guide plate. It is possible to prevent the edge of the light guide plate from bending toward the LCD panel by thermal expansion.

따라서, 도광판의 상부에 적재된 광학 시트류들의 가장자리부분이 도광판의 가장자리부분에 눌리지 않기 때문에 움이 발생되는 것을 방지할 수 있어 액정표시장치의 화질을 향상시킬 수 있는 효과가 있다.Therefore, since the edges of the optical sheets stacked on the light guide plate are not pressed against the edges of the light guide plate, it is possible to prevent the occurrence of erosion, thereby improving the image quality of the liquid crystal display device.

도 1은 본 발명에 의한 백라이트 어셈블리의 구조를 나타낸 분해 사시도이다.1 is an exploded perspective view showing the structure of a backlight assembly according to the present invention.

Claims (2)

빛을 발산하는 램프 어셈블리와 인접하는 일측면의 두께는 두껍게 형성되고, 타측면의 두께는 얇게 형성되어 소정기울기로 기울어지며, 상기 두께가 얇은 타측면의 양단에는 상기 타측면의 길이 방향을 따라 소정 길이로 돌출된 한쌍의 돌출부가 형성된 도광판;The thickness of one side adjacent to the lamp assembly that emits light is formed thick, the thickness of the other side is formed to be thin and inclined to a predetermined slope, at both ends of the other side of the thin thickness is predetermined along the longitudinal direction of the other side A light guide plate having a pair of protrusions protruding in length; 상부면에 상기 도광판이 삽입되는 수납공간이 형성되고, 상기 돌출부와 대응되는 양측면에 상기 돌출부가 끼워지는 삽입홈이 형성된 몰드 프레임; 및A mold frame in which an accommodation space into which the light guide plate is inserted is formed on an upper surface, and an insertion groove into which the protrusion is fitted on both sides corresponding to the protrusion; And 상기 도광판의 상부면에 적재되어 상기 도광판에서 안내된 빛을 확산하고 집광하는 광학 시트류들을 포함하는 것을 특징으로 하는 백라이트 어셈블리.And an optical sheet mounted on an upper surface of the light guide plate to diffuse and collect light guided by the light guide plate. 제 1 항에 있어서, 상기 삽입홈은 상기 돌출부보다 약간 크게 형성되고, 상기 도광판이 열팽창했을 때 상기 돌출부가 상기 삽입홈에 억지끼워 맞춤되는 것을 특징으로 하는 백라이트 어셈블리.The backlight assembly of claim 1, wherein the insertion groove is slightly larger than the protrusion, and the protrusion is fitted to the insertion groove when the light guide plate is thermally expanded.
KR1019980030529A 1998-07-29 1998-07-29 Backlight assembly KR100532867B1 (en)

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Publication number Priority date Publication date Assignee Title
JP3662788B2 (en) * 1999-10-06 2005-06-22 Ｎｅｃ液晶テクノロジー株式会社 Liquid crystal display device and portable information terminal device
JP3852658B2 (en) * 1999-12-01 2006-12-06 株式会社エンプラス Light guide plate, side light type surface light source device, and liquid crystal display device
KR100701014B1 (en) * 2000-11-22 2007-03-29 삼성전자주식회사 A light guide plate, a liquid crystal display module and a liquid crystal display device having the same
KR100779447B1 (en) * 2005-11-28 2007-11-26 엔 하이테크 주식회사 Injection mold for light guide panel, injection method with said injection mold
WO2009008617A2 (en) 2007-07-06 2009-01-15 Lg Innotek Co., Ltd Display device
KR100893062B1 (en) * 2007-07-13 2009-04-15 엘지이노텍 주식회사 Receiving Device
US10007047B2 (en) 2010-12-23 2018-06-26 Samsung Display Co., Ltd. Display apparatus having thermally protected backlight assembly
KR101262634B1 (en) 2011-03-14 2013-05-08 엘지이노텍 주식회사 Display device

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Publication number Priority date Publication date Assignee Title
JPH09147618A (en) * 1995-11-20 1997-06-06 Sharp Corp Lighting system
KR980010963A (en) * 1996-07-11 1998-04-30 김광호 Display device
KR19980075053A (en) * 1997-03-28 1998-11-05 윤종용 Structure of a liquid crystal display device, particularly concerned in preventing a light guide plate and sheets from being moved owing to external shock by fixing them to a mold frame
KR19990020488U (en) * 1997-11-26 1999-06-15 김영환 LGP fixing structure of backlight unit for LCD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09147618A (en) * 1995-11-20 1997-06-06 Sharp Corp Lighting system
KR980010963A (en) * 1996-07-11 1998-04-30 김광호 Display device
KR19980075053A (en) * 1997-03-28 1998-11-05 윤종용 Structure of a liquid crystal display device, particularly concerned in preventing a light guide plate and sheets from being moved owing to external shock by fixing them to a mold frame
KR19990020488U (en) * 1997-11-26 1999-06-15 김영환 LGP fixing structure of backlight unit for LCD

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