KR19990017131A - LCD Display - Google Patents

LCD Display Download PDF

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Publication number
KR19990017131A
KR19990017131A KR1019970039921A KR19970039921A KR19990017131A KR 19990017131 A KR19990017131 A KR 19990017131A KR 1019970039921 A KR1019970039921 A KR 1019970039921A KR 19970039921 A KR19970039921 A KR 19970039921A KR 19990017131 A KR19990017131 A KR 19990017131A
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KR
South Korea
Prior art keywords
guide plate
light guide
liquid crystal
crystal display
light
Prior art date
Application number
KR1019970039921A
Other languages
Korean (ko)
Inventor
이영재
Original Assignee
윤종용
삼성전자 주식회사
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Publication date
Application filed by 윤종용, 삼성전자 주식회사 filed Critical 윤종용
Priority to KR1019970039921A priority Critical patent/KR19990017131A/en
Publication of KR19990017131A publication Critical patent/KR19990017131A/en

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Classifications

    • 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
    • G02B6/0013—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
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • 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
    • 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

액정표시장치의 백라이트 어셈블리중 도광판의 내부에 캐비티를 형성하므로서 도광판의 무게를 상당히 줄일 수 있으며, 이에 따라 액정표시장치의 경량화에 커다란 기여를 하게 되는 이점이 있다.By forming a cavity in the light guide plate of the backlight assembly of the liquid crystal display device, the weight of the light guide plate can be considerably reduced, and thus, there is an advantage in that the weight of the liquid crystal display device is greatly contributed.

Description

액정표시장치LCD Display

본 발명은 액정표시장치에 관한 것으로, 보다 상세하게는 액정표시장치의 백라이트 어셈블리(backlight assembly)를 구성하는 도광판(Light Guide Plate)의 내부를 빈 공간으로 형성하므로서 도광판의 무게를 줄여 궁극적으로 제품의 경량화를 이룰 수 있는 액정표시장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to reduce the weight of a light guide plate by forming an empty space inside a light guide plate constituting a backlight assembly of the liquid crystal display device. The present invention relates to a liquid crystal display device capable of achieving a light weight.

일반적으로 액정표시장치는 자체 발광하지 못하는 수광소자로써, 어두운 곳에서는 사용할 수 없기 때문에 액정패널 후면에 부착된 백라이트를 이용하여 화상을 디스플레이시킨다.In general, a liquid crystal display is a light receiving element that does not emit light by itself, and thus cannot be used in a dark place, and thus displays an image by using a backlight attached to the back of the liquid crystal panel.

최근에는 제품의 경쟁력을 확보하기 위해 슬림화 및 경량화를 위하여 여러 가지 구조가 개발되고 있다. 특히 액정표시장치가 주로 휴대용 컴퓨터등에 사용되는 점에 비추어 경량화는 더욱 비중있게 취급되고 있다.Recently, various structures have been developed for slimming and lightening in order to secure the competitiveness of products. In particular, in view of the fact that the liquid crystal display device is mainly used in portable computers, weight reduction is treated more heavily.

그러나 이와 같은 종래의 액정표시장치에 있어서, 백라이트 어셈블리중 아크릴이나 투명재질의 플라스틱으로 이루어진 도광판이 차지하는 무게는 약 70% 정도로 제품의 경량화에 가장 큰 장애요인으로 작용하였다.However, in the conventional liquid crystal display device, the weight of the light guide plate made of acrylic or transparent plastic in the backlight assembly is about 70%, which is the biggest obstacle to the weight reduction of the product.

본 발명은 이러한 종래의 문제점을 해결하기 위한 것으로, 도광판의 무게를 감소시키므로서 제품자체의 무게를 경감시킨 액정표시장치를 제공하는데 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a liquid crystal display device which reduces the weight of the product itself while reducing the weight of the light guide plate.

도 1은 본 발명에 따른 액정표시장치의 단면도이다.1 is a cross-sectional view of a liquid crystal display device according to the present invention.

본 발명에 따르면, 반사시트, 도광판, 프리즘시트 및 확산시트를 수용하는 몰드프레임과; 몰드프레임상에 쿠션테이프를 개재하여 장착된 LCD 패널과; 몰드프레임과 LCD 패널을 일체로 지지고정하는 톱 샤시를 포함하며, 도광판의 내부에 캐비티가 형성된 액정표시장치가 개시된다.According to the present invention, a mold frame for receiving a reflective sheet, a light guide plate, a prism sheet and a diffusion sheet; An LCD panel mounted on the mold frame via cushion tape; Disclosed is a liquid crystal display including a top chassis for integrally supporting and fixing a mold frame and an LCD panel, and having a cavity formed inside the light guide plate.

또한 선택적으로 도광판의 하부면에는 빛의 균일한 반사를 위해 다수의 도트가 인쇄될 수 있다.Also optionally, a plurality of dots may be printed on the lower surface of the light guide plate for uniform reflection of light.

이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1을 참조하면, 몰드프레임(mold frame; 1)은 액정표시장치 전체를 지지하면서 반사시트(reflector; 3), 도광판(Light Guide Plate; 2), 프리즘 시트(prism sheet; 4), 확산시트(diffuser; 5) 및 보호시트(protector; 6)를 수용하고 있다. 또한 도광판(2)의 일측 또는 양측 단부에는 수 ㎜ 직경의 형광램프(미도시)가 설치된다.Referring to FIG. 1, a mold frame 1 supports a whole liquid crystal display while reflecting the entire liquid crystal display device 3, a light guide plate 2, a prism sheet 4, and a diffusion sheet. (diffuser 5) and protector (6). In addition, one or both ends of the light guide plate 2 are provided with a fluorescent lamp (not shown) of several mm in diameter.

도광판(2)은 형광램프로부터의 빛을 화면표시영역에 균일하게 전달한다.The light guide plate 2 uniformly transmits the light from the fluorescent lamp to the screen display area.

본 발명에 따르면, 도광판(2)의 내부에는 캐비티(2a)가 형성된다. 캐비티(2a)는 최초 도광판(2)을 사출성형하여 제작할 때에 형성되는 바, 이를 구체적으로 설명하면, 사각형상으로 압출되어 오는 성형재료의 일부분을 양끝이 밀폐되는 금형사이에 끼워넣고 압축된 가스를 주입하여 성형재료를 팽창시켜 금형 내면에 고착시켜 성형한다. 이후 내부의 가스를 제거하고 봉입하여 도광판을 완성한다. 사용되는 성형재질은 투명 아크릴 재질 또는 플라스틱 재질로서 형성되는 도광판의 두께는 수 ㎜ 정도이다. 또한 도광판(2)의 하부면에는 빛의 균일한 반사를 위해 다수의 도트(dot)나 V자 홈이 형성된다.According to the present invention, the cavity 2a is formed inside the light guide plate 2. The cavity 2a is formed when the first light guide plate 2 is manufactured by injection molding. Specifically, the cavity 2a is sandwiched between a mold whose both ends are sealed by inserting a part of a molding material extruded in a square shape and pressurized gas. Injection is made to expand the molding material is fixed to the mold inner surface to be molded. Thereafter, the gas inside is removed and sealed to complete the light guide plate. The molding material used is a transparent acrylic material or a plastic, the thickness of the light guide plate is about several mm. In addition, a plurality of dots or V-shaped grooves are formed on the lower surface of the light guide plate 2 for uniform reflection of light.

반사시트(1)는 도광판(2)의 하부에 설치되며 램프로부터 나온 빛이 도광판(2)으로 입사되어 하부로 나오는 빛들을 상부쪽으로 반사시키는 역할을 한다.The reflective sheet 1 is installed at the lower portion of the light guide plate 2 and serves to reflect light emitted from the lamp to the light guide plate 2 and exit from the lower side.

프리즘 시트(4)와 확산시트(5)는 2 내지 3 장이 적절히 조합되어 도광판(2) 위에 설치되는데 도광판(2)으로부터 나온 빛을 확산 또는 집광시켜 휘도를 향상하거나 시야각을 개선한다.The prism sheet 4 and the diffusion sheet 5 are suitably combined in two or three sheets and installed on the light guide plate 2 to diffuse or condense the light emitted from the light guide plate 2 to improve brightness or improve the viewing angle.

또한 백라이트 어셈블리의 최상층에는 보호시트(6)이 설치되어 먼지나 스크래치(scratch)에 민감한 시트들을 보호하고 백라이트 어셈블리만을 운반할 때 시트들의 유동을 방지하는 역할을 한다.In addition, a protective sheet 6 is installed on the top layer of the backlight assembly to protect sheets sensitive to dust and scratches and to prevent the sheets from flowing when only the backlight assembly is transported.

이때, 상기 보호시트(6)를 몰드프레임(1)에 부착하는 방법을 구체적으로 설명하면, 보호시트(6) 하면의 상하 또는 좌우 양측단에 좁은 폭, 가령 1∼3 ㎜ 정도의 폭으로 절단한 양면테이프(11)를 부착한 후, 몰드프레임(1)에 양면테이프를 부착시킨다.In this case, the method of attaching the protective sheet 6 to the mold frame 1 will be described in detail. The upper and lower sides of the protective sheet 6 or the left and right sides of the protective sheet 6 are cut in a narrow width, for example, about 1 to 3 mm. After attaching one double-sided tape 11, the double-sided tape is attached to the mold frame 1.

이와 같이 구성된 백라이트 어셈블리와 액정패널을 조립하는 방법을 설명하면, 쿠션테이프(10)를 보호시트(6)의 일부에 걸치도록 설치하고 이 위에 상하대향된 한 쌍의 액정패널(7, 8)을 올려 놓은 다음, 톱 샤시(top chassis; 12)로 상부 액정패널(8)의 상면 가장자리 전체에 걸쳐 눌러 고정시킨다.The method of assembling the backlight assembly and the liquid crystal panel configured as described above will be described so that the cushion tape 10 is installed to cover a part of the protective sheet 6 and the pair of liquid crystal panels 7 and 8 facing up and down are disposed thereon. After mounting, the top chassis 12 is pressed to fix the entire upper edge of the upper liquid crystal panel 8.

이와 같이 구성된 액정표시장치의 백라이트 어셈블리의 작용을 설명하면 다음과 같다.The operation of the backlight assembly of the liquid crystal display device configured as described above is as follows.

램프에서 발산된 빛은 도트인쇄된 도광판(2)에 직접 전달되거나 램프홀더(미도시)에 반사되어 도광판(2)에 전달된다. 도광판(2)에 입사된 빛의 일부는 도광판을 통해 그대로 진행하고 그 일부는 반사시트(3)에 의하여 반사된 후 도광판(2) 내부를 진행하게 된다. 도광판(2)을 통해 나온 빛은 프리즘 시트(4) 및 확산시트(5)를 통과하면서 균일하게 확산되고 휘도가 상승된다. 이어 빛은 액정패널(7, 8)의 각 화소로 입사되어 화면을 표시한다.The light emitted from the lamp is directly transmitted to the dot printed LGP 2 or reflected from the lamp holder (not shown) to the LGP 2. Some of the light incident on the light guide plate 2 proceeds as it is through the light guide plate, and a part of the light is reflected by the reflective sheet 3 and then travels inside the light guide plate 2. Light emitted through the light guide plate 2 is uniformly diffused and luminance is increased while passing through the prism sheet 4 and the diffusion sheet 5. Light is then incident on each pixel of the liquid crystal panels 7 and 8 to display the screen.

한편, 본 발명에 따르면 도광판(2)의 내부에는 캐비티(2a)가 형성되어 도광판의 무게를 상당히 줄일 수 있게 된다. 이에 따라 상기한 바와 같이 백라이트 어셈블리중 도광판이 차지하는 무게는 약 70% 정도이기 때문에 도광판의 무게를 줄인다는 것은 액정표시장치의 무게를 줄이는 것과 직접적으로 관련을 갖게 되므로 액정표시장치의 경량화에 커다란 기여를 하게 된다.Meanwhile, according to the present invention, the cavity 2a is formed inside the light guide plate 2, thereby significantly reducing the weight of the light guide plate. Accordingly, as described above, since the weight of the light guide plate of the backlight assembly is about 70%, reducing the weight of the light guide plate is directly related to reducing the weight of the liquid crystal display device. Done.

상기한 바와 같이 본 발명에 의하면, 도광판의 내부에 캐비티를 형성하므로서 도광판의 무게를 상당히 줄일 수 있으며, 이에 따라 액정표시장치의 경량화에 커다란 기여를 하게 되는 이점이 있다.As described above, according to the present invention, by forming a cavity in the light guide plate, the weight of the light guide plate can be considerably reduced, and thus, there is an advantage in that the weight of the liquid crystal display device is greatly contributed.

Claims (2)

반사시트, 도광판, 프리즘시트 및 확산시트를 수용하는 몰드프레임과;A mold frame accommodating a reflection sheet, a light guide plate, a prism sheet, and a diffusion sheet; 상기 몰드프레임상에 쿠션테이프를 개재하여 장착된 LCD 패널과;An LCD panel mounted on the mold frame via cushion tape; 상기 몰드프레임과 상기 LCD 패널을 일체로 지지고정하는 톱 샤시를 포함하며,It includes a top chassis for holding and fixing the mold frame and the LCD panel integrally, 상기 도광판의 내부에는 캐비티가 형성되는 것을 특징으로 하는 액정표시장치.And a cavity is formed in the light guide plate. 제 1 항에 있어서, 상기 도광판의 하부면에는 빛의 균일한 반사를 위해 다수의 도트가 인쇄된 것을 특징으로 하는 액정표시장치.The liquid crystal display of claim 1, wherein a plurality of dots are printed on a lower surface of the light guide plate for uniform reflection of light.
KR1019970039921A 1997-08-21 1997-08-21 LCD Display KR19990017131A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100728060B1 (en) * 2005-11-01 2007-06-13 (주)코이즈 Improvement Structure of Light Guide Panel
WO2009006380A3 (en) * 2007-07-03 2009-03-26 3M Innovative Properties Co A backlight assemblies having a transmissive optical film
KR101296536B1 (en) * 2006-06-30 2013-08-13 엘지디스플레이 주식회사 Liquid crystal display device

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Publication number Priority date Publication date Assignee Title
KR880008060A (en) * 1986-12-16 1988-08-30 구자학 LCD Display
JPH0278924U (en) * 1988-12-06 1990-06-18
JPH02272486A (en) * 1989-04-13 1990-11-07 Fujitsu Ltd Back light
JPH0736035A (en) * 1993-07-22 1995-02-07 Ohtsu Tire & Rubber Co Ltd :The Surface light emitter
KR100283562B1 (en) * 1993-06-21 2001-03-02 김순택 Surface light source device

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Publication number Priority date Publication date Assignee Title
KR880008060A (en) * 1986-12-16 1988-08-30 구자학 LCD Display
JPH0278924U (en) * 1988-12-06 1990-06-18
JPH02272486A (en) * 1989-04-13 1990-11-07 Fujitsu Ltd Back light
KR100283562B1 (en) * 1993-06-21 2001-03-02 김순택 Surface light source device
JPH0736035A (en) * 1993-07-22 1995-02-07 Ohtsu Tire & Rubber Co Ltd :The Surface light emitter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100728060B1 (en) * 2005-11-01 2007-06-13 (주)코이즈 Improvement Structure of Light Guide Panel
KR101296536B1 (en) * 2006-06-30 2013-08-13 엘지디스플레이 주식회사 Liquid crystal display device
WO2009006380A3 (en) * 2007-07-03 2009-03-26 3M Innovative Properties Co A backlight assemblies having a transmissive optical film

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