KR100544818B1 - Backlight assembly of LCD module - Google Patents

Backlight assembly of LCD module Download PDF

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Publication number
KR100544818B1
KR100544818B1 KR1019980026895A KR19980026895A KR100544818B1 KR 100544818 B1 KR100544818 B1 KR 100544818B1 KR 1019980026895 A KR1019980026895 A KR 1019980026895A KR 19980026895 A KR19980026895 A KR 19980026895A KR 100544818 B1 KR100544818 B1 KR 100544818B1
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KR
South Korea
Prior art keywords
lamp
guide plate
light guide
light
backlight assembly
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KR1019980026895A
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Korean (ko)
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KR20000007523A (en
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이희춘
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삼성전자주식회사
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Priority to KR1019980026895A priority Critical patent/KR100544818B1/en
Publication of KR20000007523A publication Critical patent/KR20000007523A/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
    • G02F1/1335—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
    • 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
    • G02B6/0081—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
    • G02B6/009—Positioning aspects of the light source in the package
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

램프 반사판을 화면유효영역의 단부까지 연장하고 반사 시트류와 연장된 램프 반사판을 겹치도록 하여 화면유효영역에서의 빛샘을 방지하여 균일한 휘도를 얻을 수 있다.The lamp reflector extends to the end of the screen effective area and overlaps the reflective sheets and the extended lamp reflector to prevent light leakage in the screen effective area, thereby obtaining uniform luminance.

Description

엘씨디 모듈의 백라이트 어셈블리Backlight Assembly of LCD Module

본 발명은 LCD 모듈의 백라이트 어셈블리에 관한 것으로, 더욱 상세하게는 램프 어셈블리로부터 빛샘이 발생하는 것을 방지한 LCD 모듈의 백라이트 어셈블리에 관한 것이다.The present invention relates to a backlight assembly of an LCD module, and more particularly, to a backlight assembly of an LCD module that prevents light leakage from a lamp assembly.

일반적으로, 정보화 사회에서 LCD의 개발은 눈부시게 발전하고 있으며 그 역할도 중요화되고 있다. LCD는 자체 발광을 하지 못하기 때문에 일반적으로 사용되는 투과형 LCD에서는 백라이트 어셈블리(backlight unit)가 꼭 필요하며, LCD의 성능은 LCD 자체만이 아니라 사용하는 백라이트의 성능에 의존하는 바가 크다. 이러한, 백라이트 어셈블리는 크게 도광판, 램프 어셈블리(lamp assembly) 및 몰드프레임(mold frame)으로 구성되어 있다.In general, the development of LCD in the information society is developing remarkably and its role is becoming important. Since the LCD does not emit light by itself, a backlight unit is required for a commonly used transmissive LCD, and the performance of the LCD depends not only on the LCD itself but also on the performance of the backlight used. Such a backlight assembly is mainly composed of a light guide plate, a lamp assembly, and a mold frame.

이와 같은 LCD는 주로 랩탑형 컴퓨터 또는 LCD 모니터 등과 같이 휴대가 용이한 제품에 많이 사용되므로 LCD의 경박단소화가 요구되고 있으며, 이를 실현하기 위해서 도 1에 도시 바와 같이 LCD 패널(10)의 화면유효영역(Active Area)의 가장자리에서 몰드 프레임까지의 거리(a)가 계속적으로 좁아지고 있는 추세이다.Such LCDs are mainly used in portable products such as laptop computers or LCD monitors, and thus, thin and small LCDs are required. To realize this, the effective screen area of the LCD panel 10 is illustrated in FIG. The distance (a) from the edge of the (Active Area) to the mold frame is steadily narrowing.

기존의 백라이트 어셈블리 구조(20)는 몰드프레임(30) 내부에 LCD의 광원으로 사용되는 램프 어셈블리(40)가 삽입되어 있다. 램프 어셈블리(40)는 광을 발산하는 램프(41)와 램프(41)에서 발산된 빛을 반사하기 위해 램프(41)를 감싸고 있는 램프 반사판(43)으로 구성되어 있다.In the conventional backlight assembly structure 20, a lamp assembly 40 used as a light source of the LCD is inserted into the mold frame 30. The lamp assembly 40 is composed of a lamp 41 emitting light and a lamp reflector 43 surrounding the lamp 41 to reflect light emitted from the lamp 41.

램프 어셈블리(40)에는 램프(41)에서 발산된 빛을 안내하는 도광판(51) 및 도광판(51)으로부터 새어나온 빛을 다시 도광판(41)으로 전달하는 반사시트(53)가 삽입되어 있다. 여기서, 반사시트(53)는 도광판(51)의 하부면에 설치되며 도광판(51)의 크기와 같거나 제작 공차로 인해 도광판(51)의 크기보다 작다.The lamp assembly 40 has a light guide plate 51 for guiding light emitted from the lamp 41 and a reflective sheet 53 for transmitting light leaked from the light guide plate 51 to the light guide plate 41. Here, the reflective sheet 53 is installed on the lower surface of the light guide plate 51 and is the same as the size of the light guide plate 51 or smaller than the size of the light guide plate 51 due to manufacturing tolerances.

또한, 도광판(51)의 상부면에는 도광판(51)의 크기보다 작고 몰드프레임(30)의 내측 가장자리와 소정간격 이격되어 시트류들(55)이 설치되어 있으며, 몰드프레임(30)의 상부면에는 하부 기판인 TFT 기판(61)과 상부 기판인 칼라필터 기판(63)으로 구성되어 있으며 정보를 디스플레이 해주는 LCD 패널(60)이 설치된다.In addition, the upper surface of the light guide plate 51 is smaller than the size of the light guide plate 51 and is spaced apart from the inner edge of the mold frame 30 by a predetermined distance, the sheets 55 are installed, the upper surface of the mold frame 30 The LCD panel 60, which consists of a lower substrate TFT substrate 61 and an upper substrate color filter substrate 63, displays information.

그러나, 종래 LCD 모듈의 백라이트 어셈블리는 반사판(43)과 시트류(55)들이 겹쳐지지 않고 단순하게 접촉되어 있거나 소정 거리 이격되어 있어 이 부분으로 빛샘 현상이 발생하게 되어 화면유효영역 부분이 다른 부분에 비하여 현저하게 밝아 보이는 문제점이 있다.However, in the backlight assembly of the conventional LCD module, the reflecting plate 43 and the sheets 55 are not overlapped and are simply contacted or spaced at a predetermined distance so that light leakage occurs in this area, so that the screen effective area is different from the other parts. There is a problem that looks remarkably bright compared to.

따라서 본 발명은 이와 같은 종래 문제점을 감안한 것으로써 본 발명의 목적은 백라이트 어셈블리의 반사판과 시트류들이 소정 면적만큼 겹쳐지도록 하여 빛샘을 방지하여 화면유효영역 부분에서 발생하는 휘도 증가를 방지함에 있다.Accordingly, the present invention has been made in view of such a conventional problem, and an object of the present invention is to prevent light leakage by preventing light leakage by overlapping a reflector plate and sheets of a backlight assembly by a predetermined area, thereby preventing an increase in luminance occurring in an area of an effective screen area.

이와 같은 본 발명의 목적을 달성하기 위한 LCD 모듈의 백라이트 어셈블리는 몰드프레임과, 상기 몰드프레임에 고정되는 램프 및 램프 반사판으로 형성된 램프 어셈블리와, 상기 램프 어셈블리에 설치된 도광판과, 상기 도광판의 하부에 설치된 반사시트와, 상기 도광판의 상부에 설치되어 상기 도광판으로부터 안내된 광을 상기 TFT-LCD 패널에 전달하는 복수매의 시트류들을 포함하는 LCD 백라이트 어셈블리를 포함하며, 상기 램프 반사판은 화면 유효 영역까지 연장되어 상기 화면 유효 영역 부분에서 빛샘이 발생하는 것을 방지한다.In order to achieve the object of the present invention, a backlight assembly of an LCD module includes a mold frame, a lamp assembly formed of a lamp and a lamp reflector fixed to the mold frame, a light guide plate installed on the lamp assembly, and a lower portion of the light guide plate. An LCD backlight assembly including a reflective sheet and a plurality of sheets mounted on top of the light guide plate to transfer light guided from the light guide plate to the TFT-LCD panel, wherein the lamp reflector extends to an effective area of the screen; This prevents light leakage from occurring in the screen effective area portion.

바람직하게는, 상기 램프반사판이 상기 복수매의 시트류 중 적어도 하나의 시트류와 겹치도록 하여 상기 화면 유효 영역 부분에서 빛샘이 발생되는 것을 방지하도록 한다.Preferably, the lamp reflector is overlapped with at least one sheet of the plurality of sheets to prevent light leakage from occurring in the screen effective area.

이하, 본 발명 LCD 모듈의 백라이트 어셈블리를 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, the backlight assembly of the LCD module of the present invention will be described with reference to the accompanying drawings.

몰드프레임(130) 내부에 LCD 모듈의 광원으로 사용되는 램프 어셈블리(140)가 삽입되어 있다. 램프 어셈블리(140)는 광을 발산하는 램프(141)와 램프(141)에서 발산된 빛을 반사하기 위해 램프(141)를 감싸고 있으며 내측면이 도금처리된 램프를 반사판(143)으로 구성되어 있다.The lamp assembly 140 used as a light source of the LCD module is inserted into the mold frame 130. The lamp assembly 140 includes a lamp 141 that emits light and a lamp 141 that surrounds the lamp 141 to reflect light emitted from the lamp 141, and a lamp having an inner surface plated with a reflector plate 143. .

램프 어셈블리(140)에는 램프(141)에서 발산된 광을 안내하는 도광판(151)과 도광판(151) 하부면에 설치되어 도광판(151)의 하부면으로 새어나온 빛을 다시 도광판(151)으로 전달하는 반사시트(153)의 일측면이 삽입되어 있다. 여기서, 반사시트(153)의 에지부는 도광판(151)의 에지부와 같거나 빛고임 현상을 제거하기 위해 도광판(151)의 에지부 보다 크게 설계되어 있다.The lamp assembly 140 is installed on the light guide plate 151 for guiding the light emitted from the lamp 141 and the lower surface of the light guide plate 151 to transfer the light leaked to the lower surface of the light guide plate 151 back to the light guide plate 151. One side of the reflective sheet 153 is inserted. Here, the edge portion of the reflective sheet 153 is designed to be the same as the edge portion of the light guide plate 151 or larger than the edge portion of the light guide plate 151 in order to eliminate light phenomena.

또한, 도광판(151)의 상부면에는 도광판(151)의 크기보다 작은 복수매의 시트류들(155)이 몰드프레임(130)과 소정간격 이격되어 설치되어 있으며, 몰드프레임(130)의 상부면에는 하부 기판인 TFT 기판(161)과 상부 기판인 칼라필터 기판(163)으로 구성되어 있으며 정보를 디스플레이 해주는 LCD 패널(160)이 설치된다. 여기서, 몰드프레임(130)에 시트류들(155) 및 LCD 패널(160)을 설치할 때는 LCD 패널(160)의 화면유효영역의 에지부분에서 빛샘 현상이 발생되는 것을 방지하기 위해서 LCD 모듈의 외관품질 검사 각도보다 시트류들(155)의 단부가 커야 한다.In addition, on the upper surface of the light guide plate 151, a plurality of sheets 155 smaller than the size of the light guide plate 151 is installed at a predetermined distance from the mold frame 130, and the upper surface of the mold frame 130 is provided. The LCD panel 160 is configured by the TFT substrate 161 which is a lower substrate and the color filter substrate 163 which is an upper substrate, and displays information. Here, when installing the sheets 155 and the LCD panel 160 in the mold frame 130, the appearance quality of the LCD module in order to prevent the light leakage phenomenon occurs in the edge portion of the screen effective area of the LCD panel 160 The ends of the sheets 155 should be larger than the inspection angle.

또한, 복수매의 시트류(155)중 램프 반사판(143)과 동일 평면에 있는 시트류(155)는 소정 면적 절취된 다음 램프 반사판(143)이 시트류들(155) 중 적어도 하나와 겹쳐지도록 한다.In addition, the sheets 155 in the same plane as the lamp reflecting plate 143 of the plurality of sheets 155 are cut off a predetermined area so that the lamp reflecting plate 143 overlaps at least one of the sheets 155. do.

이때 램프 반사판(143)은 화면유효영역까지 연장되어 화면 유효 영역에서의 빛샘을 방지하여 화면 유효영역에서의 휘도를 방지한다.At this time, the lamp reflector 143 extends to the screen effective area to prevent light leakage in the screen effective area to prevent luminance in the screen effective area.

이상에서 설명한 바와 같이 램프 반사판을 화면유효영역의 단부까지 연장하고 시트류와 연장된 램프 반사판을 겹치도록 하여 화면유효영역에서의 빛샘을 방지하여 균일한 휘도를 얻을 수 있는 효과가 있다.As described above, the lamp reflector extends to the end of the screen effective area and overlaps the sheets and the extended lamp reflector to prevent light leakage in the screen effective area, thereby obtaining uniform luminance.

도 1은 종래 LCD 모듈의 백라이트 어셈블리를 도시한 단면도.1 is a cross-sectional view showing a backlight assembly of a conventional LCD module.

도 2는 본 발명에 의한 LCD 모듈의 백라이트 어셈블리를 도시한 단면도.2 is a cross-sectional view showing a backlight assembly of the LCD module according to the present invention;

Claims (2)

몰드프레임과,Mold frame, 상기 몰드프레임에 고정되는 램프 및 상기 램프를 감싸는 램프 반사판을 포함하는 램프 어셈블리와,A lamp assembly including a lamp fixed to the mold frame and a lamp reflector surrounding the lamp; 상기 램프 어셈블리에 설치된 도광판과,A light guide plate installed on the lamp assembly; 상기 도광판의 하부면에 설치된 반사시트와,A reflection sheet provided on a lower surface of the light guide plate; 상기 도광판의 상부면에 설치되어 상기 도광판으로부터 안내된 광을 상기 TFT-LCD 패널에 전달하는 복수매의 시트류들을 포함하며,A plurality of sheets installed on an upper surface of the light guide plate to transfer light guided from the light guide plate to the TFT-LCD panel, 상기 램프 반사판은 상기 시트류와 마주하는 제1 단부와, 상기 반사시트와 마주하는 제2 단부를 가지며, 상기 제1 단부는 화면 유효 영역의 가장자리까지 확장되어 상기 시트류의 단부와 일부분이 겹치도록 설치되는 것을 특징으로 하는 LCD 모듈의 백라이트 어셈블리.The lamp reflector has a first end facing the sheet and a second end facing the reflective sheet, the first end extending to an edge of the screen effective area so that a portion overlaps with an end of the sheet. Backlight assembly of the LCD module, characterized in that the installation. 제1항에 있어서, 상기 램프 반사판의 제1 단부는 상기 복수매의 시트류 중 적어도 하나의 시트류와 겹치도록 하여 상기 화면 유효 영역 부분에서 빛샘을 차단하는 LCD 모듈의 백라이트 에셈블리.The backlight assembly of claim 1, wherein the first end of the lamp reflector is overlapped with at least one sheet of the plurality of sheets to block light leakage at a portion of the screen effective area.
KR1019980026895A 1998-07-03 1998-07-03 Backlight assembly of LCD module KR100544818B1 (en)

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KR100413486B1 (en) * 2001-07-10 2003-12-31 엘지.필립스 엘시디 주식회사 Backlight assembly of Liquid Cristal Display
KR20070066083A (en) * 2005-12-21 2007-06-27 엘지이노텍 주식회사 Liquid crystal display device and mobile station having the same
KR200449419Y1 (en) * 2008-09-08 2010-07-08 한솔엘씨디 주식회사 Side-mold having a reflection part

Citations (5)

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JPH06235822A (en) * 1993-02-09 1994-08-23 Sanyo Electric Co Ltd Liquid crystal display device
JPH07230004A (en) * 1993-12-21 1995-08-29 Mitsui Toatsu Chem Inc Light reflector for back light unit of liquid crystal display device
JPH07318934A (en) * 1994-05-20 1995-12-08 Hitachi Ltd Liquid crystal display device
KR960032349U (en) * 1995-03-30 1996-10-24 Backlight Structure of LCD
KR960042156A (en) * 1995-05-31 1996-12-21 김광호 Backlight device for liquid crystal display including integral reflection film

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06235822A (en) * 1993-02-09 1994-08-23 Sanyo Electric Co Ltd Liquid crystal display device
JPH07230004A (en) * 1993-12-21 1995-08-29 Mitsui Toatsu Chem Inc Light reflector for back light unit of liquid crystal display device
JPH07318934A (en) * 1994-05-20 1995-12-08 Hitachi Ltd Liquid crystal display device
KR960032349U (en) * 1995-03-30 1996-10-24 Backlight Structure of LCD
KR960042156A (en) * 1995-05-31 1996-12-21 김광호 Backlight device for liquid crystal display including integral reflection film

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