KR20000043518A - Back light assembly - Google Patents
Back light assembly Download PDFInfo
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- KR20000043518A KR20000043518A KR1019980059915A KR19980059915A KR20000043518A KR 20000043518 A KR20000043518 A KR 20000043518A KR 1019980059915 A KR1019980059915 A KR 1019980059915A KR 19980059915 A KR19980059915 A KR 19980059915A KR 20000043518 A KR20000043518 A KR 20000043518A
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- lamp
- light
- assembly
- lamp assembly
- diffusion
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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
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
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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
- F21V19/009—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 the support means engaging the vessel of the source
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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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Abstract
Description
본 발명은 백라이트 어셈블리에 관한 것으로, 더욱 상세하게는 램프와 마주보는 확산판의 하부면에 반사도트를 형성하거나, 램프와 대응되는 부분에 반원형상의 홈을 형성하여 램프에서 발산된 빛을 분산시킨 백라이트 어셈블리에 관한 것이다.The present invention relates to a backlight assembly, and more particularly, a backlight in which a reflection dot is formed on a lower surface of a diffuser plate facing a lamp, or a semicircular groove is formed in a portion corresponding to the lamp to disperse light emitted from the lamp. It is about assembly.
일반적으로 널리 사용되고 있는 표시장치들 중의 하나인 CRT(Cathode Ray Tube)는 TV를 비롯해서 계측기기, 정보 단말기기 등의 모니터에 주로 이용되고 있으나, CRT 자체의 무게와 크기로 인해 전자 제품의 소형화, 경량화의 요구에 적극 대응할 수 없었다.CRT (Cathode Ray Tube), one of the widely used display devices, is mainly used for monitors such as TVs, measuring devices, information terminal devices, etc., but due to the weight and size of the CRT itself, the miniaturization and weight reduction of electronic products Could not respond actively to the demands of.
이러한, CRT를 대체하기 위해 소형, 경량화 및 저소비전력의 장점을 갖고 있는 액정표시장치가 활발하게 개발되어 왔고, 최근에는 평판 표시장치로서의 역할을 충분히 수행할 수 있을 정도로 개발되어 랩탑형 컴퓨터의 모니터뿐만 아니라 데스크탑형 컴퓨터의 모니터와 30인치 이상의 옥외용 대형 모니터 및 벽걸이 TV로도 사용되고 있어 액정표시장치의 수요는 계속적으로 증가되고 있는 실정이다.In order to replace the CRT, a liquid crystal display device having advantages of small size, light weight, and low power consumption has been actively developed, and recently, it has been developed enough to perform a role as a flat panel display device. In addition, it is used as a monitor of a desktop computer, a large 30-inch outdoor monitor and a wall-mounted TV, and the demand for liquid crystal display devices is continuously increasing.
이와 같은 액정표시장치는 외부에서 들어오는 광의 양을 조절하여 화상을 표시하는 수광장치이기 때문에 LCD 패널에 광을 조사하기 위한 별도의 광원, 즉 백라이트 어셈블리가 반드시 필요하다.Since the liquid crystal display is a light receiving device that displays an image by controlling the amount of light coming from the outside, a separate light source, that is, a backlight assembly, for irradiating light to the LCD panel is necessary.
보통, 대화면 액정표시장치에서는 직하 방식으로 램프 어셈블리를 설치하는데, 이는 가스 봉입 문제 및 램프의 휨등으로 인해 예를 들어, 30인치 이상의 액정표시장치에 대응되는 음극선관 램프를 만들지 못하기 때문이다.In general, a large screen liquid crystal display device installs a lamp assembly in a direct manner, because, for example, a cathode ray tube lamp corresponding to a liquid crystal display device of 30 inches or more may not be manufactured due to gas encapsulation problem and lamp bending.
이와 같이, 직하 방식이 채택된 백라이트 어셈블리는 수납공간이 형성된 몰드프레임과, 수납공간의 기저면에 설치되는 램프 어셈블리와, 램프 어셈블리의 상부에 설치되어 램프 어셈블리에서 발산된 빛을 확산시키는 확산판과, 확산판의 상부에 설치되어 확산된 빛을 집광하는 광학 시트들로 구성된다.As such, the backlight assembly adopting the direct method includes a mold frame in which a storage space is formed, a lamp assembly installed on a bottom surface of the storage space, a diffuser plate installed on an upper portion of the lamp assembly, and diffusing light emitted from the lamp assembly; It is composed of optical sheets installed on top of the diffuser plate to collect the diffused light.
여기서, 램프 어셈블리는 다수개의 반원형상의 홈들이 확산판의 폭방향으로 형성된 램프 홀더와, 반원형상의 홈들에 안착되어 빛을 발산하는 냉음극관 램프들로 구성된다.Here, the lamp assembly is composed of a lamp holder in which a plurality of semicircular grooves are formed in the width direction of the diffusion plate, and cold cathode tube lamps which are mounted on the semicircular grooves and emit light.
대화면 액정표시장치에서 램프 어셈블리를 직하 방식으로 설치할 경우 LCD 패널에서 냉음극관 램프와 대응되는 부분은 밝아 보이고 냉음극관 램프가 설치되지 않은 부분은 상대적으로 어두워 보이므로 빛의 균일성이 저하된다.When the lamp assembly is directly installed in the large-screen liquid crystal display, the portion corresponding to the cold cathode tube lamp in the LCD panel is bright and the portion in which the cold cathode tube lamp is not installed is relatively dark.
따라서, 본 발명의 목적은 상기와 같은 문제점을 감안하여 안출된 것으로써, 램프에서 발산되는 빛의 양을 제어하여 액정표시장치의 빛 균일성을 향상시키는데 있다.Accordingly, an object of the present invention is to conceive in view of the above problems, to control the amount of light emitted from the lamp to improve the light uniformity 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.
도 1은 본 발명에 의한 액정표시장치를 개략적으로 도시한 단면도이고,1 is a cross-sectional view schematically showing a liquid crystal display device according to the present invention;
도 2는 본 발명의 제 1 실시예에 의한 확산판을 도시한 평면도이며,2 is a plan view showing a diffusion plate according to a first embodiment of the present invention,
도 3은 본 발명의 제 2 실시예에 의한 확산판을 도시한 단면도이다.3 is a cross-sectional view showing a diffusion plate according to a second embodiment of the present invention.
이와 같은 목적을 달성하기 위해서 본 발명은 램프 어셈블리에서 발산된 빛을 균일하게 확산시켜 LCD 패널의 빛 균일성을 향상시키기 위해서 램프 어셈블리와 대향되는 확산판의 하부면에 광조절부를 형성한다.In order to achieve the above object, the present invention forms a light control unit on the lower surface of the diffuser plate facing the lamp assembly to uniformly diffuse the light emitted from the lamp assembly to improve the light uniformity of the LCD panel.
일예로, 광조절부는 램프에서 발산된 빛을 확산시키는 확산도트들이며, 확산도트들은 램프의 중앙부분을 기준으로 램프의 중앙부분에는 크게 형성되고, 램프의 중앙부분에서 멀어질수록 작게 형성된다.For example, the light control units are diffusion dots that diffuse light emitted from the lamp, and the diffusion dots are formed in the central portion of the lamp with respect to the center portion of the lamp, and become smaller as the distance from the center portion of the lamp increases.
다른 예로, 광조절부는 램프와 대응되는 형상으로 형성된 오목 홈이다.As another example, the light control unit is a concave groove formed in a shape corresponding to the lamp.
이하, 본 발명에 의한 액정표시장치를 첨부된 도면 도 1 내지 도 3을 참조하여 설명하면 다음과 같다.Hereinafter, a liquid crystal display according to the present invention will be described with reference to FIGS. 1 to 3.
본 발명에 의한 액정표시장치는 도 1에 도시된 바와 같이 수납홈이 형성된 몰드프레임(110)과, 몰드프레임(110)의 기저면에 설치되어 빛을 발산하는 램프 어셈블리(120)와, 램프 어셈블리(120)의 상부면으로부터 소정간격 이격되도록 설치되어 램프 어셈블리(120)에서 발산된 빛을 확산하는 확산판(130)과, 확산판(130)의 상부에 설치되어 확산된 빛의 휘도를 상승시키는 광학 시트들(140)과, 광학 시트들(140)의 상부면에 설치되어 정보를 표시하는 LCD 패널(150)로 구성된다.As shown in FIG. 1, the liquid crystal display according to the present invention includes a mold frame 110 including a receiving groove, a lamp assembly 120 installed on a base surface of the mold frame 110 to emit light, and a lamp assembly ( Diffusion plate 130 is installed so as to be spaced apart from the upper surface of the 120 to diffuse the light emitted from the lamp assembly 120, and optics installed on the diffusion plate 130 to increase the brightness of the diffused light It consists of the sheets 140 and the LCD panel 150 installed on the upper surface of the optical sheets 140 to display information.
여기서, 램프 어셈블리(120)는 확산판(130)의 폭방향으로 반원형상의 램프 삽입홈들(124)이 다수개 형성된 베이스판(122)과, 램프 삽입홈(124)에 삽입되어 빛을 발산하는 복수개의 램프들, 예를 들어 냉음극관 램프들(126)과, 냉음극관 램프들(126) 사이에 설치되어 냉음극관 램프(126)와 확산판(130) 사이를 소정 높이만큼 이격시켜 냉음극관 램프(126)에서 발산된 빛을 충분히 확산시키는 스페이서(128)로 구성된다.Here, the lamp assembly 120 is inserted into the base plate 122 formed with a plurality of semicircular lamp insertion grooves 124 in the width direction of the diffusion plate 130 and the lamp insertion groove 124 to emit light. The cold cathode lamp is installed between the plurality of lamps, for example, the cold cathode lamps 126 and the cold cathode lamps 126 to be spaced apart from the cold cathode lamp 126 and the diffusion plate 130 by a predetermined height. It consists of a spacer 128 that sufficiently diffuses the light emitted at 126.
한편, 본 발명의 제 1 실시예에 따르면 냉음극관 램프(126)에서 발산된 빛을 고르게 분산시키기 위해서 냉음극관 램프(126)와 마주보는 확산판(130)의 하부면에 확산 도트(132)를 복수개의 열과 행으로 형성한다.Meanwhile, according to the first embodiment of the present invention, in order to evenly distribute the light emitted from the cold cathode tube lamp 126, the diffusion dot 132 is disposed on the lower surface of the diffuser plate 130 facing the cold cathode tube lamp 126. It is formed of a plurality of columns and rows.
이를 좀더 상세히 설명하면 도 2에 도시된 바와 같이 냉음극관 램프(126)의 중앙 부분과 대응되는 부분은 확산도트(132)를 크게 형성하고, 냉음극관 램프(126)의 중앙을 기준으로 냉음극관 램프(126)에서 멀어질수록 확산도트(132)를 작게 형성한다.More specifically, as shown in FIG. 2, the portion corresponding to the center portion of the cold cathode tube lamp 126 forms a diffusion dot 132 and the cold cathode tube lamp is based on the center of the cold cathode tube lamp 126. The further away from 126, the smaller the diffusion dot 132 is formed.
이와 같이, LCD 패널(150)에서 봤을 때 빛이 가장 밝은 냉음극관 램프(126)의 중앙부분에 확산도트(132)를 크게 형성하면, 확산도트(132)가 냉음극관 램프(126) 중앙부분에서 발산되는 빛을 충분히 확산하여 다른 부분의 빛 밝기와 동일하게 맞춰준다.As such, when the diffusion dot 132 is largely formed in the center portion of the cold cathode tube lamp 126 where the light is the brightest as seen from the LCD panel 150, the diffusion dot 132 is formed in the center portion of the cold cathode tube lamp 126. Diffuse the light emitted enough to match the brightness of the other parts.
본 발명의 다른 실시예에 따르면 도 3에 도시된 바와 같이 냉음극관 램프(126)와 대응되는 확산판(130)의 하부면을 냉음극관 램프(126)와 대응되는 형상의 오목 홈(135)을 형성하여 LCD 패널(150)로 전달되는 양을 조절한다.According to another exemplary embodiment of the present invention, as shown in FIG. 3, the lower surface of the diffuser plate 130 corresponding to the cold cathode tube lamp 126 may be provided with a concave groove 135 having a shape corresponding to the cold cathode tube lamp 126. Form and adjust the amount delivered to the LCD panel 150.
즉, 냉음극관 램프(126)와 대응되는 부분을 오목하게 형성할 경우 빛이 오목 홈(135)의 계면에서 확산되어 냉음극관 램프(126)의 중앙부분의 빛 밝기와 가장자리의 빛 밝기와 동일하게 된다.That is, when the portion corresponding to the cold cathode tube lamp 126 is formed concave, light is diffused at the interface of the concave groove 135 so that the light brightness of the center portion of the cold cathode tube lamp 126 and the light brightness of the edge are the same. do.
이와 같이, 냉음극관 램프(126)와 마주보는 확산판(130)의 하부면에 확산도트(132)를 형성하거나 오목 홈(135)을 형성할 경우 LCD 패널(150)에서 봤을 때 빛의 세가가 가장 센 냉음극관 램프(126)의 중앙부분의 빛이 충분히 확산되어 냉음극관 램프(126)의 가장자리부분에서 발산된 빛의 세기와 동일하게 조절된다.As such, when the diffusion dot 132 is formed on the lower surface of the diffusion plate 130 facing the cold cathode tube lamp 126 or the concave groove 135 is formed, the light of the light is viewed from the LCD panel 150. The light of the center portion of the cold cathode tube lamp 126 which is the strongest is sufficiently diffused and adjusted to be equal to the intensity of light emitted from the edge of the cold cathode tube lamp 126.
이상에서 설명한 바와 같이 본 발명은 램프와 마주보는 확산판의 하부면에 확산도트들을 형성하거나 또는 램프와 대응되는 부분에 오목한 홈을 형성하여 램프의 중앙부분에서 발산되는 빛을 충분히 확산시켜 램프의 중앙부분에서 발산되는 빛의 밝기와 램프의 가장자리에서 발산되는 빛의 밝기를 동일하게 조절한다.As described above, the present invention forms diffused dots on the lower surface of the diffuser plate facing the lamp, or forms a concave groove in a portion corresponding to the lamp to sufficiently diffuse the light emitted from the central portion of the lamp to Adjust the brightness of the light emitted from the part and the brightness of the light emitted from the edge of the lamp.
따라서, LCD 패널에서 램프와 대응되는 부분이 다른 부분보다 밝아 보이는 현상을 방지하여 빛의 균일성을 향상시킬 수 있는 효과가 있다.Therefore, there is an effect of improving the uniformity of the light by preventing the portion corresponding to the lamp in the LCD panel looks brighter than other portions.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980059915A KR100568018B1 (en) | 1998-12-29 | 1998-12-29 | Backlight assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980059915A KR100568018B1 (en) | 1998-12-29 | 1998-12-29 | Backlight assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000043518A true KR20000043518A (en) | 2000-07-15 |
| KR100568018B1 KR100568018B1 (en) | 2006-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019980059915A KR100568018B1 (en) | 1998-12-29 | 1998-12-29 | Backlight assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100731029B1 (en) * | 2000-12-07 | 2007-06-22 | 엘지.필립스 엘시디 주식회사 | Tile liquid crystal display device |
| KR100845558B1 (en) * | 2002-03-18 | 2008-07-10 | 삼성전자주식회사 | Liquid crystal display apparatus |
| US8057066B2 (en) | 2008-08-21 | 2011-11-15 | Samsung Electronics Co., Ltd. | Backlight assembly with improved brightness uniformity and display apparatus having the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05139098A (en) * | 1991-03-26 | 1993-06-08 | Masaki Kawasaki | Manufacture of product with inlaid pattern |
| KR930020200A (en) * | 1992-03-05 | 1993-10-19 | 김광호 | Display backlight unit |
| JP3205373B2 (en) * | 1992-03-12 | 2001-09-04 | 株式会社日立製作所 | Liquid crystal display |
| JPH06301034A (en) * | 1992-04-30 | 1994-10-28 | Riyoosan:Kk | Back light device and assembling method therefor |
| US5541751A (en) * | 1992-12-11 | 1996-07-30 | Sharp Kabushiki Kaisha | Light scan type display device having light waveguides and photo conductive switching elements |
| US5479328A (en) * | 1994-01-05 | 1995-12-26 | Interstate Electronics Corporation | High-brightness, high-efficacy backlight |
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1998
- 1998-12-29 KR KR1019980059915A patent/KR100568018B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100731029B1 (en) * | 2000-12-07 | 2007-06-22 | 엘지.필립스 엘시디 주식회사 | Tile liquid crystal display device |
| KR100845558B1 (en) * | 2002-03-18 | 2008-07-10 | 삼성전자주식회사 | Liquid crystal display apparatus |
| US8057066B2 (en) | 2008-08-21 | 2011-11-15 | Samsung Electronics Co., Ltd. | Backlight assembly with improved brightness uniformity and display apparatus having the same |
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| Publication number | Publication date |
|---|---|
| KR100568018B1 (en) | 2006-06-07 |
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