TWI293704B - - Google Patents
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- TWI293704B TWI293704B TW091102782A TW91102782A TWI293704B TW I293704 B TWI293704 B TW I293704B TW 091102782 A TW091102782 A TW 091102782A TW 91102782 A TW91102782 A TW 91102782A TW I293704 B TWI293704 B TW I293704B
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- light guide
- guide plate
- plane
- liquid crystal
- disposed
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Classifications
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- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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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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- 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
-
- 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
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- 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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/007—Incandescent lamp or gas discharge lamp
- G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
Landscapes
- 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)
Description
1293704 五、發明說明(1) 本發明係有關於一種應用於顯示器之背光裝置,特別 係有關於均勻發光的直下式背光裝置以及使用此直下式背 光裝置之液晶顯示器。 發明背景: 第1 A圖係顯示一種習知液晶顯示器的直下式背光裝置 的立體圖。如第1A圖所示,習知的直下式背光裝置1〇包括 一導光板(light guide plate)ll、一反射片(reflector) 12以及複數燈管13 ;其中,複數燈管13設置於反射片12與 導光板11之間。
如第1A圖所示,習知的直下式背光裝置為了獲得一均 勻發光照射於一液晶面板上。一般而言,導光板平面上與 燈管之最短距離處,容易產生最大發光亮度。進一步,隨 著複數燈管之排列變化,容易於導光板鄰近液晶面板之發 光平面上產生發光亮度變化,也就是明暗之條紋變化。 為了改善上述明暗之條紋變化,參考第1B圖,其係顯 示一種習知液晶顯示器的直下式背光裝置的截面圖。導光 板21鄰近液晶面板之發光平面25上,與燈管23相對應處形
成一遮光層24,藉由此遮光層遮蔽明暗條紋之明亮條紋。 然而’此方法將會減少通過液晶面板之光線數量;進一 步’減少液晶顯示器之光亮度。此外,再參考第1C圖,其 係顯示另一種習知液晶顯示器的直下式背光裝置的截面 圖。與燈管33對應位置處之反射片32形成V型,藉由V塑反 射片32反射來自燈管的光束’以便降低導光板31上明暗條 ’未藉由V型反射罩反射而直接照射導光 紋之差異。然而
0632-6956TWF;D90028;J aaper.ptd 第4頁 光時’藉由導光板之弧狀凹槽,將此等燈管之光束均勻分 1293704
^光束’仍然會在導光板鄰近液晶面板之發光平面35上 產生明暗條紋。 發明概要: 光I 鐘於此’為了解決上述的問題,本發明提出一種背 样:置’其中’複數燈管設置於導光板之的複數弧狀凹 ^於本發明中’藉由具有弧狀凹槽的導光板,將來自燈 &之光束均勻地自導光板鄰近液晶面板之發光平面擴★散。 本發明之一目的在於提供一種背光裝置,包括:一導 二,以及複數燈管;其中,導光板具有一第一平面與一第 面’且第一平面與第二平面彼此互相對立。本發明之 光板於第一平面上更包括複數弧狀凹槽,且上述燈管設 置於弧狀凹槽。當複數燈管發光時,藉由導光板之弧狀凹 槽’將此等燈管之光束均勻分佈地自導光板發射。 •本發明之另一目的在於提供一種液晶顯示器,其包 括·一液晶面板、一擴散構件、一導光板、複數燈管以及 厂反射罩;其中,導光板具有一第一平面與一第二平面, 彼此對立地設置。本發明於導光板之第一平面上更包括複 數弧狀凹槽,且上述燈管設置於弧狀凹槽。當複數燈管發 佈地自導光板發射。 本發明之優點在於,藉由具有弧狀凹槽的導光板,將 來自燈管之光束均勻地自導光板鄰近液晶面板之發光平面 擴散。 圖示簡單說明:
0632-6956TWF;D90028;J aape r.ptd 第5頁 1293704 五、發明說明(3) 為讓本發明之上述目的、特徵、和優點能更明顯易 懂,下文特舉一實施例,並配合附加圖式,作詳細說明如 下: 第1A圖係顯示一種習知液晶顯示器的背光裝置的立體 圖, 第1 B圖係顯示另一種習知液晶顯示器的背光裝置的截 面圖; 第1C圖係顯示再一種習知液晶顯示器的背光裝置 面圖; 、、戳 第2圖係概要地顯示本發明背光裝置之立體圖; 第3圖係概要地顯示具有弧狀凹槽之導光板具 鏡之功能; "^ 第4圖係概要地顯示使用本發明背光裝置之液晶顯,一、 器。 日日”不 符號說明 10、 20、30〜背光裝置; 11、 21、31〜導光板; 25、35〜導光板平面; 12、 22、32〜反射片; 1 3、23、33〜燈管; 24〜遮光層; 100〜背光裝置; 110、 210〜導光板; 111、 211〜第一平面;
1293704 五、發明說明(4) 112、 21 2〜第二平面; 113、 213〜弧狀凹槽; 120、22 0〜反射片; 130、23 0〜燈管; 200〜液晶顯示器; 24 0〜擴散構件; 241〜霧化薄板; 242〜稜鏡薄板; 243〜保護薄膜; 250〜液晶面板。 實施例說明: 第2圖係顯不本發明背光裝置之截面圖。如第2圖所 不’本發明之背光裝置100包括一導光板11〇、一反射片 120以及複數燈管130。導光板110具平面m -第二平面112,且第一平面⑴與第有二平第面丄此互;目及 對立。複數個燈官130設置於導光板11()與反射片12〇之 間,反射片1 2 0係相對於導光板之第一平面丨丨^。 本發明之背光裝置100於第一平面ηι上設有複數個弧 狀凹槽113 ’且弧狀凹槽113之數目不少於燈管之數 目。每一燈管130設置於對應的弧狀凹槽113與反射片12〇 之間。當燈管1 3 0發光時,來自燈光之光束直接照射弧狀 凹槽或藉由反射片反射後照射弧狀凹槽。參考第3圖,每 一燈管130對應的弧狀凹槽113可視為一凹透鏡。根據造鏡 者公式,來自燈管130之光束藉由導光板n〇中的弧狀凹槽
1293704 五、發明說明(5) 113產生擴散作用。因此,來自燈管130之光束可自導光板 110之第二平面112均勻地發射。 第4圖係概要地顯示一個使用本發明背光裝置之液晶 顯示器。如第4圖所示,液晶顯示器200包括:一液晶面板 250、一導光板210、一反射片22 0以及複數個燈管2 30。且 於液晶面板2 50與導光板210之間設置一擴散構件 (diffusing means)240。導光板 210 具有一第一平面 211 以 及一第二平面212 ;且第一平面211與第二平面212彼此互 相對立。複數個燈管230設置於導光板210與反射片220之 間’反射片220係相對於導光板之第一平面211。 如第4圖所示,導光板2 1〇於第一平面2Π上設有複數 個弧狀凹槽213,且弧狀凹槽213之數目不少於燈管230之 數目。當燈管23 0發光時,來自燈管23 0之光束直接照射弧 狀凹槽213或藉由反射片220反射後進入弧狀凹槽213。參 考第3圖,每一燈管230對應的弧狀凹槽213係一凹透鏡。 根據造鏡者公式,來自燈管230之光束藉由導光板2 1〇中的 弧狀凹槽213產生擴散作用。因此,來自燈管230之光束可 自導光板210之第二平面212均勻地發射。 接著’如第4圖所示,自導光板21〇之第二平面212均 勻發射的光束通過擴散構件240後,均勻地照射於液晶面 板250。最後’光線可從液晶面板25〇中均勻發射。 於本發明中,擴散構件240設置於導光板210之第二平 面212上’其中包括一霧化薄板(diffusing sheet)241、 稜鏡薄板(prism sheet)242及一保護薄膜(protecting
IHB 0632-6956TWF;D90028;J aape r.ptd 第8頁 1293704 五'發明說明(6) ---— fnm)243。保護薄膜243與導先板210之第二平面211仳 "又置’且霧化薄板2 41與液晶面板2 5 〇他鄰設置。最接 晶面板25。設置於擴散構件24。上,形成一液晶顯液 2 0 0 〇 、,然本發明已以一較佳實施例揭露如上,然其並非用 =限,本發明’任何熟習此技藝者,在不脫離本發明之精 ^和範圍’當可作些許之更動與潤飾,因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。
Claims (1)
- 六、 申請專利範圍 1· 一種背光裝置,包括: 一導光板,具有彼此互相對立的一第一平面與一第二 平面; 一反射片,與上述導光板之第一平面相對;以及 複數個燈管,設置於導光板與反射片之間; 其中,上述導光板更包含複數個弧狀凹槽,形成於該 導光板之第一平面上’並且每一燈管設置於對應的弧狀凹 槽與反射片之間; 當燈管發光時,來自燈管之光束直接照射弧狀凹槽或 藉由反射片反射後照射弧狀凹槽,接著藉由該導光板均勻¥ 地擴散光束。 2·如申請專利範圍第1項所述的背光裝置,其中上述 弧狀凹槽之數目等於上述燈管之數目。 3 · —種液晶顯示器,其包括: 一液晶面板; 一導光板,上述導光板具有彼此互相對立的一第一平 面與一第二平面; 一反射片與上述導光板之第一平面相對;以及 複數個燈管,設置於上述導光板與反射片之間, 其中,上述導光板更包括複數弧狀凹槽,形成於該導 光板之第一平面上,並且每一燈管設置於對應的弧狀凹槽 與反射片之間; 當燈官發光時’來自燈光之光束直接照射弧狀凹槽或 藉由反射片反射後照射弧狀凹槽,藉由該導光板均勻地擴0632-6956TWF;D90028;J aape r.p t d 第10頁 1293704 六、申請專利範圍 散光束且照射於上述液晶面板上。 4 ·如申請專利範圍第3項所述的液晶顯示器 一擴散構件,設置於上述液晶面板與導光板之間 5 ·如申請專利範圍第4項戶斤述的液晶顯示器 述擴散構件依序包括一保護薄膜、一稜鏡薄板、 板,其中上述保護薄膜設置於上述導光板之上。 6 ·如申請專利範圍第3項所述的液晶顯示器 述弧狀凹槽之數目不少於上述燈管之數目。 更包括 > 其中上 -霧化薄 其中上0632-6956TWF;D90028;J aape r.p t d 第11頁
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TW091102782A TWI293704B (zh) | 2002-02-19 | 2002-02-19 | |
US10/370,123 US6867829B2 (en) | 2002-02-19 | 2003-02-18 | Back light device and a liquid crystal display applying thereof |
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TW091102782A TWI293704B (zh) | 2002-02-19 | 2002-02-19 |
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Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100931501B1 (ko) * | 2002-12-27 | 2009-12-11 | 엘지디스플레이 주식회사 | 액정표시모듈 및 그 조립 방법 |
US20050088587A1 (en) * | 2003-10-27 | 2005-04-28 | Pan John C. | Direct-light illuminating backlight unit with a reflective structure for a liquid crystal display |
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FR2471012A1 (fr) * | 1979-12-07 | 1981-06-12 | Commissariat Energie Atomique | Dispositif d'eclairage pour grand ecran |
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KR100450542B1 (ko) * | 1998-10-29 | 2004-10-01 | 가부시키가이샤 히타치세이사쿠쇼 | 조명 장치 및 이를 이용한 액정 표시 장치 |
-
2002
- 2002-02-19 TW TW091102782A patent/TWI293704B/zh not_active IP Right Cessation
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2003
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US20030156234A1 (en) | 2003-08-21 |
US6867829B2 (en) | 2005-03-15 |
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