CN101828271A - 具有磷光体波长转换的发光装置 - Google Patents
具有磷光体波长转换的发光装置 Download PDFInfo
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- CN101828271A CN101828271A CN200880111717A CN200880111717A CN101828271A CN 101828271 A CN101828271 A CN 101828271A CN 200880111717 A CN200880111717 A CN 200880111717A CN 200880111717 A CN200880111717 A CN 200880111717A CN 101828271 A CN101828271 A CN 101828271A
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/12—Combinations of only three kinds of elements
- F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
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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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/10—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings
- F21V3/12—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by coatings the coatings comprising photoluminescent substances
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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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
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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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/38—Combination of two or more photoluminescent elements of different materials
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
- F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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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
- 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
- G02B6/0073—Light emitting diode [LED]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
- Luminescent Compositions (AREA)
- Optical Filters (AREA)
Abstract
本发明涉及一种发光装置,其包括:激发源,即可操作以产生第一波长范围的激发光的一个或一个以上发光二极管;及发光表面,其具有吸收所述激发光的至少一部分且发射第二波长范围的光的磷光体材料,其中所述装置所发射的光包括所述发光表面所发射的所述第一与第二波长范围的组合光。所述装置的特征在于所述发光表面具有不包含磷光体材料且对所述第一及第二波长的光大致透明的一个或一个以上窗口区域。所述发光表面可包括透明衬底,所述透明衬底在其表面上具有磷光体材料图案,其中所述一个或一个以上窗口区域均匀地分布在所述发光表面上方。
Description
优先权主张
由李一群(Yi-Qun Li)发明于2007年10月17日提出申请的第11/975,130号美国专利申请案,其名称为“具有磷光体波长转换的发光装置”(LIGHT EMITTINGDEVICE WITH PHOSPHOR WAVELENGTH CONVERSION)(代理档案号ITMX-00225US0)。
技术领域
本发明涉及具有磷光体波长转换的发光装置。更具体来说,本实施例针对具有磷光体光致发光波长转换以产生所期望色彩及/或色温的光的基于发光二极管的照明系统。
背景技术
固态半导体装置(特定来说发光二极管(LED))的开发已开启新一代高能效照明系统的可能性。直到已开发出在电磁光谱的蓝色/紫外线部分中发光的LED,开发基于LED的白色光源(“白色LED”)才变得实际。
举例来说,如US 5,998,925中所教示,白色LED包含一种或一种以上磷光体材料(即光致发光材料),所述磷光体材料吸收所述LED芯片所发射的辐射的一部分并重新发射不同色彩(波长)的光。通常,LED芯片或裸片产生蓝色光,且所述一种或多种磷光体吸收一定百分比的蓝色光并重新发射黄色光或绿色光与红色光、绿色光与黄色光或黄色光与红色光的组合。所述LED所产生的蓝色光的不为所述磷光体吸收的部分(即,被所述磷光体透射的部分)与所述磷光体所发射的光组合并提供在人眼看来在色彩上近似为白色的光。磷光体层通常(举例来说)被设置在邻近或紧接近自其获得其激发能量的LED裸片/芯片发光表面处。经常,将磷光体层直接涂布在LED裸片上以实现照明效果的所需强度及色彩。
如已知,白色光源的相关色温(CCT)是通过将其色调与理论上、经加热的黑体辐射体相比较来确定。CCT是以开尔文温标(K)规定且对应于与所述光源辐射相同的白色光色调的黑体辐射体的温度。一般来说,白色LED的CCT是由磷光体组成及并入所述LED中的磷光体的数量来确定。
当今,利用LED的大多数照明器具设计包括其中LED(更一般来说用以实现所产生的光的所需强度的LED阵列)替代常规系统组件(例如白炽灯泡、汞汽灯及紧凑型荧光灯)的系统。在照明系统旨在产生白色光照明效果的情况中,LED可包括红色、绿色及蓝色直接光产生LED(即不包含波长转换磷光体材料的LED)阵列或最近的白色LED阵列。
如在US 6,350,041、WO 2004/100226及我们的同在申请中的美国专利申请案11/827,890及11/714,484中所揭示,磷光体材料可提供于其相关联激发源的远处。
US 6,350,041教示发射用于室内照明及其它应用的辐射状分散光的基于LED的固态灯。所述灯包括固态光源(例如LED或激光器),其使光透射穿过分离器到达分散器,所述分散器按所需模式分散光及/或改变光色彩。在一个实施例中,光源包括发蓝色光的LED,分离器是光管或光纤装置且分散器以辐射状分散所述光且将一些蓝色光转换成黄色以产生白色光照明效果。分离器将LED与分散器分隔充分距离以使得当LED以用于室内照明所需的升高电流操作时来自所述LED的热将不会转移到分散器。此类灯可按众多模式分散光,但其尤其适合于用于室内照明的白色光的辐射状分散,从而使所述灯能够用作现有照明工具及照明器具中的替代光源。
2007年7月13日提出申请、序列号为11/827,890的我们的同在申请中的美国专利申请案教示其中磷光体材料位于其相关联激发源(LED)的远处的LED发光/照明系统/器具或照明工具。经由波导介质将LED所产生的光运送到磷光体材料且向一个或多个磷光体及/或磷光体层提供激发辐射,从而致使光致发光。来自所述一种或多种磷光体的光可构成最终照明效果,或其可与来自激发源的任何可见光组合在一起(举例来说,此可发生在蓝色LED作为激发源的情况中)。所述最终照明效果可以是白色光或任何彩色光。波导管可经配置以呈照明系统的形状,例如悬吊发光器具、桌上照明器具、立式照明器具、台灯、活动式投射灯照明、点照明、重点照明或用于并入悬挂式天花板中的照明面板。在照明面板配置中,光导在形式上为大致平面且具有提供于所述光导的整个发光面上方的磷光体。由多个LED产生的激发辐射耦合到光导的一个或一个以上边缘(例如)以大致贯穿光导传播且然后穿过发光面发射,在所述发光面处至少一部分所述激发辐射激发磷光体使其发射第二波长的光。为防止光通过面板的背面损失,在光导的背面(即,与发光面相对的面)上提供反射层。
2007年5月3日提出申请、序列号为11/714,464的美国专利申请案教示其中在位于激发源(LED)的远处的遮光罩上提供磷光体的照明器具及系统。遮光罩(光罩壳)经配置以至少部分地围绕LED以使得激发辐射从激发源到遮光罩进行(即在自由空间(即,其并未被光介质所引导)传播)至少一个厘米的距离。磷光体可提供在所述遮光罩的内表面或外表面上或并入所述遮光罩材料内。在一个实施例中,照明系统包括舱壁灯(其包括含有一个或一个以上LED的外壳)且遮光罩包括覆盖外壳开口的前窗口。由不透明材料制成的外壳包含反射内表面以用于将光朝向遮光罩反射。
WO 2004/100228揭示LED面板灯,其包括藏纳多个发UV光LED的罩壳及含有一种或一种以上UV可激发磷光体材料的可移除前发光面板。由于磷光体材料产生沿所有方向同等辐射(各向同性)的光,一些磷光体产生的光将被向后引导到罩壳中。为防止此类光进入罩壳且损失掉,前面板在其内表面上包含涂层,所述涂层对于LED的波长为透射而对于所述一种或多种磷光体所产生的波长为反射。而且,为防止非经转换UV光泄露,前面板可在其外表面上包含第二涂层,所述第二涂层对于UV光为反射且对于由所述一种或多种磷光体产生的光为透射。所述文档还描述类似于标准白炽灯泡的照明系统,其中一种或一种以上磷光体材料包含在灯泡包壳的内表面上。
虽然此类照明系统设计可已经证明可为一些消费者接受的特性-例如强度、色温及色彩感觉等特性-但仍需要基于固态组件的更高效率的照明系统。
发明内容
本发明致力于提供具有磷光体波长转换的发光装置,其至少部分地克服已知装置的局限性。本发明的实施例针对包括以下各项的发光装置:激发源,其可以(举例来说)为LED或激光器二极管;及发光表面,其包含一种或一种以上磷光体光致发光材料。来自激发源的光为所述一种或多种磷光体提供激发辐射,从而致使光致发光。由磷光体产生的光与来自激发源的光组合构成所述装置的照明效果。与已知装置不同,发光区域进一步包括一个或一个以上区域(一个或多个窗口),其不包含磷光体材料且其对磷光体所产生的光及激发源所产生的光两者大致透明。此类窗口通过最大化装置所发射的光而改进装置的效率。
根据本发明,一种发光装置包括:至少一个激发源,例如可操作以产生第一波长范围的激发光的一个或一个以上发蓝色光二极管;及发光表面,其具有吸收所述激发光的至少一部分且发射第二波长范围的光的至少一种磷光体材料,其中所述装置所发射的光包括所述发光表面所发射的所述第一与第二波长范围的组合光,所述装置的特征在于所述发光表面具有不包含所述至少一种磷光体材料的至少一个窗口区域,所述窗口区域对所述第一及第二波长的光大致透明。
所述发光表面优选地包括透明衬底(例如,丙烯酸系树脂、聚碳酸酯、聚乙烯或玻璃材料),其对第一及第二波长的光大致透明且其在其表面上具有至少一种磷光体材料。所述磷光体材料可包括磷光体区(岛)阵列(图案),其中所述磷光体区之间的间隙界定至少一个窗口区域。为确保所发射的光的均匀色彩及/或色温,磷光体区的图案(优选地大致均匀地)分布在发光表面的大致整个区域上方。在其中磷光体区阵列包括正方形磷光体区的规则阵列的一个此类布置中,窗口区域在形式上将类似栅格且分布在发光表面上方。磷光体区可(举例来说)为大致多边形、正方形、圆形、椭圆形、三角形或矩形形状。相反地,磷光体材料可覆盖整个发光表面且包含窗口区域阵列。为确保所发射的光的均匀色彩及/或色温,窗口区域区的图案(优选地大致均匀地)分布在发光表面的大致整个区域上方。与磷光体区相同,窗口区域(举例来说)可大致为多边形、正方形、圆形、椭圆形、三角形或矩形形状。磷光体区及/或窗口区域的阵列可为规则或不规则图案。
可将衬底配置为激发光及磷光体所产生的光可穿过的光学组件。另一选择为,所述衬底可被配置为波导(光导)介质且激发源经配置以将激发光耦合到所述衬底中。在一个此类布置中,所述衬底在形式上为大致平面且激发光被耦合到所述衬底的一个边缘的至少一部分中。优选地,所述装置在所述衬底的与发光表面相对的表面的至少一部分上进一步包括反射器以帮助确保大致所有光从发光表面发射。为促成光从发光表面的发射,衬底的发光表面可包含例如表面图案化的表面拓扑结构。所述表面拓扑结构可通过激光或机械划线衬底表面、模制所述衬底以包含所述表面拓扑结构或使表面变粗糙来界定。所述衬底可包括其它波导形式(例如,形式上为细长或圆柱形),其中发光表面为所述波导的大致平坦面或弯曲表面。
在需要产生特定色彩及/或CCT的光的情况下,发光表面优选地包括至少两种不同磷光体材料的图案。所述磷光体组成、磷光体材料的密度及磷光体材料与一个或多个窗口区域的相对总面积可用于控制所发射的光的色彩及/或CCT。
对于旨在产生具有高CRI(显色指数)的白色光的发光装置,所述装置可进一步包括一个或一个以上LED,其可操作以产生给所述装置通过发光表面所发射的光作贡献的第三波长范围的光。在一个布置中,蓝色LED用于激发发绿色光的磷光体材料且橙色或红色LED用于产生最终发射效果的橙色或红色光分量,应了解,在此类布置中,发射效果包括红色(R)、绿色(G)及蓝色(B)色彩分量。优选地,蓝色LED对橙色或红色LED芯片的比率大致为2∶1以确保绿色光贡献足够实现所需CRI。将了解,在此类布置中,橙色或红色LED所产生的光不导致磷光体的激发且此类光经发射穿过发光磷光体表面中的一个或一个以上窗口区域。在替代布置中,蓝色LED可用于激发发橙色或红色光的磷光体且一个或一个以上发绿色光的LED芯片可用于给发射效果贡献绿色光。
所述磷光体材料可包括:基于硅酸盐的磷光体;基于铝酸盐的磷光体;基于氮化物的磷光体材料;基于硫酸盐的磷光体材料;基于含氧氮化物的磷光体;基于含氧硫酸盐的磷光体;石榴石材料;一般组成为A3Si(OD)5的基于硅酸盐的磷光体,其中Si为硅,O为氧,A包括锶(Sr)、钡(Ba)、镁(Mg)或钙(Ca)且D包括氯(Cl)、氟(F)、氮(N)或硫(S);一般组成为A2Si(OD)4的基于硅酸盐的磷光体5,其中A包括Sr、Ba、Mg或Ca且D包括Cl、F、N或S;或具有式M1-xEuxAlyO[1+3y/2]的基于铝酸盐的磷光体,其中M为包括Ba、Sr、Ca、Mg、Mn、Zn、Cu、Cd、Sm或铥(Tm)的二价金属中的至少一者。
根据本发明的进一步方面,一种发光装置包括:罩壳,其具有反射内表面;至少一个激发源,其藏纳于所述罩壳内且可操作以产生第一波长范围的激发光;及发光表面,其覆盖所述罩壳的开口且具有至少一种磷光体材料,所述至少一种磷光体材料吸收所述激发光的至少一部分且发射第二波长范围的光,其中所述装置发射的光包括所述发光表面所发射的所述第一与第二波长范围的组合光,所述装置的特征在于所述发光表面具有不包含所述至少一种磷光体材料的至少一个区域,所述区域对所述第一及第二波长的光大致透明,借此允许激发光的一部分及经反射的磷光体所产生的光穿过所述发光表面。
附图说明
为更好地理解本发明,现将参照附图仅以实例描述本发明的实施例,附图中:
图1是根据本发明的背光照明面板的部分分解透视示意图;
图2是图1的背光照明面板沿平面AA的横截面示意图;
图3是根据本发明实施例的用在图1及2的照明面板中的发光磷光体面板;
图4a及4b是根据本发明进一步实施例的发光磷光体面板;
图5是根据本发明的边缘发光照明面板的部分分解透视示意图;
图6a是图5的边缘发光照明面板的横截面示意图;
图6b是根据本发明进一步方面的边缘发光照明面板的横截面示意图;
图7是根据本发明的反光灯的部分剖视透视图;
图8是根据本发明的灯泡的部分剖视透视图;且
图9是根据本发明的管灯的部分剖视透视示意图。
具体实施方式
图1及2分别是根据本发明的发白色光的照明面板10的透视及横截面示意图。照明面板10打算用于一类通常用于办公室及商业场所中的悬挂式(垂吊)天花板中,其中支撑构件(T杆)栅格通过缆线悬挂在天花板上,且天花板板块/照明面板是由所述支撑构件栅格支撑。通常,所述天花板板块是正方形形状(2英尺x2英尺、60厘米x60厘米)或矩形形状(4英尺x2英尺、120厘米x60厘米)且本发明的照明面板经配置以装配在此类孔径内。
照明面板10包括背面发光单元12及发光磷光体面板14。背面发光单元12包括灯箱16,其由(例如)板形金属制造、从塑料材料模制或从任何其它适合材料构造而成。为最大化自照明面板的光发射,灯箱16的内表面18优选地包括光反射表面以将光朝向发光面板14反射。发光二极管(LED)20阵列提供于灯箱16内。每一LED 20可操作以产生波长λ1的光22,且每一者优选地包括产生波长400到480纳米的蓝色光的基于InGaN/GaN(氮化铟镓/氮化镓)的LED芯片。图解说明9个LED芯片20的正方形阵列,但应了解,可修改LED的数目及布局以适合所需应用。如将描述,LED20所产生的光22提供两个功能;第一,其包括最终照明效果32的一部分且第二,其提供用于激发磷光体面板14的磷光体材料的激发辐射。鉴于后一功能,后文将光22称为激发光。
发光磷光体面板14包括透明衬底24,例如(举例来说丙烯酸系树脂板),其具有提供于下表面(即,衬底的面向LED的表面)上的磷光体材料层(光致发光材料)26。在其它布置中,透明衬底24可包括其它透明材料,例如(举例来说)聚碳酸酯、聚乙烯或玻璃。磷光体材料26可包括任何能够被激发光22激发的光致发光材料,例如(举例来说)基于硅酸盐、正硅酸盐、氮化物、含氧氮化物、硫酸盐、含氧硫酸盐、石榴石或铝酸盐的磷光体材料。在优选实施例中,磷光体材料是一般组成A3Si(OD)5或A2Si(OD)4的基于硅酸盐的磷光体,其中Si为硅,O为氧,A包括锶(Sr)、钡(Ba)、镁(Mg)或钙(Ca),且D包括氯(Cl)、氟(F)、氮(N)或硫(S)。在2007年4月9日提出申请的我们的同在申请中的30专利申请案US2006/0145123、US2006/028122、US2006/281309、US2007029526及11/786,044中揭示基于硅酸盐的磷光体的实例,所述专利申请案中的每一者的内容借此以引用的方式并入本文中。
如US2006/0145123中所教示,铕(Eu2+)激活的基于硅酸盐的绿色磷光体具有通式(Sr,A1)x(Si,A2)(O,A3)2+x:Eu2+,其中:A1是2+阳离子、1+及3+阳离子的组合中的至少一者,例如(举例来说)Mg、Ca、Ba、锌(Zn)、钠(Na)、锂(Li)、铋(Bi)、钇(Y)或铈(Ce);A2是3+、4+或5+阳离子,例如(举例来说)硼(B)、铝(Al)、镓(Ga)、碳(C)、锗(Ge)、N或磷(P);且A3是1-、2-或3-阴离子,例如(举例来说)F、Cl、溴(Br)、N或S。写出所述式以指示A1阳离子替代Sr;A2阳离子替代Si且A3阴离子替代O。x的值是2.5与3.5之间的整数或非整数。
US2006/028122揭示具有式A2SiO4:Eu2+D的基于硅酸盐的黄绿色磷光体,其中A是包括Sr、Ca、Ba、Mg、Zn或镉(Cd)的二价金属中的至少一者;且D是包括F、Cl、Br、碘(I)、P、S及N的掺杂剂。掺杂剂D可以介于约0.01与20莫尔百分比之间的量存在于磷光体中。所述磷光体可包括(Sr1-x-yBaxMy)SiO4:Eu2+F,其中M包括Ca、Mg、Zn或Cd。
U52006/261309教示两相基于硅酸盐的磷光体,其具有其晶体结构与(M1)2SiO4的晶体结构大致相同的第一相;及其晶体结构与(M2)3SiO5的晶体结构大致相同的第二相,其中M1及M2各自包括Sr、Ba、Mg、Ca或Zn。至少一个相是由二价铕(Eu2+)激活且所述相中的至少一者含有包括F、Cl、Br、S或N的掺杂剂D。相信,至少一些所述掺杂剂原子位于主体硅酸盐晶体的氧原子晶格位点上。
US2007/029526揭示具有式(Sr1-xMx)yEuzSiO5的基于硅酸盐的橙色磷光体,其中M是包括Ba、Mg、Ca或Zn的二价金属中的至少一者;0<x<0.5;2.6<y<3.3;且0.001<z<0.5。所述磷光体经配置以发射具有大于约585纳米的峰值发射波长的可见光。
11/786,044教示通式为(A1A2)3(SiB1)(OC1)5的橙红色磷光体,其中A1及A2各自包括Sr、Ba、Mg、Ca、Zn、Y、镧(La)、镨(Pr)、钐(Sm)或Bi,B1包括Al、B、P或Ge且C1包括F、Cl、Br、S或N。
所述磷光体也可包括例如我们的同在申请中的专利申请案US2006/0158090及US2006/0027786中所教示的基于铝酸盐的材料,所述专利申请案中的每一者的内容借此以引用方式并入本文中。
US2006/0158090教示具有式M1-xEuxAlyO[1+3y/2]的基于铝酸盐的绿色磷光体,其中M是包括Ba、Sr、Ca、Mg、Mn、Zn、Cu、Cd、Sm及铥(Tm)的二价金属中的至少一者,且其中0.1<x<0.9且0.5≤y≤12。
US2006/0027786揭示具有式为(M1-xEux)2-zMg2AlyO[1+3y/2]的基于铝酸盐的磷光体,其中M是Ba或Sr的二价金属中的至少一者。在一种组成中,磷光体经配置以吸收介于约280纳米到420纳米之间的波长中的辐射,且发射具有介于约420纳米到560纳米之间的波长的可见光且0.05<x<0.5或0.2<x<0.5;3≤y≤12且0.8≤z≤12。所述磷光体可进一步掺杂有卤素掺杂剂H,例如Cl、Br或I且具有一般组成(M1-xEux)2-zMg2AlyO[1+3y/2]:H 。
应了解,所述磷光体并不限于本文中所描述的实例且可包括任一无机磷光体材料,包含例如氮化物及硫酸盐磷光体材料、含氧氮化物及含氧硫酸盐磷光体或石榴石材料。
图3是发光磷光体面板14的平面图。在所图解说明的实施例中,磷光体层26包括在所述面板的整个表面上方的均匀磷光体材料层且具有圆形区域28的规则阵列(图案),所述圆形区域不包含磷光体材料。圆形区域28组成发光磷光体面板14内的窗口或孔径的阵列或图案。发光磷光体面板14可通过将磷光体材料及粘合剂(例如,NAZDAR的透明丝网油墨9700)的混合物丝网印刷到透明衬底24的表面上来制造。将了解,磷光体图案可通过其它沉积方法产生,例如溅射、喷墨印刷等。为保护磷光体图案26,可将面板14安装到背面发光单元12,其中磷光体图案26面向LED 20。在其它布置中,发光磷光体面板可进一步包含在磷光体层上方的透明保护层或膜(未显示)。
图1及2的照明面板10经配置以产生具有≈7000K的相关色温的冷白色(CW)光且磷光体材料26可包括(例如)产生波长λ2≈500到540纳米的光的基于硅酸盐的发绿色光磷光体材料、产生波长λ2≈540到580纳米的光的基于石榴石或硅酸盐的发黄色光磷光体、基于硅酸盐的发绿色及橙色光磷光体的混合物或基于硅酸盐的发绿色光及基于氮化物的发红色光磷光体的混合物。在操作中,LED 20所发射的激发光22辐照发光磷光体面板14。磷光体材料26吸收一定百分比的激发光22,从而致使激发磷光体使其重新发射波长λ2的绿色光30。从面板的上部面(发光表面)34发射的光32(其构成最终照明效果)是由磷光体产生的绿色光(λ2)与未被磷光体吸收的蓝色激发光(λ1)的组合,且此在人眼看来在色彩上为白色。磷光体吸收的蓝色激发光22的百分比将相依于每单位面积磷光体材料的密度及磷光体层26的厚度。由于磷光体发光的各向同性性质,因此此暗指磷光体将其辐射的约50%沿返回到照明面板的方向发射。此类光将被灯箱的反射内表面18朝向面板的发光表面34反射回来。由于窗口28对由LED发射的光(λ1)及由磷光体产生的光(λ2)透明,所以所述窗口允许蓝色及绿色两种光从照明面板发射。本发明发光装置的优点是增强光输出且因此相比于已知布置改进效率。本发明的进一步优点是由于与并入磷光体的LED相比,磷光体材料提供于相对大的区域上方,因此此防止磷光体材料的热降级。
图4a及4b是根据本发明进一步实施例的发光磷光体面板14。在这些实施例中,磷光体包括两种不同磷光体材料的图案。对于将要产生选定CCT的白色光的照明面板来说,磷光体材料可包括(例如)基于硅酸盐的绿色(≈500到540纳米)及橙色(≈575到610纳米)发射磷光体。在优选的布置中,磷光体面板包括发绿色及红色光的磷光体的图案。
在图4a中,磷光体图案包括间隔开的交替磷光体材料正方形区的规则(正方形)阵列,其中绿色磷光体区40由实心正方形指示且橙色磷光体区由交叉阴影正方形42指示。位于磷光体材料的正方形岛之间的所有区域(即,不含有磷光体材料的区域)构成窗口28,其在形式上为类似栅格且均匀地分布在面板的整个表面区域上方。可通过混合粉末状磷光体材料与透明丝网油墨或透明涂料来丝网印刷磷光体图案。通常,磷光体在所沉积的材料中的重量加载量在10%与30%之间,但其也可相依于所需照明效果介于1%与99%之间。为沉积每单位面积充分密度的磷光体材料,例如≈0.02到0.04g/cm2,进行多遍(4到12遍)印刷可为必要的,遍数相依于印刷丝网的网眼大小。图4a的磷光体图案的优点是:由于磷光体区间隔开,所以此防止在面板制造期间不同磷光体材料之间的任何可能相互作用。在替代实施例(其打算产生具有改进的显色指数(CRI)的光)中,发橙色光磷光体由发红色光磷光体替代。然而,由于红色磷光体的效率较低,因此可在面板所发射光的光亮度方面存在权宜。
在图4b中,磷光体图案包括两种磷光体材料的正方形区方格式(棋盘式)图案的规则阵列,其中绿色磷光体区40由实体正方形指示,橙色磷光体区42由交叉阴影正方形指示且透明窗口区28(即,不含有磷光体材料的区)由有轮廓线的正方形指示。与图4a的实施例不同,磷光体区的角落彼此邻接。如所图解说明,存在约为窗口区二倍多的绿色及橙色磷光体区。常规地,将磷光体图案丝网印刷到透明衬底上,但应了解,可使用任何适合的沉积技术。所属领域的技术人员将明了其它磷光体图案且所述其它磷光体图案将相依于所需照明效果且可包含(例如)为多边形、三角形、矩形、六边形或不规则形状的窗口区及/或磷光体区。而且,窗口区及/或磷光体区可包括规则或不规则图案。磷光体在油墨或涂料中的浓度、不同磷光体区的厚度及相对面积及一个或多个窗口区的面积及几个形状可经最优化以实现所需色彩的发射光的最高光输出效率。举例来说,在其它实施例中,每一磷光体区可经配置以吸收100%的激发光。而且,应了解,为产生大致均匀的照明效果,窗口及磷光体区应大致均匀地分布在面板的发光表面上方。
在替代实施例中,透明衬底24的表面拓扑结构可用于界面磷光体图案。在一个布置中,所述表面拓扑结构界定用于接收一种或多种磷光体材料的凹部阵列。在此类布置中,透明衬底是通过准确模制并使用(例如)由阿斯姆特克(Asymtek)制作的纳升级大小的柱塞式分配头将预先选定容积的磷光体/粘合剂混合物分配到每一凹部中制造。而且,发光面板的发光表面34可另外包含界定一个或一个以上光学组件的表面拓扑结构,例如透镜阵列或透镜结构。此类结构又可通过准确模制透明衬底来制造。
图5及6a分别是根据本发明的进一步实施例的边缘发光发白色光的照明面板510的透视及横截面示意图。在此说明中,以对应于既定实施例的初次图编号在前的相似参考编号用于标识相似零件。举例来说,图1的发光磷光体面板14在图5及6a中标识为514。
在此实施例中,发光磷光体面板514充当波导(光导)介质且引导来自边缘发光单元512的LED 520的激发光522。发光磷光体面板514包括透明材料(例如丙烯酸系树脂材料)的平面板524,其经尺寸设计以使得照明面板(包含围绕在面板的外围边缘处的边缘发光单元512)将装配在标准悬挂式天花板的板块孔径中。每一边缘发光单元512包括沿发光条536的长度安装的发蓝色光LED芯片520的线性阵列。发光条536提供到LED芯片520的电连接及通过将热传导到发光条的外表面来提供对芯片的热管理,所述发光条的外表面可包含一系列热辐射散热片(未显示)以辅助热从照明面板的辐射。发光条536的内表面(即,面向透明波导524的边缘的表面)可包含反射表面538以防止光从平面波导524的边缘逃逸。另一选择为,波导524的边缘可包含反射表面以最小化光从所述边缘逃逸。在所图解说明的实例中,沿两个垂直边缘提供边缘发光单元512,但在其它实施例中,可沿平面波导板524的一个、两个、三个或所有边缘提供边缘发光单元512。在波导524的发光表面534(即,如所图解说明的上部面)上,存在磷光体材料层526,其具有窗口区域528阵列。在波导524的下部面(即指向支撑天花板的面)上,存在高反射材料层540以确保大致所有光从发光磷光体面板514的发光面534发射。
在操作中,由LED芯片520产生的激发光522(其具有第一波长范围λ1)耦合到平面波导524中且经引导越过波导524的整个表面。穿过上部面(发光表面)发射的光穿过磷光体图案中的窗口528或者致使激发磷光体材料使其重新发射第二较长波长范围λ2的光530。从发光磷光体面板514的上部面发射的光532(其构成最终照明效果)是激发光522及磷光体所发射的光530的组合。通常,照明效果将为白色光且磷光体层可包括绿色(500到540纳米)或橙色(580到820纳米)发射磷光体或由蓝色激发光激活的磷光体材料的组合。面板510所产生的光的相关色温(CCT)可依据发光面板表面面积所包括的窗口区域与磷光体面积相比的比例及一种或多种磷光体材料的数量、厚度及组成来选择。在其它布置中,所述面板可经配置以通过适当选择磷光体材料、厚度及图案来产生彩色光。
波导524的发光表面534可另外包含界定一个或一个以上光学组件(例如透镜阵列或透镜结构)的表面拓扑结构以增强(促成)光从发光表面的发射及/或发射角度。在一个布置中,波导524的表面在沉积磷光体图案之前激光划线有互补图案。在替代布置中,波导可经准确模制以包含透镜阵列或其它光学特征以促使光从波导的发射面发射出来。另一选择为,波导的表面可包含对所述表面的粗糙化或对所述表面的规则图案化。
在其它布置中,如图6b中所图解说明,波导表面拓扑结构可用于界定磷光体/窗口图案以及促成光从波导的发光表面发射。在所示布置中,平面波导524的发光表面534包含浅凹部542阵列以便接收磷光体材料526。发光磷光体面板514可通过准确模制透明衬底524且然后使用(例如)由阿斯姆特克制作的纳升级大小的柱塞式分配头将预先选定容积的磷光体/粘合剂混合物分配到每一凹部中制造。另一选择为,可将磷光体/粘合剂混合物泼溅在波导的整个发光表面上方且然后用柔韧刮片或轧辊(橡皮辊)来擦拭所述表面以擦除多余磷光体材料使得磷光体材料仅保留在凹部中。另外,发光磷光体面板514可包含透镜544阵列或其它光学组件以聚焦或以其它方式引导照明面板的光发射532。
本发明边缘发光照明面板的优点是面板的小型性质,尤其是总厚度,其可以与发光磷光体面板514的厚度(即≈5到10毫米)相同。
尽管将照明面板510描述为用于悬挂式天花板中,但其也可用于与天花板齐平的墙壁上、作为地板的一部分或任一水平表面上,例如柜台顶部或如梯板或竖板等其它平面。此外,所述面板可用作建筑或家具的结构性组件的一部分。在梯板或竖板的情形中,光导优选地包括层压玻璃构造,其中磷光体图案并入居间的压层中的一者内。除了平坦面板照明外,将了解,也可按需要将发光面板制造为弯曲表面或其它形式。
图7是根据本发明进一步实施例的反光灯710的部分剖视透视图且打算作为常规MR16型卤素反光灯的直接替代物。灯710包括具有GU10底座752的半球形反射器750,且其打算用于110到240V AC干线电源操作。应了解,可使用其它反射器配置及/或底座,例如(举例来说)GU4、GU5.3、GX5.3、GY4及GZ4反光灯底座。在本发明的反光灯710中,卤素灯泡由安装在散热器754上的发蓝色光LED芯片720阵列替代。驱动器电路756藏纳于底座内以使LED芯片能够直接以干线供电源操作。
反光灯710进一步包括前罩758,其覆盖反射器750的开口。前罩758(其组成灯的发光表面734)包括透明板,(例如,举例来说丙烯酸系树脂板),其在其内部面(即,面向LED芯片的面)上具有磷光体材料层726。磷光体层(图案)726包含不包含任何磷光体材料的窗口728的规则阵列(图案)。由于磷光体发光的各向同性性质,所以尽管存在反射器750,所述灯发射的光732将不具有准确界定的光束图案。为沿所需方向调整及/或引导所发射的光,可将前罩758形成为透镜及/或所述前罩可在其外表面上包含透镜结构。在一个布置中,通过(例如)准确模制前罩来在所述罩的外表面上界定菲涅耳(Fresnel)透镜。如在其它实施例中,前罩758的表面(优选地内表面)的表面拓扑结构可用于界定磷光体及/或窗口图案。
图8是根据本发明的打算用作常规白炽灯泡的直接替代物的点亮着的灯泡810的部分剖视透视图。灯泡810(其打算用于110到240V AC的干线电源操作)包括透明包壳850及E26标准底座(螺旋式连接器)860,将了解,可使用其它包壳形状及/或连接器,例如(举例来说)卡口式连接器。在本发明的灯泡810中,钨丝布置被安装在散热器854上的发蓝色光LED芯片820阵列替代。驱动器电路(未显示)藏纳在螺旋式连接器860内以使所述LED芯片能够直接以干线供电源操作。
包壳858(其组成灯泡的发光表面834)优选地包括透明塑料材料(例如丙烯酸系树脂)且在其整个表面上方具有磷光体材料层826。所述磷光体层826包含不包含任何磷光体材料的窗口828的图案(阵列)。所述磷光体层可提供于包壳的内表面或外表面上,但对于制作简便来说,前者为优选的。由于磷光体材料更易于提供于包壳的外表面上,所以灯泡优选地进一步包含覆盖磷光体层的透明外部保护层(未显示)。
图9是根据本发明进一步实施例的管灯910的部分剖视透视示意图。灯910可用于替代常规的管形白炽灯泡或可用作荧光灯管的替代物且打算用于110到240V AC的干线电源操作。在此实施例中,灯910形式上为细长且包括藏纳发光条964的细长罩壳962,所述发光条包括蓝色LED芯片920的线性阵列。LED芯片920沿发光条964的长度等距离的间隔开以在罩壳内提供大致均匀的照明。发光条964及罩壳962可由导热材料(金属或加载金属的环氧树脂/硅树脂)制成且优选地彼此热连通以将LED芯片920产生的热从灯的背面传导出去。罩壳的背面可进一步包含一系列热辐射散热片(未显示)以辅助热的有效消散。驱动器电路(未显示)藏纳于罩壳内以使LED芯片能够经由连接引线966直接以干线供电源操作。
灯910的发光表面934包括具有沿其长度延伸的开口的大体管形透明罩950且由透明塑料材料制成,例如丙烯酸系树脂。所述罩在其整个表面上方具有磷光体材料层926且包含不包含任何磷光体材料的窗口928的图案。罩968的开口边缘安装在罩壳962中且不透明的端帽970覆盖所述罩的开口端以防止光从灯的端部逃逸。
应了解,本发明并不限于所描述的具体实施例且可在本发明的范围内做出变化。本发明实施例针对具有发光表面的发光装置及照明系统,所述发光表面包含一种或一种以上磷光体材料及一个或一个以上窗口区域以允许激发光及磷光体所产生的光的发射。
磷光体区及/或窗口区域的布置及相对比率可经选择以实现所发射光的所需色彩及/或色温。为确保在发光表面的整个区域上方产生大致均匀色彩照明效果,窗口区域及/或磷光体区应大致均匀地分布在发光表面上方。可将发光表面配置为光透射或波导光学布置。在一个布置中,发光表面包括其上沉积有磷光体材料图案的透明膜。然后,可将此类膜施加于现有光学组件的发光表面。
为进一步增强所发射光的色彩均匀性,所述装置可进一步包含光扩散层,其可(举例来说)包括携载光散射颗粒(例如,二氧化硅)的透明材料。
而且,尽管在所述的实例中,单个色彩LED(优选地为蓝色)既用作磷光体激发源又用于给发射效果贡献光,但可构想在使用两种或两种以上不同色彩LED及一种或一种以上磷光体材料的组合以产生所需发光效果的进一步实施例中,(例如,在打算产生具有高CRI(显色指数)的白色光的一个布置中),使用蓝色LED芯片来激发绿色磷光体材料且使用橙色或红色LED芯片来产生最终发射效果的橙色或红色光分量。在此类布置中,发射效果包括红色(R)、绿色(G)及蓝色(B)分量。优选地,蓝色LED对橙色及/或红色LED芯片的比率大致为2∶1以确保绿色光贡献足够实现所需的CRI。应了解,在此类布置中,橙色及/或红色LED所产生的光不会导致激发磷光体且此类光穿过发光磷光体表面中的一个或一个以上窗口发射。在替代布置中,蓝色LED可用于激发发橙色或红色光的磷光体且一个或一个以上发绿色光的LED芯片可用于给发射效果贡献绿色光。
Claims (21)
1.一种发光装置,其包括:至少一个激发源,其可操作以产生第一波长范围的激发光;及发光表面,其具有吸收所述激发光的至少一部分且发射第二波长范围的光的至少一种磷光体材料,其中所述装置所发射的光包括所述发光表面所发射的所述第一与第二波长范围的组合光,所述装置的特征在于所述发光表面具有不包含所述至少一种磷光体材料的至少一个窗口区域,所述窗口区域对所述第一及第二波长的光大致透明。
2.如权利要求1所述的发光装置,其中所述发光表面包括衬底,所述衬底对所述第一及第二波长的光大致透明且在其表面上具有所述至少一种磷光体材料。
3.如权利要求2所述的发光装置,其中所述至少一种磷光体材料包括磷光体区阵列,其中磷光体区之间的间隙界定所述至少一个窗口区域。
4.如权利要求3所述的发光装置,其中所述磷光体区分布在所述发光表面的大致整个表面上方。
5.如权利要求4所述的发光装置,其中所述磷光体区大致均匀地分布在所述发光表面上方。
6.如权利要求3所述的发光装置,其中所述磷光体区的形状选自由以下大致形状构成的群组:多边形;正方形;圆形;椭圆形;三角形;及矩形。
7.如权利要求2所述的发光装置,其中所述至少一种磷光体材料大致覆盖所述发光表面且包含窗口区域阵列。
8.如权利要求7所述的发光装置,其中所述窗口区域分布在所述发光表面的大致整个表面上方。
9.如权利要求8所述的发光装置,其中所述窗口区域大致均匀地分布在所述发光表面上方。
10.如权利要求7所述的发光装置,其中所述窗口区域的形状选自由以下大致形状构成的群组:多边形;正方形;圆形;椭圆形;三角形;及矩形。
11.如权利要求2所述的发光装置,其中所述衬底包括波导介质且其中所述激发源经配置以将所述激发光耦合到所述衬底中。
12.如权利要求11所述的发光装置,其中所述衬底在形式上为大致平面且其中所述激发光耦合到所述衬底的边缘的至少一部分中。
13.如权利要求12所述的发光装置,且其进一步包括位于所述衬底的与所述发光表面相对的表面的至少一部分上的反射器。
14.如权利要求12所述的发光装置,且其进一步包括所述衬底的具有用以促成光从发光表面衬底的发射的表面拓扑结构的所述发光表面。
15.如权利要求2所述的发光装置,且其进一步包括至少两种不同磷光体材料的图案。
16.如权利要求2所述的发光装置,其中所述衬底选自由以下各项构成的群组:丙烯酸系树脂、聚碳酸酯、聚乙烯及玻璃。
17.如权利要求1所述的发光装置,其中所述至少一个激发源包括发蓝色光二极管。
18.如权利要求17所述的发光装置,且其进一步包括可操作以产生第三波长范围的光的至少一个发光二极管,所述第三波长范围的光给所述装置通过所述发光表面所发射的光作贡献。
19.如权利要求18所述的发光装置,其中所述至少一个发光二极管可操作以产生第三波长范围的光,所述第三波长范围的光选自由以下各项构成的群组:橙色光;红色光;及绿色光。
20.如权利要求1所述的发光装置,其中所述至少一种磷光体材料选自由以下各项构成的群组:基于硅酸盐的磷光体;基于铝酸盐的磷光体;基于氮化物的磷光体材料;基于硫酸盐的磷光体材料;基于含氧氮化物的磷光体;基于含氧硫酸盐的磷光体;石榴石材料;一般组成为A3Si(OD)5的基于硅酸盐的磷光体,其中Si为硅,O为氧,A包括锶(Sr)、钡(Ba)、镁(Mg)或钙(Ca)且D包括氯(Cl)、氟(F)、氮(N)或硫(S);一般组成为A2Si(OD)4的基于硅酸盐的磷光体,其中A包括Sr、Ba、Mg或Ca且D包括Cl、F、N或S;及具有式M1-xEuxAlyO[1+3y/2]的基于铝酸盐的磷光体,其中M为包括Ba、Sr、Ca、Mg、Mn、Zn、Cu、Cd、Sm或铥(Tm)的二价金属中的至少一者。
21.一种发光装置,其包括:罩壳,其具有反射内表面;至少一个激发源,其藏纳于所述罩壳内且可操作以产生第一波长范围的激发光;及发光表面,其覆盖所述罩壳的开口且具有至少一种磷光体材料,所述至少一种磷光体材料吸收所述激发光的至少一部分且发射第二波长范围的光,其中所述装置所发射的光包括所述发光表面所发射的所述第一与第二波长范围的组合光,所述装置的特征在于所述发光表面具有不包含所述至少一种磷光体材料的至少一个区域,所述区域对所述第一及第二波长的光大致透明,借此允许激发光的一部分及经反射的磷光体所产生的光穿过所述发光表面。
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Also Published As
Publication number | Publication date |
---|---|
TWI453946B (zh) | 2014-09-21 |
KR20100077199A (ko) | 2010-07-07 |
EP2201617A1 (en) | 2010-06-30 |
JP2011501865A (ja) | 2011-01-13 |
US7915627B2 (en) | 2011-03-29 |
US8686449B2 (en) | 2014-04-01 |
US20120299032A1 (en) | 2012-11-29 |
US20140299895A1 (en) | 2014-10-09 |
TW201246597A (en) | 2012-11-16 |
TW200929621A (en) | 2009-07-01 |
US20110170277A1 (en) | 2011-07-14 |
US20090101930A1 (en) | 2009-04-23 |
US8188502B2 (en) | 2012-05-29 |
WO2009052329A1 (en) | 2009-04-23 |
CA2702436A1 (en) | 2009-04-23 |
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