TW200929621A - Light emitting device with phosphor wavelength conversion - Google Patents
Light emitting device with phosphor wavelength conversion Download PDFInfo
- Publication number
- TW200929621A TW200929621A TW097139987A TW97139987A TW200929621A TW 200929621 A TW200929621 A TW 200929621A TW 097139987 A TW097139987 A TW 097139987A TW 97139987 A TW97139987 A TW 97139987A TW 200929621 A TW200929621 A TW 200929621A
- Authority
- TW
- Taiwan
- Prior art keywords
- light
- phosphor
- light emitting
- emitting device
- emitting surface
- Prior art date
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 205
- 238000006243 chemical reaction Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 109
- 230000005284 excitation Effects 0.000 claims abstract description 58
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- 229910052788 barium Inorganic materials 0.000 claims description 13
- 229910052749 magnesium Inorganic materials 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 229910052712 strontium Inorganic materials 0.000 claims description 13
- 229910052731 fluorine Inorganic materials 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 8
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- 150000002602 lanthanoids Chemical class 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 5
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- 229910052793 cadmium Inorganic materials 0.000 claims description 5
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- 150000004767 nitrides Chemical class 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229910052772 Samarium Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052801 chlorine Inorganic materials 0.000 claims description 3
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- 239000011737 fluorine Substances 0.000 claims description 3
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- 239000011593 sulfur Substances 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- DQUIAMCJEJUUJC-UHFFFAOYSA-N dibismuth;dioxido(oxo)silane Chemical compound [Bi+3].[Bi+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O DQUIAMCJEJUUJC-UHFFFAOYSA-N 0.000 claims 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims 1
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- 238000005286 illumination Methods 0.000 description 36
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- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 4
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- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 3
- 229910002601 GaN Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 3
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- 229910052727 yttrium Inorganic materials 0.000 description 3
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- 229910052782 aluminium Inorganic materials 0.000 description 2
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- 150000002367 halogens Chemical class 0.000 description 2
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- 229910052746 lanthanum Inorganic materials 0.000 description 2
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- 229910021653 sulphate ion Inorganic materials 0.000 description 2
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- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
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- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000254158 Lampyridae Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 238000000149 argon plasma sintering Methods 0.000 description 1
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- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
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- 230000015556 catabolic process Effects 0.000 description 1
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- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical class CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
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- 239000011630 iodine Substances 0.000 description 1
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- 238000004020 luminiscence type Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- SITVSCPRJNYAGV-UHFFFAOYSA-L tellurite Chemical compound [O-][Te]([O-])=O SITVSCPRJNYAGV-UHFFFAOYSA-L 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F21K9/20—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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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]
-
- 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
-
- 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]
Landscapes
- 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)
Description
200929621 九、發明說明: 【發明所屬之技術領域】 本發明係關於具有磷波長轉換的光發射裝置。更明確地 說’本具體實施例係關於發光二極體為基礎的發光系統, 其具有磷(光致發光)波長轉換以產生光之一所需色彩及/或 ‘ 色溫。 . Yi-Qun Li在2007年10月17日申請的標題為”具有磷波長 轉換的光發射裝置(Light Emitting Device with Phosphor o Wavelength Conversion)”的美國專利申請案第^/975,^0號 (律師檔案號碼ITMX-00225US0)。 【先前技術】 固態半導體裝置(尤其係發光二極體(LED))的發展已開 啟新一代節能發光系統的可能。直至以電磁頻譜之藍色/ 紫外線部分發射的LED係開發,開發基於LED的白色光源 ("白色LED")才變得實際。 ©例如US 5,998,925中所教導,白色LED包括一或多個磷 光體材料(其係光致發光材料),其吸收藉由LED晶片發射 的輻射之一部分並重新發射一不同色彩(波長)之光。一般 而言,該LED晶片或晶粒產生藍色光並且該(等)磷光體吸 收一百分比之藍色光並重新發射黃色光或綠色光與紅色 光、綠色光與黃色光或黃色光與紅色光之一組合。未藉由 該磷光體吸收的藉由該LED產生之藍色光之部分(即,藉由 該磷光體發射之部分)係與藉由該磷光體發射之光組合並 提供人眼看起來係幾乎白色的光,磷光體層通常係(例如) 135485.doc 200929621 相鄰或緊鄰該LED晶粒/晶片之一光發射表面來置放,該等 磷光體層自其獲得其激發能量。通常,該磷光體層係直接 塗布至該LED晶粒上以實現照明產物的所需強度與色彩。 如所知,一白色光源之相關色溫(CCT)係藉由比較其色 調與一理論加熱黑體輻射器來決定e CCT係以開氏溫度 (Κ)指定並對應於輻射與該光源相同的白色光之色調的黑 體輻射器之溫度。一白色LED之CCT一般係藉由該磷光體 組成物及併入該LED中之磷光體的量來決定。 今天,大部分使用LED的發光器具設計包含其中一 LED(更通常的係一 LED陣列,其用以實現產生的光之一所 需強度)取代傳統系統組件(例如白熾燈泡、汞汽及小型螢 光燈)的系統。在旨在產生一白色光照明產物之發光系統 的情況下,該等LED可包含紅色、綠色及藍色直射光產生 LED(即’不包括一波長轉換磷光體材料的lED)之一陣列 或最近係白色LED之一陣列。 如US 6,350,041、WO 2004/100226及吾人之共同待審美 國專利申請案11/827,890與11/714,464中所揭示,可遠離其 關聯激發源來提供該磷光體材料。 US 6,35〇,041教導基於一 LED之一固態燈,其徑向發射 分散光以用於室内照明及其他應用。該燈包含諸如一 LED 或雷射之一固態光源,其透過一分離器將光傳輸至一分散 器,該分散器以一所需圖案來分散該光及/或改變光的色 彩。在一具體實施例中,該光源包含一藍色光發射LED, 該分離器係一光導管或光纖裝置,而該分散器徑向地分散 135485.doc 200929621 該光並將某些藍色光轉換至黃色以產生一白色光照明產 物。該分離器將該LED自該分散器分隔一充分距離,以使 得當按室内照明所必需來以提高的電流操作該LED時來自 該LED的熱不會傳送至該分散器。此一燈可以許多圖案來 分散光,但尤其適用於用於室内照明的白色光之一徑向分 散,從而致能該燈在既有燈具與發光器具中係用作一替代 性光源。 2007年7月13日申請的序號為11/827,890的吾人之共同待 審美國專利申請案教導其中該磷光體材料係遠離其關聯激 發源(LED)定位的LED發光/照明系統/器具或燈具。藉由該 LED產生的光係經由一波導媒體運輸至該磷光體材料並將 激發輻射提供至該(等)磷光體及/或磷光體層,從而引起一 光致發光。來自該(等)磷光體的光可包含最終照明產物, 或可將其與來自該激發源之任何可見光相組合(例如,其 可在一藍色LED作為該激發源之情況下發生)。該最終照明 產物可以係白色光或任何色彩的光。可將該波導組態成一 發光系統的形狀,例如一懸掛式發光器具、一台式發光器 具、一落地式發光器具、一檯燈、軌道照明、聚光照明、 重點照明或用於併入至一懸吊天花板中之一發光面板。在 該發光面板組態中,該波導係實質上平面形式並具有提供 於該波導之整個光發射面上的磷光體。藉由複數個led產 生的激發輻射係耦合至該波導之一或多個邊緣中以便實質 上在整個波導中傳播並接著係透過該光發射面發射,其中 該激發輻射之至少一部分激發發射一第二波長之光的磷光 135485.doc 200929621 體。為了防止光透過該面板的後部面損失,在該波導的後 部面(即,與該光發射面相對之面)上提供一反射層。 2007年5月3日申請的美國專利申請案序號11/714,464教 導其中該磷光體係提供於遠離該激發源(LED)定位之一遮 蔽物上的發光器具與系統。該遮蔽物(光學外殼)經組態用 以至少部分地圍繞該LED以使得激發輻射在自由空間中 (即,其並不藉由一光學媒體來導引)行進、傳播自該激發 源至該遮蔽物的至少一釐米之一距離。可將該磷光體提供 於該遮蔽物之内表面或外表面上或併入至該遮蔽材料内。 在一具體實施例中’該發光系統包含一艙壁燈,其包含一 含有一或多個LED的外罩,而該遮蔽物包含一前窗,其覆 蓋外罩開口。由一不透明材料製成的外罩包括反射内表面 以用於朝向該遮蔽物反射光。 WO 2004/100226揭示一LED面板燈’其包含裝載複數個 UV (ultraviolet ;紫外線)發射LED之一外殼與包含一或多 個UV可激發磷光體材料之一可卸除前光發射面板。因為 一磷光體材料產生在所有方向上相等輻射(各向同性)的 光,故某些磷光體產生的光將係導回至該外殼中。為了防 止此類光進入該外殼並係損失,該前面板在其内部表面上 包括一塗層’其對該led之波長而言係透射性而對藉由該 (等)磷光體產生的波長而言係反射性。此外,為了防止非 轉換的UV光之流過,該前面板可在其外部表面上包括一 第二塗層,其反射UV光並透射藉由該(等)磷光體產生的 光。該文件還說明類似一標準白熾燈泡之一發光系統,其 135485.doc 200929621 中在該燈泡包絡之内表面上包括一或多個磷光體材料。 雖然此類發光系統設計可具有一些客戶可接受的所示特 性(例如,諸如強度、色溫及色覺之特性),但仍需要基於 甚至更高效率的固態組件之一發光系統。 【發明内容】 本發明力圖提供一具有磷波長轉換的光發射裝置,其至 少部分地克服已知裝置的限制。本發明之具體實施例係關 於包含一激發源(例如,其可以係一led或一雷射二極體) 與包括一或多個磷光體(光致發光)材料之一光發射表面的 光發射裝置。來自該激發源之光提供一激發輻射至該(等) 磷光體從而引起一光致發光0與來自該激發源之光組合的 藉由該磷光體所產生之光包含該裝置之照明產物。與已知 裝置形成對比,該光發射區域進一步包含一或多個區域 (窗),其不包括磷光體材料並且其對藉由該磷光體與藉由 該激發源產生的兩種光而言係實質上透明。此類窗藉由最 大化由該裝置發射的光來改良該裝置之效率。 依據本發明,一光發射裝置包含:至少一激發源(例如 一或多個藍色發光二極體),其可操作以產生一第一波長 範圍之激發光;以及一光發射表面,其具有至少一磷光體 材料’該磷光體材料吸收該激發光之至少一部分並發射一 第二波長範圍之光,其中藉由該裝置發射的光包含藉由該 光發射表面發射的第一波長範圍與第二波長範圍之組合 光’其特徵為該光發射表面具有不包括該至少一碌光體材 料的至少一窗區域,該窗區域對第一波長與第二波長之光 135485.doc •10· 200929621 係實質上透明。 該光發射表面較佳的係包含一透明基板(例如一丙烯 酸、聚碳酸酯、聚乙烯或玻璃材料),其對第一波長與第 一波長之光係實質上透明並且在其一表面上具有該至少一 磷光體材料。該磷光體材料可包含磷光體區(島)之一陣列 (圖案),其中磷光體區之間的間隙定義該至少一窗區域。 * 為了確保發射的光之一均勻色彩及/或色溫,磷光體區之 圖案較佳的係實質上均勻地分佈於該光發射表面之實質上 整個區域上。在其中磷光體區之陣列包含正方形磷光體區 之一規則陣列的一此類配置中,該窗區域將係柵格狀形式 並係分佈於該光發射表面上。例如,該等磷光體區可以係 實質上多邊形、正方形、圓形、擴圓形、三角形或矩形的 形狀。相反,該磷光體材料可覆蓋整個光發射表面並包括 ®區域之陣列。為了確保發射的光之一均勻色彩及/或 色溫,窗區域之圖案較佳的係實質上均勻地分佈於該光發 φ 射表面之實質上整個區域上。如該等磷光體區,該等窗區 域可以係(例如)實質上多邊形、正方形、圓形、橢圓形、 三角形或矩形的形狀。磷光體區及/或窗區域之陣列可以 係一規則或不規則圖案。 可將該基板組態為—光學組件,該激發光與磷光體產生 的光透過其傳冑。替A地,可將該基板組態為一波導(光 導)媒體並且該激發源可經組態用以將激發光麵合至該基 板中纟此類配置中,該基板係實質上平面形式並且該 激發光係搞合至該基板之一邊緣之至少一部分中。較佳的 135485.doc 200929621 係,該裝置在與該光發射表面相對的基板之表面之至少一 部分上進一步包含一反射器以幫助確保實質上所有光都係 自該光發射表面發射1 了促進光自該光發射表面的發 射,該基板之光發射表面可包括一表面拓撲,例如一表面 圖案化。可藉由雷射或機械切割該基板表面,模製該基板 . 以包括該表面拓撲或粗糙化該表面來定義該表面拓撲。該 基板了包3其他波導形式(例如係伸長或圓柱形式),其中 該光發射表面係該波導之一實質上平坦面或彎曲表面。 在需要產生一特定色彩及/或CCT之光之處,該光發射表 面較佳的係包含至少兩個不同磷光體材料之一圖案。可使 用磷光體組成物、磷光體材料的密度及該等磷光體材料與 窗區域之相對總面積來控制該發射的光之色彩及/4CCT。 對於旨在產生具有一高CRI(演色性指數)的白色光之一 光發射裝置而言,該裝置可進一步包含一或多個LED,其 可操作以產生一第三波長範圍之光,該光有助於由該裝置 φ 藉由該光發射表面發射的光。在一配置中,藍色LED係用 以激發一綠色發射磷光體材料而橙色或紅色LED係用以產 生最終發射產物之橙色或紅色光成分。應明白,在此一配 置中’該發射產物包含紅色(R)、綠色(G)及藍色(B)成分。 較佳的係’藍色LED與撥色或紅色LED晶片之比率係實質 上一比一以確保該綠色光供給足以實現一需要的CRI。應 明白,在此一配置中,藉由該等橙色或紅色lee>產生之光 並不導致該磷光體之激發並且此類光係發射透過光發射磷 光體表面中之一或多個窗區域。在一替代性配置中,可使 135485.doc _ n 200929621 用藍色LED來激發一橙色或紅色發射磷光體並且可使用一 或多個綠色發射LED晶片來供給綠色光至該發射產物。 該鱗光體材料可包含:一以矽酸鹽為主的磷光體;一以 銘酸鹽為主的碌光體;一以氣化物為主的磷光體材料;一 以硫酸鹽為主的磷光體材料;一以氮氧化物為主的磷光 體;一以硫酸氧鹽為主的磷光體;一石榴石材料;一般組 成物A3Si(OD)5之一以發酸鹽為主的鱗光體,其中si係石夕、 〇係氧、A包含锶(Sr)、鋇(Ba)、鎂(Mg)或鈣(ca)而D包含 氣(C1)、氟(F)、氮(N)或硫(S); —般組成物A2Si(〇D)4之一 以石夕酸鹽為主的填光體,其中A包含Sr、Ba、Mg或Ca而D 包含C卜F、N或S ;或化學式Mi.xEuxAly〇[丨+ 3y/2]之一以鋁 酸鹽為主的磷光體,其中Μ係包含Ba、Sr、Ca、Mg、 Μη、Zn、Cu、Cd、Sm或録(Tm)之二價金屬之至少一者。 依據本發明之另一態樣’一光發射裝置包含:一外殼, 其具有一反射内表面;至少一激發源,其係裝載於該外殼 内並可操作以產生一第一波長範圍之激發光;以及一光發 射表面,其覆蓋該外殼之開口並具有至少一磷光體材料, 該磷光體材料吸收該激發光之至少一部分並發射一第二波 長範圍之光,其中藉由該裝置發射的光包含藉由該光發射 表面發射的第一波長範圍與第二波長範圍之組合光,其特 徵為該光發射表面具有不包括該至少一磷光體材料的至少 一區域,該區域對第一波長與第二波長之光係實質上透明 從而允許激發光之一部分與反射的磷光體產生的光通過該 光發射表面。 135485.doc -13- 200929621 【實施方式】 圖1與2分別係依據本發明之一白色光發射發光面板_ 2視圖與斷面示意圖。該發光面板10旨在用於常用於辦公 室與商用住所中的一類型之一懸吊(吊頂)天花板中其中 . 支撐部件(τ條)之-柵格係藉由缦線自天花板懸吊而天花 . 板碑/發光面板係藉由支撐部件之柵格來支撐。一般而 t ’該等天花板碑係正方形(2英尺X2英尺,60 cmx60 cm) 或矩形(4英尺x2英尺,emx6G em)形狀,並且本發明之 Ό 發光面板經組態用以擬合於此一孔徑内。 該發光面板Η)包含一背光單元12與一光發㈣光體面板 14。該背光單元12包含一光箱16,其係(例如)自薄片金屬 裝成,自一塑膠材料模製而成或自任何其他適合材料建構 而成為了最大化來自該發光面板的光發射,該光箱16之 内表面18較佳的係包含光反射表面以朝向該光發射面板14 反射光。在該光箱16内提供發光二極體(LED) 2〇之一陣 〇 列。各LED 20皆可操作以產生波長λ!之光22並且各較佳的 係包含一以InGaN/GaN(氮化銦鎵/氮化鎵)為主的LED晶 片’其產生波長400至480 nm之藍色光。說明九個LED晶 片20之一正方形陣列,不過應明白可修改該等LED之數目 與布局以適應一需要的應用。如將說明,藉由該等LEd 20 產生之光22提供兩個功能:首先其包含最終照明產物32之 一部分;以及其次其提供激發輻射以用於激發該磷光體面 板14之磷光體材料,鑑於後者功能,下文中該光22將係稱 為激發光β 135485.doc -14 - 200929621 該光發射填光體面板14包含一透明基板24(例如,_丙 烯酸薄片),在一下方表面(即,面向該等LED的基板之表 面)上提供璃光體材料(光致發光材料)2 6之一層。在其他配 置中,該透明基板24可包含其他透明材料,例如一聚碳酸 醋、聚乙烯或玻璃。該麟光體材料26可包含能夠藉由該激 發光22來激發的任何光致發光材料,例如以;5夕酸鹽、正石夕 酸鹽、氮化物、氮氧化物、硫酸鹽、硫酸氧鹽、石榴石或 鋁酸鹽為主的磷光體材料。在較佳具體實施例中,該璘光 體材料係一般組成物A3Si(OD)5或A2Si(OD)4之一以矽酸鹽 為主的填光體,其中Si係矽,〇係氧,a包含錄(Sr)、鋇 (Ba)、鎂(Mg)或鈣(Ca)而D包含氣(C1)、氟(F)、氮(N)或硫 (S)。以石夕酸鹽為主的鱗光體之範例係吾人在2〇〇7年4月9 曰申請的共同待審的美國專利申請案US2006/0145123、 US2006/028122 、 US2006/261309 、 US2007029526 及 11/786,044中予以揭示,各申請案之内容在此以引用方式 併入本文中。 如在US2006/0145123中所教導,一銪(Eu2+)活化的以矽酸 鹽為主的綠色磷光體具有通式(Sr,Ai)x(Si,A2)(〇,A3)2+x:Eu2+, 其中.A〗係一 2+陽離子、1 +與3 +陽離子之一組合的至少一 者,例如 Mg、Ca、Ba、鋅(Zn)、鈉(Na)、鋰(Li)、鉍 (Βι)、釔(Y)或鈽(Ce) ; a2係一 3+、4+或5 +陽離子,例如硼 (B)、鋁(A1)、鎵(Ga)、碳(c)、鍺(Ge)、N或磷;以及 & 係一 1-、2-或3-陰離子,例如F、c卜溴(Br)、N4s。化學 式係書寫以指不A】陽離子取代Sr ;該&陽離子取代si ;以 135485.doc •15- 200929621 及該As陰離子取代〇。χ之值係一整數或在2.5與3.5之間的 非整數。 US2006/028122揭示具有一化學式A2Si04:Eu2+D之一以 矽酸鹽為主的黃綠色磷光體,其中A係一二價金屬之至少 一者’其包含Sr、Ca、Ba、Mg、Zn或鎘(Cd);以及D係一 摻雜物’其包含F、CM、Br、碘(I)、P、S及N。該摻雜物d 可按範圍係自大約0.01至20莫爾百分比之一數量存在於該 磷光體中。該磷光體可包含(Sri-x_yBaxMy)Si04:Eu2+F,其 中Μ包含Ca、Mg、Zn或Cd。 U52006/261309教導一兩相位以石夕酸鹽為主的鱗光體, 其具有:一第一相位,其具有與(Ml)2Si04之晶體結構實質 上相同之一晶體結構;以及一第二相位,其具有與 (M2)3Si〇5之晶體結構實質上相同之一晶體結構,其中M1 與M2各包含Sr、Ba、Mg、Ca或Zn。至少一相位係以二價 銪(Eu2+)活化並且該等相位之至少一者包含一掺雜物〇, 該摻雜物包含F、Cl、Br、S或N。咸信至少某些該等摻雜 物原子係位於主矽酸鹽晶體之氧原子晶格位置上。 US2007/029526揭示具有化學式(Sri_xMx)yEUzSi05之一以 矽酸鹽為主的橙色磷光體,其中Μ係包含Ba、Mg、Ca或 Zn之一二價金屬之至少一者;〇<χ<〇·5 ; 2.6<y<3.3 ;以及 0·001<ζ<0.5。該磷光體經組態用以發射具有大於大約565 nm之一峰值發射波長的可見光。 11/786,044教導通式(AAJdSiBaOCOs之一橙紅色磷光 體,其中與A2各包含Sr、Ba、Mg、Ca、Zn、Y、鋼 135485.doc -16- 200929621 (La)、镨(Pr)、釤(Sm)或 Bi,B 丨包含Al、B、P、或〇e 而 Ci 包含 F、Cl、Br、S或 N。 該鱗光體亦可包含一以鋁酸鹽為主的材料,例如在吾人 之共同待審的專利申請案US2006/0158090與US2006/0027786 中所教導,各申請案之内容在此以引用方式併入本文中。 . US2006/0158090教導化學式 之一以鋁 • 酸鹽為主的綠色磷光體,其中Μ係包含Ba、Sr、Ca、Mg、 Μη、Zn、Cu、Cd、Sm及铥(Tm)之二價金屬之至少一者且 ❿ 其中 〇·1<χ<〇.9且 0.5SlyS12。 US2006/0027786揭示具有化學式(MbEu^MgzAlA^】之 一以銘酸鹽為主的麟光體’其中Μ係Ba或Sr之一二價金屬 之至少一者。在一組成物中,該磷光體經組態用以吸收範 圍係自大約280 nm至420 nm之一波長中的輻射,並用以發 射具有範圍係自大約420 nm至560 nm之一波長的可見光, 並且 0.05<x<0.5 或 0.2<x<0.5 ; 3SlyS12 且 0.8SlzS12。該鱗光 ❹ 體可進一步以一鹵素摻雜物Η(例如C卜Br或I)來摻雜並可屬 於 '~~ 般組成物(Mi_xEux)2_zMg2AlyO[i+3y/2].:H。 應明白’該磷光體並不限於本文中說明的範例,並可包 . 含任何無機磷光體材料,其包括(例如)氮化物與硫酸鹽磷 • 光體材料、氮氧化物與硫酸氧鹽碌光體或石權石材料。 圖3係該光發射麟光體面板14之一平面圖。在所說明的 具體實施例中’該磷光體層26在該面板之整個表面上包含 磷光體材料之一均勻層並具有不包括磷光體材料的圓形區 域28之一規則陣列(圖案)。該等圓形區域28構成光發射磷 135485.doc -17- 200929621 光體面板14内的窗或孔徑之一陣列或圖案。可藉由將該磷 光體材料與一黏合劑(例如,NAZDAR的透明網版油墨 9700)之一混合物網版印刷至該透明基板24之表面上來製 造光發射磷光體面板14。應明白,可藉由其他沈積方法 (例如噴灑、喷墨印刷等等)來產生該磷光體圖案◊為了保 護該磷光體圖案26,可將該面板14黏著至該背光單元12並 使該磷光體圖案26面向該等LED 20。在其他配置中,該光 發射磷光體面板可在該磷光體層上進一步包括一透明保護 層或膜(未顯示)。 圖1與2之發光面板1 〇經組態用以產生具有一 θ7〇〇〇 κ之 相關色溫(CCT)的冷白(CW)光,並且該磷光體材料26可包 含(例如)產生波長λ2»500至540 nm之光之一以石夕酸鹽為主 的綠色光發射磷光體材料、產生波長12354〇至58〇 nm之光 之一石權石或以矽酸鹽為主的黃色光發射磷光體、以矽酸 鹽為主的綠色與橙色光發射磷光體之一混合物或以矽酸鹽 為主的綠色與以氮化物為主的紅色光發射磷光體之一混合 物。在操作中’藉由該等LED 2〇發射的激發光22照射該光 發射麟光體面板14 ^該磷光體材料26吸收一比例之激發光 22從而引起重新發射波長χ2之綠色光3〇的磷光體之激發。 自該面板之上部面(光發射表面)34發射的光32(其包含最終 照明產物)係藉由該磷光體產生的綠色光(人2)與未藉由該破 光體吸收的藍色激發光(λ〗)之一組合,並且此對人眼將呈 現為白色。藉由該磷光體吸收的藍色激發光22之比例將取 決於每單位面積的磷光體材料之密度與該磷光體層26之厚 135485.doc •18- 200929621 度。由於嶙光體發光之各向同性性質所致,此意味著該鱗 光體將在返回至該發光面板中之一方向上發射其大約百分 之五十的輻射此類光將係藉由該光箱之反射内表面18反 射回朝向該面板之光發射表面34。因為該等窗28對藉由該 等LED發射之光(λι)與藉由該磷光體產生之光(μ)係透明 _ 的,故該等窗允許自該發光面板發射藍色光與綠色光兩 . 者。本發明之光發射裝置之一優點係超過已知配置之一增 ㈣光輸出並因此係、改良的效率。本發明之另-優點係因 為該磷光體材料係提供於與一併入一磷光體的LED相比較 相對較大之一區域上’故此防止該磷光體材料的熱退化。 圖4a與4b係依據本發明之另外具體實施例的光發射磷光 體面板14。在此等具體實施例中,該磷光體包含兩個不同 磷光體材料之一圖案。對於要產生一選定CCT之一白色光 的一發光面板而言,該磷光體材料可包含(例如)以矽酸鹽 為主的綠色(《500至54〇 nm)與橙色0575至61〇 發射磷 φ 光體。在一較佳配置中,該磷光體面板包含綠色與紅色光 發射磷光體之一圖案。 在圖4a中,該磷光體圖案包含交替磷光體材料之隔開的 正方形區域之一規則(正方形)陣列,其申綠色磷光體區4〇 ' 係藉由實心正方形指示而橙色磷光體區42係藉由交又斜線 的正方形指示。在磷光體材料之正方形島之間的所有區域 (即,不包含磷光體材料之區域)包含一窗28,其係柵格狀 形式並係均勻地分佈於該面板之整個表面區域上。可藉由 混和粉末狀磷光體材料與一透明網版油墨或透明油漆來網 135485.doc 19· 200929621 版印刷該鱗光體圖案。通常,填光體在沈積的材料中之重 量負載係在10與30%之間,不過其範圍可在1與99%之間, 視所需照明產物而定^為了每單位面積沈積一充分密度的 鱗光體材料(例如《0.02至0.04 g/cm2),可能需要進行多回 印刷進程(4至12個進程),進程數目視該印刷網版的網目大 小。圖4a之磷光體圖案之一優點係因為該等磷光體區係隔 開,故此防止在製造該面板期間不同磷光體材料之間的任 何可能的交互作用。在旨在產生具有一改良演色性指數 (CRI)的光之一替代性具體實施例中,該橙色光發射磷光 體係藉由一紅色光發射磷光體予以取代。然而,由於紅色 鱗光體之更低效率所致’在藉由該面板發射之光的亮度方 面可能存在一折衷。 在圖4b中’該磷光體圖案包含該兩個磷光體材料的正方 形區之一規則陣列(一方格(棋盤)圖案),其中該等綠色磷 光體區40係藉由實心正方形指示’該等撥色碟光體區⑽ ❹ 藉由交又斜線正方形指示,並且該等透明窗區28(即’不 包含磷光體材料之區)係藉由加框正方形指示。與圖物之 具體實施例形成對比,該等磷光體區之轉角彼此鄰接。如 所說明,綠色與橙色磷光體區係窗區的大約兩倍。方便的 系β亥鱗光體圖案係網版印刷於一透明基板上,不過應明 白可使用任何適合的沈積技術。熟習此項技術者應明白其 他鱗光體圖案,並且其他磷光體圖案將取決於所需照明產 物並可包括(例如)形狀為多邊形、三角形、矩形、六邊形 或不規則的窗區及/或填光體區。此外,該等窗區及/或填 135485.doc •20· 200929621 光體區可包含規則或不規則圖案。該油墨或油漆中的磷光 體之濃度、不同磷光體區之厚度與相對面積及該(等)窗區 之面積與幾何形狀可以係最佳化以針對發射的光之一所需 色彩實現最高光輸出效率。例如,在其他具體實施例中, 各麟光體區可經組態用以吸收100%的激發光。此外,應 明白為了產生一實質上均勻的照明產物,該等窗區與磷光 • 體區應係實質上均勻地分佈於該面板之光發射表面上。 在替代性具體實施例中,可使用該透明基板24之一表面 ® 拓撲來定義該磷光體圖案。在一配置中,該表面拓撲定義 一凹陷陣列以用於接收該一或多個磷光體材料。在此一配 置中’該透明基板係藉由精度模製來製造並且一預先選定 體積的磷光體/黏合劑混合物係使用(例如)如Asymtek所製 造之一奈升大小的活塞型分配器頭來分配至各凹陷中。此 外’該光發射面板之光發射表面34可額外包括一表面拓 撲,其疋義諸如一透鏡陣列或一透鏡結構的一或多個光學 φ 組件。同樣,可藉由該透明基板之精度模製來製造此一結 構。 圖5與6a分別係依據本發明之另一具體實施例的一邊緣 發光白色光發射發光面板51〇的透視圖與斷面示意圖.在 - 此說明書中,前面係對應一給定具體實施例之第一圖號的 類似參考數字係用以表示類似部分。例如,在圖5與6a 中’圖1之光發射磷光體面板14係表示為514。 在此具體實施例中’該光發射磷光體面板514用作一波 導(光導)媒體並導引來自邊緣發光單元5 12之led 520的激 135485.doc 21 - 200929621 發光522。該光發射磷光體面板5 14包含透明材料(例如一 丙烯酸材料)之一平面薄片524,該透明材料之尺寸係使得 在該面板之周邊邊緣周圍包括該等邊緣發光單元512的發 光面板會擬合至一標準懸吊天花板之一碑孔徑中。各邊緣 發光單元512皆包含藍色發射LED晶片520之一線性陣列, 該等晶片係沿一發光條536之長度來黏著。該發光條536提 供至該等LED晶片520的電連接與藉由將熱傳導至該發光 條之外表面的晶片之熱管理,該發光條可包括一系列散熱 片(未顯示)以辅助熱自該發光面板之輻射。該發光條536之 内表面(即,面向該透明波導524之邊緣的表面)可包括一反 射表面538以防止光自該平面波導524之邊緣逃逸。替代 地’該波導524之邊緣可包括一反射表面以最小化光自該 等邊緣的逃逸。在所說明的範例中,邊緣發光單元512係 沿兩個正交邊緣提供,不過在其他具體實施例中,其可沿 该平面波導薄片524之一個、兩個、三個或所有邊緣來提 供。在該波導524之光發射表面534(如所說明,此係上部 面)上,存在具有窗區域528之一陣列的麟光體材料526之 一層。在該波導524之下部面(即,導向支撐天花板之面) 上,存在咼度反射材料之一層540以確保實質上所有光係 自該光發射填光體面板514之光發射面5 3 4發射。 在操作中,藉由該等LED晶片520產生的激發光522(其 屬於一第一波長範圍λ!)係耦合至該平面波導524中並係在 該波導524之整個表面上予以導引。透過該上部面(光發射 表面)發射的光通過該填光體圖案中之一窗528或引起該填 135485.doc -22- 200929621 光體材料之激發,該磷光體材料重新發射一第二更長波長 範圍λ2之光530。包含該最終照明產物的自該光發射磷光 體面板514之上部面發射的光532係該激發光522與藉由該 磷光體發射之光530之一組合。一般而言,該照明產物將 係白色光’並且該磷光體層可包含綠色(5〇〇至54〇 nm)或 橙色(580至620 nm)發射磷光體或藉由該藍色激發光活化 的磷光體材料之一組合。藉由該面板51〇產生的光之相關 色溫(CCT)可藉由與磷光體區域相比較包含窗區域的光發 射面板之表面區域的比例與磷光體材料之數量、厚度及組 成物來選擇。在其他配置中,該面板可經組態用以藉由適 當選擇該磷光體材料、厚度及圖案來產生彩色光。 該波導524之光發射表面534可額外包括定義一或多個光 學組件(例如,透鏡之一陣列或透鏡結構)之一表面拓撲以 增強(促進)自該光發射表面之光發射及/或發射角度。在一 配置中’在沈積該磷光體圖案之前,以一互補圖案來雷射 切割該波導524之表面。在一替代性配置中,可精度模製 該波導以包括透鏡之一陣列或其他光學特徵,以促使光自 該波導之發射面射出。替代地,該波導之表面可包括該表 面之一粗糙化或該表面之一規則圖案化。 在其他配置中,如圖6b所說明,可使用一波導表面拓撲 來定義該磷光體/窗圖案以及促進光自該波導之光發射表 面的發射。在所示配置中,該平面波導524之光發射表面 534包括淺凹陷542之一陣列,其用於接收該磷光體材料 526。可藉由精度模製該透明基板524並接著使用(例如)如 135485.doc -23- 200929621
Asymtek所製造之一奈升大小的活塞型分配器頭來分配一 預先選疋體積的填光體/黏合劑混合物至各凹陷中來製造 該光發射磷光體面板5 14。替代地,可在該波導的整個光 發射表面上刷一磷光體/黏合劑混合物並接著以一撓性刀 片或輥(橡膠輥)來擦抹該表面以擦掉多餘磷光體材料,使 • 得磷光體材料僅保留在該等凹陷中。此外,該光發射鱗光 • 體面板514可包括透鏡544之一陣列或其他光學組件以聚焦 或以其他方式引導該發光面板之光發射532。 本發明之邊緣發光發光面板之一優點係該面板之小型性 質,尤其係總體厚度,其可與該光發射鱗光體面板514之 厚度相同(即,f»5至10 mm)。 雖然該發光面板5 1 0係說明為用於一懸吊天花板中,但 其亦可用於牆壁上,與天花板齊平,用作地板之一部分或 任何水平表面(例如櫃檯頂部)或其他平面表面(例如樓梯踏 板或豎板)。此外,該面板可用作一建築物之一結構組件 φ 之一部分或傢俱之部分。在樓梯踏板或豎板之情況下,該 波導較佳的係包含一層壓玻璃構造,其中該磷光體圖案係 併入插入層壓之一者内。除平坦面板發光以外,應明白可 按需要將該光發射面板製造為—彎曲表面或其他形式。 圖7係依據本發明之另一具體實施例之一反射器燈71〇的 部分剖面透視圖並旨在作為對一傳統河尺“型鹵素反射器 燈之一直接取代。該燈710包含具有一 GU10基底752之一 半球形反射器750並旨在用於電力幹線操作11〇至24〇 v AC (alternating current ;交流電)。應明白,可使用其他反射 135485.doc -24 - 200929621 器組態及/或基底,例如GU4、GU5·3、GX5.3、GY4及GZ4 反射器燈基底。在本發明之反射器燈71〇中,齒素燈泡係 藉由黏著於一散熱器754上的藍色發射LED晶片720之一陣 列所取代。驅動器電路756係裝載於該基底内以致能直接 自一電力幹線電源操作該等LED晶片。 β亥反射器燈710進一步包含一前蓋758,其覆蓋該反射器 • 750的開口。構成該燈之光發射表面734的前蓋758包含一 透明薄片(例如’ 一丙烯酸薄片),在其内部面(即,面向該 ® 等LED晶片之面)上具有磷光體材料之一層726。該磷光體 層(圖案)726包括窗728之一規則陣列(圊案),其不包括任 何麟光體材料。由於填光體發光之各向同性性質所致,藉 由該燈發射的光732將不具有一精確定義的光束圖案而與 當前反射器750無關。為了在一所需方向上準直及/或引導 該發射的光,該前蓋758可以係形成為一透鏡及/或在其外 表面上包括一透鏡結構。在一配置中,藉由(例如)精度模 φ 製該前蓋來在該蓋之外表面上定義一菲涅爾(Fresnel)透 鏡。如在其他具體實施例中,可使用該前蓋756之一表面(較 佳的係内表面)之一表面拓撲來定義該磷光體及/或窗圖案。 圖8係依據本發明之一燈泡81〇的部分剖面透視圖,其旨 • 在作為針對一傳統白熾燈泡之一直接取代。旨在用於電力 幹線操作110至240 V AC的燈泡810包含一透明包絡85〇與 E26‘準基底(螺絲連接器)86〇。應明白,可使用其他包 絡形狀及/或連接器,例如一插接連接器。在本發明至燈 /包810中,鎢絲配置係藉由黏著於一散熱器上的藍色發 135485.doc -25- 200929621 射LED晶片820之一陣列所取代。驅動器電路(未顯示)係裝 載於該螺絲連接器8 6 0内以致能直接自一電力幹線電源操 作該等LED晶片。 構成該燈泡之光發射表面834的包絡858較佳的係包含一 透明塑膠材料(例如,一丙烯酸材料)並在其整個表面上具 有磷光體材之一層826。該磷光體層826包括窗828之一圖 案(陣列)’其不包括任何磷光體材料《可在該包絡之内表 面或外表面上提供該磷光體層,不過為方便製造前者較 佳。因為該磷光體材料更容易提供於該包絡之外表面上, 故該燈泡較佳的係進一步包括覆蓋該磷光體層之一透明外 保護層(未顯示)。 圖9係依據本發明之另一具體實施例之一管狀燈91〇的部 分剖面透視示意圖。該燈910可用以取代一傳統管狀白織 燈泡或可用作對一螢光管之一替代物並旨在用於電力幹線 操作110至240 V AC。在此具體實施例中,該燈91〇係伸長 形式並包含一伸長外殼962,其裝載包含藍色lEd晶片920 之一線性陣列的一發光條964。該等LED晶片920係沿該發 光條964之長度相等地隔開以在該外殼内提供一實質上均 勻的照明。該發光條964與外殼962可由一導熱材料(金屬 或金屬負載的環氧樹脂/聚矽氧)製成並較佳的係彼此熱流 通以將藉由該4 LED晶片920產生的熱自該燈的後部導 出》該外殼的後部可進一步包括一系列散熱片(未顯示)以 輔助熱的有效消耗。驅動器電路(未顯示)係裝載於該外殼 内以致能經由連接引線966直接自一電力幹線電源操作該 135485.doc -26- 200929621 等LED晶片。 該燈910之光發射表面934包含具有沿其長度延伸之—開 口的一般管狀透明蓋950並係由一透明塑膠材料(例如一丙 烯酸材料)製成。該蓋在其整個表面上具有磷光體材料之 一層926並包括不包括任何磷光體材料的窗928之一圖案。 該蓋968之開放邊緣係黏著於該外殼962中並且不透明端蓋 970覆蓋該蓋之開放端以防止光自該燈之端逃逸。 應明白,本發明並不限於所說明的特定具體實施例並且 可進行在本發明之範疇内的變更。本發明之具體實施例係 關於具有一光發射表面的光發射裝置與發光系統,該光發 射表面包括一或多個磷光體材料與一或多個窗區域以允許 激發光與磷光體產生的光之發射。 該等磷光體區及/或窗區域之配置與相對比率可以係選 擇以實現發射的光之一所需色彩及/或色溫。為了確保在 該光發射表面之整個區域上產生一實質上均勻的色彩照明 產物’該等窗區域及/或磷光體區應係實質上均勻地分佈 於該光發射表面上。可將該光發射表面組態為一光傳輸或 一波導光學配置。在一配置中’該光發射表面包含一透明 膜’其上沈積鱗光體材料之一圖案。接著,可將此一膜施 加至現有光學組件之光發射表面。 為了進一步增強發射的光之色彩均勻度,該裝置可進一 步包括一光擴散層,其可(例如)包含承載光散射粒子(例如 二氧化矽)之一透明材料。 此外,雖然在所說明的範例中一單一色彩LED(較佳的 135485.doc -27· 200929621 ❹ e 係藍色)係既用作一磷光體激發源又用以供給光至該發射 產物’但在其他具體實施例中可設想使用兩個或兩個以上 不同色彩LED與一或多個磷光體材料之一組合以產生該需 要的光發射產物。例如’在旨在產生具有一高CRI(演色性 指數)的白色光之一配置中’藍色LED晶片係用以激發一綠 色磷光體材料而橙色或紅色LED晶片係用以產生最終發射 產物之橙色或紅色光成分。在此一配置中,該發射產物包 含紅色(R)、綠色(G)及藍色(B)成分。較佳的係,藍色led 與橙色及/或紅色LED晶片之比率係實質上二比一以確保該 綠色光供給足以實現一需要的CRh應明白,在此一配置 中,藉由該等橙色及/或紅色LED產生之光並不導致該磷光 體之激發並且此類光係發射透過該光發射磷光體表面中之 一或多個窗。在一替代性配置中,可使用藍色LED來激發 一橙色或紅色發射磷光體並且可使用一或多個綠色發射 LED晶片來供給綠色光至該發射產物。 【圖式簡單說明】 為了更佳地瞭解本發明 明的具體實施例,其中: 圖1係依據本發明之一 意圖; ,已參考附圖經由範例說明本發 彦光發光面板的部分分解透視示
2係圖1之背光發光面板透過一 圖, 平面AA的示意斷面 的依據本發明之一光發 圖3係用於圖1與2之發光面板中 射填光體面板; 135485.doc •28· 200929621 圖4a與4b係依據本發明之另外具體實施例的光發射磷光 體面板; 圖5係依據本發明之一邊緣發光發光面板的部分分解透 視不意圖; 圖6a係圖5之邊緣發光發光面板的示意斷面圖; 圖6b係依據本發明之另一態樣之一邊緣發光發光面板的 不意斷面圖;
圖7係依據本發明之一反射器燈的部分刮面透視圖; 圖8係依據本發明之一燈泡的部分剖面透視圖;以及 圖9係依據本發明之一管狀燈的部分剖面透視示意圖。 【主要元件符號說明】 10 發光面板 12 背光單元 14 光發射麟光體面板 16 光箱 18 光箱之内表面 20 發光二極體/激發源 22 光 24 透明基板 26 碟光體材料(光致發 28 窗區域 30 綠色光 32 照明產物 34 光發射表面 ❹ 135485.doc -29- 200929621 40 綠色磷光體區 42 橙色磷光體區 510 發光面板 512 邊緣發光單元 514 光發射磷光體面板 ' 520 LED晶片 • 522 激發光 524 波導/平面薄片/透明基板 ® 526 磷光體材料 528 窗區域 530 光 532 光 534 光發射面 536 發光條 538 反射表面 * 540 ❹ 局度反射材料層 542 凹陷 544 透鏡 ' 710 反射器燈 - 720 藍色發射LED晶片 726 磷光體材料層 728 窗 732 光 734 光發射表面 135485.doc -30- 200929621 ❹ 參 750 半球形反射器 752 基底 754 散熱器 756 驅動器電路 758 前蓋 810 燈泡 820 藍色發射LED晶片 826 磷光體材料層 828 窗 834 光發射表面 854 散熱器 858 包絡 860 E26標準基底(螺絲連接器) 910 管狀燈 920 藍色LED晶片 926 磷光體材料層 928 窗 934 光發射表面 962 伸長外殼 964 發光條 966 連接引線 968 蓋 970 不透明端蓋 135485.doc -31
Claims (1)
- 200929621 十、申請專利範園: 一種光發射裝置,其包含:至少一激發源,其可操作以 產生一第一波長範圍之激發光;及一光發射表面,其具 有至少一磷光體材料,該磷光體材料吸收該激發光之至 少一部分並發射一第二波長範圍之光,其中藉由該裝置 發射的光包含藉由該光發射表面發射的該等第一波長範 圍與第二波長範圍之組合光,其特徵為該光發射表面具 有不包括該至少一磷光體材料的至少一窗區域,該窗區 域對該等第一波長與第二波長之光係實質上透明。 2·如請求項1之光發射裝置’其中該光發射表面包含一基 板’其對該等第一波長與第二波長之光係實質上透明並 且在其一表面上具有該至少一磷光體材料。 3,如請求項2之光發射裝置’其中該至少一磷光體材料包 含鱗光體區之一陣列,其中磷光體區之間的間隙定義該 至少一窗區域。 4. 如請求項3之光發射裝置,其中該等磷光體區係分佈於 該光發射表面之實質上整個表面上。 5. 如請求項4之光發射裝置,其中該等磷光體區係實質上 均勻地分佈於該光發射表面上。 6·如請求項3之光發射裝置,其中該等磷光體區之形狀係 選自以下實質上形狀組成的群組:多邊形、正方形、圓 形、橢圓形、三角形及矩形。 7·如請求項2之光發射裝置,其中該至少一磷光體材料實 質上覆蓋該光發射表面並包括窗區域之一陣列。 135485.doc 200929621 8. 如請求項7之光發射裝置,其中該等窗區域係分佈於該 光發射表面之實質上整個表面上。 9. 如請求項8之光發射裝置’其中該等窗區域係實質上均 勻地分佈於該光發射表面上。 10. 如請求項7之光發射裝置,其中該等窗區域之形狀係選 自以下實質上形狀組成的群組:多邊形、正方形、圓 形、橢圓形、三角形及矩形。 11. 如請求項2之光發射裝置,其中該基板包含一波導媒體 且其中該激發源經組態用以將激發光耦合至該基板令。 12. 如請求項11之光發射裝置,其中該基板係實質上平面形 式且其中該激發光係耦合至該基板之一邊緣之至少一部 分中。 13. 如请求項12之光發射裝置,且其進一步包含在與該光發 射表面相對的該基板之表面之至少一部分上之一反射 14·如請求項12之光發射裝置,且其進一步包含具有用以促 進光自該光發射表面基板的發射之一表面拓撲的該基板 之該光發射表面。 15. 如請求項2之光發射裝置,且其進一步包含至少兩個不 同磷光體材料之一圖案。 16. 如請求項2之光發射裝置,其中該基板係選自以下材料 組成的群組:一丙烯酸、一聚碳酸酯、一聚乙烯及一玻 璃。 17. 如請求項1之光發射裝置,其中該至少一激發源包含一 135485.doc 200929621 藍色發光二極體。 18·如清求項17之光發射裝置’且其進一步包含至少一發光 一極體’其可插作以產生一第·=波長範圍之光,該光有 助於由該裝置藉由該光發射表面發射的光。 19. 如請求項18之光發射裝置,其中該至少一發光二極體可 操作以產生一第三波長範圍之光,其係選自以下光組成 的群組:橙色光、紅色光及綠色光。 20. 如請求項1之光發射裝置,其中該至少一磷光體材料係 選自由以下磷光體材料組成的群組:一以矽酸鹽為主的 磷光體;一以鋁酸鹽為主的磷光體;一以氮化物為主的 磷光體材料;一以硫酸鹽為主的磷光體材料;一以氮氧 化物為主的磷光體;一以硫酸氧鹽為主的磷光體;一石 榴石材料;一般組成物A3Si(OD)5之一以矽酸鹽為主的碟 光體,其中Si係矽、0係氧、A包含鳃(Sr)、鋇(Ba)、鎂 (Mg)或鈣(Ca)而D包含氣(C1)、氟(F)、氮(N)或硫(S); — 般組成物AjiCOD)4之一以矽酸鹽為主的磷光體,其中a 包含Sr、Ba、Mg或Ca而D包含Cl、F、N或S ;以及化學 式Mi.xEuxAlyO[1+3y/2]之一以鋁酸鹽為主的碟光體,其中 Μ係包含 Ba、Sr、Ca、Mg、Mn、Zn、Cu、Cd、Sm或録 (Tm)之一二價金屬之至少一者。 21. —種光發射裝置’其包含:一外殼’其具有一反射内表 面;至少一激發源,其係裝載於該外殼内並可操作以產 生一第一波長範圍之激發光;以及一光發射表面,其覆 蓋該外殼之該開口並具有至少一磷光體材料,該磷光體 135485.doc 200929621 材料吸收該激發光之至少一部分並發射一第二波長範圍 之光,其中藉由該裝置發射的光包含藉由該光發射表面 發射的該等第一波長範圍與第二波長範圍之組合光,其 特徵為該光發射表面具有不包括該至少一磷光體材料的 至少一區域,該區域對該等第一波長與第二波長之光係 實質上透明,從而允許激發光之一部分與反射的鱗光體 - 產生的光通過該光發射表面。 Ο 135485.doc
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-
2007
- 2007-10-17 US US11/975,130 patent/US7915627B2/en not_active Expired - Fee Related
-
2008
- 2008-10-16 JP JP2010530125A patent/JP2011501865A/ja active Pending
- 2008-10-16 WO PCT/US2008/080230 patent/WO2009052329A1/en active Application Filing
- 2008-10-16 EP EP08839401A patent/EP2201617A1/en not_active Withdrawn
- 2008-10-16 CN CN200880111717A patent/CN101828271A/zh active Pending
- 2008-10-16 KR KR1020107010597A patent/KR20100077199A/ko not_active Application Discontinuation
- 2008-10-16 CA CA2702436A patent/CA2702436A1/en not_active Abandoned
- 2008-10-17 TW TW097139987A patent/TW200929621A/zh unknown
- 2008-10-17 TW TW101119190A patent/TWI453946B/zh not_active IP Right Cessation
-
2011
- 2011-03-28 US US13/073,395 patent/US8188502B2/en active Active
-
2012
- 2012-05-25 US US13/481,565 patent/US8686449B2/en not_active Expired - Fee Related
-
2014
- 2014-04-01 US US14/242,827 patent/US20140299895A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10600939B2 (en) | 2010-12-02 | 2020-03-24 | Intematix, Corporation | Solid-state light emitting devices and signage with photoluminescence wavelength conversion and photoluminescent compositions therefor |
TWI460378B (zh) * | 2012-05-09 | 2014-11-11 | 國立中央大學 | Light emitting diode light mixing elements |
US9318670B2 (en) | 2014-05-21 | 2016-04-19 | Intematix Corporation | Materials for photoluminescence wavelength converted solid-state light emitting devices and arrangements |
Also Published As
Publication number | Publication date |
---|---|
US8188502B2 (en) | 2012-05-29 |
US20110170277A1 (en) | 2011-07-14 |
JP2011501865A (ja) | 2011-01-13 |
TW201246597A (en) | 2012-11-16 |
KR20100077199A (ko) | 2010-07-07 |
WO2009052329A1 (en) | 2009-04-23 |
TWI453946B (zh) | 2014-09-21 |
EP2201617A1 (en) | 2010-06-30 |
US20140299895A1 (en) | 2014-10-09 |
CA2702436A1 (en) | 2009-04-23 |
US8686449B2 (en) | 2014-04-01 |
US7915627B2 (en) | 2011-03-29 |
CN101828271A (zh) | 2010-09-08 |
US20090101930A1 (en) | 2009-04-23 |
US20120299032A1 (en) | 2012-11-29 |
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