JP2013539916A - フォトルミネッセンス波長変換を備える固体発光装置及びサイネージ - Google Patents
フォトルミネッセンス波長変換を備える固体発光装置及びサイネージ Download PDFInfo
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- 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
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
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- 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
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- H01L33/50—Wavelength conversion elements
- H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F21V3/00—Globes; Bowls; Cover glasses
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Abstract
Description
本発明のいくつかの実施形態は、固体発光素子によって発生した光を所望の光の色に変換するためのフォトルミネッセンス波長変換を使用する固体発光装置及びサイネージ(signage)に関する。
白色光を放出するLED(「白色LED」)は、従来技術において公知で、比較的最近の技術革新である。長い動作寿命(>50,000時間)及び高い発光効率(ワット当たり70ルーメン以上)のため、従来の蛍光、小型蛍光及び白熱光源と入れ替わって、高輝度の白色LEDがますます使用されてきている。
本発明の実施形態は、1つ以上の固体発光素子、通常はLEDを含んだ固体発光装置及びサイネージに関する。この固体発光素子は、青色光励起可能なフォトルミネセント(例えば蛍光体材料)の粒子を含有したフォトルミネッセンス波長変換コンポーネント又はフォトルミネッセンス光放出サイネージ面を励起するために使用される青色光を発生させるために、動作可能である。そして、本発明のいくつかの実施形態によれば、蛍光体材料、波長変換コンポーネント及び/又はサイネージ面によるフォトルミネッセンス発光を増加させることは、蛍光体材料と共に光反射材料(本明細書では「光散乱材料」とも呼ぶ)の粒子を組み込むことを更に含む。強化された発光は、蛍光体材料の粒子とLEDが発生させた光との衝突数を増加させる光反射材料からもたらされ、これが、放出が作る色の選択を発生させるための蛍光体材料の使用量を減少させる。
本発明のいくつかの実施形態は、通常はLEDである、1つ以上の固体発光素子を含む発光装置を目的とし、この発光素子は、青色光励起可能な蛍光体材料といった、フォトルミネッセンス材料(例えば、蛍光体材料)の粒子を収容する、波長変換コンポーネントを励起するために使用される(通常は青色の)励起光を発生させるために、動作可能である。加えて、波長変換コンポーネントは、蛍光体材料によるフォトルミネッセンス発光を強化するために、蛍光体材料と共に組み込まれた光反射材料(本明細書では「光散乱材料」とも呼ぶ)の粒子を含む。強化された発光は、発光素子(単数又は複数)によって発生した光の、蛍光体材料の粒子との衝突数を増加させる光反射材料に起因する。最終結果として、発光装置のための蛍光体材料使用の減少がもたらされる。
装置10は、青色光を放出しているLED12及びLEDに対して離れて配置されたフォトルミネッセンス波長変換コンポーネント14を含む。示されるように、波長変換コンポーネント14は、少なくとも1つの面に蛍光体変換層18を有した光透過性窓(基板)16を含むことができる。蛍光体変換層18は、青色光励起可能な蛍光体材料20の粒子、光反射材料22の粒子及び光透過性バインダ材料24の混合物を含む。光透過性窓16は、例えばポリカーボネート、アクリル、シリコーン若しくはエポキシといったポリマー材料、又は、石英ガラスなどのガラスといった、任意の光透過性材料を含むことができる。通常、製造の簡略化のために、光透過性窓16は平面、多くの場合円盤形状であるが、所期の用途に応じて、正方形、長方形又は他の形状とすることができる。光透過性窓が円盤形状の場合には、直径を約1cmと10cmの間、つまり0.8cm2と80cm2の間の面積の光学的開口とすることができる。代替的な実施形態では、光透過性窓16が、例えば凸面又は凹面レンズなどの選択された方向に光を向ける光学コンポーネントを含むことが想定される。LED12から波長変換コンポーネント14までの熱伝達、特に蛍光体材料への熱伝達を減少させるために、波長変換コンポーネントは、LEDに対して離れて配置、つまり、物理的に少なくとも5mmの距離Lで隔てられる。本発明の実施形態は、発光素子から蛍光体材料までの熱伝達を減少するために、波長変換コンポーネント及び、更に重要なことには、蛍光体材料が、LEDに対して離れて提供される装置に関する。本出願に関連して、遠隔とは、例えば空隙又は光透光性媒体によって、物理的に分離されることを意味する。遠隔蛍光体装置では、LED(例えば0.03cm2)の光放出面の面積より非常に大きな面積(例えば0.8cm2から80cm2)に渡って、蛍光体材料が、分布することが理解される。通常、蛍光体材料は、LEDの光放出面積の少なくとも50倍、通常は少なくとも100倍となる面積に渡って分布する。
図6の実施形態は、LED照明26を蛍光体変換層18へ誘導するために使用される光透過性基板16を有する図7の実施形態に、動作に関して類似していることが理解される。
Claims (24)
- 励起光を発生させるために動作可能な少なくとも1つの固体発光素子と、
少なくとも1つのフォトルミネッセンス材料の粒子及び光反射材料の粒子の混合物を含むフォトルミネッセンス波長変換コンポーネントと、
を含む発光装置。 - フォトルミネッセンス材料及び光反射材料の混合物が分布する面積が、発光素子の光放出面積の少なくとも50倍である、請求項1に記載の発光装置。
- 波長変換コンポーネントが、少なくとも1つの発光素子から少なくとも5mmの距離に配置可能である、請求項1に記載の発光装置。
- 光反射材料が、0.01μmから10μm、0.01μmから1μm及び0.1μmから1μmからなる群から選択される範囲の粒子寸法を有する、請求項1に記載の発光装置。
- 少なくとも1つのフォトルミネッセンス材料に対する光反射材料の装填量の重量パーセントが、0.01%から10%、0.01%から1%、0.1%から1%及び0.5%から1%からなる群から選択される範囲にある、請求項1に記載の発光装置。
- 光反射材料が、酸化マグネシウム、二酸化チタン、硫酸バリウム及びこれらの組み合わせからなる群から選択される、請求項1に記載の発光装置。
- 波長変換コンポーネントが、フォトルミネッセンス材料及び光反射材料の混合物が少なくとも1層提供される光透過性基板、光ガイドとして構成され、フォトルミネッセンス材料及び光反射材料の混合物が光ガイドの面の少なくとも一部の上に提供される光透過性基板、ボリューム全体に渡って均一に分布したフォトルミネッセンス材料及び光反射材料の混合物を有する光透過性基板、並びに、フォトルミネッセンス材料及び光反射材料の混合物が少なくとも1層提供される光反射面からなる群から選択される、請求項1に記載の発光装置。
- 少なくとも1つの固体発光素子が、波長範囲440nmから480nmでピーク波長を有する青色励起光を発生させるために動作可能なLEDを含む、請求項1に記載の発光装置。
- フォトルミネッセンス材料及び光反射材料の混合物が、少なくとも0.8cm2の面積に渡って分布する、請求項1に記載の発光装置。
- 光反射材料の粒子が、少なくとも1つの蛍光体材料によって発生する光より励起光を比較的多く粒子が散乱させるような粒子寸法に相当する、請求項1に記載の発光装置。
- フォトルミネッセンス波長変換コンポーネントに隣接した光拡散層を更に含む、請求項1に記載の発光装置。
- 光拡散層が、少なくとも1つのフォトルミネッセンス材料によって発生する光より励起光を比較的多く粒子が散乱させるような粒子寸法に相当する光反射材料の粒子を含む、請求項11に記載の発光装置。
- 光反射材料が、100nmから150nmの範囲の粒子寸法を有する、請求項12に記載の発光装置。
- 少なくとも1つのフォトルミネッセンス材料が、蛍光体又は量子ドットを含む、請求項1に記載の発光装置。
- 光放出サインとして構成される、請求項1に記載の発光装置。
- 少なくとも1つのフォトルミネッセンス材料の粒子及び光反射材料の粒子の混合物を含む、固体発光装置のための波長変換コンポーネント。
- 光反射材料が、0.01μmから10μm、0.01μmから1μm及び0.1から1μmからなる群から選択される範囲の粒子寸法を有する、請求項16に記載の波長変換コンポーネント。
- 少なくとも1つのフォトルミネッセンス材料に対する光反射材料の装填量の重量パーセントが、0.01%から10%、0.01%から1%、0.1%から1%及び0.5%から1%からなる群から選択される範囲にある、請求項16に記載の波長変換コンポーネント。
- 波長変換コンポーネントが、少なくとも1つのフォトルミネッセンス材料及び光反射材料の混合物が少なくとも1層提供される光透過性基板、光ガイドとして構成され、フォトルミネッセンス材料及び光反射材料の混合物が光ガイドの面の少なくとも一部の上に提供される光透過性基板、ボリューム全体に渡って均一に分布したフォトルミネッセンス材料及び光反射材料の混合物を有する光透過性基板、並びに、フォトルミネッセンス材料及び光反射材料の混合物が少なくとも1層提供される光反射面からなる群から選択される、請求項16に記載の波長変換コンポーネント。
- 少なくとも1つのフォトルミネッセンス材料及び光反射材料の混合物が、少なくとも0.8cm2の面積を渡って分布する、請求項16に記載の波長変換コンポーネント。
- 光反射材料の粒子が、少なくとも1つの蛍光体材料によって発生する光より励起光を比較的多く粒子が散乱させるような粒子寸法に相当する、請求項16に記載の波長変換コンポーネント。
- 光反射材料が、100nmから150nmの範囲の粒子寸法を有する、請求項21に記載の波長変換コンポーネント。
- フォトルミネッセンス波長変換コンポーネントに隣接した光拡散層を更に含む、請求項16に記載の波長変換コンポーネント。
- 光反射層が、少なくとも1つの蛍光体材料によって発生する光より励起光を比較的多く粒子が散乱させるような粒子寸法に相当する光反射材料の粒子を含む、請求項23に記載の波長変換コンポーネント。
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WO2012047937A1 (en) | 2012-04-12 |
US20120086034A1 (en) | 2012-04-12 |
US8610340B2 (en) | 2013-12-17 |
TWI674453B (zh) | 2019-10-11 |
CN103155024B (zh) | 2016-09-14 |
JP6069205B2 (ja) | 2017-02-01 |
KR20130139938A (ko) | 2013-12-23 |
TW201232094A (en) | 2012-08-01 |
TW201546519A (zh) | 2015-12-16 |
CN103155024A (zh) | 2013-06-12 |
US20140217427A1 (en) | 2014-08-07 |
TWI504968B (zh) | 2015-10-21 |
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