JP2005537651A - 効率が向上した被覆led - Google Patents
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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
- H01L33/58—Optical field-shaping elements
-
- 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
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- 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
- H01L33/44—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 coatings, e.g. passivation layer or anti-reflective coating
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
- Led Devices (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
【解決手段】 LEDチップと、チップによって発せられた放射光の少なくとも一部を可視光線に変換するための蛍光蛍光体の均一厚み層で被覆してチップから離して配置されたレンズとを含むLED装置。LEDから離れた位置に蛍光体層を配置すると、装置の効率が向上し、より一定した演色が得られる。レンズの表面積は、LEDチップの表面積の少なくとも10倍であることが好ましい。効率を増すために、反射体及びサブマウントも蛍光体で被覆し、内部吸収を更に低減することができる。
Description
3=上部蛍光体被覆面
2=下部蛍光体被覆面
1=反射体及びサブマウント
0=青色又はUV発光チップ
R=Rsub+(1−Rsub)2exp(−2asubtsub)Ract+(1−Rsub)2exp(−2asubtsub)(1−Ract)2exp(−2aacttact)Rmst...
ここで、Rsub=基板の反射率、Ract=活性層の反射率、asub=基板の吸収係数、aact=活性層の吸収係数、tsub=基板の厚み、及び、tact=活性層の厚み。
R=((n1−n2)2+k2)/(n1+n2)2+k2)
ここで、k=λa/2TTである。
112 LEDチップ
114 サブマウント
116 反射体
118 レンズ
124 蛍光体層
Claims (36)
- 発光半導体と、
前記半導体を覆い、それから間隔を空けて配置された透明レンズと、
前記レンズの内面又は外面内に含まれるか又はそこに被覆された蛍光体層と、
を含むことを特徴とするLED装置。 - 前記レンズの前記内面は、前記発光半導体の露出表面積の少なくとも10倍の表面積を有することを特徴とする請求項1に記載のLED装置。
- 前記発光半導体と前記レンズの間に配置された透明充填材を更に含むことを特徴とする請求項1に記載のLED装置。
- 前記透明充填材は、エポキシ、シリコーン、アクリル、熱可塑性材料、ウレタン、ポリイミド、又は屈折率修正マッチング流体又はゲルとすることができる光結合材料であることを特徴とする請求項3に記載のLED装置。
- 前記充填材は、前記発光半導体及び前記レンズ材料の屈折率の幾何平均と密接に適合する屈折率を有することを特徴とする請求項4に記載のLED装置。
- 前記蛍光体層は、実質的に均一な厚みを有することを特徴とする請求項1に記載のLED装置。
- 前記蛍光体層は、1つ又はそれ以上の蛍光体と結合剤とを含むスラリで形成されることを特徴とする請求項1に記載のLED装置。
- 前記蛍光体層は、1つ又はそれ以上の蛍光体と、散乱媒体と、結合剤とを含むスラリで形成されることを特徴とする請求項1に記載のLED装置。
- 前記スラリは、キャリア溶剤を含むことができ、
前記結合剤は、透明な屈折率マッチング材料である、
ことを特徴とする請求項7に記載のLED装置。 - 前記溶剤は、メチルエチルケトンであり、
前記結合剤は、シリコーン、アクリル、エポキシ、熱可塑性材料、及びポリイミドから成る群から選択される、
ことを特徴とする請求項9に記載のLED装置。 - 前記蛍光体層は、Y3Al5O2:Ce、Tb3Al4.9O12:Ce、Sr4Al14O25:Eu、及びその混合物の1つ又はそれ以上を含むことを特徴とする請求項1に記載のLED装置。
- 前記発光半導体は、一次放射の範囲が200〜480nmの青色発光LED又はUV発光LEDであることを特徴とする請求項1に記載のLED装置。
- 白色光を発することを特徴とする請求項1に記載のLED装置。
- 70%又はそれ以上のパッケージ効率を有することを特徴とする請求項1に記載のLED装置。
- 前記レンズは、球又は半球を含み、
前記発光半導体は、前記球又は半球の中央に配置される、
ことを特徴とする請求項1に記載のLED装置。 - 発光半導体と、
前記半導体を覆い、該発光半導体の最長辺の長さの少なくとも約2倍の距離によって該発光半導体から離して配置された透明レンズと、
前記レンズの内面又は外面内に含まれるか又はそこに被覆された蛍光体層と、
を含むことを特徴とするLED装置。 - 発光半導体と、
前記発光半導体を支持する反射体と、
前記半導体及び前記反射体を覆い、該半導体から間隔を空けて配置された透明レンズと、
前記反射体の少なくとも一部分に被覆され、前記レンズの内面又は外面内に含まれるか又はそこに被覆された均一厚みの蛍光体層と、
を含むことを特徴とするLED装置。 - 前記蛍光体層と前記反射体の間に配置された反射層を更に含むことを特徴とする請求項17に記載のLED装置。
- 前記反射層は、高誘電性粉体を含むことを特徴とする請求項18に記載のLED装置。
- 前記半導体が装着されたサブマウントを更に含み、
前記サブマウントはまた、前記蛍光体層で被覆される、
ことを特徴とする請求項17に記載のLED装置。 - 前記蛍光体層は、6から100μm厚であることを特徴とする請求項17に記載のLED装置。
- 前記半導体は、200〜480nmの範囲の青色又はUV発光LEDであることを特徴とする請求項17に記載のLED装置。
- 70%又はそれ以上のパッケージ効率を有することを特徴とする請求項17に記載のLED装置。
- 前記LEDチップには、前記蛍光体コーティングがないことを特徴とする請求項17に記載のLED装置。
- 均一の蛍光体コーティングを備えたレンズを有するLED装置を形成する方法であって、
支持体に装着したLEDを準備する段階と、
前記支持体の上又はその回りに適合する大きさの透明レンズを準備する段階と、
均一厚みの蛍光体コーティングを前記レンズの表面上に配置する段階と、
前記LED、マウント、及びレンズを組み付けてLED装置を形成する段階と、
を含むことを特徴とする方法。 - 前記蛍光体を前記レンズ上に配置する前記段階は、
蛍光体の粉体と、溶剤と、結合剤とを含むスラリを形成し、
任意的に、前記レンズを室温を超える温度まで加熱し、
均一厚みのコーティング層を達成するために、前記レンズ上に前記スラリをスタンプ、スクリーン、ディスペンス、ロール、ブラシ、又はスプレーし、
永久的なコーティング層を形成するために前記結合剤を硬化させる、
副段階を含むことを特徴とする請求項25に記載の方法。 - 前記スラリは、複数のパスを用いる加圧スプレー法を使用して前記レンズ上にスプレーされることを特徴とする請求項26に記載の方法。
- 前記溶剤は、トルエン、メチルエチルケトン、塩化メチレン、及びその混合物から成る群から選択されることを特徴とする請求項26に記載の方法。
- 前記結合剤は、シリコーン、エポキシ、熱可塑性材料、アクリル、ポリイミド、及びその混合物から成る群から選択されることを特徴とする請求項26に記載の方法。
- 前記蛍光体コーティングは、約6から約200μmの厚みを有することを特徴とする請求項25に記載の方法。
- 反射性電気的相互接続基板上に装着した複数の発光半導体と、
前記半導体を覆い、該半導体から間隔を空けて配置された透明レンズと、
前記レンズの内面又は外面内に含まれるか又はそこに被覆された蛍光体層と、
を含むことを特徴とするLED装置。 - 前記レンズは、光抽出及びチップ保護の向上のために前記発光半導体の屈折率に符合する屈折率を有することを特徴とする請求項31に記載のLED装置。
- 前記複数の発光半導体は、青色LEDを含み、
前記蛍光体層と前記青色LEDの間で前記レンズ上に配置され、該LEDの発光波長を通して該蛍光体層の発光波長を反射するように機能する帯域通過光フィルタ、
を更に含むことを特徴とする請求項31に記載のLED装置。 - 前記複数の発光半導体は、紫外線LEDを含み、
前記蛍光体層と前記青色LEDの間で前記レンズ上に配置され、該LEDの発光波長を通して該蛍光体層の発光波長を反射するための第1の帯域通過光フィルタと、
前記レンズの外面上に配置され、前記蛍光体の発光波長を通して前記LEDの発光波長を反射するための第2の帯域通過光フィルタと、
を更に含むことを特徴とする請求項31に記載のLED装置。 - 前記レンズの前記外面上にミクロ又はマクロレンズのアレイを形成して、放出した放射光の放射角度、方向、又は強度を制御することを特徴とする請求項31に記載のLED装置。
- 前記レンズは、光の色温度、CIE、及びCRIを前記発光半導体を換えることなく容易に調節するために、異なる蛍光体混合又は量を含有する付加的なレンズを取り付けることができるように、LED装置から容易に取外し可能であることを特徴とする請求項31に記載のLED装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US40742602P | 2002-08-30 | 2002-08-30 | |
PCT/US2003/027363 WO2004021461A2 (en) | 2002-08-30 | 2003-08-29 | Phosphor-coated led with improved efficiency |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005537651A true JP2005537651A (ja) | 2005-12-08 |
JP2005537651A5 JP2005537651A5 (ja) | 2006-10-12 |
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Application Number | Title | Priority Date | Filing Date |
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JP2004532037A Pending JP2005537651A (ja) | 2002-08-30 | 2003-08-29 | 効率が向上した被覆led |
Country Status (10)
Country | Link |
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US (1) | US7479662B2 (ja) |
EP (1) | EP1540746B1 (ja) |
JP (1) | JP2005537651A (ja) |
KR (1) | KR100622209B1 (ja) |
CN (1) | CN100468791C (ja) |
AT (1) | ATE448571T1 (ja) |
AU (1) | AU2003270052B2 (ja) |
DE (1) | DE60330023D1 (ja) |
ES (1) | ES2335878T3 (ja) |
WO (1) | WO2004021461A2 (ja) |
Cited By (27)
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- 2003-08-29 JP JP2004532037A patent/JP2005537651A/ja active Pending
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Also Published As
Publication number | Publication date |
---|---|
ATE448571T1 (de) | 2009-11-15 |
US20070120135A1 (en) | 2007-05-31 |
AU2003270052A1 (en) | 2004-03-19 |
CN100468791C (zh) | 2009-03-11 |
CN1836339A (zh) | 2006-09-20 |
ES2335878T3 (es) | 2010-04-06 |
WO2004021461A3 (en) | 2004-09-30 |
EP1540746A2 (en) | 2005-06-15 |
KR20050046742A (ko) | 2005-05-18 |
WO2004021461A2 (en) | 2004-03-11 |
US7479662B2 (en) | 2009-01-20 |
EP1540746B1 (en) | 2009-11-11 |
AU2003270052B2 (en) | 2009-02-19 |
DE60330023D1 (de) | 2009-12-24 |
KR100622209B1 (ko) | 2006-09-19 |
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