WO2007130858A1 - Methods of making led extractor arrays - Google Patents

Methods of making led extractor arrays Download PDF

Info

Publication number
WO2007130858A1
WO2007130858A1 PCT/US2007/067611 US2007067611W WO2007130858A1 WO 2007130858 A1 WO2007130858 A1 WO 2007130858A1 US 2007067611 W US2007067611 W US 2007067611W WO 2007130858 A1 WO2007130858 A1 WO 2007130858A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
extractors
extractor
cavities
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2007/067611
Other languages
English (en)
French (fr)
Inventor
Amy S. Barnes
Anatoly Z. Rosenflanz
Catherine A. Leatherdale
Andrew J. Ouderkirk
Jacqueline C. Rolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to CN2007800160352A priority Critical patent/CN101438202B/zh
Priority to JP2009509971A priority patent/JP2009535856A/ja
Priority to EP07761437A priority patent/EP2018591A4/en
Publication of WO2007130858A1 publication Critical patent/WO2007130858A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/09—Other methods of shaping glass by fusing powdered glass in a shaping mould
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array

Definitions

  • the present invention relates generally to light emitting diodes (LEDs), and in particular to optical components or elements used to extract light generated within an LED die.
  • LEDs light emitting diodes
  • Both encapsulants and extractors can be used to reduce the amount of wasted light and improve brightness. They do this by providing a light-transmissive material at the surface of the LED die whose refractive index (n) is closer to that of the die than air, reducing the refractive index mismatch at the interface and increasing the span of the escape cone. The closer n is to the refractive index of the die, the less light is wasted inside the die, and the brighter the LED can shine.
  • amorphous material refers to material derived from a melt and/or a vapor phase that lacks any long range crystal structure as determined by X-ray diffraction and/or has an exothermic peak corresponding to the crystallization of the amorphous material as determined by a differential thermal analysis (DTA);
  • DTA differential thermal analysis
  • the mold 60 After the mold 60 has been prepared, it is filled with a plurality of glass particles 64.
  • filled means that at least some of the cavities 62, and preferably substantially all of the cavities 62, are either full or only partially full of the particles.
  • the particles 64 may be spherical or non-spherical, as discussed further below.
  • the particles 64 may also have a narrow, uniform size distribution, or may have a wider distribution of (nonuniform) sizes.
  • the particles 64 are shown to have an average size or volume that is substantially less than the volume of a given cavity 62. Note that if the cavities 64 have unequal volumes, the average particle size can be substantially less than the average cavity volume. Other cases are discussed below.
  • This heating and cooling profile caused the glass particles to soften and deform within their respective cavities and then solidify to form extractors.
  • the tops and bottoms of the extractors corresponding respectively to the 2.9 mm diameter opening and the 0.56 mm diameter bottom surface of the cavities, exhibited curvature that was believed to be due to surface tension of the molten glass coupled with the absence of any applied pressure.
  • the extractors were observed to be light-transmissive, but somewhat hazy or light-scattering possibly as the result of the reducing atmosphere. Desirably, the extractors would undergo the following additional processing steps.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Led Device Packages (AREA)
PCT/US2007/067611 2006-05-03 2007-04-27 Methods of making led extractor arrays Ceased WO2007130858A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2007800160352A CN101438202B (zh) 2006-05-03 2007-04-27 制造led提取器阵列的方法
JP2009509971A JP2009535856A (ja) 2006-05-03 2007-04-27 Ｌｅｄ光取り出し部材アレイの作製方法
EP07761437A EP2018591A4 (en) 2006-05-03 2007-04-27 METHOD FOR MANUFACTURING LED EXTRACTING ARRAYS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/381,512 US8141384B2 (en) 2006-05-03 2006-05-03 Methods of making LED extractor arrays
US11/381,512 2006-05-03

Publications (1)

Publication Number Publication Date
WO2007130858A1 true WO2007130858A1 (en) 2007-11-15

Family

ID=38659994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/067611 Ceased WO2007130858A1 (en) 2006-05-03 2007-04-27 Methods of making led extractor arrays

Country Status (7)

Country Link
US (1) US8141384B2 (https=)
EP (1) EP2018591A4 (https=)
JP (1) JP2009535856A (https=)
KR (1) KR20090008311A (https=)
CN (1) CN101438202B (https=)
TW (1) TW200809256A (https=)
WO (1) WO2007130858A1 (https=)

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Also Published As

Publication number Publication date
EP2018591A4 (en) 2009-11-11
JP2009535856A (ja) 2009-10-01
TW200809256A (en) 2008-02-16
CN101438202B (zh) 2010-08-18
CN101438202A (zh) 2009-05-20
EP2018591A1 (en) 2009-01-28
US20070256453A1 (en) 2007-11-08
KR20090008311A (ko) 2009-01-21
US8141384B2 (en) 2012-03-27

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