GB1423012A - Light emitting devices - Google Patents

Light emitting devices

Info

Publication number
GB1423012A
GB1423012A GB2012775A GB2012775A GB1423012A GB 1423012 A GB1423012 A GB 1423012A GB 2012775 A GB2012775 A GB 2012775A GB 2012775 A GB2012775 A GB 2012775A GB 1423012 A GB1423012 A GB 1423012A
Authority
GB
United Kingdom
Prior art keywords
feb
light
front face
lens formation
lead
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.)
Expired
Application number
GB2012775A
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co Ltd
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
Priority claimed from CA108873A external-priority patent/CA921172A/en
Priority claimed from US00229140A external-priority patent/US3821590A/en
Application filed by Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Publication of GB1423012A publication Critical patent/GB1423012A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/20—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
    • 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
    • H01L33/60—Reflective elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Electroluminescent Light Sources (AREA)
  • Led Device Packages (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

1423012 Electroluminescence NORTHERN ELECTRIC CO Ltd 22 Feb 1973 [22 Feb 1972 24 Feb 1972] 20127/75 Divided out of 1423011 Heading C4S [Also in Divisions F4 and H1] A light-emitting device comprises a semiconductor electroluminescent element (e.g. PN- element 2) mounted at the focus of a parabolic reflector 10, and transparent insulating encapsulant 14 with polylenticular lens formation on the front face, each cavity having an arcuate part-spherical inner portion and a conical outer portion. The lens formation comprises a plurality of concavities forming one or more series of identical shapes. The visual appearance comprises a plurality of bright spots filling the desired shape. An optical filter improves contrast. PN device 2 may be GaP : Zn, O, and the reflector provides electrical contact to lead 13. Wire 16 connects to positive lead 17. The sequence of assembly is outlined and the lamps are preferably moulded with the front face down so that any imperfections occur on the back part. Inclined peripheral portion 18 causes a small portion of the light to emerge at approximately 90 degrees to the vertical axis of the lamp. Pedestal 11 ensures light is not reflected on to the central part of face 12 already illuminated directly. If s/c element 1 emits non- visibly (e.g. in the infra-red), then an upconverting phosphor may be coated directly on the s/c element, or by coating on a further support. Indicator and signal lamp applications are instanced. Reference is made to PN junctions 0À015 inches square.
GB2012775A 1972-02-22 1973-02-22 Light emitting devices Expired GB1423012A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA108873A CA921172A (en) 1972-02-22 1972-02-22 Encapsulated solid state light emitting device
US00229140A US3821590A (en) 1971-03-29 1972-02-24 Encapsulated solid state light emitting device
GB2012675A GB1423013A (en) 1972-02-22 1973-02-22 Light emitting devices

Publications (1)

Publication Number Publication Date
GB1423012A true GB1423012A (en) 1976-01-28

Family

ID=39339231

Family Applications (3)

Application Number Title Priority Date Filing Date
GB2012775A Expired GB1423012A (en) 1972-02-22 1973-02-22 Light emitting devices
GB2012675A Expired GB1423013A (en) 1972-02-22 1973-02-22 Light emitting devices
GB882973A Expired GB1423011A (en) 1972-02-22 1973-02-22 Light emitting devices

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB2012675A Expired GB1423013A (en) 1972-02-22 1973-02-22 Light emitting devices
GB882973A Expired GB1423011A (en) 1972-02-22 1973-02-22 Light emitting devices

Country Status (2)

Country Link
GB (3) GB1423012A (en)
NL (1) NL7302483A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0362993A2 (en) * 1988-10-05 1990-04-11 Hewlett-Packard Company Nonimaging light source

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531295A1 (en) * 1995-08-25 1997-02-27 Reitter & Schefenacker Gmbh Optic body for at least one LED
JP2909023B2 (en) * 1996-05-01 1999-06-23 日吉電子株式会社 Long light emitting device
IT1303544B1 (en) * 1998-08-28 2000-11-14 Fiat Ricerche VEHICLE HEADLAMP PARTICULARLY FOR MOPED.
US6350041B1 (en) 1999-12-03 2002-02-26 Cree Lighting Company High output radial dispersing lamp using a solid state light source
AU2002365761A1 (en) * 2001-11-16 2003-06-17 Toyoda Gosei Co., Ltd. Light-emitting diode, led light, and light apparatus
US10340424B2 (en) 2002-08-30 2019-07-02 GE Lighting Solutions, LLC Light emitting diode component
DE102005009066A1 (en) 2005-02-28 2006-09-07 Osram Opto Semiconductors Gmbh Method for producing an optical and a radiation-emitting component and optical and radiation-emitting component
US9412926B2 (en) 2005-06-10 2016-08-09 Cree, Inc. High power solid-state lamp
EP1969633B1 (en) 2005-12-22 2018-08-29 Cree, Inc. Lighting device
US8593040B2 (en) 2009-10-02 2013-11-26 Ge Lighting Solutions Llc LED lamp with surface area enhancing fins
US8562161B2 (en) 2010-03-03 2013-10-22 Cree, Inc. LED based pedestal-type lighting structure
US8632196B2 (en) 2010-03-03 2014-01-21 Cree, Inc. LED lamp incorporating remote phosphor and diffuser with heat dissipation features
US10451251B2 (en) 2010-08-02 2019-10-22 Ideal Industries Lighting, LLC Solid state lamp with light directing optics and diffuser
US9068701B2 (en) 2012-01-26 2015-06-30 Cree, Inc. Lamp structure with remote LED light source
US9234655B2 (en) 2011-02-07 2016-01-12 Cree, Inc. Lamp with remote LED light source and heat dissipating elements
US11251164B2 (en) 2011-02-16 2022-02-15 Creeled, Inc. Multi-layer conversion material for down conversion in solid state lighting
US9488359B2 (en) 2012-03-26 2016-11-08 Cree, Inc. Passive phase change radiators for LED lamps and fixtures
US9500355B2 (en) 2012-05-04 2016-11-22 GE Lighting Solutions, LLC Lamp with light emitting elements surrounding active cooling device
US9360188B2 (en) 2014-02-20 2016-06-07 Cree, Inc. Remote phosphor element filled with transparent material and method for forming multisection optical elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0362993A2 (en) * 1988-10-05 1990-04-11 Hewlett-Packard Company Nonimaging light source
EP0362993A3 (en) * 1988-10-05 1991-04-10 Hewlett-Packard Company Nonimaging light source

Also Published As

Publication number Publication date
GB1423013A (en) 1976-01-28
NL7302483A (en) 1973-08-24
GB1423011A (en) 1976-01-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee