GB1423011A - Light emitting devices - Google Patents

Light emitting devices

Info

Publication number
GB1423011A
GB1423011A GB882973A GB882973A GB1423011A GB 1423011 A GB1423011 A GB 1423011A GB 882973 A GB882973 A GB 882973A GB 882973 A GB882973 A GB 882973A GB 1423011 A GB1423011 A GB 1423011A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
light
reflector
feb
element
visible
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
GB882973A
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
Nortel Networks 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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier 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
    • H01L33/58Optical field-shaping elements
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/04Sealing arrangements, e.g. against humidity
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/12Light sources with substantially two-dimensional radiating surfaces
    • H05B33/20Light 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
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/12Light sources with substantially two-dimensional radiating surfaces
    • H05B33/22Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier 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
    • H01L33/58Optical field-shaping elements
    • H01L33/60Reflective elements

Abstract

1423011 Electroluminescence NORTHERN ELECTRIC CO Ltd 22 Feb 1973 [22 Feb 1972 24 Feb 1972] 8829/73 Heading C4S [Also in Divisions F4 and H1] A solid state light-emitting device comprises parabolic reflector 10, a semi-conductor electroluminescent element 1 at the focus, and encapsulating transparent insulating material with polylenticular lens formation 54 for spreading the light and central conical recess 53 of included angle such that light incident on the recess from the EL element is reflected outwards towards the reflector. PN-junction 2 may be formed in GaP : Zn, O (visible emitting). Pedestal 11 ensures no light is reflected on to the central part of the front face of the insulating material which is illuminated directly. The reflector provides electrical contact to negative lead 13. The lamp shown is circular, the reflector being a paraboloid rather than a parabolic cylinder. To improve the viewing angle (e.g. to 180 degrees), sectoring and/or increase in driving current may have to be accepted. Reflector 52 is composed of three conical sections 55, 56, 57(cf. also Fig. 2, not shown). Dotted lines (58) indicate light rays, and some light will also pass through flat base (59). Protective cup 60 may be a coloured transparent plastic to provide a filter. If the s/c element emits in the non-visible range, an upconverting phosphor (e.g. infra-red to visible) may be coated directly on the element or on a further support. Indicator and signal light applications are instanced. The EL source may be 0À015 inch square.
GB882973A 1971-03-29 1973-02-22 Light emitting devices Expired GB1423011A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA 108873 CA921172A (en) 1972-02-22 1972-02-22 Encapsulated solid state light emitting device
US3821590A 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

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1423011A true true GB1423011A (en) 1976-01-28

Family

ID=39339231

Family Applications (3)

Application Number Title Priority Date Filing Date
GB2012775A Expired GB1423012A (en) 1971-03-29 1973-02-22 Light emitting devices
GB2012675A Expired GB1423013A (en) 1971-03-29 1973-02-22 Light emitting devices
GB882973A Expired GB1423011A (en) 1971-03-29 1973-02-22 Light emitting devices

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB2012775A Expired GB1423012A (en) 1971-03-29 1973-02-22 Light emitting devices
GB2012675A Expired GB1423013A (en) 1971-03-29 1973-02-22 Light emitting devices

Country Status (2)

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

Cited By (15)

* 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
EP0805304A2 (en) * 1996-05-01 1997-11-05 Hiyoshi Electric Co., Ltd. Long light emitting apparatus
WO2001040702A1 (en) * 1999-12-03 2001-06-07 Cree Lighting Company Solid state lamp
EP1453107A1 (en) * 2001-11-16 2004-09-01 Toyoda Gosei Co., Ltd. Light-emitting diode, led light, and light apparatus
EP0762515B1 (en) * 1995-08-25 2004-10-06 Schefenacker Vision Systems Germany GmbH & Co. KG Optical body for at least one light emitting diode
US8328376B2 (en) 2005-12-22 2012-12-11 Cree, Inc. Lighting device
US8632196B2 (en) 2010-03-03 2014-01-21 Cree, Inc. LED lamp incorporating remote phosphor and diffuser with heat dissipation features
US9068701B2 (en) 2012-01-26 2015-06-30 Cree, Inc. Lamp structure with remote LED light source
US9217544B2 (en) 2010-03-03 2015-12-22 Cree, Inc. LED based pedestal-type lighting structure
US9234655B2 (en) 2011-02-07 2016-01-12 Cree, Inc. Lamp with remote LED light source and heat dissipating elements
US9360188B2 (en) 2014-02-20 2016-06-07 Cree, Inc. Remote phosphor element filled with transparent material and method for forming multisection optical elements
US9412926B2 (en) 2005-06-10 2016-08-09 Cree, Inc. High power solid-state lamp
US9488359B2 (en) 2012-03-26 2016-11-08 Cree, Inc. Passive phase change radiators for LED lamps and fixtures
US9841175B2 (en) 2012-05-04 2017-12-12 GE Lighting Solutions, LLC Optics system for solid state lighting apparatus
US9951938B2 (en) 2009-10-02 2018-04-24 GE Lighting Solutions, LLC LED lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982224A3 (en) * 1998-08-28 2001-10-17 C.R.F. Societa' Consortile per Azioni Vehicle head-lamp, particularly for a moped
DE102005009066A1 (en) 2005-02-28 2006-09-07 Osram Opto Semiconductors Gmbh A process for producing an optical and a radiation-emitting device and optical and radiation-emitting component

Cited By (22)

* 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
EP0762515B1 (en) * 1995-08-25 2004-10-06 Schefenacker Vision Systems Germany GmbH & Co. KG Optical body for at least one light emitting diode
EP0805304A3 (en) * 1996-05-01 1998-01-14 Hiyoshi Electric Co., Ltd. Long light emitting apparatus
US5941626A (en) * 1996-05-01 1999-08-24 Hiyoshi Electric Co., Ltd. Long light emitting apparatus
EP0805304A2 (en) * 1996-05-01 1997-11-05 Hiyoshi Electric Co., Ltd. Long light emitting apparatus
WO2001040702A1 (en) * 1999-12-03 2001-06-07 Cree Lighting Company Solid state lamp
US6350041B1 (en) 1999-12-03 2002-02-26 Cree Lighting Company High output radial dispersing lamp using a solid state light source
EP1453107A1 (en) * 2001-11-16 2004-09-01 Toyoda Gosei Co., Ltd. Light-emitting diode, led light, and light apparatus
EP1453107A4 (en) * 2001-11-16 2008-12-03 Toyoda Gosei Kk Light-emitting diode, led light, and light apparatus
US7781787B2 (en) 2001-11-16 2010-08-24 Toyoda Gosei, Co., Ltd. Light-emitting diode, led light, and light apparatus
US9412926B2 (en) 2005-06-10 2016-08-09 Cree, Inc. High power solid-state lamp
US8858004B2 (en) 2005-12-22 2014-10-14 Cree, Inc. Lighting device
US8328376B2 (en) 2005-12-22 2012-12-11 Cree, Inc. Lighting device
US9951938B2 (en) 2009-10-02 2018-04-24 GE Lighting Solutions, LLC LED lamp
US8632196B2 (en) 2010-03-03 2014-01-21 Cree, Inc. LED lamp incorporating remote phosphor and diffuser with heat dissipation features
US9217544B2 (en) 2010-03-03 2015-12-22 Cree, Inc. LED based pedestal-type lighting structure
US9234655B2 (en) 2011-02-07 2016-01-12 Cree, Inc. Lamp with remote LED light source and heat dissipating elements
US9068701B2 (en) 2012-01-26 2015-06-30 Cree, Inc. Lamp structure with remote LED light source
US9488359B2 (en) 2012-03-26 2016-11-08 Cree, Inc. Passive phase change radiators for LED lamps and fixtures
US9841175B2 (en) 2012-05-04 2017-12-12 GE Lighting Solutions, LLC Optics system for solid state lighting apparatus
US9360188B2 (en) 2014-02-20 2016-06-07 Cree, Inc. Remote phosphor element filled with transparent material and method for forming multisection optical elements

Also Published As

Publication number Publication date Type
GB1423012A (en) 1976-01-28 application
GB1423013A (en) 1976-01-28 application
NL7302483A (en) 1973-08-24 application

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Legal Events

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