GB1205375A - Fluorescent lamps of improved colour rendition - Google Patents

Fluorescent lamps of improved colour rendition

Info

Publication number
GB1205375A
GB1205375A GB5614/69A GB561469A GB1205375A GB 1205375 A GB1205375 A GB 1205375A GB 5614/69 A GB5614/69 A GB 5614/69A GB 561469 A GB561469 A GB 561469A GB 1205375 A GB1205375 A GB 1205375A
Authority
GB
United Kingdom
Prior art keywords
activated
magnesium
manganese
calcium
feb
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
GB5614/69A
Inventor
Teizo Hanada
Tomohiko Kobuya
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura 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
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1205375A publication Critical patent/GB1205375A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/48—Separate coatings of different luminous materials

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Luminescent Compositions (AREA)

Abstract

1,205,375. Luminescent materials. TOKYO SHIBAURA ELECTRIC CO. Ltd. 3 Feb., 1969 [3 Feb., 1968], No. 5614/69. Heading C4S. A fluorescent lamp including mercury and an inert gas comprises on the inner wall of the envelope a first fluorescent layer including at least one of manganese activated magnesium fluorogermanate and manganese activated magnesium-arsenate and a second fluorescent layer including a mixture of at least one of blue emitting magnesium tungstate, calcium tungstate and antimony activated calcium halophosphate and at least one of orange emitting tin activated strontium, magnesium, barium orthophosphate, tin activated calcium strontium orthophosphate and calcium halophosphate activated with antimony and manganese. The layers are 21 Œ 5 and 9 Œ 5 microns respectively. The second layer mixture may satisfy the equations x = 3T/200 - 31, x + y = 100, where x Œ 10 and y Œ 10 are the vol. percentages of the blue and orange emitting phosphors respectively and T is the colour temperature in ‹K of the lamp between 3000 and 7000 e.g. 5000‹ K. Specific phosphor combinations are instanced.
GB5614/69A 1968-02-03 1969-02-03 Fluorescent lamps of improved colour rendition Expired GB1205375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP645468 1968-02-03

Publications (1)

Publication Number Publication Date
GB1205375A true GB1205375A (en) 1970-09-16

Family

ID=11638860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5614/69A Expired GB1205375A (en) 1968-02-03 1969-02-03 Fluorescent lamps of improved colour rendition

Country Status (4)

Country Link
US (1) US3569764A (en)
DE (1) DE1905181B2 (en)
FR (1) FR2001295A1 (en)
GB (1) GB1205375A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707641A (en) * 1970-12-22 1972-12-26 Westinghouse Electric Corp Discharge device which utilizes a mixture of two fluorescent materials
JPS6142851A (en) * 1984-08-02 1986-03-01 Matsushita Electronics Corp Fluorescent lamp
US20040113539A1 (en) * 2002-12-12 2004-06-17 Thomas Soules Optimized phosphor system for improved efficacy lighting sources
US7088038B2 (en) * 2003-07-02 2006-08-08 Gelcore Llc Green phosphor for general illumination applications
US20070114562A1 (en) * 2005-11-22 2007-05-24 Gelcore, Llc Red and yellow phosphor-converted LEDs for signal applications
US7497973B2 (en) * 2005-02-02 2009-03-03 Lumination Llc Red line emitting phosphor materials for use in LED applications
US7648649B2 (en) * 2005-02-02 2010-01-19 Lumination Llc Red line emitting phosphors for use in led applications
US7358542B2 (en) * 2005-02-02 2008-04-15 Lumination Llc Red emitting phosphor materials for use in LED and LCD applications
US7274045B2 (en) * 2005-03-17 2007-09-25 Lumination Llc Borate phosphor materials for use in lighting applications
US7847309B2 (en) * 2007-07-16 2010-12-07 GE Lighting Solutions, LLC Red line emitting complex fluoride phosphors activated with Mn4+
DE102008017606A1 (en) * 2008-04-08 2009-10-15 Litec-Lll Gmbh Low-pressure gas discharge lamp for influencing the body's melatonin balance
DE102012203419A1 (en) * 2011-07-29 2013-01-31 Osram Ag Phosphor and fluorescent lamp containing the same
US9633830B2 (en) 2014-08-28 2017-04-25 General Electric Company Phosphor-containing coating systems and fluorescent lamps equipped therewith

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2135732A (en) * 1935-07-30 1938-11-08 Gen Electric Device for producing visible light
US2424454A (en) * 1944-09-25 1947-07-22 Gen Electric Infrared generator
US2452518A (en) * 1944-12-18 1948-10-26 Sylvania Electric Prod Nonactinic fluorescent lamp
US3114067A (en) * 1959-06-26 1963-12-10 Thorn Electrical Ind Ltd Fluorescent lamp particularly suited to illumination of objects containing red
US3409792A (en) * 1965-11-15 1968-11-05 Gen Electric Fluorescent panel lamps with white emitting phosphor coated on envelope backplate and red emitting phosphor coated on envelope faceplate

Also Published As

Publication number Publication date
US3569764A (en) 1971-03-09
DE1905181B2 (en) 1972-07-20
FR2001295A1 (en) 1969-09-26
DE1905181A1 (en) 1969-08-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee