GB1480876A - Electric gas discharge lamp - Google Patents

Electric gas discharge lamp

Info

Publication number
GB1480876A
GB1480876A GB10307/75A GB1030775A GB1480876A GB 1480876 A GB1480876 A GB 1480876A GB 10307/75 A GB10307/75 A GB 10307/75A GB 1030775 A GB1030775 A GB 1030775A GB 1480876 A GB1480876 A GB 1480876A
Authority
GB
United Kingdom
Prior art keywords
discharge
layer
layers
march
discharge lamp
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
GB10307/75A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1480876A publication Critical patent/GB1480876A/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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7774—Aluminates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/75—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
    • C09K11/76—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony also containing phosphorus and halogen, e.g. halophosphates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7784—Chalcogenides
    • C09K11/7787—Oxides

Abstract

1480876 Mercury-vapour lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 12 March 1975 [15 March 1974] 10307/75 Heading H1D [Also in Division C4] A high or low-pressure gas-discharge lamp comprises two superposed luminescent layers, the layer nearer the discharge consisting of luminescent material which per unit weight is more expensive than the remote layer. Further, the difference between the chromaticity points of the light emitted by the two layers is less than 3À5/(1-p)CIE units, where p represents the proportion of light conversion contributed by the layer nearer the discharge. The conversion factor p must lie between 0À80 and 0À99. Several examples are given in which the remote layer consists of a certain weight of calcium or strontium halophosphate activated by antimony or manganese and the layer nearer the discharge of a smaller weight of a mixture of the three materials A, B, C: Two examples of suitable mixtures are: The invention is described as applied to a low pressure mercury vapour lamp having luminescent layers on the internal surface of the envelope.
GB10307/75A 1974-03-15 1975-03-12 Electric gas discharge lamp Expired GB1480876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7403467.A NL165605C (en) 1974-03-15 1974-03-15 ELECTRIC GAS DISCHARGE LAMP.

Publications (1)

Publication Number Publication Date
GB1480876A true GB1480876A (en) 1977-07-27

Family

ID=19820960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10307/75A Expired GB1480876A (en) 1974-03-15 1975-03-12 Electric gas discharge lamp

Country Status (20)

Country Link
JP (1) JPS53867B2 (en)
AR (1) AR209763A1 (en)
AT (1) AT339428B (en)
BE (1) BE826651A (en)
BR (1) BR7501449A (en)
CA (1) CA1020620A (en)
CH (1) CH578251A5 (en)
DE (1) DE2509931C3 (en)
DK (1) DK139949B (en)
FI (1) FI57853C (en)
FR (1) FR2264389B1 (en)
GB (1) GB1480876A (en)
IL (1) IL46810A (en)
IN (1) IN143975B (en)
IT (1) IT1034215B (en)
NL (1) NL165605C (en)
NO (1) NO140156C (en)
SE (1) SE403535B (en)
YU (1) YU59775A (en)
ZA (1) ZA751295B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010991A2 (en) * 1978-11-06 1980-05-14 Westinghouse Electric Corporation Light source for illuminating objects with enhanced perceived coloration
US5402036A (en) * 1991-01-30 1995-03-28 Toshiba Lighting And Technology Corporation Low pressure mercury vapor discharge lamp having double layers

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL181470C (en) * 1977-08-23 1987-08-17 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
US4070598A (en) * 1976-11-08 1978-01-24 General Electric Company Fluorescent lamp with second phosphor layer
FR2379161A2 (en) * 1977-01-28 1978-08-25 Gen Electric FUORESCENT LAMP
NL182998C (en) * 1977-05-06 1988-06-16 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
US4431941A (en) * 1979-06-11 1984-02-14 Gte Products Corporation Fluorescent lamp having double phosphor layer
US4305019A (en) * 1979-12-31 1981-12-08 Westinghouse Electric Corp. Warm-white fluorescent lamp having good efficacy and color rendering and using special phosphor blend as separate undercoat
DE10152217A1 (en) * 2001-10-23 2003-04-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Fluorescent composition for low pressure discharge lamps
US7768189B2 (en) * 2004-08-02 2010-08-03 Lumination Llc White LEDs with tunable CRI
DE102008017606A1 (en) * 2008-04-08 2009-10-15 Litec-Lll Gmbh Low-pressure gas discharge lamp for influencing the body's melatonin balance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0010991A2 (en) * 1978-11-06 1980-05-14 Westinghouse Electric Corporation Light source for illuminating objects with enhanced perceived coloration
EP0010991A3 (en) * 1978-11-06 1980-05-28 Westinghouse Electric Corporation Light source for illuminating objects with enhanced perceived coloration
US5402036A (en) * 1991-01-30 1995-03-28 Toshiba Lighting And Technology Corporation Low pressure mercury vapor discharge lamp having double layers

Also Published As

Publication number Publication date
FI750713A (en) 1975-09-16
IL46810A (en) 1977-01-31
SE7502740L (en) 1975-09-16
AU7914875A (en) 1976-09-23
DK139949B (en) 1979-05-21
AT339428B (en) 1977-10-25
BR7501449A (en) 1975-12-23
JPS53867B2 (en) 1978-01-12
FI57853C (en) 1981-08-07
BE826651A (en) 1975-09-15
DE2509931A1 (en) 1975-09-25
FI57853B (en) 1980-06-30
NL165605C (en) 1981-04-15
IN143975B (en) 1978-03-04
AR209763A1 (en) 1977-05-31
DE2509931B2 (en) 1979-01-11
NO140156B (en) 1979-04-02
IT1034215B (en) 1979-09-10
ATA189875A (en) 1977-02-15
DE2509931C3 (en) 1979-09-06
ZA751295B (en) 1976-10-27
NO750833L (en) 1975-09-16
NO140156C (en) 1979-07-18
FR2264389B1 (en) 1979-09-28
SE403535B (en) 1978-08-21
IL46810A0 (en) 1975-05-22
DK101175A (en) 1975-09-16
DK139949C (en) 1979-10-22
YU59775A (en) 1982-06-30
CA1020620A (en) 1977-11-08
FR2264389A1 (en) 1975-10-10
NL7403467A (en) 1975-09-17
CH578251A5 (en) 1976-07-30
JPS50127480A (en) 1975-10-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19950311