GB1119220A - Improvements relating to low-pressure mercury vapour discharge lamps - Google Patents

Improvements relating to low-pressure mercury vapour discharge lamps

Info

Publication number
GB1119220A
GB1119220A GB5183165A GB5183165A GB1119220A GB 1119220 A GB1119220 A GB 1119220A GB 5183165 A GB5183165 A GB 5183165A GB 5183165 A GB5183165 A GB 5183165A GB 1119220 A GB1119220 A GB 1119220A
Authority
GB
United Kingdom
Prior art keywords
luminescent substance
ultra
layer
pressure mercury
activated
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
GB5183165A
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 GB1119220A publication Critical patent/GB1119220A/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
    • C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
    • 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
    • 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
    • H01J61/44—Devices characterised by the luminescent material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Luminescent Compositions (AREA)

Abstract

In a low pressure mercury vapour fluorescent lamp having the inner surface of its envelope coated with two superimposed luminescent layers, of which the first-next to the envelope-includes manganese - activated magnesium germanate or arsenate, and the second consists mainly of a mixture of a blue luminescent substance and a red luminescent substance, which red luminescent substance has a wide emission spectrum with a maximum between 6000 and 6500 <\>rA and an additional emission in the ultra-violet between 3000 and 4000 <\>rA. The first layer also includes a substance which efficiently absorbs ultra-violet radiation but is highly permeable to radiation with wavelengths greater than 4000 <\>rA-e.g. titanium dioxide or zinc oxide-whereby to absorb any ultra-violet light emitted by the material of the second layer. The blue luminescent substance of the second layer may be antimony-activated ca'cium halophosphate, and the red luminescent substance tin-activated strontium magnesium orthophosphate.
GB5183165A 1964-12-10 1965-12-07 Improvements relating to low-pressure mercury vapour discharge lamps Expired GB1119220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6414338A NL148443B (en) 1964-12-10 1964-12-10 LOW-PRESSURE MERCURY DISCHARGE LAMP.

Publications (1)

Publication Number Publication Date
GB1119220A true GB1119220A (en) 1968-07-10

Family

ID=19791602

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5183165A Expired GB1119220A (en) 1964-12-10 1965-12-07 Improvements relating to low-pressure mercury vapour discharge lamps

Country Status (9)

Country Link
BE (1) BE673475A (en)
CH (1) CH427030A (en)
DE (1) DE1489448C3 (en)
DK (1) DK116009B (en)
ES (1) ES320446A1 (en)
FR (1) FR1457175A (en)
GB (1) GB1119220A (en)
NL (1) NL148443B (en)
NO (1) NO116633B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7400223A (en) * 1974-01-08 1975-07-10 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.

Also Published As

Publication number Publication date
FR1457175A (en) 1966-10-28
CH427030A (en) 1966-12-31
BE673475A (en) 1966-06-08
DE1489448C3 (en) 1975-05-15
DK116009B (en) 1969-12-01
NO116633B (en) 1969-04-28
DE1489448B2 (en) 1974-10-03
ES320446A1 (en) 1966-07-01
DE1489448A1 (en) 1969-03-27
NL148443B (en) 1976-01-15
NL6414338A (en) 1966-06-13

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