US3624444A - Low-pressure mercury vapor discharge lamp - Google Patents

Low-pressure mercury vapor discharge lamp Download PDF

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Publication number
US3624444A
US3624444A US51576A US3624444DA US3624444A US 3624444 A US3624444 A US 3624444A US 51576 A US51576 A US 51576A US 3624444D A US3624444D A US 3624444DA US 3624444 A US3624444 A US 3624444A
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US
United States
Prior art keywords
layer
pressure mercury
low
mercury vapor
vapor discharge
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 - Lifetime
Application number
US51576A
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English (en)
Inventor
Frank Berthold
Rolf Groth
Rudiger Jost
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 DE19691934299 external-priority patent/DE1934299C3/de
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3624444A publication Critical patent/US3624444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • H01J61/46—Devices characterised by the binder or other non-luminescent constituent of the luminescent material, e.g. for obtaining desired pouring or drying properties

Definitions

  • the tin oxide layer is provided with a light-transmitting protective layer of one or more of the colorless oxides of the elements from the secondary groups in column 4 and 5 of the periodical system, e.g. titanium dioxide or zirconium dioxide.
  • the invention relates to a low-pressure mercury vapor discharge lamp and particularly to such a lamp which converts the ultraviolet radiation generated in the discharge into visible radiation by means of a luminescent material.
  • Lamps of the kind described above have been known for a long time in many forms. Many of these lamps are used for general illumination purposes, but special types are also used for making photo copies.
  • auxiliary means are almost always used for igniting the lamp.
  • One of the well-known auxiliary means is a so-called starter which generates a voltage for a short period, which voltage is so much higher than the ignition voltage that an ignition of the lamp is ensured.
  • ignition strips are used which are provided either on the outer side or on the inner side of the envelope of the lamp and which extend from one to the other electrode. These ignition strips may optionally be connected to the electrodes.
  • the inner side of the glass envelope of the lamp was coated with a light-transmitting layer of conducting tin oxide on the entire surface or on a large part of the surface between the electrodes.
  • the expression light-transmitting is understood to means that the useful radiation to be emitted by the lamp is transmitted. in lamps for general illumination purposes this means that the layer satisfactorily passes the light generated with the aid of the luminescent layer.
  • the luminescent layer is always provided on the side of the tin oxide layer facing the discharge.
  • lamps provided with tin oxide layer are distinguished by a very satisfactory ignition behavior over a wide temperature range and in this respect they are preferred to the lamps provided with ignition strips.
  • lamps having a strip provided on the outer side of the envelope ignite satisfactorily at low ambient temperatures; lamps having a strip on the inner side only ignite at comparatively high ambient temperatures.
  • lamps having a tin oxide layer have a satisfactory ignition behavior over the entire temperature range which is covered by the two ignition strip types combined.
  • the use of a tin oxide layer has, however, a great drawback, for it has been found that after some time, sometimes already after 50 operating hours, black stains having a diameter of up to several mms are formed on the inner side of the discharge tube.
  • a lowpressure mercury vapor discharge lamp comprises a glass envelope whose inner side is provided with a layer of luminescent material and with a lighttransmitting layer of conducting tin oxide located between the luminescent layer and the glass envelope and is characterized in that the tin oxide layer on the side remote from the glass envelope is provided with a light-transmitting protective layer of one or more of the colorless oxides of the elements from the secondary groups in the columns 4 and 5 of the periodical system of the elements and that the protective layer has a thickness of from 002-] pm.
  • the oxides of titanium, zirconium, hafnium, niobium and tantalum are suitable for the protective layer, because these oxides do not absorb the useful radiation to be emitted by the lamp.
  • a layer of titanium dioxide is preferably used, because this material is not expensive and can be easily provided in the form of a homogeneous layer on the tin oxide layer by means of a method explained with reference to the following examples.
  • the oxides to be used for the protective layer are substantially insulating and constitute a dielectric layer.
  • the protective layers influence the conductivity of the tin oxide layer only to a very slight extent. it has been found that the adhesion of the luminescent materials to the protective layer is satisfactory.
  • the reference numeral 1 denotes the glass envelope of a low-pressure mercury vapor discharge lamp the ends of which are provided with electrodes 2 and 3.
  • the inner side of the envelope 1 has a layer of conducting tin oxide 4, a protective layer 5 of one or more of the colorless oxides of the elements from the secondary groups in the columns 4 and 5 of the periodical system of the elements and a layer 6 of luminescent material.
  • the thicknesses of the tin oxide layer 4 and the light-transmitting layer 5 are indicated greatly exaggerated as compared with the thickness of the glass envelope 1.
  • EXAMPLE I The glass envelope to be coated of a low-pressure mercury vapor discharge lamp was heated in an electric tube furnace to a temperature of approximately 450-500 C., preferably 480 C. A solution of 20 percent of SnCl in butanol to which a few percents of HF were added was sprayed with the aid of a spray nozzle and passed in vapor form through the envelope.
  • EXAMPLE II A glass tube for a low-pressure mercury vapor discharge lamp was provided with a tin oxide layer in a similar manner as described in example I. This tin oxide layer was coated with a protective layer of zirconium oxide by means of the method described with reference to example l. To this end a per cent solution of tetrapropylzirconate in propanol was used during spraying.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
US51576A 1969-07-05 1970-07-01 Low-pressure mercury vapor discharge lamp Expired - Lifetime US3624444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691934299 DE1934299C3 (de) 1969-07-05 Niederdruck-Quecksilberdampf-Entladungslampe

Publications (1)

Publication Number Publication Date
US3624444A true US3624444A (en) 1971-11-30

Family

ID=5739058

Family Applications (1)

Application Number Title Priority Date Filing Date
US51576A Expired - Lifetime US3624444A (en) 1969-07-05 1970-07-01 Low-pressure mercury vapor discharge lamp

Country Status (6)

Country Link
US (1) US3624444A (de)
AT (1) AT292121B (de)
BE (1) BE753011A (de)
FR (1) FR2054130A5 (de)
GB (1) GB1271769A (de)
NL (1) NL158319B (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852607A (en) * 1973-09-21 1974-12-03 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3875454A (en) * 1972-11-25 1975-04-01 Philips Corp Low-pressure mercury vapour discharge lamp and method of manufacturing said lamp
US3919577A (en) * 1973-09-21 1975-11-11 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3963954A (en) * 1974-11-25 1976-06-15 Gte Sylvania Incorporated Fluorescent lamp having indium oxide conductive coating and a protective coating therefor
US3967153A (en) * 1974-11-25 1976-06-29 Gte Sylvania Incorporated Fluorescent lamp having electrically conductive coating and a protective coating therefor
DE2644821A1 (de) * 1975-10-06 1977-04-14 Gte Sylvania Inc Leuchtstofflampe mit reflektorschicht
US4020385A (en) * 1976-08-09 1977-04-26 Gte Sylvania Incorporated Fluorescent lamp having conductive film and protective film therefor
US4289991A (en) * 1974-11-25 1981-09-15 Gte Products Corporation Fluorescent lamp with a low reflectivity protective film of aluminum oxide
US4379981A (en) * 1981-06-04 1983-04-12 Westinghouse Electric Corp. Fluorescent lamp having improved barrier layer
US4500810A (en) * 1980-11-25 1985-02-19 North American Philips Lighting Corporation Fluorescent lamp having integral light-filtering means and starting aid
US4517491A (en) * 1983-08-01 1985-05-14 General Electric Company Incandescent lamp source utilizing an integral cylindrical transparent heat mirror
US4731560A (en) * 1970-08-06 1988-03-15 Owens-Illinois Television Products, Inc. Multiple gaseous discharge display/memory panel having improved operating life
US4794308A (en) * 1970-08-06 1988-12-27 Owens-Illinois Television Products Inc. Multiple gaseous discharge display/memory panel having improved operating life
US4835444A (en) * 1986-02-10 1989-05-30 Photo Redux Corp. Radiation-emitting devices
US4853581A (en) * 1986-02-10 1989-08-01 Photo Redux Corp. Radiation-emitting devices
US4879489A (en) * 1986-02-10 1989-11-07 Photo Redux Corp. Radiation-emitting devices
US5136214A (en) * 1990-07-16 1992-08-04 General Electric Company Use of silicon to extend useful life of metal halide discharge lamps
US5187415A (en) * 1989-06-13 1993-02-16 Mitsubishi Denki Kabushiki Kaisha Low-pressure rare gas discharge lamp and method for lighting same
US5539277A (en) * 1992-12-28 1996-07-23 General Electric Company Fluorescent lamp having high resistance conductive coating adjacent the electrodes
US5753999A (en) * 1994-08-25 1998-05-19 U.S. Philips Corporation Low-pressure mercury vapour discharge lamp
US6174213B1 (en) * 1999-09-01 2001-01-16 Symetrix Corporation Fluorescent lamp and method of manufacturing same
US20020024278A1 (en) * 2000-03-14 2002-02-28 Ryoutarou Matsuda Ultraviolet ray lamp and sterilizers and cleaners using the lamp
US6376691B1 (en) 1999-09-01 2002-04-23 Symetrix Corporation Metal organic precursors for transparent metal oxide thin films and method of making same
US20070138960A1 (en) * 2005-12-16 2007-06-21 General Electric Company Fluorescent lamp with conductive coating
US20080224068A1 (en) * 2007-03-14 2008-09-18 Jenn-Wei Mii Light illuminating element
US20090079325A1 (en) * 2005-05-31 2009-03-26 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp and process for producing the same, and illuminator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8202778A (nl) * 1982-07-09 1984-02-01 Philips Nv Lagedrukkwikdampontladingslamp.
DE102005057527A1 (de) * 2005-12-01 2007-06-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe mit verbesserter Zündfähigkeit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350598A (en) * 1965-12-29 1967-10-31 Sylvania Electric Prod High pressure electric discharge device containing a fill of mercury, halogen and an alkali metal and barrier refractory oxide layers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350598A (en) * 1965-12-29 1967-10-31 Sylvania Electric Prod High pressure electric discharge device containing a fill of mercury, halogen and an alkali metal and barrier refractory oxide layers

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4731560A (en) * 1970-08-06 1988-03-15 Owens-Illinois Television Products, Inc. Multiple gaseous discharge display/memory panel having improved operating life
US4794308A (en) * 1970-08-06 1988-12-27 Owens-Illinois Television Products Inc. Multiple gaseous discharge display/memory panel having improved operating life
US3875454A (en) * 1972-11-25 1975-04-01 Philips Corp Low-pressure mercury vapour discharge lamp and method of manufacturing said lamp
US3919577A (en) * 1973-09-21 1975-11-11 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3852607A (en) * 1973-09-21 1974-12-03 Owens Illinois Inc Multiple gaseous discharge display/memory panel having thin film dielectric charge storage member
US3967153A (en) * 1974-11-25 1976-06-29 Gte Sylvania Incorporated Fluorescent lamp having electrically conductive coating and a protective coating therefor
US4289991A (en) * 1974-11-25 1981-09-15 Gte Products Corporation Fluorescent lamp with a low reflectivity protective film of aluminum oxide
US3963954A (en) * 1974-11-25 1976-06-15 Gte Sylvania Incorporated Fluorescent lamp having indium oxide conductive coating and a protective coating therefor
DE2644821A1 (de) * 1975-10-06 1977-04-14 Gte Sylvania Inc Leuchtstofflampe mit reflektorschicht
US4020385A (en) * 1976-08-09 1977-04-26 Gte Sylvania Incorporated Fluorescent lamp having conductive film and protective film therefor
US4500810A (en) * 1980-11-25 1985-02-19 North American Philips Lighting Corporation Fluorescent lamp having integral light-filtering means and starting aid
US4379981A (en) * 1981-06-04 1983-04-12 Westinghouse Electric Corp. Fluorescent lamp having improved barrier layer
US4517491A (en) * 1983-08-01 1985-05-14 General Electric Company Incandescent lamp source utilizing an integral cylindrical transparent heat mirror
US4835444A (en) * 1986-02-10 1989-05-30 Photo Redux Corp. Radiation-emitting devices
US4853581A (en) * 1986-02-10 1989-08-01 Photo Redux Corp. Radiation-emitting devices
US4879489A (en) * 1986-02-10 1989-11-07 Photo Redux Corp. Radiation-emitting devices
US5187415A (en) * 1989-06-13 1993-02-16 Mitsubishi Denki Kabushiki Kaisha Low-pressure rare gas discharge lamp and method for lighting same
US5136214A (en) * 1990-07-16 1992-08-04 General Electric Company Use of silicon to extend useful life of metal halide discharge lamps
US5539277A (en) * 1992-12-28 1996-07-23 General Electric Company Fluorescent lamp having high resistance conductive coating adjacent the electrodes
US5753999A (en) * 1994-08-25 1998-05-19 U.S. Philips Corporation Low-pressure mercury vapour discharge lamp
US6686489B2 (en) 1999-09-01 2004-02-03 Symetrix Corporation Metal organic precursors for transparent metal oxide thin films and method of making same
US6174213B1 (en) * 1999-09-01 2001-01-16 Symetrix Corporation Fluorescent lamp and method of manufacturing same
US6376691B1 (en) 1999-09-01 2002-04-23 Symetrix Corporation Metal organic precursors for transparent metal oxide thin films and method of making same
US6861787B2 (en) * 2000-03-14 2005-03-01 Toshiba Lighting & Technology Corporation Ultraviolet ray lamp and sterilizers and cleaners using the lamp
US20020024278A1 (en) * 2000-03-14 2002-02-28 Ryoutarou Matsuda Ultraviolet ray lamp and sterilizers and cleaners using the lamp
US20090079325A1 (en) * 2005-05-31 2009-03-26 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp and process for producing the same, and illuminator
US7986082B2 (en) * 2005-05-31 2011-07-26 Panasonic Corporation Fluorescent lamp with glass tube and protective layer, method for producing the same, and lighting system
US20070138960A1 (en) * 2005-12-16 2007-06-21 General Electric Company Fluorescent lamp with conductive coating
US7378797B2 (en) 2005-12-16 2008-05-27 General Electric Company Fluorescent lamp with conductive coating
US20080224068A1 (en) * 2007-03-14 2008-09-18 Jenn-Wei Mii Light illuminating element
US7919913B2 (en) * 2007-03-14 2011-04-05 Mii Jenn-Wei Light illuminating element
TWI402882B (zh) * 2007-03-14 2013-07-21 Jenn Wei Mii 發光元件

Also Published As

Publication number Publication date
AT292121B (de) 1971-08-10
DE1934299B2 (de) 1975-06-05
FR2054130A5 (de) 1971-04-16
NL158319B (nl) 1978-10-16
NL7009687A (de) 1971-01-07
BE753011A (fr) 1971-01-04
GB1271769A (en) 1972-04-26
DE1934299A1 (de) 1971-01-21

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