WO2006111902A2 - Lampe a decharge gazeuse basse pression comportant des halogenures d'indium et de sodium - Google Patents

Lampe a decharge gazeuse basse pression comportant des halogenures d'indium et de sodium Download PDF

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Publication number
WO2006111902A2
WO2006111902A2 PCT/IB2006/051159 IB2006051159W WO2006111902A2 WO 2006111902 A2 WO2006111902 A2 WO 2006111902A2 IB 2006051159 W IB2006051159 W IB 2006051159W WO 2006111902 A2 WO2006111902 A2 WO 2006111902A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas discharge
low
pressure gas
discharge lamp
indium
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.)
Ceased
Application number
PCT/IB2006/051159
Other languages
English (en)
Other versions
WO2006111902A3 (fr
Inventor
Robert Scholl
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 Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Intellectual Property and Standards GmbH
Koninklijke Philips Electronics NV
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 Intellectual Property and Standards GmbH, Koninklijke Philips Electronics NV filed Critical Philips Intellectual Property and Standards GmbH
Priority to JP2008507231A priority Critical patent/JP2008537303A/ja
Priority to EP06727927A priority patent/EP1875488A2/fr
Publication of WO2006111902A2 publication Critical patent/WO2006111902A2/fr
Publication of WO2006111902A3 publication Critical patent/WO2006111902A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component

Definitions

  • the invention relates to a low-pressure gas discharge lamp comprising a gas discharge vessel with means for generating and maintaining a low-pressure gas discharge.
  • Light generation in low-pressure gas discharge lamps is based on the principle that charge carriers, particularly electrons but also ions, are accelerated so strongly by an electric field coupled into the lamp with or without electrodes, i.e. capacitively or inductively, that collisions with the gas atoms or molecules in the gas filling of the lamp cause the gas atoms or molecules to be excited or ionized.
  • Conventional low-pressure gas discharge lamps comprise mercury in the gas filling but it is known already that mercury in the gas filling of low-pressure gas discharge lamps can be substituted with other less harmful and toxic substances.
  • Indium compounds for example are a preferred gas filling.
  • the emission of the discharge consists of the characteristic emission lines of indium at 410 and 451 nanometers, at 304 and 326 nanometers and a continuum between 320 and 450 nanometers.
  • the specific choice of the indium compound used determines the exact position of the continuum.
  • a general drawback of conventional low-pressure gas discharge lamps for lighting purposes resides in the fact that the substances in the gas filling primarily emit radiation in the short-wave, high-energy, yet invisible range of the electromagnetic spectrum, which radiation must first be converted by phosphors to visible radiation with a much lower energy level. With indium the characteristic emission line at 451 nanometers provides blue light but all other emission lines fall within the invisible range.
  • Low-pressure gas discharge lamps therefore comprise a phosphor layer containing at least one phosphor emitting in the intended range of the spectrum. Depending on the application radiation with different wavelengths in a certain range is provided by an adequate phosphor layer.
  • DE 100 44 562 Al discloses a low-pressure gas discharge lamp comprising a gas discharge vessel with a filling containing an indium compound and a buffer gas in combination with phosphors.
  • a gas discharge vessel with a filling containing an indium compound and a buffer gas in combination with phosphors.
  • high luminous efficacy it is most beneficial, when the visible light is generated from the discharge and not via conversion of discharge radiation into visible light because the intrinsic Stokes shift in case of the conversion reduces the luminous efficacy of the generated visible light.
  • the luminous efficacy expressed in lumen/Watt is the ratio between the total luminous flux emitted by the lamp and the total optical power emitted by the lamp.
  • the luminous efficiency also expressed in lumen/Watt is the ratio between the total luminous flux emitted by the lamp and the total power input to the lamp. Luminous efficiency is equal to luminous efficacy multiplied by the efficiency with which electrical power is converted into optical power.
  • the additional component consisting of one or more sodium halides emits light in the range of 590 nanometers. Use of a red phosphor in order to gain white light is superfluous then.
  • the gas discharge lamp according to the invention emits light with a wavelength of 451 nanometers, blue and green light of one or more phosphors converting the UV radiation and light with a wavelength of 590 nanometers.
  • a further critical point is the partial vapor pressure pNax of the sodium halide being very small compared to the partial vapor pressure pinx of the indium halide. Therefore it is impossible to vaporize both components to a similar degree.
  • As an effect radiation of sodium halide in the characteristic range of 590 nanometers is very weak compared to radiation of indium halide in the characteristic range of 451 nanometers.
  • the gas filling therefore comprises a salt mixture of indium monohalides and sodium halides with the indium monohalide content being very small.
  • the salt components are vaporized according to their concentration and therefore the relation between the vaporized components can be controlled by providing a certain mixing ratio.
  • halogen employed is bromine
  • the components a mixed in a ratio to gain white light.
  • a molecular gas discharge takes place at low pressure, which gas discharge emits radiation in the visible range of the electromagnetic spectrum. This way direct use is made from the radiation of the discharge and Stokes shift losses caused by a luminescence process are avoided or at least reduced.
  • the lamp in accordance with the invention has a luminescence process which is substantially more efficient than that of conventional low-pressure discharge lamps. As a consequence the lamp in accordance with the invention has in general a higher luminous efficacy.

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

L'invention se rapporte à une lampe à décharge gazeuse basse pression comportant une enceinte à décharge gazeuse ayant un moyen pour générer et maintenir une décharge gazeuse basse pression. La présente invention vise à améliorer le rendement lumineux d'une lampe à décharge gazeuse basse pression, remplie d'un gaz ayant un composé indium. Conformément à la présente invention, cette amélioration est possible avec une lampe à décharge gazeuse basse pression dans laquelle des processus de luminescence moins nombreux sont mis en oeuvre. La lampe à décharge gazeuse basse pression comporte une enceinte à décharge gazeuse, remplie d'un gaz contenant à la base un halogénure d'indium InX, où X = F, Cl, Br, I, ou un mélange de plusieurs halogénures d'indium. Cette invention se caractérise en ce que le gaz de remplissage contient également un halogénure de sodium NaX, où X = F, Cl, Br, I, ou un mélange de plusieurs halogénures de sodium. Le composant supplémentaire constituant un ou plusieurs des halogénures de sodium émet de la lumière de l'ordre de 590 nanomètres. L'utilisation d'un luminophore rouge pour obtenir la lumière blanche est alors superflue. La décharge gazeuse émet une lumière ayant une longueur d'onde de 451 nanomètres, une lumière bleue et verte d'un ou de plusieurs luminophores transformant le rayonnement UV et la lumière ayant une longueur d'onde de 590 nanomètres.
PCT/IB2006/051159 2005-04-20 2006-04-13 Lampe a decharge gazeuse basse pression comportant des halogenures d'indium et de sodium Ceased WO2006111902A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008507231A JP2008537303A (ja) 2005-04-20 2006-04-13 インジウム及びナトリウムのハロゲン化物を含む低圧ガス放電ランプ
EP06727927A EP1875488A2 (fr) 2005-04-20 2006-04-13 Lampe a decharge gazeuse basse pression comportant des halogenures d'indium et de sodium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05103201.9 2005-04-20
EP05103201 2005-04-20

Publications (2)

Publication Number Publication Date
WO2006111902A2 true WO2006111902A2 (fr) 2006-10-26
WO2006111902A3 WO2006111902A3 (fr) 2007-03-08

Family

ID=37115529

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/051159 Ceased WO2006111902A2 (fr) 2005-04-20 2006-04-13 Lampe a decharge gazeuse basse pression comportant des halogenures d'indium et de sodium

Country Status (4)

Country Link
EP (1) EP1875488A2 (fr)
JP (1) JP2008537303A (fr)
CN (1) CN101164135A (fr)
WO (1) WO2006111902A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9064024B2 (en) 2007-08-21 2015-06-23 Google Inc. Bundle generation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7990040B2 (en) * 2008-06-11 2011-08-02 General Electric Company Phosphor for high CRI lamps

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR90083E (fr) * 1966-05-27 1967-10-06 Lampes Sa Dispositif applicable aux lampes à décharge électrique contenant des iodures métalliques en vapeur saturante notamment de l'iodure de sodium
NL164423C (nl) * 1969-12-13 1980-12-15 Philips Nv Lagedruknatriumdampontladingslamp.
GB8915611D0 (en) * 1989-07-07 1989-08-23 Emi Plc Thorn A discharge tube arrangement
JPH03152852A (ja) * 1989-11-08 1991-06-28 Matsushita Electric Works Ltd 高輝度放電ランプ及び無電極放電灯装置
DE10044562A1 (de) * 2000-09-08 2002-03-21 Philips Corp Intellectual Pty Niederdruckgasentladungslampe mit quecksilberfreier Gasfüllung
DE10242241A1 (de) * 2002-09-12 2004-03-25 Philips Intellectual Property & Standards Gmbh Niederdruckgasentladungslampe mit Ba TiO3-ähnlichen Elektronen-Ermittersubstanzen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9064024B2 (en) 2007-08-21 2015-06-23 Google Inc. Bundle generation

Also Published As

Publication number Publication date
CN101164135A (zh) 2008-04-16
JP2008537303A (ja) 2008-09-11
WO2006111902A3 (fr) 2007-03-08
EP1875488A2 (fr) 2008-01-09

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