EP0331660A2 - Lampe à décharge dans un gaz à basse pression - Google Patents
Lampe à décharge dans un gaz à basse pression Download PDFInfo
- Publication number
- EP0331660A2 EP0331660A2 EP89850075A EP89850075A EP0331660A2 EP 0331660 A2 EP0331660 A2 EP 0331660A2 EP 89850075 A EP89850075 A EP 89850075A EP 89850075 A EP89850075 A EP 89850075A EP 0331660 A2 EP0331660 A2 EP 0331660A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- lamp
- fluorescent tube
- fluorescent
- outer glass
- 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 claims abstract description 23
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 9
- 206010056740 Genital discharge Diseases 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- -1 siloxane compound Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 229910052756 noble gas Inorganic materials 0.000 claims description 2
- 230000001427 coherent effect Effects 0.000 claims 1
- 150000002835 noble gases Chemical class 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052753 mercury Inorganic materials 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 11
- 239000007858 starting material Substances 0.000 description 11
- 239000003570 air Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241000023320 Luma <angiosperm> Species 0.000 description 1
- 229920002319 Poly(methyl acrylate) Polymers 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 description 1
- 230000000485 pigmenting effect Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers
-
- 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
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Definitions
- the present invention relates to a gas discharge lamp of the tubular kind filled with gas or vapour at low pressure, e.g. a fluorescent lamp.
- a gas discharge lamp of the tubular kind filled with gas or vapour at low pressure e.g. a fluorescent lamp.
- the inventive gas discharge lamp has properties which render it especially suited for use in low ambient temperatures.
- the lamp is therefore particularly suited for outdoor use in the Nordic winter climate, and also for illuminating cold storage and freeze storage facilities.
- Fluorescent lamps are widely used in the open, because the fluorescent lamp gives light more efficiently than an incandescent lamp. In addition to street lighting, fluorescent lamps have thus been used to illuminate road signs, as canopy lighting, e.g.
- a fluorescent tube which is mounted in known kinds of lamp casings or enclosures will, to some extent, be self-heating, since the air present in the casing is able to conduct heat away from the actual fluorescent tube only to a very limited extent.
- This problem applies to fluorescent tubes incorporated in advertising signs (company name signs) and road signs (traffic), such as overhead lane-destination signs of partially translucent design, and also to fluorescent tubes which are mounted in enclosed lamp fittings. With the ambient air stationary and the air temperature beneath 0°C, this self-heating effect will result in a surface temperature of +15°C on the coldest part of the fluorescent tube.
- the self-heating effect is so small as to produce hardly any increase in luminous flux.
- the lamp casings or enclosures absorb all of the increase in luminous flux achieved by self-heating of the fluorescent tube. Consequently, the great majority of fluorescent lamps for outdoor use are of the kind which have reflectors fitted over the fluorescent tube, but which lack the provision of a casing.
- the purpose of encasing fluorescent lamps is to protect the fluorescent tubes from damage through mechanical causes, and the lighting requirement has been made secondary to the need of protecting the lamp.
- Tunnels are another area of use in which fluorescent tubes or lamps can be subjected to the effects of low ambient temperatures.
- the air flow through tunnels, even when the tunnels have a length of several hundred meters, is so large that any heat which may be radiated from the surrounding rock or earth is unable to supplement heating of the surfaces of the fluorescent tube.
- the luminous flux will decrease exponentially with falling air temperatures. This can have a serious consequence, for instance, on a cold sunny winter's day when a car driver will see the road with an illumination strength of close to 100 000 lux.
- this driver enters an illuminated tunnel his eyes must adjust to an illuminance which is far below 100 lux. Road safety and the driver's own feeling of security are assisted by the fact that the fluorescent lamps in the tunnel maintain a practically normal luminous flux, even in very cold weather conditions.
- the luminous flux is reduced to a third of its original value when the ambient temperature lies within a range of +10°C to 0°C.
- the matter is made more serious by the fact that the luminous flux of a 26 mm tube at +10°C is 20% lower than the luminous flux of a 38 mm tube of corresponding power.
- the starters or chokes normally used are effective in short circuiting the electrodes, so that they are preheated by through surging current, whereby when the striker opens, a spark arcs from anode to cathode and a positive column is generated therebetween.
- the striker will open and close a number of times before the electrodes are sufficiently warm to sustain an arc therebetween. It may often take 30 seconds for the tube to ignite, which drawback is far more manifest in 26 mm tubes than in tubes of 38 mm in diameter.
- the object of the present invention is to solve the problems which are associated with the use of narrow fluorescent tubes in freezing temperatures and to provide a lamp which has high illuminance at low temperatures.
- This object is realized in accordance with the invention with a narrow fluorescent tube which is surrounded along the whole of its length by a fixed transparent outer tube, for instance a glass tube.
- Other characteristic features of the inventive solution are set forth in the following claims.
- a gas-discharge lamp which comprises an inner fluorescent tube that is surrounded or enveloped by a glass tube or envelope, which may be transparent or opalescent.
- the ends of this outer tube or envelope are fixed to the cathode-containing ends of the glass tube of the discharge lamp, such as to leave a tubular space of constant width between the outer tube and the inner tube.
- This fixation of the outer glass tube may be effected with the aid of seals located at the ends of the lamp, between the two glass tubes.
- These seals may have the form of polymer sealing rings, or may otherwise comprise age-resistant gas-impermeable material.
- the gas most preferred in this respect is dry, dust-free air, although in particular cases the gas may comprise a noble gas or a mixture of such gases.
- the gas in the aforesaid space may be kept at atmospheric pressure, although in combination with the tube wall, which is normally less than 2 mm thick, and in order to increase the heat insulating ability, the gas is preferably held at a pressure beneath atmospheric.
- the insulating ability is also dependent on the width of the space, which width may be from 2-10 mm, depending on the intended lamp application. When the fluorescent tube has an external diameter of 26 mm and is surrounded by a glass envelope whose outer diameter is 38 mm, the tubular space will have a width of 5 mm.
- the light may be directed positively from the lamp fitting, normally downwards.
- the inner surface of the tubular envelope or outer glass tube may be coated with a light and heat reflective material, through an angle of arc of up to 180°C.
- this embodiment affords the further advantage of reflecting heat rays back to the discharge chamber of the lamp.
- the resultant increase in the temperature of the discharge chamber corresponds to an increase in illumination strength of more than 20% when the ambient temperature is beneath +10°C. Together with the light reflection, an increase in illuminating power of between 50 and 60% can be achieved.
- Fluorescent tubes of this construction can also be turned through 180°C in reflector-fitted lamp fittings, resulting in a type of top-reflection. This gives a very soft light and promotes self-heating of the lamp.
- the inventive lamp is believed to afford a good solution to the illuminating requirements expressed by those who work on oil rigs in arctic climates.
- the outer envelope of the inventive lamp will also afford protection against mechanical damage.
- the inventive lamp thus provides in this instance a safety lamp which will reduce explosion hazards on oil platforms and rigs.
- the inventive lamp illustrated in Figure 1 is a preferred embodiment of the invention, namely a double- walled fluorescent lamp 1.
- the lamp comprises a fluorescent tube 2 which has a diameter of 26 mm and which is fitted at both ends with lamp bases 3 having connector pins 4.
- the tube 2 also has cathodes placed on a terminal foot 5 in the usual manner, the cathodes in this case being surrounded by electrode screens 6.
- the electrical contact pins extend through the foot, or base, 5 to the cathode current distributor 7.
- the fluorescent tube 2 of the illustrated embodiment is surrounded by a tubular glass envelope 8 which is transparent and has an outer diameter of 38 mm and the ends of which are drawn or necked slightly inwards.
- the ends of the tubular envelope 8 are inserted into ring-shaped grooves in polymer rings 9 which are press-fitted onto the bases 3.
- the tubular envelope is fitted with the aid of polymer rings 9 in a chamber which is under a partial vacuum and to which only dry, filtered air is introduced, the air present in a tubular space 10 between the fluorescent tube 2 and the tubular envelope 8 will be free from dust.
- the application of atmospheric pressure will assist in holding the polymer rings 9 tightly and sealingly between the envelopes 8 and respective lamp bases 3.
- seals 11 consisting of some form of siloxane are provided on the side of the polymer rings 9 that faces towards the discharge chamber.
- siloxane compound can be placed in the grooves in the rings 9 into which respective ends of the outer tube 8 are fitted, and a bead of siloxane compound can be provided on the fluorescent tube 2 in immediate contact with the polymer rings 9.
- polydimethylsiloxane compound disposed on each end of the lamp.
- the active substance in the siloxane compound comprises trimethyl siloxane monomers and an addition of a catalyzing and stabilizing substance.
- the ignition time for the 36W Termo lamps was under 5 seconds, whereas the 36W lamps took between 8 and 20 seconds to ignite, the longest ignition times being experienced with the eldest starters.
- the 58W lamps could not be ignited with the oldest starters at the aforesaid test temperature. When using the starters which had been used 2000 times previously, only some of the lamps would ignite, and then only after an average time lapse of 25 seconds. When using a new starter, one lamp ignited after 8 seconds and all lamps ignited during the tests with new starters were seen to ignite in 15 seconds or less. In the case of the 58W Termo lamps, ignitions were observed within 8 seconds, except in the case of those lamps with which old starters were used.
- Figures 2, 3 and 4 show the average luminance of the lamps tested, at different temperatures. Previously documented values for 20W, 40W and 65W lamps have also been shown, for comparison purposes.
- the inner surfaces of the outer glass tube or envelope of the inventive lamp may be coated with substances which will filter out undesired light.
- This technique enables critical ultraviolet lines to be further reduced with the aid of light-absorbing or fluorescent substances. The following substances have been found suitable in this respect.
- the substances are applied to the inner surface of the outer tube 8 in the form of a suspension having a dry solids content of between 0.3 and 0.5mg/cm2. These dyestuffs or pigmenting substances are burned onto the glass. Alternatively, organic dyestuffs may be used. When using organic dyestuff, however, burning, or stoving, cannot be effected at temperatures which lie above 500°C. In all events, a binder must be added when burning, baking,organic dyestuffs.
- One suitable binder in this regard is ammonium polymethyl acrylate.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Gas Separation By Absorption (AREA)
- Secondary Cells (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8800747A SE8800747D0 (sv) | 1988-03-02 | 1988-03-02 | Lagtrycks-gasurladdningslampa |
| SE8800747 | 1988-03-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0331660A2 true EP0331660A2 (fr) | 1989-09-06 |
| EP0331660A3 EP0331660A3 (fr) | 1991-01-23 |
| EP0331660B1 EP0331660B1 (fr) | 1995-06-28 |
Family
ID=20371561
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88850215A Withdrawn EP0330808A1 (fr) | 1988-03-02 | 1988-06-17 | Lampe à décharge à basse pression |
| EP89850075A Expired - Lifetime EP0331660B1 (fr) | 1988-03-02 | 1989-03-02 | Lampe à décharge dans un gaz à basse pression |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88850215A Withdrawn EP0330808A1 (fr) | 1988-03-02 | 1988-06-17 | Lampe à décharge à basse pression |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP0330808A1 (fr) |
| AT (1) | ATE124573T1 (fr) |
| DE (1) | DE68923197T2 (fr) |
| ES (1) | ES2073459T3 (fr) |
| SE (2) | SE8800747D0 (fr) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0569814A1 (fr) * | 1992-05-13 | 1993-11-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Tube à décharge à basse pression |
| WO1999057749A3 (fr) * | 1998-05-06 | 2000-11-30 | Gl Displays Inc | Lampe fluorescente a cathode froide, et afficheur |
| US6201352B1 (en) | 1995-09-22 | 2001-03-13 | Gl Displays, Inc. | Cold cathode fluorescent display |
| US6211612B1 (en) | 1995-09-22 | 2001-04-03 | Gl Displays, Inc. | Cold cathode fluorescent display |
| US6310436B1 (en) | 1995-09-22 | 2001-10-30 | Gl Displays, Inc. | Cold cathode fluorescent lamp and display |
| US6316872B1 (en) | 1995-09-22 | 2001-11-13 | Gl Displays, Inc. | Cold cathode fluorescent lamp |
| US6515433B1 (en) | 1999-09-11 | 2003-02-04 | Coollite International Holding Limited | Gas discharge fluorescent device |
| WO2007085985A1 (fr) * | 2006-01-25 | 2007-08-02 | Koninklijke Philips Electronics N.V. | Lampe à décharge de gaz à basse pression tld |
| WO2011034483A1 (fr) * | 2009-09-16 | 2011-03-24 | Auralight International Ab | Tube fluorescent compact pour espaces froids |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19737920A1 (de) * | 1997-08-27 | 1999-03-04 | Walter Dipl Chem Dr Rer N Tews | Niederdruck-Gasentladungslampe mit erhöhter Lebensdauer |
| DE19842795A1 (de) * | 1998-09-18 | 2000-03-23 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Leuchtstofflampe |
| WO2001020642A1 (fr) * | 1999-09-11 | 2001-03-22 | Gl Displays, Inc. | Dispositif fluorescent a decharge gazeuse |
| SE0302595D0 (sv) * | 2003-09-30 | 2003-09-30 | Auralight Int Ab | Lysrör anpassat för kalla utrymmen |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3179792A (en) * | 1962-09-06 | 1965-04-20 | Weiss Harry | Fluorescent lamp |
| US3358167A (en) * | 1965-10-18 | 1967-12-12 | Gen Electric | Jacketed discharge lamp |
| US3987331A (en) * | 1975-03-24 | 1976-10-19 | Gte Sylvania Incorporated | Ultraviolet emitting fluorescent lamp having internal reflector film |
| US4001628A (en) * | 1976-02-25 | 1977-01-04 | Westinghouse Electric Corporation | Low-pressure fluorescent discharge device which utilizes both inorganic and organic phosphors |
| US4131589A (en) * | 1976-12-13 | 1978-12-26 | General Electric Company | Low temperature transmission room temperature vulcanizable silicone compositions |
| NL7811350A (nl) * | 1978-11-17 | 1980-05-20 | Philips Nv | Lagedruknatriumdampontladingslamp. |
| US4221693A (en) * | 1979-03-02 | 1980-09-09 | Getson John C | Composition free of surface cure inhibition and method for preparing the same |
| JPS59128752A (ja) * | 1983-01-12 | 1984-07-24 | Karupu Kogyo Kk | 螢光灯エンドキヤツプ用樹脂組成物 |
| DD253702A1 (de) * | 1983-12-19 | 1988-01-27 | Adl Inst Gemueseproduktion | Gasentladungsstrahler fuer effektive strahlungsemission bei niedrigen umgebungstemperaturen |
| US4710679A (en) * | 1985-12-06 | 1987-12-01 | Gte Laboratories Incorporated | Fluorescent light source excited by excimer emission |
-
1988
- 1988-03-02 SE SE8800747A patent/SE8800747D0/xx unknown
- 1988-06-17 EP EP88850215A patent/EP0330808A1/fr not_active Withdrawn
-
1989
- 1989-03-02 SE SE8900728A patent/SE467279B/sv unknown
- 1989-03-02 EP EP89850075A patent/EP0331660B1/fr not_active Expired - Lifetime
- 1989-03-02 ES ES89850075T patent/ES2073459T3/es not_active Expired - Lifetime
- 1989-03-02 DE DE68923197T patent/DE68923197T2/de not_active Expired - Lifetime
- 1989-03-02 AT AT89850075T patent/ATE124573T1/de not_active IP Right Cessation
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0569814A1 (fr) * | 1992-05-13 | 1993-11-18 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Tube à décharge à basse pression |
| US6452326B1 (en) | 1995-09-22 | 2002-09-17 | Gl Displays, Inc. | Cold cathode fluorescent lamp and display |
| US6201352B1 (en) | 1995-09-22 | 2001-03-13 | Gl Displays, Inc. | Cold cathode fluorescent display |
| US6211612B1 (en) | 1995-09-22 | 2001-04-03 | Gl Displays, Inc. | Cold cathode fluorescent display |
| US6310436B1 (en) | 1995-09-22 | 2001-10-30 | Gl Displays, Inc. | Cold cathode fluorescent lamp and display |
| US6316872B1 (en) | 1995-09-22 | 2001-11-13 | Gl Displays, Inc. | Cold cathode fluorescent lamp |
| US7474044B2 (en) | 1995-09-22 | 2009-01-06 | Transmarine Enterprises Limited | Cold cathode fluorescent display |
| US7919915B2 (en) | 1995-09-22 | 2011-04-05 | Transmarine Enterprises Limited | Cold cathode fluorescent display |
| WO1999057749A3 (fr) * | 1998-05-06 | 2000-11-30 | Gl Displays Inc | Lampe fluorescente a cathode froide, et afficheur |
| US6515433B1 (en) | 1999-09-11 | 2003-02-04 | Coollite International Holding Limited | Gas discharge fluorescent device |
| WO2007085985A1 (fr) * | 2006-01-25 | 2007-08-02 | Koninklijke Philips Electronics N.V. | Lampe à décharge de gaz à basse pression tld |
| CN101375368B (zh) * | 2006-01-25 | 2010-11-03 | 皇家飞利浦电子股份有限公司 | Tld低压气体放电灯 |
| WO2011034483A1 (fr) * | 2009-09-16 | 2011-03-24 | Auralight International Ab | Tube fluorescent compact pour espaces froids |
Also Published As
| Publication number | Publication date |
|---|---|
| DE68923197D1 (de) | 1995-08-03 |
| EP0331660A3 (fr) | 1991-01-23 |
| SE467279B (sv) | 1992-06-22 |
| ES2073459T3 (es) | 1995-08-16 |
| SE8900728L (sv) | 1989-09-03 |
| SE8900728D0 (sv) | 1989-03-02 |
| SE8800747D0 (sv) | 1988-03-02 |
| EP0331660B1 (fr) | 1995-06-28 |
| EP0330808A1 (fr) | 1989-09-06 |
| DE68923197T2 (de) | 1995-11-09 |
| ATE124573T1 (de) | 1995-07-15 |
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Free format text: ORIGINAL CODE: 0009012 |
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| AK | Designated contracting states |
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