WO1996016431A1 - Enveloppe pour lampe compacte - Google Patents

Enveloppe pour lampe compacte Download PDF

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Publication number
WO1996016431A1
WO1996016431A1 PCT/EP1995/004384 EP9504384W WO9616431A1 WO 1996016431 A1 WO1996016431 A1 WO 1996016431A1 EP 9504384 W EP9504384 W EP 9504384W WO 9616431 A1 WO9616431 A1 WO 9616431A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas discharge
discharge tubes
tubes
discharge vessel
lamp
Prior art date
Application number
PCT/EP1995/004384
Other languages
German (de)
English (en)
Inventor
Hans-Wolfgang Schifferdecker
Erhard Bernicke
Original Assignee
Promatec Gmbh Berlin
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 Promatec Gmbh Berlin filed Critical Promatec Gmbh Berlin
Publication of WO1996016431A1 publication Critical patent/WO1996016431A1/fr

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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
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path

Definitions

  • the invention relates to a discharge vessel for a compact low-pressure discharge lamp according to the preamble of claim 1.
  • Low-pressure discharge lamps in particular fluorescent lamps, are widely used for electrical light generation. Compared to incandescent lamps, they are characterized by a higher luminous efficacy and a longer service life.
  • the generation of light in low-pressure discharge lamps takes place via the process of a gas discharge in a discharge vessel: electrons accelerated in an electric field excite gas atoms through collisions, which release the excitation energy absorbed after a short time in the form of UV light quanta, which in turn is contained in the phosphor which is applied to the inner walls of the discharge vessel , be converted into visible light.
  • a certain length of the discharge path and thus of the discharge vessel is essential for the efficiency of the light generation.
  • Geometrically small lamps make it necessary to fold the discharge path.
  • Such low-pressure discharge lamps which are distinguished by a folded discharge path and thus small dimensions, are referred to as compact lamps.
  • the discharge path is realized by a series of two or more U-tubes, the U-tubes being connected to one another by a discharge channel.
  • a compact fluorescent lamp which consists of a discharge vessel, a main body and a base.
  • the discharge vessel consists of U-shaped, -shaped or saddle-shaped curved gas discharge tubes, which are arranged at the same distance from the center axis or in a star shape around the center axis of the fluorescent lamp and are connected to one another via gas discharge channels.
  • the gas discharge tubes arranged at the same center distance, there is a large free interior with the cylindrical outer surface of the discharge vessel being largely closed, which leads to a correspondingly large outer circumference of the compact lamp and thus limits its possible uses as a replacement for an incandescent lamp.
  • the star-shaped arrangement of the gas discharge tubes requires a complicated geometric shape of the gas discharge tubes and leads to an outer surface which is unfavorable for the light radiation.
  • a low-pressure discharge lamp with a discharge vessel which consists of several Rohrseg ⁇ elements, which are connected gas-tight by means of glass solder.
  • the tube segments connected to one another by U-shaped or trapezoidal reversal points are arranged in a meandering shape around the central axis of the low-pressure discharge lamp and form a polygon, the plane spanned between the tube segments connected to one another including an angle dependent on the number of tube segments, so that a closed polygonal contour is formed.
  • This configuration of the tube segments of a discharge vessel also includes a large interior space, which requires a corresponding volume of the discharge vessel, so that here too the replacement of incandescent lamps by the low-pressure discharge lamp known from this publication is limited.
  • the arrangement of the reversal points for connecting the tube segments and their gas-tight connection to the tube segments necessitates a high manufacturing outlay and nevertheless includes the risk of leaks in the gas discharge vessel and thus the lack of functional reliability of the low-pressure discharge lamp.
  • DE 33 11 457 C2 discloses a discharge vessel with three gas discharge tubes which are connected to one another via gas discharge channels and have U-shaped curved gas discharge tubes, the legs of which span planes running parallel to one another.
  • the clear width between the legs of the central gas discharge tubes is greater than the clear width between the legs of the two outer gas discharge tubes, which have the same height, so that the discharge vessel can be inserted into a cylindrical bulb.
  • GB 21 76 648 A discloses a discharge vessel for a compact low-pressure discharge lamp with three gas discharge tubes which are connected to one another via gas discharge channels and whose legs span parallel planes between them.
  • the individual gas discharge tubes have both the same height and the same leg spacing.
  • the object of the present invention is to create a discharge vessel for a compact low-pressure discharge lamp which is suitable for a large power spectrum and has a large light-emitting outer surface with a small construction volume and can be optimally adapted to the shape of a conventional incandescent lamp.
  • the solution according to the invention results in a discharge vessel for compact low-pressure discharge lamps with an essentially closed, light-emitting outer surface, the external dimensions of which are minimal due to the graded height of the gas discharge tubes, so that the compact low-pressure discharge lamps can be optimally adapted to the shape of conventional incandescent lamps and can be used in the full power spectrum of conventional incandescent lamps with minimal power consumption.
  • An advantageous embodiment of the invention is characterized in that the leg distance of the gas discharge tubes from the central gas discharge tube (s) to the outer gas discharge tubes decreases.
  • a further variant of the solution according to the invention is characterized in that the height and the leg spacing of the middle and outer gas discharge tubes is dimensioned such that the outer gas discharge tubes run at least partially within the clear width of the middle gas discharge tube (s) such that the projections of the individual gas discharge tubes on the base body of the gas discharge tubes partially overlap.
  • the nesting of the gas discharge tubes creates a minimal outer circumference of the discharge vessel, so that a closed, light-emitting outer surface is created with a minimal footprint, which enables the compact low-pressure discharge lamp to be used instead of an incandescent lamp even when space is limited.
  • a further embodiment of the discharge vessel according to the invention is characterized in that the axes of the gas discharge tubes are geometrically arranged on the corner points of an even polygon and have essentially the same distance from one another, in particular, that the axes of the gas discharge tubes are geometrically arranged on a circle, the center of which lies in the axis of symmetry of the discharge vessel.
  • the arrangement of the axes of the gas discharge tubes on the corner points of an even polygon creates a regular structure of the discharge vessel, so that an even more closed, light-emitting outer surface is created with a minimal footprint.
  • the interior of the discharge vessel is kept to a minimum, so that the base area required for the main body or the base sleeve is very small.
  • Fig. 1 - a schematic perspective view of a compact low-pressure discharge lamp compared to an incandescent lamp
  • FIG. 2 shows a horizontal section through a discharge vessel with three U-shaped gas discharge tubes arranged parallel to one another;
  • FIG. 3 shows a horizontal section through a discharge vessel with four U-shaped gas discharge tubes arranged parallel to one another;
  • FIG. 4 shows a schematic side view of part of a discharge vessel with two gas discharge tubes of different heights arranged parallel to one another; 5 to 7 - side views and a top view of a compact lamp with four partially nested U-shaped gas discharge tubes;
  • the compact low-pressure discharge lamp shown in FIG. 1 in a schematic perspective view has a cylindrical base body 1, the upper side of which is connected to a discharge vessel 2 with a plurality of U-shaped gas discharge tubes and the lower side of which is shaped like a truncated cone with a lamp base 3.
  • the lamp base 3 can optionally be designed as a screw base or a bayonet base in a manner known per se.
  • incandescent lamp 4 shown in broken lines, so that the low-pressure discharge lamp is suitable for replacing incandescent lamps of the same radiation power with a significantly reduced power consumption there as well , where the space available for receiving the lamp is small and adapted to that of the incandescent lamp.
  • This compact design of the low-pressure discharge lamp is essentially determined by the size of the discharge vessel 2 and the base body 1, since the lamp base 3 is predetermined because of the lamp holders available for accommodating incandescent lamps. Measures to minimize the construction volume of the discharge vessel 2 are shown and explained below with reference to FIGS. 2 to 8.
  • FIG. 2 shows a horizontal section through a discharge vessel with three U-shaped gas discharge tubes 21, 22, 24, whose planes formed between the legs of the U-shaped gas discharge tubes are parallel to one another. fen.
  • the middle gas discharge tube 22 has a larger center distance of the two tube legs, which is larger than the center distance of the tube legs of the two outer gas discharge tubes 21, 24. Via gas discharge channels 51, 52, the middle gas discharge tube 22 with the two outer gas discharge tubes 21, 24 connected.
  • the axes A of the legs of the gas discharge tubes 21, 22, 24 lie on a circle K1, the center of which coincides with the center axis of the discharge vessel.
  • axes of the individual legs of the gas discharge tubes 21, 22, 24 arranged on a circle K1 their arrangement on the corner points of an even polygon is also possible, the distance between the axes being constant.
  • FIG. 3 shows a horizontal section through a discharge vessel with four gas discharge tubes 21, 22, 23, 24 arranged parallel to one another, of which the two middle, U-shaped gas discharge tubes 22, 23 have a larger leg distance than the two outer gas discharge tubes
  • the axes of the parallel legs of the gas discharge tubes 21, 22, 23, 24 are located on the corner points of an even polygon or - as shown in FIG. 3 - on a circle K2, the center of which is defined by the central axis of the Discharge vessel goes.
  • the center distance a of the two legs of the two outer gas discharge tubes 21, 24 and the center distance between the individual gas discharge tubes 21, 22, 23, 24 is constant, so that with the uniform division of the legs of the gas discharge tubes 21, 22, 23, 24 one A closed outer contour is created, which enables optimal light emission, while at the same time the interior enclosed between the gas discharge tubes 21, 22, 23, 24 and thus the circumference of the discharge vessel is minimal.
  • a variable height of the gas discharge tubes provides a further approximation to the longitudinal sectional contour of an incandescent lamp according to FIG. 1, so that the possible uses of a compact low-pressure discharge lamp with a discharge vessel shaped in this way are further improved.
  • the distance a between the U-shaped arcs of the individual gas discharge tubes is preferably equal to the axis distance of the parallel legs of the gas discharge tubes.
  • FIGS. 5 to 8 show a compact lamp with a discharge vessel 2 consisting of four U-shaped gas discharge tubes 21, 22, 23, 24 connected to one another via cross-connections, which is distinguished by a particularly compact design of the discharge vessel 2.
  • the compact lamp consists of the discharge vessel 2, which is formed from the four U-shaped discharge tubes 21, 22, 23, 24 arranged parallel to one another, and a base body 1, which has a base designed as a screw socket, analogously to that of incandescent lamps used screw socket is provided.
  • the main body 1 has the ballast electronics in a likewise compact design.
  • the two outer gas discharge tubes 21, 24 have a lower height and a smaller leg distance than the two middle gas discharge tubes 22, 23 , so that the two outer gas discharge tubes 21, 24 can be arranged partially within the middle gas discharge tubes 22, 23.
  • the distance between the outer walls of the two outer gas discharge tubes 21, 24 is reduced in order to reduce the circumferential area of the compact lamp formed in this way.
  • the top view according to FIG. 7 shows that the outline which comprises the discharge vessel formed from the four discharge tubes 21, 22, 23, 24 lies clearly within the cylindrical base body 1.
  • the individual gas discharge tubes 21 to 24 are connected via cross-connections which are produced analogously to the method described above.
  • the cross connection 54 between the two middle gas discharge tubes 22, 23 is shown, while the cross connections between the outer and the middle gas discharge tubes 21, 22 and 23, 24 as a result of the covered or ge ⁇ nested arrangement of the gas discharge tube are not recognizable.

Abstract

Dans une lampe compacte munie d'une enveloppe (2), comprenant plusieurs tubes à gaz (21, 22, 23, 24) cintrés en U et reliés les uns aux autres par l'intermédiaire de canaux de décharge gazeuse, dont les parois intérieures sont recouvertes d'une substance luminescente, ainsi qu'un corps de base (1) et un culot (3), les plans s'étendant entre les branches des tubes à gaz (21, 22, 23, 24) cintrés en U, sont parallèles les uns aux autres et les axes des tubes à gaz (21, 22, 23, 24) sont situés de manière géométrique sur les points d'angles d'un polygone ayant un nombre pair de côtés et présentent sensiblement le même écart les uns par rapport aux autres. En complément ou en variante, les tubes à gaz (21, 22, 23, 24) sont disposés au moins en partie de manière intercalée.
PCT/EP1995/004384 1994-11-17 1995-11-08 Enveloppe pour lampe compacte WO1996016431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4442203.2 1994-11-17
DE19944442203 DE4442203A1 (de) 1994-11-17 1994-11-17 Entladungsgefäß für eine Kompaktlampe

Publications (1)

Publication Number Publication Date
WO1996016431A1 true WO1996016431A1 (fr) 1996-05-30

Family

ID=6534277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004384 WO1996016431A1 (fr) 1994-11-17 1995-11-08 Enveloppe pour lampe compacte

Country Status (2)

Country Link
DE (1) DE4442203A1 (fr)
WO (1) WO1996016431A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19757787A1 (de) * 1997-12-10 1999-06-17 Holzer Walter Prof Dr H C Ing Gasentladungsgefäße für Energiesparlampen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601893A1 (fr) * 1992-12-11 1994-06-15 Flowil International Lighting (Holding) B.V. Lampe fluorescente

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172857A (ja) * 1982-03-31 1983-10-11 Matsushita Electric Works Ltd 螢光ランプ
DE3307780A1 (de) * 1983-03-04 1984-09-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Einseitig gesockelte niederdruckentladungslampe und verfahren zur herstellung
DE3437212A1 (de) * 1984-10-10 1986-04-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Einseitig gesockelte niederdruckentladungslampe
US4958102A (en) * 1984-12-27 1990-09-18 North American Philips Corporation Three way gas discharge lamp
NL8501340A (nl) * 1985-05-10 1986-12-01 Philips Nv Lagedrukkwikdampontladingslamp.
JPS6276149A (ja) * 1985-09-28 1987-04-08 Toshiba Corp けい光ランプ装置
NL8600252A (nl) * 1986-02-03 1987-09-01 Philips Nv Lagedrukkwikdampontladingslamp.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601893A1 (fr) * 1992-12-11 1994-06-15 Flowil International Lighting (Holding) B.V. Lampe fluorescente

Also Published As

Publication number Publication date
DE4442203A1 (de) 1996-05-23

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