WO1998032158A1 - Glühlampe mit reflexionsschicht - Google Patents
Glühlampe mit reflexionsschicht Download PDFInfo
- Publication number
- WO1998032158A1 WO1998032158A1 PCT/DE1998/000150 DE9800150W WO9832158A1 WO 1998032158 A1 WO1998032158 A1 WO 1998032158A1 DE 9800150 W DE9800150 W DE 9800150W WO 9832158 A1 WO9832158 A1 WO 9832158A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- bulb
- lamp bulb
- axis
- luminous element
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
Definitions
- This type of lamp is used in general lighting as well as for special lighting purposes, in combination with a reflector, for example in projection technology.
- IR layer for short - The rotationally symmetrical shape of the lamp bulb in conjunction with a coating reflecting IR radiation applied to its inside and / or outside surface - hereinafter referred to as IR layer for short - has the effect that a large part of the IR radiation power radiated from the luminous element is reflected back.
- the resulting increase in lamp efficiency can be used on the one hand with constant electrical power consumption for a temperature increase in the filament and consequently an increase in the luminous flux.
- a predetermined luminous flux can be achieved with lower electrical power consumption - an advantageous “energy-saving effect”.
- Another desirable effect is that, owing to the IR layer, significantly less IR radiation power is emitted through the lamp bulb and thus the surroundings are heated than in conventional incandescent lamps .
- the power density of the IR radiation components within the lamp bulb decreases with the number of reflections and consequently the efficiency of the incandescent lamp. It is therefore crucial for the increase in efficiency that can actually be achieved to minimize the number of reflections required for returning the individual IR rays to the luminous element.
- the lamp bulb provided with the IR layer is specially shaped.
- Corresponding helix shapes can only be realized to a very limited extent due to the limited ductility of the tungsten wire that is generally used for this.
- a cube-shaped helix is suggested as a rough but practical approximation for a sphere.
- the helix has the largest diameter in its center. This gradually decreases towards the two ends of the helix.
- EP-A 0 470 496 discloses a lamp with a spherical bulb, in the center of which a cylindrical luminous element is arranged.
- DE-OS 30 35 068 specifies a teaching for minimizing the inevitable aberration losses even in the latter embodiment. Thereafter, the two focal points of the ellipsoidal lamp bulb lie on the axis of the cylindrical luminous element and at predetermined distances from its respective ends.
- DE-OS 44 20 607 finally discloses a halogen incandescent lamp with a lamp bulb which is shaped as an ellipsoidal or ellipsoid-like barrel body and is provided with an IR layer.
- the ellipsoidal or possibly ellipsoid-like part of the contour of the barrel body is generated by an ellipse section, the small semiaxis b of which is arranged perpendicular to the longitudinal axis of the lamp, ie the axis of rotation of the lamp bulb.
- Au ⁇ ßerdem is the semi-minor axis of the generatrix is less than half the piston diameter d D / 2 and approximately around the radius / 2 of the luminous element is displaced parallel to the axis of rotation, which ultimately results in the barrel-shaped body.
- the length of the luminous element corresponds approximately to the distance between the two focal points of the generating ellipse section.
- the filament is positioned within the lamp bulb so that - in the representation of a longitudinal section - the two focal points with the two corresponding corner points of the filament approximately coincide. However, this heats the filament unevenly.
- Another disadvantage of this solution is that the improvement in lamp efficiency that can be achieved depends relatively strongly on the dimensioning and positioning of the luminous element within the lamp bulb.
- the invention is based on the object of eliminating the disadvantages mentioned and of specifying an incandescent lamp which is distinguished by efficient return of the emitted IR radiation to the luminous element and consequently high efficiency.
- compact lamp dimensions with high luminance levels should be made possible, as is sought in particular for low-voltage halogen incandescent lamps.
- FIG. 1 shows a schematic representation of the basic relationships and introduces some parameters that are essential for understanding the invention.
- an ellipse 1 is shown with the large and the small semiaxis a and b as well as with the two focal points F and F 2 .
- the contour of the rotationally symmetrical lamp bulb 2 (shown very schematically; the current leads and the squeezes) are not shown for the sake of simplification) essentially by an ellipse section 3 (shown in FIG. 1 by a larger line width). raised) of the ellipse 1, the ellipse section 3 being specifically selected so that the large semi-axis a is oriented perpendicular to the axis of rotation RA of the lamp bulb 2.
- a luminous element 4 with a rotationally symmetrical, for example circular-cylindrical, outer contour (shown as a rectangle in the schematic longitudinal section in FIG. 1) is arranged centrally axially inside the lamp bulb 2.
- the focal axis F, F 2 - that is the straight line connecting the two focal points F,, F 2 of the generators 3 - is oriented perpendicular to the axis of rotation RA of the lamp bulb 2.
- the large semi-axis a of the generatrix is longer than the radius R of the lamp bulb 2.
- the lamp bulb 2 no longer has the shape of a "real" rotational ellipsoid.
- the length of the large semi-axis a is selected from the range R ⁇ a ⁇ R + 5 - w r , in particular from the range R + ⁇ v r ⁇ a ⁇ R -f- 3 - w r .
- R and w r denote the largest radius of the lamp bulb 2 or the radius of the cylindrical or cylinder-like luminous element 4.
- the small semi-axis b of the generating ellipse section 3 is approximately twice the length of the luminous element 4.
- Figure 2a corresponds essentially to the conditions in DE-OS 30 35 068. It shows an ellipsoidal lamp bulb 5, in the interior of which a luminous element 6 is arranged axially in the center such that the two focal points F, and F 2 of the ellipsoid of revolution with the ends of the filament 6 coincide.
- the focal axis F j F 2 is consequently parallel to the rotary onsachse RA of the lamp bulb 5 oriented, in contrast to the present invention.
- FIG. 2b finally shows the conditions in DE-OS 44 20 607 again.
- the lamp bulb 7 is shaped as an ellipsoidal or ellipsoidal barrel body.
- the schematic sectional illustration shows two ellipse halves which are connected to one another by means of two straight sections.
- the focal pairs F,, F 2 and F, ', F 2 ' of the two ellipse halves coincide with the corner points of the luminous element 8. Consequently, the focal axes F, F 2 and F, 'F 2 ' - again in contrast to the present invention - are oriented parallel to the axis of rotation RA of the lamp bulb.
- An advantage of the present invention - in addition to the increase in efficiency - is the likewise increased uniformity with which the IR radiation is reflected back onto the coil. This prevents local overheating, which can lead to premature destruction of the filament. It is also advantageous that the achievable improvement in lamp efficiency compared to DE-OS 44 20 607 is less dependent on production-related fluctuations in the positioning of the filament within the bulb.
- Axially arranged single or double filaments made of tungsten are used as the illuminant.
- the geometric dimensioning i.e. diameter, pitch and length, depends, among other things, on the desired electrical resistance R of the filament and this in turn on the desired electrical power consumption P for a given supply voltage U.
- P U 2 / R
- the filaments are high voltage (HV) lamps usually longer than low-voltage (NV) types.
- the luminous element is connected in an electrically conductive manner to two power supply lines, both of which are routed gas-tight to the outside either together at one end of the lamp bulb or separately at the two opposite ends of the lamp bulb.
- the seal is generally made using a pinch.
- another sealing technique is also possible, for example a plate melting.
- the version closed on one side is particularly suitable for LV applications. In this case, very compact lamp dimensions can be realized due to the relatively short illuminants.
- the largest possible part of the bulb wall can be used as an effective reflection surface.
- This can be achieved in particular in that the lamp bulb has a lamp neck at one or possibly at both ends in the area of the current leadthrough.
- the lamp neck surrounds the current feedthrough as closely as possible and merges into a seal. Details on this can be found in DE-OS 44 20 607.
- the lamp bulb is usually filled with inert gas, for example with N 2 , Xe, Ar and / or Kr.
- inert gas for example with N 2 , Xe, Ar and / or Kr.
- halogen additives which maintain a tungsten-halogen cycle in order to counteract blackening of the bulb.
- the lamp bulb is made of a translucent material, such as quartz glass.
- the lamp can be operated with an outer bulb. If a particularly strong reduction in the IR power emitted into the environment is desired, this can also have an IR layer.
- the IR layer can be used, for example, as an interference filter known per se - usually a sequence of alternating dielectric layers underneath different refractive indices.
- the basic structure of suitable IR layers is explained, for example, in EP-A 0 470 496.
- FIG. 1 shows a schematic representation of the principle of the invention
- FIG. 2 shows a schematic illustration of the prior art
- FIG. 3 shows an exemplary embodiment of a low-voltage halogen incandescent lamp with an IR layer and a filament with internal feedback and a bulb shape that is optimized in accordance with the invention.
- a first embodiment of a lamp 9 according to the invention is shown schematically. It is a halogen incandescent lamp with a nominal voltage of 12 V and a nominal power of 35 W. It consists of a lamp bulb 10 squeezed on one side, which is shaped as an elliptical-like body.
- the generatrix of the ellipsoidal partial contour of the lamp bulb 10 is an ellipse section, the large semi-axis of which is 7.4 mm long and oriented perpendicular to the longitudinal axis of the lamp 9.
- the small semi-axis of the generators is 6.3 mm long.
- the lamp bulb 10 is made of quartz glass with a wall thickness of approximately 1 mm and has a largest outer diameter of 12 mm.
- the lamp bulb 10 merges into a neck 11 which ends in a pinch seal 12.
- the lamp bulb 10 has a pump tip 13.
- an IR layer 14 is applied, consisting of an interference filter with more than 20 layers of O 2 and SiO 2.
- the IR layer also additionally covers about half of the pinch seal 12. In this way, one becomes special Dimensionally stable shape of the IR layer 14 is achieved, since in the manufacture of the lamp bulb 10 the outer surface of the calculated contour of the ellipsoidal body is impressed.
- the individual layers in the region of the piston surface are particularly uniform. This reduces color errors.
- the length of the lamp neck 11 is approximately 2.5 mm with an outer diameter of approximately 6 mm.
- the luminous element 15 is made of tungsten wire with a diameter of 152 ⁇ m.
- the tungsten wire is wound into a simple helix with a pitch of 243 ⁇ m.
- the power supply lines 16a, b are formed directly by the spiral wire and connected to molybdenum foils 17a, b in the pinch seal 12.
- the molybdenum foils 17a, b are in turn connected to outer socket pins 18a, b.
- the first power supply line 16a is guided almost parallel to the longitudinal axis of the lamp and essentially in alignment with the outer surface of the luminous element 15.
- the second power supply line 16b of the luminous element 15 is bent towards the longitudinal axis of the lamp and runs centrally along the axis of the turns of the luminous element 15, i.e. inside the helix, to the end remote from the base. In this way, any shadowing of the radiation by a power supply is avoided.
- the lamp 9 has a color temperature of approx. 3050 K.
- the luminous flux is 1000 Im, corresponding to a luminous efficacy of approx. 28 lm / W.
- an electrical power consumption of approx. 50 W is required for the same luminous flux. Consequently, in In comparison, up to 42% of the electrical power can be saved with the lamp according to the invention.
- Two further exemplary embodiments for a 50 W or 65 W halogen incandescent lamp - also for 12 V operation - differ only in the ellipse parameters of the generators for the lamp bulbs and in the filament parameters.
- the structure corresponds in each case to that of FIG. 1.
- the following table compares the parameters mentioned for the three exemplary embodiments.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59806689T DE59806689D1 (de) | 1997-01-20 | 1998-01-19 | Glühlampe mit reflexionsschicht |
JP53352898A JP4229985B2 (ja) | 1997-01-20 | 1998-01-19 | 反射膜を備えた電球 |
US09/142,580 US6111344A (en) | 1997-01-20 | 1998-01-19 | Incandescent lamp with reflection coating |
CA002249720A CA2249720C (en) | 1997-01-20 | 1998-01-19 | Incandescent lamp with reflection coating |
EP98906823A EP0894336B1 (de) | 1997-01-20 | 1998-01-19 | Glühlampe mit reflexionsschicht |
HU0000618A HU222331B1 (hu) | 1997-01-20 | 1998-01-19 | Villamos izzólámpa fényvisszaverő réteggel |
KR10-1998-0707059A KR100391936B1 (ko) | 1997-01-20 | 1998-01-19 | 반사코팅이된백열전등 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19701794A DE19701794A1 (de) | 1997-01-20 | 1997-01-20 | Glühlampe mit Reflexionsschicht |
DE19701794.0 | 1997-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998032158A1 true WO1998032158A1 (de) | 1998-07-23 |
Family
ID=7817816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000150 WO1998032158A1 (de) | 1997-01-20 | 1998-01-19 | Glühlampe mit reflexionsschicht |
Country Status (9)
Country | Link |
---|---|
US (1) | US6111344A (de) |
EP (1) | EP0894336B1 (de) |
JP (1) | JP4229985B2 (de) |
KR (1) | KR100391936B1 (de) |
CN (1) | CN1146013C (de) |
DE (2) | DE19701794A1 (de) |
HU (1) | HU222331B1 (de) |
TW (1) | TW355809B (de) |
WO (1) | WO1998032158A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008009152U1 (de) | 2008-07-08 | 2008-09-11 | Osram Gesellschaft mit beschränkter Haftung | Halogenglühlampe |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844519C2 (de) | 1998-09-28 | 2000-08-03 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Elektrische Glühlampe mit IR-Reflexionsschicht |
DE10318051A1 (de) * | 2003-04-17 | 2004-11-04 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Halogenglühlampe |
DE102004043176B4 (de) * | 2004-09-03 | 2014-09-25 | Osram Gmbh | Infrarotscheinwerfer |
DE102005019113A1 (de) | 2005-04-25 | 2006-10-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Halogenglühlampe und Verfahren zu ihrer Herstellung |
DE202007017598U1 (de) * | 2007-12-18 | 2008-07-31 | Osram Gesellschaft mit beschränkter Haftung | Halogenglühlampe mit IRC-Beschichtung |
DE102007060839A1 (de) | 2007-12-18 | 2009-06-25 | Osram Gesellschaft mit beschränkter Haftung | Leuchtkörper und Lampe mit einem eindimensionalen photonischen Kristall |
DE102008032167A1 (de) | 2008-07-08 | 2010-01-14 | Osram Gesellschaft mit beschränkter Haftung | Halogenglühlampe |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4041344A (en) * | 1976-08-30 | 1977-08-09 | General Electric Company | Ellipsoidal reflector lamp |
GB2082383A (en) * | 1980-08-20 | 1982-03-03 | Duro Test Corp | Incandescent lamp with ellipsoidal envelope |
GB2144579A (en) * | 1983-08-01 | 1985-03-06 | Gen Electric | Incandescent lamps |
EP0237104A1 (de) * | 1986-03-11 | 1987-09-16 | Koninklijke Philips Electronics N.V. | Geblasener Lampenkolben und mit einem solchen Kolben versehene elektrische Lampe |
EP0281185A1 (de) * | 1987-02-25 | 1988-09-07 | Koninklijke Philips Electronics N.V. | Elektrische Glühlampe und geblasener Glaskolben dafür |
US4988911A (en) * | 1988-10-17 | 1991-01-29 | Miller Jack V | Lamp with improved photometric distribution |
DE4420607A1 (de) * | 1994-06-13 | 1995-12-14 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Elektrische Glühlampe und Leuchtkörper für Glühlampen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4160929A (en) * | 1977-03-25 | 1979-07-10 | Duro-Test Corporation | Incandescent light source with transparent heat mirror |
FR2465313B1 (fr) * | 1979-09-17 | 1986-04-11 | Duro Test Corp | Enveloppe ellipsoidale pour lampe a incandescence, comprenant des moyens de renvoi de l'energie infrarouge |
EP0470496A3 (en) * | 1990-08-07 | 1992-08-26 | Toshiba Lighting & Technology Corporation | Incandescent lamp and reflector type projection lamp |
-
1997
- 1997-01-20 DE DE19701794A patent/DE19701794A1/de not_active Withdrawn
- 1997-12-30 TW TW086119962A patent/TW355809B/zh not_active IP Right Cessation
-
1998
- 1998-01-19 HU HU0000618A patent/HU222331B1/hu not_active IP Right Cessation
- 1998-01-19 KR KR10-1998-0707059A patent/KR100391936B1/ko not_active IP Right Cessation
- 1998-01-19 CN CNB988000474A patent/CN1146013C/zh not_active Expired - Lifetime
- 1998-01-19 EP EP98906823A patent/EP0894336B1/de not_active Expired - Lifetime
- 1998-01-19 JP JP53352898A patent/JP4229985B2/ja not_active Expired - Fee Related
- 1998-01-19 DE DE59806689T patent/DE59806689D1/de not_active Expired - Lifetime
- 1998-01-19 WO PCT/DE1998/000150 patent/WO1998032158A1/de active IP Right Grant
- 1998-01-19 US US09/142,580 patent/US6111344A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4041344A (en) * | 1976-08-30 | 1977-08-09 | General Electric Company | Ellipsoidal reflector lamp |
GB2082383A (en) * | 1980-08-20 | 1982-03-03 | Duro Test Corp | Incandescent lamp with ellipsoidal envelope |
GB2144579A (en) * | 1983-08-01 | 1985-03-06 | Gen Electric | Incandescent lamps |
EP0237104A1 (de) * | 1986-03-11 | 1987-09-16 | Koninklijke Philips Electronics N.V. | Geblasener Lampenkolben und mit einem solchen Kolben versehene elektrische Lampe |
EP0281185A1 (de) * | 1987-02-25 | 1988-09-07 | Koninklijke Philips Electronics N.V. | Elektrische Glühlampe und geblasener Glaskolben dafür |
US4988911A (en) * | 1988-10-17 | 1991-01-29 | Miller Jack V | Lamp with improved photometric distribution |
DE4420607A1 (de) * | 1994-06-13 | 1995-12-14 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Elektrische Glühlampe und Leuchtkörper für Glühlampen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008009152U1 (de) | 2008-07-08 | 2008-09-11 | Osram Gesellschaft mit beschränkter Haftung | Halogenglühlampe |
Also Published As
Publication number | Publication date |
---|---|
EP0894336B1 (de) | 2002-12-18 |
CN1216155A (zh) | 1999-05-05 |
HU222331B1 (hu) | 2003-06-28 |
EP0894336A1 (de) | 1999-02-03 |
US6111344A (en) | 2000-08-29 |
KR20000064566A (ko) | 2000-11-06 |
TW355809B (en) | 1999-04-11 |
DE59806689D1 (de) | 2003-01-30 |
CN1146013C (zh) | 2004-04-14 |
HUP0000618A3 (en) | 2001-10-29 |
DE19701794A1 (de) | 1998-07-23 |
JP2000507389A (ja) | 2000-06-13 |
JP4229985B2 (ja) | 2009-02-25 |
HUP0000618A2 (hu) | 2000-06-28 |
KR100391936B1 (ko) | 2003-09-19 |
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