EP1859473A1 - Lamp with screening device - Google Patents
Lamp with screening deviceInfo
- Publication number
- EP1859473A1 EP1859473A1 EP06705945A EP06705945A EP1859473A1 EP 1859473 A1 EP1859473 A1 EP 1859473A1 EP 06705945 A EP06705945 A EP 06705945A EP 06705945 A EP06705945 A EP 06705945A EP 1859473 A1 EP1859473 A1 EP 1859473A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- shading device
- vessel
- lamp according
- section
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
- H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
- H01J5/56—Shape of the separate part
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
- H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
Definitions
- the invention relates to a lamp according to the preamble of patent claim 1.
- Such a lamp is disclosed for example in DE 101 45 427 Al.
- This document describes a halogen incandescent lamp for a vehicle headlight.
- the halogen incandescent lamp has two arranged inside a lamp vessel Glühwen- you and a shading device, which is also disposed within the lamp vessel and used to shadow part of the light generated by one of the two filaments.
- the lamp according to the invention has at least one light source arranged inside a lamp vessel and a shading device, the lamp vessel being fixed in a holder part of a lamp base and the shading device enclosing a portion of the lamp vessel protruding from the holder part. This reduces the beam angle of the lamp and the emission of stray light.
- the portion of the lamp vessel enclosed by the shading device advantageously comprises the sealed end since disturbing stray light emerges from this sealed end.
- the shading device additionally encloses a transition section of the lamp vessel which is arranged between the sealed lamp vessel
- the shading device additionally encloses also a part of the rotationally symmetrical lamp vessel section in order to reduce the emission of unwanted scattered light.
- the invention is particularly advantageous for lamps whose lamp vessel is provided with filter means, for example an interference-filter coating, in order to reduce the transmission of the lamp vessel for electromagnetic radiation from a predetermined wavelength range.
- the shading device replaces the filter means when the filter means on the lamp vessel portion near the support member, in particular on the above-mentioned sealed lamp vessel end and the transition portion between the lamp vessel end and a rotationally symmetrical lamp vessel portion, have no or only insufficient effect.
- the shading device is advantageously of annular design in order to ensure complete shading of the electromagnetic radiation emerging from the lamp vessel section enclosed by the shading device.
- the shading device is advantageously connected to a lamp base part in order to ensure secure anchoring of the shading device to the lamp.
- the shading device and the corresponding lamp base part are made of metal, so that the connection can be made in a simple manner by at least one weld.
- the metal shading device also has the advantage of high heat resistance and electromagnetic radiation immunity from the entire spectrum generated by the lamp.
- the shading device is connected either to the support part or to an adjustment sleeve of the lamp base or else the shading device itself is designed as an adjustment sleeve. det, which in turn rests on a flange of the lamp cap and is connected thereto.
- the annular shading device preferably has a reduced diameter in the region of the lamp vessel section enclosed by it, so that it closely surrounds the lamp vessel and thereby improves the shading effect and avoids the penetration of dirt.
- Figure 1 shows a longitudinal section through a lamp according to the first exemplary embodiment of the invention
- FIG. 2 shows a longitudinal section through the shading device of the lamp depicted in FIG.
- Figure 3 is a plan view of the shading device shown in Figure 2
- Figure 4 shows a longitudinal section through a lamp according to the second embodiment of the invention
- FIG. 5 shows an enlarged view of a section of the shading device shown in FIG. 4 and of the lamp cap
- Figure 6 shows a detail of the shading device and the lamp cap according to the third embodiment of the invention
- first embodiment of the invention is an incandescent lamp, preferably a halogen incandescent lamp, which is used as an infrared radiator in an infrared vehicle headlamp, which is part of an infrared night vision device.
- This incandescent lamp has a glassy lamp vessel 1 which has a sealed end 10 from which two power supply lines 2, 3 for an incandescent filament 4 arranged inside the lamp vessel 1 are led out.
- the sealed end 10 is formed as a pinch seal, the penpengefhrenes 1 through a transition portion 11 of the lamp with a, the filament 4 enclosing, rotationally symmetric portion 12 of the lamp vessel 1 is connected.
- the outer surface of the rotationally symmetric, preferably ellipsoidal portion 12 of the lamp vessel 1 is coated with an interference filter (not shown) that is transparent to infrared radiation and impermeable to light.
- the pinch seal 10 of the lamp vessel 1 is fixed in an annular support member 50, which is formed as part of the lamp cap 5.
- the lamp base 5 is formed as a metal base.
- the metallic mounting part 50 it comprises an annular adjusting sleeve 51 and a base flange 52 as well as two contact lugs 6, 7 and a base block 53 made of an electrically insulating material.
- the contact lugs 6, 7 are each connected to one of the power supply lines 2, 3 electrically connected and form the electrical connections of the light bulb.
- the pedestal 53 is used for electrical insulation between the tabs and the metallic lamp base parts 50, 51 and 52.
- the annular adjusting sleeve 51 is welded to the annular support member 50 and has an annular rim 510 which rests on the base flange 52 and is welded thereto.
- the incandescent lamp 1 is provided with an annular, metallic shading device 8, which has two ring sections 81, 82 with different diameters.
- the first ring section 81 encloses the section of the pinch seal 10 projecting from the mounting part 50 and the transition section 11 and a small part of the rotationally symmetrical lamp vessel section 12.
- the second ring section 82 encloses the mounting part 50 and the alignment sleeve 51.
- the alignment sleeve 51 is in the range the three openings 80 in the shading device 8 welded to the support member 50.
- the second ring portion 82 is welded to the adjustment sleeve 51.
- This assembly is placed on the base flange 52 together with the adjustment sleeve 51, adjusted and welded.
- the diameters of the annular portion 82 of the shading device 8 of the adjusting sleeve 51 and the support member 50 are coordinated so that a displacement of the parts along the ring axis is possible.
- the Justierhülse 51 is placed on the base flange 52 in the correct position and the rim 510 welded to the base flange.
- the shading device 8 is placed on the adjusting sleeve 51 in the correct position and welded to the adjusting sleeve 51.
- the first ring section 81 of reduced diameter closely encloses the above-mentioned lamp vessel sections 10, 11, 12. It prevents light from escaping from the non-rotationally symmetrical lamp barrel sections 10, 11, which do not have an interference filter coating, or where the interference filter coating is only insufficiently effective.
- the annular edge of the first ring section 81 is provided with a chamfer.
- FIG. 4 shows a longitudinal section through an incandescent lamp according to the second embodiment of the invention is shown schematically.
- This incandescent lamp differs from that of the first exemplary embodiment depicted in FIG. 1 only in that the lamp cap 5 'has no adjusting sleeve and the shading device 8' in the second exemplary embodiment also assumes the function of the adjusting sleeve 51 of the first exemplary embodiment.
- the lamps according to the first and second embodiments are the same. Therefore, in the figures 1 and 4 identical components are designated by the same reference numerals.
- the shading device 8 ' has two ring sections 81', 82 'with different diameters and a rim 83', which rests on the base flange 52 and is welded thereto.
- the first ring portion 81 ' encloses the In order to avoid injury to the glass surface or the interference filter coating applied thereon, the annular edge of the first ring section 81 'is provided with a chamfer.
- the section of the pinch seal 10 protrudes from the holder part 50 .
- the second ring portion 82 ' encloses the support member 50 and is welded thereto.
- the support member 50 is disposed within the shading device 8 ', which is formed here as part of the lamp cap 5' and assumes the function of the adjustment sleeve.
- FIG. 5 shows an enlarged detail of the holder part 50, the pinch seal 10 and the shading device 8 '.
- the shading device 8 ' is placed on the pinch seal 10 before the mounting part 50 is mounted on the pinch foot 10.
- the assembly consisting of the sealed lamp vessel 1 with incandescent filament 4, power supply lines 2, 3, support member 50 and shading device 8 ', placed on the base flange 52, so that the rim 83' rests on the base flange 52.
- the diameter of the annular portion 82 'and the support member 50 are coordinated so that the support member 50 and the shading device 8' along its ring axes are displaced.
- the aforementioned assembly is aligned on the base flange 52 and then the ring portion 82 'with the support member 50 and the rim 83' with the base flange 52 are welded together in the adjusted position.
- FIG. 6 shows a section of a third embodiment of the lamp according to the invention is shown in section.
- This third embodiment is almost identical to the first embodiment shown in FIG. It differs from the first exemplary embodiment only in that the adjusting sleeve 51 and the second annular portion 82 of the shading device 8 according to the third embodiment are arranged non-overlapping and in the ring portion 82 no openings 80 are present. Both the adjusting sleeve 51 and the second annular section 82 of the shading device 8 are welded to the mounting part 50 according to the third embodiment of the invention.
- the first and third embodiments are the same. The invention is not limited to the embodiments explained in more detail above.
- the invention can also be applied to incandescent lamps for taillights, brake lights or flashing lights, whose lamp vessel is provided with a selectively transparent interference filter coating to produce red or orange-colored light.
- the shading device in this case has the function of shading light leaving the lamp vessel in the area near the support part where the filtering effect is insufficient due to the large angles of incidence of light or where no filter coating is present.
- the invention is also applicable to discharge lamps as well as lamps with other lamp vessel geometries, for example with a spherical or a cylindrical lamp vessel.
- the invention can also be applied to lamps without filter coating on the lamp vessel, for example, to limit the light emission angle of the lamps.
- the lamp base or parts of the lamp cap or the shading device may also consist of a heat-resistant plastic.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005011935A DE102005011935A1 (en) | 2005-03-14 | 2005-03-14 | Lamp with shutdown device |
PCT/DE2006/000225 WO2006097060A1 (en) | 2005-03-14 | 2006-02-09 | Lamp with screening device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1859473A1 true EP1859473A1 (en) | 2007-11-28 |
EP1859473B1 EP1859473B1 (en) | 2013-06-05 |
Family
ID=36384536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06705945.1A Expired - Fee Related EP1859473B1 (en) | 2005-03-14 | 2006-02-09 | Lamp with screening device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1859473B1 (en) |
JP (1) | JP4814305B2 (en) |
CN (1) | CN101142653B (en) |
DE (1) | DE102005011935A1 (en) |
WO (1) | WO2006097060A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013054225A1 (en) * | 2011-10-10 | 2013-04-18 | Koninklijke Philips Electronics N.V. | Luminaire arrangement |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5745102U (en) * | 1980-08-28 | 1982-03-12 | ||
DE3921726A1 (en) * | 1989-07-01 | 1991-01-10 | Philips Patentverwaltung | ELECTRIC BULB |
DE9321215U1 (en) * | 1993-12-22 | 1996-09-12 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München | Halogen light bulb |
JP3047209B2 (en) * | 1995-03-16 | 2000-05-29 | 株式会社小糸製作所 | Filament support structure for light bulb and method for fixing filament to support |
JPH08306342A (en) * | 1995-05-01 | 1996-11-22 | Koito Mfg Co Ltd | Incandescent electric lamp |
DE19707245A1 (en) * | 1997-02-25 | 1998-08-27 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Method of making an electric light bulb |
JP4302779B2 (en) * | 1997-04-28 | 2009-07-29 | オスラム シルバニア インコーポレイテッド | Automotive lamp with improved filament and filament support |
JP2003059461A (en) * | 2001-08-10 | 2003-02-28 | Stanley Electric Co Ltd | Infrared light projecting electric lamp and vehicular sighting fixture having the electric lamp |
-
2005
- 2005-03-14 DE DE102005011935A patent/DE102005011935A1/en not_active Withdrawn
-
2006
- 2006-02-09 WO PCT/DE2006/000225 patent/WO2006097060A1/en not_active Application Discontinuation
- 2006-02-09 JP JP2008501146A patent/JP4814305B2/en not_active Expired - Fee Related
- 2006-02-09 CN CN2006800082289A patent/CN101142653B/en not_active Expired - Fee Related
- 2006-02-09 EP EP06705945.1A patent/EP1859473B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006097060A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102005011935A1 (en) | 2006-09-21 |
CN101142653A (en) | 2008-03-12 |
WO2006097060A1 (en) | 2006-09-21 |
JP2008533673A (en) | 2008-08-21 |
EP1859473B1 (en) | 2013-06-05 |
CN101142653B (en) | 2010-05-26 |
JP4814305B2 (en) | 2011-11-16 |
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