WO2009077008A1 - Elektrische reflektorlampe mit zwei im wesentlichen parallelen leuchtkörper-abschnitten - Google Patents
Elektrische reflektorlampe mit zwei im wesentlichen parallelen leuchtkörper-abschnitten Download PDFInfo
- Publication number
- WO2009077008A1 WO2009077008A1 PCT/EP2007/064138 EP2007064138W WO2009077008A1 WO 2009077008 A1 WO2009077008 A1 WO 2009077008A1 EP 2007064138 W EP2007064138 W EP 2007064138W WO 2009077008 A1 WO2009077008 A1 WO 2009077008A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reflector
- lamp
- light source
- burner
- central part
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/14—Incandescent bodies characterised by the shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/34—Double wall vessels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the invention is based on an electric reflector incandescent lamp with two substantially parallel filament sections. These are in particular halogen bulbs.
- US-A 5,146,134 describes a halogen incandescent lamp having at least two substantially parallel filament sections.
- US Pat. Nos. 6,690,102, 5,726,525 and 5,757,113 all describe a reflector lamp based on two substantially parallel filament sections.
- the associated reflector is characterized by a radial symmetry.
- the reflector is composed of two sections or of individual facets.
- the diffuser which terminates the reflector, provided with a special scattering optics.
- measures are taken to take into account the imperfect radial symmetry of the luminous element, but these can only incompletely conceal this fundamental deficiency.
- halogen incandescent lamps for mains voltage often have an incandescent filament with two parallel luminous bodies, which when operating in a narrow-beam spot reflector, usually a PAR reflector, to a leads very uneven illumination of the illuminated area.
- a more uniform illumination has hitherto only been possible by using scattering structures in the reflector or in the cover, which reduces the bundling of the light radiation and the efficiency.
- US Pat. No. 5,119,282 describes a reflector for mains voltage halogen lamps which has contour lines in the form of confocal ellipses of low eccentricity, which are arranged in the plane of their small semiaxis in a parabolic contour.
- the two filaments of the halogen lamp run through the two focal points of the ellipses.
- This reflector thus corresponds to a parabolic reflector in a sectional plane and has a contour curved only slightly less than a parabola in a section plane perpendicular to the plane. It thus differs only slightly from an exactly parabolic reflector and therefore has essentially the same properties.
- the object of the present invention is to provide a reflector lamp on the basis of two substantially parallel filament sections, which allows a uniform as possible radiation.
- the reflector lamp is constructed from a burner and a reflector surrounding it.
- the burner is an incandescent lamp, advantageously a halogen incandescent lamp similar to that described in DS-A 5,146,134.
- This has at least two substantially parallel filament sections. These may in turn consist of several sections and they may in particular be slightly inclined to the axis of the burner. It is essential that they are not the usual radial-symmetrical lamps in which the luminous element is arranged axially. In the case of deviations from the radial symmetry of the luminous element, the person skilled in the art has assumed that this deviation can be treated as such a small disturbance that nevertheless a radially symmetrical reflector, which is modified accordingly, can be used.
- FIG. 1 shows a typical distribution of the luminous intensity for a surface illuminated at a distance of 2 m according to the prior art.
- the two arranged in a lateral distance from the focus luminaire sections cause that under no beam angle, the entire Refiektorflache can be illuminated by the burner. Therefore, no axial maximum occurs, but one recognizes two very narrow and unevenly shaped distribution maxima with otherwise low light intensity.
- the distribution achieved with the arrangement described for a 100 W halogen incandescent lamp has two maxima of 8200 cd each at a half-value angle of 8.4 °, which leads to a very blotchy illumination with a low brightness impression. Because such a light distribution usually is not desirable, the light cone must be expanded with loss of light output by scattering structures in the reflector or on the Abdeck ⁇ cheibe, but this no tight bundling of the light radiation is more possible.
- a diffuser with pearl pattern reduces the maximum light intensity to 3700 cd at a half-value angle of 20 °.
- Another disadvantage of a parabolic reflector is that no meaningful widening of the emitted light cone is possible by changing the lamp position.
- a burner with an incandescent lamp wherein the luminous element consists of at least two substantially parallel filament sections, is assigned a reflector in which the contour consists of three sections: a central channel-shaped section, at each of its two lateral ends a semicircular partial shell is scheduled.
- the longitudinal axis of the central channel section lies in the plane of the connection between the two lamp body sections.
- the largest distance between the luminaire sections is defined as parameter a.
- the length of the channel-shaped section is defined as parameter d. Then the following relationship applies:
- the reflector behaves increasingly like an ordinary radially symmetric reflector.
- the length of the channel should correspond almost exactly to the distance between the legs of the filament. Only then is in each case a luminous body section approximately at the focal point of the laterally associated reflector half-shell. If the length of the channel is shorter, ie if one moves in the direction of a circular line, two separate maxima increasingly appear. If the length of the gutter is longer, there is an increasing "hole" in the light distribution. Particularly good results come with
- the radius r of the pitch circle defined by the channel-shaped section, seen in cross-section, is selected such that:
- the entire depth T of the reflector is basically arbitrary. So that there is no direct lateral radiation, the reflector should extend at least to the front edge of the luminous element. Usually, the depth of the reflector is at least so large that they Length of the lamp vessel without crushing corresponds, so that at the front still a cover can be put on.
- the size of the recess in the reflector for fixing the burner is as small as possible and at least chosen so that the
- Burner or a separate lamp in the reflector can be introduced.
- a minimum value for the diameter 02 is 15mm. The concrete value depends on the
- the burner is held by a metal disk, for example, then it is a
- the reflector according to the invention is suitable for a light source with two light sources Ll and L2, be it two luminous bodies or two luminous body sections, which are located at a lateral distance d from one another.
- the two bulbs L1 and L2 can be e.g. Part of the U-shaped incandescent filament of a halogen incandescent lamp for Netsschreib. However, they can also be part of the U-shaped discharge vessel of, for example, a compact fluorescent lamp or a xenon flash lamp. General is therefore spoken of two bulbs sections.
- the light exit opening of the reflector is an opening area Ol with a largest dimension AB, which is preferably selected according to known standards.
- a reflector lamp of the type PAR 38 thus results, for example, a maximum value of 123.5 mm for the dimension AB.
- the total area of oil results from two semicircles H1 and H2 with a radius r, which are at a distance d from each other and via a central channel part, which is realized by two segments Sl and S2 are connected to each other.
- Typical values for the distance d are in the range of 5 to 20 mm.
- the outline of oil is the starting point of a reflector contour whose apex is below the light sources L 1 and L 2, but which terminates at the preferably circular opening O 2. This results in two mutually mirror-symmetrical reflector half-shells Pl and P2 with a short connector V.
- the contour of the reflector half-shells Pl and P2, seen in cross section, is preferably exactly or approximately parabolic in order to optimize the high concentration of the light radiation that can be achieved with the invention.
- a pitch circle is possible.
- the contour of the reflector half-shells P 1 and P 2 can also be curved significantly more strongly than a parabola, in particular following a higher power function than a simple parabola, in order to achieve a higher scattering of the light radiation. Due to the geometry of the arrangement, a better superimposition of the light coming from L1 and L2 is achieved in this case than in conventional solutions.
- a similar high concentration and uniformity of the illumination can be achieved for a light source with two luminous bodies as by a rotationally symmetrical reflector with an axially arranged, individual luminous body.
- the width of the radiation can be influenced, without resulting in a, for parabolic reflectors typical, dark zone in the middle of the illuminated area.
- the solution according to the invention is suitable for all types of headlamps and R ⁇ flektorlampen where a light source is used with two parallel luminaries.
- a preferred application are halogen reflector lamps for series voltage PAR 16, 20, 30, 38, 56 and 64. Further conceivable applications are e.g. Reflectors or reflector lamps for compact fluorescent lamps or U-shaped xenon flash lamps.
- Figure 1 is a reflector lamp as a schematic diagram
- FIG. 2 shows the reflector from FIG. 1 in detail
- Figure 3 shows an alternative embodiment of the reflector
- Figure 4-6 shows the illumination of a wall for different reflectors.
- the power supply lines 5 tern a luminous element 6, which essentially has two luminous luminous body sections which run almost axially parallel to the longitudinal axis LA.
- the burner 2 is seated in the neck 7 of a reflector 8.
- the reflector has a reflective contour 9, a neck attached to the socket 10 and a cover 11, which closes the opening of the reflector.
- FIG. 2a shows a top view from above.
- the reflector 8 consists of three parts. It has a central channel-shaped middle part 15 with two opposite segments 16. It has the length d. This is adjoined externally by two end parts 17, which adjoin the central part 15 in a semicircular manner.
- the radius r of the end part corresponds to half the diameter of the channel section 15.
- the distance between the two sections 6 of the luminous body, which sit axially in the reflector, is a.
- the neck area is symbolized by 02.
- the two luminous element sections are designated by L1 and L2.
- the common axis AA of the channel reflector 15 and the filament sections 6 is designated AA.
- a d.
- the entire axial length of the reflector is AL ; the entire transverse length of the reflector transverse to the axial length is AT.
- FIG. 2b shows in longitudinal section the contour P1 and P2 of FIG
- the reflector according to FIG. 2 is suitable for a light source with two luminous bodies or luminous element sections 6 or luminous means L 1 and L 2 which are at a mean lateral distance a from one another.
- the bulbs L1 and L2 may be e.g. Part of the U-shaped incandescent filament of a halogen incandescent lamp for mains voltage of 240 V. However, they can also be part of the U-shaped discharge vessel of, for example, a fluorescent lamp or a xenon flash lamp as a light source.
- the light exit is an opening area Ol having a largest dimension, which is preferably selected according to known standards such as IEC 60630.
- the outline of oil basically consists of two halves Hl and H2, each with a radius r, which are at a distance d from one another and are connected to one another via two, for example, straight segments S1 and S2 of the middle part.
- a typical value for the distance d is in the range of 5-20 mm.
- the outline of oil is the starting point of a reflector contour whose vertex is located below the luminous body sections Ll and L2, but which ends at the preferably circular opening 02 of the neck. This results in two mirror-symmetrical reflections half shells Pl and P2 with a short connecting piece 15.
- the contour of the reflector half-shells Pl and P2 is preferably exactly or approximately parabolic in order to realize the achievable with the invention high bundling of the light radiation.
- the contour of the reflector half-shells Pl and P2 can also be significantly more curved than a parabola in order to achieve a higher scattering of the light radiation. Due to the geometry of the arrangement, a better superimposition of the light coming from L1 and L2 is achieved in this case than in conventional solutions.
- FIG. 2b shows the position of the burner 2 for maximum bundling. It is chosen so that the geometric centers of the lamps Ll and L2 are in the focal points Fl and F2, which represent the focal points in the case of an exactly parabolic contour.
- the geometric centers of the luminous elements L1 and L2 are located at the points D1 and D2, as shown in alternative form in FIG. 2a, which lie in a position rotated radially by 90 ° relative to the points L1 and L2.
- the reflector is preferably made of glass or heat-resistant plastic and is provided on its inside with a highly reflective metal or interference layer.
- the reflector can also be made entirely of metal, preferably of aluminum sheet.
- the inside of the reflector can in principle be smooth and structureless. Preferably, it may also be faceted or above. This additional measure, which is known per se, does not matter here.
- the reflector may, in particular, have a structure extending between the outer opening 11 and the inner opening of the neck 7, wherein, for example, planar or curved segments into the interior of the reflector are used as a structure in the circumferential direction.
- FIG. 3 shows a subdivision into forty segments 40, which is created by rotation of a contour L lying in the plane of symmetry about the geometric center M of the arrangement.
- FIGS. 4 to 6 show the illumination achieved with various reflectors.
- the variability given by the possibility of arranging the burner in positions F1-F2 and D1-D2 can be used for a factory default setting of the burner. But it can also be used for a "zoom", wherein the user can rotate the reflector or the burner so that the burner comes optionally in position F1-F2 or D1-D2. If necessary, the usable adjustment range can be extended by superimposing an axial translation on the relative rotation in a known manner. As a result, the burner can be additionally defocused.
- a segmentation of the reflector, as shown in FIG. 3, serves to further even out the light emission in the circumferential direction.
- the solution described can be for a light source with two lights a similar high bundling and Uniformity of the illumination can be achieved as by a rotationally symmetrical reflector with an axially arranged single luminous body.
- the width of the radiation can be influenced by a relative rotation of the light source and the reflector, without resulting in a, for parabolic reflectors so far typical, dark zone in the middle of the illuminated area.
- the solution according to the invention is suitable for all types of headlamps and reflector lamps, in which a light source with at least two nearly parallel luminous bodies is used.
- a preferred application is mains voltage halogen reflector lamps, particularly those of the series PAR 16, 20, 30, 38, 56 and 64. Further applications are e.g. Reflectors for compact fluorescent lamps or reflector lamps based on compact fluorescent lamps, as known in principle from US Pat. No. 4,598,344, or based on U-shaped xenon flash lamps, as known in principle from DE-A 32 29 117.
- FIG. 4 shows, by way of example, the illumination of a wall located at a distance of 2 m, as has hitherto been achieved with a halogen incandescent lamp 240V 100W arranged as a burner in the focus of a high-gloss parabolic reflector PAR 38 with an open light exit.
- the halogen bulb has two filament sections.
- the two arranged in a lateral distance from the single focus lamp body sections cause that under no beam angle, the entire reflector surface can be illuminated by the burner. Therefore, no axial maximum occurs, but you can see two very narrow and unevenly shaped te distribution maxima with otherwise low light intensity.
- the distribution achieved with the arrangement described has two maxima of 8200 cd each at a half-value angle of 8.4 °, which leads to a very blotchy illumination with a low brightness indigo. Since such a light distribution is usually not desirable, the light cone must be subsequently expanded with loss of light - yield by scattering structures in the reflector or on the cover, whereby no tight bundling of the light radiation is possible.
- a diffuser with pearl pattern reduces, for example, the maximum light intensity to 3700 cd at a half-value angle of 20 °.
- FIG. 5 shows the illumination achieved with a reflector according to the invention under the same conditions as in FIG. 4 when using the same burner.
- FIG. 5 is kept to the same scale as FIG. 4, so that the improved bundling becomes clear.
- the burner is hereby arranged in a position L1-L2 (see FIG. 2).
- the photometric survey showed a maximum luminous intensity of 9200 cd at 7.2 ° half-beam angle.
- the light distribution produced is very even, even without a diffusing screen, despite a structureless, high-gloss reflector.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/064138 WO2009077008A1 (de) | 2007-12-18 | 2007-12-18 | Elektrische reflektorlampe mit zwei im wesentlichen parallelen leuchtkörper-abschnitten |
DE112007003688T DE112007003688A5 (de) | 2007-12-18 | 2007-12-18 | Elektrische Reflektorlampe mit zwei im wesentlichen parallelen Leuchtkörper-Abschnitten |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/064138 WO2009077008A1 (de) | 2007-12-18 | 2007-12-18 | Elektrische reflektorlampe mit zwei im wesentlichen parallelen leuchtkörper-abschnitten |
Publications (1)
Publication Number | Publication Date |
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WO2009077008A1 true WO2009077008A1 (de) | 2009-06-25 |
Family
ID=39892358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/064138 WO2009077008A1 (de) | 2007-12-18 | 2007-12-18 | Elektrische reflektorlampe mit zwei im wesentlichen parallelen leuchtkörper-abschnitten |
Country Status (2)
Country | Link |
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DE (1) | DE112007003688A5 (de) |
WO (1) | WO2009077008A1 (de) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4428038A (en) * | 1980-07-22 | 1984-01-24 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Distributed light reflector |
DE3229117A1 (de) | 1982-04-27 | 1984-02-16 | Albert Dipl.-Phys. 8000 München Kreitmair | Bestrahlungsgeraet fuer zahnersatzteile |
DE3428062A1 (de) * | 1984-07-30 | 1986-01-30 | Stanley Electric Co. Ltd., Tokio/Tokyo | Fahrzeugscheinwerfer |
DE4020080A1 (de) * | 1990-06-23 | 1992-01-02 | Bosch Gmbh Robert | Scheinwerfer fuer kraftfahrzeuge |
US5119282A (en) | 1989-08-01 | 1992-06-02 | Gte Products Corporation | Reflector lamp assembly utilizing lens that snaps into reflector |
US5146134A (en) | 1990-03-15 | 1992-09-08 | Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture |
US5363295A (en) * | 1992-10-22 | 1994-11-08 | Progressive Technology In Lighting, Inc. | Compact fluorescent lamp reflector |
US5726525A (en) | 1995-04-03 | 1998-03-10 | U.S. Philips Corporation | Electric reflector lamp |
US5757113A (en) | 1994-04-19 | 1998-05-26 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh | Medium/high voltage incandescent lamp and reflector combination |
US6525452B1 (en) * | 1999-06-15 | 2003-02-25 | Koninklijke Philips Electronics N.V. | Lamp with filament segments in curved layers |
US6690102B2 (en) | 2001-02-21 | 2004-02-10 | Koninklijke Philips Electronics N.V. | Electric lamp |
EP1441384A2 (de) * | 2003-01-24 | 2004-07-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Reflektor und Reflektorlampe |
-
2007
- 2007-12-18 DE DE112007003688T patent/DE112007003688A5/de not_active Withdrawn
- 2007-12-18 WO PCT/EP2007/064138 patent/WO2009077008A1/de active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4428038A (en) * | 1980-07-22 | 1984-01-24 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Distributed light reflector |
DE3229117A1 (de) | 1982-04-27 | 1984-02-16 | Albert Dipl.-Phys. 8000 München Kreitmair | Bestrahlungsgeraet fuer zahnersatzteile |
DE3428062A1 (de) * | 1984-07-30 | 1986-01-30 | Stanley Electric Co. Ltd., Tokio/Tokyo | Fahrzeugscheinwerfer |
US5119282A (en) | 1989-08-01 | 1992-06-02 | Gte Products Corporation | Reflector lamp assembly utilizing lens that snaps into reflector |
US5146134A (en) | 1990-03-15 | 1992-09-08 | Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture |
DE4020080A1 (de) * | 1990-06-23 | 1992-01-02 | Bosch Gmbh Robert | Scheinwerfer fuer kraftfahrzeuge |
US5363295A (en) * | 1992-10-22 | 1994-11-08 | Progressive Technology In Lighting, Inc. | Compact fluorescent lamp reflector |
US5757113A (en) | 1994-04-19 | 1998-05-26 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh | Medium/high voltage incandescent lamp and reflector combination |
US5726525A (en) | 1995-04-03 | 1998-03-10 | U.S. Philips Corporation | Electric reflector lamp |
US6525452B1 (en) * | 1999-06-15 | 2003-02-25 | Koninklijke Philips Electronics N.V. | Lamp with filament segments in curved layers |
US6690102B2 (en) | 2001-02-21 | 2004-02-10 | Koninklijke Philips Electronics N.V. | Electric lamp |
EP1441384A2 (de) * | 2003-01-24 | 2004-07-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Reflektor und Reflektorlampe |
Also Published As
Publication number | Publication date |
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DE112007003688A5 (de) | 2010-11-11 |
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