EP2492582A1 - Lampe et réflecteur pour une lampe - Google Patents

Lampe et réflecteur pour une lampe Download PDF

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Publication number
EP2492582A1
EP2492582A1 EP11001642A EP11001642A EP2492582A1 EP 2492582 A1 EP2492582 A1 EP 2492582A1 EP 11001642 A EP11001642 A EP 11001642A EP 11001642 A EP11001642 A EP 11001642A EP 2492582 A1 EP2492582 A1 EP 2492582A1
Authority
EP
European Patent Office
Prior art keywords
reflector
light
light source
light guide
luminaire
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.)
Withdrawn
Application number
EP11001642A
Other languages
German (de)
English (en)
Inventor
Heinrich Johannes Gantenbrink
Heiko Römelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bega Gantenbrink Leuchten KG
Original Assignee
Bega Gantenbrink Leuchten KG
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 Bega Gantenbrink Leuchten KG filed Critical Bega Gantenbrink Leuchten KG
Priority to EP11001642A priority Critical patent/EP2492582A1/fr
Publication of EP2492582A1 publication Critical patent/EP2492582A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lamp and a reflector for a lamp according to the preamble of the independent claims.
  • Such luminaires comprise a light source, a reflector and a light guide arranged inside the reflector.
  • the reflector has a light source end and a reflector outlet end, wherein the light source is arranged at the light source end of the reflector.
  • the light guide has a light entry end, a light exit end and an intermediate light-conducting section. The light entry end of the light guide is arranged at the light source end of the reflector, where the light source is located.
  • the light guide extends from the light source such that the light exit end of the light guide comes to rest on a point between the light source end of the reflector and the reflector exit end.
  • Such a light is for example off US 2004/0228131 A1 known.
  • This pamphlet deals with the use of LEDs as a replacement for conventional bulbs in flashlights.
  • Conventional bulbs for use in a flashlight have a thread with which the bulb can be screwed into a socket or directly into the reflector of the flashlight.
  • a conventional incandescent bulb comprises a glass bulb, which extends from the thread of the bulb in the direction of the outlet opening of the reflector and surrounds the filament of Glühbirnchens. This filament, together with the pear-shaped glass bulb surrounding it, forms a more or less point-like light source which is outstandingly suitable for use in a parabolic or ellipsoid reflector.
  • Such reflectors are also used in flashlights.
  • an LED is not a punctiform light source, which radiates the emitted light more or less globally.
  • the emission characteristic of a modern LED is at best hemispherical, with most of the light emitted in one direction.
  • the US 2004/0228131 A1 suggested to direct the light of the arranged at the bottom of the reflector LED by means of an essay to the point in which is located in conventional incandescent filaments, and from there as uniformly as possible to radiate in all directions.
  • the attachment thus functions as a light guide and comprises a light-conducting section for guiding the light from the LED to the desired emission point from the LED, and a light exit end for uniformly emitting the light at this point.
  • the US 2004/0228131 A1 also proposes to simulate the LED and top unit of a conventional light bulb, and in particular to provide a thread and a glass bulb enclosing the LED and its attachment.
  • the desire to use LEDs in conjunction with known parabolic or ellipsoidal reflectors extends not only to cases in which a conventional light bulb of an existing lamp with a corresponding reflector to be replaced.
  • the radiation characteristic of known parabolic or Ellipsoidreflektoren is often desirable even in completely newly developed lights that use as a light source one or more LEDs or other bulbs whose radiated light must first be directed by a light guide to a certain point within the reflector to be radiated evenly from there.
  • the encompassing of the LED known from the prior art as well as its light-guiding attachment with a glass bulb brings various disadvantages.
  • the light-conducting attachment usually has to be encapsulated with the LED or at least adhesively bonded in order to ensure a secure fit.
  • Object of the present invention is therefore to improve a luminaire or a reflector of the aforementioned type on.
  • an elegant shapely appearance of the lamp or the reflector is to be achieved while also the sealing of the lamp and the manufacture and installation should be simplified.
  • the invention is intended to enable a simple replacement of the bulb without the light-conducting attachment also has to be replaced.
  • the lamp according to the invention or the reflector according to the invention should also be inexpensive to manufacture.
  • the housing of the lamp is, for example, embedded in a wall or a ceiling, the viewer is given an extremely appealing appearance of the luminaire, since only the reflector and the optical fiber designed in one piece with it are visible to the outside. Particularly when the light is switched off, the elegant appearance is not clouded by dark sealing elements or the glass bulb of a conventional illuminant or a replacement solution known from the prior art, which releases the view of underlying components. A seal between light-conducting attachment and reflector is eliminated, since the two components are integrally connected to each other.
  • the invention also offers the advantage that the light source, so the light source such as an LED, can be replaced without the same time the photoconductive attachment must be replaced with.
  • the integrally interconnected components reflector and light guide can also be made inexpensively in a simple manner.
  • An optimal emission characteristic of the lamp results when the reflector has a focal point, wherein the light exit end of the light guide is located in the focal point of the reflector.
  • the light which is guided, starting from the light source through the light guide into the focal point of the reflector, directed from there at optimal angles to the reflector.
  • focal point used in this application should not be understood to mean a focal point in the strict sense, as it exists only with rotationally symmetrical reflectors.
  • the term focal point thus also explicitly includes the focal line of an elongated two-dimensional reflector.
  • the reflector has a threaded portion at the light source end.
  • this threaded portion is a sleeve-shaped or hollow-cylindrical extension at the lower light source end of the reflector, on whose inner or outer surface a thread is formed.
  • a step-shaped shoulder is formed between the threaded portion and the adjoining part of the reflector.
  • the seal against the lamp housing is further simplified.
  • a seal can be introduced between the step-shaped shoulder and a housing flange.
  • reflector and optical fiber are made of pressed glass. This allows a very simple and inexpensive production of the existing reflector and optical fiber unit. In particular, this reflector and light guide can be produced in one operation.
  • the light exit end of the light guide is spherical.
  • a good uniform point or spherical radiation of the light at the light exit end of the light guide is achieved.
  • Uniform emission characteristics can be achieved with a particularly attractive appearance
  • a conical tip of the light guide ie a cone aligned in the direction of the beam path, and a conical depression at the head end of the light guide, the tip of the cone in this case pointing against the beam path direction.
  • the light exit end of the light guide is reflective coated. This is particularly appropriate if the Lichtausrittsende of the light guide is designed as a conical recess.
  • the light emitted by the light source is then first passed through the light guide to the light exit end and deflected at the reflective coated surface of the conical recess completely on the reflector.
  • the effect of total reflection can be used instead of the reflective layer.
  • the reflector is reflective coated.
  • the coatings consist of a vapor-deposited aluminum layer.
  • the reflective coating can be inexpensively and easily manufactured.
  • the reflector is a parabolic reflector. This allows the use of the erfidungshielen lamp as a spotlight.
  • the desired in particular ceiling lights radiation characteristic is best achieved when the reflector is designed as ellipsoidal reflector.
  • the light entry end of the light guide is formed dome-shaped.
  • the unit according to the invention consisting of reflector and optical waveguide can be placed optimally on an LED, the light emitted by the LED being suitably coupled into the optical waveguide.
  • the dome-shaped design of the light entry end is also suitable for other bulbs than LEDs.
  • the reflector ie the distance between the light source end and the reflector outlet end, at least twice as long as the light guide, so the distance between the light entry end and light exit end.
  • the FIG. 1 shows a section of a lamp 1 according to the invention.
  • the lamp 1 is designed as a ceiling light and shown for illustrative purposes upside down. It comprises a luminaire housing 10, a light source 4 and an attached unit consisting of reflector 2 and light guide 3.
  • the housing 10 is usually embedded depending on the installation situation in the ceiling.
  • the illustrated light source 4 is an LED, wherein the application of the lamp according to the invention is not limited to the use of LEDs. Other bulbs would be conceivable.
  • the reflector 2 of the reflector and optical fiber unit is designed as EIlipsoidreflektor.
  • the outer wall of the reflector is rotationally symmetrical about the optical axis 13.
  • the upper Reflektorausrittsende 6 marks the light exit opening, from which the light of the lamp is radiated into the room.
  • the lower end of the reflector 2 is continuously referred to in the application as the light source end 5, since the light source 4 is arranged at this lower end.
  • the lower light source end 5 of the reflector 2 coincides with the light entrance end 8 of the concentric within the reflector arranged light guide 3 together.
  • Reflector 2 and light guide 3 are made, so to speak, of one piece. A simple production of this unit consisting of the components reflector and light guide is achieved by means of pressed glass.
  • the light entry end 8 of the light guide 3 is formed dome-shaped in order to ensure optimum coupling of the light emitted by the light source 4 in the light guide 3.
  • a light-conducting portion 7 of the light guide 3 extends upward in the direction of the reflector exit end 6.
  • the light-conducting portion 7 is also rotationally symmetrical to the optical axis 13 and has an upwardly tapering slightly conical outer surface.
  • the outer surface of the photoconductive portion 7 may be made cylindrical or elliptical. In any case, should be achieved by the geometric design of the outer surface of the photoconductive portion 7 that the light coupled from the light source into the light guide light is optimally guided in the direction indicated by the reference numeral 9 light exit end of the light guide 3. It is therefore of advantage if a total reflection of the light emitted by the light source 4 takes place at the outer surface of the light-conducting section 7, which is also referred to as the lateral surface.
  • the light exit end 9 of the light guide 3 is formed as a conical recess and is located in the focal point of the reflector 2.
  • a reflective deposited aluminum layer is applied on the surface of the conical recess. This reflective layer ensures that the light guided upward from the light source 4 via the light-conducting section 7 is diverted more or less at the focal point of the reflector onto the reflector itself. With appropriate geometry can be dispensed with the reflective layer, if on the surface of the conical recess, a total reflection of the guided through the light guide light takes place.
  • the reflector itself is also provided with a reflective layer which, depending on the geometry, can be vapor-deposited either on the inside or the outside of the outer reflector wall. This layer is also a vapor-deposited aluminum layer.
  • a stepped shoulder 15 is formed at the lower light source end 5 of the reflector.
  • the step-shaped shoulder 15 connects the upper reflector part with a downwardly extending sleeve-shaped extension of the reflector, which is designed as a threaded portion 11.
  • the cylindrical outer surface of the hollow cylindrical threaded portion 11 has a thread with which the unit consisting of reflector 2 and light guide 3 can be screwed into a socket 14 of the lamp housing 10.
  • the step-shaped shoulder 15 of the reflector 2 comes to lie on the upper housing flange 16 of the lamp housing 10, wherein in the illustrated case, a sealing ring 12 is inserted between the step-shaped shoulder 15 and the housing flange 16.
  • This sealing ring 12 is not required in most applications, but it allows a watertight seal of the lamp housing 10 by screwing the reflector 2 and the light guide 3 existing unit.
  • the invention is not limited to ceiling lights but can also be used in other lights, especially for spotlights.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP11001642A 2011-02-28 2011-02-28 Lampe et réflecteur pour une lampe Withdrawn EP2492582A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11001642A EP2492582A1 (fr) 2011-02-28 2011-02-28 Lampe et réflecteur pour une lampe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11001642A EP2492582A1 (fr) 2011-02-28 2011-02-28 Lampe et réflecteur pour une lampe

Publications (1)

Publication Number Publication Date
EP2492582A1 true EP2492582A1 (fr) 2012-08-29

Family

ID=44259821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11001642A Withdrawn EP2492582A1 (fr) 2011-02-28 2011-02-28 Lampe et réflecteur pour une lampe

Country Status (1)

Country Link
EP (1) EP2492582A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2201574A1 (de) * 1972-01-13 1973-07-19 Siemens Ag Signalleuchte
US20040141323A1 (en) * 2002-10-28 2004-07-22 Jean-Pierre Aynie Indicator lamp comprising an optical device for recovering and distributing the light flux towards an annular reflector
US20040228131A1 (en) 2003-05-13 2004-11-18 Light Prescriptions Innovators, Llc, A Delaware Limited Liability Company Optical device for LED-based light-bulb substitute
WO2006060392A2 (fr) * 2004-11-30 2006-06-08 Magna International Inc. Optique hybride pour lampe a diodes electroluminescentes
EP1805455B1 (fr) * 2004-10-18 2010-02-17 Koninklijke Philips Electronics N.V. Ensemble source lumineuse del haute efficacite
WO2010110652A1 (fr) 2009-03-23 2010-09-30 Eldolab Holding B.V. Lampe à del comprenant un guide de lumière comportant des première et seconde surfaces diffusantes
WO2011010535A1 (fr) * 2009-07-22 2011-01-27 帝人株式会社 Dispositif d’éclairage à led

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2201574A1 (de) * 1972-01-13 1973-07-19 Siemens Ag Signalleuchte
US20040141323A1 (en) * 2002-10-28 2004-07-22 Jean-Pierre Aynie Indicator lamp comprising an optical device for recovering and distributing the light flux towards an annular reflector
US20040228131A1 (en) 2003-05-13 2004-11-18 Light Prescriptions Innovators, Llc, A Delaware Limited Liability Company Optical device for LED-based light-bulb substitute
EP1805455B1 (fr) * 2004-10-18 2010-02-17 Koninklijke Philips Electronics N.V. Ensemble source lumineuse del haute efficacite
WO2006060392A2 (fr) * 2004-11-30 2006-06-08 Magna International Inc. Optique hybride pour lampe a diodes electroluminescentes
WO2010110652A1 (fr) 2009-03-23 2010-09-30 Eldolab Holding B.V. Lampe à del comprenant un guide de lumière comportant des première et seconde surfaces diffusantes
WO2011010535A1 (fr) * 2009-07-22 2011-01-27 帝人株式会社 Dispositif d’éclairage à led

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