WO2023066441A1 - Lampe à réflecteur - Google Patents

Lampe à réflecteur Download PDF

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Publication number
WO2023066441A1
WO2023066441A1 PCT/EP2021/078783 EP2021078783W WO2023066441A1 WO 2023066441 A1 WO2023066441 A1 WO 2023066441A1 EP 2021078783 W EP2021078783 W EP 2021078783W WO 2023066441 A1 WO2023066441 A1 WO 2023066441A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflector
section
conical section
light
light source
Prior art date
Application number
PCT/EP2021/078783
Other languages
English (en)
Inventor
Adrian GOMUŁKA
Michał GRABIEC
Wojciech SYREK
Original Assignee
Merit Automotive Electronics Systems S.L.U.
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 Merit Automotive Electronics Systems S.L.U. filed Critical Merit Automotive Electronics Systems S.L.U.
Priority to PCT/EP2021/078783 priority Critical patent/WO2023066441A1/fr
Publication of WO2023066441A1 publication Critical patent/WO2023066441A1/fr

Links

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
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21V7/041—Optical design with conical or pyramidal surface
    • 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
    • F21V7/06—Optical design with parabolic curvature
    • 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 present invention relates to a reflector lamp comprising a light source and a reflector defined by a surface of revolution around an axis and having an outlet.
  • Reflector lamps of this kind are commonly used in various consumer devices, as well as in automotive industry. They may also have a form of LED lamps having a socket providing mechanical support and electrical connections.
  • Publication US6585397 discloses a reflector lamp comprising a light source lamp placed at the focal point of a reflector made up of a first parabolic reflector designed for reflecting light rays coming from the light source lamp to be outputted as light rays parallel to the optical axis, second parabolic reflector designed for reflecting light rays coming from the light source lamp as outwardly inclined parallel light rays, and circular truncated conic reflector for reflecting light rays coming from the second parabolic reflector and outputted as light rays parallel to the optical axis.
  • light rays that cannot be outputted due to being in the shadow of the spherical light source lamp can be outputted as light rays parallel to the optical axis.
  • Publication W02008009166 discloses a light-emitting diode illuminating device that comprises a light-modulated hood, a reflector hood, and a variable focus lens, which are located in front of the light-emitting diode.
  • the light emitted from the diode is firstly modulated by the light-modulated hood whose shape is any one of an oblique cone, a paraboloid and an ellipsoid, then reflected by the reflector hood whose shape is any one of a cylinder, a paraboloid and a cone, and finally projected outward through the lens.
  • Publication WO2015060450 discloses an illuminating instrument with a planar light source having a planar light emitting surface orthogonal to a center axis and a reflector that reflects light from the light emitting surface at a reflecting surface with the center axis as a reference.
  • the reflecting surface has a first reflecting surface that has a parabolic surface shape formed by rotation centered on the center axis of one part of a first parabolic line, which has the center axis as an axis of symmetry, and a second reflecting surface that has a parabolic surface shape formed by rotation centered on the center axis of one part of a second parabolic line, which has a center axis parallel to the center axis as an axis of symmetry.
  • Publication CN201215596 discloses a compound parabolic condenser for a solar optical fiber lighting system, which comprises a primary composite paraboloidal condenser composed of a section of two parallel parabolic segments crossing each other, with their foci separated by some section, which are rotated around the axis crossing the middle of and parallel to this section.
  • the condenser increases the concentration ratio of natural lights that it receives.
  • the invention provides a reflector lamp of the kind mentioned in the outset that is characterized in that the reflector has an inner conical section that widens into a parabolic section, wherein the light source is disposed substantially at the inlet and in the center of said inner conical section defining a virtual focal point of the reflector; said parabolic section is defined by generatrices having a circle of the focal points located outside of the reflector at the side of said inner conical section; said inner conical section is configured to reflect light rays towards said parabolic section; said parabolic section is configured to reflect light rays towards a light ring of the outlet having an inner diameter and an outer diameter corresponding to the outer diameter of the reflector; and said inner conical section reflects light with an intensity up to a predefined light intensity of said light source.
  • said parabolic section further widens into an outer conical section, wherein said inner conical section is configured to reflect light rays also towards said outer conical section; and said outer conical section is configured to reflect light rays towards said light ring of the outlet.
  • the inclination angle of said inner conical section is within the range of 1 to 10 degrees.
  • the inclination angle of said outer conical section is within the range of 1 to 10 degrees.
  • the radial offset between the virtual focal point of the reflector and said circle of the focal points of the parabolic section is 2 to 4 times bigger than the reflector outer diameter.
  • the axial offset between the virtual focal point of the reflector and said circle of the focal points of the parabolic section is 2 to 4 times bigger than the reflector outer diameter.
  • the axial offset between said circle of the focal points and the minimum of the generatrix of the parabolic section is 1 to 3 times bigger than the reflector height.
  • said inner conical section reflects light having intensity amounting up to 70% of the maximal light intensity of said light source.
  • said light source is a planar light source providing an oval radiation pattern.
  • said light source has a form of a light emitting diode.
  • Fig. 1 is a schematic axonometric view of an embodiment of a reflector lamp according to the present invention
  • Fig. 2 is a schematic cross-sectional view of the embodiment of the reflector lamp shown in Fig. 1 and a diagram of the reflector specular reflection;
  • Fig. 3 illustrates the geometry of a parabolic section of a reflector according to the present invention
  • Fig. 4 illustrates the geometry of a reflector according to the present invention
  • Fig. 5 illustrates a radiation pattern of a light source of the reflector lamp shown in Fig. 1.
  • Figs. 1-2 show an embodiment of a reflector lamp according to the present invention comprising a housing 2 and a light source 1 disposed within the housing 2.
  • the light source 1 has a form of a light emitting diode (LED) featuring an oval radiation pattern shown in Fig. 5.
  • LED light emitting diode
  • the housing 2 has an internal surface of revolution around an axis A defining a reflector 3 having an inner conical section 31 and a parabolic section 32.
  • the reflector 3 is also provided with an outer conical section 33.
  • the inner conical section 31 widens into the parabolic section 32 and the light source 1 is located at its inlet and in its center defining a virtual focal point 34 of the reflector 3.
  • the parabolic section 32 widens into an outer conical section 33 that widens into an outlet 35 of the reflector 3.
  • the outlet 35 refers to a surface delimiting the outer conical section 33, as the space within the reflector 3 is open.
  • the outlet 35 could be an element made of plastic, glass or any other appropriate transparent or translucent material.
  • the parabolic section 32 is defined by generatrices 322 having a circle 321 of the focal points 323 located outside of the reflector 3 at the side of the inner conical section 31.
  • Fig. 4 Detailed geometry of a reflector 3 according to the present invention is shown in Fig. 4.
  • the reflector has a height h that is divided into the heights h31-h33 of each section 31 -33.
  • the inner conical section 31 and the outer conical section 33 are inclined respectively by angles a and [3 with respect to the axis of revolution A.
  • the angles a and [3 are chosen within the ranges of 1 to 10° (degrees), in dependence of the radiation pattern of the employed light source 1 and the entire geometry of the reflector 3.
  • Each section 31 , 32, 33 has a certain critical angle, respectively y1 , Y2, y3-
  • the critical angle y1 of the inner conical section 31 is the angle below which rays emitted from the virtual focal point 34 of the reflector 3 are reflected towards the parabolic section 32 or the outer conical section 33.
  • Rays emitted by the light source 1 at angles within the range y1 to y2 are reflected by the parabolic section 32
  • rays emitted at angles within the range y2 to y3 are reflected by the outer conical section 33
  • rays emitted at angles within the range y3 to 90 degrees are emitted outside of the reflector 3.
  • Both the parabolic section 32 and the outer conical section 33 are configured to reflect light towards a light ring 351 of the outlet 35 (cf. Fig. 2).
  • the light ring 351 has an inner diameter D1 and an outer diameter corresponding to the outer diameter D of the reflector 3 that is the diameter of the outlet 35.
  • the radial width (D-D1) of the light ring 351 is adjusted to the radiation pattern of the light source 1 (cf. Fig. 5) and defined by the geometry of the inner conical section 31 , the parabolic section 32, and the outer conical section 33 (if present), and the reflection coefficient of the reflector 3.
  • An inner diameter d of the reflector 3 lies at the level of the virtual focal point 34.
  • the virtual focal point 34 is displaced with regard to the circle 321 of the focal points 323 by a radial offset r and axial offset a that, along with the angle y1 and the height 31 of the inner conical section 31 define a parabolic section parameter f, that is the axial offset of the focal point 323 with respect to the minimum of the generatrix 322 of the parabolic section 32.
  • Both radial r and axial offset a are selected to be 2 to 4 times bigger than the reflector outer diameter D in dependence of the radiation pattern of the employed light source 1 .
  • the parabolic section parameter f is selected to be 1 to 3 times bigger than the reflector height h.
  • the height h31 and the critical angle y1 of the inner conical section 31 are selected to enable the inner conical section 31 to gather low intensity rays.
  • the critical angle y1 amounts about 28 degrees to gather rays below about 62% intensity of the light source 1 .
  • these rays are reflected by the inner conical section 31 and directed towards the parabolic section 32 or the second conical section 33.
  • the critical angle y2 amounts about 43 degrees to gather rays between 62% and 83% intensity of the light source 1
  • the critical angle y3 amounts about 53 degrees to gather rays between 83% and 92%intensity. Higher intensities are emitted directly outside of the reflector 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne une lampe à réflecteur comprenant une source de lumière (1) et un réflecteur (3) défini par une surface de révolution autour d'un axe (A) et présentant une sortie (35). Afin d'obtenir une distribution uniforme de la lumière sans point chaud au centre de la source lumineuse (1), ainsi qu'une insensibilité à la tolérance à la position de la source lumineuse (1), le réflecteur (3) comporte une section conique interne (31) qui s'élargit en une section parabolique (32), la source lumineuse (1) étant disposée sensiblement à l'entrée et au centre de ladite section conique interne (31) définissant un point focal virtuel (34) du réflecteur (3) ; ladite section parabolique (32) étant définie par des génératrices (322) ayant un cercle (321) des points focaux (323) situés à l'extérieur du réflecteur (3) sur le côté de ladite section conique interne (31) ; ladite section conique interne (31) étant configurée pour réfléchir les rayons lumineux vers ladite section parabolique (32) ; ladite section parabolique (32) étant configurée pour réfléchir les rayons lumineux vers un anneau lumineux (351) de la sortie (35) ayant un diamètre intérieur (D1) et un diamètre extérieur correspondant au diamètre extérieur (D) du réflecteur (3) ; et ladite section conique intérieure (31) réfléchissant la lumière avec une intensité allant jusqu'à une intensité lumineuse prédéfinie de ladite source lumineuse (1).
PCT/EP2021/078783 2021-10-18 2021-10-18 Lampe à réflecteur WO2023066441A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/078783 WO2023066441A1 (fr) 2021-10-18 2021-10-18 Lampe à réflecteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/078783 WO2023066441A1 (fr) 2021-10-18 2021-10-18 Lampe à réflecteur

Publications (1)

Publication Number Publication Date
WO2023066441A1 true WO2023066441A1 (fr) 2023-04-27

Family

ID=78372004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/078783 WO2023066441A1 (fr) 2021-10-18 2021-10-18 Lampe à réflecteur

Country Status (1)

Country Link
WO (1) WO2023066441A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB448412A (en) 1934-09-03 1935-03-04 Henri Leroudier An improved projecting apparatus for light or heat rays or sound waves
US2274405A (en) * 1940-07-09 1942-02-24 Gen Electric Luminaire
DE3312200A1 (de) 1983-04-02 1984-10-04 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Leuchte zum grossflaechigen und gleichmaessigen ausleuchten von wohn- und arbeitsraeumen oder dergleichen
US6585397B1 (en) 2000-01-20 2003-07-01 Fujitsu General Limited Reflector for a projection light source
WO2008009166A1 (fr) 2006-07-03 2008-01-24 Wen-Sung Lee Dispositif d'éclairage à diode électroluminescente a éclairage fortement uniforme
CN201215596Y (zh) 2008-04-01 2009-04-01 郑宏飞 用于太阳能光纤照明系统的复合抛物面聚光器
CN101840067A (zh) 2010-06-01 2010-09-22 浙江工业大学 一种基于tracepro软件的非规范复合抛物面聚光器的建模方法
WO2015060450A1 (fr) 2013-10-27 2015-04-30 株式会社モデュレックス Instrument d'eclairage
WO2016108279A1 (fr) * 2014-12-28 2016-07-07 株式会社モデュレックス Appareil d'éclairage
CN104456422B (zh) * 2013-09-25 2018-10-12 海洋王（东莞）照明科技有限公司 气体放电灯具的反射器

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB448412A (en) 1934-09-03 1935-03-04 Henri Leroudier An improved projecting apparatus for light or heat rays or sound waves
US2274405A (en) * 1940-07-09 1942-02-24 Gen Electric Luminaire
DE3312200A1 (de) 1983-04-02 1984-10-04 Westfälische Metall Industrie KG Hueck & Co, 4780 Lippstadt Leuchte zum grossflaechigen und gleichmaessigen ausleuchten von wohn- und arbeitsraeumen oder dergleichen
US6585397B1 (en) 2000-01-20 2003-07-01 Fujitsu General Limited Reflector for a projection light source
WO2008009166A1 (fr) 2006-07-03 2008-01-24 Wen-Sung Lee Dispositif d'éclairage à diode électroluminescente a éclairage fortement uniforme
CN201215596Y (zh) 2008-04-01 2009-04-01 郑宏飞 用于太阳能光纤照明系统的复合抛物面聚光器
CN101840067A (zh) 2010-06-01 2010-09-22 浙江工业大学 一种基于tracepro软件的非规范复合抛物面聚光器的建模方法
CN104456422B (zh) * 2013-09-25 2018-10-12 海洋王（东莞）照明科技有限公司 气体放电灯具的反射器
WO2015060450A1 (fr) 2013-10-27 2015-04-30 株式会社モデュレックス Instrument d'eclairage
WO2016108279A1 (fr) * 2014-12-28 2016-07-07 株式会社モデュレックス Appareil d'éclairage

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