EP2297515B1 - Cadre de fixation comportant au moins un élément optique - Google Patents

Cadre de fixation comportant au moins un élément optique Download PDF

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Publication number
EP2297515B1
EP2297515B1 EP09780522.0A EP09780522A EP2297515B1 EP 2297515 B1 EP2297515 B1 EP 2297515B1 EP 09780522 A EP09780522 A EP 09780522A EP 2297515 B1 EP2297515 B1 EP 2297515B1
Authority
EP
European Patent Office
Prior art keywords
optical element
retaining frame
light
support frame
region
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.)
Not-in-force
Application number
EP09780522.0A
Other languages
German (de)
English (en)
Other versions
EP2297515A1 (fr
Inventor
Peter Frey
Thomas Reiners
Ralf Vollmer
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2297515A1 publication Critical patent/EP2297515A1/fr
Application granted granted Critical
Publication of EP2297515B1 publication Critical patent/EP2297515B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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 mounting frame with at least one optical element attached thereto, a method for mounting an optical element to a mounting frame and a lighting device, in particular a vehicle headlamp module, with a mounting frame.
  • US 2005/0128762 A1 describes a lighting device comprising a lens carrier and a glass lens configured to be located in front of a light source, wherein the lens (a refractive imaging optical element) is assembled with the lens carrier attached to the light source
  • Carrier is made of a plastic material, wherein the lens has a back, which is adapted to point in the direction of the light source, and an optical front and a peripheral edge, which connects the back and the front with each other, wherein the lens carrier at the edge in Engages the lens, wherein the lamp is characterized in that the carrier is attached to the lens by means of extrusion coating, wherein the material of which the carrier consists, at least partially surrounds the edge of the lens.
  • the EP 0 961 074 A2 discloses a lighting device for vehicles with a frame-like cover member and a cover integrally made therewith by injection molding of plastic.
  • the EP 0 892 209 A2 discloses a lens for a vehicle headlamp with a plastic injection molding method fixed thereto seal.
  • the support frame is equipped with at least one attached thereto by means of an injection molding optical element, wherein the at least one optical element for beam shaping is formed at least by means of total internal reflection and / or diffraction.
  • An optical element with at least total internal reflection and / or diffraction is understood to mean an optical element whose beam guidance is based on total internal reflection and / or diffraction, but can additionally also be based on refraction.
  • the at least one optical element has a CPC-like region, a CEC-like region and / or a CHC-like region.
  • a CPC-type concentrator may be used, by which is meant a concentrator whose reflective sidewalls have at least partially and / or at least largely the shape of a compound parabolic concentrator (CPC).
  • CPC compound parabolic concentrator
  • a compound elliptic concentrator (CEC) and / or a composite hyperbolic concentrator (CHC) may be employed.
  • a concentrator may, especially when used as a primary optic in a vehicle headlamp module, preferably serve to throw light from a light source to a secondary optics while adjusting a light distribution pattern, e.g. B. to create a light / dark boundary.
  • the optical element has a truncated pyramid-like region or a frustoconical region.
  • the optical element preferably has at least two projections for mechanically good-natured attachment to the mounting frame, in particular laterally arranged projections. Preferably, the provision of exactly two projections at opposite positions. It is particularly preferred for reducing transmission of mechanical and / or thermal stresses when the protrusions are arranged on only a minor part of a circumference of the optical element
  • the projections are held by means of a marginal, in particular narrow, overhang on the support frame.
  • a support frame which consists of a plastic, in particular a thermoplastic material, especially PPS ("polyphenylene sulfide”, also called “poly (thio-p-phenylene)”), especially linear PPS.
  • PPS polyphenylene sulfide
  • poly (thio-p-phenylene) especially linear PPS.
  • the good mechanical properties of PPS are maintained even at temperatures well above 200 ° C, so that a continuous use, depending on the load up to 240 ° C is possible. For a short time, loads at temperatures of up to 270 ° C are withstood. Also outstanding is the chemical resistance to almost all solvents, many acids and alkalis as well as to atmospheric oxygen even at high temperatures. In addition to low water absorption, PPS also has good dimensional stability and inherent flame retardancy.
  • Linear PPS has excellent electrical insulating properties, is highly impermeable to most liquids and gases, has low creep even at higher temperatures and, due to its good flow, is also suitable for long, narrow moldings and complex tool geometries.
  • Linear PPS can, unlike cross-linked PPS, they are formed into components through a wide range of processing techniques.
  • a support frame is preferred in which an inner side of the wall, which is intended to be directed towards the optical element, having a light-absorbing surface structure.
  • the wall may, for example, be roughened and / or coated with a light-absorbing layer.
  • a support frame having a closed circumferential wall for laterally surrounding the optical element.
  • the method for producing a system of support frame and an optical element attached thereto comprises at least the step of injection molding the support frame, wherein the optical element is potted only at a plurality of mounting protrusions with the support frame, in particular by means of a marginal overhang.
  • the support element can then be connected directly or via further means, such as circuit carrier, heat sink or substrate plates, with the light source.
  • the lighting device is equipped with such a mounting frame and has at least one semiconductor light source, in particular light-emitting diode, on which the optical element is connected downstream, in particular as primary optics.
  • the optical element may be made of glass or transparent plastic, preferably silicone.
  • FIG. 1 shows an optical system 1 with a support frame 2 and to be attached to the frame optical element 3 in an exploded view.
  • the optical system 1 is typically connected downstream of one or more light sources and serves for beam guidance of at least part of the light emitted by the light source or the light sources.
  • the optical system 1 can be used for example as part of an automotive lamp, z. B. a headlight.
  • the support frame 2 has a hollow, upper side and lower side open base body 4, which is formed by means of a closed circumferential, thick wall 5 with a substantially oval passage contour.
  • the thus formed inner cavity 6 of the base body 4 serves to receive the optical element 3.
  • the base body 4 at its upper edge 7 has two receiving areas in the form of opposing recesses 8.
  • In a lower region of the main body 4 are four laterally protruding tabs 9, 10 for attachment of the support frame 2 at one, not shown here, light available.
  • two obliquely opposite tabs 9 perpendicular guide pins 11, whose lower part is used for positioning of the support frame 2 and whose upper part is used for positioning a secondary optics.
  • the other two tabs 10 have through holes 12 for the implementation of fastening screws.
  • the support frame 2 is made of linear PPS.
  • the PPS is blackened to minimize light reflection on the support frame 2.
  • unwanted scattered light which impinges on the support frame 2 can be suppressed.
  • the inner side 13 of the main body 4 or its wall 5 is roughened.
  • a lateral leakage of stray light from the support frame 2 is also suppressed by the closed circumferential shape of the wall 5.
  • the optical element 3 is designed as a totally internal reflection (TIR) optic with an asymmetrically truncated pyramid base body 14 made of glass.
  • TIR totally internal reflection
  • Such a designed primary optic allows an efficient reduction of the divergence of light, which can be achieved in particular headlights with sufficient brightness and well-defined radiation characteristics.
  • the optical element 3 For attachment to the support frame 2, the optical element 3 has a corresponding attachment region with two lateral tab-shaped projections 15.
  • the projections 15 have essentially the attachment function and have only a negligible influence on the optical property of the optical element 3.
  • An advantage of the attachment only to the projections 15 is also that then a cut-off line is well defined.
  • the optical element 3 is thus fixed only by the projections 15 on the support frame 2, while the remaining surface free is.
  • protrusions 15 By virtue of the protrusions 15 occupying a circumferentially small portion of the optical element 3 (namely, being located only on the narrow sides of the upper edge), mechanical stress on the protrusions, which could be caused by assembly, has little effect on the protrusion remaining volume of the optical element 3, since distortions in the material can be at least partially degraded by the free surface.
  • This "load goodness" is the more pronounced the fewer projections 15 are used and the smaller the relative attachment area.
  • optical system 1 is produced by injection molding of the support frame 2, the support frame 2 and the optical element 3 are thus not intended to be separated.
  • FIG. 2 shows the optical system 1 with the support frame 2 and the optical element 3 connected together. This is done by injection molding the support frame 2 to the optical element 3. Since the TIR element 3 on the upper side with the upper edge 7 of the support frame 2 is substantially flush, sets a narrow, marginal camber 19 directly above the projection 15 of the optical TIR element 3 and holds the optical element 3 on the support frame. 2
  • the surface of the optical element 3 outside the protrusions 15 is not in contact with the support member 2.
  • the optical element 2 thus does not close the inner cavity 6.
  • FIG. 3 shows the lighting device with a system according to FIG. 2 in cross section.
  • This view shows that the optical element 3 (TIR concentrator) is not symmetrical.
  • the two side walls 20 are different obliquely, wherein nevertheless along them direct connecting lines between a lower light entrance surface 21 and an upper light exit surface 22 are substantially straight.
  • a non-widening extension region 24 adjoins, on which also the lateral tabs are arranged.
  • the bulges 19 hold the optical element 3 at the edge of the upper light exit surface 22.
  • the optical element 3 is laterally completely surrounded by the support frame 17 along its longitudinal extent (parallel to the z-axis). It can be seen from the cross-sectional illustration shown here on the narrower side of the optical element 3 that the optical element 2 fills less than a third of the inner cavity 6, but over almost its entire length (along the z-direction).
  • light from a light-emitting diode 25 is fed into the lower light entry surface 21 of the optical element 3, as is merely outlined here.
  • the light-emitting diode 25, which is constructed here from a plurality of mounted on a common submount white-emitting LED chips is arranged so close to the lower light entrance surface 21, that radiated by her light for the most part enters the lower light entrance surface 21 and only a small Part up the inside 13 of the wall 5 of the support frame 2 is blasted. No light from the LED 25 is transmitted directly through the free space between the optical element 3 and the wall 5.
  • the light-absorbing property of the inner side 13 absorbs incident light thereon. Thus, only the optical element 3 light is emitted to the outside (here: up).
  • TIR total internal reflection
  • thermoplastic plastic
  • This is preferably opaque.
  • the type of optical element is not limited. Instead of the TIR concentrator having a substantially truncated pyramidal structure, it is also possible, for example, to use a substantially frusto-conical basic shape.
  • diffractive optical elements such as a Fresnel zone plate or a diffraction grating, can also be held in the mounting frame.
  • the optical element may have a microstructured surface for beam shaping, e.g. B. a so-called cushion structure.
  • the number of attachment areas, in particular attachment projections, of the optical element is not limited. Thus, more than two attachment areas may be present, or only a single receiving area, for example in the form of a partially or completely circumferential edge.
  • the semiconductor light source comprises at least one light-emitting diode.
  • the light source can be present, for example, as an LED module with a light-emitting diode chip or a plurality of light-emitting diode chips, or as a single (s) housed (s) LED ('LED lamp'), which preferably emits white, z. B. a conversion LED. In the presence of several LEDs, these z. B. same color (monochrome or multi-colored) and / or different colors shine.
  • an LED module may have a plurality of single LED chips ('LED cluster'), which together result in a white mixed light, z. B. in 'cold white' or 'warm white'.
  • the LED cluster preferably comprises light-emitting diodes which shine in the primary colors red (R), green (G) and blue (B).
  • red (R), green (G) and blue (B) red-emitting diodes
  • single or multiple colors can also be generated by several LEDs simultaneously; Combinations RGB, RRGB, RGGB, RGBB, RGGBB etc. are possible.
  • the color combination is not limited to R, G and B, but may include, for example, white-emitting LED chips.
  • one or more amber LEDs 'amber' (A) may also be present to produce a warm white hue.
  • An LED module can also have several white single chips, resulting in a simple scalability of the luminous flux can achieve.
  • the individual chips and / or the modules can be equipped with suitable optics for beam guidance, z. B. Fresnel lenses, collimators, and so on. It can be arranged on a contact several identical or different types of LED modules, for. B. several similar LED modules on the same substrate.
  • z. B. based on InGaN or AlInGaP organic LEDs (OLEDs) are generally used.
  • z. B. diode lasers are used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (8)

  1. Cadre de support (2) comportant au moins un élément optique (3) fixé au cadre au moyen d'un procédé de moulage par injection,
    caractérisé en ce que le au moins un élément optique (3) est conçu pour la formation d'un faisceau au moins par réflexion totale intérieure et/ou diffraction et comprend au moins deux saillies (15) pour la fixation au cadre de support (2), et les au moins deux saillies (15) sont fixées au cadre de support (2) au moyen d'une surépaisseur marginale (19.
  2. Cadre de support (2) selon la revendication 1, dans lequel l'élément optique (3) comporte une zone de type concentrateur à forme libre, une zone de type CPC, une zone de type CEC et/ou une zone de type CHC.
  3. Cadre de support(2) selon la revendication 1 ou 2, dans lequel l'élément optique (3) comporte une zone en forme de pyramide tronquée ou une zone en forme de cône tronqué.
  4. Cadre de support(2) selon l'une des revendications précédentes, comprenant une paroi périphérique fermée (5) servant à entourer latéralement l'élément optique (3).
  5. Cadre de support(2) selon la revendication 4, dans lequel un côté intérieur (13) de la paroi (5), prévu pour être dirigé vers l'élément optique (3), présente une structure de surface qui absorbe la lumière.
  6. Cadre de support(2) selon l'une des revendications précédentes, lequel cadre est constitué d'une matière thermoplastique.
  7. Dispositif d'éclairage pourvu d'un cadre de support (2) selon l'une des revendications précédentes, comprenant au moins une source de lumière à semi-conducteur (25) suivie en aval par l'élément optique (3).
  8. Procédé de production d'un système composé d'un cadre de support (2) et d'un élément optique (3) fixé au cadre, caractérisé en ce que le procédé comprend au moins l'étape suivante :
    moulage par injection du cadre de support (2) de manière à mouler l'élément optique (3) dans le cadre de support (2) simplement au niveau de plusieurs saillies de fixation (15) au moyen d'une surépaisseur marginale (19).
EP09780522.0A 2008-07-16 2009-07-13 Cadre de fixation comportant au moins un élément optique Not-in-force EP2297515B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008033384A DE102008033384A1 (de) 2008-07-16 2008-07-16 Halterungsrahmen
PCT/EP2009/058933 WO2010007028A1 (fr) 2008-07-16 2009-07-13 Cadre de fixation comportant au moins un élément optique

Publications (2)

Publication Number Publication Date
EP2297515A1 EP2297515A1 (fr) 2011-03-23
EP2297515B1 true EP2297515B1 (fr) 2014-04-02

Family

ID=41217798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780522.0A Not-in-force EP2297515B1 (fr) 2008-07-16 2009-07-13 Cadre de fixation comportant au moins un élément optique

Country Status (6)

Country Link
US (1) US8552627B2 (fr)
EP (1) EP2297515B1 (fr)
JP (1) JP5290414B2 (fr)
CN (1) CN102099622B (fr)
DE (1) DE102008033384A1 (fr)
WO (1) WO2010007028A1 (fr)

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DE102010008596B4 (de) * 2010-02-19 2022-09-29 HELLA GmbH & Co. KGaA Anordnung eines Optikelements in einem Scheinwerfer
DE102012213844B4 (de) * 2012-08-03 2021-01-28 Automotive Lighting Reutlingen Gmbh Lichtmodul für KFZ-Scheinwerfer mit zwei Optikeinheiten und zugehörigen Befestigungseinrichtungen
DE102016206238A1 (de) * 2016-04-14 2017-10-19 Osram Gmbh Beleuchtungseinrichtung
CN106707725B (zh) * 2017-01-20 2022-07-22 中国电子科技集团公司第十二研究所 一种用于原子钟的光学透射窗
CN109340697B (zh) * 2018-10-28 2024-03-29 迅驰车业江苏有限公司 一种带有光幕效果的车灯用聚光器光学系统
CN110275271B (zh) * 2019-07-15 2021-09-14 北京遥感设备研究所 一种反射镜与转轴的连接结构
DE102020112342A1 (de) * 2020-05-07 2021-11-11 Bayerische Motoren Werke Aktiengesellschaft Zierelement, Fahrzeug mit einem derartigen Zierelement sowie Verfahren zur Herstellung eines Zierelements
CN214536006U (zh) * 2021-02-05 2021-10-29 华域视觉科技(上海)有限公司 车灯光学元件、车灯照明装置、车灯及车辆
JP7779706B2 (ja) * 2021-11-22 2025-12-03 スタンレー電気株式会社 半導体発光装置及び半導体発光モジュール

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EP0100379B1 (fr) * 1982-07-29 1986-10-08 Olympus Optical Co., Ltd. Lentille plastique
JP2952127B2 (ja) * 1992-11-19 1999-09-20 日本電設工業 株式会社 発光装置
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FR2843443B1 (fr) 2002-08-08 2004-11-26 Valeo Vision Procede de realisation d'un dispositif d'eclairage ou de signalisation, et dispositif d'eclairage ou de signalisation obtenu par ce procede
DE10314524A1 (de) 2003-03-31 2004-10-28 Osram Opto Semiconductors Gmbh Scheinwerfer und Scheinwerferelement
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DE102005033709B4 (de) 2005-03-16 2021-12-16 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Lichtemittierendes Modul

Also Published As

Publication number Publication date
US20110121708A1 (en) 2011-05-26
DE102008033384A1 (de) 2010-01-21
CN102099622A (zh) 2011-06-15
CN102099622B (zh) 2014-06-18
EP2297515A1 (fr) 2011-03-23
JP5290414B2 (ja) 2013-09-18
WO2010007028A1 (fr) 2010-01-21
JP2011528164A (ja) 2011-11-10
US8552627B2 (en) 2013-10-08

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