EP2297515A1 - Cadre de fixation comportant au moins un élément optique - Google Patents

Cadre de fixation comportant au moins un élément optique

Info

Publication number
EP2297515A1
EP2297515A1 EP09780522A EP09780522A EP2297515A1 EP 2297515 A1 EP2297515 A1 EP 2297515A1 EP 09780522 A EP09780522 A EP 09780522A EP 09780522 A EP09780522 A EP 09780522A EP 2297515 A1 EP2297515 A1 EP 2297515A1
Authority
EP
European Patent Office
Prior art keywords
optical element
support frame
light
projections
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.)
Granted
Application number
EP09780522A
Other languages
German (de)
English (en)
Other versions
EP2297515B1 (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

Links

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 an illumination device comprising a lens carrier and a glass lens designed to be arranged in front of a light source, wherein the lens (an optical refraction-imaging element) is assembled with the lens carrier which abuts the light source is mounted, wherein the support 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 wherein the lens carrier comes into engagement with the lens at the edge, the lamp being characterized in that the carrier is attached to the lens by means of injection molding, wherein the material constituting the carrier at least partially surrounds the edge of the lens ,
  • 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, which means a concentrator whose reflecting sidewalls have at least partially and / or at least substantially the shape of a compound parabolic concentrator (CPC).
  • CPC compound parabolic concentrator
  • a composite elliptic concentrator (CEC) and / or compound 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.
  • a light distribution pattern e.g. B. to create a light / dark boundary.
  • the optical element may also be preferred if it 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 smaller 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 “PoIy (thio-p-phenylene)”), especially linear PPS exists.
  • PPS polyphenylene sulfide
  • PoIy thio-p-phenylene
  • Linear PPS can, unlike networked! PPS, formed into components through a wide range of processing methods.
  • 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 mounting 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 fastening projections 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.
  • the invention will be described schematically with reference to an embodiment schematically. It can be provided with the same reference numerals for better clarity identical or equivalent elements.
  • FIG. 1 shows an exploded view in an oblique view from above of a frame according to an optical element with an optical element to be held therein separated therefrom;
  • FIG. 2 shows an oblique view from above of the system of FIG. 1 with the optical element attached to the frame;
  • FIG. 3 shows a sectional side view of a lighting device with a system according to FIG. 2
  • the optical system 1 shows an optical system 1 with a mounting frame 2 and an optical element 3 to be fastened to the frame 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 base body 4 which is open at the top and at the bottom and 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 fastening the support frame 2 to a ner, not shown here, light available.
  • 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 inside 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 enables an efficient reduction of the divergence of light, which in particular allows headlamps with sufficient brightness and a well-defined emission characteristic to be achieved.
  • 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, is only marginal to the 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 all the more pronounced the fewer projections 15 are used and the smaller the relative fastening area.
  • optical system 1 is produced by injection molding of the support frame 2, the Garrungsrah- men 2 and the optical element 3 thus intended not 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 inclined at different angles, wherein, nevertheless, direct connecting lines between a lower light entry surface 21 and an upper light exit surface 22 are substantially straight along them.
  • 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.
  • a TIR concentrator instead of a TIR concentrator but z.
  • a free-form, CPC, CEC or CHC-type concentrator can also be used.
  • general deflection prisms can be used.
  • 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 may, for example, be in the form of an LED module with a light-emitting diode chip or a plurality of light-emitting diode chips, or as a single housed LED ('LED lamp'), which preferably emits white, eg. 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, which results in a simple scalability of the light source. Electricity.
  • 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.

Landscapes

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

Abstract

L'invention concerne un cadre de fixation comportant au moins un élément optique fixé au cadre par moulage par injection. Pour le formage de faisceaux, le ou les éléments optiques sont au moins conçus par réflexion totale et/ou diffraction intérieures.
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 true EP2297515A1 (fr) 2011-03-23
EP2297515B1 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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Also Published As

Publication number Publication date
CN102099622B (zh) 2014-06-18
JP2011528164A (ja) 2011-11-10
JP5290414B2 (ja) 2013-09-18
US8552627B2 (en) 2013-10-08
CN102099622A (zh) 2011-06-15
US20110121708A1 (en) 2011-05-26
EP2297515B1 (fr) 2014-04-02
WO2010007028A1 (fr) 2010-01-21
DE102008033384A1 (de) 2010-01-21

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