EP3411625A1 - Lighting unit for a motor vehicle - Google Patents
Lighting unit for a motor vehicleInfo
- Publication number
- EP3411625A1 EP3411625A1 EP17702755.4A EP17702755A EP3411625A1 EP 3411625 A1 EP3411625 A1 EP 3411625A1 EP 17702755 A EP17702755 A EP 17702755A EP 3411625 A1 EP3411625 A1 EP 3411625A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- heat sink
- lighting unit
- sink
- unit
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 239000002826 coolant Substances 0.000 claims abstract description 23
- 238000005286 illumination Methods 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 6
- 239000003570 air Substances 0.000 claims description 3
- 239000012080 ambient air Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000000110 cooling liquid Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
- F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/42—Forced cooling
- F21S45/43—Forced cooling using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/42—Forced cooling
- F21S45/46—Forced cooling using liquid
-
- 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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- 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 lighting unit for a motor vehicle, which comprises a light module and a mirror module, wherein the mirror module is adapted to reflect the light emission generated by the light module in the emission direction of the lighting unit.
- the photograph in the sense used corresponds to a projection onto a vertical surface in accordance with the relevant standards relating to automotive lighting technology.
- Lighting units developed that form a variably controllable reflector surface of a plurality of micromirrors and reflect a light emission that generates a light source in the emission of the illumination unit. Such lighting devices are advantageous in vehicle construction in terms of their very flexible light distribution, since the illumination intensity can be controlled individually for each pixel and any
- Light distributions can be realized, such as a low beam light distribution, a cornering light distribution, a city light distribution, a motorway light distribution, a bend light distribution, a high beam light distribution or the image of glare-free high beam.
- DLP® Digital Light Processing
- the light beam is divided into pixels by a rectangular arrangement of movable micromirrors and then reflected pixelwise, either into the projection path or out of the projection path.
- DMD Digital Micromirror Device
- a DMD microsystem is a surface light modulator (Spatial Light Modulator, SLM), which consists of matrix-like arranged micro-mirror actuators, that is ver tiltable reflecting surfaces with an edge length of about 16 ⁇ .
- SLM Surface Light Modulator
- Each micromirror is individually adjustable in angle and usually has two stable
- the number of mirrors corresponds to the resolution of the projected image, where a mirror can represent one or more pixels. Meanwhile, DMD chips with high resolutions in the megapixel range are available.
- the underlying technology for the adjustable individual mirrors is the Micro-Electro-Mechanical Systems (MEMS)
- the Analog Micromirror Device (AMD) technology has the property of adjusting the individual mirrors in variable mirror positions can.
- Micromirror device When illuminating the component with light, about 90% of the light is reflected as intended, but about 10% is absorbed by the component as a reflection loss and converted into heat. The efficiency is predominantly determined by the fact that the individual micromirrors have a distance from one another in order to be able to move. The area between each Mikrospiegem is illuminated by the light and thereby heat is absorbed. The heat must be dissipated suitably, for example by a cooling system. In addition, the light which is not reflected in the irradiation direction of the illumination unit must be properly absorbed.
- An object of the present invention is to provide a lighting unit with a micromirror component and a cooling system which is particularly inexpensive, compact and effective.
- the light module comprising at least one light source and a first heat sink
- the mirror module comprising a mirror unit and a second heat sink
- a cooling system comprising at least one inlet, at least one outlet, at least one duct, at least one flow unit, a cooling medium, a first cooling sink and a second cooling sink, wherein the inlet and outlet are connected by the conduit, and inserting the flow unit into the conduit is to generate a flow of the cooling medium in the conduit and thereby sucks the cooling medium through the inlet and expelled through the outlet, and the first cooling sink is formed by the first heat sink of the light module, and the second cooling sink through the second heat sink of the mirror module is formed, wherein the first cooling sink is arranged downstream of the second cooling sink.
- the invention makes use of the fact that both the mirror unit and the light source itself are cooled and the advantages according to the invention are achieved by designing a common cooling of these two spatially separate cooling sinks.
- the selected sequence is particularly suitable, which results in a favorable influence, inter alia, on a longer service life of the electronics.
- Flow unit is inserted between the first heat sink and the second heat sink in the line.
- the first heat sink is inserted into the line upstream of the outlet or is arranged downstream of the outlet in such a way that the first heat sink is cooled by the ejected cooling medium.
- the second heat sink is inserted into the line downstream of the inlet or is arranged in front of the inlet such that the second heat sink is cooled by the suctioned cooling medium.
- Cooling system passes through the first heat sink of the light module or rests on this. Likewise, when the line of the cooling system through the second heat sink of the mirror module runs or rests on this.
- both air such as ambient air
- a fluid eg, cooling fluid or oil
- a cycle is created for the cooling medium by the inlet and outlet are connected together and another cooling sink in the circuit is inserted. The choice is made after a required cooling capacity, which among other things of the light source used and a required light output and of
- the line can then as air duct or as
- the single-circuit design of the cooling system results in cost advantages, a reduced number of system components and a compact design is made possible.
- a semiconductor light source in the light module in order to reduce the generation of waste heat there and consequently make the cooling system compact and inexpensive.
- Examples include power LEDs and semiconductor lasers.
- DMD digital or analog micromirror array
- AMD digital or analog micromirror array
- Fig. 1 is a perspective view from the front of an inventive
- FIG. 2 is a view from above of the illumination unit with the position of section A-A, Fig. 3, the illumination unit in section A-A,
- Fig. 5 is a rear perspective view of the lighting unit with a second
- Fig. 6 is a rear perspective view of the lighting unit without the second
- Fig. 7 is a front perspective view of the cooling system.
- a lighting unit according to the invention With reference to Fig. 1, an embodiment of the invention will now be explained in more detail.
- the important for a lighting unit according to the invention parts are shown, it being understood that a lighting unit still many other parts contains, which allow a meaningful use in a headlight in a motor vehicle, in particular a car or motorcycle.
- FIGS. 1 to 6 show an overview of an illumination unit 1 for a motor vehicle and in different perspectives.
- the light emission generated by a light module 2 is reflected at a mirror module 3 in the emission direction of the illumination unit.
- the light module 2 comprises a light source 4, preferably a semiconductor light source, for example a power LED, and a first heat sink 5.
- the first heat sink 5 and the light source 4 are thermally conductive connected to each other, for example by a direct mechanical contact of these two components.
- the mirror module 3 comprises a mirror unit 6 and a second heat sink 7.
- the mirror unit preferably comprises a digital or analog micromirror array (AMD, analogue micro mirror device or DMD, digital micro mirror device).
- AMD analogue micro mirror device
- DMD digital micro mirror device
- the second heat sink 7 and the mirror unit 6 are thermally conductive connected to each other, for example, by a direct mechanical contact of these two components.
- a cooling system 8 is arranged in the lighting unit 1, which comprises an inlet 9, an outlet 10, a line 11, a flow unit 12, a cooling medium, in this case ambient air, a first cooling sink and a second cooling sink.
- the inlet 9 and the outlet 10 are connected by the conduit 11, and the
- Flow unit 12 in this embodiment a fan, is inserted in conduit 11 to create a flow of cooling medium in conduit 11.
- Light module 2 is formed, and the second cooling sink is formed by the second heat sink 7 of the mirror module 3, wherein the first cooling sink is arranged downstream of the second cooling sink.
- the flow unit 12 is between the first heat sink 5 and the second
- the second heat sink 7 is arranged in front of the inlet 9 such that the second heat sink 7 is cooled by the sucked cooling medium.
- the first heat sink 5 of the light module 2 is here from the second heat sink 7 of the
- FIG. 7 shows a detailed view of the portions of the cooling system 8 of the illumination unit 1. For better understanding, no holder and no imaging optics are shown.
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)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50059/2016A AT518220B1 (en) | 2016-02-02 | 2016-02-02 | Lighting unit for a motor vehicle |
PCT/AT2017/060005 WO2017132713A1 (en) | 2016-02-02 | 2017-01-13 | Lighting unit for a motor vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3411625A1 true EP3411625A1 (en) | 2018-12-12 |
EP3411625B1 EP3411625B1 (en) | 2019-12-25 |
Family
ID=57960168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17702755.4A Active EP3411625B1 (en) | 2016-02-02 | 2017-01-13 | Lighting unit for a motor vehicle |
Country Status (8)
Country | Link |
---|---|
US (1) | US10641455B2 (en) |
EP (1) | EP3411625B1 (en) |
JP (1) | JP6793756B2 (en) |
KR (1) | KR102088228B1 (en) |
CN (1) | CN108700270B (en) |
AT (1) | AT518220B1 (en) |
ES (1) | ES2775434T3 (en) |
WO (1) | WO2017132713A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3522682B1 (en) * | 2018-02-06 | 2020-07-29 | ZKW Group GmbH | Circuit arrangement, lighting device and vehicle headlight |
DE102018105430A1 (en) | 2018-03-09 | 2019-09-12 | HELLA GmbH & Co. KGaA | Lighting device for vehicles |
FR3079283B1 (en) * | 2018-03-23 | 2020-10-02 | Valeo Vision | LIGHTING MODULE EQUIPPED WITH A MATRIX OF MICRO-MIRRORS WITH OPTIMIZED COOLING |
JP7168354B2 (en) * | 2018-06-18 | 2022-11-09 | スタンレー電気株式会社 | vehicle lamp |
FR3097940B1 (en) * | 2019-06-28 | 2021-12-10 | Valeo Vision | LIGHTING DEVICE FOR VEHICLES WITH VARIABLE OPTICAL AXIS TECHNICAL FIELD |
WO2021039633A1 (en) * | 2019-08-26 | 2021-03-04 | 株式会社小糸製作所 | Vehicular lamp and lamp unit |
CN212644476U (en) * | 2019-08-26 | 2021-03-02 | 株式会社小糸制作所 | Vehicle lamp |
DE102021111933A1 (en) * | 2021-05-07 | 2022-11-10 | HELLA GmbH & Co. KGaA | Cooling device for a lighting device of a motor vehicle |
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-
2016
- 2016-02-02 AT ATA50059/2016A patent/AT518220B1/en active
-
2017
- 2017-01-13 KR KR1020187024773A patent/KR102088228B1/en active IP Right Grant
- 2017-01-13 WO PCT/AT2017/060005 patent/WO2017132713A1/en active Application Filing
- 2017-01-13 ES ES17702755T patent/ES2775434T3/en active Active
- 2017-01-13 JP JP2018558450A patent/JP6793756B2/en active Active
- 2017-01-13 US US16/074,193 patent/US10641455B2/en active Active
- 2017-01-13 CN CN201780009297.XA patent/CN108700270B/en active Active
- 2017-01-13 EP EP17702755.4A patent/EP3411625B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
KR102088228B1 (en) | 2020-03-13 |
WO2017132713A1 (en) | 2017-08-10 |
JP6793756B2 (en) | 2020-12-02 |
AT518220B1 (en) | 2017-11-15 |
KR20180107191A (en) | 2018-10-01 |
US10641455B2 (en) | 2020-05-05 |
ES2775434T3 (en) | 2020-07-27 |
EP3411625B1 (en) | 2019-12-25 |
AT518220A1 (en) | 2017-08-15 |
US20190316751A1 (en) | 2019-10-17 |
CN108700270B (en) | 2021-09-14 |
CN108700270A (en) | 2018-10-23 |
JP2019505084A (en) | 2019-02-21 |
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