EP3208531A3 - Motor vehicle headlight comprising a liquid crystal display - Google Patents

Motor vehicle headlight comprising a liquid crystal display Download PDF

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Publication number
EP3208531A3
EP3208531A3 EP17156657.3A EP17156657A EP3208531A3 EP 3208531 A3 EP3208531 A3 EP 3208531A3 EP 17156657 A EP17156657 A EP 17156657A EP 3208531 A3 EP3208531 A3 EP 3208531A3
Authority
EP
European Patent Office
Prior art keywords
liquid crystal
motor vehicle
crystal display
polarization direction
vehicle headlight
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
EP17156657.3A
Other languages
German (de)
French (fr)
Other versions
EP3208531B1 (en
EP3208531A2 (en
Inventor
Joachim Knittel
Martin Licht
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen 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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP3208531A2 publication Critical patent/EP3208531A2/en
Publication of EP3208531A3 publication Critical patent/EP3208531A3/en
Application granted granted Critical
Publication of EP3208531B1 publication Critical patent/EP3208531B1/en
Active 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
    • 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
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • 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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/135—Polarised

Abstract

Vorgestellt wird ein Kraftfahrzeugscheinwerfer mit einer Lichtquelle (24), einem polarisierenden Strahlteiler (26), der von der Lichtquelle (24) her einfallendes Licht in ein erstes Teilbündel (36) einer ersten Polarisationsrichtung und ein zweites Teilbündel (38) einer zweiten Polarisationsrichtung aufteilt, und mit einem ersten und einem zweiten reflektierenden Flüssigkristallmatrixelementbereich (28, 30), deren Einfluss auf die Polarisationsrichtung des reflektierten Lichtes steuerbar ist. Der Scheinwerfer zeichnet sich dadurch aus, dass die beiden Flüssigkristallmatrixelementbereiche vom Strahlteiler her einfallendes Licht zum Strahlteiler zurückreflektieren.

Figure imgaf001
Disclosed is a motor vehicle headlamp with a light source (24), a polarizing beam splitter (26) dividing light incident from the light source (24) into a first sub-beam (36) of a first polarization direction and a second sub-beam (38) of a second polarization direction and a first and a second reflective liquid crystal matrix element region (28, 30) whose influence on the polarization direction of the reflected light is controllable. The headlight is characterized in that the two liquid crystal matrix element areas reflect back incident light from the beam splitter to the beam splitter.
Figure imgaf001
EP17156657.3A 2016-02-19 2017-02-17 Motor vehicle headlight comprising a liquid crystal display Active EP3208531B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016102991.2A DE102016102991A1 (en) 2016-02-19 2016-02-19 Motor vehicle headlight with a liquid crystal display

Publications (3)

Publication Number Publication Date
EP3208531A2 EP3208531A2 (en) 2017-08-23
EP3208531A3 true EP3208531A3 (en) 2017-10-25
EP3208531B1 EP3208531B1 (en) 2020-04-01

Family

ID=58094247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17156657.3A Active EP3208531B1 (en) 2016-02-19 2017-02-17 Motor vehicle headlight comprising a liquid crystal display

Country Status (2)

Country Link
EP (1) EP3208531B1 (en)
DE (1) DE102016102991A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017109679A1 (en) * 2017-05-05 2018-11-08 Jos. Schneider Optische Werke Gmbh Apparatus and method for generating an output light emission and headlights
CN106939992A (en) 2017-05-14 2017-07-11 上海小糸车灯有限公司 A kind of lamp system based on PBS optical splitters
FR3079599A1 (en) * 2018-03-29 2019-10-04 Valeo Vision LIGHT SIGNALING DEVICE WITH LCD DISPLAY
US11880030B2 (en) 2020-02-24 2024-01-23 Google Llc Programmable injector grid plate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6328447B1 (en) * 1997-12-03 2001-12-11 Seiko Epson Corporation Projection device
GB2465887A (en) * 2008-12-04 2010-06-09 Bosch Gmbh Robert Projection device for producing a virtual image
JP2010176981A (en) * 2009-01-28 2010-08-12 Stanley Electric Co Ltd Lighting tool for vehicle
EP2275735A1 (en) * 2009-07-14 2011-01-19 Koito Manufacturing Co., Ltd. Vehicular headlamp
DE102013113807A1 (en) * 2013-12-11 2015-06-11 Hella Kgaa Hueck & Co. Lighting device for a motor vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3006746B1 (en) 2013-06-11 2017-12-08 Valeo Vision PROJECTOR FOR A MOTOR VEHICLE COMPRISING A LASER LIGHT SOURCE
US10174894B2 (en) * 2014-12-11 2019-01-08 Stanley Electric Co., Ltd. Vehicle headlamp unit and vehicle headlamp system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6328447B1 (en) * 1997-12-03 2001-12-11 Seiko Epson Corporation Projection device
GB2465887A (en) * 2008-12-04 2010-06-09 Bosch Gmbh Robert Projection device for producing a virtual image
JP2010176981A (en) * 2009-01-28 2010-08-12 Stanley Electric Co Ltd Lighting tool for vehicle
EP2275735A1 (en) * 2009-07-14 2011-01-19 Koito Manufacturing Co., Ltd. Vehicular headlamp
DE102013113807A1 (en) * 2013-12-11 2015-06-11 Hella Kgaa Hueck & Co. Lighting device for a motor vehicle

Also Published As

Publication number Publication date
EP3208531B1 (en) 2020-04-01
EP3208531A2 (en) 2017-08-23
DE102016102991A1 (en) 2017-08-24

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