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DE4231300A1 - Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level - Google Patents

Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level

Info

Publication number
DE4231300A1
DE4231300A1 DE19924231300 DE4231300A DE4231300A1 DE 4231300 A1 DE4231300 A1 DE 4231300A1 DE 19924231300 DE19924231300 DE 19924231300 DE 4231300 A DE4231300 A DE 4231300A DE 4231300 A1 DE4231300 A1 DE 4231300A1
Authority
DE
Germany
Prior art keywords
unit
liquid crystal
crystal layer
view mirror
liquid crystals
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.)
Ceased
Application number
DE19924231300
Other languages
German (de)
Inventor
Erfinder Wird Nachtraeglich Benannt Der
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19924231300 priority Critical patent/DE4231300A1/en
Publication of DE4231300A1 publication Critical patent/DE4231300A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G02C7/101—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having an electro-optical light valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
    • B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
    • B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)

Abstract

The darkening device uses a nematic liquid crystal layer, controlled by an applied voltage to regulate the quantity of light transmitted. Pref. the voltage applied to the liquid crystal layer is controlled via an auxiliary light sensor circuit, for monitoring the amount light level. The voltage is applied across transparent electrode coatings on opposite sides of the liquid crystal layer inserted in front of a rear view mirror, spectacle lens, viewer lens or light source. USE - For regulating transmitted light level to prevent dazzle.

Description

Wenn sich Flüssigkristalle, die in nematischer Phase sind und sich zwischen zwei planparallelen Glasplatten oder Plastikplatten mit geringerem Abstand befinden, so daß die Domänen durch Rand­ wirkung einheitlich orientiert sind und die Flüssigkeit (Flüssig­ kristalle) klar erscheint und die Planarparallelplatten auf ihren Innenseiten durchsichtige elektrische stromleitende Beläge (Elek­ troden) besitzen, und wenn auf die benachbarten Beläge eine Spannung angelegt wird, dann fließt ein Ionen-Strom durch das Medium, damit wächst die Lichtstreuung stark an, so daß das Medium auf dieser Stelle undurchsichtig wird.If there are liquid crystals that are in the nematic phase and between two plane-parallel glass plates or plastic plates are located closer together so that the domains are bordered by effect are uniformly oriented and the liquid (liquid crystals) appears clear and the planar parallel plates on their Inside transparent electrical current-carrying coverings (elec toden), and if one on the neighboring rubbers Voltage is applied, then an ion current flows through it Medium, so that the light scatter increases strongly, so that the medium becomes opaque at this point.

Dieses System - weiter nur Einheit - besteht aus planparallelen durchsichtigen Platten mit innenseitlich durchsichtigen leitenden Belägen, zwischen den sich Medium aus Flüssigkristallen in nema­ tischer Phase befindet.This system - still just a unit - consists of plane-parallel ones transparent plates with inside transparent conductive Coverings, between which there is a medium of liquid crystals in nema phase.

Wenn diese Einheit auf einen Spiegel gelegt wird und auf die leitenden Beläge Spannung eingeschlossen wird, dann werden sich die Flüssigkristalle verdunkeln und damit wird die von dem hinter­ stehenden Spiegel reflektierte Lichtmenge geringer.When this unit is placed on a mirror and on the conductive coverings voltage is included, then the Darken liquid crystals and thus the one behind standing mirror reflected less amount of light.

Wenn diese oben beschriebene Einheit, mit Hilfe eines elektro­ nischen Zusatzkreises der mit einem lichtempfindlichen Sensor, der die Spannungsmenge auf den Elektroden regelt, gesteuert ist, vor einem Kraftfahrzeug-Rückspiegel genutzt wird, dann wird sich so ein Rückspiegel durch Wirkung einer größeren Lichtmenge auto­ matisch verdunkeln. Vorteile so eines KFZ-Rückspiegels sind die, daß der Fahrer von der Blendung automatisch, ohne sein Eingreifen geschützt wird. Damit wird eine Menge zur Sicherheit im Straßen­ verkehr beigetragen.If this unit described above, using an electro additional circuit with a light-sensitive sensor, which regulates the amount of voltage on the electrodes, is controlled, is used in front of a motor vehicle rear-view mirror, then will such a rearview mirror by the effect of a larger amount of light auto darken thematically. The advantages of such a vehicle rear-view mirror are that that the driver from the glare automatically without his intervention is protected. This makes a lot of road safety contributed to traffic.

Claims (1)

Hiermit wird beansprucht:
1. daß die Einheit mit Flüssigkristallen in nematischer Phase ist.
2. daß die leitenden Belege (Elektroden) nicht nur auf Glas-, sondern auch auf allen durchsichtigen Plastik-Trägern angebracht werden können.
3. daß die Einheit aus Flüssigkristallen in nematischer Phase als Verdunkelungseinheit vor beliebigen Spiegel gesetzt werden kann.
4. daß wenn die Einheit vor einem Rückspiegel im Fahrzeug angebracht wird, wird der Fahrer vor Blendung durch die hinter ihm fahrenden Fahrzeuge geschützt.
5. daß die Verdunkelungseinheit aus Flüssigkristallen in nematischer Phase nicht nur als Rückspiegelverdunkelung, sondern auch als Lichtmenge-Regulator bei jeglichen Beleuchtungsquellen genutzt werden kann.
6. daß die Verdunkelungseinheit aus Flüssigkristallen in nematischer Phase auch als Lichtmenge-Regulator für Brille und Beobachtungsvisier sowie Visier aller Art genutzt werden kann.
7. daß die Steuereinheit für die Verdunkelungseinheit aus Flüssigkristallen in nematischer Phase Fotozelle oder Solarzelle sein kann, die gleich die Spannung für die Elektroden liefert.
8. daß die Einheit für verbesserten Kontrast mit Polarisa­ tionsfilter beschichtet sein kann.
9. daß die hintere Elektrode die Einheit gleichzeitig als spiegelnde Fläche sein kann.Hereby is claimed:
1. that the unit with liquid crystals is in the nematic phase.
2. that the conductive documents (electrodes) can be attached not only on glass, but also on all transparent plastic carriers.
3. that the unit made of liquid crystals in the nematic phase can be placed as a blackout unit in front of any mirror.
4. that if the unit is installed in front of a rear view mirror in the vehicle, the driver is protected from glare from the vehicles driving behind him.
5. that the darkening unit made of liquid crystals in the nematic phase can be used not only as a rear-view mirror darkening, but also as a light quantity regulator for any lighting source.
6. that the darkening unit made of liquid crystals in the nematic phase can also be used as a light quantity regulator for glasses and observation visor as well as all kinds of visors.
7. that the control unit for the darkening unit made of liquid crystals in the nematic phase can be a photocell or solar cell, which supplies the voltage for the electrodes.
8. that the unit can be coated with polarization filter for improved contrast.
9. that the rear electrode can be the unit at the same time as a reflective surface.
DE19924231300 1992-09-18 1992-09-18 Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level Ceased DE4231300A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924231300 DE4231300A1 (en) 1992-09-18 1992-09-18 Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924231300 DE4231300A1 (en) 1992-09-18 1992-09-18 Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level

Publications (1)

Publication Number Publication Date
DE4231300A1 true DE4231300A1 (en) 1994-03-31

Family

ID=6468293

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924231300 Ceased DE4231300A1 (en) 1992-09-18 1992-09-18 Darkening device for vehicle rear view mirror, spectacles, viewer, or light source - uses voltage applied across nematic-phase liquid crystal layer to regulate transmitted light level

Country Status (1)

Country Link
DE (1) DE4231300A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036783A1 (en) * 2005-08-02 2007-02-22 Magna Donnelly Gmbh & Co.Kg Rearview mirror for a vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340670A1 (en) * 1983-11-10 1985-05-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronically switchable mirror
DE3511385A1 (en) * 1984-03-28 1985-10-10 Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi GLARE-FREE REAR MIRROR DEVICE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340670A1 (en) * 1983-11-10 1985-05-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronically switchable mirror
DE3511385A1 (en) * 1984-03-28 1985-10-10 Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi GLARE-FREE REAR MIRROR DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036783A1 (en) * 2005-08-02 2007-02-22 Magna Donnelly Gmbh & Co.Kg Rearview mirror for a vehicle
DE102005036783B4 (en) * 2005-08-02 2007-06-14 Magna Donnelly Gmbh & Co.Kg Rearview mirror for a vehicle

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection