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DE3842824A1 - Light protection glass with liquid crystal - Google Patents

Light protection glass with liquid crystal

Info

Publication number
DE3842824A1
DE3842824A1 DE19883842824 DE3842824A DE3842824A1 DE 3842824 A1 DE3842824 A1 DE 3842824A1 DE 19883842824 DE19883842824 DE 19883842824 DE 3842824 A DE3842824 A DE 3842824A DE 3842824 A1 DE3842824 A1 DE 3842824A1
Authority
DE
Germany
Prior art keywords
light
protection glass
liquid crystal
light protection
photocells
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.)
Withdrawn
Application number
DE19883842824
Other languages
German (de)
Inventor
Wilhelm Dipl Ing Ruschhaupt
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 DE19883842824 priority Critical patent/DE3842824A1/en
Publication of DE3842824A1 publication Critical patent/DE3842824A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06—Masks, shields or hoods for welders
    • A61F9/065—Masks, shields or hoods for welders use of particular optical filters
    • A61F9/067—Masks, shields or hoods for welders use of particular optical filters with variable transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

Published without abstract.

Description

Bei Arbeiten mit sehr hellem Licht, z. B. Elektroschweißen, müssen die Augen vor diesem geschützt werden, was üblicherweise mit getönten Gläsern geschieht. Diese behindern aber die Sicht bei normalem Licht, etwa beim Ansetzen der Schweißelektrode.When working with very bright light, e.g. B. electric welding, the eyes must be protected from this, which is usually happens with tinted glasses. However, these obstruct the view normal light, for example when attaching the welding electrode.

Es wird ein Lichtschutzglas mit Flüssigkristall-Schicht vorgeschlagen, dessen Lichtdurchlässigkeit abhängig von der Helligkeit des Lichtes gesteuert wird, das in seiner Nähe angebrachte oder im Lichtschutzglas integrierte Fotozellen trifft. Ein solches Glas (wie es auch für Ziffernanzeigen von Taschenrechnern verwendet wird) ist im spannungslosen Zustand transparent, beim Anlegen einer Spannung an die Elektroden der Flüssigkristallschicht ändert sich das Gefüge der Kristallschicht so, daß es stark lichtundurchlässig wird. Wird diese Spannung genau in dem Augenblick angelegt, in dem das Licht sehr hell wird, werden die Augen vor diesem geschützt. Dies ist der Fall, wenn die Steuerspannung von Fotozellen kommt, auf die das Licht fällt.It becomes a light protection glass with a liquid crystal layer proposed whose light transmission depends on the Brightness of the light that is controlled in its vicinity photocells attached or integrated in the light protection glass meets. Such a glass (as is also the case for digital displays from Calculators is used) is in a de-energized state transparent when applying a voltage to the electrodes of the Liquid crystal layer changes the structure of the crystal layer so that it becomes very opaque. Will this tension created at the very moment when the light becomes very bright, the eyes are protected from this. This is the case if the Control voltage comes from photocells on which the light falls.

Zur Anpassung an verschiedene Helligkeiten kann eine Kombination mehrerer Flüssigkristallschichten vorgesehen werden, auch können sie mit passiven optischen Filtern, etwa für UV-Licht, kombiniert werden.A combination can be used to adapt to different brightnesses several liquid crystal layers can also be provided combined with passive optical filters, such as for UV light will.

Diese Lichtschutzfilter sind zum Schutz der Augen bei allen Arbeiten mit grellem Licht geeignet, z. B. Arbeiten mit Lasern, mit Schmelzen, Scheinwerfern und vor allem bei Elektroschweißen.These sunscreen filters are designed to protect the eyes of everyone Suitable for working with bright light, e.g. B. Working with lasers Melting, spotlights and especially with electric welding.

Claims (4)

1. Lichtschutzglas für den Umgang mit sehr hellem Licht, dadurch gekennzeichnet, daß es mit einer Flüssigkristall-Schicht aufgebaut ist, dessen Lichtdurchlässigkeit von einer angelegten elektrischen Spannung abhängt, die von Fotozellen erzeugt wird, auf die das Licht fällt.1. light protection glass for handling very bright light, characterized in that it is constructed with a liquid crystal layer, the light transmission depends on an applied electrical voltage generated by photocells to which the light falls. 2. Lichtschutzglas nach Anspruch 1, dadurch gekennzeichnet, daß die Fotozellen im Lichtschutzglas integriert sind.2. Light protection glass according to claim 1, characterized in that the photocells are integrated in the light protection glass. 3. Lichtschutzglas nach Anspruch 1, dadurch gekennzeichnet, daß es aus mehreren Flüssigkeitskristall-Schichten aufgebaut ist, von denen nur so viele dunkel geschaltet werden, wie für die jeweilige Helligkeit nötig ist, weil die einzelnen Schichten von einer verschiedene Anzahl von Fotozellen gesteuert werden.3. light protection glass according to claim 1, characterized in that it is made up of several liquid crystal layers, of which only as many are darkened as for the respective brightness is necessary because the individual layers controlled by a different number of photocells. 4. Lichtschutzglas nach Anspruch 1, dadurch gekennzeichnet, daß mit normalen (passiven) Filtern, etwa für UV-Licht, kombiniert ist.4. light protection glass according to claim 1, characterized in that with normal (passive) filters, for example for UV light, is combined.
DE19883842824 1988-12-20 1988-12-20 Light protection glass with liquid crystal Withdrawn DE3842824A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883842824 DE3842824A1 (en) 1988-12-20 1988-12-20 Light protection glass with liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883842824 DE3842824A1 (en) 1988-12-20 1988-12-20 Light protection glass with liquid crystal

Publications (1)

Publication Number Publication Date
DE3842824A1 true DE3842824A1 (en) 1990-06-21

Family

ID=6369597

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883842824 Withdrawn DE3842824A1 (en) 1988-12-20 1988-12-20 Light protection glass with liquid crystal

Country Status (1)

Country Link
DE (1) DE3842824A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327051A1 (en) * 1993-08-12 1994-05-19 Peter Schulthess Programmable electronic occlusion spectacles with liq. crystal valve - are remotely operable by hand or foot of specialist in course of rapid measurements on unaccommodated eye
EP0678288A2 (en) * 1994-04-22 1995-10-25 Xelux Holding Ag Device to protect against glare
US5751258A (en) * 1991-03-25 1998-05-12 Osd Envizion, Inc. Liquid crystal lens driver electronics for eye protection, high speed shuttering with consistent performance
US7477330B2 (en) 2005-03-09 2009-01-13 3M Innovative Properties Company Automatic darkening filter with offset polarizers
US7637622B2 (en) 2005-10-11 2009-12-29 3M Innovative Properties Company Control of an automatic darkening filter
US8042958B2 (en) 2005-06-20 2011-10-25 3M Innovative Properties Company Automatic darkening filter with automatic power management
US9956118B2 (en) 2014-09-15 2018-05-01 3M Innovative Properties Company Personal protective system tool communication adapter

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751258A (en) * 1991-03-25 1998-05-12 Osd Envizion, Inc. Liquid crystal lens driver electronics for eye protection, high speed shuttering with consistent performance
DE4327051A1 (en) * 1993-08-12 1994-05-19 Peter Schulthess Programmable electronic occlusion spectacles with liq. crystal valve - are remotely operable by hand or foot of specialist in course of rapid measurements on unaccommodated eye
EP0678288A2 (en) * 1994-04-22 1995-10-25 Xelux Holding Ag Device to protect against glare
EP0678288A3 (en) * 1994-04-22 1995-11-22 Xelux Ag
US7477330B2 (en) 2005-03-09 2009-01-13 3M Innovative Properties Company Automatic darkening filter with offset polarizers
US7884888B2 (en) 2005-03-09 2011-02-08 3M Innovative Properties Company Automatic darkening filter with offset polarizers
US8042958B2 (en) 2005-06-20 2011-10-25 3M Innovative Properties Company Automatic darkening filter with automatic power management
US7637622B2 (en) 2005-10-11 2009-12-29 3M Innovative Properties Company Control of an automatic darkening filter
US7810937B2 (en) 2005-10-11 2010-10-12 3M Innovative Properties Company Control of an automatic darkening filter
US8047664B2 (en) 2005-10-11 2011-11-01 3M Innovative Properties Company Control of an automatic darkening filter
US9956118B2 (en) 2014-09-15 2018-05-01 3M Innovative Properties Company Personal protective system tool communication adapter
US11090192B2 (en) 2014-09-15 2021-08-17 3M Innovative Properties Company Personal protective system tool communication adapter

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Legal Events

Date Code Title Description
8130 Withdrawal