AU663897B2 - Electro-optical device having variable light transmission - Google Patents

Electro-optical device having variable light transmission

Info

Publication number
AU663897B2
AU663897B2 AU28932/92A AU2893292A AU663897B2 AU 663897 B2 AU663897 B2 AU 663897B2 AU 28932/92 A AU28932/92 A AU 28932/92A AU 2893292 A AU2893292 A AU 2893292A AU 663897 B2 AU663897 B2 AU 663897B2
Authority
AU
Australia
Prior art keywords
electro
cell
light transmission
optical device
variable light
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
AU28932/92A
Other versions
AU2893292A (en
Inventor
Joachim Grupp
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.)
Asulab AG
Original Assignee
Asulab AG
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
Priority claimed from CH321891A external-priority patent/CH685176A5/en
Priority claimed from FR9115768A external-priority patent/FR2685102B1/en
Application filed by Asulab AG filed Critical Asulab AG
Publication of AU2893292A publication Critical patent/AU2893292A/en
Application granted granted Critical
Publication of AU663897B2 publication Critical patent/AU663897B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Liquid Crystal (AREA)
  • Eyeglasses (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

An electro-optical device having variable light transmission and including: at least one lens consisting of an electro-optical cell (4) with a first plate (6) and a second plate (8) each having a control electrode (14, 16), and a sealing frame placed between said plates to form a sealed space enclosing an electro-optical material (12); and a voltage generator (18) connected to the electrodes in order to apply a variable voltage to the material and thereby automatically or manually alter the light transmissivity of the cell (4) according to the existing light. Said cell (4) includes at least one element (6) loaded with a photochromic substance of which the absorbency changes reversibly according to the existing light strength. The device is used particularly in eye protection devices.
AU28932/92A 1991-11-05 1992-10-31 Electro-optical device having variable light transmission Ceased AU663897B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH3218/91 1991-11-05
CH321891A CH685176A5 (en) 1991-11-05 1991-11-05 Variable light transmitting electro-optical device for eye protection
FR9115768 1991-12-17
FR9115768A FR2685102B1 (en) 1991-12-17 1991-12-17 ELECTRO-OPTICAL DEVICE WITH VARIABLE TRANSPARENCY.
PCT/EP1992/002503 WO1993008774A1 (en) 1991-11-05 1992-10-31 Electro-optical device having variable light transmission

Publications (2)

Publication Number Publication Date
AU2893292A AU2893292A (en) 1993-06-07
AU663897B2 true AU663897B2 (en) 1995-10-26

Family

ID=25692484

Family Applications (1)

Application Number Title Priority Date Filing Date
AU28932/92A Ceased AU663897B2 (en) 1991-11-05 1992-10-31 Electro-optical device having variable light transmission

Country Status (11)

Country Link
EP (1) EP0565684B1 (en)
JP (1) JPH06504146A (en)
KR (1) KR930702929A (en)
AT (1) ATE136763T1 (en)
AU (1) AU663897B2 (en)
BR (1) BR9205510A (en)
CA (1) CA2098825A1 (en)
DE (1) DE69210010T2 (en)
ES (1) ES2088599T3 (en)
SG (1) SG65551A1 (en)
WO (1) WO1993008774A1 (en)

Families Citing this family (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
EP1648361A1 (en) * 2003-07-10 2006-04-26 Lightswitch Safety Systems, Inc. Light sensor arrangement for auto-darkening lenses and method
WO2014071179A2 (en) * 2012-11-01 2014-05-08 Thermalens, Llc Thermally influenced changeable tint device
FR3010941B1 (en) * 2013-09-26 2017-01-13 Valeo Vision DEVICE AND METHOD FOR DRIVING ASSISTANCE
JP6880584B2 (en) * 2016-07-12 2021-06-02 株式会社リコー Dimming device and dimming method
EP3617786B1 (en) * 2017-04-28 2022-12-28 LG Chem, Ltd. Optical modulation device
US11392006B2 (en) * 2018-09-04 2022-07-19 Lg Chem, Ltd. Transmittance-variable device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169417A (en) * 1984-12-28 1986-07-09 Olympus Optical Co Liquid crystal lens having a variable focal length
AU612614B2 (en) * 1987-02-12 1991-07-18 Bernard Rosen Welding helmet

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2553976A1 (en) * 1974-12-02 1976-06-16 Hermann Budmiger LIGHT PROTECTION FILTER
CH629001A5 (en) * 1978-02-06 1982-03-31 Ebauches Sa Display unit electro-optical passive.
EP0091514B1 (en) * 1982-04-14 1987-06-16 André M. Eggenschwiler Protective light filter, in particular for protective shields or welding glasses
SE464264B (en) * 1984-02-24 1991-03-25 Esab Ab OPTICAL FILTER FOR WELDING GLASS
IT1190508B (en) * 1986-03-24 1988-02-16 Daniele Senatore ADJUSTABLE TRANSPARENCY GLASSES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169417A (en) * 1984-12-28 1986-07-09 Olympus Optical Co Liquid crystal lens having a variable focal length
AU612614B2 (en) * 1987-02-12 1991-07-18 Bernard Rosen Welding helmet

Also Published As

Publication number Publication date
ATE136763T1 (en) 1996-05-15
ES2088599T3 (en) 1996-08-16
DE69210010D1 (en) 1996-05-23
DE69210010T2 (en) 1996-11-07
EP0565684A1 (en) 1993-10-20
WO1993008774A1 (en) 1993-05-13
BR9205510A (en) 1994-04-26
CA2098825A1 (en) 1993-05-06
EP0565684B1 (en) 1996-04-17
SG65551A1 (en) 1999-06-22
KR930702929A (en) 1993-11-29
AU2893292A (en) 1993-06-07
JPH06504146A (en) 1994-05-12

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired