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SG65551A1 - Variable transparency electro-optical device - Google Patents

Variable transparency electro-optical device

Info

Publication number
SG65551A1
SG65551A1 SG1996001826A SG1996001826A SG65551A1 SG 65551 A1 SG65551 A1 SG 65551A1 SG 1996001826 A SG1996001826 A SG 1996001826A SG 1996001826 A SG1996001826 A SG 1996001826A SG 65551 A1 SG65551 A1 SG 65551A1
Authority
SG
Singapore
Prior art keywords
electro
cell
optical device
optical
plate
Prior art date
Application number
SG1996001826A
Inventor
Joachim Grupp
Original Assignee
Asulab Sa
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 Sa filed Critical Asulab Sa
Publication of SG65551A1 publication Critical patent/SG65551A1/en

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)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Eyeglasses (AREA)
  • Liquid Crystal (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.
SG1996001826A 1991-11-05 1992-10-31 Variable transparency electro-optical device SG65551A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH321891A CH685176A5 (en) 1991-11-05 1991-11-05 Variable light transmitting electro-optical device for eye protection
FR9115768A FR2685102B1 (en) 1991-12-17 1991-12-17 ELECTRO-OPTICAL DEVICE WITH VARIABLE TRANSPARENCY.

Publications (1)

Publication Number Publication Date
SG65551A1 true SG65551A1 (en) 1999-06-22

Family

ID=25692484

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996001826A SG65551A1 (en) 1991-11-05 1992-10-31 Variable transparency electro-optical device

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 (8)

* 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
RU2181213C2 (en) * 2000-07-11 2002-04-10 Образцов Николай Львович Method protecting eyes from glaring optical radiation
EP1648361A1 (en) 2003-07-10 2006-04-26 Lightswitch Safety Systems, Inc. Light sensor arrangement for auto-darkening lenses and method
KR102087795B1 (en) * 2012-11-01 2020-03-11 에씰로 앙터나시오날 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
EP3617785B1 (en) * 2017-04-28 2023-02-15 LG Chem, Ltd. Optical modulation device
US11392006B2 (en) * 2018-09-04 2022-07-19 Lg Chem, Ltd. Transmittance-variable device

Family Cites Families (7)

* 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.
DE3276596D1 (en) * 1982-04-14 1987-07-23 Eggenschwiler Andre M 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
GB2169417A (en) * 1984-12-28 1986-07-09 Olympus Optical Co Liquid crystal lens having a variable focal length
IT1190508B (en) * 1986-03-24 1988-02-16 Daniele Senatore ADJUSTABLE TRANSPARENCY GLASSES
AU612614B2 (en) * 1987-02-12 1991-07-18 Bernard Rosen Welding helmet

Also Published As

Publication number Publication date
BR9205510A (en) 1994-04-26
EP0565684A1 (en) 1993-10-20
KR930702929A (en) 1993-11-29
JPH06504146A (en) 1994-05-12
DE69210010T2 (en) 1996-11-07
ATE136763T1 (en) 1996-05-15
ES2088599T3 (en) 1996-08-16
EP0565684B1 (en) 1996-04-17
AU2893292A (en) 1993-06-07
CA2098825A1 (en) 1993-05-06
WO1993008774A1 (en) 1993-05-13
DE69210010D1 (en) 1996-05-23
AU663897B2 (en) 1995-10-26

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