GB2122366B - Automatic liquid-crystal light shutter - Google Patents

Automatic liquid-crystal light shutter

Info

Publication number
GB2122366B
GB2122366B GB08216252A GB8216252A GB2122366B GB 2122366 B GB2122366 B GB 2122366B GB 08216252 A GB08216252 A GB 08216252A GB 8216252 A GB8216252 A GB 8216252A GB 2122366 B GB2122366 B GB 2122366B
Authority
GB
United Kingdom
Prior art keywords
crystal light
automatic liquid
light shutter
shutter
automatic
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.)
Expired
Application number
GB08216252A
Other versions
GB2122366A (en
Inventor
Hsieh Tong-Shen
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.)
TONG SHEN HSIEH
Original Assignee
TONG SHEN HSIEH
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 TONG SHEN HSIEH filed Critical TONG SHEN HSIEH
Priority to GB08216252A priority Critical patent/GB2122366B/en
Publication of GB2122366A publication Critical patent/GB2122366A/en
Application granted granted Critical
Publication of GB2122366B publication Critical patent/GB2122366B/en
Expired 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
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G02F1/13318—Circuits comprising a photodetector
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Liquid Crystal (AREA)
GB08216252A 1982-06-03 1982-06-03 Automatic liquid-crystal light shutter Expired GB2122366B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08216252A GB2122366B (en) 1982-06-03 1982-06-03 Automatic liquid-crystal light shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08216252A GB2122366B (en) 1982-06-03 1982-06-03 Automatic liquid-crystal light shutter

Publications (2)

Publication Number Publication Date
GB2122366A GB2122366A (en) 1984-01-11
GB2122366B true GB2122366B (en) 1985-11-27

Family

ID=10530832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08216252A Expired GB2122366B (en) 1982-06-03 1982-06-03 Automatic liquid-crystal light shutter

Country Status (1)

Country Link
GB (1) GB2122366B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6159301A (en) * 1984-08-30 1986-03-26 Nippon Denso Co Ltd Nonglaring type reflecting mirror controller
GB2233468A (en) * 1989-06-24 1991-01-09 Martin Spence Wilson Electronic reduction of glare
US5161875A (en) * 1989-11-28 1992-11-10 Stanley Electric Company, Ltd. Head lamp for cornering operation
DE4128291A1 (en) * 1991-08-27 1993-03-04 Optrel Ag Light protection filter esp. for welding helmet or protective goggles or shield - has filter element electrically controllable related to its optical transmission which works in conjunction with transmission control unit
EP0536081A1 (en) * 1991-08-27 1993-04-07 Optrel Ag Light protection filter with filtering element having electrically ajustable transmission
TW390808B (en) * 1997-06-18 2000-05-21 Optrel Ag Optoelektronik Active electrooptic filter device
FR2912230B1 (en) * 2007-02-02 2009-04-03 Ensmse ELECTRO-OPTICAL SHUT-OFF DEVICE FOR ANTI-GLOWING SYSTEM BASED ON AT LEAST ONE PHOTOSENSITIVE LAYER

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027518A1 (en) * 1979-09-06 1981-04-29 Gor-Vue Corporation Lens assembly for a welding helmet for use in sunlight conditions and in a welding helmet the combination of a circuit including a photodetector
US4279474A (en) * 1980-03-25 1981-07-21 Belgorod Barry M Spectacle lens having continuously variable controlled density and fast response time

Also Published As

Publication number Publication date
GB2122366A (en) 1984-01-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee