GB1457531A - Signs - Google Patents

Signs

Info

Publication number
GB1457531A
GB1457531A GB4470473A GB4470473A GB1457531A GB 1457531 A GB1457531 A GB 1457531A GB 4470473 A GB4470473 A GB 4470473A GB 4470473 A GB4470473 A GB 4470473A GB 1457531 A GB1457531 A GB 1457531A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
plates
gasket
panel
sept
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
GB4470473A
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.)
CLAUDGEN Ltd
Original Assignee
CLAUDGEN Ltd
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 CLAUDGEN Ltd filed Critical CLAUDGEN Ltd
Priority to GB4470473A priority Critical patent/GB1457531A/en
Publication of GB1457531A publication Critical patent/GB1457531A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

1457531 Controlling light CLAUDGEN Ltd 16 Sept 1974 [24 Sept 1973] 44704/73 Heading G2F [Also in Divisions G4 and G5] A sign consists of a display board bearing a design which may be rendered visible by reflected or transmitted light by the action of a light shutter comprising one or more liquid crystal panels parallel to and adjacent the board. Each panel consists of glass plates 1, 2 gold coated at 3, 4 and spaced by an electrically insulated peripheral gasket 7 and spacer discs 8, the space so formed being filled with a nematic liquid crystal 9. Plates 1, 2 are displaced to form overlaps 5, 6 exposing portions of the gold coatings for electrical connection by phosphor bronze strips 14 to opposed aluminium frame sections 10, 12 across which a voltage may be applied to control the liquid crystal 9. Frames 11 on the other two opposed sides are spaced at 13 from frames 10, 12. In manufacture of the panel, the plates and gasket are held in position by a temporary sealing strip on three sides, and liquid crystal material is injected into the fourth side, after which the plates are pressed together. The temporary seal is then replaced by a permanent epoxy resin seal 15. A heating current may be applied to one of the conductive plate surfaces to permit the liquid crystal to operate in cold weather. The plates may include spacing means in the form of a stencil integral with gasket 7 and forming a design. When more than one panel is used, the panels may be selectively actuated to reveal different parts of the display.
GB4470473A 1973-09-24 1973-09-24 Signs Expired GB1457531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4470473A GB1457531A (en) 1973-09-24 1973-09-24 Signs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4470473A GB1457531A (en) 1973-09-24 1973-09-24 Signs

Publications (1)

Publication Number Publication Date
GB1457531A true GB1457531A (en) 1976-12-01

Family

ID=10434404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4470473A Expired GB1457531A (en) 1973-09-24 1973-09-24 Signs

Country Status (1)

Country Link
GB (1) GB1457531A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113065A1 (en) * 1982-12-06 1984-07-11 Tektronix, Inc. Liquid crystal cell employing compression loading to achieve uniform interplate spacing, and method of construction thereof
EP0202067A2 (en) * 1985-05-06 1986-11-20 Raychem Corporation Flashing advisory sign
WO1991015800A1 (en) * 1990-04-04 1991-10-17 Makow David M An electro-optic cell for animated displays and indicators
US5153760A (en) * 1990-06-13 1992-10-06 Ahmed Adel A A Oscillating photovoltaic optical shutter for reflective display
FR2695504A1 (en) * 1992-09-04 1994-03-11 Berque Emmanuel Flashing signal panel e.g. for pedestrian or pelican crossings - uses electronic controller to vary translucency of screen to regulate external illumination falling on panel carrying graphics image or symbol
FR2783076A1 (en) * 1998-09-08 2000-03-10 Soc D Autoroutes De Sud De La SIGNALING DEVICE WITH A REFLECTOR AND A LIQUID CRYSTAL CELL
NO20141569A1 (en) * 2014-12-30 2016-02-15 Its Tellus As Two-position sign
EP2923235A4 (en) * 2012-11-21 2016-08-03 Nexeon Energy Solutions LLC Energy-efficient film

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113065A1 (en) * 1982-12-06 1984-07-11 Tektronix, Inc. Liquid crystal cell employing compression loading to achieve uniform interplate spacing, and method of construction thereof
EP0202067A2 (en) * 1985-05-06 1986-11-20 Raychem Corporation Flashing advisory sign
EP0202067A3 (en) * 1985-05-06 1989-03-08 Raychem Corporation Flashing advisory sign
US4893903A (en) * 1985-05-06 1990-01-16 Taliq Corporation Flashing advisory sign
WO1991015800A1 (en) * 1990-04-04 1991-10-17 Makow David M An electro-optic cell for animated displays and indicators
US5153760A (en) * 1990-06-13 1992-10-06 Ahmed Adel A A Oscillating photovoltaic optical shutter for reflective display
FR2695504A1 (en) * 1992-09-04 1994-03-11 Berque Emmanuel Flashing signal panel e.g. for pedestrian or pelican crossings - uses electronic controller to vary translucency of screen to regulate external illumination falling on panel carrying graphics image or symbol
FR2783076A1 (en) * 1998-09-08 2000-03-10 Soc D Autoroutes De Sud De La SIGNALING DEVICE WITH A REFLECTOR AND A LIQUID CRYSTAL CELL
EP0986042A1 (en) * 1998-09-08 2000-03-15 Société des Autoroutes du sud de la France Reflective display device with liquid crystal cell
EP2923235A4 (en) * 2012-11-21 2016-08-03 Nexeon Energy Solutions LLC Energy-efficient film
NO20141569A1 (en) * 2014-12-30 2016-02-15 Its Tellus As Two-position sign
NO337214B1 (en) * 2014-12-30 2016-02-15 Its Tellus As Two-position sign

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee