GB1377805A - Optical indicating apparatus - Google Patents

Optical indicating apparatus

Info

Publication number
GB1377805A
GB1377805A GB683472A GB683472A GB1377805A GB 1377805 A GB1377805 A GB 1377805A GB 683472 A GB683472 A GB 683472A GB 683472 A GB683472 A GB 683472A GB 1377805 A GB1377805 A GB 1377805A
Authority
GB
United Kingdom
Prior art keywords
potential
voltage
liquid crystal
gradient
unknown voltage
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
GB683472A
Other languages
English (en)
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.)
BBC BROWN BOVERI and CIE
BBC Brown Boveri AG Switzerland
Original Assignee
BBC BROWN BOVERI and CIE
BBC Brown Boveri AG Switzerland
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 BBC BROWN BOVERI and CIE, BBC Brown Boveri AG Switzerland filed Critical BBC BROWN BOVERI and CIE
Publication of GB1377805A publication Critical patent/GB1377805A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
    • G01R13/401—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for continuous analogue, or simulated analogue, display
    • G01R13/403—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for continuous analogue, or simulated analogue, display using passive display devices, e.g. liquid crystal display or Kerr effect display devices
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing
    • H03M1/1009—Calibration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Geometry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
GB683472A 1971-02-15 1972-02-14 Optical indicating apparatus Expired GB1377805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH223071A CH527427A (de) 1971-02-15 1971-02-15 Anordnung zur lokalen Änderung der optischen Eigenschaften einer Anzeigeschrift mittels einer Steuerspannung

Publications (1)

Publication Number Publication Date
GB1377805A true GB1377805A (en) 1974-12-18

Family

ID=4228904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB683472A Expired GB1377805A (en) 1971-02-15 1972-02-14 Optical indicating apparatus

Country Status (6)

Country Link
US (1) US3774195A (enExample)
CH (1) CH527427A (enExample)
DE (1) DE2112282A1 (enExample)
FR (1) FR2125893A5 (enExample)
GB (1) GB1377805A (enExample)
NL (1) NL7201864A (enExample)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944330A (en) * 1972-09-22 1976-03-16 Dainippon Printing Co., Ltd. Electro-optic device
US3838394A (en) * 1973-09-04 1974-09-24 D Sandoval Transmission system
US4035060A (en) * 1973-09-21 1977-07-12 Dainippon Printing Co., Ltd Electro-optic device
US3979743A (en) * 1974-02-20 1976-09-07 The Rank Organisation Limited Displays
US3959791A (en) * 1974-04-04 1976-05-25 Yashica Co., Ltd. Digital display systems
NL7406729A (nl) * 1974-05-20 1975-11-24 Philips Nv Inrichting voor het aansturen of bekrachtigen van een weergeefinrichting.
US4139278A (en) * 1975-07-31 1979-02-13 Canon Kabushiki Kaisha Liquid crystal display device
US4516835A (en) * 1976-02-17 1985-05-14 Canon Kabushiki Kaisha Liquid crystal display system
US4365868A (en) * 1977-06-29 1982-12-28 Eaton Corporation Liquid crystal device for direct display of analog information
US4193669A (en) * 1977-06-29 1980-03-18 Crystaloid Electronics Company Liquid crystal device for direct display of analog information
DE2849221C2 (de) * 1978-11-13 1983-01-27 Günter Dipl.-Phys. 3303 Vechelde Kramer Anzeigeeinrichtung mit Flüssigkristallelementen
JPS57110928A (en) * 1980-12-27 1982-07-10 Sharp Corp Thermometer
EP0205235A3 (en) * 1985-04-11 1988-09-21 Control Interface Corporation Method and apparatus for liquid crystal display of analog indicators
US4823078A (en) * 1987-11-16 1989-04-18 Raychem Corporation Device for A.C. voltage testing using a voltage multiplier and LCD display
US5070301A (en) * 1989-11-08 1991-12-03 Schweitzer Edmund O Jun Fault indicator having liquid crystal status display
US5095265A (en) * 1989-11-08 1992-03-10 Schweitzer Edmund O Jun Circuit status indicator having liquid crystal display
US5105156A (en) * 1990-02-28 1992-04-14 Display Matrix Corporation Method and apparatus for indicating state of charge of a battery
US5077520A (en) * 1990-05-15 1991-12-31 Schweitzer Edmund O Jun High impedance voltage indicator having capacitive voltage divider
US5363088A (en) * 1992-12-21 1994-11-08 Schweitzer Edmund O Jun Voltage monitor for alternating current power system
US5406195A (en) * 1992-12-21 1995-04-11 Schweitzer, Jr.; Edmund O. Phase-to-phase voltage monitor for three-phase power distribution system
WO1994027336A1 (en) * 1993-05-07 1994-11-24 Brasscorp Limited Temperature responsive battery tester
WO2005073790A1 (en) * 2004-01-26 2005-08-11 Koninklijke Philips Electronics N.V. Liquid crystal display device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322485A (en) * 1962-11-09 1967-05-30 Rca Corp Electro-optical elements utilizing an organic nematic compound
US3517258A (en) * 1966-10-31 1970-06-23 Ibm Solid state display device using light emitting diodes
US3667039A (en) * 1970-06-17 1972-05-30 Nasa Electricity measurement devices employing liquid crystalline materials

Also Published As

Publication number Publication date
FR2125893A5 (enExample) 1972-09-29
US3774195A (en) 1973-11-20
CH527427A (de) 1972-08-31
NL7201864A (enExample) 1972-08-17
DE2112282A1 (de) 1972-08-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee