DE3784661T2 - Fluessigkristall-spannungsmessgeraet. - Google Patents

Fluessigkristall-spannungsmessgeraet.

Info

Publication number
DE3784661T2
DE3784661T2 DE8787311045T DE3784661T DE3784661T2 DE 3784661 T2 DE3784661 T2 DE 3784661T2 DE 8787311045 T DE8787311045 T DE 8787311045T DE 3784661 T DE3784661 T DE 3784661T DE 3784661 T2 DE3784661 T2 DE 3784661T2
Authority
DE
Germany
Prior art keywords
liquid crystal
measuring device
voltage measuring
crystal voltage
liquid
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 - Fee Related
Application number
DE8787311045T
Other languages
English (en)
Other versions
DE3784661D1 (de
Inventor
Werner Erwin Louis Haas
John Richard Andrews
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of DE3784661D1 publication Critical patent/DE3784661D1/de
Application granted granted Critical
Publication of DE3784661T2 publication Critical patent/DE3784661T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
    • G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/12—Measuring electrostatic fields or voltage-potential

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Crystal (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
DE8787311045T 1986-12-18 1987-12-15 Fluessigkristall-spannungsmessgeraet. Expired - Fee Related DE3784661T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/943,236 US4786858A (en) 1986-12-18 1986-12-18 Liquid crystal electrostatic voltmeter

Publications (2)

Publication Number Publication Date
DE3784661D1 DE3784661D1 (de) 1993-04-15
DE3784661T2 true DE3784661T2 (de) 1993-07-15

Family

ID=25479288

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787311045T Expired - Fee Related DE3784661T2 (de) 1986-12-18 1987-12-15 Fluessigkristall-spannungsmessgeraet.

Country Status (4)

Country Link
US (1) US4786858A (de)
EP (1) EP0272871B1 (de)
JP (1) JPH067142B2 (de)
DE (1) DE3784661T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4926043A (en) * 1987-03-31 1990-05-15 Siemens Aktiengesellschaft Apparatus and method for optical measuring and imaging of electrical potentials
JPH0194270A (ja) * 1987-10-06 1989-04-12 Murata Mfg Co Ltd 表面電位検出装置
US5064277A (en) * 1991-01-28 1991-11-12 Eastman Kodak Company Operation of a light modulator of the planar electrode type
JP4684688B2 (ja) * 2005-03-14 2011-05-18 株式会社リコー シート部材の放電ムラ観察装置および観察方法並びに抵抗測定装置および測定方法
JP5276810B2 (ja) * 2007-08-09 2013-08-28 本田技研工業株式会社 燃料電池の電圧検出装置
US7924018B2 (en) * 2008-12-19 2011-04-12 Illinois Tool Works Inc. MEMS electrometer that measures amount of repulsion of adjacent beams from each other for static field detection
US7915897B2 (en) * 2008-12-19 2011-03-29 Illinois Tool Works Inc. Foil-leaf electrometer for static field detection with permanently separating leaves
US7940040B2 (en) * 2008-12-19 2011-05-10 Illinois Tool Works Inc. Foil-leaf electrometer for static field detection with triggered indicator
US8213816B2 (en) * 2009-08-27 2012-07-03 Xerox Corporation Method and system for banding compensation using electrostatic voltmeter based sensing
US8611769B2 (en) 2011-11-22 2013-12-17 Xerox Corporation Method and system for troubleshooting charging and photoreceptor failure modes associated with a xerographic process
WO2013110141A1 (en) * 2012-01-25 2013-08-01 Newsouth Innovations Pty Ltd Optically based voltage sensing device and method

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627408A (en) * 1965-06-29 1971-12-14 Westinghouse Electric Corp Electric field device
US3938878A (en) * 1970-01-09 1976-02-17 U.S. Philips Corporation Light modulator
IT985834B (it) * 1973-05-03 1974-12-20 Fiat Spa Schermo a trasparenza variabile
US3936815A (en) * 1973-08-06 1976-02-03 Nippon Telegraph And Telephone Public Corporation Apparatus and method for writing storable images into a matrix-addressed image-storing liquid crystal display device
DE2341073B2 (de) * 1973-08-10 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Meßeinrichtung für die Spannung in einer gekapselten Hochspannungsschaltanlage
US3934199A (en) * 1974-03-28 1976-01-20 Rca Corporation Method of testing an electrical circuit
US4112361A (en) * 1975-06-05 1978-09-05 Tokyo Seimitsu Co. Ltd. Liquid crystal applied voltmeter
US4029393A (en) * 1976-04-29 1977-06-14 General Motors Corporation Integrated thermally compensated liquid crystal display device
US4100484A (en) * 1976-11-26 1978-07-11 Xerox Corporation D.C. Electrometer
DE2724343A1 (de) * 1977-05-28 1978-12-07 Battelle Institut E V Messgeraet fuer elektrische spannungen
GB2049205B (en) * 1979-05-17 1983-11-30 Medine H Electric potential detector
US4277146A (en) * 1979-07-19 1981-07-07 The United States Of America As Represented By The Secretary Of The Army Visible and infrared intensity limiter
NL181528C (nl) * 1980-01-12 1987-09-01 Sumitomo Electric Industries Inrichting voor het meten van een spanning of van een elektrisch veld met gebruikmaking van licht.
US4279474A (en) * 1980-03-25 1981-07-21 Belgorod Barry M Spectacle lens having continuously variable controlled density and fast response time
US4396997A (en) * 1981-05-26 1983-08-02 Hewlett-Packard Company Liquid crystal information storage and retrieval system
US4423927A (en) * 1981-09-22 1984-01-03 The United States Of America As Represented By The Secretary Of The Army Optical, temporal bandpass filter
US4446425A (en) * 1982-02-12 1984-05-01 The University Of Rochester Measurement of electrical signals with picosecond resolution
DE3379078D1 (en) * 1982-10-20 1989-03-02 Secr Defence Brit Liquid crystal mirror displays
IT1172826B (it) * 1983-04-20 1987-06-18 Consiglio Nazionale Ricerche Dispositivo a cristalli liquidi per la rotazione continua della polarizzazione selettiva di luce monocromatica
US4643525A (en) * 1984-12-24 1987-02-17 General Electric Co. Transflective liquid crystal display with integral heating unit
GB8519230D0 (en) * 1985-07-31 1985-09-04 Dunning G E Liquid crystal displays

Also Published As

Publication number Publication date
DE3784661D1 (de) 1993-04-15
EP0272871B1 (de) 1993-03-10
EP0272871A2 (de) 1988-06-29
JPS63167279A (ja) 1988-07-11
JPH067142B2 (ja) 1994-01-26
EP0272871A3 (en) 1988-07-27
US4786858A (en) 1988-11-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee