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JPS57210322A - Liquid crystal optical device - Google Patents

Liquid crystal optical device

Info

Publication number
JPS57210322A
JPS57210322A JP56095091A JP9509181A JPS57210322A JP S57210322 A JPS57210322 A JP S57210322A JP 56095091 A JP56095091 A JP 56095091A JP 9509181 A JP9509181 A JP 9509181A JP S57210322 A JPS57210322 A JP S57210322A
Authority
JP
Japan
Prior art keywords
liquid crystal
frequency
optical device
voltage
crystal composition
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.)
Granted
Application number
JP56095091A
Other languages
Japanese (ja)
Other versions
JPS6344207B2 (en
Inventor
Haruo Nakamura
Kenji Aoki
Mitsuo Nagata
Teiji Miura
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP56095091A priority Critical patent/JPS57210322A/en
Priority to DE19813140078 priority patent/DE3140078A1/en
Publication of JPS57210322A publication Critical patent/JPS57210322A/en
Priority to US06/742,651 priority patent/US4927242A/en
Priority to US07/136,426 priority patent/US4810062A/en
Publication of JPS6344207B2 publication Critical patent/JPS6344207B2/ja
Granted 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Facsimile Heads (AREA)

Abstract

PURPOSE:To obtain a liquid crystal optical device having high speed responsiveness, by using a liquid crystal composition in which an optically active substance is added to nematic liquid crystal generating dielectric relaxation in a long axial direction of liquid crystal molecule and driving by using the specific high and low two kinds of frequencies of voltage. CONSTITUTION:An optically active nematic liquid crystal composition having <=100kHz cross frequency fc at normal temp. whose dielectric anisotropy becomes zero is sealed in between substrates 1, 1 on which transparent electrodes 2 are provided respectively. Liquid crystal molecule is disposed to be parallel on the surfaces of substrates and is subjected to an orientation treatment so that the upper substrate surface crosses at a right angle to the lower substrate surface. Polarizing plates 6.7 are disposed so that the polarizing directions cross at right angles respectively. The thickness of a liquid crystal layer (d) is regulated within three times as much as a spiral pitch of the liquid crystal composition. A driving circuit converting voltage fh having a frequency larger than the frequency fc and voltage fe having a frequency smaller than fc and applying, is provided. By this way, a liquid crystal optical device suitable for light valve etc. which are able to make and break at the high speed more than several ten times as high as the usual products.
JP56095091A 1980-10-08 1981-06-19 Liquid crystal optical device Granted JPS57210322A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56095091A JPS57210322A (en) 1981-06-19 1981-06-19 Liquid crystal optical device
DE19813140078 DE3140078A1 (en) 1980-10-08 1981-10-08 OPTICAL LIQUID CRYSTAL DEVICE AND PRINTER USING SUCH AN OPTICAL DEVICE AS A LIGHT VALVE
US06/742,651 US4927242A (en) 1980-10-08 1985-06-10 Dual frequency, optically active liquid crystal cell
US07/136,426 US4810062A (en) 1980-10-08 1987-12-16 Liquid crystal cell with opaque mask for printing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095091A JPS57210322A (en) 1981-06-19 1981-06-19 Liquid crystal optical device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP60291222A Division JPS61172122A (en) 1985-12-24 1985-12-24 liquid crystal optical device

Publications (2)

Publication Number Publication Date
JPS57210322A true JPS57210322A (en) 1982-12-23
JPS6344207B2 JPS6344207B2 (en) 1988-09-02

Family

ID=14128236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095091A Granted JPS57210322A (en) 1980-10-08 1981-06-19 Liquid crystal optical device

Country Status (1)

Country Link
JP (1) JPS57210322A (en)

Also Published As

Publication number Publication date
JPS6344207B2 (en) 1988-09-02

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