GB1353396A - Imaging system - Google Patents

Imaging system

Info

Publication number
GB1353396A
GB1353396A GB2893771A GB2893771A GB1353396A GB 1353396 A GB1353396 A GB 1353396A GB 2893771 A GB2893771 A GB 2893771A GB 2893771 A GB2893771 A GB 2893771A GB 1353396 A GB1353396 A GB 1353396A
Authority
GB
United Kingdom
Prior art keywords
image
electric field
june
liquid crystal
transition temperature
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
GB2893771A
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 GB1353396A publication Critical patent/GB1353396A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
    • C09K19/50—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing steroidal liquid crystal compounds
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13731—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition

Landscapes

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

Abstract

1353396 Modulating light XEROX CORP 21 June 1971 [19 June 1970] 28937/71 Heading H4F [Also in Divisions G2 and G4-G6] The relaxation characteristics of an imaged cholesteric liquid crystal layer are modified by the application of a uniform holding electric field across the imaged layer and of a strength insufficient of itself to maintain the image. The liquid crystal material may be in the cholestericnematic phase transition temperature range producing a transparent image (dark through polarizers) on a milky white background or in the Grandjean to focal-conic texture change transition temperature range producing a white image on a coloured background. One or both field-producing electrodes may be transparent for viewing the image by reflected or transmitted light respectively. The image may be formed using an X-Y address system, electron beam address electric stylus or photoconductive member. The holding electric field may be maintained during application of an imaging electric field and subsequent pulsed uniform or imagewise electric fields of imaging strength (but not duration) to produce an image of constant brightness; by this means, an image may be built up using the X-Y address system.
GB2893771A 1970-06-19 1971-06-21 Imaging system Expired GB1353396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4769870A 1970-06-19 1970-06-19

Publications (1)

Publication Number Publication Date
GB1353396A true GB1353396A (en) 1974-05-15

Family

ID=21950439

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2893771A Expired GB1353396A (en) 1970-06-19 1971-06-21 Imaging system

Country Status (3)

Country Link
CA (1) CA931250A (en)
DE (1) DE2130504C3 (en)
GB (1) GB1353396A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738162C2 (en) * 1976-08-25 1983-01-13 Sharp K.K., Osaka Liquid crystal display device
CH617281A5 (en) * 1977-07-29 1980-05-14 Bbc Brown Boveri & Cie
CA1241419A (en) * 1983-08-26 1988-08-30 Paul Milgram Apparatus for influencing the presentation of visual information
JPS61198270A (en) * 1985-02-28 1986-09-02 富士通株式会社 Projection type liquid crystal display unit and method and application thereof

Also Published As

Publication number Publication date
DE2130504A1 (en) 1971-12-23
DE2130504C3 (en) 1979-02-08
DE2130504B2 (en) 1978-06-08
CA931250A (en) 1973-07-31

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee