CA940217A - Rear projection screen employing liquid crystals - Google Patents

Rear projection screen employing liquid crystals

Info

Publication number
CA940217A
CA940217A CA112,955A CA112955A CA940217A CA 940217 A CA940217 A CA 940217A CA 112955 A CA112955 A CA 112955A CA 940217 A CA940217 A CA 940217A
Authority
CA
Canada
Prior art keywords
liquid crystals
projection screen
rear projection
employing liquid
screen employing
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
CA112,955A
Other versions
CA112955S (en
Inventor
James V. Cartmell
Donald Churchill
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.)
National Cash Register Co
Original Assignee
National Cash Register Co
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 National Cash Register Co filed Critical National Cash Register Co
Application granted granted Critical
Publication of CA940217A publication Critical patent/CA940217A/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
    • C09K19/48—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing Schiff bases
    • 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
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • 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
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/04—Charge transferring layer characterised by chemical composition, i.e. conductive
CA112,955A 1970-08-05 1971-05-13 Rear projection screen employing liquid crystals Expired CA940217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6113170A 1970-08-05 1970-08-05

Publications (1)

Publication Number Publication Date
CA940217A true CA940217A (en) 1974-01-15

Family

ID=22033792

Family Applications (1)

Application Number Title Priority Date Filing Date
CA112,955A Expired CA940217A (en) 1970-08-05 1971-05-13 Rear projection screen employing liquid crystals

Country Status (4)

Country Link
US (1) US3674338A (en)
CA (1) CA940217A (en)
FR (1) FR2103832A5 (en)
GB (1) GB1316213A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809456A (en) * 1972-04-10 1974-05-07 Optel Corp Liquid crystal device
US3844650A (en) * 1972-05-22 1974-10-29 Minnesota Mining & Mfg Projector
US3824008A (en) * 1972-07-28 1974-07-16 Eastman Kodak Co Method and apparatus for capture and retention of a transient image
US3833288A (en) * 1972-11-24 1974-09-03 B Nilsson Means for producing a controllable scattering of light
JPS503355A (en) * 1973-05-11 1975-01-14
US4083626A (en) * 1975-04-04 1978-04-11 Fuji Photo Film Co., Ltd. Rear projection screens
JPS5227636A (en) * 1975-08-27 1977-03-02 Olympus Optical Co Ltd Screen microscope
US4208115A (en) * 1975-11-03 1980-06-17 Rollei-Werke Franke & Heidecke Viewfinder system with focusing screen
US4497542A (en) * 1979-06-05 1985-02-05 Beckman Instruments, Inc. Apparatus for minimizing beam collimation sensitivity in optical instruments including liquid crystal cells
DE3140078A1 (en) * 1980-10-08 1982-04-22 Kabushiki Kaisha Suwa Seikosha, Tokyo OPTICAL LIQUID CRYSTAL DEVICE AND PRINTER USING SUCH AN OPTICAL DEVICE AS A LIGHT VALVE
EP0079894A1 (en) * 1981-01-08 1983-06-01 Securicard Systems Limited Identification of articles
US4518225A (en) * 1983-04-11 1985-05-21 Rockwell International Corporation Multicolored liquid crystal displays utilizing photoluminescent transflectors and mask
US4953971A (en) * 1988-10-17 1990-09-04 Highfill Robert R Interactive image projection apparatus
DE3903101A1 (en) * 1989-02-02 1990-08-09 Agfa Gevaert Ag SCREEN FOR PROJECTION COPIER
GB2235990A (en) * 1989-08-23 1991-03-20 Philips Electronic Associated Rear projection screens and projection systems incorporating such
US5040870A (en) * 1989-10-13 1991-08-20 Sumitomo Chemical Company, Limited Screen for projection
WO1998044382A1 (en) 1997-03-28 1998-10-08 Fergason James L Microencapsulated liquid crystal and a method and system for using same

Also Published As

Publication number Publication date
DE2138118B2 (en) 1973-10-31
DE2138118A1 (en) 1972-02-10
US3674338A (en) 1972-07-04
FR2103832A5 (en) 1972-04-14
GB1316213A (en) 1973-05-09

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