GB413572A - Improvements in or relating to screens for the reception of optically projected images - Google Patents

Improvements in or relating to screens for the reception of optically projected images

Info

Publication number
GB413572A
GB413572A GB3566333A GB3566333A GB413572A GB 413572 A GB413572 A GB 413572A GB 3566333 A GB3566333 A GB 3566333A GB 3566333 A GB3566333 A GB 3566333A GB 413572 A GB413572 A GB 413572A
Authority
GB
United Kingdom
Prior art keywords
elements
coloured
screens
colours
relating
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
GB3566333A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3566333A priority Critical patent/GB413572A/en
Publication of GB413572A publication Critical patent/GB413572A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03B21/567—Projection screens for colour projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)

Abstract

413,572. Projection screens. ANDERSEN, A. C., 50, Set. Knudsvej, Copenhagen. Dec. 19, 1933, No. 35663. Drawings to Specification. [Class 97 (i).] The surface of a projection screen is divided into differently coloured elements of uniform size, shape, and arrangement, the elements being so small as not to be individually distinguishable from the normal position of a spectator. The colours may be printed on a white paper base, or the screen may be woven with coloured threads. The elements may be alternately arranged red and green squares, red, blue, and yellow hexagons, or other coloured polygons. Their colours may be complementary or such as to produce a slight preponderance of one colour. The elements may be separated by dark lines, and perforations for sound transmission may be provided in the separating lines.
GB3566333A 1933-12-19 1933-12-19 Improvements in or relating to screens for the reception of optically projected images Expired GB413572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3566333A GB413572A (en) 1933-12-19 1933-12-19 Improvements in or relating to screens for the reception of optically projected images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3566333A GB413572A (en) 1933-12-19 1933-12-19 Improvements in or relating to screens for the reception of optically projected images

Publications (1)

Publication Number Publication Date
GB413572A true GB413572A (en) 1934-07-19

Family

ID=10380201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3566333A Expired GB413572A (en) 1933-12-19 1933-12-19 Improvements in or relating to screens for the reception of optically projected images

Country Status (1)

Country Link
GB (1) GB413572A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421809A2 (en) * 1989-10-05 1991-04-10 THORN EMI plc A screen and projector for use in a front projection system
WO2002048790A1 (en) * 2000-12-11 2002-06-20 Seppo Lappalainen Projection surface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421809A2 (en) * 1989-10-05 1991-04-10 THORN EMI plc A screen and projector for use in a front projection system
EP0421809A3 (en) * 1989-10-05 1992-04-08 Thorn Emi Plc A screen and projector for use in a front projection system
US5193015A (en) * 1989-10-05 1993-03-09 Thorn Emi Plc Cholesteric liquid crystal screen which reflects substantially all of the projected light
WO2002048790A1 (en) * 2000-12-11 2002-06-20 Seppo Lappalainen Projection surface
US6980361B2 (en) 2000-12-11 2005-12-27 Seppo Lappalainen Projection surface

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