EP0394340A1 - Système de rétroprojection - Google Patents

Système de rétroprojection

Info

Publication number
EP0394340A1
EP0394340A1 EP19890901322 EP89901322A EP0394340A1 EP 0394340 A1 EP0394340 A1 EP 0394340A1 EP 19890901322 EP19890901322 EP 19890901322 EP 89901322 A EP89901322 A EP 89901322A EP 0394340 A1 EP0394340 A1 EP 0394340A1
Authority
EP
European Patent Office
Prior art keywords
arrangement
plane
screen
lamella members
common
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.)
Ceased
Application number
EP19890901322
Other languages
German (de)
English (en)
Inventor
Tore Lyngholm
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
Publication of EP0394340A1 publication Critical patent/EP0394340A1/fr
Ceased 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • 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
    • G03B2227/00—Photographic printing apparatus
    • G03B2227/32—Projection printing apparatus, e.g. enlarging apparatus, copying camera
    • G03B2227/325—Microcapsule copiers

Definitions

  • the present invention relates to an arrangement of a project ⁇ ion screen for displaying a projected image.
  • the invention is mainly intended to be used for advertising or demonstration purposes, and it is intended for displaying stills and moving images.
  • an object of the present invention to provide a projection screen covering the entire, or an essential part of the window area, at the same time as it permits a view of the display behind said screen.
  • a projection screen which is characterized by the fact that the screen comprises a number of elongated lamella members of a dull translucent material, which are provided at a mutual distance in a common screen plane and with their own plane (the viewed surface) enclose an angle with the common screen plane.
  • the lamella members are arrang ⁇ ed at such a mutual distance, and at such an angle that their projection on the common plane covers the whole plane.
  • FIG. 1 is a perspective view of a screen according to the invention with lamelle 45 tilted position on the main plane of the screen
  • Figure 2 shows a detail of the lamella suspension
  • Figure 3 is a diagrammatical view of a back projected screen according to the invention, seen from above.
  • Projecting screen 1 in Figure 1 comprises a number of lamelle 2, which are arranged at a mutual distance a.
  • Lamelle 2 are provided with their longitudinal axes 3 in a common vertical plane.
  • the lamella members are turnable about their axes 3, and
  • Figure 2 shows an embodiment of a turnable suspension of a lamella.
  • the lamella member in Figure 2 is provided with a bent back lug 4 at its upper end.
  • a pin 5 extends through an aperture 6 at upper external flap 4 1 of lug 4 and a head 6 is in contact with the lower side of flap 4 1 to hold lamella 2.
  • Pin 5 is attached to a slide member 7 which is slidably arranged in a slide rail 8 which may, e.g.
  • the angle of lamella members 2 is adjustable by the aid of a common adjustment means which in a simple embodiment, as shown in Figure 1, may comprise two cords 9 and 10 which are secured at the lower corners of each lamella 2.
  • Cords 9 and 10 are movable in the direction of arrows 11 and 12 by the aid of a common member, not shown.
  • Lamella members 2 are manufactured from an opaque material, i.e. they are translucent, but not transparent. An image will, thus, appear on the screen, which may be viewed by an observer on the opposite side of the screen, as diagrammatically indicated by an eye 14, when the observ ⁇ er stands at a certain distance from the screen looking straight at the screen. If the observer moves close to the window where screen 1 is suspended, he may view a display 15 by looking in the direction of arrows 16 between lamella members 2.
  • the screen may readily be removed from the window, since lamella members 2 can slide, via slides 7, to one side along slide rail 8.
  • the screen By the aid of the screen according to the invention, it is, thus, possible to show advertising images and films, instructive films, and the like, at the same time as people can view a window display.
  • the screen may also serve as a common sun shade. It will then be especially suitable that lamella members 2 can be placed at a desired angle to provide optimal view at the same time as sufficient sun shading is achieved.

Abstract

Un agencement pour écran de projection (1) destiné à afficher une image projetée comprend un certain nombre d'éléments lamellaires allongés (2) qui sont disposés à une certaine distance réciproque (a) dans un plan d'écran commun. Par rapport à leur plan de vision, les éléments lamellaires (2) forment un angle a avec le plan d'écran commun. Les éléments lamellaires sont agencés verticalement et peuvent effectuer autour d'un axe vertical une rotation comprise entre 0° et 180°. Dans un mode de réalisation destiné à la rétroprojection, les éléments lamellaires (2) sont fabriqués à partir d'un matériau translucide non transparent. Les éléments lamellaires (2) sont pourvus d'un organe de réglage commun (9, 10) qui peut être commandé à distance.
EP19890901322 1988-01-14 1989-01-13 Système de rétroprojection Ceased EP0394340A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO880150A NO164323C (no) 1988-01-14 1988-01-14 Anordning ved billedskjerm.
NO880150 1988-01-14

Publications (1)

Publication Number Publication Date
EP0394340A1 true EP0394340A1 (fr) 1990-10-31

Family

ID=19890561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890901322 Ceased EP0394340A1 (fr) 1988-01-14 1989-01-13 Système de rétroprojection

Country Status (5)

Country Link
EP (1) EP0394340A1 (fr)
JP (1) JPH03503939A (fr)
AU (1) AU2912489A (fr)
NO (1) NO164323C (fr)
WO (1) WO1989006825A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5892278B1 (ja) 2015-03-18 2016-03-23 株式会社安川電機 スクリーン装置、画像表示システム、画像表示方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1791573A (en) * 1926-11-18 1931-02-10 Parolini Cesar Device for making luminous projections in broad daylight or in a lighted room
US1671126A (en) * 1927-01-14 1928-05-29 William G Reeder Change-sign apparatus
US3463569A (en) * 1965-10-22 1969-08-26 Freen Ltd Rear projection screen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8906825A1 *

Also Published As

Publication number Publication date
AU2912489A (en) 1989-08-11
WO1989006825A1 (fr) 1989-07-27
NO880150L (no) 1989-07-17
NO164323B (no) 1990-06-11
JPH03503939A (ja) 1991-08-29
NO164323C (no) 1990-09-19
NO880150D0 (no) 1988-01-14

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Legal Events

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