EP0394340A1 - Rear projection system - Google Patents
Rear projection systemInfo
- 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
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.A projection screen arrangement (1) for displaying a projected image comprises a number of elongated lamellar elements (2) which are arranged at a certain reciprocal distance (a) in a common screen plane. Relative to their plane of vision, the lamellar elements (2) form an angle a with the common screen plane. The lamellar elements are arranged vertically and can rotate around a vertical axis between 0 ° and 180 °. In an embodiment intended for rear projection, the lamellar elements (2) are made from a non-transparent translucent material. The lamellar elements (2) are provided with a common adjustment member (9, 10) which can be controlled remotely.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO880150 | 1988-01-14 | ||
NO880150A NO164323C (en) | 1988-01-14 | 1988-01-14 | IMAGE SCREEN DEVICE. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0394340A1 true EP0394340A1 (en) | 1990-10-31 |
Family
ID=19890561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890901322 Ceased EP0394340A1 (en) | 1988-01-14 | 1989-01-13 | Rear projection system |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0394340A1 (en) |
JP (1) | JPH03503939A (en) |
AU (1) | AU2912489A (en) |
NO (1) | NO164323C (en) |
WO (1) | WO1989006825A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5892278B1 (en) | 2015-03-18 | 2016-03-23 | 株式会社安川電機 | Screen device, image display system, and image display method |
Family Cites Families (3)
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 |
-
1988
- 1988-01-14 NO NO880150A patent/NO164323C/en unknown
-
1989
- 1989-01-13 JP JP50106489A patent/JPH03503939A/en active Pending
- 1989-01-13 AU AU29124/89A patent/AU2912489A/en not_active Abandoned
- 1989-01-13 EP EP19890901322 patent/EP0394340A1/en not_active Ceased
- 1989-01-13 WO PCT/NO1989/000007 patent/WO1989006825A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8906825A1 * |
Also Published As
Publication number | Publication date |
---|---|
NO880150L (en) | 1989-07-17 |
NO164323B (en) | 1990-06-11 |
NO164323C (en) | 1990-09-19 |
WO1989006825A1 (en) | 1989-07-27 |
NO880150D0 (en) | 1988-01-14 |
JPH03503939A (en) | 1991-08-29 |
AU2912489A (en) | 1989-08-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19900709 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19920817 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19931225 |