CA2020913A1

CA2020913A1 - Arrangement of a projection screen

Info

Publication number: CA2020913A1
Application number: CA 2020913
Authority: CA
Inventors: Tore Lyngholm
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-11
Filing date: 1990-07-11
Publication date: 1992-01-12

Abstract

AN ARRANGEMENT OF A PROJECTION
SCREEN

Abstract An arrangement of a projection screen (1) for displaying a projected image comprises a number of elongated lamella members (2) which are provid-ed at a mutual distance (a) in a common screen plane. With their view-ing plane lamella members (2) form an angle (.alpha.) with the common screen plane.
The lamella members are vertically arranged and are turnable about a vertical axis from 0° to 180°.

In an embodiment intended for back projection lamella members (2) are manufactured from a translucent, non-transparent material. Lamella members (2) are provided with a common adjust-ment means (9,10) which may be remote controlled.

(Figure 1)

Description

AN ARRANGEMENT OF A PROJECT~ON SCREEN

The prese~t invention relates to an arrangement of a project-i~n screen for dîsplaying a projected image.

~e inven~ion is mainly intended to ~e used ~or advertising or demo~stration p~rpose~, a~d it is intended for displaying stills and moving ima~es.

In connection with show windows it may be qesired, at the same ti~e, to be able to show advertising images, advertiS-ing ~ilms, demon~tration fi7ms, and the like. Previou~ly, ~his was done by the aid of TV-screens and a video player. ~ -A TV-screen, however, cannot be watched ~rom a distance, and i~ will not act as an eye catcher ~o people at a ce~tain distance ~rom the window.

It is, thus, an obiect of the present invention to provi~e a projection screen covering the entire, or an essential p~rt of the window area, at the same time as it permits a view of the display behind said screen.
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According to the invention this is achieved by an arrangement o~ a proiection screen which is characteri~ed by the fa~t that 25 the screen comprises a number of elong~ted la~ella me~bers of a d~ll translucent material, which are p~ovi~ed ~t a ~utual d~stance in a common screen pl~ne and with their own plane (~he viewed sur~ac~) enclose an ang7e with the common screen plane. In a preferred embodiment the lamella me~bers are arrang-30 ed~at such a mu~ual distance, and at 6uch an angle that theirpro~je~tion on the common plane covers ~he whole plane.

~urth¢r features Of t}7e invention will appear ~rom the dep~ndent claims from 3 to 9 The inv~ntion wil~ be disclosed in more det~il below with re~rence to the drawing, which shows ~ diagra~matical embodiment of a ~creen ac~ording to the invention, and where . . .
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~ .3 : 2 - ~ Figure l is a ~erspective view of a screen according to the . invention with lamelle 45 til~ed position on the main pla~e of the screen, Fi~ure ~ shows a detail of the lamella suspension, and Fig~re 3 is a dia~rammatic~l view of a back ~rojected scre¢n a~cording to the inven~ion, seen from above.

Projecting screen l in Fig~re l compris~s a num~er of ~lamelle 2, whi~h are arran~ed a~ a mutual dis~ance a~
0 ~amelle 2 are provided with their lon~itudinal axes 3 in a common vertical plane. The lamella members are turnable : ~ about their axes 3, and ~igure 2 shows a~ embodiment of a ~:~turnable suspension of a 1amella. The lamella member in Figure 2 is provi~ed with a bent back lug 4 at its upper end. A pin 5 extends through an apertu~e 6 at upper çxternal .lap ~' of lug 4 and a head 6 is in contact with the lower -: side of flap 4 ' to hold lameIla 2. Pin 5 i5 atta~hed to a ~ :
s~i~e member 7 which is slida~ly arranged in a slide rail 8 ~.which may, e.g. be attached to upper ~rame portion of a .window ~rame in a displa~ window. The angle of lamella members 2 is adjustable by the aid of a co~mon adjustment 1:
.means which in a simple embodiment, as shown in Fi~ure l, ..
~ay comprise two cords g and lO which are secured at the lower ~orners of each lamella 2. Cords 9 and lO are ~ovable : :
~5 i~ the direction o~ arrows l~ and 12 by the aid o~ a .common member, not shown.
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~: In ~igure 3 ~ back p~ojected screen l according to the in-vention is diagrammatically shown with light from a .projector of ~il~s or images ~eing illustrated~ by arrows .l3. ~amella mem~ers 2 are manufactured fro~ an opaque material, i.e. they are translucent, but not transparent.
~n image will, thus, appear on ~he screen, which may be ~iewed by an observer on the opposite side of the screen as diagrammatically indicatc-d by an eye 14, ~hen the obsérv-er stands a~ a certain distance from the screen looking :~ straight at ~he screen. If the o~server moves close to the _ window where screen l is suspended, he may view a display lS
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_ ~ ~y looking in the direction of arrows 16 between lamella members 2.
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The screen may readily be removed from the window, sinee :lamella member5 2 5an slide.~ via slides 7, to one side ~ along slide rail 8.
,'' ;~, By t~e aid of the s~reen accordi~g to the invention, it is, thus, possible to show adver~ising images and films, : 10 : instructive films, and the like, at the same time as :~eople ~an view a window display~ Besi~es acting as a - :~
~proje~tion screen the screen ~ay also serve as a common sun shade. It will then be especiall~ suitable that lamella .. members 2 can ~e placed at a desired angle to provide ..opti~al view at the same time as suf~icient æun sha~ing is achieved.

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Claims

1. An arrangement of a translucent projection screen intended for back projection to display a projected image, c h a r a c t e r i z e d i n that the screen comprises a number of elongated lamella members (2) of a dull trans-lucent material, which are arranged at a mutual distance (a) in a common screen plane, and which with their own plane (the viewed surface) enclose an angle with the common, screen plane.

2. An arrangement as defined in claim 1, c h a r a c t e r i z e d i n that lamella members (2) are provided at such a mutual distance (a) and at such an angle (.alpha.) that their projection on the common screen plane covers the whole plane.

3. An arrangement as defined in claims 1 and 2, c h a r a c t e r i z e d i n that the lamella members are vertically arranged.

4. An arrangement as defined in one or several of claims 1-3, c h a r a c t e r i z e d i n that the lamella members are turnable about a vertical axis from 0°
to 180°

5. An arrangement as defined in one or several of the preceding claims, c h a r a c t e r i z e d i n that lamella members (2) are manufactured from a translucent, non-transparent material (opaque material), and are inted-ed for back projection, i.e. projected from the opposite side of the viewing side.

6. An arrangement as defined in one or several of the preceding claims, c h a r a c t e r i z e d i n that a common adjustment means (9,10) for all lamella members (2) is provided.

7. An arrangement as defined in claim 6, c h a r a c t e r i z e d i n that said adjustment means is remote controlled.

8. An arrangement as defined in one or several of the preceding claims, c h a r a c t e r i z e d i n that lamella members (2) are arranged to be slidable in their common screen plane, e.g. being suspended at their top ends from a slide rail (8), via slides (7).

9. An arrangement as defined in claim 8, c h a r a c t e r i z e d i n that lamella members (2) are turnably secured in slide (7).