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1. WO2005066711 - OVERHEAD PROJECTION SCREEN

Publication Number WO/2005/066711
Publication Date 21.07.2005
International Application No. PCT/EP2005/050053
International Filing Date 07.01.2005
Chapter 2 Demand Filed 28.10.2005
IPC
G03B 21/62 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS 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
21Projectors or projection-type viewers; Accessories therefor
54Accessories
56Projection screens
60characterised by the nature of the surface
62Translucent screens
CPC
G02B 5/045
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
04Prisms
045Prism arrays
G03B 21/62
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS 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
21Projectors or projection-type viewers; Accessories therefor
54Accessories
56Projection screens
60characterised by the nature of the surface
62Translucent screens
Applicants
  • THOMSON LICENSING [FR]/[FR] (AllExceptUS)
  • SCHUBERT, Arno [DE]/[FR] (UsOnly)
  • BENOIT, Pascal [FR]/[FR] (UsOnly)
  • SARAYEDDINE, Khaled [LB]/[FR] (UsOnly)
Inventors
  • SCHUBERT, Arno
  • BENOIT, Pascal
  • SARAYEDDINE, Khaled
Agents
  • LE DANTEC, Claude
Priority Data
045002507.01.2004FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) OVERHEAD PROJECTION SCREEN
(FR) ECRAN DE RETROPROJECTION
Abstract
(EN)
The invention relates to an optical plate (12), in particular in a screen for a projection displaying device comprising on the first face thereof, optical elements (14) for erecting rays received from a light source in the form of a beam of rays in a first direction on the plane of a main axis (AA'). A second face (16) is embodied in such a way that it erects the beam in a second direction which differs from the first direction, preferably along the main axis (AA').
(FR)
Une plaque optique (12), notamment dans un écran (10) pour dispositif d'affichage à projection, comporte sur une première face des éléments optiques (14) apte à redresser des rayons reçus d'une source lumineuse en un faisceau de rayons selon une première direction dans un plan qui contient un axe principal (AA'). La seconde face (16) est réalisée de manière à redresser le faisceau selon une seconde direction différente de la première direction, de préférence selon l'axe principal (AA').
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