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1. (EP0981778) NOTEBOOK SIZE LCD PROJECTOR

Office : European Patent Office
Application Number: 98921060 Application Date: 08.05.1998
Publication Number: 0981778 Publication Date: 01.03.2000
Publication Kind : A1
Designated States: DE, ES, FR, GB, IT
Prior PCT appl.: Application Number:US1998009435 ; Publication Number: Click to see the data
IPC:
H 04N
G 03B
G03B 21/16
H04N 5/74
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
5
Details of television systems
74
Projection arrangements for image reproduction, e.g. using eidophor
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
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
21
Projectors or projection-type viewers; Accessories therefor
14
Details
16
Cooling; Preventing overheating
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
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
21
Projectors or projection-type viewers; Accessories therefor
14
Details
16
Cooling; Preventing overheating
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
5
Details of television systems
74
Projection arrangements for image reproduction, e.g. using eidophor
CPC:
G03B 21/30
G03B 21/145
G03B 21/16
H04N 5/7441
H04N 9/3141
Applicants: MINNESOTA MINING & MFG
Inventors: RODRIGUEZ ERNEST M JR
Priority Data: 08858478 16.05.1997 US
9809435 08.05.1998 US
Title: (DE) NOTEBOOK FORMAT LCD PROJEKTOR
(EN) NOTEBOOK SIZE LCD PROJECTOR
(FR) PROJECTEUR PORTATIF A AFFICHAGE A CRISTAUX LIQUIDES
Abstract:
(EN) A compact electronic projector (10) has separate optics and electronics compartments which are thermally and electromagnetically isolated from each other. In this manner closely spaced components are prevented from electrically or thermally interfering with each other, and high quality projected images can be maintained. The optics compartments contains a display assembly, such as a liquid crystal display panel (52) and associated Fresnel lenses, which is mounted inside the projector so as to rotate between a storage position in which the display assembly is generally parallel with the projection axis of the device, and an operational position in which the display assembly (50) is disposed at an oblique angle with relative to the projection axis. The assembly can thus be rotated to occupy the voids needed for expansion and contraction of the optical beams when the projector is in use, but which have no useful function when the projector is not in use.
(FR) La présente invention se rapporte à un projecteur (10) électronique compact pourvu de compartiments optiques et électroniques thermiquement et électromagnétiquement isolés. Ainsi, les composants légèrement espacés n'interfèrent ni électriquement ni thermiquement ensemble, et les images projetées demeurent de grande qualité. Par ailleurs, les compartiments optiques comportent un ensemble d'affichage, tel qu'un panneau d'affichage à cristaux liquides (52) et des lentilles de Fresnel associées, monté dans le projecteur de manière à ce qu'il se déplace entre une position de mémoire où l'ensemble d'affichage est généralement parallèle à l'axe de projection du dispositif, et une position fonctionnelle où ledit ensemble (50) est disposé à un angle oblique par rapport à l'axe de projection. Ainsi, l'ensemble peut être déplacé de façon à occuper les vides requis pour l'expansion et la contraction des faisceaux optiques lorsque le projecteur est utilisé, vides qui n'ont aucune fonction utile lorsque le projecteur n'est pas utilisé.
Also published as:
MXPA/a/1999/010064JP2001525945 CA2287347AU1998073745WO/1998/052098