Compact projection illumination system and method of using same

G - Physics – 02 – B

Patent

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Details

G02B 27/00 (2006.01) G02B 27/18 (2006.01) G09G 3/36 (2006.01) H04N 5/14 (2006.01) H04N 5/74 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2171961

A compact projection illumination system (6A) includes a low profile housing (20A) having an optical system (11A) for directing high intensity reflected light to an image forming display device (24A) mounted substantially horizontal in the housing (20A), a projection lens arrangement (22A) comprised of three groups of optical elements aligned along a common optical axis with a variable vertex length and wide field coverage angle, and a display control system (25A) coupled electrically to the image forming device (24A) includes a compression logic arrangement for compressing high resolution information by eliminating certain horizontal and vertical pixel image information during one frame cycle and by eliminating certain adjacent horizontal and vertical pixel image information during the next frame cycle.

Un système compact (6A) d'éclairage par projection comprend un boîtier (20A) à profil bas pourvu d'un système optique (11A) destiné à diriger une lumière réfléchie de haute intensité sur un dispositif d'affichage (24A) formant une image qui est monté de façon sensiblement horizontale dans le boîtier (20A), et un agencement (22A) de lentilles de projection composé de trois groupes d'éléments optiques alignés le long d'un axe optique commun avec une longueur de sommet variable et un grand angle de couverture du champ. Un système (25A) de commande de l'affichage couplé électriquement au dispositif (24A) de formation de l'image comprend un agencement logique de compression pour la compression d'informations haute résolution par l'élimination de certaines informations d'image à pixels horizontaux et verticaux pendant un cycle d'image et l'élimination de certaines informations d'image à pixels horizontaux et verticaux adjacents pendant le cycle d'image suivant.

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