Image projection system

G - Physics – 02 – B

Patent

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Details

G02B 27/18 (2006.01) G02B 26/08 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2277656

An electronic projector has a projection system that includes a spatial light modulator (SLM) for imparting image information to the projected light beam. The light beam leaving the SLM is prepolarized in a defined orientation and the projected light is polarized in the same orientation so as to effectively block any light that has been scattered within the projector and become depolarized. The SLM may be a digital mirror device (DMD) or a liquid crystal device (LCD). Reflective surfaces within the projector may be covered or coated with material that polarizes the reflected light at an orientation orthogonal to the defined orientation.

Un projecteur électronique est doté d'un système de projection qui comprend un modulateur spatial de lumière (MSL) servant à fournir des données d'image au faisceau lumineux projeté. Le faisceau lumineux qui quitte le MSL est prépolarisé dans une direction donnée et la lumière projetée est polarisée de même façon pour masquer la lumière qui peut avoir été dispersée dans le projecteur et dépolarisée. Le MSL peut être constitué de micromiroirs à commutation numérique ou d'un dispositif de cristal liquide. € l'intérieur du projecteur, les surfaces réfléchissantes peuvent être recouvertes d'un matériau qui polarise la lumière réfléchie dans une direction orthogonale à celle établie.

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