US 2007/0183032 A1Published application

Projection apparatus

AssigneeMitsubishi Electric Corporation

InventorsAtsushi Michimori, Junichi Aizawa, Eiji Niikura, Hidekazu Kodera

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Abstract

A projection apparatus includes an optical engine (10) that projects an image on a screen from a rear side, an engine supporting plate (100) on which the optical engine (10) is placed, an adjusting member (500) of a substantially wedge-shape inserted into between a base portion (11) and a lower surface of the engine supporting plate (100) so that front or rear end of the engine supporting plate (100) is vertically rotatable, a front-to-rear position adjusting unit (56) capable of moving the adjusting member (500) in front-to-rear direction, a slope portion (108) having a slope surface (109) that gradually increases or decreases an angle of a surface of the adjusting member (500) contacting the engine supporting plate (100) in accordance with a movement of the adjusting member (500), and a fixing unit (551, 552) that fixes the engine supporting plate (100) to an adjusted position.

Claims13

Dependent claims

A projection apparatus comprising:

a housing;
a transmission-type screen provided on a front side of said housing;
an optical engine provided in said housing, said optical engine projecting an image on said transmission-type screen from a rear side of said transmission-type screen;
an engine supporting plate on which said optical engine is placed, said engine supporting plate being provided in said housing so that an angle of said engine supporting plate is adjusted to thereby adjust a projecting direction of said optical engine;
a base portion provided on an inner bottom surface of said housing;
an adjusting member having a substantially wedge-shape with nonparallel upper and lower surfaces, said adjusting member being inserted into between said base portion and a lower surface of said engine supporting plate, so that front or rear end of said engine supporting plate is vertically rotatable;
a front-to-rear position adjusting unit capable of pushing said adjusting member frontward and pulling said adjusting member rearward;
a slope portion having a slope surface that gradually increases or decreases an angle of a surface of said adjusting member that contacts said engine supporting plate in accordance with a movement of said adjusting member in front-to-rear direction, and
a fixing unit that fixes said engine supporting plate to an adjusted position.

6 more elements

Dependencies are inferred from the claim text.