Video projection apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkira Yamamoto, Shuichi Kobayashi, Keiichiro Ishihara
Life of this patent
Estimating the term…
Abstract
An image projection apparatus according to the present invention includes: a light modulation system; a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system; an image signal processing unit for supplying an image signal to the light modulation system; a power supplying portion for supplying power to the light modulation system; a head portion that contains the projection optical system; a main body portion that contains the power supplying portion; and a drive connection portion for connecting the head portion with the main body portion, in which the head portion and the main body portion can be relatively driven.
Claims10
An image projection apparatus, comprising:
- a light modulation system;
- a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system;
- image signal processing means for supplying an image signal to the light modulation system;
- a power supplying portion for supplying power to the light modulation system;
- a head portion that contains the projection optical system;
- a main body portion that contains the power supplying portion;
- and
- a drive connection portion for connecting the head portion with the main body portion, in which the head portion and the main body portion can be relatively rotationally driven about a rotational axis which is not in parallel with an optical axis of the projection optical system,
- wherein a position onto which the light from the light modulation system is projected is changed by varying a relative angle in the rotational direction about the rotational axis between the head portion and the main body.
An image projection apparatus, comprising:
- a light modulation system;
- a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system;
- image signal processing means for supplying an image signal to the light modulation system;
- a power supplying portion for supplying power to the light modulation system;
- a head portion that contains the projection optical system;
- a main body portion that contains the power supplying portion;
- and
- a drive connection portion for connecting the head portion with the main body portion, in which the head portion and the main body portion can be relatively rotationally driven about a first rotational axis and about a second rotational axis which is different from the first rotational axis.
An image projection apparatus, comprising:
- a light modulation system;
- a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system;
- image signal processing means for supplying an image signal to the light modulation system;
- a power supplying portion for supplying power to the light modulation system;
- a head portion that contains the projection optical system;
- a main body portion that contains the power supplying portion;
- and
- a drive connection portion for connecting the head portion with the main body portion, in which the head portion and the main body portion can be relatively rotationally driven about a rotational axis which is orthogonal to an optical axis of the projection optical system,
- wherein a position onto which the light from the light modulation system is projected is changed by varying a relative angle in the rotational direction about the rotational axis between the head portion and the main body.
Dependencies are inferred from the claim text.