Video projection apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkira Yamamoto, Shuichi Kobayashi, Keiichiro Ishihara
Life of this patent
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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.
Claims11
1-18. (canceled)
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.
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.
Dependencies are inferred from the claim text.