Projection display device
AssigneeFUJIFILM Corporation
InventorChikara Yamamoto
Life of this patent
Estimating the term…
Abstract
A projection display device of a front projection type includes a light valve that modulates light based on image data and emits the light and an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface, in which the image forming optical system includes a first optical system that includes at least one lens and a first reflection member that reflects the light emitted from the light valve toward the first optical system, the first optical system and the first reflection member are configured to be rotatable in a pitch direction, and the first reflection member rotates by a pitch angle θ/2 in conjunction with rotation of the first optical system by a pitch angle θ.
Claims20
A projection display device of a front projection type comprising:
- a light valve that modulates light based on image data and emits the light;
- and
- an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface,
- the projection display device comprising:
- a first optical system including at least one lens, as the image forming optical system;
- a first reflection member that reflects the light emitted from the light valve toward the first optical system, as the image forming optical system;
- a first gear attached to the first optical system;
- a second gear attached to the first reflection member;
- and
- a third gear,
- wherein the first optical system and the first reflection member are configured to be rotatable in a pitch direction,
- the first gear and the second gear are interlocked with each other through the third gear, and
- the first reflection member rotates by a pitch angle θ/2 in conjunction with rotation of the first optical system by a pitch angle θ, by adjusted a diameter and a number of teeth of the first gear, the second gear, and the third gear.
A projection display device of a front projection type comprising:
- a light valve that modulates light based on image data and emits the light;
- and
- an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface,
- wherein the image forming optical system includes a first optical system that includes at least one lens and at least one reflection member that reflects the light emitted from the light valve,
- the reflection member closest to the projection surface side along an optical path and at least a portion of the first optical system on a magnification side from the reflection member closest to the projection surface side are configured to be integrally rotatable in a yaw direction around an optical axis on the light valve side with the reflection member closest to the projection surface side as a base point, and
- the projection display device includes a second driving unit that rotatably drives the reflection member closest to the projection surface side along the optical path and at least the portion of the first optical system on the magnification side from the reflection member closest to the projection surface side in the yaw direction.
Dependencies are inferred from the claim text.