Projector device wherein the incidence angle of the illumination light is made variable depending on whether the projector device is in a used or unused state
AssigneeFuji Photo Film Co., Ltd.
InventorsYasuyuki Miyata, Hitoshi Shimizu
Life of this patent
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Abstract
The thickness of the projector device can be reduced by making the direction of irradiation of a digital micromirror device (DMD) with illuminating light by an illuminating optical system variable depending on whether the projector device is used or not used. As an illuminating optical system is provided rotatably around an optical axis of a projecting optical system, the position of the illuminating optical system can be varied depending on whether the projector device is used or not used, and the overall thickness of the projector device can be thereby reduced.
Claims6
A projector device in which illuminating light from a light source is guided by an illuminating optical system to a digital micromirror device and irradiates the digital micromirror device at a predetermined incidence angle and in a predetermined direction, and light modulated by the digital micromirror device is projected by a projecting optical system on a screen, wherein:
- the direction of irradiation of the digital micromirror device with the illuminating light by the illuminating optical system is made variable depending on whether the projector device is used or unused.
A projector device in which illuminating light from a light source is guided by an illuminating optical system to a digital micromirror device and irradiates the digital micromirror device at a predetermined incidence angle and in a predetermined direction, and light modulated by the digital micromirror device is projected by a projecting optical system on a screen, wherein:
- the digital micromirror device is provided rotatably around a rotation axis vertical to the digital micromirror device, at least part of the illuminating optical system is provided rotatably around the rotation axis so as not to let the direction of irradiation of the digital micromirror device from the illuminating optical system vary, and when the projector device is in use the inclination of the image projected on the screen is corrected by rotating at least part of the illuminating optical system and the digital micromirror device around the rotation axis.
Dependencies are inferred from the claim text.