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US 11,599,014 B2Granted
Projection direction change device and image projection system
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTakaaki Abe, Ken Mashitani, Junji Masumoto
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Abstract
A projection direction change device includes a mirror that reflects light emitted from a projection lens unit of a projector, a mirror support part that rotatably supports the mirror around a first axis and a second axis, a first drive part that rotary drives the mirror around the first axis, and a second drive part that rotary drives the mirror around the second axis. An intersecting point of the first and second axes is positioned closer to the projection lens unit than a geometric barycenter of the mirror is.
Claims14
A projection direction change device, comprising:
- a mirror that reflects light emitted from a projection lens unit of a projector;
- a mirror support part that rotatably supports the mirror around a first axis and a second axis;
- a first drive part that rotary drives the mirror around the first axis;
- a second drive part that rotary drives the mirror around the second axis;
- and
- a mirror frame to which the mirror is attached,
- wherein an intersecting point of the first and second axes is positioned closer to the projection lens unit than a geometric barycenter of the mirror is, and
- wherein weight balance of the mirror frame has been adjusted so that a barycenter of the mirror frame to which the mirror has been attached is positioned closer to the intersecting point of the first and second axes than the geometric barycenter of the mirror is.
5 more elements
Dependencies are inferred from the claim text.