Projector with rotatable projection lens
AssigneeFUJIFILM Corporation
InventorHironobu KAYANO
Life of this patent
Estimating the term…
Abstract
A projection lens is separated by a second mirror into a first optical system that is disposed so as to be closer to an image forming panel and a second optical system that includes the second mirror and is disposed so as to be closer to a screen which is a projection surface. The second optical system is held rotatably around a second optical axis with respect to the first optical system by a first rotation mechanism. A rotation angle of the second optical system with respect to the first optical system is detected by a first sensor. A tilt angle of the projected image on the projection surface by the rotation angle is obtained by a tilt correction section, and the display position of the image to be displayed on the image forming panel is corrected according to the tilt angle.
Claims11
A projector comprising:
- an image forming panel;
- a projection lens;
- a casing to which the projection lens is attached;
- and
- a controller,
- wherein the projection lens comprising:
- a first mirror to bend a first optical axis to a second optical axis;
- a second mirror to bend the second optical axis to a third optical axis;
- a first optical system including the first mirror and disposed on the image forming panel side with respect to the second mirror in an optical path;
- a second optical system including the second mirror and disposed on the projection surface side with respect to the first optical system in the optical path;
- a first rotation mechanism holding the second optical system rotatably around the second optical axis with respect to the first optical system;
- a second rotation mechanism holding the first optical system rotatably with respect to the casing;
- and
- a barrel through which light of the second optical axis passes,
- wherein the first rotation mechanism includes a first sensor for detecting a rotation angle of the second optical system with respect to the first optical system, and
- the second rotation mechanism includes a second sensor for detecting a rotation angle of the first optical system with respect to the casing.
Dependencies are inferred from the claim text.