Projector with a device for measuring angle of inclination
Patent 7452084 Issued on November 18, 2008. Estimated Expiration Date: 
May 26, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 26, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIntegrated front projection system with distortion correction and associated method Projector and projection image correction method thereof Patent #: 7150536 InventorAssigneeApplicationNo. 11137564 filed on 05/26/2005US Classes:353/70For projection axis inclined to screenExaminersPrimary: Koval, Melissa J.Attorney, Agent or FirmForeign Patent References
International ClassesG03B 21/00G03B 21/14 H04N 3/22 H04N 3/26 AbstractA projector includes a projection device, a cross line positional information acquiring device for acquiring positional information of a cross line between a projection surface of the projection device and a plane crossing the projection surface, an inclination detecting device for calculating an angle of inclination between a projection optical axis of the projection device and the projection surface based on the positional information acquired by the cross line positional information acquiring device, and an image distortion correcting device for correcting a trapezoidal distortion of an input image supplied to the projection device, based on the angle of inclination calculated by the inclination detecting device. | |
