Projector and projection image correction method thereof
Patent 7150536 Issued on December 19, 2006. Estimated Expiration Date: 
August 6, 2024. 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.
August 6, 2024. 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.InventorAssigneeApplicationNo. 10912817 filed on 08/06/2004US Classes:353/69, DISTORTION COMPENSATION353/70, For projection axis inclined to screen353/30, COMPOSITE PROJECTED IMAGE348/746, Raster shape distortion725/151, Receiver (e.g., set-top box)348/744Projection deviceExaminersPrimary: Perkey, W. B.Assistant: Cruz, Magda Attorney, Agent or FirmForeign Patent References
International ClassesG03B 21/60G03B 21/14 G03B 21/26 AbstractA transformation coefficient storing unit has correction tables which are generated based on classification of zooming magnification in a manner of arithmetic progression. An optical mechanism unit supplies information on a zooming magnification Z to a switch control unit of the transformation coefficient storing unit. The switch control unit controls a table selection unit to select any from the correction tables based on the zooming magnification Z. The transformation coefficient storing unit selects a coefficient set from the selected correction table based on inclination angles θH and θV and supplies the selected coefficient set to a trapezoidal correction unit. The trapezoidal correction unit performs trapezoidal correction based on the supplied coefficient set. | |
