Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahiro Ogawa0
Date of Patent
August 7, 2007
0Patent Application Number
108662990
Date Filed
June 10, 2004
0Patent Primary Examiner
Patent abstract
A projector includes two range sensors of a phase difference method. The range sensors are laid out near a projection lens in such a way that a line connecting the centers of two photo-sensor arrays incorporated in one of the range sensors crosses a line connecting the centers of two photo-sensor arrays incorporated in the other range sensors approximately at the right angles. A control section controls those range sensors to measure distances to a plurality of ranging points on a screen. The control section computes the tilt angle of the screen based on the measured distances and supplies the computed tilt angle to a trapezoid correcting section and an optical mechanism section.
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