Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2011-08-23
2011-08-23
Epps, Georgia Y (Department: 2878)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C356S004010
Reexamination Certificate
active
08002416
ABSTRACT:
There are provided a small distance measuring device which enables an accurate distance measurement and has a wide range of measurable distances and a projector which is provided with the distance measuring device.A projector includes a light source unit, a light source side optical system for guiding light from the light source unit to a display device, the display device, a projection side optical system for projecting an image emitted from the display device on to a screen, and a distance measuring device and has a projector control unit for controlling the light source unit and the display device, and the distance measuring device includes a distance calculating part for calculating distances to a plurality of point on the screen and a mean distance thereof, and the projector control means includes an inclination angle calculating part for calculating an inclination angle of the screen based on the distances to the plurality of points on the screen calculated by the distance calculating part and a distortion correcting part for preparing image data of a projected image which has been corrected for distortion from information calculated by the distance calculating part45and the inclination calculating part.
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Casio Computer Co. Ltd.
Epps Georgia Y
Holtz Holtz Goodman & Chick PC
Reilly-Diakun Jori S
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