Projector with adjustably positioned image plate

Details Projector with adjustably positioned image plate Projector with adjustably positioned image plate

2007-02-27

2007-02-27

Koval, Melissa J (Department: 2851)

Optics: image projectors

Distortion compensation

C353S070000, C353S121000

Reexamination Certificate

active

10981804

ABSTRACT:
A project is often positioned so that its optical axis is at an imperfect orthogonal angle with respect to a projection screen. This position causes a keystone distortion as well as imperfect focus in the projected image. To correct these undesirable problems, initially, a lens and/or an image-forming plate is independently repositioned to bring the projected image into focus based upon user input data. The keystone distortion is also corrected by redrawing the image on an image-forming surface based upon additional user input data.

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