Projection apparatus, projection method and recording medium...

Details Projection apparatus, projection method and recording medium... Projection apparatus, projection method and recording medium...

2006-07-04

2006-07-04

Koval, Melissa Jan (Department: 2851)

Optics: image projectors

Distortion compensation

C353S030000, C353S052000, C353S085000, C353S101000, C348S745000, C352S140000

Reexamination Certificate

active

07070283

ABSTRACT:
A projection apparatus comprising a projection section for projecting an image corresponding to an input image signal, a distance measuring section for measuring each distance of several positions on an image projection plane made by the projection section, a focus control section for making keystone correction on an image projected by the projection section so that a projection image is formed into a rectangular shape having a proper aspect ratio based on each distance obtained by the distance measuring section while controlling a focus position of the image projected by the projection section, and a control section for instructing to carry out processing by the focus control section.

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