Image-projecting apparatus

Details Image-projecting apparatus Image-projecting apparatus

2007-05-22

2007-05-22

Koval, Melissa J. (Department: 2851)

Optics: image projectors

Composite projected image

C353S069000, C353S070000, C353S085000, C353S101000

Reexamination Certificate

active

10970134

ABSTRACT:
The present invention discloses an image-projecting apparatus which employs an AF (auto-focusing) system suitable for use conditions of the image-projecting apparatus and is capable of securing satisfactory AF accuracy under bright conditions. The image-projecting apparatus comprises a projection optical system which projects light from an image-forming element onto a projection surface, and a detecting system which performs a detecting operation of a distance to the projection surface or a detecting operation of a focusing state of the projection optical system with respect to the projection surface. The detecting system determines a condition of the detecting operation on the basis of the light-receiving intensity level of the light-receiving element which receives reflected light from the projection surface of light projected and performs the detecting operation in accordance with the condition.

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