Position detecting function-added projection display apparatus

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United States of America Patent

PATENT NO 9098137
APP PUB NO 20110096031A1
SERIAL NO

12885639

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Abstract

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A position detecting function-added projection display apparatus that optically detects a position of a target object positioned in a forward space in which an image is projected from an image projecting device, includes: a position detecting light source unit that forms a distribution of intensities of position detecting light in the forward space by emitting the position detecting light into the forward space; a plurality of photodetectors that are disposed in the image projecting device and have ranges of incident angles in directions of angles different from each other when the forward space is viewed from the image projecting device; and a position detecting unit that detects the position of the target object based on results of detection of the position detecting light reflected by the target object by using the photodetectors.

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Patent Owner(s)

  • SEIKO EPSON CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakanishi, Daisuke Matsumoto, JP 52 393

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