部分領域高速読出し機能をもつ低消費電力ID受信CMOSイメージセンサを用いた情報家電マルチリモコン「オプトナビ」システムの提案(<小特集>ヒューマンインフォメーション)

概要

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We developed an "Opto-Navi" system as a multi-purpose visual remote controller of information appliances. The system can be implemented into mobile information appliances such as cellular phones or PDAs. The "Opto-Navi" system incorporates a customized image sensor capable of capturing high-speed ID signals during normal scene imaging. The CMOS image sensor architecture for the "Opto-Navi" system includes a fast-readout function for multiple regions-of-interested (ROIs). In our implementation, pilot signals slower than the video rate were used to define the ROIs. We developed new sensor architecture to suppress the increase in power consumption during high-speed ID readout. Furthermore, the sensor has a simple pixel circuit that enables high-resolution imaging. We fabricated a QVGA image sensor using standard 0.35-μm CMOS technology. We demonstrated the acquisition of 7 IDs with 5×5 pixels at 1.2kfps/ID with simultaneous normal scene imaging at 30fps. The device power consumption was 3.6mW.
2005-12-01