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논문 기본 정보

자료유형
학술저널
저자정보
Hyeon-Gu Do (Chungnam National University) Seongrim Choi (Chungnam National University) Junsik Woo (Chungnam National University) Ara Kim (Chungnam National University) Byeong-Gyu Nam (Chungnam National University)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.19 No.4
발행연도
2019.8
수록면
404 - 412 (9page)
DOI
10.5573/JSTS.2019.19.4.404

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초록· 키워드

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Hand gesture recognition is one of the secure natural user interface (NUI) mechanisms on wearable devices since it does not reveal user’s intention in public domain. However, its energy dissipation is very demanding since it requires compute-intensive machine vision processing. Recently, wake-up detectors have been proposed to improve the energy-efficiency of always-on sensing nature of the NUI systems by switching off the main functional blocks while just keeping the wake-up detector alive during idle time. However, vision-based wake-up detectors still require power-consuming vision processing so we propose a self-powered vision wake-up detector to alleviate burdens on limited battery lifetime and thus facilitate always-on wake-up detection for the wearable gesture UIs. Our work has four key features to realize the self-powered wake-up detection; 1) near-threshold imaging-harvesting dualmode CMOS image sensor (CIS) with 0.6 V 3T pixels, 2) subthreshold SRAM with disturb-free 0.3 V 10T bitcells, 3) hand detection engine with skin-color invariant Haar-like filters, and 4) on-die switched capacitor DC-DC converter for lightweight system design. Thanks to these features integrated together, this work achieves self-powered operation of alwayson vision wake-up detection.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. SELF-POWERED VISION WAKE-UP DETECTOR
Ⅲ. IMPLEMENTATION RESULTS
Ⅳ. CONCLUSION
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