https://scholars.lib.ntu.edu.tw/handle/123456789/390844
標題: | A smart-card E-paper display system based on RF power harvesting | 作者: | Chang, H.-C. Yen, J.-Y. Huang, C.-H. Chen, G.-L. Hsu, C.-K. JIA-YUSH YEN |
關鍵字: | E-paper; Radio-frequency identification (RFID); Smart card; Transmission power | 公開日期: | 2015 | 卷: | 61 | 期: | 3 | 起(迄)頁: | 201-212 | 來源出版物: | IETE Journal of Research | 摘要: | This study investigated technologies related to a smart-card display and its wireless charging system, where the wireless receiver in the smart card receives not only the data but also the power required for the display circuitry. The goal of this research was to achieve the required energy transfer during the extremely short reading time when a person swipes his or her smart card. This paper describes the design considerations and the analysis procedures of the transmitter and receiver pair for an electronic paper (E-paper) display. A series of magnetic simulations as well as experimental tests were conducted to investigate the various design factors. The design considerations included the shape and effect of using ferromagnetic cores, the component design for frequency tuning, the geometric arrangements, and the number of turns of the coils. A novel design for power transmission is then proposed using a ferromagnetic core to enhance its energy efficiency. In experiments the transmitter unit provided 250 mW of power to the transmitter antenna. The resultant transmission efficiency (S21) was-5.1 dB over a distance of 4.3 mm. Experimental results show that the smart card receives 220 mW, representing a high transmission efficiency of 88%. Copyright © 2015 by the IETE. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84943368801&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/390844 |
DOI: | 10.1080/03772063.2014.986226 | SDG/關鍵字: | Design; Display devices; Electronic paper; Energy efficiency; Energy harvesting; Energy transfer; Ferromagnetic materials; Ferromagnetism; Radio frequency identification (RFID); Smart cards; Transmitters; Transportation; Design considerations; E-papers; Electronic paper (e-paper); Transmission efficiency; Transmission power; Transmitter and receiver; Transmitter antennas; Wireless charging system; Radio transmission |
顯示於: | 機械工程學系 |
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