A Passive UHF-RFID Tag with Inkjet-Printed Electrochromic Paper Display
2013 (English)In: Proceedings of the IEEE International Conference on RFID (RFID), 2013, IEEE conference proceedings, 2013, 118-123 p.Conference paper (Refereed)
In this paper, an inkjet-printed electrochromic(EC) paper display integrated with passive UHF-RFID tag is introduced as a solution for passive electronic shelf labels (ESL). To address the system challenges of the limited power budget of passive UHF-RFID tags and the material aging of EC display, a feedback comparator integrated digital displaydriver is proposed based on the study of electrochromic, bi-stable and aging features of the EC display. Modularized baseband with different enableconditions and clock domains is implemented in the system design level. Moreover, to maintain the system functions when the input power is lower than the display refresh power, a duty-cycled power management unit (PMU) is activated to reduce the load current during energy scavenging and drive the display in short intervals, enabling the fast charging of the voltage rectifier and the correct output of the regulated supply for the core circuit. The design is fabricated in a 0.18-um CMOS process with an area of 2.25 mm2. Fed with EPC C1G2 protocol write command, experiments demonstrate correct refresh of EC display with 4 cm2 effective area. System sensitivity at the antenna reference point is basically immune to the display load. Further improvements can be achieved after careful chip-to-antenna impedance matching and PMU efficiency optimization.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2013. 118-123 p.
electrochromic display, bi-stability, aging, passive UHF-RFID, feedback comparator, duty-cycled power management
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-123405DOI: 10.1109/RFID.2013.6548144ISI: 000326738900017ScopusID: 2-s2.0-84881359034ISBN: 978-1-4673-5749-4 (electronic)ISBN: 978-1-4673-5748-7 (print)OAI: oai:DiVA.org:kth-123405DiVA: diva2:626432
2013 IEEE International Conference on RFID, RFID 2013; Orlando, FL; United States; 30 April 2013 through 2 May 2013
Qc 201307182013-06-082013-06-082015-10-12Bibliographically approved