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Intelligent Packaging with Inkjet-Printed Electrochromic Paper Display –A Passive Display Infotag
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.ORCID iD: 0000-0002-0528-9371
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
Show others and affiliations
2012 (English)In: NIP28 : 28th international conference on digital printing technologies : technical program and proceedings : Digital fabrication 2012 : September 9-13, 2012, Quebec City, Quebec, Canada., The Society for Imaging Science and Technology, 2012, 164-167 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we study the electronic performance of the inkjet-printed electrochromic (EC) display which uses Poly (3,4-ethylenedioxythiophene) (PEDOT) doped with poly (styrenesulfonate) (PSS) as the active material, and extract its equivalent RC model. Results show that by charging PEDOT:PSS with 1.8V for averagely 10s, it can be switched from transparent (oxidation state) to blue (reduced state) and keeps the color for an average of 300s in the absence of energy supply, consuming much lower power than other flexible display technologies. However, it suffers from significant crosstalk effects in passive-matrix addressing and from performance variation as sample changes or time goes on. Based on the results, we design a programmable digital display driver with two different operation modes, and analyze the feasibility to integrate such display function in passive intelligent packaging systems. System simulation results prove it as a promising solution from evaluation of power budget and driving ability with printed interconnections and offchip conductors.

Place, publisher, year, edition, pages
The Society for Imaging Science and Technology, 2012. 164-167 p.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-100335ISI: 000352920200049Scopus ID: 2-s2.0-84875726463ISBN: 978-089208302-2 (print)OAI: oai:DiVA.org:kth-100335DiVA: diva2:544786
Conference
28th International Conference on Digital Printing Technologies, NIP 2012 and Digital Fabrication 2012; Quebec City, QC; Canada; 9 September 2012 through 13 September 2012
Note

QC 20120820

Available from: 2012-08-20 Created: 2012-08-07 Last updated: 2015-12-09Bibliographically approved
In thesis
1. Interactive RFID for Industrial and Healthcare Applications
Open this publication in new window or tab >>Interactive RFID for Industrial and Healthcare Applications
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis introduces the circuit and system design of interactive Radio-Frequency Identification (RFID) for Internet of Things (IoT) applications. IoT has the vision of connectivity for anything, at anytime and anywhere. One of the most important characteristics of IoT is the automatic and massive interaction of real physical world (things and human) with the virtual Internet world.RFID tags integrated with sensors have been considered as one suitable technology for realizing the interaction. However, while it is important to have RFID tags with sensors as the input interaction, it is also important to have RFID tags with displays as the output interaction.Display interfaces vary based on the information and application scenarios. On one side, remote and centralized display interface is more suitable for scenarios such as monitoring and localization. On the other side, tag level display interface is more suitable for scenarios such as object identification and online to offline propagation.

For tag level display, though a substantial number of researches have focused on introducing sensing functionalities to low power Ultra-High Frequency (UHF) RFID tags, few works address UHF RFID tags with display interfaces. Power consumption and integration with display of rigid substrate are two main challenges.With the recent emerging of Electronic Paper Display (EPD) technologies, it becomes possible to overcome the two challenges. EPD resembles ordinary ink on paper by characteristics of substrate flexibility, pattern printability and material bi-stability. Average power consumption of display is significantly reduced due to bi-stability, the ability to hold color for certain periods without power supplies. Among different EPD types, Electrochromic (EC) display shows advantage of low driving voltage compatible to chip supply voltage.Therefore this thesis designs a low power UHF RFID tag integrated in 180 nm CMOS process with inkjet-printed EC polyimide display. For applications where refresh rate is ultra-low (such as electronic label in retailing and warehouse), the wireless display tag is passive and supplied by the energy harvested from UHF RF wave. For applications where refresh rate is not ultra-low (such as object identification label in mass customized manufacturing), the wireless display tag is semi-passive and supplied by soft battery. It works at low average power consumption and with out-of-battery alert.

For remote and centralized display, the limitations of uplink (from tags to reader) capacity and massive-tag information feedback in IoT scenarios is the main challenge. Compared to conventional UHF RFID backscattering whose data rate is limited within hundreds of kb/s, Ultra-wideband (UWB) transmission have been verified with the performance of Mb/s data rate with several tens of pJ/pulse energy consumption.Therefore, a circuit prototype of UHF/UWB RFID tag replacing UHF backscattering with UWB transmitter is implemented. It also consists of Analog-to-Digital Converter (ADC) and Electrocardiogram (ECG) electrodes for healthcare applications of real-time remote monitoring of multiple patients ECG signals. The ECG electrodes are fabricated on paper substrate by inkjet printing to improve patient comfort.

Key contribution of the thesis includes: 1) the power management scheme and circuit design of passive UHF/UWB RFID display tag. The tag sensitivity (the input RF power) is -10.5 dBm for EC display driving, comparable to the performance of conventional passive UHF RFID tags without display functions, and -18.5 dBm for UWB transmission, comparable to the state-of-the-art performance of passive UHF RFID tag. 2) communication flow and circuit design of UHF/UWB RFID tag with ECG sensing. The optimum system throughout is 400 tags/second with 1.5 KHz ECG sampling rate and 10 Mb/s UWB pulse rate.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. xviii, 100 p.
Series
TRITA-ICT-ECS AVH, ISSN 1653-6363 ; 2015:15
Keyword
Radio-Frequency Identification (RFID), Electrochromic (EC) display, energy harvesting, Ultra-Wideband (UWB), remote monitoring, Internet-of-Things (IoT).
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-174380 (URN)978-91-7595-717-3 (ISBN)
Public defence
2015-11-04, Sal B, Elektrum, KTH-ICT, Kistagången 16, Kista, 14:00 (English)
Opponent
Supervisors
Note

QC 20151012

Available from: 2015-10-12 Created: 2015-10-06 Last updated: 2015-10-12Bibliographically approved

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