document

External compensation for high-resolution active matrix organic light-emitting diode displays

Verschueren, L. (author), Ameys M., (author), Velazquez Lopez M., (author), Roose F. de, (author), Bonnifait M., (author), Smout S., (author), Ke T.H., (author), Vandenplas E., (author), Kronemeijer A.J., (author), Steudel S., (author), Genoe J., (author), Dehaene W., (author), Myny K., (author)

Two different external compensation methods for high-resolution active matrix organic light-emitting diode (AMOLED) displays are presented and compared. Both compensation methods are implemented using a small pixel circuit, namely, a 3T2C and a 2T1C pixel circuit, allowing high-resolution displays. Due to the simple driving schemes, these...

article 2021

document

A 2t1c amoled display with external compensation reducing on-panel current variations to 0.079%

Verschueren, L. (author), Ameys, M. (author), Lopez, M.V. (author), Smout, S. (author), Ke, T.H. (author), Vandenplas, E. (author), Kronemeijer, A.J. (author), Heremans, P. (author), Genoe, J. (author), Dehaene, W. (author), Myny, K. (author)

This paper presents a new compensation principle using a 2T1C pixel circuit. The implementation shows significant improvement in uniformity for all grey-levels, due to compensation for both VT and β-factor variations. The resulting current variation after compensation in the characterized display area reaches values down to 0.079%.

conference paper 2020

document

Igzo-based identification tags communicating with everyday touchscreens

Papadopoulos, N. (author), Celiker, H. (author), Qiu, W. (author), Ameys, M. (author), Smout, S. (author), Willegems, M. (author), Deroo, F. (author), Steen, J.-L. (author), Kronemeijer, A.J. (author), Dehouwer, M. (author), Mityashin, A. (author), Gehlhaar, R. (author), Dehaene, W. (author), Myny, K. (author)

In this work, we demonstrate a capacitive coupled data transfer with flexible thin-film electronics using touchscreen as ubiquitous reader interface. The capacitive communication to the touchscreen is proven using a 64-bit metal-oxide thin-film capacitive-coupled identification tag. The tag is powered by a thin film battery or thin-film...

conference paper 2020

document

Memory Solutions for Flexible Thin-Film Logic: Up to 8kb, >105.9kb/s LPROM and SRAM with Integrated Timing Generation Meeting the ISO NFC Standard

de Roose, F. (author), Genoe, J. (author), Kronemeijer, A.J. (author), Myny, K. (author), Dehaene, W. (author)

Thin-film transistor (TFT) technologies have long been used predominantly for display fabrication and are attractive for large area, low cost and flexible circuit applications. Thanks to the improving performance of thin-film metal-oxide NFC tags and data processing chips on foil [1], [2], fabs are considering the large-scale production of...

conference paper 2019

document

Organic photolithography for displays with integrated fingerprint scanner

Malinowski, P.E. (author), Ke, T.-H. (author), Akkerman, H. (author), Nakamura, A. (author), Shanmugam, S. (author), van Breemen, A. (author), Velpen, D.V. (author), Vandenplas, E. (author), Hagelsieb, L.M. (author), Verscheuren, L. (author), Genoe, J. (author), Dehaene, W. (author), Kronemeier, A.J. (author), Steudel, S. (author), Gelinck, G. (author), Heremans, P. (author)

Patterning organic materials by photolithography enables not only high-resolution, side-by-side RGB OLED arrays, but also the introduction of organic photodetector in the same frontplane. We show patterned active matrix displays processed on flexible backplane. Furthermore, we demonstrate OPD patterning proof-of-concept. These are the building...

conference paper 2019

document

Printed Organic Photodetector Arrays and their use in Palmprint Scanners

Akkermana, H.B. (author), Peeters, B. (author), van Breemena, A.J.J.M. (author), Shanmugama, S. (author), Tordera Salvador, D.A. (author), van der Steen, J.L.P.J. (author), Kronemeijer, A.J. (author), Malinowski, P. (author), De Roose, F. (author), Cheyns, D. (author), Genoeb, J. (author), Dehaene, W. (author), Heremans, P. (author), Gelincka, G. (author)

Using flat-panel compatible processes we realized 6x8 cm, 200-ppi active-matrix imagers with solution-processed, ultrathin organic photodiodes and demonstrate its performance in a biometric palmprint detector.

conference paper 2018

document

Dual-gate self-aligned IGZO TFTs monolithically integrated with high-temperature bottom moisture barrier for flexible AMOLED

Kronemeijer, A.J. (author), Akkerman, H. (author), van der Steen, J.L. (author), Steudel, S. (author), Pendyala, R. (author), Panditha, P. (author), Bel, T. (author), van Diesen, K. (author), de Haas, G. (author), Maas, J. (author), de Riet, J. (author), Rovers, M. (author), Verbeek, R. (author), Nag, M. (author), Verschueren, L. (author), Genoe, J. (author), Dehaene, W. (author), Lu, Y.J. (author), Chiang, S.C. (author), Huang, Y.Y. (author), Yeh, M.H. (author), Gelinck, G. (author)

conference paper 2018

document

In-Panel 31.17dB 140kHz 87μW Unipolar Dual-Gate In-Ga-Zn-O Charge-Sense Amplifier for 500dpi Sensor Array on Flexible Displays

Papadopoulos, N. (author), Steudel, S. (author), de Roose, F. (author), Eigabry, D.M. (author), Kronemeijer, A.J. (author), Genoe, J. (author), Dehaene, W. (author), Myny, K. (author)

In this paper a charge sense amplifier (CSA) using a 5μm In-Ga-Zn-O transistor technology on 15μm thick flexible substrate is presented for readout of a 500dpi fingerprint sensor array targeting direct integration with active matrix organic light emitting displays (AMOLED). The CSA achieves a linear input range of 0.8V for rail to rail output at...

conference paper 2018

document

In-Panel 31.17dB 140kHz 87W Unipolar Dual-Gate In-Ga-Zn-O Charge-Sense Amplifier for 500dpi Sensor Array on Flexible Displays

Papadopoulos, N. (author), Steudel, S. (author), de Roose, F. (author), Eigabry, D.M. (author), Kronemeijer, A.J. (author), Genoe, J. (author), Dehaene, W. (author), Myny, K. (author)

In this paper a charge sense amplifier (CSA) using a 5μm In-Ga-Zn-O transistor technology on 15μm thick flexible substrate is presented for readout of a 500dpi fingerprint sensor array targeting direct integration with active matrix organic light emitting displays (AMOLED). The CSA achieves a linear input range of 0.8V for rail to rail output at...

conference paper 2018

document

Toward temperature tracking with unipolar metal-oxide thin-film SAR C-2C ADC on Plastic

Papadopoulos, N.P. (author), de Roose, F. (author), van der Steen, J.-L.P.J. (author), Smits, E.C.P. (author), Ameys, M. (author), Dehaene, W. (author), Genoe, J. (author), Myny, K. (author)

The maturity of metal–oxide thin-film transistors (TFT) highlights opportunities to develop robust and low-cost electronics on flexible and stretchable substrates over large area in an industry-compatible technology. Internet-ofEverything applications with sensor nodes are driving the development of analog-to-digital converters (ADCs). In this...

article 2018

document

40x Current Variation Reduction Enabled by an External Vt-Compensation Scheme for AMOLED Displays using a 3T2C-Pixel Circuit with Dual-Gate TFTs

Verschueren, L. (author), Ameys, M. (author), de Roose, F. (author), Steudel, S. (author), van der Steen, J.L.P.J. (author), Gelinck, G.H. (author), Kronemeijer, A.J. (author), Huang, C. (author), Tsai, C. (author), Huang, Y. (author), Yeh, M. (author), Heremans, P. (author), Myny, K. (author), Dehaene, W. (author), Genoe, J. (author)

A novel external VT compensation method, using a simple driving scheme, is presented, enabling high resolution, yet uniform displays, regardless of the size. The uniformity can be maintained for initial VT nonuniformities as well as VT shifts occurring during operation, like bias stress. The characterized display area shows a significant...

conference paper 2018

document

5-3: Distinguished Paper: Power Saving through State Retention in IGZO-TFT AMOLED Displays for Wearable Applications

Steudel, S. (author), van der Steen, J.L. (author), Nag, M. (author), Ke, T.H. (author), Smout, S. (author), Bel, T. (author), van Diesen, K. (author), de Haas, G. (author), Maas, J. (author), de Riet, J. (author), Rovers, M. (author), Verbeek, R. (author), Huang, Y.Y. (author), Chiang, S.C. (author), Ameys, M. (author), de Roose, F. (author), Dehaene, W. (author), Genoe, J. (author), Heremans, P. (author), Gelinck, G. (author), Kronemeijer, A.J. (author)

We present a qHD (960x540 with 3 sub-pixels) top-emitting AMOLED display with 340ppi resolution using a self-aligned (SA) IGZO TFT backplane on polyimide-foil with humidity barrier. The back plane process flow is based on a 7 layer photolithography process with a CD=4um. We implement a 2T1C pixel engine and use commercial source driver IC made...

conference paper 2017

document

A thin-film microprocessor with inkjet print-programmable memory

Myny, K. (author), Smout, S. (author), Rockelé, M. (author), Bhoolokam, A. (author), Ke, T.H. (author), Steudel, S. (author), Cobb, B. (author), Gulati, A. (author), Rodriguez, F.G. (author), Obata, K. (author), Marinkovic, M. (author), Pham, D.V. (author), Hoppe, A. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)

The Internet of Things is driving extensive efforts to develop intelligent everyday objects. This requires seamless integration of relatively simple electronics, for example through ‘stick-on’ electronics labels. We believe the future evolution of this technology will be governed by Wright’s Law, which was first proposed in 1936 and states that...

article 2014

document

Bidirectional communication in an HF hybrid organic/solution-processed metal-oxide RFID tag

Myny, K. (author), Rockelé, M. (author), Chasin, A. (author), Pham, D.V. (author), Steiger, J. (author), Botnaras, S. (author), Weber, D. (author), Herold, B. (author), Ficker, J. (author), Van Putten, B.D. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)

A bidirectional communication protocol allows radio-frequency identification (RFID) tags to have readout of multiple tags in the RF field without collision of data. In this paper, we realized bidirectional communication between a reader system and thin-film RFID tag by introducing a novel protocol for the uplink communication. Amplitude...

article 2014

document

30.1 8b thin-film microprocessor using a hybrid oxide-organic complementary technology with inkjet-printed P2ROM memory

Myny, K. (author), Smout, S. (author), Rockelé, M. (author), Bhoolokam, A. (author), Ke, T.H. (author), Steudel, S. (author), Obata, K. (author), Marinkovic, M. (author), Pham, D.V. (author), Hoppe, A. (author), Gulati, A. (author), Rodriguez, F.G. (author), Cobb, B. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)

We present an 8b general-purpose microprocessor realized in a hybrid oxide-organic complementary thin-film technology. The n-type transistors are based on a solution-processed n-type metal-oxide semiconductor, and the p-type transistors use an organic semiconductor. As compared to previous work utilizing unipolar logic gates [1], the higher...

conference paper 2014

document

Optimized circuit design for flexible 8-bit RFID transponders with active layer of ink-jet printed small molecule semiconductors

Kjellander, B.K.C. (author), Smaal, W.T.T. (author), Myny, K. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author), Gelinck, G.H. (author)

We ink-jet print a blend of 6,13-bis(triisopropyl-silylethynyl)pentacene and polystyrene as the active layer for flexible circuits. The discrete ink-jet printed transistors exhibit a saturation mobility of 0.5 cm2 V -1 s-1. The relative spread in transistor characteristics can be very large. This spread is due to the morphology of the TIPS-PEN...

article 2013

document

Complementary integrated circuits on plastic foil using inkjet printed n- and p-type organic semiconductors: Fabrication, characterization, and circuit analysis

Smaal, W. (author), Kjellander, C. (author), Jeong, Y. (author), Tripathi, A.K. (author), van der Putten, B. (author), Facchetti, A. (author), Yan, H. (author), Quinn, J. (author), Anthony, J. (author), Myny, K. (author), Dehaene, W. (author), Gelinck, G.H. (author)

article 2012

document

Design Methodologies for Organic RFID Tags and Sensor Readout on Foil

Myny, K. (author), Marien, H. (author), Steudel, S. (author), Vicca, P. (author), Beenhakkers, M.J. (author), van Aerle, N.A.J.M. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Steyaert, M. (author), Heremans, P. (author), Cantatore, E. (author)

bookPart 2012

document

Bidirectional communication in an HF hybrid organic/solution-processed metal-oxide RFID tag

Myny, K. (author), Rockelé, M. (author), Chasin, A. (author), Pham, D.-V. (author), Steiger, J. (author), Botnaras, S. (author), Weber, D. (author), Herold, B. (author), Ficker, J. (author), van der Putten, B. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)

The ambition of printing item-level RFID tags is one of the driving forces behind printed electronics research. Organic RFID tags have been shown, initially using p-type organic semiconductors [1-4]. The introduction of n-type organic semiconductors with reasonable performance made organic CMOS conceivable [5] and organic CMOS RFID tags were...

conference paper 2012

document

Unipolar organic transistor circuits made robust by dual-gate technology

Myny, K. (author), Beenhakkers, M.J. (author), van Aerle, N.A.J.M. (author), Gelinck, G.H. (author), Genoe, J. (author), Dehaene, W. (author), Heremans, P. (author)

Dual-gate organic transistor technology is used to increase the robustness of digital circuits as illustrated by higher inverter gains and noise margins. The additional gate in the technology functions as a VT-control gate. Both zero-VGS-load and diode-load logic are investigated. The noise margin of zero- VGS-load inverter increases from 1.15 V...

article 2011