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Session
50
: Bio and Neuromorphic Application of Flexible Devices |
Flexible Displays and e-Paper
|
Wednesday, May 15 / 03:30 PM - 4:50 PM / San Jose Convention Center, LL21AB
Chair:
Kyung Cheol Choi, KAIST, Daejeon, South Korea
Co-Chair:
Ze Yuan, UltraReality Technology Limited, Fremont, CA US
50.1 - Invited Paper: Flexible Imager with Organic Photodetector for Sensing Applications (3:30 PM - 3:50 PM)
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Tomoyuki Yokota, Cheng Dongkai, Haoyang Wang, Takao Someya
The University of Tokyo Tokyo Japan
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A flexible imager with high resolution is created and high-speed readout characteristics are observed. The imager contains low-temperature polycrystalline silicon thin-film transistors and organic photodiodes. Pulse-wave signals are measured, images of fingerprints and veins are taken, and normal tangential pressures using three-axis tactile pressure sensors with flexible optical components are also detected.
50.2 - Ultrathin Cantilever-Type Flexible Device with Integrated Micro-OLEDs Using Biomedical Implantable Applications (3:50 PM - 4:10 PM)
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Junhee Sim, Somin Lee, Kyung Cheol Choi
Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea
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A flexible cantilever micro-organic light-emitting diode (m-OLED) with a red-emitting material is fabricated on an ultrathin organic film and demonstrated. This flexible platform satisfies the necessary light irradiation conditions applicable for phototherapeutic applications and also holds potential for biomedical implantable areas such as neurotherapy.
50.3 - Invited Paper: An Active-Matrix High-Channel-Count Neurostimulation System Enabled by Flexible Thin-Film Transistors (4:10 PM - 4:30 PM)
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Bowen Liu, Taoming Guo, Yueshan Qin, Yangkun Hou, Chen Jiang
Tsinghua University Beijing China
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Hanbin Ma
Suzhou Institute of Biomedical Engineering and Technology Suzhou China
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Advanced neurostimulation systems require an intimate interface with the brain or peripheral nervous system to provide a therapeutic modulation for patients experiencing neural function loss. To achieve this, stimulators with high-channel counts and mechanical flexibility are required. A 4T1C neurostimulation pixel circuit with an active-matrix architecture, offering the opportunity for high-channel counts, is shown in this work. In addition, a 4-mask photolithographic process for a highly uniform organic thin-film transistor (OTFT) integrated system shows a high device yield of 100% (50/50) and small device variation in threshold voltage of 0.64 V and in mobility of 4.9%. By implementing OTFTs to this novel neurostimulation architecture, an OTFT-based high-channel-count neurostimulation system shows a high stimulator yield of 71.0% and a small variation of 15.6% for the output stimulation currents among pixels.
50.4 - Invited Paper: Low-Temperature Metal-Oxide Thin-Film Transistor Technology and the Realization of Electronic Systems on Flexible Substrates (4:30 PM - 4:50 PM)
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Runxiao Shi, Yushen Hu, Xinying Xie, Man Wong
The Hong Kong University of Science and Technology Hong Kong Hong Kong
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Presently reviewed are improved techniques for forming the source/drain regions and reducing the population of channel defects in a metal-oxide TFT. These have been applied to the construction of different TFT structures, including ones with bottom gate, top gate, and dual gates. The utility of the improved 300C technology has been demonstrated by the realization of a variety of electronic systems, such as a gate-driver-on-array for active-matrix displays, an analog front-end for acquiring bio-potential signals, and an artificial neural network for neuromorphic computing.