P‐181: A Charge‐Share‐Based Relative Read‐Out Circuit for Capacitance Sensing

Jang, Yu‐Sin; Gwak, Kiuk; Lee, Sang-Sung; Lee, Sang‐Gug; Kim, Ji-Hun; Oh, Hyung-Seog

doi:10.1889/1.3500399

Cited by 8 publications

(6 citation statements)

References 2 publications

(1 reference statement)

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“…To reduce the effect of C p a specially designed charge remover (CM) is used to eliminate the charge stored in C p . Similar concepts are introduced in the references [6][7][8]. The charge in C p is constant value so cancellation of the charge in C p is possible by the same counter charge injection to the sensing node.…”

Section: / C Kim Invited Papermentioning

confidence: 97%

60.2: Invited Paper: Advanced In‐cell Touch Technology for Large Sized Liquid Crystal Displays

Kim¹,

Lee²,

Kim³

et al. 2015

Symp Digest of Tech Papers

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We propose an advanced in-cell touch (AIT) sensor integrated on TFT substrate. The proposed touch sensor perceives selfcapacitance formed between touching object and sensing electrode which is made by common electrode of AH-IPS panel. This new touch sensor shows above 50dB-signal-to-noise ratio and multi-touch function without loss of transmittance. Finally we have succeeded in in-cell touch panel development of 15.6" FHD for notebook PC and 7" WVGA for automotive which supports 2mm-thick glove touch.

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Section: / C Kim Invited Papermentioning

confidence: 97%

60.2: Invited Paper: Advanced In‐cell Touch Technology for Large Sized Liquid Crystal Displays

Kim¹,

Lee²,

Kim³

et al. 2015

Symp Digest of Tech Papers

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“…The roughness of aforementioned materials adds air as well in the dielectric mix, impeding the communication coupling. Due to the complexity and diversity of capacitive touchscreens (10) and their electronics (11,12), the communication method of our CT-tag device was verified over a variety of touchscreens from different brands (Apple, Huawei, Samsung). All the above increase the complexity of the overall targeted system that is analyzed in the following.…”

Section: Tag Design Considerationsmentioning

confidence: 99%

“…TMOD is connecting and disconnecting the second electrode to the first electrode and to the ground. The very low off-current of the IGZO technology is leveraged by the modulator since modern readout electronics are very sensitive to charge changes (11,12). Fig.…”

Section: Tag Design Considerationsmentioning

confidence: 99%

78‐4: IGZO‐based Identification Tags Communicating with Everyday Touchscreens

Παπαδόπουλος

Celiker

Qiu

et al. 2020

Symp Digest of Tech Papers

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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 photovoltaic cell that is converting the light of the screen. The thin-film integrated tag has on-chip monolithic electrodes (0.8cm 2), and the integrated circuit employs 409 transistors and dissipates only 140nW of power at 600mV supply voltage. The asynchronous data rate of the chip is up to 35bps, strictly limited by the touchscreen readout electronics.

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“…The complexity and diversity of modern touchscreens 20,21 and their electronics 22,23,24,25,26 is not captured in Fig. 3; it focuses instead on the interface between the tag and the touchscreen and illustrates its main properties.…”

Section: System Design Considerationsmentioning

confidence: 99%

Touchscreen tags based on thin-film electronics for the Internet of Everything

et al. 2019

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Capacitive touchscreens are increasingly widespread, featuring in mobile phones and tablets, as well as everyday objects such as cars and home appliances. As a result, the interfaces are uniquely placed to provide a means of communication in the era of the Internet of Everything. Here we show that commercial touchscreens can be used as reader interfaces for capacitive coupled data transfer. The transfer of data to the touchscreen is achieved using a 12-bit thin-film capacitive radio frequency identification tag powered by a thin-film battery or a thin-film photovoltaic cell that converts light from the same screen. The thin-film integrated circuit has a 0.8 cm 2 on-chip monolithic antenna, employs 439 transistors, and dissipates only 31 nW of power at a supply voltage of 600mV. The chip has an asynchronous data rate of up to 36 bps, which is limited by the touchscreen readout electronics.

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P‐181: A Charge‐Share‐Based Relative Read‐Out Circuit for Capacitance Sensing

Cited by 8 publications

References 2 publications

60.2: Invited Paper: Advanced In‐cell Touch Technology for Large Sized Liquid Crystal Displays

60.2: Invited Paper: Advanced In‐cell Touch Technology for Large Sized Liquid Crystal Displays

78‐4: IGZO‐based Identification Tags Communicating with Everyday Touchscreens

Touchscreen tags based on thin-film electronics for the Internet of Everything

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