Transparent Fingerprint Sensor System for Large Flat Panel Display
AbstractIn this paper, we introduce a transparent fingerprint sensing system using a thin film transistor (TFT) sensor panel, based on a self-capacitive sensing scheme. An armorphousindium gallium zinc oxide (a-IGZO) TFT sensor array and associated custom Read-Out IC (ROIC) are implemented for the system. The sensor panel has a 200 × 200 pixel array and each pixel size is as small as 50 μm × 50 μm. The ROIC uses only eight analog front-end (AFE) amplifier stages along with a successive approximation analog-to-digital converter (SAR ADC). To get the fingerprint image data from the sensor array, the ROIC senses a capacitance, which is formed by a cover glass material between a human finger and an electrode of each pixel of the sensor array. Three methods are reviewed for estimating the self-capacitance. The measurement result demonstrates that the transparent fingerprint sensor system has an ability to differentiate a human finger’s ridges and valleys through the fingerprint sensor array. View Full-Text
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Seo, W.; Pi, J.-E.; Cho, S.H.; Kang, S.-Y.; Ahn, S.-D.; Hwang, C.-S.; Jeon, H.-S.; Kim, J.-U.; Lee, M. Transparent Fingerprint Sensor System for Large Flat Panel Display. Sensors 2018, 18, 293.
Seo W, Pi J-E, Cho SH, Kang S-Y, Ahn S-D, Hwang C-S, Jeon H-S, Kim J-U, Lee M. Transparent Fingerprint Sensor System for Large Flat Panel Display. Sensors. 2018; 18(1):293.Chicago/Turabian Style
Seo, Wonkuk; Pi, Jae-Eun; Cho, Sung H.; Kang, Seung-Youl; Ahn, Seong-Deok; Hwang, Chi-Sun; Jeon, Ho-Sik; Kim, Jong-Uk; Lee, Myunghee. 2018. "Transparent Fingerprint Sensor System for Large Flat Panel Display." Sensors 18, no. 1: 293.
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