Title :
Flat panel fingerprint optical sensor using TFT technology
Author :
Yi-Huan Liao;Chun Chang;Chih-Hao Lin;Jhen-Yu You;Hao-Lun Hsieh;Jing-Wen Chen;An-Thung Cho;Yu-Rong Liu;Ying-Hui Lai;Jen-Pei Tseng;Min-Feng Chiang;Yu-Chieh Lin
Author_Institution :
Advanced Device Research Div., AU Optronics Corporation, Hsinchu, Taiwan
Abstract :
A 3.2×3.0 inch2 optical type fingerprint scanning flat panel is designed and implemented. The driving system is based on the passive pixel sensor (PPS) array with amorphous silicon (a-Si) TFT technology. The sensing layer of the optical sensor is composed of the Si-nanocrystals (Si-NCs) embedded in the dielectric material. The pixel density is over 500 PPI and the gray levels are up to 256 with excellent linearity.
Keywords :
"Fingerprint recognition","Optical sensors","Thin film transistors","Optical imaging","Linearity","Biomedical optical imaging"
Conference_Titel :
SENSORS, 2015 IEEE
DOI :
10.1109/ICSENS.2015.7370374
