KEYWORDS: Sensors, LCDs, Electrodes, Image sensors, Image resolution, Super resolution, Image enhancement, Mobile devices, Optical resolution, Current controlled current source
The need for touch based authentication is growing rapidly in smartphones and tablets. Historically, fingerprint
has served at its fullest capacity in establishing the uniqueness of an individual’s identity. In this paper
we present a novel design of capacitive in-cell TFT-LCDs that supports both fingerprint scan and touch sensing
by extending the in-cell capacitive sensing scheme. We discuss a novel readout circuit design that drives the
capacitive sensors for touch interactions in low resolution and for fingerprint scan at higher resolution. Furthermore,
we propose to enhance the low resolution fingerprint data with image super resolution. Evaluation results
show that with super resolution, the proposed touch-fingerprint in-cell TFT-LCD design can support fingerprint
verification with sensor pitch of 0.15mm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.