Skip to content
6CCVD Research

On-Display Transparent Half-Diamond Pattern Capacitive Fingerprint Sensor Compatible With AMOLED Display

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2016-09-01
JournalIEEE Sensors Journal
AuthorsHyunggun Ma, Zhenyi Liu, Sanghyun Heo, Jeeyoon Lee, Kyungmin Na
InstitutionsKorea University, Ulsan National Institute of Science and Technology
Citations36

Abstract

Section titled ā€œAbstractā€

he need for personal security in portable devices has increased. Among several biometric sensing technologies, fingerprint sensing is the most highlighted method. However, a fingerprint sensor in electronics is stifling the demands for a larger interactive display. In this paper, the bottlenecks of placing the sensor on display is discussed, and an on-display mutual capacitive high-resolution transparent fingerprint sensor with a half-diamond pattern is proposed for adapting to the needs of personal security on a larger screen. To overcome various performance limitations on the on-display fingerprint sensor, a metal mesh is used as an electrode material, and the half-diamond pattern is applied. The proposed pattern is compatible with the diamond-patterned active matrix organic light emitter diode display. The proposed sensor has 72??72 channels in a 6 mm ??6 mm area. The sensor satisfies the criteria set by the Federal Bureau of Investigation for fingerprint sensing with 322 capacitors per inch, and the measured transmittance in the visible light region is 79.7%. The proposed sensor achieved a capacitance variation 2.3 times larger than that achieved by the conventional sensor. The five-channel fingerprint sensing circuit to examine the feasibility of fingerprint detection is fabricated with the TSMC 0.18- ??m process.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2013 - A 55dB SNR with 240Hz frame scan rate mutual capacitor $30\times 24$ touch-screen panel read-out IC using code-division multiple sensing technique
  2. 2013 - A highly noise-immune touch controller using filtered-delta-integration and a charge-interpolation technique for 10.1-inch capacitive touch-screen panels
  3. 2010 - Improved pores detection in fingerprints by applying ring leds
  4. 2000 - Portable telecommunication device including a fingerprint sensor and related methods

Reads Similar to This

Nitrogen-Incorporated Hydrogenated Amorphous Carbon Film Electrodes on Ti Substrates by Hybrid Deposition Technique and Annealing Impact of Grain Size on The Q-Factor of Poly-Crystalline Diamond Mems Resonators Heterogenous integration technology using wafer-to-wafer transfer