University of Oulu

T. Leikanger, C. Schuss and J. Häkkinen, "Calibration of smartphone light sensors with a near field communication enabled reference," 2016 IEEE SENSORS, Orlando, FL, USA, 2016, pp. 1-3. doi: 10.1109/ICSENS.2016.7808930

Calibration of smartphone light sensors with a near field communication enabled reference

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Author: Leikanger, Tore1; Schuss, Christian1; Häkkinen, Juha1
Organizations: 1Circuits and Systems (CAS), University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2016
Publish Date: 2017-01-15


This paper describes a technique for calibrating the internal ambient light sensor (ALS) in smart phones. The calibration process depends on Near-Field Communication (NFC). The system consists of an NFC core implemented in an Field-Programmable Gate-Array (FPGA) development platform featuring the NFC analog front end circuit. In the proposed system, the smart phone interacts directly with a reference ALS through the NFC device The direct communication is possible with the help of a custom NFC command that controls an Inter-Integrated Circuit (I2C) master core in the FPGA. After the calibration process of the ALS in a smart phone is completed, the accuracy of the measurement is greatly improved. This is helpful to obtain precise information on the light intensity in indoor surroundings.
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Series: Proceedings of IEEE Sensors
ISSN: 1930-0395
ISSN-E: 2168-9237
ISSN-L: 1930-0395
ISBN: 978-1-4799-8287-5
ISBN Print: 978-1-4799-8288-2
Pages: 1571 - 1573
DOI: 10.1109/ICSENS.2016.7808930
Host publication: 2016 IEEE SENSORS
Conference: IEEE SENSORS
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
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