Smart μLED Display-VLC System With a PD-Based/Camera-Based Receiver for NFC Applications

This paper presents a smart micro-light-emitting-diode (μLED) display system employing visible light communication (VLC) as the near-field communication technology for portable devices equipped with μLED displays. In the transmitter, a VLC modulator is integrated into a 400 × 240 gallium nitride (Ga...

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Vydáno v:IEEE photonics journal Ročník 11; číslo 1; s. 1 - 8
Hlavní autoři: Xianbo Li, Hussain, Babar, Jian Kang, Hoi Sing Kwok, Yue, C. Patrick
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Cameras
CMOS image sensor (CIS)
Communications systems
Display devices
Gallium nitrides
Light emitting diodes
micro-light-emitting-diode (μLED) display
Misalignment
Modulation
Near field communication
near-field communication (NFC)
Optical communication
Optical imaging
Optical receivers
Optical transmitters
photodiode (PD)
Photodiodes
Portable equipment
Product design
smart display
Smartphones
Stimulated emission
Visible light communication (VLC)
VLC modulator
VLC receiver
ISSN:1943-0655, 1943-0647
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Popis
Shrnutí:This paper presents a smart micro-light-emitting-diode (μLED) display system employing visible light communication (VLC) as the near-field communication technology for portable devices equipped with μLED displays. In the transmitter, a VLC modulator is integrated into a 400 × 240 gallium nitride (GaN) μLED display with a pixel size of 30 × 30 μm 2 to enable simultaneous display and VLC functions. In the receiver, two different configurations are implemented, including a photodiode (PD)-based and a smartphone camera-based receiver. The smart μLED display-VLC system with the two different receivers is characterized by varying the distance and the angle between the transmitter and the receiver. Experimental results show that the PD-based system can achieve a bit rate of 2 Mb/s and a maximum overall data rate of 550 kb/s beyond 10 cm, but it is sensitive to angular misalignment. In contrast, the camera-based system is more suitable for the transmission of short pieces of information at a bit rate of 16.6 kb/s, and the maximum overall data rate is 5 kb/s at a distance of 5 cm (and 2.5 kb/s when the distance is extended to 10 cm). Moreover, the camera-based system is less sensitive to angular misalignment.
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ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2019.2892948