IEEE Solid-State Circuits Magazine - Fall 2017 - 111
Prof. Patrick Yue Gives Distinguished Lecture
at SSCS Central Texas Chapter
I
IEEE Solid-State Circuits Societ y
(SSCS) Distinguished Lecturer (DL)
Prof. Patrick Yue visited the University of Texas at Austin on 4 August
2017. He gave an inspiring talk,
"LED-based Visible Light Communication Systems-Driver SOC Design
and Practical Applications," that drew
over 30 attendees, including University of Texas faculty, graduate
students, and local professionals,
many of whom are SSCS members
or student members. After the talk,
students asked many questions, and
Yue gave very thoughtful answers.
Abstract
This talk presents two advanced visible light communication (VLC) modulator system-on-chips (SoCs). The
first is an IEEE 802.15.7 PHY-I standard compliant VLC transmitter. The
second is an active matrix light-emitting diode (LED) microdisplay driver
SoC with embedded VLC function.
Using ordinary LED lights for VLC
has received a great deal of research
interest over the past decade due to a
number of novel applications, including location-based wireless broadcasting through LED lighting, signs
with LED backlights, and digital LED
displays. Most of the development
of VLC SoCs has focused on wireless
optical receiver design including custom complementary metal-oxide-
semiconductor imagers, whereas,
until recently, VLC transmitters have
Digital Object Identifier 10.1109/MSSC.2017.2746169
Date of publication: 16 November 2017
(From left) Prof. Nan Sun (SSCS Central Texas Chapter cochair), Shaolan Li (University of
Texas at Austin Ph.D. student), SSCS DL Prof. Patrick Yue, and Dr. Nagaraja Revanna (SSCS
Central Texas Chapter chair).
been predominately based on discrete implementation. More importantly, the power consumption of
dedicated VLC transmitters is prohibitively high with bit efficiency
in the 100 nJ/b range. To overcome
these issues, this work demonstrates
the first fully integrated VLC transmitter SoC compliant with the IEEE
802.15.7 standard embedded with a
built-in 8-W LED driver. Excluding the
power consumed by the LED driver,
the SoC achieves a record VLC transmission efficiency of 5 nJ/b. On the
other hand, the miniaturization and
integration of inorganic LED display
modules have attracted significant
research efforts due to their superior
brightness and reliability compared
to organic LED microdisplay. Combining these two technology trends,
this paper also describes an active
matrix LED (AMLED) driver SoC with
built-in VLC modulation capability to
demonstrate a WQVGA smart microdisplay featuring 1.25-Mb/s VLC for
enabling LED digital signage as location-based information broadcaster
and indoor positioning beacons.
-Nan Sun
Chapter Chair, SSCS Central Texas
IEEE SOLID-STATE CIRCUITS MAGAZINE
FA L L 2 0 17
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Table of Contents for the Digital Edition of IEEE Solid-State Circuits Magazine - Fall 2017
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