MRI and Georgia Tech have been collaborating on research involving BoldVu® displays.  The research work has two areas of focus: 1) the internal cooling system of the display, and 2) the use of BoldVu® in smart cities.  Several publications have resulted from this collaboration, in the form of conference proceedings and journal papers. All this in an effort to establish research-based evidences for claims of the performance and utility of BoldVu® displays in applicable markets.

Publication:

Thermal Modeling of Outdoor Digital Displays Under Different Brightness Outputs

Citation:

Kim, J. Michael Brown, K. O’Connor, M. Diaz and Y. Joshi, “Thermal Modeling of Outdoor Digital Displays Under Different Brightness Outputs,” in IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 10, no. 6, pp. 949-955, June 2020, doi: 10.1109/TCPMT.2020.2993521.

Abstract:

The thermal design process for electronic products often minimizes the use of computational fluid dynamics and heat transfer (CFD/HT) software in favor of quick prototyping and testing to determine the thermal characteristics of the product. For large-scale products with many thermal challenges, such a strategy can be impractical due to the high cost of prototyping cycles, time constraints, and inevitable iterations involved. In such cases, thorough CFD/HT models developed early in the design process are valuable for driving the product design. Based on this idea, the study examines thermal performance of 55” outdoor digital displays using CFD/HT tools and a prediction under hazardous outdoor condition is made for two different brightness outputs. The prediction is extrapolated and validated through the outdoor testing and simulation comparisons. It is shown that CFD/HT software can be used as a means of making conservative design choices.

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Publication:

Packaging Environmental Sensors for Monitoring Urban-Microclimates

Citation:

Dey, J. M. Brown, and Y. Joshi, “Packaging Environmental Sensors for Monitoring Urban-Microclimates,” ASME Journal of Engineering for Sustainable Buildings and Cities, vol. 1, no. 3, 2020, doi: 10.1115/1.4047422.

Abstract:

An internet-of-things (IoT)-based low-cost sensor network can be used to collect the data necessary to study both Urban Heat Island (UHI) and air pollution. There are several key challenges associated with an IoT-based solution to environmental data monitoring, including packaging and deployment. This study explores these challenges by looking at effects the packaging has on the deployed environmental sensors. Several packaging designs are numerically studied using a computation fluid dynamics (CFD) model. Two sensor designs are chosen using results obtained from CFD modeling and then experimentally deployed. The findings conclude that the IoT sensors chosen for this study are not significantly affected by flow velocities or require advanced packaging designs when paired with street-side outdoor digital displays.

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Publication:

Thermal Management of Outdoor Digital Displays – A Review

Citation:

Y. Joshi and J. M. Brown, “Thermal Management of Outdoor Digital Displays – A Review,” 2019 18th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), Las Vegas, NV, USA, 2019, pp. 772-779, doi: 10.1109/ITHERM.2019.8757287.

Abstract:

Outdoor digital displays are increasingly being used for information dissemination, interactive content location, and advertising in urban locations. While the existing thermal management approaches for indoor digital displays are well understood and generally sufficient due to their lower power dissipation, outdoor liquid crystal displays (LCDs) are subject to many additional constraints, such as harsher and changing ambient environment, solar insolation, and larger internal heat generation in the current state-of-the-art light emitting diodes (LEDs) and other associated electronics. Demands for larger and brighter displays continue to provide significant additional challenges to their therm