Thermal Modeling of Outdoor Digital Displays Under Different Brightness Outputs

Kim, Je-Ho; Brown, J. Michael; O’Connor, Kevin; Díaz, Marcos Fernández; Joshi, Yogendra

doi:10.1109/tcpmt.2020.2993521

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…2 Such advantages of LCD make more and more outdoor scenarios employ LCDs as a replacement for traditional posters in markets, rail transits and bus stations to deliver dynamic information and commercial advertisements. 3 However, the outdoor environment is tough and harsh for digital displays, with extreme temperature and humidity changes all year round. 2 Furthermore, the direct-sunlight illumination makes reading out of doors challenging.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 However, the high-brightness BLUs will generate a large amount of heat and accelerate the aging of materials and devices in panels. 3 Therefore, compared with indoor products, outdoor displays demand better long-term stability and reliability against environmental changes. Liquid crystals (LCs) are key components for LCDs and the reliability of LC materials is closely related to the long-term optical behavior of outdoor displays.…”

Section: Introductionmentioning

confidence: 99%

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P‐87: New Liquid Crystal Materials for Outdoor Displays

Li,

Liu,

Wang

et al. 2023

Symp Digest of Tech Papers

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Outdoor displays are widely applied in markets, rail transits and bus stations as a replacement for traditional posters. Due to the relatively harsh operation environment, materials for outdoor displays, such as liquid crystals (LCs), require better stability and reliability than normal indoor products. Herein, to evaluate the difference in reliability and optical properties between normal LCs and outdoor LCs, three LC materials including one normal LC, named LC‐Ref, and two outdoor LCs, LC‐1 and LC‐ 2, were assessed. Compared with LC‐Ref, LC‐1 and LC‐2 displayed wider nematic phase ranges and better reliability. Even though outdoor LCs exhibited right‐shifted V‐T curves, LC‐1 and LC‐2 could achieve similar transmittance ratios with LC‐Ref utilizing high driving voltage. Moreover, utilizing high‐ brightness backlight units (BLUs), outdoor LCs showed faster Toff than LC‐Ref with normal BLUs. Overall, LC‐1 and LC‐2 are potentially excellent LC materials for outdoor displays.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

P‐87: New Liquid Crystal Materials for Outdoor Displays

Li,

Liu,

Wang

et al. 2023

Symp Digest of Tech Papers

View full text Add to dashboard Cite

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Thermal-Fluid Structural Interaction Modeling of Outdoor Digitial Displays

Jimenez

Joshi

Brown³

2021

2021 20th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm)

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Development and Validation of a Transient Heat Transfer Model for Evaluating Thermal Management Solutions for Packaging Next-Generation Smart City Infrastructure Devices

Dey

Jimenez

Brown³

et al. 2022

Journal of Electronic Packaging

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Outdoor digital displays have become increasingly popular and common for smart city applications, and more recently provides a concealment solution and integration point for outdoor communications devices meant to be attached to buildings, streetlamps, or traffic poles. Given the larger energy requirements for powering next generation 5G cellular networks, these devices create unique difficulties in developing and evaluating thermal management solutions. The present study develops and validates the extreme condition transient (ECT) climate model using a CFD/HT numerical model, to evaluate diurnal thermal responses from a representative 5G small cell devices. The model is validated for local conditions present in Atlanta, GA for two unique days. The thermal response from the ECT climate model is presented alongside three real case study locations, Miami, FL, New York City, NY, and Phoenix, AZ.

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Thermal Modeling of Outdoor Digital Displays Under Different Brightness Outputs

Cited by 4 publications

References 3 publications

P‐87: New Liquid Crystal Materials for Outdoor Displays

P‐87: New Liquid Crystal Materials for Outdoor Displays

Thermal-Fluid Structural Interaction Modeling of Outdoor Digitial Displays

Development and Validation of a Transient Heat Transfer Model for Evaluating Thermal Management Solutions for Packaging Next-Generation Smart City Infrastructure Devices

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