To balance computational performance with thermal comfort, this study explores a consolidated hotspot architecture at the top center of a tablet. We tested hotspot (39°C, 43°C, 45°C, 47°C) and ambient temperatures (25°C, 35°C) with 60 participants, measuring perception, action likelihood, and expectation. The hotspot was observed away from high contact areas, with 43°C identified as the threshold for significant discomfort. Discomfort increased with portrait mode use and higher device and ambient temperatures, while active use duration influenced acceptability. The findings underscore the importance of thermal mapping and contextual sensing, with direct applications for software throttling thresholds of coated aluminum enclosures.
BeaudetteE.FooE.Islam MollaM. T.JohnsonK.DuplerE.GagliardiN.WoelfleH.HalveyM.DunneL. (2024). Investigating user experience of On-Body heating strategies in indoor environments. Ergonomics in Design, 32(2), 25–32. https://doi.org/10.1177/10648046221078720
2.
ChaseB.KarwowskiW. (2000). Attention allocation under thermal stress. Proceedings of the Human Factors and Ergonomics Society - Annual Meeting, 44(29), 363–366. https://doi.org/10.1177/154193120004402995
3.
De KovelC. G. F.Carrión-CastilloA.FrancksC. (2019). A large-scale population study of early life factors influencing left-handedness. Scientific Reports, 9(1), 584. https://doi.org/10.1038/s41598-018-37423-8
4.
HancockP. A.RossJ. M.SzalmaJ. L. (2007). A meta-analysis of performance response under thermal stressors. Human Factors, 49(5), 851–877. https://doi.org/10.1518/001872007X230226
International Electrotechnical Commission (IEC). (2023). Audio/Video, information and communication technology equipment: IEC 62368-1. No 4.
7.
KangS.ChoiH.ParkS.ParkC.LeeJ.LeeU.LeeS.-J. (2019). Fire in your hands: Understanding thermal behavior of smartphones. In: Proceedings of the 25th annual international conference on Mobile computing and networking, 13, 1-6. Association for Computing Machinery.https://doi.org/10.1145/3300061.3300128
8.
MartinK.McLeodE.PériardJ.RattrayB.KeeganR.PyneD. B. (2019). The impact of environmental stress on cognitive performance: A systematic review. Human Factors, 61(8), 1205–1246. https://doi.org/10.1177/0018720819839817
9.
OlwalA.BalkeK.VotintcevD.StarnerT.ConnP.ChinhB.CordaB. (2020). Wearable subtitles: Augmenting spoken communication with lightweight eyewear for all-day captioning. In Proceedings of the 33rd annual ACM symposium on user interface software and technology (pp. 1108–1120). Association for Computing Machinery. https://doi.org/10.1145/3379337.3415817
SekarK. (2013). Power and thermal challenges in mobile devices. In: Proceedings of the 19th annual international conference on mobile computing & networking,363-368.
12.
SmithM.MadineiS. (2024). Assessing the individual experience of comfort. Proceedings of the Human Factors and Ergonomics Society - Annual Meeting, 68(1), 704–708. https://doi.org/10.1177/10711813241260667
13.
SongW.ZhongF.CalautitJ. K.LiJ. (2024). Exploring the role of skin temperature in thermal sensation and thermal comfort: A comprehensive review. Energy and Built Environment, 6(4), 762–781. https://doi.org/10.1016/j.enbenv.2024.03.002
14.
TilleyA. R. (2001). The measure of man and woman: Human factors in design. John Wiley & Sons.
ZhangH.HedgeA. (2017). Overview of human thermal responses to warm surfaces of electronic devices. Journal of Electronic Packaging, 139(3), Article 030802. https://doi.org/10.1115/1.4037146
17.
ZhangH.HedgeA.GuoB. (2015). Ambient temperature effects on user thermal sensation with a simulated tablet computer. Proceedings of the Human Factors and Ergonomics Society - Annual Meeting, 59(1), 1090–1094. https://doi.org/10.1177/1541931215591156
18.
ZhangH.HedgeA.GuoB. (2016). Surface and indoor temperature effects on user thermal responses to holding a simulated tablet computer. Journal of Electronic Packaging, 138(3), Article 031003. https://doi.org/10.1115/1.4033415
