A drop-impact reliability assessment of mobile display modules using a statistical modeling approach
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DOI 10.1007/s12206-020-2204-y
Journal of Mechanical Science and Technology 34 (10) 2020 Original Article DOI 10.1007/s12206-020-2204-y Keywords: · Drop-impact · Mobile display module · Reliability assessment · Design of experiment · Statistical modeling · Weibull distribution · Inverse-Gaussian distribution
Correspondence to: Suk Joo Bae [email protected]
Citation: Kim, S., Kwon, D., Bae, S. J. (2020). A drop-impact reliability assessment of mobile display modules using a statistical modeling approach. Journal of Mechanical Science and Technology 34 (10) (2020) ?~?. http://doi.org/10.1007/s12206-020-2204-y
A drop-impact reliability assessment of mobile display modules using a statistical modeling approach Seong-joon Kim1, Daeil Kwon2 and Suk Joo Bae3 1
2
Department of Industrial Engineering, Chosun University, Gwangju 61452, Korea, Department of Sys3 tems Management Engineering, Sungkyunkwan University, Suwon 16419, Korea, Department of Industrial Engineering, Hanyang University, Seoul 04763, Korea
Abstract
Since drop-impact is the most frequent cause of failure of mobile devices and the display is the major channel for users to interact with mobile devices, the reliability of the display module by drop-impact is one of the most important concerns for both manufacturers and customers. In this paper, we propose- a drop-impact reliability assessment method for the mobile display module using a statistical modeling approach. First, the general likelihood functions that consider various censored data are proposed to obtain accurate estimates. Second, under the constraints of the test budget and the sample size, the optimization problem for minimizing the mean squared error of the target of interest with the decision variables was proposed. The proposed method was applied to the real application example to determine the most reliable mobile display module design.
Received April 25th, 2020 Revised
May 12th, 2020
Accepted May 12th, 2020 † This paper was presented at ICMR2019, Maison Glad Jeju, Jeju, Korea, November 27-29, 2019. Recommended by Guest Editor Insu Jeon
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
1. Introduction Nowadays, mobile electronic devices with a large multifunction display, such as smartphones and tablet computers, are widely used and have become an essential and ubiquitous part of our lives. Meanwhile, the average display size of mobile devices has been steadily increased while the thickness has been reduced. This makes the display module more vulnerable to dropimpact which is inevitable during use of the mobile device. Drop-impact is known as one of the most frequent causes of failure of mobile devices. Since the multifunction display is the main way users interacted with the mobile devices, the reliability of the display module by dropimpact is one of the most important concerns for both manufacturers and customers. In recent decades, there have been extensive studies on drop-impact. Most existing approaches can be categ
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