Mobile phone screen protector glass: A TL investigation of the intrinsic background signal

Abstract

Screen protector glasses are often used to protect the display screen surface of mobile phones against physical damage. Their dosimetric properties were recently studied by thermoluminescence with the aim of using these items as potential emergency dosimeters in the event of a radiological accident. They are sensitive to ionizing radiation and they could be easily removed and replaced without destroying the phone in case of a dose assessment. However, an intrinsic background signal that partially overlaps with the radiation-induced TL signal is observed. The reconstructed dose could be overestimated if not properly taken into account. The homogeneity of this confounding signal on the surface of several screen protectors was estimated and a chemical treatment with hydrofluoric acid (HF 40%) was tested to minimize its contribution. For most of the samples studied, the intrinsic background signal remained a serious issue for dose reconstruction. Additionally, the TL signals were measured in the red detector range using two different models of red-sensitive photomultiplier tubes. The homogeneity of the intrinsic background signal on the surface of screen protectors was examined and the results of the reduction of this signal by the chemical HF treatment were discussed.

Rational Design of Clear POSS Coatings with High Hardness, Excellent Flexibility, and Multifunctionality for Foldable Displays

“…As a disruptive technological innovation, foldable displays are rapidly gaining prominence in the field of mobile devices. , The cover window, a crucial component of flexible or foldable displays, is designed to protect internal electrical components without compromising visual effects or bending capabilities. , Typically, glass has been widely employed as a protective material for conventional screens due to its high optical transparency and surface hardness . However, the fragility of glass renders it unsuitable for the demands of flexible and foldable devices.…”

“…3,4 Typically, glass has been widely employed as a protective material for conventional screens due to its high optical transparency and surface hardness. 5 However, the fragility of glass renders it unsuitable for the demands of flexible and foldable devices. To achieve foldable displays, one of the current mainstream solutions involves the use of polymer films, such as colorless polyimide (CPI).…”

Feasibility Study of Using Earbuds and Wireless Headphones for Retrospective Dosimetry

“…For example, the use of OSL from the protective back-glass of modern mobile phones with wireless charging capabilities has been suggested and a custom-made OSL reader has been built to perform the measurements without dismantling the phone (Sholom et al, 2020;Chandler et al, 2021;Sholom and McKeever, 2021). In addition, the use of TL from mobile phone protective glasses (Bassinet and Le Bris, 2020;Bassinet et al, 2022;Discher et al, 2023) has been investigated.…”