Background: Healthy child and youth development is fostered through su cient physical activity (PA; including time outdoors), limiting sedentary behaviours (SB), and adequate sleep; collectively known as movement behaviours. Though the COVID-19 virus outbreak has changed the daily lives of children and youth, it is unknown to what extent related restrictions may compromise the ability to play and meet movement behaviour recommendations. This study examined the immediate impacts of COVID-19 restrictions on movement and play behaviours in children and youth. Methods: A national sample of Canadian parents (n=1,472) of children (5-11 years) or youth (12-17 years) (54% girls) completed an online survey that assessed immediate changes in child movement and play behaviours during the COVID-19 outbreak. Behaviours included PA and play, SB, and sleep. Family demographics and parental factors that may in uence movement behaviours were assessed. Correlations between behaviours and demographic and parental factors were determined. For open-ended questions, word frequency distributions were reported. Results: Only 4.8% (2.8% girls, 6.5% boys) of children and 0.8% (1.1% girls, 0.5% boys) of youth were meeting combined movement behaviour guidelines during COVID-19 restrictions. Children and youth had lower PA levels, less outside time, higher SB (including screen time), and more sleep during the outbreak. Parental encouragement and support, parental engagement in PA, and family dog ownership were positively associated with healthy movement behaviours. Although families spent less time in PA and more time in SB, several parents reported adopting new hobbies or accessing new resources. Conclusions: This study provides evidence of immediate collateral consequences of the COVID-19 outbreak, demonstrating an adverse impact on the movement and play behaviours of Canadian children and youth. These ndings can guide efforts to preserve and promote child health during the COVID-19 outbreak and crisis recovery period, and to inform strategies to mitigate potential harm during future pandemics.

Low-temperature poly-silicon thin-film transistors (LTPS-TFTs) on glass substrates in modular micro-LED displays have metal electrodes which are externally exposed to connect LED chips and pads. This structure increases the risk of electrostatic discharge (ESD) from the external environment. Furthermore, glass substrates cause high visible light reflectance. To improve the ESD robustness and reduce visible light reflectance, a backplane structure with a black fine metal mesh is proposed. Modular micro-LED displays with the proposed structure achieved the ESD tolerance higher than 8kV through the standard system-level ESD test and reduced the average visible light reflectance by more than 80%.

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