折叠屏手机到东北，纷纷变成雪糕脆皮了

Core Viewpoint - The article discusses the challenges and risks associated with using foldable smartphones in low-temperature environments, particularly in Northeast China, highlighting the fragility of these devices under such conditions [4][10][31]. Group 1: Foldable Smartphone Performance in Cold Weather - Foldable smartphones are not recommended for use in low-temperature regions, as they can become brittle and prone to damage [8][10]. - The article emphasizes that the performance of foldable screens deteriorates significantly in cold weather, with manufacturers advising against usage below certain temperatures [31][36]. - Specific temperature recommendations from manufacturers vary, with Samsung stating its foldable OLED screens can withstand -20°C, while others like OPPO suggest a minimum of 0°C [35][36]. Group 2: Technical Explanation of Screen Fragility - The article explains that the materials used in foldable screens, particularly OLED, become less flexible and more brittle at low temperatures, leading to potential screen damage [20][27]. - The concept of "glass transition temperature" is introduced, indicating that materials can become hard and fragile when temperatures drop below a certain threshold [17][18]. - The structural differences between OLED and traditional LCD screens are highlighted, noting that OLED screens lack the liquid crystal components that can leak when damaged [20][22]. Group 3: Recommendations for Users - Users are advised to avoid folding or opening their devices in cold conditions and to keep them warm, either through body heat or heating sources [30][31]. - The article suggests that while some manufacturers have conducted low-temperature tests, extreme cold (below -30°C) poses significant risks to foldable devices [31][37]. - It is recommended that users refrain from using foldable smartphones in extremely cold environments, such as those found in regions like Mohe, until advancements in low-temperature technology are made [38].