When an LCD gets too cold the segments of the LCD become less visible and the response time of the display slows.
Though short periods of exposure to temperatures below an LCD’s threshold only have minor effects on the LCD, prolonged exposure to the low temperatures will cause the liquid crystals to assume a solid state or crystallize(freeze). This is referred to as the Theoretical Crystalline-To-Nematic Transition Temperature. However, the low temperature effects are reversible. Even Liquid Crystal Displays that have been immersed in liquid nitrogen have been known to return to their normal operation after warming up.
See graph below to see how rate of change of the LCD slows down as the temperature decreases.
