Cold temperature negatively impacts the performance of liquid crystal displays (LCDs). In cars, this leads to slow response times and reduced image quality. We investigated how the perception of video distortions on LCD screens was affected by cold temperatures down to −43°C. The stimuli were generated using digital filters simulating how different time constants of the LCD crystals would affect the video distortions. Seven levels of time constants were applied to four variations of video content. Simulated videos were shown in a psychophysical experiment involving 20 test persons. Judgements of video clarity and acceptance were conducted by magnitude estimation and category scales. The two different judgements based on magnitude estimations and psychophysical scales gave similar results. Clarity and acceptance correlated. A modified Arrhenius function was employed to model time constants based on temperature, showing unacceptable quality of the LCD-display below –20°C. The traffic scenes were perceived as clear and acceptable with time constants ranging from 0 and 50 ms. The critical range between 50 to 100 ms corresponded to a temperature range between –20°C to –30°C, beyond which clarity and acceptance decreased. Perception of an unacceptable video quality was found for distortions at time constants between 100 to 500 ms
QC 20260520