One of the symptoms of plagues, epidemics or pandemics is often a fever, so during such unprecedented times, handheld infrared thermometers are vital devices for monitoring symptomatic individuals. It is therefore very important to enhance reading efficiency when these thermometers are used for lengthy periods of time in a low illuminance environment. The need for the efficient reading of infrared thermometers or a fast reaction time when reading the information is even more relevant now during the COVID-19 pandemic. In this study, a target search experiment of digital characters is carried out through a simulated interface and use scenarios of a handheld thermometer based on three variables: the inclination angle or slant of the seven segment display characters, screen brightness, and ambient illuminance. The experimental results show that the inclination angle or slant of the characters and ambient illuminance have a significant effect on the reaction speed. In general, the slowest reaction time is found when reading characters with a slant of 10° to the left and the reaction time is the fastest with a right slant of 20°. A continued reduction in ambient illuminance does not affect the visual recognition performance but instead further enhances reading efficiency. Increasing the screen brightness increases the reaction time more in relatively low ambient illuminance conditions as opposed to relatively high ambient illuminance, which implies that in higher ambient illuminance conditions, a brighter screen needs to be used to obtain the same reaction speed as that in lower ambient illuminance conditions.

瘟疫，流行病或大流行的症状之一通常是发烧，因此在如此空前的时间内，手持式红外温度计是监测有症状个体的重要设备。因此，在低照度环境中长时间使用这些温度计时，提高读取效率非常重要。现在，在COVID-19大流行期间，对有效读取红外温度计或在读取信息时快速反应的需求显得尤为重要。在这项研究中，通过模拟界面进行了数字字符的目标搜索实验，并使用了基于三个变量的手持温度计的使用场景：七个段显示字符的倾斜角度或倾斜度，屏幕亮度和环境照度。实验结果表明，字符的倾斜角或倾斜度和环境照度对反应速度有显着影响。通常，当读取字符向左倾斜10°时，发现反应时间最慢，而向右倾斜20°时，反应时间最快。持续降低环境照度不会影响视觉识别性能，但会进一步提高阅读效率。与相对较高的环境照度相比，增加屏幕亮度会在相对较低的环境照度条件下增加更多的反应时间，这意味着在较高的环境照度条件下，需要使用更亮的屏幕才能获得与较低环境的照度相同的反应速度。照度条件。