Abstract
Activities with smart devices have been more complicated and diversified, and font legibility is the major factor that influences these activities both directly and indirectly. The legibility of the devices is affected by display size, which is related to font size on the display. This study investigated the effect of display size and font size of Korean letter on readability of mobile devices. This study measured readability by examining reading time for three different display size with five different font sizes from 33 participants. We analyzed the main effect of display size and font size, as well as their interaction effect. The result showed that there was a significant interaction effect between display size and font size. On small display and medium display, the reading time was the shortest in font size 2.4mm, and the longest in font size 2.6mm. On large display, the reading time was the shortest in font size 2.6mm, and the longest in font size 2.2mm. The result of this study will help designers and users in selecting the display and font size.
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