Elderly Vision On Legibility Of Thai Letters Presented On Led Panel

Abstract

Some of Thai letter differ from their similar letter only the length of the letter tail or the gap inside the letter. Presenting Thai letter on LED panel may cause the difficulty for elderly people to discriminate the letters, because the glare from the bright part (text itself or background) of LED panel may obscure letter details. The objective of this research is to investigate the legibility of Thai letters presented on the LED panel with the real and simulated elderly people. The stimuli were sets of Thai letters varied on their size. The letters were black and presented on white background. Subjects were asked to read the random letters. We found that result of the young and the simulated elderly are quite similar whereas the smallest legible letter size of the real elderly is larger than those of two groups.