TY - JOUR
T1 - Effects of duration of presentation on legibility threshold for exposed lamp signs
AU - Irikura, Takashi
AU - Nishimura, Yosuke
AU - Watanabe, Hitoshi
PY - 2001
Y1 - 2001
N2 - The time duration for which drivers observe signs while in motion is short; between 0.1-0.5 sec. The optimum brightness of exposed lamp signs and the legibility threshold for this short period recognition must differ from that for longer period recognition. This study is aimed at clarifying the relationship between duration of presentation for exposed lamp signs and legibility threshold. The results show that as duration of presentation decreases, legibility threshold increases, and the legibility threshold at duration of 0.1 sec. is double of that at 0.5 sec. Furthermore, as duration of presentation decreases from 0.5 to 0.03 sec., the quantity of light at the legibility threshold reduces.
AB - The time duration for which drivers observe signs while in motion is short; between 0.1-0.5 sec. The optimum brightness of exposed lamp signs and the legibility threshold for this short period recognition must differ from that for longer period recognition. This study is aimed at clarifying the relationship between duration of presentation for exposed lamp signs and legibility threshold. The results show that as duration of presentation decreases, legibility threshold increases, and the legibility threshold at duration of 0.1 sec. is double of that at 0.5 sec. Furthermore, as duration of presentation decreases from 0.5 to 0.03 sec., the quantity of light at the legibility threshold reduces.
KW - Duration of presentation
KW - Exposed lamp sign
KW - Legibility threshold
KW - Traffic sign
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U2 - 10.2150/jlve.25.2_82
DO - 10.2150/jlve.25.2_82
M3 - Article
AN - SCOPUS:52549107428
SN - 0387-8805
VL - 25
SP - XXXI-XXXII
JO - Journal of Light and Visual Environment
JF - Journal of Light and Visual Environment
IS - 2
ER -