Effects of duration of presentation on legibility threshold for exposed lamp signs

Takashi Irikura; Yosuke Nishimura; Hitoshi Watanabe

doi:10.2150/jlve.25.2_82

Effects of duration of presentation on legibility threshold for exposed lamp signs

Takashi Irikura, Yosuke Nishimura, Hitoshi Watanabe

Regional Environment Systems

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	XXXI-XXXII
Journal	Journal of Light and Visual Environment
Volume	25
Issue number	2
DOIs	https://doi.org/10.2150/jlve.25.2_82
Publication status	Published - 2001

Keywords

Duration of presentation
Exposed lamp sign
Legibility threshold
Traffic sign

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.2150/jlve.25.2_82

Cite this

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title = "Effects of duration of presentation on legibility threshold for exposed lamp signs",

abstract = "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.",

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AU - Irikura, Takashi

AU - Nishimura, Yosuke

AU - Watanabe, Hitoshi

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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

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Effects of duration of presentation on legibility threshold for exposed lamp signs

Abstract

Keywords

ASJC Scopus subject areas

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