Evaluation of legibility and visual fatigue caused by luminescent text displays

Daiki Saito; Keiichi Watanuki; Keiichi Muramatsu; Kazunori Kaede; Masutsugu Tasaki; Takashi Kanahira; Eiji Ishiguro; Naoya Mashiko

doi:10.1007/978-3-319-73888-8_100

Evaluation of legibility and visual fatigue caused by luminescent text displays

Daiki Saito, Keiichi Watanuki, Keiichi Muramatsu, Kazunori Kaede, Masutsugu Tasaki, Takashi Kanahira, Eiji Ishiguro, Naoya Mashiko

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Light-emitting diodes (LEDs) are widely used for backlighting text indicators in vehicles. It is desirable that such text indicators have high legibility and low fatigue-inducing qualities. Suitable spectral distributions for text presentation in vehicles have not yet been clarified. This study examined legibility and fatigue when participants read Japanese sentences presented through backlight emission for 10, min in a dark room. The backlight indicators employed four type of white LEDs. The participants were asked to answer questionnaires to evaluate legibility and fatigue. Moreover, the critical fusion frequency and brain activity were measured to evaluate fatigue objectively. The questionnaire results show that all colored backlighting displayed almost an equal legibility. The overall result suggests that participants were most and least fatigued when viewing text illuminated by high color-rending and greenish white backlighting, respectively. Thus, fatigue can be reduced using LEDs with different spectral distributions.

Original language	English
Title of host publication	Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018
Subtitle of host publication	Integrating People and Intelligent Systems
Editors	Waldemar Karwowski, Tareq Ahram
Publisher	Springer Verlag
Pages	646-651
Number of pages	6
ISBN (Print)	9783319738871
DOIs	https://doi.org/10.1007/978-3-319-73888-8_100
Publication status	Published - 2018
Externally published	Yes
Event	1st International Conference on Intelligent Human Systems Integration: Integrating People and Intelligent Systems, IHSI 2018 - Dubai, United Arab Emirates Duration: 2018 Jan 7 → 2018 Jan 9

Publication series

Name	Advances in Intelligent Systems and Computing
Volume	722
ISSN (Print)	2194-5357

Other

Other	1st International Conference on Intelligent Human Systems Integration: Integrating People and Intelligent Systems, IHSI 2018
Country	United Arab Emirates
City	Dubai
Period	18/1/7 → 18/1/9

Keywords

Fatigue
LED
Legibility

ASJC Scopus subject areas

Control and Systems Engineering
Computer Science(all)

Access to Document

10.1007/978-3-319-73888-8_100

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Cite this

Saito, D., Watanuki, K., Muramatsu, K., Kaede, K., Tasaki, M., Kanahira, T., Ishiguro, E., & Mashiko, N. (2018). Evaluation of legibility and visual fatigue caused by luminescent text displays. In W. Karwowski, & T. Ahram (Eds.), Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018: Integrating People and Intelligent Systems (pp. 646-651). (Advances in Intelligent Systems and Computing; Vol. 722). Springer Verlag. https://doi.org/10.1007/978-3-319-73888-8_100

Evaluation of legibility and visual fatigue caused by luminescent text displays. / Saito, Daiki; Watanuki, Keiichi; Muramatsu, Keiichi; Kaede, Kazunori; Tasaki, Masutsugu; Kanahira, Takashi; Ishiguro, Eiji; Mashiko, Naoya.

Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018: Integrating People and Intelligent Systems. ed. / Waldemar Karwowski; Tareq Ahram. Springer Verlag, 2018. p. 646-651 (Advances in Intelligent Systems and Computing; Vol. 722).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Saito, D, Watanuki, K, Muramatsu, K, Kaede, K, Tasaki, M, Kanahira, T, Ishiguro, E & Mashiko, N 2018, Evaluation of legibility and visual fatigue caused by luminescent text displays. in W Karwowski & T Ahram (eds), Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018: Integrating People and Intelligent Systems. Advances in Intelligent Systems and Computing, vol. 722, Springer Verlag, pp. 646-651, 1st International Conference on Intelligent Human Systems Integration: Integrating People and Intelligent Systems, IHSI 2018, Dubai, United Arab Emirates, 18/1/7. https://doi.org/10.1007/978-3-319-73888-8_100

Saito D, Watanuki K, Muramatsu K, Kaede K, Tasaki M, Kanahira T et al. Evaluation of legibility and visual fatigue caused by luminescent text displays. In Karwowski W, Ahram T, editors, Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018: Integrating People and Intelligent Systems. Springer Verlag. 2018. p. 646-651. (Advances in Intelligent Systems and Computing). https://doi.org/10.1007/978-3-319-73888-8_100

Saito, Daiki ; Watanuki, Keiichi ; Muramatsu, Keiichi ; Kaede, Kazunori ; Tasaki, Masutsugu ; Kanahira, Takashi ; Ishiguro, Eiji ; Mashiko, Naoya. / Evaluation of legibility and visual fatigue caused by luminescent text displays. Intelligent Human Systems Integration - Proceedings of the 1st International Conference on Intelligent Human Systems Integration IHSI 2018: Integrating People and Intelligent Systems. editor / Waldemar Karwowski ; Tareq Ahram. Springer Verlag, 2018. pp. 646-651 (Advances in Intelligent Systems and Computing).

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AB - Light-emitting diodes (LEDs) are widely used for backlighting text indicators in vehicles. It is desirable that such text indicators have high legibility and low fatigue-inducing qualities. Suitable spectral distributions for text presentation in vehicles have not yet been clarified. This study examined legibility and fatigue when participants read Japanese sentences presented through backlight emission for 10, min in a dark room. The backlight indicators employed four type of white LEDs. The participants were asked to answer questionnaires to evaluate legibility and fatigue. Moreover, the critical fusion frequency and brain activity were measured to evaluate fatigue objectively. The questionnaire results show that all colored backlighting displayed almost an equal legibility. The overall result suggests that participants were most and least fatigued when viewing text illuminated by high color-rending and greenish white backlighting, respectively. Thus, fatigue can be reduced using LEDs with different spectral distributions.

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