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Paper Abstract and Keywords
Presentation 2017-07-29 10:50
Relation with Human Visual Recognition and Illumination Intensity Based on Duty Ratio of Pulse Driven LED
Masaki Miyatani, Hiroki Yamamoto, Mineyuki Nishio (NIT., Anan College), Nobutomo Uehara (NIT., JAPAN), Masaru Kamano, Emiko Yasuno (NIT., Anan College), Yohsuke Kinouchi (Tokushima Univ.) BioX2017-13 MBE2017-22
Abstract (in Japanese) (See Japanese page) 
(in English) LED lightning with pulsed width modulation (PWM) method is growing in use of modern electronic devices. This method can control brightness of pulsed LED lights by changing duty ratio of lights-on and lights-out time. In this study, visual recognition measurements of human eyes were conducted with various duty ratios of pulsed LED lights over multiple wavelengths. Some results of visual recognition measurements revealed false recognitions that the pulsed lights had same brightness with DC or were brighter than the DC light. Although the emitting time of pulsed light with less than 100% duty ratio of PWM is shorter than that of DC light, the number of the false recognitions increased in proportion to the duty ratio of pulsed light. It varied with wavelengths of lights that a threshold of averaged duty ratio recognized as same brightness with DC lights.
Keyword (in Japanese) (See Japanese page) 
(in English) LED / Drive system / DC driven / Pulse driven / Duty ratio / Visual recognition / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 165, MBE2017-22, pp. 21-24, July 2017.
Paper # MBE2017-22 
Date of Issue 2017-07-22 (BioX, MBE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee MBE BioX  
Conference Date 2017-07-29 - 2017-07-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokushima University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ME, Biometrics, general 
Paper Information
Registration To MBE 
Conference Code 2017-07-MBE-BioX 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Relation with Human Visual Recognition and Illumination Intensity Based on Duty Ratio of Pulse Driven LED 
Sub Title (in English)  
Keyword(1) LED  
Keyword(2) Drive system  
Keyword(3) DC driven  
Keyword(4) Pulse driven  
Keyword(5) Duty ratio  
Keyword(6) Visual recognition  
Keyword(7)  
Keyword(8)  
1st Author's Name Masaki Miyatani  
1st Author's Affiliation National Institute of Technology, Anan College (NIT., Anan College)
2nd Author's Name Hiroki Yamamoto  
2nd Author's Affiliation National Institute of Technology, Anan College (NIT., Anan College)
3rd Author's Name Mineyuki Nishio  
3rd Author's Affiliation National Institute of Technology, Anan College (NIT., Anan College)
4th Author's Name Nobutomo Uehara  
4th Author's Affiliation National Institute of Technology, JAPAN (NIT., JAPAN)
5th Author's Name Masaru Kamano  
5th Author's Affiliation National Institute of Technology, Anan College (NIT., Anan College)
6th Author's Name Emiko Yasuno  
6th Author's Affiliation National Institute of Technology, Anan College (NIT., Anan College)
7th Author's Name Yohsuke Kinouchi  
7th Author's Affiliation Tokushima University (Tokushima Univ.)
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Speaker Author-1 
Date Time 2017-07-29 10:50:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # BioX2017-13, MBE2017-22 
Volume (vol) vol.117 
Number (no) no.164(BioX), no.165(MBE) 
Page pp.21-24 
#Pages
Date of Issue 2017-07-22 (BioX, MBE) 


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