Design of a highly efficient LED-based bicycle head lamp with additional ground illumination

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103205

Title:	Design of a highly efficient LED-based bicycle head lamp with additional ground illumination
Authors:	孫慶成;Cai, J-Y;Lo, Y-C;Feng, S-T;Sun, C-C
Contributors:	理學院光電科學與工程學系
Keywords:	Bicycles;Diodes;Emittance;Grounds;Illuminance;Illumination;Lamps;Light emitting diodes;Lighting systems;Luminosity;White light
Date:	2014-01-01
Issue Date:	2026-04-23 11:25:35 (UTC+8)
Publisher:	SAGE Publications Ltd;London, England: SAGE Publications
Abstract:	摘要： A novel design of phosphor-converted, white light emitting diode-based bicycle head lamp producing sufficient illuminance on the target to meet the K-mark regulations and additional illumination on the ground is proposed and demonstrated. The phosphor-converted, white light emitting diode has a power demand of 2.5 W, while the novel design offers a maximum illuminance of 30 lux at the HV point, and illuminances larger than 3 lux across the first 7 m on the ground. The optical utilisation factor for the target illumination is 30% and for the ground is 44%. It means that around 74% of the luminous flux emitted by the phosphor-converted, white, light emitting diodes is utilised. This novel and highly efficient bicycle head lamp provides safer illumination for bicycle riders. 出版者： London, England: SAGE Publications 出版日期： 2014-12-01 出處： Lighting research & technology (London, England : 2001), 2014-12, Vol.46 (6), p.747-753 資源來源： EBSCOhost Academic Search Premier 版權： The Chartered Institution of Building Services Engineers 2014 版權： SAGE Publications © Dec 2014 識別號： ISSN: 1477-1535 識別號： EISSN: 1477-0938 識別號： DOI: 10.1177/1477153513520318
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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