Journal of Science and Technology in Lighting最新文献_第3页

Performance Comparison of Various Whiteness Formulas Based on Visual Evaluation Experiments 基于视觉评价实验的各种白度公式性能比较

Journal of Science and Technology in Lighting Pub Date : 2019-03-31 DOI: 10.2150/jstl.ieij180000631

I. Katayama

{"title":"Performance Comparison of Various Whiteness Formulas Based on Visual Evaluation Experiments","authors":"I. Katayama","doi":"10.2150/jstl.ieij180000631","DOIUrl":"https://doi.org/10.2150/jstl.ieij180000631","url":null,"abstract":"The Technical Committee TC 1-95 established in the International Commission on Illumination (CIE) is currently active in improving the CIE whiteness formula to extend the scope of the applicability of lighting conditions other than the standard illuminant D65. However, it is important to examine whether or not the CIE whiteness formula is signiﬁcantly superior to other whiteness formulas under the standard illuminant D65. In this study, we conducted comparisons of the predictive performance of 19 whiteness formulas, including the CIE whiteness formula. These comparisons were based on the results of nine visual evaluation experiments that were conducted by four research groups. The results of the analysis clearly demonstrated that, compared to the CIE whiteness formula, the Uchida and Grum whiteness formulas had better outcomes. The predictive performance of the CIE whiteness formula was ranked 11th among the 19 whiteness formulas. This low predictive performance is due to the structure of the CIE whiteness formula, which does not have a penalty term. We also found that the structure of the Grum whiteness formula was simpler and had better predictive performance than the Uchida whiteness formula. Thus, we conclude that the Grum whiteness formula is superior to the Uchida whiteness formula.","PeriodicalId":328826,"journal":{"name":"Journal of Science and Technology in Lighting","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117307889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Self-consistent Estimation of Dissipated Power Allocation of OLED in view of Electromagnetic Wave Mode Analysis 基于电磁波模式分析的OLED耗散功率分配自洽估计

Journal of Science and Technology in Lighting Pub Date : 2019-03-31 DOI: 10.2150/jstl.ieij190000634

Y. Ishido, N. Tanigaki

{"title":"Self-consistent Estimation of Dissipated Power Allocation of OLED in view of Electromagnetic Wave Mode Analysis","authors":"Y. Ishido, N. Tanigaki","doi":"10.2150/jstl.ieij190000634","DOIUrl":"https://doi.org/10.2150/jstl.ieij190000634","url":null,"abstract":"An alternative estimation of the dissipated power allocation in OLED based on the analysis of the transverse propagating electromagnetic (EM) waves along the layers of the OLED is proposed. The dissipated power mode fraction has been conventionally defined by dividing the normalized in-plane wavevector with the cut-off of the transvers propagation, which is equal to the refractive index of the each layer, according to the ray-optical sense. Instead, we adopt the propagating EM eigenmode in OLED, physically confining a piece of the power in the thin film layers. The spectral integral is described as the extension of Cauchy’s principal value integral at the eigenvalue of the in-plane wavevector of the EM propagating mode along the layers; and is derived to the product of the peak value of the spectral distribution and the imaginary part of the eigenvalue of the in-plane wavevector multiplied by π, with the aid of the selfconsistent scheme. For the simple model of two layers between semi-infinite substrate and metal, the present estimation is closer than the conventional one to the quantitative grasping the dipole radiation’s allocation into the extraction and the confinement.","PeriodicalId":328826,"journal":{"name":"Journal of Science and Technology in Lighting","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121164871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lighting of Kochi Castle Museum of History 高知城堡历史博物馆的照明

Journal of Science and Technology in Lighting Pub Date : 2019-03-31 DOI: 10.2150/jstl.ieij19a000002

Hiroyasu Yoshino

引用次数: 0

Belief Expression of the Chairperson Assumption of the IEIJ IEIJ主席就职的信念表达

Journal of Science and Technology in Lighting Pub Date : 2019-03-31 DOI: 10.2150/jstl.ieij19a000004

Hisanori Toyoshima

引用次数: 0

Lighting of Panasonic Stadium Suita 松下体育馆灯饰

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ18A000002

Daisuke Hara, Hiroyasu Sato

引用次数: 0

The Protective Effect of Blue Light Cutting Particles Mixed Optical Material against Blue LED Light-Induced Photoreceptor and Cornea Cell Death 蓝光切割颗粒混合光学材料对蓝光LED光致感光细胞和角膜细胞死亡的保护作用

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ180000625

Tomohiro Yako, Yoshiki Kuse, Shinsuke Nakamura, M. Shimazawa, T. Motomura, H. Hara

{"title":"The Protective Effect of Blue Light Cutting Particles Mixed Optical Material against Blue LED Light-Induced Photoreceptor and Cornea Cell Death","authors":"Tomohiro Yako, Yoshiki Kuse, Shinsuke Nakamura, M. Shimazawa, T. Motomura, H. Hara","doi":"10.2150/JSTL.IEIJ180000625","DOIUrl":"https://doi.org/10.2150/JSTL.IEIJ180000625","url":null,"abstract":"Blue light emitting diode (LED) light is being used various devices for recent decades. Blue LED light has the 450–500 nm wavelengths, and high photon energy compared with green or red LED light. It is known that the exposure to blue LED light causes retinal photoreceptor cells damage. It is unknown whether the blue LED light cut particle containing lens has a protective effect against blue LED light-induced cell damage although the absorbance by colored lens shows a protective effect. Thus, the purpose of this study was to reveal that the protective effect of blue LED light cutting particle containing lens against photoreceptor and corneal epithelial cell damage induced by blue LED light exposure. We irradiated blue LED light to the mouse photoreceptor cells and human cornea epithelial cells with or without lens. The lens containing about one third blue LED light cutting particle (TECHPOLYMER) decreased production of reactive oxygen species and improved cell death rate and cell viability rate. These findings show that TECHPOLYMER containing lens may protect photoreceptor and cornea cells by reducing of reactive","PeriodicalId":328826,"journal":{"name":"Journal of Science and Technology in Lighting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115404944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landscape and Commercial Facility Lighting at HIRAKATA T-SITE Façade, Hirakatashi Station, Osaka 大阪平隆站，平田T-SITE farade的景观和商业设施照明

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ18A000001

Satoshi Uchihara

引用次数: 0

Becoming an Honorary Member of the Illuminating Engineering Institute of Japan 成为日本照明工程学会名誉会员

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ18A000004

S. Okabayashi

引用次数: 0

Importance of a Vector Component and the Vertical Illuminance in Road Lighting for the Obstacle Visibility of the Road 道路照明中矢量分量和垂直照度对道路障碍物可见性的重要性

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ140000551

M. Kimura, Yoshifumi Hamada, Y. Ikeda, H. Motomura, M. Jinno

引用次数: 3

Visibility Improvement in Expressway Tunnels by Optimizing the Color Temperature and Light Distribution of the Pulse-operated LED Luminaires 脉冲LED灯具色温与配光优化提高高速公路隧道能见度

Journal of Science and Technology in Lighting Pub Date : 2019-03-27 DOI: 10.2150/JSTL.IEIJ170000620

Kenji Miyake, S. Ota, Daiki Shigematsu, Koji Ohkusa, Y. Ikeda, M. Jinno

{"title":"Visibility Improvement in Expressway Tunnels by Optimizing the Color Temperature and Light Distribution of the Pulse-operated LED Luminaires","authors":"Kenji Miyake, S. Ota, Daiki Shigematsu, Koji Ohkusa, Y. Ikeda, M. Jinno","doi":"10.2150/JSTL.IEIJ170000620","DOIUrl":"https://doi.org/10.2150/JSTL.IEIJ170000620","url":null,"abstract":"The presence of obstacles on expressways often results in major traffic accidents. Therefore, ensuring the visibility of obstacles on roads is an important factor for maintaining a safe and comfortable visual driving environment. The visibility of obstacles on road, especially in tunnels, is related to the lighting environment. In this study, we have proposed two lighting-control methods and evaluated the visibility of obstacles under a combination of light-distribution control and lighting-time control and a combination of light-distribution control and color-temperature control. Further, we evaluated the effectiveness of these two lighting-control methods and obtained good visibility by combining the pro-beam lighting operated using direct current (DC) and symmetric lighting operated by pulses having a frequency of 60 Hz and a duty ratio of 50%. The visibility can be effectively improved by increasing the luminous contrast between the background road surface and the object. In addition, when lighting-time control was applied, temporal luminance contrast was achieved, and the perceived luminance was enhanced by the pulse (Broca– Sulzer effect), thereby improving the visibility. Further, the visibility can be improved by changing the color temperature with the light-distribution angle because of the difference in chromaticity between the background road surface and the object.","PeriodicalId":328826,"journal":{"name":"Journal of Science and Technology in Lighting","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132263432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2