2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)最新文献_第4页

Design and Implementation of Dynamic Regulation Function of Artificial Light Plant Lighting System 人工光源植物照明系统动态调节功能的设计与实现

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675190

Lyu Tiangang, Kuangang Fan, Lyu Henan, Wang Yuefei, Liu Xiujuan

{"title":"Design and Implementation of Dynamic Regulation Function of Artificial Light Plant Lighting System","authors":"Lyu Tiangang, Kuangang Fan, Lyu Henan, Wang Yuefei, Liu Xiujuan","doi":"10.1109/SSLChinaIFWS54608.2021.9675190","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675190","url":null,"abstract":"This paper focuses on the design and implementation of dynamic light regulation function of plant light system under intelligent plant culture control system based on industrial Internet of Things technology. The plant lighting system consists of several groups of LED light sources with different wavelengths, multi-channel NUMERICAL control power management IC and peripheral circuits, which together with other terminal equipment, terminal master control board, gateway, server, application end Web/APP, constitute the plant culture system. This project provides an equipment and control method for plant cultivation in a fully artificial environment. The method can achieve precise and dynamic control of the irradiance, photoperiod, and spectral distribution of the LED lighting system according to plant growth cycle information and user needs. The feature of this technology is that it can highly simulate the changing laws of the light environment in nature, and it can also customize the light formula according to plant preferences.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"3 1","pages":"211-215"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80059902","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

High Quality AlGaN/GaN HEMT Homo-epitaxy on 4-inch Homebred GaN Substrate by MOCVD 利用MOCVD技术在4英寸自制GaN衬底上实现高质量的AlGaN/GaN HEMT同外延

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675273

N. Gao, Y. L. Fang, Z. R. Zhang, J. Y. Yin, B. Wang, J. Li, W. L. Lu, C. L. Niu, H. Chen

引用次数: 0

Appropriate Screen Brightness for Ambient Lighting Illuminance 适合环境照明照度的屏幕亮度

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675263

Shanshan Zeng, Wentao Hao, Ya Guo, Guanheng Li, Wenxue Li, Caiqin Chen, Zuqiang Zhang, Deshun Qu, Shengli Zhang, Xingxing Qin, Jianqi Cai

{"title":"Appropriate Screen Brightness for Ambient Lighting Illuminance","authors":"Shanshan Zeng, Wentao Hao, Ya Guo, Guanheng Li, Wenxue Li, Caiqin Chen, Zuqiang Zhang, Deshun Qu, Shengli Zhang, Xingxing Qin, Jianqi Cai","doi":"10.1109/SSLChinaIFWS54608.2021.9675263","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675263","url":null,"abstract":"The popularization of display technology resulted in significant conveniences yet several drawbacks meanwhile. Threats to visual health caused by displaying screen were generally from mismatch between screen brightness and ambient lighting illuminance. Recent researchers on smartphones developed various methods to automatically modulate the screen brightness dependent on ambient lighting illuminance, whereas the modulated screen brightness values were perceived to be lower than needed. In this study, we compared the effects among various smartphone-brightness values on ocular physiological parameters in different ambient lighting illuminance values. We found that the automatically-modulated brightness of smartphones were improper for human eyes due to the lack of enough photons to activate necessary ocular contrast, and the brightness values should be increased by 10-20% to protect ocular function and keep visual health.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"46 1","pages":"162-164"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77275835","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

Monolithic Comparators using E/D-mode AlGaN/GaN MIS-HEMTs for High-temperature Applications 高温应用中使用E/ d模式AlGaN/GaN mishemt的单片比较器

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675215

Weisheng Wang, Ang Li, Miao Cui, H. Wen, Wen Liu

引用次数: 1

Development of high-voltage SiC Power Electronic Devices 高压SiC电力电子器件的发展

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675164

L. Sang, Wenting Zhang, Yunlai An, Liang Wang, Yanfang Chen, Jialin Li, Yujie Du, Rui Liu, X. Niu, Xiaolei Yang, Shiyan Li, Gang Chen, Xinling Tang, J. Wu, Fei Yang

引用次数: 0

Self-Frequency-Doubled Crystal Laser Light Sources and its Potential Applications in Automotive Lighting 自倍频晶体激光光源及其在汽车照明中的潜在应用

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675198

Ru Li, Xianliang Zheng, Haohai Yu, Zhen Long, Zhanggui Hu, Zhaohui Li, Jin Chang, Limin Huang, Liwei Yin

{"title":"Self-Frequency-Doubled Crystal Laser Light Sources and its Potential Applications in Automotive Lighting","authors":"Ru Li, Xianliang Zheng, Haohai Yu, Zhen Long, Zhanggui Hu, Zhaohui Li, Jin Chang, Limin Huang, Liwei Yin","doi":"10.1109/SSLChinaIFWS54608.2021.9675198","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675198","url":null,"abstract":"With the rapid development of informatization and intelligentialize of vehicles, solid-state-lighting is becoming more and more important in automotive lighting. LED still have some problems in lighting, such as low light intensity, thermal attenuation and short projecting distance. Laser lighting is becoming one of substitutes as the light source for automotive lighting. Here, laser light sources based on self-frequency-doubled (SFD) crystal were investigated. Especially for white laser light source, a mockup was made to verify the realistic of this approach, and the test results showed that the SFD white laser light source, combined with a blue laser diode and an SFD amber laser light source, was obtained successfully. The tested white laser light source's proportion of blue and amber is 1 (440nm): 1.7 (570nm), with a total output optical power 4W. In addition, a road projection lamp based on SFD green laser, compared with LED light source at same output optical power level, mock-up sample's were made and tested to further verify the feasibility of SFD laser applied on automotive lighting, and the optical simulation and test results were also demonstrated. Results show that SFD laser light source will play an important role in the future lighting market for automotive.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"26 1","pages":"122-124"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90720294","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

Research and Application of Double-sided Thermal Resistance Test Method for Press-pack IGBT 压包式IGBT双面热阻测试方法的研究与应用

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675264

Yihui Zhang, Pengfei Wu, M. Cui, Zhongyuan Chen, Yinghan Liu, Jinyuan Li

{"title":"Research and Application of Double-sided Thermal Resistance Test Method for Press-pack IGBT","authors":"Yihui Zhang, Pengfei Wu, M. Cui, Zhongyuan Chen, Yinghan Liu, Jinyuan Li","doi":"10.1109/SSLChinaIFWS54608.2021.9675264","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675264","url":null,"abstract":"With the acceleration of energy transformation and the development of power grid equipment technology, the capacity and voltage level of flexible DC transmission project are gradually improved. There is an urgent need for the support of power semiconductor IGBT with higher voltage level and larger capacity. As the press-pack IGBT has two heat dissipation surfaces, and the heat dissipation power of each heat dissipation surface is determined by the proportion of double-sided thermal resistance, the existing test methods cannot determine the heat dissipation power of both sides before obtaining the thermal resistance value. Firstly, this paper summarizes the existing welding and press-pack thermal resistance test methods, analyzes the composition of press-pack IGBT double-sided thermal resistance, puts forward the thermal resistance test method based on the equivalent measurement of press-pack IGBT double-sided heat flux, realizes the synchronous measurement of asymmetric press-pack IGBT double-sided thermal resistance, and studies the influence law of pressure on IGBT thermal resistance characteristics based on the test platform.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"217 1","pages":"235-238"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76981084","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

Comparison experiment of Parasitic Inductance Extraction of power module based on ANSYS Q3D software 基于ANSYS Q3D软件的功率模块寄生电感提取比较实验

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675224

Kailin Zhang, M. Cai, Minghui Yun, Lei Song, Daoguo Yang

{"title":"Comparison experiment of Parasitic Inductance Extraction of power module based on ANSYS Q3D software","authors":"Kailin Zhang, M. Cai, Minghui Yun, Lei Song, Daoguo Yang","doi":"10.1109/SSLChinaIFWS54608.2021.9675224","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675224","url":null,"abstract":"SiC power devices are widely used in high frequency and high voltage circuits because of their excellent properties such as high breakdown field strength and high thermal conductivity. However, their packaging and loop stray inductance affect the work of the devices seriously in high frequency and high voltage environment seriously. The main effects are switching oscillation, EMI, additional power loss and equipment stress. In this paper, the parallel SiC Power Module (SKM200GB12F4SiC3) is analyzed by using ANSYS Q3D software. Based on the two port scattering (S) parameter's test method, the parasitic inductance of each port is extracted and compared with the experimental results. The influence of the physical structure on the parasitic inductance of SiC Power module is analyzed. By comparing the experimental data with the simulation data, it is concluded that the parasitic inductance of the grid of the lower half bridge is more than twice as much as that of the upper half bridge, which is the maximum of all parasitic inductance parameters. It is the main factor affecting the parasitic parameters. The method to improve the parasitic parameters of the module is given.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"33 1","pages":"58-60"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77281588","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

Histological Data-Based Examination of the Safety of Anti-microbial Light Therapies 基于组织学数据的抗微生物光疗法安全性检验

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675249

Yun Zhao, Jianfei Dong

{"title":"Histological Data-Based Examination of the Safety of Anti-microbial Light Therapies","authors":"Yun Zhao, Jianfei Dong","doi":"10.1109/SSLChinaIFWS54608.2021.9675249","DOIUrl":"https://doi.org/10.1109/SSLChinaIFWS54608.2021.9675249","url":null,"abstract":"Anti-microbial light therapies have been proven to be effective in treating various diseases caused by microbial infection. The existing literature has been mainly devoted to studying the effect of various light dosages on inhibiting microbes. Studying the safety of light therapies to normal host cells, especially via in vivo experiments, has not yet attracted much attention. In this work, we extend our previous study on evaluating the treatment efficacy based on histological image data to the examination of the treatment safety by blue LED light. Specifically, the anti-microbial light experiments using 415-nm-wavelength LED light were performed on BALB/c mice, whose skin was infected by Candida albicans (C. albicans), which is a common pathogenic fungal species. The tissue sections of the experimental animals were processed by TUNEL staining for examining the treatment safety. The apoptosis rates of the epithelial cells before and after the light treatment were extracted from the histological data, and tested. The results showed that the host cells were not significantly inhibited by the light, whose dosage was enough to significantly inhibit the fungi. Moreover, to discover the cytotoxic effect of the light on the fungal cells, the induced intracellular reactive oxygen species (ROS) was also measured. The increase in the ROS levels due to the light stimulation was found to be significant, as tested against those in the control group that was not treated by the light. Overall, the results verified the safety of the anti-microbial therapy by the 415-nm-wavelength LED light.","PeriodicalId":6816,"journal":{"name":"2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS)","volume":"102 1","pages":"169-172"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78902033","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

Human perception and preferences of evening office lighting in terms of the LED spectrum 人类对夜间办公照明的感知和偏好

2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS) Pub Date : 2021-12-06 DOI: 10.1109/SSLChinaIFWS54608.2021.9675244

Congshan Dai, Nuoyi Li, Ali Hassan Shah, Yandan Lin

引用次数: 1