Dynamically Tuning the Correlated Color Temperature of White Light-Emitting Electrochemical Cells with Electrochromic Filters

• Main Authors: Chiou, Bo-Ruei, 邱柏瑞
• Other Authors: Su, Hai-Ching
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/xf2bxm

碩士 === 國立交通大學 === 照明與能源光電研究所 === 105 === Recently, white solid-state LECs have attracted intense attention since they exhibit advantages such as low-voltage operation, compatibility with solution processes and employing inert cathode metals. Since different correlated color temperatures (CCTs) of background illumination are necessary for various lighting applications, a real-time tunable CCT of white LECs would be highly desired in modern smart lighting systems. In this work, a widely and dynamically tuning CCT (>10000 K) of white LEC is demonstrated by employing an electrochromic device (ECD) as a real-time controllable color filter. By increasing the applied bias on the ECD to attenuate more the red parts of white EL from the white LEC, the LEC-based white light source becomes more bluish and, in consequence, shows higher CCT. This proposed LEC-based white light source with the characteristics of wide CCT range and real-time tunability is suitable for most lighting applications and modern smart lighting systems.