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3전극형 전자종이 디스플레이에서 하부전극 간격이 패널의 광특성에 미치는 영향
이상일,홍연찬,김영조,Lee, Sang-il,Hong, Youn-Chan,Kim, Young-cho 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.4
A three-electrode type reflective display (electronic paper) is designed to apply an independent electric field to each three electrodes of the cell including two electric-type of particles and electrically neutral color fluid, so single color realization is possible. In particular, the movement of particles and optical properties are decided by the electric field between two electrodes on the lower substrate. So, the effect of electric field by the distance between two electrodes on the lower substrate is studied with electrode spacing with $10{\mu}m$, $15{\mu}m$, $20{\mu}m$, and $25{\mu}m$. By our experimentation, the driving voltage induces more reliable movement of charged particles and the optical properties as compared with the threshold voltage. We ascertain the single color realization and non-inverted particle separation is possible. So the more desirable optical properties are observed in case of the short electrode like $10{\mu}m$.
3전극형 전자종이 디스플레이의 전자잉크 주입 방법에 따른 광학 특성 분석
이상일,홍연찬,김영조,Lee, Sang-Il,Hong, Youn-Chan,Kim, Young-Cho 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.3
An electronic paper display was fabricated by injecting electronic ink, including white and black particles coated by positive and negative charge control agents (CCA), respectively, into closed cells surrounded by micro-barriers. These two types of charged, colored particles are easily damaged or their charging value can be changed by the injection process; therefore, the electrical and optical properties of the image panel fabricated by the injection method were estimated in this study. The active particle-loading method, proposed as a new electronic ink injection process, was applied, and the electro-optical properties of the resulting three-electrode-type e-paper image panel were analyzed. The reflection rate of the white image-panel fabricated with our new injection method was 24.7%, while that of the same panel fabricated with a previously reported injection method was 19.8%. In addition, the response time was improved by about five times compared to those reported in other publications.
3전극형 반사형 디스플레이에서 패키징 방법에 의한 광특성 개선에 관한 연구
박상현,김영조,Park, Sang-Hyun,Kim, Young-Cho 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.3
In 3 electrode reflective displays using a plastic substrate, unstable packaging induces particle clumping and optical degradation due to external air inflow and electronic ink evaporation. In this work, we fabricate 3 electrode electronic paper using glass wafer, ITO/plastic film, and ITO/glass/gas barrier film as an upper substrate after injecting electronic ink onto the lower substrate. Then, we studied its properties. After operating under stress conditions for 336 hours at $85^{\circ}C$ and 75% humidity, the reflectivity of driven e-paper panels with white color was 25.5% for the panels using glass wafer, 22.5% for plastic film including a gas barrier layer, and 16% for plastic film only. From these optical properties, we conclude that gas barrier film improves upper film isolation as a desirable packaging method.
송현직(Hyun-Jig Song) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.4
In order to develope high performance ozonizer system, silent discharge of a new type ozonizer(SDTO) has been designed and manufactured. SDTO is equipped with three electrodes(central, internal and external electrodes), and it is composed of double gaps(gap between central electrode and internal electrode, gap between internal electrode and external electrode). Ozone is generated by overlapping silent discharge, which is respectively came from double gaps. This paper describes the following two characteristics : ① The characteristics of discharge with variation of output voltage of AC H.V source and quality of supplied gas ② The characteristics of ozone generation with variation of quality of supplied gas, discharge power and operating number. As a result, the maximum ozone concentration, generation, and yield can be obtained 20,187ppm, 13.7g/h and 350.8g/kwh respectively.