• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 학술대회 및 기술세미나 논문집 디스플레이 광소자
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• pp.47-48
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• 2006

Electrowetting phenomenon is applied in the various field of technology. One of that is electrowetting display as a paper like electronic paper. Fast response and easy to express a color is goodness. In spite of that, the oil movement of the electrowetting display is irregular. So it doesn't look like uniform. Because of the above reason, electrowetting display using patterned electrode is made and the characteristic of oil movement is observed. Electrode and polymer wall is patterned by photo-lithography. We analyze the oil movement according to the variation of size and the position of etched electrode area.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.495-496
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• 2006

Electrowetting phenomenon is applied in the various field of technology. One of that is electrowetting display as a paper like electronic paper. Fast response and easy to express a color is goodness. In spite of that, the oil movement of the electrowetting display is irregular. So it doesn't look like uniform. Because of above reason, electrowetting display using patterned electrode is made and the characteristic of oil movement is observed. Electrode and polymer wall is patterned by photo-lithography. We analyze the oil movement according to the variation of size and the position of etched electrode area.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1757-1760
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• 2007

Moving a droplet by electrowetting is the basis of our novel displays. This enables mechanical bistable and high reflective monochrome as well as color systems. Since no high temperature process is required, plastic substrates can be used. Our prototypes show promising performance in terms of a wide temperature range, contrast ratio and color.

• 한국컴퓨터정보학회논문지
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• 제17권9호
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• pp.149-156
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• 2012

본 논문에서는 전기습윤(Electrowetting) 디스플레이의 효율적인 생산을 위해 섬유형식의 전극들을 제안하고, 이러한 방법을 이용한 전기습윤 셀 구동형 플렉서블 디스플레이의 소스 드라이버 설계방법을 제안하였다. 전기습윤 셀 매트릭스는 임프린팅 방법에 의하여 PET 등의 Substrate 위에 구성하고 셀 매트릭스 사이의 간격에는 드라이버섬유, 습윤 전극섬유와 전도성 섬유를 가로와 세로로 배치하고, 교차점에는 전기적 접점을 구성하여 전기습윤 셀매트릭스가 구동되도록 하였다. 기존의 소스 드라이버에서는 각 채널당 R/2R방식의 DAC을 사용하므로 사용되는 소자의 수가 증가하여 집적도가 저하되는 단점이 있다. 따라서 본 논문에서는 채널당 소자의 수를 감소시켜 집적도를 높이고 비용을 절감할 수 있는 저 전력 소스 드라이버 설계방법을 제안하고 VHDL 프로그램을 이용한 시뮬레이션으로 타당성을 검증하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1240-1243
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• 2008

The 6- inch electrowetting display (EWD) can be successfully developed by ink jet printing (IJP) technique. Due to the drop-on-demand characteristic of IJP technology, colored oil can be precisely dosed into the unit pixel. Here, we present the active matrix EWD in this article. By adopting this technique to dose different colored oils, single layer Multi-color EWD without adopting color filter can be achieved in the future.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1337-1340
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• 2008

Since 2006, the Industrial Technology Research Institute and the University of Cincinnati have been jointly exploring approaches for high brightness flexible electrowetting displays (EWDs). Recently, ITRI demonstrated for the $1^{st}$ time a 6" AM-EWD reflective display panel. To create flexible AM-EWDs, Cincinnati has developed low-temperature processing and improved pixel structures.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 추계학술대회 논문집 Vol.19
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• pp.286-287
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• 2006

Electrowetting display (EWD) is one of the strong candidates for electronic paper like display (EPD). However, in the conventional EWD, the oil movement occurs in random direction so that we can observe irregular distribution of contracted oil in the operation. To realize colorful display and achieve a fast response time, oil movement in the pixel should be directed in a specific direction. In this paper, we report the result of oil contraction with specified direction which is achieved by patterned electrode. From the experiments, we find that the oil movement depends on the portion of etched electrode area and study other influencing factors of patterned electrode on the oil movement.

• Journal of Information Display
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• 제11권2호
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• pp.84-90
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• 2010

This paper presents the effects of a dielectric layer and an electrolyte on the driving performance of an electrowetting on dielectric (EWOD)-based liquid lens. The range of tunable focal length of the EWOD-based liquid lens was highly dependent on the conditions of the dielectric layer, which included an inorganic oxide layer and an organic hydrophobic layer. Moreover, experiments on the physical and optical durability of electrolyte by varying temperature conditions, were conducted and their results were discussed. Finally, the lens with a truncated-pyramid silicon cavity having a sidewall dielectrics and electrode was fabricated by anisotropic etching and other micro-electromechanical systems (MEMS) technologies in order to demonstrate its performance. The lens with $0.6-{\mu}m$-thick $SiO_2$ layer and 10 wt% LiCl-electrolyte exhibited brilliant focal-length tunability from infinity to 3.19 mm.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1537_1538
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• 2009

기존의 초소형 렌즈모듈들은 초점 거리 가변을 위한 구동장치가 필요하여 소형화 한계, 큰 전력소모, 부품의 기계적 결함 등 해결해야 할 부가적인 문제점들이 존재하였다. 액체렌즈는 이러한 문제를 해결할 수 있는 유력한 기술로 주목받고 있으며, 특히 부가적인 구동 장치가 필요없고 비교적 간단한 원리로 렌즈 곡률을 조절할 수 있는 일렉트로웨팅 기반의 액체렌즈는 초점 거리 조절 및 줌 조절이 필요한 휴대폰, 캡슐 내시경 등에 적용이 가능하다. 그러나 기존의 일렉트로웨팅 기반의 액체렌즈는 렌즈 캐비티의 크기에서 큰 단점이 있으며, 렌즈모듈구성 시에도 소형화하는데 한계가 존재하였다. 본 연구에서는 렌즈 캐비티를 MEMS 기술을 이용하여 실리콘 기판 상에 제작함으로써 구동회로의 집적이 가능한 액체렌즈를 제작하였다.

• 한국유체기계학회 논문집
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• 제18권6호
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• pp.27-30
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• 2015

In this study, we attempted to harvest energy using water droplet based on Reverse Electro Wetting On Dielectric (REWOD) phenomenon between water droplet and dielectric surface without external bias. REWOD device can be fabricated via simple coating process, which is highly economic and easy. We believe that our system is well-suited for IoT(Internet of Things) embedded electronics that require low but consistent electricity. Moreover, our device can be integrated with window to generate electricity upon raindrops.