• Title/Summary/Keyword: Telecommunications

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A 2' QCIF Flexible OTFT driven AM-OLED Display

  • Suh, Kyung-Soo;You, In-Kyu;Kang, Seung-Youl;Ahn, Seong-Deok;Oh, Ji-Young;Kim, Gi-Hyun;Baek, Kyu-Ha;Kim, Chul-Am;Hwang, Chi-Sun;KoPark, Sang-Hee;Yang, Yong-Suk;Chung, Sung-Mook;Lee, Jeong-Ik;Do, Lee-Mi;Chu, Hye-Yong;Kang, Kwang-Yong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.181-185
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    • 2006
  • The flexible 2-inch AMOLED with $176{\times}144$ pixels has been demonstrated using top emission OLED driven by organic thin film transistors (OTFTs). For the development of AMOLED display on plastic substrate, we have developed several integration and unit process technologies. Through the optimization of the process based on plastic substrate, OTFT backplane with 2 transistors and 1 capacitor in a pixel has been fabricated and integrated with top emission OLED. The active addressing by OTFT driving circuit has been achieved and green light with 15 $cd/m^2$ at 15V has been observed.

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Development of flexible 3.5' QCIF (176 X144 pixels) OTFT driven OLED;Integration technologies compatible with normal semiconductor processes

  • Kang, Seung-Youl;Ahn, Seong Deok;Oh, Ji-Young;Kim, Gi-Hyun;Koo, Jae Bon;You, In-Kyu;Kim, Chul-Am;Hwang, Chi-Sun;KoPark, Sang-Hee;Yang, Yong-Suk;Chung, Sung-Mook;Lee, Jeong-Ik;Chu, Hye-Yong;Suh, Kyung-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08a
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    • pp.62-65
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    • 2007
  • Conventional semiconductor processes have been utilized to fabricate 3.5-inch OTFT-driven OLEDs with a resolution of $176\;{\times}\;144$ pixels on plastic substrates. By using a PC-OVD method to deposit a pentacene layer and optimizing patterning and the following processes, we could complete a uniform and reliable integration procedure for an active matrix organic light emitting devices on a plastic substrate. The technical importance of ours is the applicability of conventional semiconductor process to organic materials on plastic substrates. Although there are many hurdles to overcome, our approach and technical improvements are proved to be applicable to plastic electronics.

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Apparatus and Method of Visual Lifetime Measurement of Organic Light Emitting Devices

  • Yang, Yong-Suk;Chu, Hye-Yong;Oh, Ji-Young;Lee, Jeong-Ik;Kim, Gi-Heon;KoPark, Sang-He;Hwang, Chi-Sun;Kim, Mi-Kyung;Do, Lee-Mi;Chung, Sung-Mook;Ko, Young-Wook
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.623-624
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    • 2004
  • The coating and estimation of gas and moisture barriers on polymer and glass substrates are receiving very much attention in passivation of organic light emitting devices (OLEDs). In this study, the encapsulation and lifetime measurement techniques of OLEDs were presented. The degradation mechanisms of bare and encapsulated OLEDs were investigated by the visual lifetime measurement (VLM) system with the parameters such as a pixel luminance(L), a luminance rms roughness(dL), a brightness area ratio(R), an edge degradation depth(D), etc.

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Recent Progress in Organic Thin Film Transistor on the Plastic Substrates

  • Suh, Kyung-Soo;Kang, Seung-Youl;Ahn, Seong-Deok;Oh, Ji-Young;You, In-Kyu;Kim, Gi-Hyun;Baek, Kyu-Ha;Kim, Chul-Am;Hwang, Chi-Sun;KoPark, Sang-Hee;Yang, Yong-Suk;Chung, Sung-Mook;Lee, Jeong-Ik;Do, Lee-Mi;Chu, Hye-Yong;Kang, Kwang-Yong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.61-63
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    • 2005
  • Pentacene based OTFT on PC and PES plastic substrates have been fabricated in a scale of 5 inches. We could get a small OTFT device enough to be applicable for AMOLED by acquiring the at least misalignment margin through a contact aligner. And also we could find out the degradation of device parameter through the integration processes and improve the properties by using a buffer layer as an etch stopper in an active patterning. Through these, the mobility of device is more than about $0.2cm^2/Vs$ and $I_{on}/I_{off}$ is higher than $10^5$.

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Scalable Network Architecture for Flow-Based Traffic Control

  • Song, Jong-Tae;Lee, Soon-Seok;Kang, Kug-Chang;Park, No-Ik;Park, Heuk;Yoon, Sung-Hyun;Chun, Kyung-Gyu;Chang, Mi-Young;Joung, Jin-Oo;Kim, Young-Sun
    • ETRI Journal
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    • v.30 no.2
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    • pp.205-215
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    • 2008
  • Many control schemes have been proposed for flow-level traffic control. However, flow-level traffic control is implemented only in limited areas such as traffic monitoring and traffic control at edge nodes. No clear solution for end-to-end architecture has been proposed. Scalability and the lack of a business model are major problems for deploying end-to-end flow-level control architecture. This paper introduces an end-to-end transport architecture and a scalable control mechanism to support the various flow-level QoS requests from applications.

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