• Title/Summary/Keyword: Electronic Engineering

검색결과 24,295건 처리시간 0.061초

The Prospect and Future of Li-ion Battery

  • Lee, Sung-Joon;Jeong, Seung-Hwan;You, Chung-Yeol;Soh, Dea-Wha;Hong, Sang-Jeen
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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    • pp.627-628
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    • 2005

  • In recent years, the rapid growth of portable electronic device market requires higher density characteristics of batteries. The speed at which portability and mobility is advancing hinges much on the battery. What is important is this energy source that engineers design handled devices around the battery, rather than the other way around. Much improvement has been made in reducing the power consumption of portable devices. Currently, the most popular secondary battery is Li-ion battery. Li-ion has won the limelight and become the most prominent battery. This paper reviews the prospect and future of the Li-ion battery.

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Liquid Crystal Alignment on the SiC Thin Film by the Ion Beam Exposure Method

  • Park, Chang-Joon;Hwang, Jeoung-Yeon;Kang, Hyung-Ku;Kim, Young-Hwan;Seo, Dae-Shik;Ahn, Han-Jin;Kim, Kyung-Chan;Kim, Jong-Bok;Baik, Hong-Koo
    • Transactions on Electrical and Electronic Materials
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    • 제6권1호
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    • pp.22-24
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    • 2005

  • We studied the nematic liquid crystal (NLC) aligning capabilities using the new alignment material of the SiC (Silicon Carbide) thin film. The SiC thin film exhibits good chemical and thermal stability. The good thermal and chemical stability makes SiC an attractive candidate for electronic applications. A vertical alignment of nematic liquid crystal by ion beam exposure on the SiC thin film surface was achieved. The about $87{\circ}$ of stable pretilt angle was achieved at the range from $30{\circ}$ to $45{\circ}$ of incident angle. The good LC alignment is maintained by the ion beam alignment method on the SiC thin film surface at high annealing temperatures up to $300{\circ}C$.

  • https://doi.org/10.4313/TEEM.2005.6.1.022 인용 PDF KSCI

Design of Fuzzy Scaling Gain Controller using Genetic Algorithm

  • Hyunseok Shin;Lee, Sungryul;Hyungjin Kang;Cheol Kwon;Park, Mignon
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
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    • pp.474-478
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    • 1998

  • This paper proposes a method which can resolve the problem of exisiting fuzzy PI controller using optimal scaling gains obtained by genetic algorithm. The new method adapt a fuzzy logic controller as a high level controller to perform scaling gain algorithm between two pre-determined sets.

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An integrated photodiode fabricated by low temperature poly-Si TFT process

  • Lee, Seung-Min;Kim, Dong-Lim;Jung, Tae-Hoon;Heo, Kon-Yi;Kim, Hyun-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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    • pp.1340-1343
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    • 2007

  • We have simultaneously fabricated LTPS TFTs and integrated photodiodes on the same glass substrates without any additional LTPS process. The structure of an integrated photodiode is a lateral p-i-n diode with a gate. The performances of a photodiode were improved at a negative gate voltage.

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