LED의 업계 동향과 발전 가능성

소개글

LED의 업계 동향과 발전 가능성을 소개하였습니다. LED의 기초적 원리부터 기능 및 앞으로의 국내외 전망을 가늠하였습니다.

목차

Ⅰ 서 론 ······························································································ 1

Ⅱ 본 론 ······························································································ 1
1. LED의 소개 ···················································································· 1
1) LED란? ····················································································· 1
2) LED의 발생원리 ········································································· 2
3) LED의 구조 ··············································································· 4
4) LED의 종류 ··············································································· 5
2. LED의 장·단점 ················································································ 7
1) LED의 장점 ··············································································· 7
2) LED의 단점 ··············································································· 10
3. LED의 응용분야 ·············································································· 10
1)디스플레이 광원 ··········································································· 10
① CCF
② 엣지 라이트 방식
③ 직하 라이트 방식
2) OLED
① OLED란? ·············································································· 12
② OLED의 작동원리 ·································································· 12
③ OLED의 장점 ········································································ 13
④ OLED의 종류 ········································································ 14
⑴ 수동형(PM)
⑵ 능동형(AM)
⑤ OLED의 응용분야 ·································································· 15
4. LED의 발전 방향 및 전망 ································································ 15
1) 국외 업계의 동향 ········································································ 15
2) 국내 업계의 동향 ········································································ 17
3) OLED의 전망 ············································································· 18
① 빛을 잃어가는 에디슨의 등불, 백열등
② 차세대 조명으로 주목받는 LED
③ LED 조명 캐즘 가능성
④ LED 조명 캐즘 극복 방안

Ⅲ 결 론 ······························································································· 29
Ⅳ 출 처 ······························································································· 29

본문내용

Ⅰ. 서 론
LED는 1900년대 후반부 활성화가 시작되어 현재에는 안방까지 자리를 잡아가고 있다. 이는 물리적 특성상 작고 에너지 효율이 타 전구 및 형광등보다 우수하며 보다 긴 수명을 갖으며 친환경적이기에 개발가능성이 무궁무진한 소자이다. 초기에 높던 단가도 상용화가 되면서 점차 낮아지게 되었고, 조명분야를 넘어서 실생활의 모든 분야에까지 진출할 가능성을 보여주고 있다.
다른 여러 국가에서는 이미 LED 분야에서 많은 점유율을 차지하고 있다. 이에 반해 우리나라는 이제 막 시장에 뛰어든 초기 단계라고 볼 수 있지만, 우리나라 역시 머지않아 곧 기술 선진국을 따라 잡고 추월할 수 있을 것으로 기대된다. 우리나라의 주력인 전자제품은 모두 차후에 LED를 채택하게 될 것이고 기반이 탄탄한 해외 및 국내 시장이 있기 때문에 큰 기대를 해도 좋을 것이다.
Ⅱ. 본 론
1. LED의 소개
1) LED란? 발광 다이오드(發光:diode)는 순방향으로 전압을 가했을 때 발광하는 반도체 소자 이다. LED (한국어:Light Emitting Diode)라고도 불리며, 발광 원리는 전계 발광 (Electroluminescence) 효과를 이용하고 있다. 또한 수명도 백열전구보다 상당히 길다. 발광색은 사용되는 재료에 따라서 다르며 자외선 영역에서 가시광선, 적외선 영역까지 발광하는 것을 제조할 수 있다. 일리노이 대학의 닉 호로니악이 1962년에 최초로 개발하였다. 오늘날까지 여러 가지 용도로 사용되었으며 향후 형광등이나 전구를 대체할 광원으로 기대되고 있다.
2) 발생 원리
발광 다이오드의 극성
발광 다이오드는 반도체를 이용한 PN 접합이라고 불리는 구조로 만들어져 있다. 발광은 PN 접합에서 전자가 가지는 에너지를 직접 빛 에너지로 변환되어, 거시적으로는 열이나 운동에너지를 필요로 하지 않는다. 전극으로부터 반도체에 주입된 전자와 정공은 다른 에너지띠 (전도띠나 원자가띠)를 흘러 PN 접합부 부근에서 띠간격를 넘어 재결합한다. 재결합할 때 거의 띠간격에 상당한 에너지가 광자, 즉 빛으로 방출된다.(자세한 것은 PN 접합을 참조)
전기적 특성

참고 자료

• 발광 다이오드, Wikipedia, (http://ko.wikipedia.org/wiki/발광_다이오드)
• 다이오드, Wikipedia, (http://ko.wikipedia.org/wiki/다이오드)
• LED 조명 '인체 안전성' 기준 급하다, ETNews,
(http://www.etnews.co.kr/news/detail.html?id=200908120018)
• LED가 눈에 좋다고 하던데 사실인가요?, Naver 지식iN,
(http://kin.naver.com/detail/detail.php?d1id=5&dir_id=51406&docid=5241433&qb=bGVk6rK97KCc&enc=utf8)
• LED의 이해, 굿모닝 신한증권 LED : Green Energy, Issue Paper(리서치 자료)
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(http://withnotebook.tistory.com/m/post/view/id/58)
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(http://itnews.inews24.com/php/news_view.php?g_serial=397708&g_menu=020200)
• 디스플레이의 핵심 부품 기술 - CCFL의 기술 및 동향, EP&C News, Special Feature
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• OLED Display, 경북대학교 물리학과, 김충수
• AM OLED의 3가지 장점과 3가지 혜택, LG 전자 The BOL