서지주요정보
LCD(Liquid Crystal Display) backlight 용 평판 플라즈마 특성에 관한 연구 = A study on the characteristrics of planar type plasma for backlight of LCD
서명 / 저자 LCD(Liquid Crystal Display) backlight 용 평판 플라즈마 특성에 관한 연구 = A study on the characteristrics of planar type plasma for backlight of LCD / 권은미.
저자명 권은미 ; Kwon, Eun-Mi
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012899

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 02008

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Conventional backlight for liquid crystal display (LCD) uses mercury which leads to environmental pollution. In this study, characteristics of AC coplanar type mercury-free plasma flat lamp have been studied. Pollution-free Xe-He was adopted as a discharge gas system. Since the Xe gas has a lower efficiency in generating vacuum ultraviolet (VUV) than mercury, the study on the improvement of luminance and luminous efficiency of the Xe gas system is very important. The subsequent fabrication of electrode, dielectric and phosphor layers on the bottom glass was carried out by using the screen printing method. Infrared (IR) emission characteristics of Xe-He gas mixture were analyzed by optical emission spectroscopy (OES). The Xe-He discharge gas generates 147, 150, and 173 nm VUV rays and 823, 828 nm IR rays. The intensity of 823 nm peak decreases whereas the intensity of 828 nm peak increases as the Xe concentration increases from 10% to 40%, indicating that the He atom incites the transition from higher Xe state to the metastable state but suppresses the transition to the resonance state. Luminance and luminous efficiency increase with increasing Xe concentration and gas pressure. However firing voltage and minimum sustain voltage also increase, and accordingly, a high voltage pulse generator and a high quality dielectric layer are needed. The effects of pulse shape, on-time, and pulse frequency on the luminance and luminous efficiency were examined. For Xe(5%)-He gas, the lamp exhibits higher efficiency with sharper pulse shape, higher peak voltage, and shorter pulse on-time (up to 2 ㎲). Higher efficiency and lower consumption of power could be obtained at 30 kHz than at 60 kHz. The collision of ions to bottom electrodes is a dominant factor to raise the lamp temperature. Therefore the high voltage and low current discharge system is needed to reduce the lamp temperature as well as to enhance the luminous efficiency.

서지기타정보

서지기타정보
청구기호 {MMS 02008
형태사항 iv, 84 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Eun-Mi Kwon
지도교수의 한글표기 : 이원종
지도교수의 영문표기 : Won-Jong Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 83-84
주제 LCD backlight
평판 플라즈마
Xe 기체
Pulse power supply
휘도
LCD backlight
Planar Type Plasma
Xe gas
Pulse power supply
Luminance
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