• 제목/요약/키워드: Xe-discharge

검색결과 154건 처리시간 0.027초

용량이행영 소형 XeCl레이저 제작 및 출력특성 (Fabrication and Output Characteristics of Compact Capacitor Transfer XeCl Laser)

  • 김동환
    • 한국광학회지
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    • 제4권1호
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    • pp.57-65
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    • 1993
  • 용량 이행형 방전여기에 의한 소형 XeCl레이저를 제작하고, 가스 혼합비에 따른 출력특성을 조사하였다. 내자형 capacitor에 의한 자동 예비전리 방식과 2.7 cm 간격의 Chang형상으로 가공된 전극구조의 레이저를 구성하여 2.7cm${\times}$1.5cm 크기의 출력 빔을 얻었고, Xe과 HC1의 농도 변화 및 완충 기체의 종류에 따른 최대 출력 에너지 및 최대 효율 조건을 조사하였다. 최대 레이저 펄스 에너지는 Ne 완충기체를 사용시 230mJ이며, 단위 방전 체적당 1.1 J/l의 에너지를 얻었으며, 최대 에너지 효율은 1.6%이었다. 1:3의 낮은 비율의 피-킹 캐패시턴스의 구성에 의해 레이저 펄스폭은 장펄스 효과를 나타내 foot-to-foot 200 ns로 측정되었다.

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Improvements of the luminous efficiency of mercury-free fluorescent lamps via structural and complex gas mixture changes

  • Oh, Byung-Joo;Jung, Jae-Chul;Seo, In-Woo;Kim, Hyuk;Whang, Ki-Woong
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.809-812
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    • 2008
  • Structural parameter variation effects (changing the coplanar gap under different discharge dimensions) and use of complex gas mixtures (He, Ne, Ar and Xe) in mercury-free fluorescent lamps are studied in this paper. Pure Neon gas is the best buffer gas for obtaining high luminous efficiency in mercury-free fluorescent lamps. It is shown that with a shorter coplanar gap (30mm), a high luminous efficiency can be obtained at low operating voltage, as well as high luminance uniformity and stable discharge with a Ne-Xe 20% gas mixture.

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Luminous efficacy of 12 lm/W in an AC PDP in terms of measurement of the discharge in Ne+20%Xe and green cells

  • Lee, Sung-Min;Cho, Kwan-Hyun;Choi, Kyung-Cheol
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.119-122
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    • 2007
  • Dual auxiliary pulses are adopted in an AC PDP with an auxiliary electrode. The secondary auxiliary pulse of dual auxiliary pulses efficiently utilizes priming particles and contributes to improved luminous efficacy. A shorter time interval between the two auxiliary pulses resulted in better efficacy. The maximum luminous efficacy was approximately 12 lm/W according to measurement of the discharge in a Ne+20%Xe gas-mixture and green cells.

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광원을 위한 AC구동 유전체장벽 미세공음극 구조와 상한 pd 제한조건 (The Dielectric Barrier micro-hollow cathode structure and its upper pD limitation in alternative current driving for flat panel light source)

  • 박기완;이태일;제갈종필;백홍구
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2005년도 춘계학술대회 논문집
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    • pp.45-47
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    • 2005
  • The Dielectric Barrier micro-hollow cathode structure and it's upper pD limitation are investigated for determining of optimum hollow cathode discharge condition. In experiment, discharge is sustained by AC diriving and investigated gas is pure Xe. From Experiment, Optimum pD range is lower than 0.72 torr.cm at pure Xe and Cu cathode.

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Effects of Panel Temperature on the Discharge Characteristics of Micro Discharge Cells

  • Shim, Kyung-Ryeol;Park, Chung-Hoo;Lee, Ho-Jun
    • KIEE International Transactions on Electrophysics and Applications
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    • 제4C권5호
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    • pp.215-219
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    • 2004
  • The effects of ambient temperature on the discharge characteristics of Ne-Xe based micro discharge cells for ac-PDP (plasma display panel) have been studied. In ramp voltage driving, which is generally used as a reset method of PDP, two dissimilar modes of strong and weak discharge were found. As the interval between the former sustaining discharge and ramp voltage discharge becomes greater, the probability of a strong discharge increases. This suggests that a sufficient number of priming particles is necessary for initiating weak mode (Townsend discharge). It was discovered that under higher ambient temperatures, weak discharge occurs more frequently. The discharge time lag observed in square pulse driving of single cells becomes surprisingly smaller under higher ambient temperatures for the constant gas number density condition.

교류형 플라즈마 디스플레이 패널의 방전 조건변화에 따른 형광막의 발광특성 (Luminescence Properties of Phosphor Layer with Discharge Conditions in AC PDP)

  • 장상훈;태흥식;최경철
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제48권10호
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    • pp.704-709
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    • 1999
  • The optical properties such as luminance and color coordinates for phosphor layer were studied with applied voltage and gas pressure, Xe mixing ratio, frequency using He and Xe mixing gas in chamber like AC PDP. The luminance of red phosphor layer at constant pressure(300Toor) is increased with increasing voltage, but color purity is not varied. The luminance of red phosphor layer at constant voltage(280V)is decreased with increasing pressure, but the color purity is not varied. But the luminance is increased with increasing Xe mixing ratio at constant pressure(200Toor). And also the color purity is improved by this process. The luminance is increased up to 40kHz, but the color purity with frequency is not varied.

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Pulse Density Modulated ZVS High Frequency Inverter with Reverse Blocking Single Switch for Dielectric Barrier Discharge Lamp Dimming

  • Sugimura Hisayuki;Yasui Kenji;Omori Hideki;Lee Hyun-Woo;Nakaoka Mutsuo
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2006년도 전력전자학술대회 논문집
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    • pp.206-209
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    • 2006
  • At present, the cold cathode fluorescent lamp (CCFL) using mercury lamp has been generally used far liquid crystal backlight source of personal computer and car navigation and so on. This kind of lamp is more excellent on luminance performance and cost. However, the requirements of liquid crystal backlight due to a light source without mercury have been strongly increased from a viewpoint of the actual influence on environmental preservation and environmental recycling. As fluorescent lamp without mercury, Dielectric Barrier Discharge based rare gas fluorescent lamp (DBD-FL) using xenon (Xe) gas has been studied so far. This DBD lamp has no influence on the human body and environmental recycle. Its operating life is long because electrode is out. In this paper, the simulation and experimental results of soft switching high frequency inverter with reverse blocking single switch as a high frequency power supply circuit for DBD-FL using Xe gas are comparatively evaluated and discussed from a practical point of view.

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제논 (Xe) 평판형 플라즈마 광원의 전기적 및 광학적 특성 연구 (The Electrical and Optical Properties of Xe Flat Plasma Light Source)

  • 최용성;문종대;이경섭;이상헌
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2006년도 영호남 합동 학술대회 및 춘계학술대회 논문집 센서 박막 기술교육
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    • pp.86-90
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    • 2006
  • Discharge of the flat lamp lighting source research are requested very much. For improving brightness, life time, efficiency of flat lamp, plasma diagnosis of the f1at lamp lighting source to understand property of lighting source is very important. Distance of discharge electrode is 5.5mm and width is 16.5mm, we have measured electron temperature and electron density measured with single Langmuir probe in flat lamp. We have tested the discharge from 100 Torr to 300 Torr pressure. The pulse is rectangular pulse with frequency 20kHz and duty ratio 20%. In result, electron temperature decreases and electron density increase as increase the gas pressure and electron temperature decreases and electron density increase as increase the voltage.

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플라즈마 방전 클러스터를 이용한 플렉시블 백라이트 유닛 연구 (A Study of Flexible BLU Using Plasma Discharge Ouster)

  • 유시홍;구교욱;이성의
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2008년도 추계학술대회 논문집 Vol.21
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    • pp.324-325
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    • 2008
  • In this Study, We fabricated a plasma discharge cluster with external electrodes which can be applied to flexible backlight in a polymer substrate and investigated the discharge characteristics. The Sealing process was progressed in vacuum chamber, which enable to fabricate plasma discharge cluster. The results of discharge characteristics show that the static memory margin of plasma discharge cluster was increased, as Ne/Xe(5%) gas pressure was increased. also, When gas pressure was 100torr at 600um of electrode gap, we have obtained high luminance of a plasma discharge cluster.

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Measurement of excited Xe($1s_4$) and Xe($1S_5$) atoms by laser absorption spectroscopy in coplanar AC-PDP

  • Oh, P.Y.;Lee, J.H.;Moon, H.S.;Hong, J.W.;Jeon, W.;Cho, G.S.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.515-517
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    • 2004
  • The laser absorption spectroscopy has been used for measuresurement of the xenon atoms in the resonant $1S_4$ and metastable $1S_5$ states in coplanar AC PDP. For the purpose of improving VUV luminous efficiency and optimization of PDP cells, it is important to study behavior of excited Xe atoms in a micro-discharge cell of a coplanar AC-PDP. We measured the xenon excited density of $1S_5$ and $1S_4$ state under mixture gas of Ne-Xe(10%) with gas pressure of 350 Torr and sustaining gap distance of 150 um.

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