• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1989년도 하계종합학술대회 논문집
• /
• pp.409-410
• /
• 1989

Discharge characteristics of a commercial made Xe-flashlamp have been studied for the pumping source of dye Lasers. The rise-time, FWHM, intensity and energy of pumping light pulses of the lamp were measured as functions of the serial resistor and applied voltage. The grid effects of the lamp on pre-discharge and the spectrum of light pulses also have been investigated.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
• /
• pp.171-174
• /
• 2005

Experimental measurements are reported and compared with the results of a two-dimensional fluid simulation for the investigation of the discharge characteristics regarding the change of the mixture ratio of Ne-Xe-He noble gases. The increase of Xe contents results in the increases of luminance and luminous efficiency while it also results in the increase of the breakdown voltage and the discharge time lag. The addition of He gas increases the brightness and the luminance efficiency. When Xe partial pressure is low, the luminance efficiency increases with the amount of He at the same total pressure. When Xe partial pressure is high, however, the luminance efficiency has a maximum value when the partial pressure of He is about 10% of the total pressure for a standard AC PDP cell with Xe fraction of $10{\sim}30%$.

• 전기학회논문지
• /
• 제61권11호
• /
• pp.1650-1655
• /
• 2012

AC-PDPs have recently achieved good performance and their image quality can sufficiently compete with the LCD TV. However, it is necessary more effort to improve the luminance and luminous efficacy in the PDP technology. The gas mixture ratio plays a very important role in discharge characteristics, but the mechanism of gas discharge is complex and complicated. In this paper, we investigate the mechanism of gas discharge with Ne+Xe miture ratio through zero and two dimensional fluid simulation.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
• /
• pp.506-507
• /
• 2005

The effects of addition of $D_2$ to conventional gases [Ne-Xe and He-Ne-Xe] on the discharge characteristics were investigated in this work with the aim of improving the voltage margin, the wall charge and the jitter. The addition of an extremely small gas-inlet amounts of $D_2$ increased the number of electrons which improves. the $Xe^*$ density and $Xe_2^*$ density. As a result, the voltage margin, the jitter and the wall charge increased.

• 한국진공학회지
• /
• 제17권4호
• /
• pp.322-330
• /
• 2008

유리관의 관경이 4 mm인 형광램프에서 종단방전과 횡단방전의 방전 특성, 발광 특성, 그리고 분광 특성을 상호 비교 분석하였다. 제작된 형광램프의 주입 기체는 3 종류이며, 수은 혼합 기체인 Ne(95%)+Ar(5%)+Hg(2 mg), 무수은의 순수 Xe 100% 및 Ne(96%)+Xe(4%)의 혼합 기체이다. 각 형광램프 샘플들의 기체 압력은 8 종으로 압력 범위는 $5{\sim}300\;Torr$이다. 상기 램프의 특성을 조사하기 위하여 제작된 샘플 램프의 전체 수는 주입 기체 3 가지와 각 압력 8 가지로서 총 24 개이다. 수은 형광램프는 양광주 발광을 특징으로 하는 종단방전에서 발광 휘도 및 효율이 매우 높고, 횡단방전에서는 거의 발광하지 않는다. 무수은 제논 형광램프는 횡단방전에서 비교적 높은 휘도 특성을 보이며, 종단 방전에서는 방전 전압이 높고 발광 효율도 매우 낮다. 제논 형광램프의 횡단방전은 Ne+Xe(4%)인 혼합 가스보다 압력($\sim$수 100 Torr)이 높은 순수 제논 가스의 발광 효율이 더 높다. 본 실험을 통하여 수은 램프와 무수은 제논 램프의 방전 방식의 차이를 확인하였다. 수은 형광램프는 양광주를 활용하는 종단방전의 형태로서 종래의 튜브형이 바람직하다. 무수은의 제논 형광램프는 높은 압력($\sim$수 100 Torr)의 순수 제논 기체에 대하여 방전 경로가 짧은 횡단방전을 특징으로 하는 평판형이 바람직하다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2011년도 제42회 하계학술대회
• /
• pp.1582-1583
• /
• 2011

Recently, it has been found that trifluoroiodomethane ( $CF_3I$) gas can replace $SF_6$ gas as a prospective substitute gas. For quantitative understanding of gas discharge phenomena, we should know electron collision cross sections and electron transport coefficients. Using electron collision cross sections of $CF_3I$ and Xe, we calculated elecron drift velocity, longitudinal coefficient, effective ionization coefficient in $CF_3I$-Xe mixtures using a two-term approximation of the Boltzmann equation. We also compared the electron transport coefficients in pure gas and those of 10%, 20%, 50%, and 70% $CF_3I$-Xe mixture gases. The present data may be showed appropriate ratios of $CF_3I$-Xe mixture gas for replacing the $SF_6$ gas.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
• /
• pp.27-28
• /
• 2000

We examined ($He_x-Ne_{l-x}$)-Xe gas discharge in an AC PDP cell by computer simulation to understand the gas mixing effects. The breakdown and sustain voltage were significantly lowered with the addition of Ne into He-Xe. The luminance and efficiency in ($He_x-Ne_{l-x}$)-Xe also improved when compared with the He-Xe or Ne-Xe gas mixture. The luminance is maximum around $30{\sim}40%$ He addition, while the efficiency shows peak values at 70% He. Two-dimensional numerical simulation was done to explain these results.

• 한국재료학회지
• /
• 제13권4호
• /
• pp.271-278
• /
• 2003

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 is adopted as a discharge gas system. Since the Xe gas has a lower efficiency in generating vacuum ultraviolet (VUV) than mercury, the improvement of luminance and luminous efficiency in the Xe gas system is very important. The electrode, dielectric, and phosphor layers constituting lamp are formed on the bottom glass by the screen printing method. The effects of pulse shape, on-time, and pulse frequency on the luminance and luminous efficiency have been 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 $\mu\textrm{s}$). Higher efficiency and lower consumption of power were obtained at 30 kHz than at 60 kHz. The collision of ion to bottom electrodes is a dominant factor to raise the lamp temperature. Therefore the high voltage and low current discharge system is necessary for reduction of the lamp temperature as well as for enhancement of the luminous efficiency.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
• /
• pp.103-104
• /
• 2000

Voltage transfer curves have been used for analyzing the micro-discharge characteristics of cells in ac-PDP. This paper deals with the effect of working gas species, pressure and frequency of applied voltage on the micro-discharge characteristics. Using the mixture gases of He+Xe or He+Ne+Xe, wall voltage steeply varied compared with only He gas, and also voltage margin increased. Discharge voltage and voltage margin increased with increasing Xe percentage, and also wall voltage more steeply varied. In addition, the variation of effective wall capacitance which is significantly dependent on the discharge strength is discussed.

• 전기학회논문지
• /
• 제61권2호
• /
• pp.237-242
• /
• 2012

In this paper, we investigated effects of ITO electrode geometry and dielectric layer thickness on the discharge Characteristic of AC PDP. As the dielectric thickness is decreased ($30{\sim}12{\mu}m$), firing and sustain voltage is decreased. Luminance and discharge power increase with decreasing dielectric layer thickness because of increasing capacitance between plasma and electrodes. Reactive power decreases with dielectric thickness due to reduced capacitance between sustain electrodes. For the high Xe test panel with small ITO electrode, luminous efficacy as well as luminance increase with decreasing dielectric layer thickness. This result suggest that high power density and small plasma volume is beneficial for high efficacy discharge.