• The Transactions of the Korean Institute of Electrical Engineers P
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• v.51 no.3
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• pp.132-136
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• 2002

In this study, we analyzed the luminous efficiencies of Ne-Xe-Ar and He-Ne-Xe-Ar mixing gas in compared with those of Ne-Xe and He-Ne-Xe mixing gas to improve luminous efficiency by adding a small amount of Ar gas. At the Xe 4%, the brightness of Ne-Xe and He-Ne-Xe mixing gas is higher than others. As the Xe % increases, power consumption decreases. Thus, in the Ne-Xe and He-Ne-Xe mixing gas of Xe 4%, we obtained maxium luminous efficiency. The Ar concentration is varied from 0.1% to 0.7% in this study. The luminous efficiency of the Ne-Xe(4%) mixing gas is improved to 1.16 and 1.13 lm/W by adding an Ar concentration of 0.4% and 0.5%, respectively. The luminous efficiency of the He-Ne-Xe(4%) (He : Ne = 7 : 3) mixing gas is considerably improved by adding an Ar concentration of above 0.3%. The maximum luminous efficiency of this mixing gas is 1.38 lm/W at the condition of adding an Ar concentration of 0.5%.

• Proceedings of the Korean Vacuum Society Conference
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• 1997.07a
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• pp.177-180
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• 1997

현재 플라즈마 디스플레이에 이용되는 He-Ne-Xe 이원가스의 단점을 상호보완하기 위하여 He-Ne-Xe 혼합가스의 방전특성 실험을 수행하였다. Xe(5%)에서 He:Ne의 혼합비는 3:2일 때 최적의 휘도와 구동전압, 색순도를 갖는 것으로 나타났으며, Xe의 혼합비의 대해서는 Xe의 혼합비가 증가할수록 휘도와 색순도가 향상되었으며 구동전압은 높아졌다.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.48 no.6
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• pp.483-488
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• 1999

The optimal mixing condition of four components gas(Ne,Xe,He,Ar) in PDPs was caculated by a numerical simulation method. The dominated reactions in which $Xe^*(^3P_1)$ is produced and decays were investigated in three components gas (Ne,Xe,He) and our new components gas (Ne,Xe,He,Ar). A peak point of $Xe^*$ density appears in the range of 0.1% to 2% of Ar mixture ratio. The results of simulation show that the direct exitation of Xe by electrons has the greatest influence on the inceasing $Xe^*$ density in both gas mixtures.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.744-747
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• 2009

Plasma Display Panels (PDPs) have illustrated impressive results in terms of light emission efficiency of the Ne-Xe mixture compared with the He-Xe mixture. However, He-Xe has shown to achieve superior color purity. This paper presents the optimization of excitation efficiency and color purity for He-Ne-Xe ternary gas mixtures. Furthermore, we investigate the effect that a protective dielectric layer has on UV photon efficiency in a matrix known as electrode type PDP.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.366-368
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• 2008

The discharge characteristics of He-Ne-Xe gas mixture with the variation of Xe content are investigated through the numerical simulation. VUV efficacy in the gas condition of low Xe content increases due to more excitation and the case of high Xe content shows the improvement of VUV efficacy with the increase of He content but decreased VUV efficacy after tthe He mixing ratio of He and Ne is 0.5 due to frequent ionization.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.27-28
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• 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.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.431-431
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• 2010

본 논문은 기존의 수은 형광 램프와 LED를 대체할 수 있는 무 수은 면광원의 방전 가스 조성 변화(He, Ne, Ar, Xe)에 따른 전기 광학 특성에 관한 연구이다.[1]~[4] 무 수은 면광원의 기본 구조는 그림 1과 같이 방전 공간 내에 유전체에 의해 방전 공간과 분리된 한 쌍의 평행한 전극으로 이루어져 있다. 그리고 방전 공간 내면에는 일정한 두께와 형상을 가지는 형광체가 도포되어 있고 주 전극의 반대 평판유리 외벽에 보조전극을 형성하였다. 방전을 발생시키기 위한 기본적인 구동 방법은 5~25kHz의 주파수와 $0.7{\sim}1.5{\mu}s$의 폭을 가지는 사각 펄스를 사용한다.[4] 그림 2는 Ne-Xe 가스를 기본으로 하여 He 첨가에 따른 전기 광학 특성을 보여준다. He 첨가량이 증가할수록 동작 전압이 높아지면서 방전 개시와 동시에 수축 방전으로 전이되는 형태를 보이며, 효율 또한 감소함을 보였다. 이것은 무 수은 면광원에서는 높은 He의 이차전자 방출 계수보다 He의 높은 이온화 에너지가 더 크게 작용하기 때문이라 생각된다. 그림 3은 Ne-Xe 가스를 기본으로 하여 Ar 첨가에 따른 특성을 보여준다. He과는 다르게 Ar 첨가량이 증가할수록 동작 전압 마진이 넓어진다. 그러나 동작 전압이 상승하고, 효율 역시 감소하는 단점이 있다. 이것은 Ar은 Ne에 비해 이온화 에너지가 낮지만 Ar-Xe 조합은 Penning 효과를 얻을 수 있는 혼합 가스가 아니며, Ar의 2차전자 방출 계수 역시 Ne에 비해 낮기 때문에 결과적으로 방전 전압은 상승하고 효율이 감소하는 결과를 보여준다. 그러므로 무 수은 면광원에서 낮은 구동 전압과 높은 휘도 효율을 얻기 위해서는 Ne-Xe 가스조건이 가장 적합한 가스 조건이다. 효율 개선을 위해서는 Ne-Xe 가스 조건에서 압력을 높이거나 높은 Xe 함량의 가스 조성비를 사용하여 자외선 발광원인 Xe 가스량을 높이는 방법이 가장 유리하다. 그림 4는 Ne-Xe 가스 조건에서 Xe 가스량을 높이면 효율이 증가하는 경향성을 보여준다. 가스 최적화 연구와 더불어 형광체 최적화 연구[5]를 통해서 Ne-Xe25% 100Torr 가스 조건에서 그림 5와 같은 19,000nit의 높은 휘도와 75lm/W의 고 효율 특성을 얻을 수 있었다.

• Journal of the Korean Vacuum Society
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• v.11 no.2
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• pp.127-134
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• 2002

Recently, Plasma display panel(PDP) has been in the spotlight as one of the next generation flat-panel-display device. The luminance and luminous efficiency improvement is the hot issues for making a plasma display into a large flat panel device. In this paper, We suggest a new penning gas mixture, in order to find the optimum mixture gas in plasma display panel. The optimum gas composition has been found by the partial pressure of inert gases(such as Af and Kr added to matrix of He(70%)-Ne(27%)Xe(3%) and Ne(96%)-Xe(4%)). The influences of Ar or Kr addition to Ne(96%)-Xe(4%) and He(70%)-Ne(27%)-Xe(3%) mixture gases are experimentally investigated for AC Plasma Display Panel. When rare As(0.01%-0.03%) or Kr(0.01%-0.03%) is added Ne-Xe and He-Ne-Xe mixture gases, the luminance increases over 10%-20% and luminous efficiency increases over 10%-20% at 200 Torr. It is sure that luminance and efficiency are improved by Penning effect. Also, This influence of Penning effect is shown by increased wall charge(10%-25%). In addition to the result, firing voltage and minimum sustain voltage was approximately decreased by 2V-3V.

• Journal of the Microelectronics and Packaging Society
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• v.5 no.1
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• pp.1-6
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• 1998

Two kinds of the ac-plasma display panel (PDP) with the comb type and the matrix type electrodes were fabricated. The discharge properties were studied as a function of as species (Ne and Ne+He+Xe) and its pressure. The firing voltages (Vf) of the PDP with comb type electrodes were 159 V and 195 V under pure Ne and ne+He+Xe(68:30:2) gas mixture respectively. In case of PDP cell with the matrix type electrodes the Vf was increased to 200 V for pure Ne and 240 V for Ne+He+Xe gas mixture under the same gas pressure(300 mbar).

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1221-1224
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• 2005

The improvement of luminance and luminous efficiency is the one of the most important parts in AC-PDPs. To achieve high luminance and luminous efficiency, high VUV emission efficiency is needed. We measured the emission spectra of the vacuum ultraviolet(VUV) rays in surface discharge AC-PDP with ternary gas mixture of He-Ne-Xe. The influence of He-Ne-Xe gas-mixture ratio on excited $Xe^{\ast}$ resonant atoms and $Xe_2\;^{\ast}$ dimers has been investigated. It is found that luminous efficiency of ternary gas mixture, He-Ne-Xe, is shown to be much higher than that of binary gas mixture of Ne-Xe. For improving discharge luminous efficiency, we have studied VUV emission characteristics of ternary gas mixture, He(50%)-Ne-Xe and He(70%)-Ne-Xe with Xe concentration and filling gas pressure.