• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1932-1933
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• 2007

본 연구에서는 sustain 펄스의 개수와 폭의 변화에 따른 sustain 방전의 휘도특성을 측정하였다. 실험을 위하여 PDP 구동실험장치에 사용하는 디지털 시스템과 고전압 펄스 driver 회로부를 개발하였다. 실험결과, 1TV-field 동안 인가되는 sustain 펄스의 개수가 증가할수록 휘도는 완만한 포화곡선을 나타내며 증가하였고 펄스의 폭이 좁아질수록 휘도가 증가하였다. 그리고 펄스폭에 대한 휘도의 증가 정도는 펄스의 개수가 증가할수록 커졌다.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.687-690
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• 2009

It has been recently reported that nano-sized MgO single crystal powders emit ultraviolet by stimulation of electrons under vacuum condition. Therefore, in this study, nano-crystalline MgO powders were applied to a xenon plasma flat fluorescent lamp for LCD backlight to improve emission efficiency of the lamp by help of extra ultraviolet from nano-MgO. For comparison with nano-crystalline MgO powders, MgO nano-thin film was applied directly on phosphors inside a lamp panel through e-beam evaporation The luminance and efficiency of FFL with an addition of MgO nano-crystal powders on phosphors were improved by around 20%. Application of MgO thin film to phosphors worsened the emission characteristics of FFLs, even rather than FFL without MgO. The reason came from insufficient stimulation of phosphors by UV, crystallinity of MgO, and low secondary electron coefficient.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.2
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• pp.9-14
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• 2007

Recently, in order to improve the characteristics of operating voltage, brightness, discharge time lag, luminous efficacy of ac PDP, the PDP with high Xe partial pressure has been investigated. However, the serious problems in this case is to increase the operating voltage of ac PDP. In this study, in order to meet this problem the influences of kr gas in Ne-Xe-Kr ternary gas system is investigated for wide range of Xe partial pressure in terms of operating voltage, driving margin, luminance and luminous efficacy.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1215-1217
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• 2005

One of the important problems in recent AC-PDP technology is the image sticking. In this research, we have investigated the PDP cell with constraint deposition MgO on phosphor, the electrical and optical properties in the PDP cell were examined. Also, we have investigated the correlation with image sticking and degraded MgO protective layer, phosphor in AC-PDP. As a result, we measured the secondary electron emission coefficient ${\gamma}$, discharge characteristics and Brightness for the constraint degraded phosphor are compared with those of nondegraded phosphor.

• Proceedings of the KIEE Conference
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• 2001.07c
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• pp.1585-1587
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• 2001

ac PDP 동작에 있어 미량 불순물 가스는 panel 내의 휘도 및 방전 특성에 많은 영향을 미칠것으로 생각된다. $O_2$, O, C 및 $H_2$와 같은 불순물 가스는 ac PDP의 제조 공정 중에 발생하거나, 충전된 방전가스에 혼합되어 발생하는 등 여러 가지 원인으로 나타난다. 이 논문에서는, ac PDP의 동작 가스 중에 미량의 불순물 가스(Ar, $N_2$, $O_2$, $H_2$, $CO_2$)를 주입하여, 이 미량의 불순물 가스로 인한 ac PDP의 휘도 및 방전의 특성변화에 대한 관계를 조사하였다. 그 결과, $O_2$ 가스의 분압이 $2{\times}10^{-3}$/He+Ne+Xe(4%)일 경우, 방전전압은 12% 증가하였고, 휘도는 60% 감소하였다. 또한, $CO_2$ 가스의 경우는 방전전압은 14% 증가하였고, 휘도는 44% 감소하였다.

• Proceedings of the KIEE Conference
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• 2001.07c
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• pp.1588-1590
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• 2001

The voltage controlled ramp waveform(VCR) has recently been used in the reset period prior to addressing for plasma display. However, in this paper, the current controlled ramp waveform(CCR) which may prevent the oscillation of gap voltage cause current growth and decrease the background luminance has been suggested. As a result, in case of CCR method, the contrast ratio was about 14% increased compared with VCR method, whereas the addressing and sustainin discharge characteristics of CCR method were same with those of VCR method.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.41 no.8
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• pp.25-30
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• 2004

In this paper, we suggest a new front panel structure with ridged front panel dielectric layer and hollow gap. The proposed structure can decrease a driving voltage and increase Xe content due to strong electric fields. In the experiment, we have used 6" test panel with 10 %, 15 %, 20 %, 30 % and 50 % Xe contents and 450 torr gas pressure. When comparing with a conventional structure in Xe 10 %, the proposed structure with same Xe content decreased a firing and sustain voltage by about 74 V and 79 V, also the luminance and luminous efficacy of proposed structure with 50 % Xe content were improved by about 33 % and 50.9 %..9 %.

• Korean Chemical Engineering Research
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• v.47 no.2
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• pp.150-156
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• 2009

Plasma Display Panels(PDPs) require to have improved luminous efficiency, low manufacturing cost, and high image quality to compete with other flat display devices such as Liquid Crystal Displays(LCDs) and organic light-emitting diodes(OLEDs). In addition, the diversity of product line-up may be needed for high market share. In this paper, the optical characteristics of typical green phosphor for PDP application are reviewed and the problem-based solution will be proposed. We also shortly describe the principle of 3D-PDPs which are promising. Then, the requirement of green phosphor for 3D-PDP application is summarized and research achievement, as of now, is described. The typical problems of $Zn_2SiO_4:Mn$ phosphor, which is the most well-known, are the negatively charged surface property and the long decay time, which leads to unstable discharge in green cell and afterimage. These problems were solved by coating the phosphor surface with metallic oxide. It was found that $Al_2O_3$ would be the best material for $Zn_2SiO_4:Mn$ phosphor. It gives longevity as well as low operating voltage due to the charging effect in green cells. Also, new phosphors, $(Y,\;Gd)Al_3(BO_3)_4:Tb$ and $(Mg,\;Zn)Al_2O_4:Mn$ phosphor are proposed for increasing the luminance and reducing the decay time, which are capable to apply for 3D-PDP application.