• The Transactions of the Korean Institute of Electrical Engineers C
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• v.48 no.5
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• pp.361-366
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• 1999

The life of AC PDP depends largely on the sputtering-resistant property of the protecting layer such as MgO thin-film. However, it is very difficult to measure the sputtering-resistant property in the stable driving conditions of AC PDP. In this paper we have suggested a high speed measurement technique of the sputtering-resistant property of MgO thin-film by applying the MgO thin-film as the target of RF magnetron sputtering system. We have also applied this method to the e-beam MgO and sputter-MgO and e-beam MgO superior to sputter-MgO 3 times over. Also, the relation of Xe gas partial pressure(X) and sputtered thickness(Y) was Y=3.4X+13.5.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.35D no.11
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• pp.78-84
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• 1998

Refractive index was matched using the inhomogeneous dielectric layers to enhance the optical transmittance of surface discharge type AC PDP. The transmittance of upper panel which had two index-matched inhomogeneous dielectric layers was measured as 85%, and this result is regarded as 15% better transmittance than that of conventional structure, which is about 70%.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.15 no.9
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• pp.841-847
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• 2004

EMI emission characteristics of 42" AC-PDP panel are investigated in this paper. First, EMI emission source was modeled the scan electrode and the sustain electrode to a simple electric and magnetic dipole type radiator. Second, EMI emission source was modeled as reconfigured the scan electrode and the sustain electrode. The primary source of EMI emission was investigated using FEM calculation of the wave impedance and 3 dB beam width. The third. the EMI emission level was estimated using the measured sustain electrode current. Also, EMI emission level of 42" AC-PDP was measured. The results show that the calculated EMI emission level from the simple electric dipole model was shown to agree with that from the corresponding FEM simulation.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.49 no.9
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• pp.527-532
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• 2000

The performance of ac plasma display panels (PDP) is influenced strongly by the surface glow discharge characteristics on the MgO thin films. This paper deals with the surface glow discharge characteristics and some physical properties of MgO thin films prepared by reactive RF planar unbalanced magnetron sputtering in connection with ac PDP. The samples prepared with dc bias voltage of -10V showed lower discharge voltage and lower erosion rate byion bombardment than those samples prepared by conventional magnetron sputtering or E-beam evaporation. The main factor that improves the discharge characteristics by bias voltage is considered to be due to the morphology changes or crystal structure of the MgO thin film by ion bombardement during deposition process.

• Proceedings of the KIPE Conference
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• 2001.07a
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• pp.446-449
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• 2001

This paper presents the results of the power system analysis and power loss breakdown peformed on a 40-inch ac plasma display panel (PDP) TV set. The architecture and function of power system is reviewed. The power flow inside the PDP TV set is presented, and the distribution of the power loss is analyzed. It was found that the sustain driver circuit and power factor correction (PFC) circuit are the two major sources of the power loss. The results of this paper can be used as a preliminary guideline to improve the architecture and efficiency of power systems for ac PDP application systems.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2000.04a
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• pp.152-154
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• 2000

Electro_optical characteristics in AC-PDP are confined by a lots of parameters. especially driving pulse shape is very important to improve AC-PDP's luminosity and efficiency. In that experiment measure the luminosity, IR(Infra Red) peak value and response time as the increase of 1st, 2rd sustain pulse width. The VDS(Versatile Driving Simulator -developed by kwangwoon university-) was used to make driving pulse shape. It is found that IR response time after displacement current, Luminosity and IR peak value are changed on account of 1st,2rd sustain pulse width.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.4
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• pp.22-27
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• 2004

The gas discharge AND gate which have been newly proposed is applied to three electrode surface discharge AC PDP. The address discharge characteristics by the DC-AC floating discharge by which Y electrode is made floating electrode is analyzed The address discharge can be begun by using the floating discharge from the experiment result Moreover, the display discharge can be sustained. The DC priming discharge that the floating discharge is matched to timing is generated in a supplementary electrode. As a result, space charge is supplied enough to the space of the floating discharge and the data voltage is lowered up to l00(V). Driving method to use this DC-AC floating discharge is able to obtain the address operation margin of l00(V).

• Proceedings of the KIEE Conference
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• 2004.11a
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• pp.133-136
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• 2004

AC PDP의 구동방법 중 가장 대표적인 구동 법이라 할 수 있는 ADS 구동 법은 구현이 비교적 용이하고, 안정적인 구동특성으로 인하여 현재 많은 상용 AC PDP의 구동 법으로 널리 채택되고 있다. 본 논문은 현재 AC PDP의 주요 연구 분야 중에 하나인 고속 어드레싱에 관한 새로운 구동파형을 소개하였다. 기존 AD을 구동법은 초기화구간과 어드레스구간 그리고 유지구간이 명확히 분리되어 있어 FULL- HD급 화면을 구현하기 위해서 어드레싱에 소비되는 시간의 감소가 불가피하다. 이러한 문제를 해결하기 위하여 어드레스 펄스폭을 줄여주지만, 이로 인하여 불안정한 어드레싱을 초래하게 된다. AC PDP의 초기화 구간의 파형은 이후의 어드레스 특성에 중요한 영향을 끼치는데, 초기화간에 형성된 priming 입자는 어드레스 방전에 크게 도움을 준다. 본 논문은 초기화구간이 끝난 후 priming 효과가 급격히 떨어지는 80us이후에 벽전하 형성을 돕는 벽전하 가속펄스의 사용으로 짧은 어드레스 펄스폭으로 인한 불안정한 어드레싱을 보완하고, 어드레스 과정 후 유지방전 모드로의 벽전하의 형성을 빠르게 유도할 수 있어 1us의 짧은 어드레스 폭으로도 안정적인 어드레싱을 수행할 수 있도록 하였다.

• Proceedings of the KIEE Conference
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• 2004.11a
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• pp.137-140
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• 2004

AC PDP의 휘도는 유지기간에서의 휘도에 따라서 결정된다. 그래서 기존보다 향상된 휘도를 구현하기 위해서는 유지기간에서의 휘도를 높여야 한다. 이러한 PDP가 갖는 휘도 특성을 개선하기 위한 목적으로 Panel의 셀구조의 변형, 전극 구조의 변화 또는 방전 가스의 혼합비율조정 등 다양한 노력과 시도를 계속 하고 있지만 PDP의 생산 단가의 상승을 초래할 수 있으며, 전극 간격을 조절하여 휘도를 개선하는 방식은 화질의 저하시킬 뿐만 아니라 방전전압을 증가시키게 됨으로 소비전력을 증가시키게 된다. 본 논문에서는 AC PDP의 구조, 전극 및 가스등을 기존방식 그대로 사용하면서 고휘도 방전모드를 구현할 수 있는 새로운 유지펄스에 관한 파형을 연구하였다. 본 연구에서 제안하는 새로울 방식의 유지방전 구동파형은 기존의 유지 방전 펄스인 스퀘어 펄스와는 다르게 계단형의 펄스를 사용하는 방식으로 방전이 일어나기 전까지 일정한 전압을 인가하여 유지시킨 뒤 어느 시점에서 방전되기까지 전압을 올려주는 방법으로 PDP의 협소한 방전 영역을 증가시킴으로써 고휘도를 얻을 수 있다. 실험 결과 기존의 유지펄스와 비교하여 39.4%의 휘도와 50.0%의 효율 향상을 얻을 수 있었다.

• KIEE International Transactions on Electrophysics and Applications
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• v.3C no.2
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• pp.35-42
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• 2003

This paper proposes a relative lifetime test method of MgO thin film. The suggested test conditions are 5$0^{\circ}C$, 400Torr, 20% over-voltage and 300KHz. The relative lifetime of MgO thin film is significantly affected by the MgO preparing conditions and Xe partial pressure. As result, the lifetime of the AC plasma display panel (PDP) is increased with an MgO thickness of 2000$\AA$ to 8000$\AA$ but is saturated over 5000$\AA$ (up to 9000 $\AA$). In addition, as Xe partial pressure increases, AC PDP lifetime increases.