• 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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• 2000.11c
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• pp.565-567
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• 2000

In this paper, the discharge characteristics of AC PDP, one of the leading technologies currently under development for large-area flat displays, is computed by using Finite Element Method(FEM) combined with Flux-corrected Transport(FCT) algorithm. Up to now, many simulations of AC PDP have been mainly done by Finite Difference Method(FDM). But we simulated the AC PDP by using FEM-FCT method which discretizes the region of interest with unstructured grids. FEM-FCT method can reduce the computational cost because of refining locally where the physical quantities have steep gradients and is more efficient in solving discharge problems, such as a AC PDP. Results are presented in Ne-Xe(4%) gas mixture for a gas pressure of 400 Torr and as the discharge proceeds, the space and time variations of the electron and ion densities, potential and wall charges on the dielectric are described. Results from our simulation by FEM-FCT are similar to those from simulation by FDM and are more efficient in computational cost reduction.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.11a
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• pp.111-115
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• 2002

To understand the discharge characteristics in AC-PDP, it is necessary to study on the wall charge behavior. But, it is difficult to measure the wall charge directly. In this paper, the V-Q Lissajous' figure is used to measure the wall charge indirectly and analyze the wall charge behavior. With the V-Q Lissajous' figure, the discharge characteristics of AC-PDP are studied according to vary driving conditions, such as the frequency, pulse duty ratio, and rising & falling time. As a result, the V-Q Lissajous' figure is used to measure the discharge characteristics of the AC-PDP. It is confirmed that firing initial voltage and firing final voltage for discharge are effected by the aboved variables. Related with the wall voltage generation, it is thought that the difference of the slope at the V-Q Lissajous' figure is caused by charged ions inside the dielectric layer.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.760-763
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• 2003

We have investigated the electro-optical characteristics of image sticking in AC PDP. Although Image sticking is one of major factors to determine display quality in AC PDP, so far, it has not being reported why it is occurred and how we can prevent it. In this experiment, we have analyzed the effect of MgO protective layer and phosphor on the image sticking and we have measured the difference of firing voltage, brightness and discharge current between sticking image and normal image in AC PDP. As a result, Phosphor degradation is a more major factor than MgO protective layer and the firing voltage of gas discharge in sticking image is higher than that of normal discharge.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.263-265
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• 2005

In the alternative current plasma display panel(AC-PDP) technology, it is very important to remove the image sticking for improving an image quality. In this paper, we have investigated the driving method of alternative current plasma display panel(AC-PDP) for preventing image sticking. We have investigated the driving method of alternative current plasma display panel(AC-PDP) for preventing image sticking. The preventing method of image sticking was proposed by adopting the Sticking Remove Pulse(SRP). The variation of brightness is most affected by the MgO to be formed at the surface of the phosphor layer. As a result, the image sticking is reduced when the driving method adopted an SRP.

• Proceedings of the IEEK Conference
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• 2000.11d
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• pp.85-88
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• 2000

We present a new approach to analyzing the dynamic false contour noise of AC plasma display panels (PDP), which is known to degrade the image quality severely. Compared with the existing methods that consider only the amount of light emission from PDP during 1 field time, the proposed approach uses the impulse response model of the human vision system and estimates how the human beings actually feel as the function of time. Experimental results using various benchmark sub-field scan algorithms are included.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.574-577
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• 2007

We have measured the excited Xe atoms density in the $1s_5$ metastable states by laser absorption spectroscopy in counter discharged type AC-PDP. This experiment has shown the characteristic of the excited Xe atoms density which is relation to the visible light efficiency of PDP. The density of counter discharged AC-PDP have measured to be $9.47\;{\times}\;10^{13}\;cm{-3}$. The result has been shown to higher value than $1.45\;{\times}\;10^{13}\;cm^{-3}$ of conventional AC-PDP.

• Electrical & Electronic Materials
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• v.13 no.8
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• pp.15-26
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• 2000

플리주마 디스플레이는 시야각이 매우 넓으며 비선형성이 우수하고 수동 행렬 구동이 가능하다. 제조방법이 다른 표시 장치보다 간단하고 대형화가 용이하기 때문에 42인치 이상 대형 표시 장치로 많은 회사에서 플라즈마 디스플레이를 개발 및 상용화 하고 있다. 플라주마 디스플레이는 초기에는 PMD(Pulse Momory Drive) 및 NOA(Nomally On Anode) 방식으로 구동하는 DC PCP를 중심으로 개발되었으나, DC PDP의 소비 전력이 매우 크고 패널의 수명이 짧기때문에 더 이상 개발되지 않고 현재 AC PDP를 중심으로 개발 및 상용화가 되고있다. AC PDP를 구동하는 방법으로 어드레스 구간과 유지 방전구간이 완전히 분리된 ADS(Address Display Seperation) 방식과 유지방전이 진행하는 동나 어드레스를 하는 AWD(Address While Display) 방식이 있다. 그러나, ADS 나 AWD 방식으로 고해상도 고휘도의 PDP를 구동하기가 어렵기 때문에 고해상도의 PDP를 구동할 수 있는 ALiS, MAoD, MASS 방식 등이 개발되었다. 그리고, AC PDP는 유지 방전할 때, 패널에 고전압을 충전하고 방전하기 때문에 패널에서 소모하는 전력이 많아 이를 줄이기위해 에너지 회수 회로를 사용하여 전력 소모를 줄이고 있다. 본 논문에서는 PDP의 구조 및 동작원리에 대해서 설명하고, 계조를 표시하기 위한 구동 방법, 전력 소모를 감소기키기 위한 에너지 회수회로 및 구동회로에 대해서 기술하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.207-210
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• 2002

This paper presents a new driving method that can drive AC PDPs with low voltage and controlled-current for the sustaining period. The discharge current flowing into the AC PDP is limited in this method. Thus, the power consumption for the discharge is reduced and the discharge input power to output luminance efficiency is improved. Experimental results using this driving method showed that we could drive an AC PDP with a voltage source as low as 146 V and that luminous efficiency of 1.33 lm/W can be achieved.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.12
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• pp.2189-2195
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• 2007

In this paper, we propose a newly developed selective reset waveform of a ac PDP using the wide erase pulse technique with the control of address bias voltage. Although it is generally understood that the wide pulse erasing methode shows the narrow driving margin in an opposite discharge type ac PDP, we could obtain a moderate driving margin in a 3-electrode surface discharge type ac PDP. The obtained driving margin shows a strong dependency on the sustain voltage and the address bias voltage. The lower the sustain and the address bias voltage, the wider the driving margin. The pulse width of the proposed waveform is only $10{\mu}s$, which gives additional time to the sustain period, hence increases the brightness. The brightness and contrast ratio increase about 20% together comparing to the conventional ramp type selective reset waveform with the driving scheme of 10 subfield ADS method. The driving margin was measured with the line by line addressed pattern on the white test panel of 2inch diagonal size and the discharge gas was Ne+Xe4%, 400torr.