• Proceedings of the Korean Ceranic Society Conference
• /
• 2000.10a
• /
• pp.197.2-197
• /
• 2000

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.40 no.7
• /
• pp.474-480
• /
• 2003

We designed and tested a new scan driver output stage. Compared to conventional CMOS structured scan driver IC′s, the new NMOSFET-only scan driver circuit can reduce the chip area and therefore, the chip cost considerably. We confirmed the circuit operation with open drain power NMOSFET IC′s by driving 2"PDP test panel. We defined critical device parameters and their optimization methods lot the best circuit performance.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2003.07a
• /
• pp.768-770
• /
• 2003

In AC PDP, since charges generated by gas discharge are accumulated on the dielectric. The dielectric is a major factor to determine cell capacitance and its memory effect is a play an important role in PDP driving. In this experiment, we have investigated the electro-optical characteristics with dielectric thickness and we have analyzed wall charge and wall voltage by Q-V energy diagram. The dielectric thickness was varied from 20 um to 50 um. As results, according to the dielectric thickness increase,cell capacitance and power consumption is reduced.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.906-909
• /
• 2006

The secondary electron emission coefficient $({\gamma})$ of the cathode is an important factor for improving the discharge characteristics of AC-PDPs because of its close relationship to discharge voltage. In AC-PDPs, MgO is most widely used as a surface protective layer. In this experimental, we have investigated the electronic structure of the energy band structure of the MgO layer responsible for the high ${\gamma}$. The MgO layers have been deposited by electron beam evaporation method, where the $O_2$ partial pressures have been varied as 0, $5.2{\times}10^{-5}$ torr, $1.0{\times}10^{-4}$ torr, and $4.1{\times}10^{-4}$ torr, in this experiment. It is noted that work function that is energy gap between surface and first defect level of MgO layer has the lowest value for the highest O2 partial pressure of $4.1^{\ast}10^{-4}$ Torr.

• Proceedings of the KIEE Conference
• /
• 2003.10a
• /
• pp.182-185
• /
• 2003

본 논문은 AC PDP의 구조, 전극 및 가스등을 기존 방식 그대로 사용하면서 고휘도 방전모드를 구현할 수 있는 새로운 파형의 유지펄스에 관한 연구 결과이다. 기존 PDP 구조에서의 Plasma 방전은 음극영역에서 주된 방전이 발생하기 때문에 Xenon gas의 여기율이 낮아지게 됨으로 충분한 휘도를 얻을 수가 없었다. 이러한 PDP가 갖는 휘도 특성의 문제를 개선하기 위한 목적으로 Panel의 셀구조의 변형, 전극 구조의 변화 또는 방전 가스의 혼합비율조정 둥 다양한 노력과 시도를 계속하고 있다. 하지만 PDP의 생산 단가의 상승을 초래할 수 있으며, 전극 간격을 조절하여 휘도를 개선하는 방식은 화질의 저하시킬 뿐만 아니라 방전전압을 증가시키게 됨으로 소비전력을 증가시키게 된다. 본 연구에서 제안하는 새로운 방식의 유지방전 구동파형은 기존의 유지 방전 펄스인 스퀘어 펄스와는 다르게 계단형의 펄스를 사용하는 방식으로 방전이 일어나기 전까지 일정한 전압을 인가하여 유지시킨 뒤 어느 시점에서 방전 되기까지 전압을 올려주는 방법으로 PDP의 협소한 방전 영역을 증가 시킴으로써 고휘도를 얻을 수 있다. 실험 결과 기존의 유지펄스와 비교하여 39.4%의 휘도와 50.0%의 효율 향상을 얻을 수 있었다.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.17 no.2
• /
• pp.107-113
• /
• 2012

This paper proposes a PDS(Power Transfer Display separation) method for AC-PDP. The proposed PDS method can transfer power and perform an energy recovery by a power conversion circuit operates differently depending on the time. As a result, it uses less of components than conventional PDP power supply and sustain circuit use. Moreover, the manufacturing process can be streamlined. Therefore, the proposed method is suitable for low cost PDP module. To confirm the operation, validity and features of the proposed PDS method, experimental results from a prototype for 42-in diagonal PDP are presented.

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

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2005.05a
• /
• pp.142-145
• /
• 2005

AC-PDP에서 발광 휘도와 발광 효율의 개선은 매우 중요한 과제중의 하나이다. 높은 발광 휘도와 발광 효율을 위해선 VUV의 높은 발광 효율이 요구되어진다. 이 실험에서는 AC-PDP에서 Ne-Xe의 2원 혼합기체와 He-Ne-Xe의 3원 혼합기체의 VUV 발광 세기를 측정하였다. 기체 압력은 200 Torr, 300 Torr, 400 Torr, 500 Torr로 유지하였고, Xe 혼합비는 1%, 2%, 4%, 7%, 10%, 15%를 사용하였다. 진공자외선 발광 세기는 He-Ne-Xe의 3원 혼합기체가 Ne-Xe의 2원 혼합기체보다 발광 세기가 훨씬 높다는 것을 알 수 있었다. 그리고 Xe 함량이 증가함에 따라 공명선인 147 nm의 발광 세기는 Xe 혼합비가 약 10%까지는 증가하다가 10% 이후에는 포화되고, 반면 분자선인 173 nm은 Xe 함량과 가스 압력이 증가함에 따라 발광 세기가 증가하였다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.126-129
• /
• 2006

AC-plasma display panels were examined before and after the aging process to analyze the effect of the aging process. The gas analysis was done to detect the impurity gases out of the MgO film and phosphor by a residual gas analyzer. There were no differences found in the components. The MgO film was analyzed to find out the effect of an ion bombardment due to discharge. The surface roughness of the MgO film was different from regional groups due to the different degree of ion bombardments. XPS analysis showed that the 8 hour aging process was not sufficient to remove $Mg(OH)_2$ and $MgCO_3$ existed on the MgO surface. Photoluminescence measurement showed the small deterioration of blue and green phosphor.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.10 no.3
• /
• pp.226-232
• /
• 2005

Recently, many nation have released standard such as IEC 61000-3-2 and IEEE 59, which impose a limit on the harmonic current drawn by equipment connected to AC line in order to prevent the distortion of an AC Line. Therefore, Plasma Display Panel(PDP) which is highlightened in digital display device also has the Power Factor Correction(PFC) circuit to meet the harmonic requirements. In PDP power module, the conventional boost converter is usually used for the PFC circuit. However, it comes serious thermal problem on it's bridge diode due to heat of PDP, and therefore the system stability is not guaranteed. In this paper, the bridgeless boost converter, which is used for PFC circuit of the PDP power module, is designed and verified the possibility of the application In a practical product in a view of efficiency, component count, temperature and etc.