• Proceedings of the KIEE Conference
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• 2006.07c
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• pp.1544-1545
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• 2006

In this paper, we present a new reset waveform for a large-sustain-gap structure in at PDPs. In the driving of the large-sustain-gap structure with a conventional ramp reset waveform, we cannot avoid the condition of an address being a cathode, which causes lots of trouble in stabilizing a reset discharge. To solve these problems, we use the square pulse instead of the conventional rising ramp pulse. Before making a strong discharge between the address (cathode) and scan (anode) electrodes, we make a priming discharge between the address (anode) and the scan (cathode) electrodes to stabilize the strong discharge in which the address electrodes are the cathode. With this scheme, we obtained 60V minimum address voltage and 145V maximum address voltage in $250{\mu}m$ and $350{\mu}m$ gap structures.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.8
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• pp.27-33
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• 2007

A novel priming discharge technique in which the ramp shaped priming pulse is superposed on the sustain period so that the entire plasma display panel (PDP) is discharged at the same time with a single drive circuit is proposed. From the experimental results, it is ascertained that the priming discharge is ignited only in a pixel in which sustain discharge does not occur and it has been understood that the priming pulse hardly influences the sustain discharge. Moreover, high-speed driving with address pulse widths of 0.7[${\mu}s$] was achieved and a wide address voltage margin of 40[V] was obtained by using the drive method applied the proposed priming discharge technique. In these results, full-HDTV PDP with 1080 horizontal scanning lines can be driven without decreasing the brightness and the possibility of the commercializing is also high because this technology is designed for using the commercialized driver IC.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1315-1317
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• 2008

The plasma display panel is an image expression display using gas discharge. However gas discharge characteristics vary with temperature. Furthermore, the potential difference among three electrodes appears in sustain period due to external applied voltages. It affects to the wall charge state accumulated on the electrodes. This research aims at identifying that the discharge characteristics depend on the potential difference and temperature. The results show that the wall charge loss increases with increase of the number of applied pulse during sustain period and it severely appears at high temperature.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.609-612
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• 2002

A new reset waveform is proposed for reducing the reset period. A square pulse is applied to the address electrode while reset pulse ramps and before a discharge between the sustain electrodes occurs. The square pulse induces a discharge between the address electrode and the X electrode, and the induced wall charge is opposite to the applied ramp pulse. Thus, the next discharge between the sustain electrodes becomes weaker. The weaker discharge lowers background luminance and improves contrast ratio. Thus, the new reset waveform can reduce ramp up time in the ramp reset waveform The experimental results show that the ramp up time can be reduced by about 90% compared with the conventional ramp reset waveform.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.3
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• pp.577-583
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• 2011

In AC-PDP, it is necessary to achieve high luminance efficiency, high luminance and high definition by adopting technologies such as high xenon concentration and long gap. However, it is very difficult to apply above technologies because they make many problems such as mis-discharge and high driving voltage. Especially, the reactive power of PDP must be reduced for satisfaction in international standard IEC62087. In this paper, we proposed CLHS driving method which is half sustain driver without energy recovery capacitor. In the experimental results, CLHS driving method reduced reactive power consumption about 10%. Also, CLHS driving method improved the luminance efficiency in all discharge loads. Therefor, the more the discharge load decreases, the more the luminance efficiency improves. When the discharge load is 20%, CLHS driving method improved 5.35%.

• Journal of Power Electronics
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• v.6 no.4
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• pp.298-306
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• 2006

A high efficiency and low cost sustain driver for a plasma display panel (PDP) utilizing a current pumping method is proposed. The main concept of the proposed circuit is using the current source to charge and discharge the panel. As a result, all power switches can achieve zero voltage switching (ZVS) and every auxiliary switch can also achieve zero current switching (ZCS). Since the inductor current can compensate for the discharge current, the current stress of all the power switches can be reduced considerably. Furthermore, it has features such as a simpler structure, less mass, lower cost, and lower electromagnetic interference than in previous circuits.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2005.11a
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• pp.35-38
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• 2005

Full-HDTV급 PDP를 구현하기 위해서는 고속 어드레스 구동이 필요하며 이러한 기술은 AWD 구동방식으로 구현하는 것이 용이하다. AWD 구동방식은 하나의 sustain 펄스 휴지기안에 복수개의 scan 펄스를 설치하는 것이 바람직하며 이 경우 sustain 펄스와 sustain 펄스 사이가 넓어진다. 본 연구에서는 이 휴지기를 고려한 sustain 방전특성을 해석하였다. 실험결과 address 바로 다음에 나오는 첫 번째 sustain 펄스는 공간전하 의존도가 높으며 두 번째 펄스부터는 공간전하 의존도보다는 벽전하 의존도가 더 높다는 사실을 알았다. 또한 수십${\mu}s$를 가지는 휴지기간에도 균일한 sustain 동작마진을 얻을 수 있음을 알았다.

• 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.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.175-176
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• 2000

Electric fields and the wall voltages in a surface-type AC PDP cell were measured using a Laser Induced Fluorescence Spectroscopy. For the condition of He 100Torr, 200V sustain voltage and 50kHz sustain frequency, the wall voltage dropped from about 50V to about -75V within $1{\mu}sec$ after the main discharge. And the wall voltage decreased with the rate of $10.8V/{\mu}sec$ due to the accumulation of the space charges after $1{\mu}sec$. But when the operating pressure was 40Torr, it increased with the rate of $4.5V/{\mu}sec$ because the diffusion effect of the wall charge on MgO surface was more dominant than the accumulation effect of the space charges. During the pulse-off period, the wall voltage decreased slightly due to the diffusion of the wall charge. When the sustain voltage was 250V, the self-erasing discharge occurred, and the absolute value of the wall voltage decreased rapidly just after the pulses were off, which was caused by the accumulation of the charges generated by the self-erasing discharge.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1391-1392
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• 2007

A selective reset waveform which can improve the dark room contrast ratio in a large sustain gap structure is suggested in this paper. When conventional selective reset discharge is performed, frequent unexpected misfiring happens because of high Vxb and much quantity of negative wall charge formed on Y electrode during final sustain period. The misfiring between sustain electrode and address electrode can be removed by lowering Vxb value and the misfiring between address electrode and scan electrode can be prevented by applying last sustain pulse of 40us and rectangular pulse of Vscan on Y electrode. When the selective reset waveform has one time reset per 8 subfields, black luminance of 1.55 cd/m2 can be obtained without any misfiring.