Study on Address Discharge Characteristics Using Wall Charge on Three Electrodes during an Address Period in AC PDP

Cho, Byung-Gwon,Jeong, Yeon Tae,Tae, Heung-Sik Informa UK (TaylorFrancis) 2014 Molecular Crystals and Liquid Crystals Vol.602 No.1

High-speed driving waveform based on reset and address discharge analysis using a Vt closed curve in ACPDPs

Cho, Byung-Gwon,Tae, Heung-Sik Wiley Blackwell (John Wiley Sons) 2008 JOURNAL- SOCIETY FOR INFORMATION DISPLAY Vol.16 No.1

Study on discharge stability of cost-effective driving method based on V_t close-curve analysis in AC plasma-display panel

Cho, Byung-Gwon,Tae, Heung-Sik,Ito, K.,Jung, Nam-Sung,Lee, Kwang-Sik IEEE 2006 IEEE transactions on electron devices Vol.53 No.5

A new cost-effective driving method that can drive plasma-display panel cells without applying any driving waveform to the common electrode is proposed based on a V<SUB>t</SUB> close-curve analysis. In this driving method, it is very important to prevent a misfiring discharge due to the inversion of the polarity of the wall charges accumulated between the scan and address electrodes. The measured V<SUB>t</SUB> close-curve showed that a misfiring discharge caused by the polarity inversion phenomenon of the wall charges on the scan and address electrode could be prevented by minimizing the potential difference between the scan and address electrodes by applying a positive auxiliary pulse to the address electrode, especially while applying the positive sustain pulse during a sustain period. As a result, the proposed cost-effective driving method can reduce the driving cost by about 20% through eliminating the common driving board and successfully display various image patterns, such as the white, red, green, and blue patterns, on a 42-in plasma television without any misfiring discharge.

Study on luminous efficiency of AC plasma display panel with large gap between sustain electrode

Cho, Byung-Gwon,Jeong, Yeon Tae,Tae, Heung-Sik Informa UK (TaylorFrancis) 2017 Molecular Crystals and Liquid Crystals Vol.645 No.1

<P>The luminance and luminous efficiency was investigated in new structure of AC plasma display panel with the large gap between the front electrodes under a high Xe gas mixture when adopting the proposed driving waveform. As an electrode was far from the other on the front plate comparing to the conventional structure, the driving waveform, especially in the reset and sustain period, should be modified. Therefore, during the reset period, the negative voltage was applied to the sustain electrode to produce the surface discharge between the scan and sustain electrodes. In addition, the sustain waveform was also modified to induce the surface discharge between the front plates after the triggering was made between the front and rear plates. As a result, when the modified driving waveform with the positive sustain voltage of 140V and negative triggering voltage of -110V during a sustain period applied to the panel with Xe gas mixture of 15% and the sustain gap of 500 um, the luminance of 340 cd/m(2) and luminous efficiency of 3.26 lm/W were obtained in the 42-inch AC PDP.</P>

A new driving waveform for improving luminous efficiency in AC PDP with large sustain gap under high Xe content

Cho, Byung-Gwon,Tae, Heung-Sik,Ito, K.,Song, Jun Weon,Jung, Eun Young,Ahn, Jeong Chull,Jung, Nam-Sung IEEE 2006 IEEE transactions on plasma science Vol.34 No.2

A new driving waveform is proposed to improve the luminous efficiency of alternating current (ac) plasma display panel with a large sustain gap (400 μm) structure under a high Xe (15%) gas mixture. Due to the large sustain gap structure, the reset waveform was modified based on Vt close curve analysis to produce the surface discharge between the scan and sustain electrodes by applying the negative bias voltage on the sustain electrode during a ramp-up period. During a sustain period, the sustain waveforms with two different voltage polarities, i.e., positive and negative voltage levels, were applied, thus resulting in producing an efficient discharge by accumulating the wall charges uniformly among the three electrodes. As a result of adopting the proposed driving waveform, the luminance of 330 cd/m<SUP>2</SUP> and luminous efficiency of 4.5 lm/W under the sustain voltage of 210 V and the trigger voltage of 160 V were obtained in the 6-in plasma display panel (PDP) with green phosphors under a large sustain gap (400 μm) and a high Xe (15%) gas mixture.

Simulated results of plasma discharge in AC plasma display panel with asymmetric electrode

Cho, Byung-Gwon,Jeong, Yeon Tae,Park, Choon-Sang,Tae, Heung-Sik Informa UK (TaylorFrancis) 2017 MOLECULAR CRYSTALS AND LIQUID CRYSTALS - Vol.651 No.1

<P>The cost of the driving circuit could be reduced in the AC type plasma display if one of the two electrodes on upper plate was grounded and the driving circuits were used at only the other electrodes. However, when this new driving waveforms were applied to the conventional panel structure, it had been found that the misfiring discharge occurred during the sustain period even though the address signal was not applied. Since the misfiring discharge during the sustain period occurred between the scan electrode at the upper plate and the address electrode at the lower plate, it is possible to prevent the misfiring discharge by applying the additional voltage to the address electrode at the time of applying the positive sustain voltage. On the other hand, since the application of the address voltage during the sustain period causes the power loss of the drive circuit and the shortening of the lifetime in the circuit component, a panel having the asymmetric electrode structure in which the width of the scan electrode on the upper plate is narrower than other electrodes has been proposed. The reason for only reducing the width of the scan electrode on the upper plate is to prevent the misfiring discharge area with the facing address electrode on the lower plate. As a result, it could be confirmed that the misfiring discharge was prevented by the asymmetric electrode structure using the discharge and wall charge simulations.</P>

Address Discharge Simulation of Additional Pulse Application to Common Electrode in AC PDP

Cho, Byung-Gwon,Jeong, Yeon Tae,Tae, Heung-Sik Informa UK (TaylorFrancis) 2015 MOLECULAR CRYSTALS AND LIQUID CRYSTALS - Vol.617 No.1

교류형 플라즈마 디스플레이에서 Vt 폐곡선 분석에 기초한 개방형 유전체 구조에서의 수정된 구동파형

조병권 ( Byung Gwon Cho ) 한국화상학회 2013 한국화상학회지 Vol.19 No.4

AC PDP의 Vt 폐곡선 측정에 의하여 개방형 유전체 구조에서 방전 전압과 내부 벽전압 등의 방전 특성이 종래의 구조와 비교되어 조사되었다. 개방형 유전체 구조는 상판 전극사이의 유전체를 없애서 유지 전극간의 방전이 더욱 쉽게 발생하도록 하는 구조이다. 개방형 유전체 구조에서 상판의 두 전극인 주사와 유지전극 간 방전 개시전압이 종래의 구조와 다르기 때문에 종래의 기입파형을 포함한 초기화 파형도 수정되어져야 한다. Vt 폐곡선 분석에 기초하여 개방형 유전체 구조에 적합한 수정된 구동파형이 제안되었고 42인치 AC PDP에서 실험되었다. The discharge characteristics of a open dielectric structure, especially such as a firing voltage and related wall voltage, were investigated by measuring the Vt close curve. The open dielectric structure could easily produce the discharge between the scan and the sustain electrodes by erasing the dielectric layer between two electrodes. Due to the changes in the discharge firing characteristics of the open dielectric structure between the scan and the sustain electrodes, the conventional reset waveform including the address waveform needed to be modified. Based on the Vt close curve analysis, the modified driving waveform suitable for the open dielectric structure was proposed and examined under the 42 inch AC PDP.

플라즈마 디스플레이의 개방형 유전체 구조에서 기입방전특성을 향상시키기 위한 Vt 폐곡선 분석

조병권(Byung-Gwon Cho) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.1

교류형 플라즈마 디스플레이에서의 Vt 폐곡선 측정에 기초하여 개방형 유전체 구조에서 방전 전압과 내부 벽전압 등의 방전 특성이 종래의 구조와 비교되어 조사되었다. 일반적인 교류형 플라즈마 디스플레이의 구조에서 상판은 유리, 전극, 유전체 등으로 이루어져 있는데, 개방형 유전체 구조는 상판 전극사이에 있는 유전체를 제거하여 상판에 있는 유지 전극간의 방전이 더욱 쉽게 발생하도록 하는 구조이다. 개방형 유전체 구조는 종래의 구조와 다르기 때문에 종래의 구동파형으로 구동시에 여러 가지 문제가 발생한다. 특히 상판의 두 전극인 주사와 유지전극 간 방전 개시전압이 달라지기 때문에 종래의 기입 파형을 포함한 초기화 파형도 수정되어야 한다. 본 연구에서는 종래와 개방형 유전체 구조에서 3 전극의 방전개시전압을 비교하기 위하여 Vt 폐곡선을 측정하였고 분석에 기초하여 개방형 유전체 구조에 적합하도록 구동파형이 수정되었다. The discharge characteristics of an open dielectric structure were investigated, especially such as a firing voltage and related wall voltage, compared with conventional panel structure based on the Vt close curve measurement in AC plasma display panel. While the front panel of the conventional structure in AC plasma display panel was composed of the glass, electrodes, and dielectric, the open dielectric structure could easily produce the discharge between the scan and the sustain electrodes by erasing the dielectric layer between two electrodes. As the open dielectric structure differ from the conventional structure, various problems were produced when driving with the conventional driving waveform. Especially, due to the changes in the discharge firing characteristics of the open dielectric structure between the scan and the sustain electrodes on the front panel, the conventional reset waveform including the address waveform needed to be modified. In this study, the Vt close curves were measured to compare the discharge firing voltages on three electrodes in the conventional and open dielectric structure and based on the Vt close curve analysis, the modified driving waveform suitable for the open dielectric structure was proposed.

AC PDP에서 공통전극에 펄스인가에 의한 플라즈마 방전의 시뮬레이션 결과

조병권 ( Byung Gwon Cho ) 한국화상학회 2015 한국화상학회지 Vol.21 No.4

교류형 플라즈마 디스플레이에서 기입기간 중 방전지연시간을 단축시키기 위하여 공통전극에 추가펄스 인가하였을 때의 플라즈마 방전이 시뮬레이션 되고 기입 광파형이 측정되었다. AC PDP의 초기화 기간 동안 셀 내부에는 벽전하가 쌓이고 그것들은 기입 기간에 주사와 기입펄스에 의해 기입방전을 트리거링 시키기 위하여 이용되어진다. 그러나 종래에는 공통전극에는 DC 바이어스 전압에 의해 음의 전하는 기입방전에 이용되지 못하므로 방전지연시간의 단축은 한계가 있다. 만약 주사와 기입전극의 전하뿐만 아니라 공통전극의 음의 전하를 이용한다면 방전지연시간은 단축될 것이고 이를 확인하기 위하여 기입기간 동안 3 전극에 펄스가 모두 인가될 때, 진공 자외선을 발생시키는 Xe 3P2 의 에너지 상태가 시뮬레이션 되었다. 또한 종래의 구동방법과 공통 전극에 추가 펄스를 인가한 경우에 기입방전의 광파형의 단축을 각각 측정되었다. The plasma discharge are simulated and the light waveforms are measured to shorten the address discharge time during an address period in AC PDP when the additional pulses are applied to the common electrodes during an address period. The wall charges in a cell are accumulated on three electrodes during a reset period in AC PDP and those are utilized to produce the triggering for the address discharge between the scan and address electrodes during an address period. However, as the negative charges cannot be utilized by the DC bias voltage on the common electrode in the conventional driving method, it is difficult to shorten the discharge delay time. If the negative charge on the common electrodes as well as the charges on the scan and address electrode are utilized, the address delay time can be shortened. In this study, the Xe 3P2 energy state to generate the vacuum ultraviolet are simulated when the scan and address pulses on two electrode are applied including the additional pulses on the common electrodes. In addition, the address discharge light waveforms in the conventional and the proposed driving method are measured.