• Title, Summary, Keyword: Ramp erase pulse

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Effect of ramp-type erase pulse waveform on the high Temperature driving characteristics of ac PDP

  • Choi, Joon-Young;Kim, Dong-Hyun;Heo, Jeong-Eun;Ryu, Sung-Nam;Ryu, Jae-Hwa;Lee, Ho-Jun;Park, Chung-Hoo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.57-60
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    • 2002
  • This paper deals with the effect of ramp-type erase pulse waveform on the high temperature driving characteristics of ac PDP driven by ramp up-down reset waveform. The experimental results show that the discharge characteristics in the reset period are significantly affected by the erase pulse waveform and ambient temperature. The firing voltage is increased with ambient temperature. This can cause misfirings during the sustain period and should be avoided. As one of possible solutions, we propose the optimization of erasing pulse shape.

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The study on the Erasing Magin as an Erasing Discharge Method of AC PDP (AC PDP의 소거 방전 기법에 따른 Erasing Magin 특성에 관한 연구)

  • Kwon, Byung-Dae;Yoo, Choong-Hee;Choi, Joon-Young;Kim, Dong-Hyun;Lee, Ho-Jun;Park, Chung-Hoo
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.26-29
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    • 2002
  • The ramp waveform has recently been introduced to erase wall charges of the previously selected cells for plasma display. However. the ramp waveform can't completely remove wall charges. In this paper. we suggested new erase waveform having a complex with close width pulse and ramp pulse for complete erasing. The erasing margin of suggested waveform is wider than the conventional waveform. Moreover. suggested wave form can reduce the erasing time compared.

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A Study on the Improvement of the High Temperature Misfiring in AC PDP (AC PDP의 고온 오방전 개선에 관한 연구)

  • Choi, Joon-Young;Ham, Myung-Soo;Park, Chung-Hoo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.10
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    • pp.1125-1131
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    • 2004
  • Misfiring is usually observed at high ambient temperature in plasma display panel (PDP). This leads to bad image quality and limits the productivity of PDP industry. In this paper, experimental observations and improvement on the misfiring at high ambient temperature have been studied. In order to reduce the high ambient temperature misfiring different slope of ramp erase pulse corresponding to the temperature are applied. The experimental results show that the suggested method is quite effective for reducing the high temperature misfiring phenomena.

Design of PDP Driving Waveforms for Enhanced Stability

  • Kim, Seok-Il;Jeong, Ju-Young
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.706-709
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    • 2003
  • We made an optimization effort on driving waveforms for the Quantized Memory Addressing (QMA) in selective write mode of operation. It was necessary to add long ramp type erase pulses after the total write pulse and the sustain period to obtain stable intermediate luminance discharges. Furthermore, fast rising ramp type total write as well as two step addressing scheme were adopted for better discharge stability.

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Design of Erase Waveform for Stabilizing Reset Discharge in Mid-gap AC Plasma Display Panels (중간간격을 갖는 교류형 플라즈마 디스플레이 표시기의 소거파형 연구)

  • Yoon, Su-Han;Seo, Jeong-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.5
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    • pp.993-998
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    • 2011
  • In this paper we suggest new criteria for the classification of the electrode gap between common and scan electrodes. The electrode gap is categorized as a short, middle, and long gap according to the criteria. Among these structures, we focus on the erase waveform of a mid-gap structure. we report an unstable discharge arising from the erase ramp period in a mid-gap structure. Based on the Vt close curve, we analyze the unstable discharge at various conditions. Our analysis reveals that the unstable discharge is ignited between surface electrodes and caused by un-erased wall charges accumulated on the outer edges of electrodes. By reducing the voltage level of the last sustain pulse, the problem is solved.

Selective Reset Waveform using Wide Square Erase Pulse in an ac PDP (AC PDP에서의 대폭소거방식을 이용한 선택적 초기화 파형)

  • Jeong, Dong-Cheol;Whang, Ki-Woong
    • 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.

A New Driving Method for Gray-scale Expression in an AC Plasma Display Panel (교류형 플라즈마 디스플레이 패널에서 계조표현을 위한 새로운 구동방식)

  • 김재성;황현태;서정현;이석현
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.53 no.8
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    • pp.407-414
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    • 2004
  • In this paper, a new gray scale expression method that divides the scan lines into multiple blocks is suggested. The proposed method can drive 16 sub-fields per 1 TV field in the panel with XGA ($1366{\times}768$) resolution. The on and off states of even subfields depend on the condition of odd subfields. The write address mode is used in the odd subfields, while the erase address mode is used in the even subfields. Because the ramp reset pulse is applied every 2 sub-fields, both the contrast ratio and the dynamic voltage margin are sufficiently obtained in comparison with previous AWD (Address While Display) methods. In realizing 16 subfields, shortening the scan time in the erase address period was important. The X bias voltage in the erase address period affected the minimum address voltage but did not the delay time of the address discharge. The delay time of the address discharge was affected by the address voltage and the time interval between the last sustain discharge and the scanning time. We also evaluated the dynamic false contour. New method shows an improved image quality in horizontal moving, but discontinuous lines were observed at the boundaries of each block in vertical moving