• Title/Summary/Keyword: current controlled ramp waveform and reset period

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Improvement of the Contrast Ratio and Reduction of the Reset Period by Current Controlled Ramp Wavefrom

  • Lee, Sung-Hyun;Kim, Dong-Hyun;Park, Chung-Hoo;Shin, Joong-Hong;Yoo, Choong-Hee
    • Journal of Information Display
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    • v.2 no.4
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    • pp.39-45
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    • 2001
  • The voltage controlled ramp(VCR) waveform has recently been introduced in the reset period prior to addressing for plasma display. However, this method results in the oscillation of the gap voltage when the ramp rate is increased so as to reduce reset period. In this paper a current controlled ramp(CCR) waveform method in the reset period is suggested. This method can suppress the oscillation of gap voltage under the condition of shorter ramp time. Moreover, the reset time can be reduced by about 30 % compared with the VCR method under the same background luminance.

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Ramp Waveform Generating Circuit for Improving the Contrast Ratio in AC Plasma Display Panel (AC PDP의 Ramp 파형 개선에 따른 Contrast ratio 향상에 관한 연구)

  • Lee, Sung-Hyun;Kim, Dong-Hyun;Kim, Young-Kee;Heo, Jeong-Eun;Shin, Joong-Hong;Lee, Ho-Jun;Park, Chung-Hoo
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1588-1590
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    • 2001
  • The voltage controlled ramp waveform(VCR) has recently been used in the reset period prior to addressing for plasma display. However, in this paper, the current controlled ramp waveform(CCR) which may prevent the oscillation of gap voltage cause current growth and decrease the background luminance has been suggested. As a result, in case of CCR method, the contrast ratio was about 14% increased compared with VCR method, whereas the addressing and sustainin discharge characteristics of CCR method were same with those of VCR method.

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