• Title/Summary/Keyword: Auxiliary Electrode

Search Result 78, Processing Time 0.027 seconds

Reciprocal Sustain and Auxiliary Pulse Waveforms Applied to an AC PDP with an Auxiliary Electrode

  • Choi, Kyung-Cheol;Lee, Sung-Min;Choi, Chung-Sock;Jang, Cheol
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2008.10a
    • /
    • pp.1543-1546
    • /
    • 2008
  • Modified pulse waveforms were applied to an AC plasma display panel with an auxiliary electrode in order to improve the operation voltage margin. Reciprocal sustain pulse waveforms and modified auxiliary pulse waveforms were applied to the sustain and auxiliary electrode, respectively. During the sustain period, the influence of the address electrode on the luminous efficacy of long-coplanar gap discharges was mitigated by application of reciprocal sustain pulse waveforms. Modified auxiliary pulse waveforms maintained the high efficacy obtained from the AC PDP with an auxiliary electrode. The proposed reciprocal sustain and modified auxiliary pulses waveforms can induce stable discharges in long-coplanar gap discharges and can control wall charges with a wider auxiliary pulse voltage margin, thereby enhancing the luminous efficacy of the AC PDP with an auxiliary electrode.

  • PDF

Trust Analysis of Ground Resistance Measurements by the Substitute Auxiliary Electrode (대체 보조전극을 이용한 접지저항 측정 신뢰성 분석)

  • Lee, Sang-Ick;Yoo, Jae-Geun;Jeon, Jeong-Chay;Jeon, Hyun-Jae
    • The Transactions of the Korean Institute of Electrical Engineers P
    • /
    • v.56 no.2
    • /
    • pp.109-114
    • /
    • 2007
  • This paper summarize about the auxiliary electrode measured a ground resistance. The method to measure a ground resistance is the fall-of-potential method to using an auxiliary electrode. And an auxiliary electrode must be set up on the ground. Today it is so difficult to set up the auxiliary electrode on the ground because of many concrete building and many paved roads. So this paper is regarding a trust analysis of the ground resistance measurement by the substitute auxiliary electrode. It substituted a iron structure around the building, a neutral line multiplex ground to earth, a wire net for auxiliary electrode. This information is confirmed bv compared with the measurement value.

Comparison of Ground Resistance Measurement Value by the Substitute Auxiliary Electrode (대체 보조전극을 이용한 접지저항 측정값 비교)

  • Lee, Snag-Ick;Yoo, Jae-Geun;Jeon, Jeong-Chay;Jeon, Hyun-Jae
    • Proceedings of the KIEE Conference
    • /
    • 2007.04b
    • /
    • pp.85-87
    • /
    • 2007
  • This paper summarize about the auxiliary electrode measured a ground resistance The method to measure a ground resistance is the fall-of-potential method to using an auxiliary electrode. And an auxiliary electrode must be set up on the ground. Today it is so difficult to set up the auxiliary electrode on the ground because of many concrete building and many paved roads. So this paper is regarding of the ground resistance measurement by the substitute auxiliary electrode. It substituted a iron structure around the building, a wire net for auxiliary electrode. This information is confirmed by compared with the measurement value.

  • PDF

Effect of auxiliary electrode on the discharge characteristics in AC PDP with long sustain-gap

  • Park, Sang-Dae;Lee, Seung-Hun;Shin, Nam-Hoon;Lee, Kyo-Sung;Park, Sung-Yun;Kim, Sang-Ho;Shin, Bhum-Jae;Choi, Kyung-Cheol
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2004.08a
    • /
    • pp.109-112
    • /
    • 2004
  • The effect of auxiliary electrode on the discharge characteristics in AC PDP with long sustain-gap was investigated. The auxiliary electrode was placed between scan and common electrode. When the pulse was applied to the auxiliary electrode during sustain period, the luminance of Ne + 13%Xe gas-mixture discharge increased and the discharge current decreased. The auxiliary pulse plays a role of improving electron excitation efficiency. When the auxiliary pulse was applied during address period, the address discharge time lag of Ne + 13%Xe gas-mixture could be reduced remarkably.

  • PDF

Characteristics of microplasma modes in a plasma display with an auxiliary electrode

  • Kim, Seung-Hun;Mun, Jeong-Hun;Choi, Kyung-Cheol
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2007.08a
    • /
    • pp.578-581
    • /
    • 2007
  • Microplasma modes generated in a display cell with an auxiliary electrode were investigated in accordance with various coplanar-gaps and plategaps. At plate-gaps shorter than the coplanar-gap, the mode transition voltage of the auxiliary pulse increased with an increase in the coplanar-gap. At longer plate-gaps, the mode transition voltage of the auxiliary pulse decreased with an increase in the coplanar-gap.

  • PDF

A Study on the Improvement of Electrode Installation for Measurement of Ground Resistance through Investigation on the Spot in Buildings (현장조사를 통한 건축물 접지저항 측정용 전극 설치의 개선에 관한 연구)

  • Gil, Hyoung-Jun;Kim, Dong-Woo;Kil, Gyung-Suk
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.25 no.5
    • /
    • pp.92-97
    • /
    • 2011
  • This paper deals with the improvement of electrode installation for measurement of ground resistance through investigation on the spot in buildings. The investigation was carried out for an earthing terminal board for measurement of ground resistance, installation of auxiliary electrode, etc. The criteria value is set up by measuring method of ground resistance in international standard. In case of inadequate installation of auxiliary electrode, a relative error is analyzed and adequate installation method of auxiliary electrode is proposed. As a consequence, it is necessary to write direction of ground and equipment, and separate auxiliary electrode for measurement of ground resistance in order to minimize measuring error.

Discharge Characteristics of a Plasma Display using Vertical Auxiliary Electrodes

  • Moon, Cheol-Hee
    • Journal of Information Display
    • /
    • v.9 no.1
    • /
    • pp.20-25
    • /
    • 2008
  • In a conventional plasma display, the bus electrode was located on the ITO electrode at the outer part of each cell. We propose a new electrode configuration using vertical auxiliary electrodes which play a role of electrically connecting ITO and bus electrodes with the aim of enhancing discharge and luminous characteristics of the PDP (Plasma Display Panel). In this paper, luminance and luminous efficiency of the 3 in.-diagonal test panel are measured with various number of vertical auxiliary electrodes such as 2, 50 and 150. The change in the luminous characteristics is explained in connection with the discharge characteristics of the PDP cells such as current peak, IR emission peak and ICCD picture image.

Toward Efficacy Improvement in a PDP Discharge Cell from Structural Considerations

  • Tachibana, Kunihide
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2009.10a
    • /
    • pp.20-23
    • /
    • 2009
  • The efficacy improvement issues in a unit discharge cell have been approached from the structural considerations. The tested cell designs include (a) a coplanar type with annular auxiliary electrode buried in barrier ribs, (b) a coplanar type with split auxiliary electrodes also burred in barrier ribs and (c) a coaxial type with a floating electrode stacked on the base electrode. From spatiotemporally resolved optical images of near-IR emission taken by a gated-ICCD camera and relative VUV emission intensity estimated by laser absorption spectroscopy, the differences in the discharge and light emission performances of those three cell types have been compared and discussed.

  • PDF

Optimization of Current Distributions of Electroplating on Patterned Substrates with the Auxiliary Electrode (보조 전극을 이용한 패턴된 전극에서의 전류 밀도 분포의 최적화)

  • 김남석;모화동;강탁
    • Journal of the Korean institute of surface engineering
    • /
    • v.28 no.3
    • /
    • pp.164-173
    • /
    • 1995
  • Based on the potential-theory model for secondary current distribution, we could predict the thickness distributions of electroplating on patterned substrates with the different size of the auxiliary electrode. The substrates contain lithographic patterns at each sample geometry. Each sample geometry had different current distribution at the same condition except the size of the auxiliary electrodes. The size effect of the auxiliary electrode on thickness distribution of electrodeposition on patterned electrode was investigated in a series of experiments. Copper was galvanostatically deposited from an acid-sulfate solution in a reciprocating paddle cell. The thickness distributions of the workpiece scale measured by profilometry across the specimen were in good agreement with the current distribution predicted by boundary element method.

  • PDF

Placement Standard Research of Auxiliary Probes when Measuring Ground Impedance (접지임피던스 측정시 보조전극의 배치 기준 연구)

  • Kim, Dong-Woo;Gil, Hyoung-Jun;Kim, Dong-Ook;Lee, Ki-Yeon;Moon, Hyun-Wook
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.60 no.10
    • /
    • pp.1984-1991
    • /
    • 2011
  • Among ground impedance measurement methods, the fall-of-potential method is the most thorough and reliable method. In the fall-of-potential method, ground electrode and auxiliary probes are placed in a straight line, and then, auxiliary potential probe is moved away from the ground electrode. The point at which plotted resistance curve flattens out is taken as right position of auxiliary potential probe. However, in some cases, it is hard to place ground electrode and auxiliary probes in a straight line. Therefore, we provided alternative placement method in this research. The method can be easily applicable to placing auxiliary probes. Also, this paper analyzed and compared ground impedance measurement standards of large grounding systems. Based on the analysis, practical measurement method using an earth tester was proposed. The proposed methods presented in this paper will be useful when determining locations of auxiliary probes in alternative positions, and the methods can be applied practically and easily.