• Title/Summary/Keyword: Discharge Delay

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Discharge delay reduction by controlling the roughness of dielectric surface in AC PDP

  • Seo, Ki-Ho;Whang, Ki-Woong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.1491-1494
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    • 2006
  • We report a method for reducing the address discharge delay. The address discharge delay was reduced when the MgO protective layer was made on the dielectric area which was made rough intentionally. The delay reduction was more pronounced in the formative delay.

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Characteristic of High Voltage Aging in AC PDPs

  • Lee, Yong-Han;Kim, Oe-Dong;Ahn, Byoung-Nam;Choi, Kwang-Yeol;Kim, Sung-Tae
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.932-934
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    • 2006
  • A relationship between discharge delay time and the aging method were investigated: A-Y (Address electrode - Scan electrode) aging and conventional X-Y(Common electrode - Scan electrode) aging with the variation of sustain voltage beyond self-erasing discharge. Although A-Y aging decreases discharge delay time, it has several drawbacks like non-uniformity of discharge, degradation of luminous efficiency and a color temperature. In a conventional aging condition which is carried out near the mid-margin voltage, discharge delay time is short in low voltage and high frequency condition. As an alternative to conventional voltage aging, high voltage aging is suggested which is carried out at self-erasing sustain voltage region. High voltage aging shows lower discharge delay time and fast aging speed than conventional voltage aging.

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Factors Affecting Discharge Delay in Lumbar Spinal Surgery Patients Who were Treated according to a Critical Pathway (표준진료지침을 적용한 요추 수술 환자의 퇴원 지연에 영향을 미치는 요인)

  • Kim, Jeoung Hee;Lee, Eun Ha;Kim, Su Ran;Kim, Sung Reul
    • Korean Journal of Adult Nursing
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    • v.28 no.1
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    • pp.43-52
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    • 2016
  • Purpose: The aim of this study was to identify demographic, clinical, physical, and psychosocial factors affecting discharge delay in lumbar spinal surgery patients who were treated according to a critical pathway. Methods: A sample of 170 patients with lumbar spinal surgery agreed to participate in the study, between April 1, 2014 and August 30, 2015. Data were analyzed by mean, standard deviation, t-test, ${\chi}^2$-test, ANCOVA, and logistic regression analysis using SPSS 22.0 program. Results: Approximately fifty-nine percent of the participants was delayed discharge. On logistic regression analysis, female gender (OR=2.63, 95% CI=1.40~4.94), age (OR=1.03, 95% CI=1.01~1.05), spondylolisthesis (OR=4.49, 95% CI=1.90~10.61), and spinal fusion operation (OR=4.14, 95% CI=1.89~9.05) were significant factors predicting discharge delay of the participants. However, discharge delay was not related with pain, physical function, depression, or family support. Conclusion: An analysis of discharge delay may assist in evaluating and revising critical pathway for optimal care. In addition, nurses need to understand the factors affecting discharge delay of the given population who were treated according to a critical pathway.

A study on the discharge characteristics of AC PDP depending on delay time (AC PDP의 delay time에 따른 입자들의 방전특성 연구)

  • Lee, D.K.;Lee, H.J.;Kim, D.H.;Lee, H.J.;Park, C.H.
    • Proceedings of the KIEE Conference
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    • 2004.07c
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    • pp.1751-1754
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    • 2004
  • Effects of delay on the discharge time lag and the controllability of weak discharge mode were studied under single cell driving circumstances of ac PDP. It was found that sufficient number of priming particle is necessary for inducing weak discharge in ramp voltage driving. Discharge time lag was reduced dramatically under priming condition. It is speculated that the increasement of strong discharge is related to the reduction of the $Xe^*(^3P_1)$ particles during the after glow.

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Relationship between Exo-electron Emission Currents and Glow Discharge Delay of ACPDP

  • Hong, Cho-Rong;Yoon, Sang-Hoon;Kim, Yong-Seog
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1053-1056
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    • 2008
  • The effects of wall charge and bias voltage on exo-electron emission currents were examined. In addition, the effects of doping elements on the currents were investigated. These results indicated that the statistical delay is inversely proportional to the exo-electron emission currents measured.

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A study on the effect of discharge in a multiple spark ignition engine (다회수 스파크 점화기관의 방전효과에 관한 연구)

  • 이성열;한병호
    • Journal of the korean Society of Automotive Engineers
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    • v.11 no.5
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    • pp.55-64
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    • 1989
  • The effect of discharge have been investigated for condition of spark in a multiple spark ignition engine, as the spark duration, capacitive and inductive discharge energy were calculated for condition of spark by ignition wave and energy formula. The useful portion of spark discharge is divided into capacitance portion and inductance portion. It was found that capacitive discharge energy and spark duration were increased according to increasing number of spark, and inductive discharge energy was increased according to increasing spark interval. Therefore engine torque was increase and lean misfire limit was extended comparing with the standard ignition system. It found that spark energy was discharged within ignition delay period availability acted on the formation and growth of flame kernel, and total spark energy was increased according to increasing number of spark times, but discharged spark energy after ignition delay became unavailable energy. And the capacitive discharge energy has the dominant effect for stoichiomeric or not very rich air-fuel mixture but inductive discharge energy has the dominant effect for lean air-fuel mixture.

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The effect of the MgO process on the properties of AC-PDPs

  • Kim, Young-Sung;Park, Min-Soo;Ryu, Byung-Gil
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08b
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    • pp.1376-1379
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    • 2007
  • The effects of the MgO fabrication process on the properties of AC-PDPs were examined. MgO films were deposited by e-beam evaporation with various substrate temperatures and oxygen flow rates. MgO films were analyzed by XRD, CL and ellipsometer. Panel properties such as luminance, efficiency, discharge voltage and discharge delay time were measured with test panels. MgO films with higher temperature, smaller oxygen flow rate showed shorter discharge delay time. Also they showed smaller XRD peak intensity. These results revealed that the discharge delay time was strongly influenced by temperature and oxygen flow rate of the MgO fabrication process.

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The Reduction of Address Discharge Delay Time Using a New Driving Method (새로운 구동방식을 이용한 어드레스 방전 지연시간의 감소)

  • Song, Keun-Young;Kim, Gun-Su;Seo, Jeong-Hyun;Lee, Seok-Hyun
    • Proceedings of the KIEE Conference
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    • 2004.11a
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    • pp.123-125
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    • 2004
  • In order to achieve high efficiency and low cost, new high-speed addressing method is suggested. This can be achieved by reducing the address discharge delay time through the priming effect. This paper suggests a new ADR (Address During Reset) driving method which provides priming particles by using a separated driving method without adding auxiliary electrode or auxiliary discharge. The experimental results show an approximately loons reduction in the formative delay time of address discharge and a reduction in jitter of over 200ns. Also, due to enough time being available for reset, there was a reduction in light emitted during reset of about 29% which improved the dark contrast ratio considerably.

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Study on Characteristics of Write Discharge with Single Sustain Waveform in AC Plasma Display Panel (교류형 플라즈마 디스플레이에서 단일 유지 파형을 가지는 기입 방전의 특성의 연구 )

  • Byung-Gwon Cho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.36 no.1
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    • pp.56-61
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    • 2023
  • The characteristics of write discharge were investigated when the conventional driving method with the unipolar sustain voltages, and the single sustain driving method applying the bipolar sustain voltage were applied in an AC plasma display. In the case of having a single sustain waveform, the strength of the write discharge is weakened compared to the conventional driving method during the address period, because the wall charge inside the panel is more dissipated by the lower scanning voltage. In the driving method with a single sustain waveform, the bias voltage of the other electrodes was changed to improve the write discharge characteristics. As a result, the intensity of the discharge was enhanced by 32% and the delay time was shortened by 60 ㎲.

Discharge Characteristics of AC-PDPs with a grooved front dielectric layer

  • Jeong, Jin-Hee;Lim, Jong-Lae;Kim, Oe-Dong;Choi, Kwang-Yeol;Yoo, Eun-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.1266-1268
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    • 2005
  • The influence of the grooved dielectric layer on discharge and luminous characteristics has been investigated for various depths of the groove to achieve a high luminance efficiency AC-PDP operated at a lower voltage. We use the voltagethreshold curve technique and address delay jitters to explain the discharge characteristics. It shows that the surface discharge voltage rely on the depth of the grooved dielectric layer. Vertical discharge voltage remains almost the same as the groove depth increases. The influence of the grooved dielectric layer on discharge and luminous characteristics has been investigated for various depths of the groove to achieve a high luminance efficiency AC-PDP operated at a lower voltage. We use the voltagethreshold curve technique and address delay jitters to explain the discharge characteristics. It shows that the surface discharge voltage rely on the depth of the grooved dielectric layer. Vertical discharge voltage remains almost the same as the groove depth increases.

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