• Title/Summary/Keyword: PDP

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A Selecting Message Forwarding Nodes for Low-Cost Broadcasting in Ad Hoc Networks using Directional Antennas (방향성 안테나를 이용하는 애드 혹 네트워크에서의 저비용 브로드캐스팅을 위한 메시지 전달 노드 선정)

  • Park, Jeong-Woon;Tscha, Yeong-Hwan
    • Journal of Korea Multimedia Society
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    • v.10 no.1
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    • pp.94-101
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    • 2007
  • Partial dominant pruning(PDP) is regarded as the most practical scheme, reducing redundant messages arisen in broadcasting over ad hoc networks, in such a way that only part of nodes are allowed to forward the received broadcast message. In this paper we propose an extend PDP version called DPDP(directional PDP) such that it reduces not only the number of selected forward nodes, but also the number of antenna elements deployed by the forward nodes. It turns out through simulation that as the number of antenna elements increases, the number of selected forward nodes by DPDP slightly outnumbers that obtained using PDP but both the number of antenna elements deployed by the forward nodes and the redundancy ratio of the received message per node always outperform respectively those given by PDP.

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Influence of surface geometrical structures on the secondary electron emission coefficient $({\gamma})$ of MgO protective layer

  • Park, W.B.;Lim, J.Y.;Oh, J.S.;Jeong, H.S.;Jeong, J.C.;Kim, S.B.;Cho, I.R.;Cho, J.W.;Kang, S.O.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.806-809
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    • 2003
  • Ion-induced secondary electron emission coefficient $({\gamma})$. of the patterned MgO thin film with geometrical structures has been measured by ${\gamma}$ - FIB(focused ion beam) system. The patterned MgO thin film with geometrical structures has been formed by the mask (mesh of ${\sim}$ $10{\mu}m^{2})$ under electron beam evaporation method. It is found that the higher ${\gamma}$. has been achieved by the patterned MgO thin film than the normal ones without patterning.

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Adsorption properties of MgO protective layer in AC PDP

  • Manakhov, Anton;Nikishin, Nikolay;Hur, Min;Heo, Eun--Gi
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.384-387
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    • 2008
  • We have studied the adsorption of contaminations on the MgO protective layer by Thermal Desorption Spectrometry (TDS). The result shows that the increase in exposure time, MgO thickness and humidity multiply the quantity of adsorbed contaminations. It is also found that the desorption activation energy and contamination quantity is decreased by the additional firing process of MgO layer under oxygen environment.

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PIV Measurement on the Flows of PDP(Plasma Display Panel) (PDP 유동장 PIV 계측)

  • Doh, D.H.;Cho, G.R.;Pyun, Y.B.;Song, J.S.;Baek, T.S.;Jung, W.M.
    • Proceedings of the KSME Conference
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    • 2001.06e
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    • pp.733-737
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    • 2001
  • Heat generated from the electronic parts in PDP is undesirable physical properties. To attain optimal arrangement of the electronic parts in PDP, thermal flows in PDP should be analyzed. PIV measurement has been made to quantify the characteristics of the inner flows and outer flows of an actual PDP. The quantity of heat flux from PDP has been estimated using the PIV results. Measurement system consists of Ar-ion laser, CCD camera and an image grabber installed on a host computer.

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Effect of Various ${\prod}$Type Metal Electrode in the AC PDP (AC PDP에서 다양한 형태의 ${\prod}$형 금속방전유지 전극의 효과)

  • Yoo, Su-Bok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.3
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    • pp.586-590
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    • 2009
  • Recently, an AC Plasma Display Panels(PDP) with the metal sustain electrodes have been reported in order to reduce the manufacturing cost of the AC PDP. However, the luminance and efficacy of the AC PDP with metal electrodes are worse than those of the AC PDP with ITO electrodes. In this paper, various ${\prod}$type metal electrodes are suggested, in order to improve the electro-optical characteristics of the AC PDP with metal electrodes. Among the suggested electrode types, luminance of Hump electrode structure is higher by $40\;cd/m^2$ and discharge current of Asymmetry electrode structure is lower by 5% than those of Pi electrode structure, respectively. Moreover, $T_1$ of Hump electrode structure is reduced to 10% as compared with Pi electrode structure in address period for ADS driving scheme. In all aspects, the characteristics of Hump and Asymmetry electrode structure show best performance.

Individual role of manufacturing steps in PDP system contamination and their specific impact on ultimate operational parameters

  • Riva, Mauro;Bonucci, Antonio;Tominetti, Stefano;Carretti, Corrado;Han, Yong-Gyu;Hong, Sung-Hee;Choi, Eun-Ha
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1448-1451
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    • 2008
  • In this paper we investigate, on the basis of experimental data, the correlations between contamination issues occurring during production process steps and final PDP operational parameters: these reciprocal relations are the result of dynamic equilibria established within the PDP system, amongst residual gases and sorbed species interacting with heat, ions and photons.

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Development of Novel Electrode Materials for Plasma Display Panel

  • Kim, Chul-Hong;Chae, So-Ra;Lee, Min-Hee;Jeong, Hyun-Mi;Kim, Beom-Kwon;Heo, Eun-Gi;Choe, Deok-Hyeon;Lee, Byung-Hak
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1437-1440
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    • 2008
  • In this paper, we mainly deal with metallic electrode materials and patterning processing of plasma display panels. We focus on the recent development status, where low cost and high performance electrode materials such as Ag-based single-layered bus, low cost-in-use and anti-migration address electrodes are briefly introduced. The technological trends and further works on novel electrode materials and processing are also discussed.

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