• 제목/요약/키워드: W-beam

검색결과 1,046건 처리시간 0.034초

Influence of constraint MgO deposition onto phosphors on luminance properties in AC Plasma Display Panels

  • Jeoung, Jin-Man;OH, P.Y.;Moon, M.W.;Lee, J.H.;Jeong, J.E.;Lee, H.J.;Han, Y.K.;Lee, S.B.;Jeong, S.H.;Yoo, C.K.;Yoo, N.R.;Choi, E.H.;Ko, B.D.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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    • pp.1215-1217
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    • 2005

  • One of the important problems in recent AC-PDP technology is the image sticking. In this research, we have investigated the PDP cell with constraint deposition MgO on phosphor, the electrical and optical properties in the PDP cell were examined. Also, we have investigated the correlation with image sticking and degraded MgO protective layer, phosphor in AC-PDP. As a result, we measured the secondary electron emission coefficient ${\gamma}$, discharge characteristics and Brightness for the constraint degraded phosphor are compared with those of nondegraded phosphor.

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Measurement of ion induced secondary electron emission $coefficient({\gamma})$ and work function of vacuum annealed MgO protective layer in AC PDP

  • Lim, J.Y.;Jeong, H.S.;Park, W.B.;Oh, J.S.;Jeong, J.M.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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    • pp.799-801
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    • 2003

  • The secondary electron emission $coefficient({\bullet})$ of vacuum annealed MgO films has been investigated by ${\bullet}$ -focused ion beam(${\bullet}$ -FIB) system. The vacuum annealed MgO films have been found to have higher ${\bullet}$ values than those for as-deposited MgO films for Ne+ ion. Also it is found that the ${\bullet}$ for air-hold of vacuum annealed MgO layers for 24-hours is similar to that for vacuum annealed MgO films without any air-hold.

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OPTICAL PROPERTIES OF AMORPHOUS CN FILMS

  • Park, Sung-Jin;Lee, Soon-Il;Oh, Soo-Ghee;Bae, J.H.;Kim, W.M.;Cheong, B.;Kim, S.G.
    • 한국표면공학회지
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    • 제29권5호
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    • pp.556-562
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    • 1996

  • Carbon nitride (CN) films were synthesized on silicon substrates by a combined ion-beam and laser-ablation method under various conditions; ion-beam energy and ion-beam current were varied. Raman spectroscopy and spectroscopic ellipsometry (SE) were employed to characterize respectively the structural and the optical properties of the CN films. Raman spectra show that all the CN films are amorphous independent of the ion-beam current and the ion-beam energy. Refractive indices, extinction coefficients and optical band gaps which were determined from the measured SE spectra exhibit a significant dependence on the synthesis conditions. Especially, the decrease of the refractive indices and the shrinkage of the optical band gap is noticeable as the ion-beam current and/or the ion-beam energy increase.

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역T형강 합성보의 전단연결에 관한 실험적 연구 (An Experimental Study on the Shear Connection of Inverted T-shape Composite Beam Encased Web)

  • 정재훈;김진무
    • 한국구조물진단유지관리공학회 논문집
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    • 제5권4호
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    • pp.131-138
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    • 2001

  • In inverted T-shape composite beam examine the structural behavior by experiment According to arrangement, type of stud connector, type of shear connector, reinforcement by welding of stirrup and a close analysis we came to these conclusion. 1) The compare result of bending strength according to arrange type of stud connector : A1-W(stud connector located web)specimen is exceed than A1-F(stud connector located flange). 2) B1-N(using prominence and depression of the web by shear connector) specimen is decrease than A1-W(using stud bolt by shear connector)specimen in bending strength and B2-N(reinforced by welding the stirrup to lower flange)specimen is similar with A2-W specimen. 3) According to reinforced by welding the stirrup to flange, the stiffness and bending strength of the beams are increase. A-scries stirrup comparatively low effective in the increase of strength by welding the stirrup to flange because enough composite effect show by stud connector, but B-series stirrup is comparatively high effective in shear connector effect because shortage of prominence and depression of the web.

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The characteristics of AC-PDPs According to binary and ternary gas mixtures of He-Ne-Xe_

  • Lee, H.J.;Son, C.G.;Lee, S.B.;Han, Y.K.;Jeoung, S.H.;You, N.L.;Lim, J.E.;Lee, J.H.;Moon, M.W.;Oh, P.Y.;Jeoung, J.M.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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    • pp.1195-1198
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    • 2005

  • The improvement of efficiency is the one of the most important part in AC PDPs . To achieve high efficiency, high VUV emission efficiency and High ion induces secondary electron emission coefficient are needed. We have measured the emission spectra of vacuum ultraviolet rays and ion induced secondary electron emission coefficient of MgO protective layer in surface discharge AC-PDP with binary and ternary gas mixtures. We have investigated electro-optical characteristics of AC-PDPs to optimum gas mixture for high efficient.

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