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25.4
Displaying 1-25 of 25 articles from this issue
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Article type: Cover
Pages Cover1-
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (13K) -
Article type: Index
Pages Toc1-
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (112K) -
N. Uemura, Y. Yajima, Y. Kawanami, K. Suzuki, N. Kouchi, Y. HatanoArticle type: Article
Session ID: IDY2001-1
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe measured the time-resolved emission spectra of vacuum ultraviolet(VUV)and infrared rays from the electrical discharge in an AC plasma display panel(AC-PDP)with Ne-Xe and Ne-Xe-He mixed gases. The spectra were analyzed by means of energy flow kinetics(chemical kinetics), and we clarified both the mechanism of VUV production in AC-PDPs and the effects of helium atoms on the kinetics. Helium atoms play an important role in increasing the transition from higher excited states of Xe to precursor atoms of Xe^*(^3P_2)in the excited state, from which the excited molecules eitting 173-nm photons are formed.View full abstractDownload PDF (589K) -
K. Ishii, T. Yamamoto, S. Ueda, T. Takei, T. Kuriyama, M. Seki, Y. Tak ...Article type: Article
Session ID: IDY2001-2
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to realize a high-resolution postive column PDP, the discharge characteristics of the positive column and the negative glow were measured separately with narrowed cells. It was found that the visible light brightness from the positive column region increases in inverse proportion to decreasing cell width. The luminous efficiency of the narrowed positive column cell did not decrease under a cell width of 0.2mm. This size cell can realize a high definition TV image display on a 60-inch diagonal PDP with high luminous efficiency.View full abstractDownload PDF (627K) -
M. Makino, E. Mizobata, K. TokiArticle type: Article
Session ID: IDY2001-3
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe discharge time lag is the time interval from the application of the voltage to the occurrence of breakdown. The discharge time lag consists of two parts, a statistical time lag(ts)which is the time taken for an electron to be produced, and a formative time lag(tf)which is the time interval between the production of initial electron and the breakdown. We measured characteristics of the discharge time lag at writing procedure in AC-PDPs. The discharge probability(Po), which corresponds to the deviation of ts, decays quickly with exponential functions just after the priming discharge, and decays slowly with 1/(at+b)functions after the quick decay. The intensity of the latter slow decay component depends on the frequency of sustaining discharges. When the frequency of sustaining discharges increases, the slow decay component becoes higher.View full abstractDownload PDF (622K) -
Yukio MURAKAMI, Yoshyikuni HIRANO, Hideomi MATSUZAKI, Hiroshi MURAKAMIArticle type: Article
Session ID: IDY2001-4
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSComputer simulation was used to investigate improvement of the discharge characteristics of a plasma display panel(PDP). We calculated the characteristics using a 1-D code that included the back-diffusion effect of secondary electrons from the cathode due to collisons with gas molecules. In the conventional conditions of a DC-type PDP, the sparking voltage was 276V with γ in a vacuum and increased to, 294V corresponding to the decrease of yield, with γ' in gas. The peak currents with γ and γ' in the pulse discharge were 104μA and 72μA, respectively, and these decreased to about 70%.View full abstractDownload PDF (656K) -
K. Uetani, H. Kajiyama, A. Kato, I. Tokomoto, Y. Koizumi, K. Nose, Y. ...Article type: Article
Session ID: IDY2001-5
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe deposited MgO thin films using an advanced ion-plating(IP)method and conventional electron beam evaporation(EB)method to investigate a relationship between film structures and deposition conditions. The IP films had sharp apexes. The number density of columnar structure in IP films was more than twice of EB films. It was suggested that the oxidation. reaction in IP method was rather promoted than EB method due to the plasma effectView full abstractDownload PDF (889K) -
H. Kajiyama, K. Uetani, A. Kato, I. Tokomoto, Y. Koizumi, K. Nose, Y. ...Article type: Article
Session ID: IDY2001-6
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSSecondary electron emission coefficient(γ)of MgO film prepared by an advanced ionplating method was measured. The γ value of MgO film prepared by an IP method was larger than that of the film prepared that by conventional electron beam evaporation(EB)method. In IP films, fine columnar structures grew vertically from substrate interface and surface morphology was identified well. We supposed that these film structures contributed to the improvement of γemission from MgO film.View full abstractDownload PDF (775K) -
T. Hirakawa, H. Uchiike, S. Zhang, S. Goto, [in Japanese]Article type: Article
Session ID: IDY2001-7
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIon-induced secondary electron emission characteristics of MgAl_2O_4 were measured in order to evaluate the copability to be used for the protecting material of ac-PDPs. It is revealed that the measured results for the samples of MgAl_2O_4 with a various composition of MgO and Al_2O_3 indicate the dependence of the composition of MgO and Al_2O_3 on the γ_i characteristics. From the ultra violet ray transmissive properties it is clarified that the heattreatment for MgAl_2O_4 improves the ultraviolet ray transmissivity.View full abstractDownload PDF (526K) -
Y. Akiba, R. InoueArticle type: Article
Session ID: IDY2001-8
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA new structure AC-PDP using metal barrier ribs for the purpose of high luminance and luminous efficiency was proposed and its characteristics were evaluated by using 3 inches panel experimentally made. The new panel was made of AC-type electrodes with long gap of 0.75mm. Narrow pulse discharge(electric current pulse width : 150nsec)was realized by anode(ground)driving of metel barrier ribs. Furthermore, New sub-field waves were built by adapting to the address-sustain separation method, and stationary portrait and harmony indication were confirmed. We got the performance of white color luminous efficiency of η=2.5lm/W and white color luminance of B=500 cd/m^2. The consumption power P for the VGA wide 42 inches panel was estimated to be 300 W at white color indication. From now on, performance improvements could be expected further by narrow pulse discharge.View full abstractDownload PDF (810K) -
K. Owaki, K. Sawa, T. Shiga, S. Mikoshiba, T. Ohe, K. Toda, T. Ueda, K ...Article type: Article
Session ID: IDY2001-9
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWhen images having high spatial frequency components move on a PDP screen, perceived information is distorted in various ways such as contrast deteriorates, change of the number of the stripes, blur at the edge and new-born stripes. The picture quality cannot be improved only with an increase in the number of the sub-fields. It can neither be improved by employing the sub-field arrangement which is different from the binary-coded schemes. The error diffusion method deteriorates resolution and does not solve the problem. The artifacts can be reduced by a use of the equalizing-pulse technique together with increased number of sub-fields.View full abstractDownload PDF (590K) -
Shuxiu Zhang, Hideki Fujii, Takayuki Onishi, Masataka Kokubu, Michio O ...Article type: Article
Session ID: IDY2001-10
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESS(Ba, Eu)O-MgO-Al_2O_3(BAM)of hexaaluminate, as a blue phosphor of color plasma displays, is investigated on its luminance and deterioration properties. It is well resistant to thermal treatment with composition of Al/(Ba+Eu)=10, however, compositions of Al/(Ba+Eu)over 10 are more resistant to the deterioration of vacuum ultraviolet ray irradiation. It is suggested that both of the deterioration are concerning to crystal structure and defects of the BAM.View full abstractDownload PDF (359K) -
M. Ohsawa, M. Onozawa, T. Kuwahara, K. Ohhira, K. IshizukaArticle type: Article
Session ID: IDY2001-11
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSLuminous discharge current of AC-PDP didn't depend on the action of the drive circuit switch, and we paid attention to that it was cut off by the action of discharge cell's own. We tried to replace power MOs・FETs with high speed IGBTs, and we examined the practical use of IGBT, which has the important merit that saturation voltage of high voltage IGBTs is very small in comparison with high voltage power MOSFET's. The influence of tail current, which is a fault of IGBTs, can be reduced by the combination with AC-PDPs and the newly developed IGBT. Furthermore, the improvement of the PDP brightness characteristics and efficiency in the high current regions were improved, and we found out that the newly developed IGBT was a promising device as a sustain switch element and to for high performance/cost PDP sets.View full abstractDownload PDF (731K) -
Akiyoshi Mikami, Takuya Ikeda, Satoru Sasaki, Kazushi YamamotoArticle type: Article
Session ID: IDY2001-12
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA ternary Zn_<1-x>Mg_xS:Tb, F thin film has been studied for the new green emitting phosphor by a rf-magnetron sputtering technique. The multi-layer structure consisting of Zn_<1-x>Mg_xS:Tb, F and ZnS:Mn was analyzed in terms of color variation and luminance, and compared with that of Zn_<1-x>Mg_xS:Mn/ZnS:Mn stacked phosphor layers. It is possible that the Zn_<1-x>Mg_xS:Tb, F phosphor takes the place of Zn_<1-x>Mg_xS:Mn and ZnS:Tb phosphors as an efficient and pure green emitting active layer for the multicolor EL display with "color by filter" approach. In addition, a theoretical simulation was carried out on the visual appearance of multicolor EL display.View full abstractDownload PDF (726K) -
T. Nakajima, H. Kominami, Y. Nakanishi, Y. HatanakaArticle type: Article
Session ID: IDY2001-13
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSSrS:Cu, F TFEL devices were prepared by the electron beam evaporation and its luminescent properties were investigated. PL spectra of SrS:Cu, F phosphors were measured under excitation with 325 nm of He-Cd laser at room temperature. It was shown that PL spectra, where concentration of Cu was 0.3 at%, showed strong blue emission with a peak at about 470 nm. Standard double insulator structure was employed for EL device fabrication using Y_2 O_3 films as insulating layers and ZnS films as buffer layers. The TFEL devices prepared with rapid thermal annealing at 900℃ showed the same blue emission as PL spectrum. The maximum luminance of 80 cd/m^2 and CIEx=0.13, y=0.22 could be obtained from the device with a Cu content of 0.1 at% by driving at 1kHz pulse.View full abstractDownload PDF (473K) -
Haruki Fukada, Yukihiko Sugio, Dan Sakurai, Naoki Tokuda, Koutoku Ohmi ...Article type: Article
Session ID: IDY2001-14
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe studied the necessary preparation temperature to draw full potential of SrS:Ce luminescence. To improve the crystallization and luminescence efficiency of SrS:Ce phosphor layers, post-deposition annealing at high temperature is necessary. Firing SrS powders above 1000℃ introduces Sr vacancies into the SrS lattice. In the presence of many Sr vacancies, many Ce^<3+> centers are incorporated into the SrS lattice. By adding alkali metal sulfide, it is possible to show high luminescence of SrS:Ce powders for firing temperatures below 1000℃. Alkali metal sulfide co-evaporation may have the potential to reduce the optimum deposition temperature of SrS:Ce thin films.View full abstractDownload PDF (612K) -
Haruki Fukada, Dan Sakurai, Naoki Tokuda, Koutoku Ohmi, Shosaku Tanaka ...Article type: Article
Session ID: IDY2001-15
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSHybrid electroluminescent(EL)devices composed of a BaTiO_3 thick-film dielectric layer and a SrS:Ce thin-gilm phosphor layer have been prepared by electron beam evaporation with H_2S supply. H_2 and/or H reduce the BaTiO_3 layer, and cause dielectric breakdown. The reduction of the BaTiO_3 can be suppressed by cracking H_2S and removing H_2 and H by Ta metal filter. The SrS:Ce hybrid EL device prepared with H_2S cracked at 900℃ shows a maximum luminance of 1260 cd/m^2 and an efficiency of 0.61 lm/W at 1 kHz.View full abstractDownload PDF (550K) -
Tokihiko Ogi, Noboru Miura, Hironaga Matsumoto, Ryotaro NakanoArticle type: Article
Session ID: IDY2001-16
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSBaAl_2S_4:Eu thin films were prepared by conventional electron beam evaporation method. Substrate temperature and post-annealing condition were investigated for BaAl_2S_4:Eu thin films. The films showed blue photoluminescence with a peak around 470 nm. Furthermore thin film electroluminescent devices showed pure blue emission. The CIE color coordinate is(x=0.12 y=0.11). Maximum luminance was 200 cd/m^2 under 1kHz sinusoidal wave voltage.View full abstractDownload PDF (412K) -
Mitsuhiro Kawanishi, Noboru Miura, Hironaga Matsumoto, Ryotaro NakanoArticle type: Article
Session ID: IDY2001-17
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSElectrical Characteristics of BaAl_2S_4:Eu EL device and Ta_2O_5 thin film were studied. BaAl_2S_4:Eu EL device show high luminance. To obtain high luminance, BaAl_2S_4:Eu EL device need high transferred charge density compared with that of ZnS:Mn EL device. In our device, to use insulating layer having conductivity can be augmented the insufficient transferred charge in BaAl_2S_4:Eu phosphor layer. This is a cause of low efficiency. Therefore the possibility of improvement of luminous efficiency was studied from the viewpoint of reduction of transferred charge.View full abstractDownload PDF (560K) -
Toshifumi Ishimori, Noboru Miura, Hironaga Matsumoto, Ryotaro NakanoArticle type: Article
Session ID: IDY2001-18
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWhite emitting undoped organic electroluminescence(OEL)devices which have multiple emitted layer was obtained by using a super-thin-film layer. Undoped OEL device which used Rubren as a super-thin-film emitting layer showed yellow emission. Furthermore, from Alq_3/BCP/DCM-1/TPD structures, white emission was obtained. This white emission was using the complementary colors relationship between orange emission(DCM-1)and blue emission(TPD).View full abstractDownload PDF (433K) -
Reiji HATTORI, Kazunori MIYAKE, Jun OGASAWARAArticle type: Article
Session ID: IDY2001-19
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have presented a current-writing active-matrix driving circuit for organic LED display, which realizes an accurate half-tone image, and a big size and a full-color display. This circuit can automatically compensate a threshold voltage shift of thin-film-transistor(TFT)and organic LED. In addition this ciruit can be fabricated not only using a poly-Si TFT but also using an a-Si TFT indicating capability of large-size display more than 4-inch diagonal.View full abstractDownload PDF (550K) -
H. Wada, H. Kominami, M. Kottaisamy, Y. Nakanishi, Y. HatanakaArticle type: Article
Session ID: IDY2001-20
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRate-earths(thulium, terbium, europium)doped yttrium oxide thin film phosphors are prepared by electron beam evaporation method on amorphous quarts, ITO and ZnO film on quartz substrates. The crystallinity of the films depended on the kind of substrate and substrate temperatures. It was found that the crystallinity and CL luminance of Y_2O_3:Tm film deposited on ZnO film with strong[0001]orientation showed much better than that of the Y_2O_3:Tm film on ITO glass substrate. Y_2O_3:Tb and Y_2O_3:Eu films were tried as blue, green and red emitting thin film phosphors, respectively. These thin film phosphors showed the color coordinates of Tm(0.13, 0.07), Tb(0.58, 0.35)and Eu(0.32, 0.57). Moreover, those phosphor films showed 2.19(Tm), 187.0(Tb)and 89.4cd/m^2(Eu)at 3kV, 60μA/cm^2. It is expected from these results that the RGB emitting Y_2O_3 thin films activated with rare earths have potentiality for field emission displays with high luminescence and good chromaticity.View full abstractDownload PDF (539K) -
M. Kottaisamy, H. Nakajima, H. Kominami, Y. Nakanishi, Y. HatanakaArticle type: Article
Session ID: IDY2001-21
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe cathodoluminescent properties of Zn doped Y_2O_3 has been studied for its application towards the improvement of luminescent properties of rare-earth doped Y_2O_3 at low voltage excitations(<2kVs). It was found that addition of Zn(5mol%)in the Y_2O_3 lattice increase the conductivity, crystallinity and shows a strong narrow band emission peaked at 390 nm with a weak shoulder emission at 360 nm without any broad band ZnO characteristic green emission. This near UV peak is found to increase as a function of current density and excitation voltages. However, the UV emission is quenched by addition of rare-earths viz, Eu, Er and Tm and shows an improvement of 30-40% in CL intensity at red, green and blue region, respectively, compared with Zn undoped phosphor. The results are discussed on the effect of Zn and its role on the improvement of luminescent properties at low voltage excitations.View full abstractDownload PDF (506K) -
Article type: Appendix
Pages App1-
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (85K) -
Article type: Cover
Pages Cover2-
Published: January 29, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (67K)
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