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Displaying 1-29 of 29 articles from this issue
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Article type: Cover
Pages Cover1-
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (12K) -
Article type: Index
Pages Toc1-
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (113K) -
S. Miyazaki, E. Tagami, T. HichijyoArticle type: Article
Session ID: IDY2000-25
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn the personal computer market, flat display moniters and short length display moniters have been acting main part, and demands for display moniters having both flat and short length features have been increasing. However, this flat wide deflection CRTs will have the problems of both raster distortion and misconvergence increase. Therefore, in order to develop the flat wide deflection CRTs, it is indispensable to solve these problems with deflection yokes. Now, we have shown the procedures of the design to optimize both raster distortion free and good convergence, and have eventually developed the basic system of deflection yokes for 46cm100 Degree Deflection Pure Flat Color Display.View full abstractDownload PDF (593K) -
Tomoki Nakamura, Kazunari Noguchi, Go Uchida, Syoji ShiraiArticle type: Article
Session ID: IDY2000-26
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSShallow type, 46cm 100° CDT with high resolution up to 2M pixels is developed. The neck size is reduced to 24.3mm to avoid increase of the deflection power caused by enlarged deflection angle. To keep the beam spot diameter identical to that of large neck CDT, NEXT (Narrow elliptical aperture technology with EXTended lens) electron gun, having auxiliary electrode at main lens with intermediate voltage applied through built in resistor, is developed. Effective lens diameter is 8.1 mm, almost identical to that of the large neck tubes.View full abstractDownload PDF (458K) -
Yasutada Sakamoto, Hiroaki TanakaArticle type: Article
Session ID: IDY2000-27
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA new flat Cathode Ray Tube (CRT) with photo cathode display is proposed. The characteristic of this new CRT is that the electrons emitted from the photo cathode are controlled by the electric field. The photo cathode emits the photoelectron by irradiation from backlight. The anode voltage is 1/4 in comparison with a conventional CRT. The drive voltage is low. The consumption power is low. It has high brightness. This paper presents the basic structure, principle of operation, modulation principle, focus principle, display method, and a future policy of photo cathode and conclusion.View full abstractDownload PDF (1203K) -
H. Kominami, Y. Nakanishi, Y. HatanakaArticle type: Article
Session ID: IDY2000-28
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe penetration depth of low energy electron into ZnS was investigated using the structure combined with CaS:Ce emitting layer and ZnS buffer layer. The luminance properties were different from with and without ZnS buffer layer. The luminance depended on the thickness of ZnS and incident electron energy to the film surface. The results obtained in this experiment were larger than the Feldman's equation. It was caused by difference between anode voltage and incident electron energy.View full abstractDownload PDF (554K) -
M. Kottaisamy, M. Mohan Rao, D. Jeyakumar, Y. Nakanishi, Y. HatanakaArticle type: Article
Session ID: IDY2000-29
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSHomogeneously europium doped yttrium oxide red phosphor (Y_2O_3:Eu) has been synthesized from yttrium (europium) hydroxy carbonate precursor (YOHCO_3:Eu) obtained from urea hydrolysis by homogeneous precipitation techniques. The formation of Y_2O_3:Eu was studied by sintering of the precursors by solid and liquid phase sintering methods. It was observed that the liquid phase sintered phosphors yield improved crystallite size, particle morphology and photoluminescence efficiency compared with the solid phase sintered phosphors. The results obtained are discussed with respect to the effect of sintering on the phosphor properties.View full abstractDownload PDF (656K) -
M. Komatsu, M. Shiiki, S. ImamuraArticle type: Article
Session ID: IDY2000-30
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSprojection TVs have been manufactured as home used displays with large screen. The development to achieve the thinner phosphor screen and the higher density of electron beam will realize the high resolution in projection tubes (PRTs). However, the life time and the luminous efficiency of many phosphors decrease as these techniques make the excitation density increase. Especially, blue ZuS:Ag, Al phosphor in PRTs has a problem of the luminous saturation. Blue ZnS:Ag, Al phosphor for PRTs was prepared by gas flow synthesis and its traps were estimated by a thermoluminescence (TL) curves and its luminance were measured under a cathode-ray excitation. In TL curves, TL peak was observed at around 430K. In the synthesis with increasing the H2S flow rate, the deep trap decreased drastically. And its luminance went up to 5% higher than that prepared by a flux synthesis. It is clear that the deep trap density associated with sulfur vacancies is closely related to the luminous saturation and it will be a candidate for an Auger trap center.View full abstractDownload PDF (574K) -
Shin Imamura, Masatoshi Shiiki, Masaaki Komatsu, Naomitsu Watanabe, Yo ...Article type: Article
Session ID: IDY2000-31
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSPhosphors with high luminance and enough durability under the strong electron beam are necessary for phosphor screens in projection tubes. In addition, color reproducibility is also required for the good picture quality. We tried the improvement on the luminescence property by forming phosphor screens with two-layer stacked structure by different phosphors. In this report, the two layers fluorescent screens were produced with two kinds of phosphor, one is excellent in performance with strong electron beam and another is excellent in luminescent color. In these screens, the former phosphor layers were placed to be exposed to the electron beam directly. We examined the luminescence property of the phosphor screens in various layer thickness.View full abstractDownload PDF (699K) -
K. Hashimoto, Y. Baba, T. Shiga, S. Mikoshiba, S. Takaku, S. NishiyamaArticle type: Article
Session ID: IDY2000-32
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSHigh-frequency electric-field-coupled discharge lamps for LCD backlightings are expected to have high efficacy and long life. Since the lamps use external electrodes, the tube lengths can be extended arbitrary to cope with large LCD areas. In this paper the drive frequency was raised from 5 MHz of the previous report to 13.56 MHz, which resulted in reduced drive voltage, lower electrode temperature, and weaker Ne visible emission. These evidences show that efficacy was indeed improved. Average luminance of a 390 mm-long lamp with a diffuser plate was 2750 cd/m^2. Luminance uniformity of 74.8 % was attained by providing six sets of external electrodes.View full abstractDownload PDF (599K) -
Hirofumi Yamashita, Haruo Yamazaki, Toshihiro Terada, Nobuto Tsujikawa ...Article type: Article
Session ID: IDY2000-33
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIt has been recently recognized that some emitter materials applied for cold-cathode fluorescent lamps make the cathode fall voltage lower, thereby leading to a significant reduction of lamp power consumption. Through investigation on such effect of various kinds of emitter materials, we have eventually chosen the alkaline earth metal oxides containing BaO as an appropriate emitter. This presents its stable emitter effect during longer lamp burning hours of 10, 000hrs even at higher lamp current Ila 6mA, as compared with around 3, 000hrs of conventional emitter materials at Ila 4mA.View full abstractDownload PDF (526K) -
Nobuto Tsujikawa, Tetsuo Furuya, Kenji Yamada, Hisasi Dejima, Shinji K ...Article type: Article
Session ID: IDY2000-34
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAs a light source of backlight unit for liquid crystal monitor, Cold cathode fluorescent lamp is used. Currently, a sidelight type sized approx. 15 inches, is mainly adopted e.g., for lap top computer. However, in the fufure, it is expected that large sized high luminance liquid crystal monitors will be demanded, instead of CRT, in correspondence with further enlargement of liquid crystal monitor size. This time, we would like to report development of Cold cathode fluorescent lamp for large sized liquid crystal monitors targeting for high luminance by lengthening of life supposing usage in the high electric current area and improvement of lighting efficiency, and in addition, extending lamp length.View full abstractDownload PDF (305K) -
M. Tsuchiya, S. Shinada, Y. Arai, T. Shiga, S. MikoshibaArticle type: Article
Session ID: IDY2000-35
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe developed a simple-structured mercury-free flat fluorescent lamp for LCD backlightings. A flat fluorescent lamps has a couple of electrodes covered with dielectric layer and contains Xe. It is said that a Xe discharge lamp is low-efficiency, low-luminance and unstable. So we optimize its structure, gas composition and etc.obtained 1, 200cd/m^2 used 2.5inch lamp. We found possibility of marcury-free backlighting system.View full abstractDownload PDF (466K) -
Kiyoshi Matsunga, Yuji WagatsumaArticle type: Article
Session ID: IDY2000-36
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA back light unit with a system for the lumiosity comensation at low temperature was developed, maintaining the thinness which is a feature of the sidelight system.View full abstractDownload PDF (294K) -
T. Miyamoto, T. Takashiro, A. Sugimura, C.J. Dunn, B.A. Timimi, G.R. L ...Article type: Article
Session ID: IDY2000-37
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDeuterium nuclear magnetic resonance (NMR) spectroscopy has been used to investigate the field-induced director dynamics in a nematic liquid crystal, 4-pentyl-d2-4'-cyanobiphenly (5CB-d2) deuteriated in the a-position of the pentyl chain, confined between two glass plates. The NMR spectra have been measured as a function of time after turning an electric field on and off. It is demonstrated that the field-induced director dynamics in the nematic liquid crystal cells can be successfully time-resolved. In addition, it is found that the doublet NMR spectra are changed into powder-like spectra during the turn-on and turn-off processes. It is shown that values for the rotational viscosity and the diamagnetic anisotropy of 5CB-d2 can be determined from the time-resolved NMR spectra by assuming uniform alignment of the director.View full abstractDownload PDF (468K) -
Atsushi Sawada, Hiromoto Sato, Shohei Naemura, Atsutaka ManabeArticle type: Article
Session ID: IDY2000-38
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe internal electric field of LC cell was simulated in the steady state under the step voltage application by considering Poisson equation. The unevenness of the local field strength was drastically reduced in the analysis by taking the contribution of the space charge polarization into account compared with that without the contribution. The distribution of the local field strength was concerned for the analysis of the space charge polarization, which controls the complex permittivity in the low frequency region, because the distribution of mobile ions should become large with decreasing frequency. Nevertheless, according to the results under the DC field application, the distribution of the local field is found to be so small even in very low frequency region that the local filed can be considered to be approximately equal to the external field.View full abstractDownload PDF (584K) -
T. Taguchi, E. Nagata, T. SugiuraArticle type: Article
Session ID: IDY2000-39
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSColor LCDs are expected to expand their application territory to TV and Monitor. I order to obtain compatible characteristics to CRT, especially from the viewpoint of color reproduction, we tried to match the three primary colors of Color Filters to EBU Color Standards, which is a standard for CRT. We investigated the combinations and preparation methods of colorants and the emission spectra of the backlights. We found that only the specific combinations of Color filters and backlighs could give suitable characteristics, for example, the film thickness and the brightness.View full abstractDownload PDF (385K) -
Makoto Ishiyama, Tomohiro Tanaka, Matsuo Satoh, Hidehiro SekiArticle type: Article
Session ID: IDY2000-40
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSMicro-groove substrate (MG) using a ruling engine was evaluated geometrically and optically. As the result, it was confirmed that the MG substrate had periodic structure. Uniform molecular alignment is observed partially. Precise control of the ruling engine promises uniform molecular alignment of LCDs.View full abstractDownload PDF (910K) -
N. Nakane, M. Hazama, Y. Sakamoto, I. Fukuda, T. UchidaArticle type: Article
Session ID: IDY2000-41
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSReflective color LCDs without back lighting are important devices for the progress and popularization of portable information terminals. In this paper, we numerically analyzed the electro-optical properties of a normally white mode achromatic reflective LCD using a single-polarizer TN-LCD with a quarter-wave plate. We found that the 72° cell is the optimum rather than the 90° cell previously proposed as MTN mode because of its high luminous reflectance of about 50% and a practical contrast ratio of 30:1.View full abstractDownload PDF (563K) -
M. Hazama, Y. Koshida, N. Nakane, Y. Kotani, I. FukudaArticle type: Article
Session ID: IDY2000-42
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSReflective color LCDs with high-resolution picture are key devices for highly functional portable information terminals. In this paper, we numerically analyzed the electro-optical properties of new achromatic reflective LCDs using a single-polarizer DSTN-LCD and FDSTN-LCD with a quarter-wave plate. We found that the display modes exhibit a high contrast ratio of infinity in theory and a high luminous reflectance of 48%, independent of the duty ratio.View full abstractDownload PDF (605K) -
Masashi Ishimaru, Hiroyuki Okada, Hiroyoshi OnnagawaArticle type: Article
Session ID: IDY2000-43
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have investigated two kinds of liquid crystal display modes; microdeflection liquid crystal display (MDLCD) mode with zigzag shaped electrodes on opposite substrates and MDLCD mode with eight-division electrodes. In OFF state, liquid crystal molecules are aligned parallel to rubbed direction. In ON state, liquid crystal molecules are aligned to the 45° obliquely from the cell surface and rubbing direction. Deflection, diffraction and birefringence effect were used in these modes. Transmittance versus voltage characteristics, contrast ratios, switching time and viewing angle characteristics are discussed.View full abstractDownload PDF (405K) -
Hisanori Ohura, Hiroyuki Okada, Hiroyoshi OnnagawaArticle type: Article
Session ID: IDY2000-44
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have investigated a scattering display modes with in-plane electrodes structure. The in-plane electrodes were patterned on one-side of glass substrate and other side of glass substrate was roughened. We did not treated for molecular aligment on the surface of both substrates. This roughened surface disturbs uniform molecular orientational distribution and eventually induces the right scattering in off state. In on-state, the liquid crystal molecules are uniformly aligned due to applied electric field. Here, Polarizer is not necessary for this display mode. Under He-Ne laser irradiation, contrast ratio obtained was 17:1. Response times of τ_<on> and τ_<off> were 1.8ms, 9.2ms respectively. These response times were shorter than that of conventional IPS mode. We forecasted that response time might be improved by employing a non-uniform alignment of liquid crystal layer induced by roughened surface. As forecast, response time of hybrid-aligned cell with in-plane electrodes structure was shorter than that of conventional IPS mode.View full abstractDownload PDF (476K) -
Jun YONAI, Hideo FUJIKAKE, Yuzuru TSUCHIYA, Hiroshi KIKUCHI, Yoshiki I ...Article type: Article
Session ID: IDY2000-45
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe measured the viewing angle characteristics of polymer-stabilized ferroelectric liquid crystal (PSFLC) devices which contain rigid polymer network in the liquid crystal. The devices exhibit spatial gray scale capability by the areal distribution of binary liquid crystal domains, which are separated by the fine polymer network. High contrast is obtained over wide viewing angles of more than 100° without any contrast inversion. Also we simulate the viewing angle characteristics for the in-plain switching mode, where liquid crystal molecules move in the plain parallel to the substrate. It turned out that the simulation shows the similar tendency to PSFLC devices. Wide viewing angle and high-speed gray scale capabilities should make PSFLC a promising electrooptic material for future moving picture displays.View full abstractDownload PDF (589K) -
Yutaka ONOZUKA, Masahiko AKIYAMA, Tsuyoshi HIOKI, Tomomasa UEDA, Koji ...Article type: Article
Session ID: IDY2000-46
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have experimentally discussed operations of our proposed image-memory LCD by using an equivalent circuit model consisted of a ferroelectric device and a LC cell. We have demonstrated a gray-scale image, and have succeeded in holding the image for a long period. Also, we have theoretically studied the effect of bias on driving the image-memory LCD. We have found that the bias applied to the driving source makes the driving voltage lower, and especially when the output voltage to the LC layer is higher, this effect becomes more significant.View full abstractDownload PDF (478K) -
Taiju TAKAHASHI, Hirokazu FURUE, Shunsuke KOBAYASHIArticle type: Article
Session ID: IDY2000-47
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSPolymer-stabilized FLCDs(PS-FLCDs) are fablicated in terms of the transitionh from the bistable EO response to the monostable state by UV photo-curable treatment including photo-curable sidechain mesogenic polymer into a bistable FLCD cell. Our PS-FLCDs exhibit high performance, such as high contrast ratio, fast responce speed, thresholdless monostability, and grascale capability. The physical model of the transition which is from bistabitity to monostability for PS-FLCD cells is proposed, and some computer simulations are carried out. We tried to obtain a full-color display image using field sequential driving technique with the PS-FLCD cell.View full abstractDownload PDF (666K) -
Takeshi Terazawa, Nobuyuki Matsumoto, Fumio MatsukawaArticle type: Article
Session ID: IDY2000-48
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSTFT-LCD has an advantage owing to few decrease in brightness when interlace drive method is applied. TFT-LCD consists of capacitive device, therefore, its optical response is hold-type, while the response of CRT is impulsive. The slow optical response of liquid crystal and the hold-type response degrade moving-image quality. We have estimated the degradation of interlaced moving-images by using the parameter of optical transition width and frequency response. In conclusion, the transition width by interlace drive is relatively small compared with other intrinsic factors, while the frequency response is relatively worse.View full abstractDownload PDF (618K) -
Tsunenori Yamamoto, Yoshinori Aono, Makoto TsumuraArticle type: Article
Session ID: IDY2000-49
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to evaluate the deterioration of motion picture quality in displays with hold type characteristics quantitatively, we have developed a newly time-based-image integration measurement system. In this system, motion pictures on LCDs are taken by a CCD camera as time-based-images, and perceived images are reproduced by integration the time-based-images which are synchronized with motion picture velocity. This enables us to measure the brightness profile of perceived image.View full abstractDownload PDF (580K) -
Yutaka Nakai, Toshiya OhtakeArticle type: Article
Session ID: IDY2000-50
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSScattering characteristics of reflective LCDs have important effects on their comfortable viewing. By subjective evaluations based on paired comparison, we quantified the comfortable viewing of reflectors, and correlated it with their scattering characteristics. It was found that the comfortable viewing is related to the reflectivity within a certain range of scattering angle. It was also found that the range changes according to illumination conditions. Furthermore, subjective evaluation results were analyzed by factor analysis. A tendency of latent factors which govern the comfortable viewing was clarified.View full abstractDownload PDF (585K) -
Article type: Appendix
Pages App1-
Published: January 28, 2000
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (75K)
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