ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
23.40
Showing 1-17 articles out of 17 articles from the selected issue
  • Type: Cover
    Pages Cover1-
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Type: Index
    Pages Toc1-
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Heiju Uchiike
    Type: Article
    Session ID: IPU99-23:IDY99-195
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The circumstances of research and development on MgO protecting material are described when PDPs were at their infancy. Also the physical and engineering reasons are described why performance of PDPs is dependent on physical properties of protecting and dielectric materials. The recent evaluation methods for the protecting materials and their points at issue are raised.
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  • M. Ishii, K. Igarashi, S. Mikoshiba, H. Asai, S. Sago
    Type: Article
    Session ID: IPU99-24:IDY99-196
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The data pulse voltage has been reduced to 20V for AC-PDPs. For the Address-while-Display scheme the data pulse voltage reduction can be achieved by applying the metastable atoms created by priming discharge to the address discharge. The cease period of 32〜100μs was found to be adequate for utilizing the metastable priming.
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  • S Uchida, Y Sakai, T Watanabe, Byoung-Hee Hong
    Type: Article
    Session ID: IPU99-25:IDY99-197
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The electron swarm parameters of Xe/He and Xe/Ne mixtures were analyzed using a Boltzmann equation method in which generation of secondary electrons produced through excited atoms and reactions among excited atoms were properly considered. The discharge onset voltage V_b was shown to be strongly influenced by gas mixture ratio. The emission rateof vacuum ultra violet lights(λ=130, 147 and 173nm)from the Xe resonance levels(Xe_<ex, r>)and Xe excimer(Xe_2^*)were calculated. A suitable discharge condition to design Plasma Display Panels was discussed.
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  • Masahiro TODA, Takeki SAKURAI
    Type: Article
    Session ID: IPU99-26:IDY99-198
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We describe a laser induced fluorescence spectroscopy with using an evanescent wave in order to research the interaction with metastable excited atoms in plasma and the surface of a plasma display panel(PDP). First the distribution of metastable excited atoms is calculated in the relation with the interaction on the surface and it is shown that the evanescent laser spectroscopy(ELS)is effective to measure the surface interaction in active discharge. Second the mean density of the metastable excited atoms in PDP is measured by a laser absorption technique and the evanescent mode fluorescence spectroscopy induced by a laser is applied to a discharge panel in a large scale as a preliminary experiment.
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  • H Hashimoto, Y Ikeda, T Shiga, K Igarashi, S Mikoshiba, S Takaku, S Ni ...
    Type: Article
    Session ID: IPU99-27:IDY99-199
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    A flat lamp is developed for an 18-in.-diagonal LCD backlighting, using 8 electric-field-coupled discharge tubes. Since we confine the application of the lamp to the LCD backlighting, EMI shield is relatively easy. EIectricfield-coupled discharge lamps are considered to relatively long life because they utilize external electrodes. Also the high-frequency field assures more efficient light emission compared to the low-frequency discharge. Since number or positions of the external electrodes can be decided at will, longer tubes can be ignited with lower voltages. Luminance and efficacy are 3500 cd/m^2, 34 lm/W when the lamp is driven at 5.24MHz and 790 V_<p-p>. In this backlighting, the tubes can be driven with a single inverter circuit.
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  • H. Seki, T. Uchida
    Type: Article
    Session ID: IPU99-28/IDY99-200
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Bright reflective color LCDs without a backlight are key devices for portable information systems. They are classified under three categories on scattering media, reflector behind the cell, liquid crystal layer and front scattering film. The reflector method can control the scattering characteristics precisely. The front scattering film method is easy to fabricate the panel. Design of the reflective color LCDs improves the quality of LCDs and expands the application field of LCDs.
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  • Ichiro Fukuda, Noriyuki Nakane, Makoto Hazama, Yukeo Kotani, Tatuo Uch ...
    Type: Article
    Session ID: IPU99-29:IDY99-201
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    The reflective color LCD without a backlight is an important key device for the progress and diffusion of high functional portable information terminal. This paper has numerically analyzed the electro-optical properties of a new normally white mode reflective TNLCD composed of the previously proposed normally black mode reflective TNLCD and one liquid-crystal polymer film with a twist angle of the same magnitude, but with an opposite-handed to the LC layer. It was found that several sets of solutions exist for obtaining an achromatic image with high luminance as well as a high contrast ratio, and also found that the combination of an LC with a small dispersion of Δn_<LC> and a retardation film with a large dispersion of Δ n_R is preferable for obtaining a high contrast ratio.
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  • Jun YONAI, Hideo FUJIKAKE, Tahito AIDA, Hiroshi KIKUCHI, Masahiro KAWA ...
    Type: Article
    Session ID: IPU99-30:IDY99-202
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We developed a liquid crystal filter containing dichroic dyes, which continuously control color temperature of the transmitted light in real time. The filter was designed and fabricated based on Planck radiation law and Lambert-Beer's law, as a result, it exhibited the conversion range of color temperature form 2530K to 4450K, which was equivalent to that of a conventional color glass filter, and response time of 80 ms. It is conrflirmed that the color valance of pickup image could be corrected using a camera with the filter. This filter is especially useful for television location shooting in which illumination light source changes from incandescent lamp to solar light and the color temperature of the illumination varies.
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  • Seiji Nishiyama, Hirofumi Kubota, Kenji Nakao, Masao Yamamoto, Shinya ...
    Type: Article
    Session ID: IPU99-31:IDY99-203
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Recently there is a larger demand for a rear-projection television that can display images in large scale and high resolution. And hard demands for images of good quality, especially for high brightness, are increasing. We have developed polymer dispersed liquid crystal(PDLC) panels with high light efficiency and high brightness. Conventional PDLC panels have a hysteresis of TV(Transmittance-Voltage)curve. To reduce the hysteresis of TV curve is important to put to practical uses in TFT-LCDs. We have developed a novel method for the hysteresis evalution by CV(Capacitance-Voltage)measuraments. We report a study on hysteresis properties by this novel method.
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  • Taiichiro KURITA
    Type: Article
    Session ID: IPU99-32:IDY99-204
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    Degradation of picture quality for moving images displayed on hold type displays and the improving method of the degradation are discussed. When moving images are displayed on hold type displays, such as TFT-LCD displays, which sustain light intensity in a field period of video signal, the image quality is degraded, or the images are perceived as blurred. The cause of the degradation is the sustained light. So picture quality improvement cannot be attained only by to fasten transient response time of LCDs. There are two approaches to improve the degradation. One is to shorten the hold time by a shutter etc. The another is double field-rate displaying with motion compensated field interpolation.
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  • NAOKI HONDA
    Type: Article
    Session ID: IPU99-33:IDY99-205
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper describes a newly developed system for simultaneously recording driving information and images of the driving environment. Driving information includes the vehicle position, speed and direction of travel. Images of the Surrounding driving environment are captured with a video camera fitted with a universal head. Driving information is recorded on video tape by using a portion of the scanning lines of the image frames and can be reproduced in synchronization with the driving environment images during playback. This system is expected to be utilized in various studies and analyses of the driving environment.
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  • Shoji KAWAHITO, Daisuke MIYAZAKI, Yoshiaki TADOKORO
    Type: Article
    Session ID: IPU99-34:IDY99-206
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    This paper describes a pixel-level analog-to-digital converter for super high-speed camera systems whose frame rate are over 10000frame/s. The pixel-level A/D converter should have sufficiently low fixed pattern noise. To achieve this, we proposed a total scheme of the pixel level integration-type A/D convertcr in which the deviations of sensor circuit offset, intregrator gain and offset, and comparator offset are all cancelled out. The basic operation of the A/D converter is confirmed by SPICE simulations. The power dissipation in each pixel is esitimated to be 5μW which corresponds to the total power dissipation of 328mW for 256 x 256 pixel sensor array.
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  • Fumihiko Andoh, Miho Nakayama, Hiroshi Shimamoto
    Type: Article
    Session ID: IPU99-35:IDY99-207
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    We fabricated an 8-bit full digital image sensor in which each pixel consists of a photodiode(PD), a 1-bit A/D converter, an 8 bit pulse counter and signal processing(knee control)circuit, The device operates by means of a standard TV system and 2-D real time images are obtained. The dynamic rarnge of 1-bit A/D converter was 110 dB when the operating voltage was 1.3 V and we confirmed that the knee control operates effectively.
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  • Keiji Umetani, Naoto Yagi, Yoshio Suzuki
    Type: Article
    Session ID: IPU99-36:IDY99-208
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
    X-ray absorption in an object is used to obtain image contrast for conventional medical X-ray imaging using a film/screen combination with 50-100 μm spatial resolution, an X-ray image intensifier/TV camera system with 100-200 μm resolution and an X-ray CT with 500 μm resolution, On the contrary, micro-angiography and micro-tomography with 10-50 μm resolution and new methods for producing X-ray contrast using refraction and interference processes can be carried out in a synchrotron radiation facility because the facility is providing X-ray beams of very high spectral brightness and coherency. In Japan, the cancer continues to rank first among the cause of death. It is important to find small cancer lesions at the early stage, We are planning to apply new medical imaging techniques to accurate diagnosis of the early stage cancer at SPring-8.
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  • Type: Appendix
    Pages App1-
    Published: June 24, 1999
    Released: June 23, 2017
    CONFERENCE PROCEEDINGS FREE ACCESS
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