ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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22.37
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • COLORIMETRIC DESIGN OF GUEST-HOST LIQUID CRYSTAL DISPLAY
    H. Seki, T. Uwano, T. Uchida
    Article type: Article
    Pages 1-6
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A bright reflective LCD without a backlight is a key device for portable information systems. The guest-host LCDs use absorption effect of dichroic dyes and have a wide viewing angle cone. So that, complicated designs of optical compensation in birefringence or optical rotatory power modes have no use of the GH-LCDs. Black and white color of the GH-LCDs works as a light shutter of a full color display with micro-color filters and the display must match achromatic color precisely. Then it is necessary to mix dyes for achromatic display in the GH-LCDs. In this work, the design was carried out with the Newton-Raphson method in order to obtain the optimum dye concentration. As a result, the relationship between the dye concentration and the half width of spectra of dyes was clarified. The process gives us a helpful guideline in fabrication of the reflective color LCD and it is expected that the precise color matching improves the quality of LCDs.
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  • Preferred Viewing Distance and Display Image Characteristics for Reflective Liuquid Crystal Displays
    Satoru Kubota
    Article type: Article
    Pages 7-11
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We investigated the effects of lightness, contrast and character size on preferred viewing distance for reflective LCDs. The 29 subjects with normal visual acuity assessed the preferred viewing distance for the 25 lightness and contrast combinations for five character sizes displayed on hard copies that simulated reflective LCDs. The results indicate that the preferred viewing distance is dependent on subjective legibility of the simulated reflective LCD. The relationships between the preferred viewing distance and the display image characteristics for reflective LCDs were discussed.
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  • Steady-state Current for Liquid Crystalline Material
    Toshiyuki Takagi, Yuji Nakazono, Atsushi Sawada, Shohei Naemura
    Article type: Article
    Pages 13-17
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Steady-state current measurements for a liquid crystalline material, 4-(trans-4-pentylcyclohexyl)benzonitryl(PCH-5), were performed. It was found that conductivity decreases with increasing applied DC voltage in a lower voltage region (<0.3V). In a higher voltage region (from 0.3 to 1V), conductivity increases with increasing voltage. Assuming an existence of electric double layers on the electrode surfaces, it is considered that the steady-state current in the range from 0.3 to 1V is caused by Schottky effect. The injection energy of an electron from electrodes to the LC material was calculated from observed temperature dependence of the steady-state current.
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  • Measurement of secondary electron emission coefficient (γ) of protection layer materials in PDPs by using ionization technique with laser
    Tomoko Suzuki, Akira Kaneko, Yoshio Watanabe, Nobuaki Furuya
    Article type: Article
    Pages 19-24
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_19
    CONFERENCE PROCEEDINGS FREE ACCESS
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    For improving the efficiency and the ignition voltage for AC-PDPs, it is important to use high γ value materials as the protection layer. We have developed the novel measurement technique of the secondary electron emission coefficient by using Xe gas breakdown with (CO_2 laser. With this technique, the γ values of the MgO films formed with various evaporation conditions were measured. Also, the quality of the films was estimated with SEM and XRD.
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  • Structure of Sputtered Zn-Ga-O Thin Films and Evaluation of Low Voltage Electron Beam Excitement Luminescence
    H. Isogai, Y. Yoshida, H. Hayashibe, H. Yamamoto
    Article type: Article
    Pages 25-30
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The purpose of this work is to obtain phosphor thin films of low voltage electron beam excitement of highly efficient light emission and long lives for Field Emission Display (FED). We constructed a new type of a vacuum system in which sputtering preparations of Zn-Ga-O films and in-sltu evaluations of low voltage electron beam excitement luminescence can be performed. An emission of greenish blue light was observed in the film which was deposited on about 500℃ substrates from a ZnGa2O4 target. The emission spectrum of the film was similar to that of a ZnO phosphor. The obtained films were amorphous and have characteristic modulations of the composition to the direction of the film thickness. In the film the surface layer was Zn-rich and under layers were Ga-rich.
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  • Blue SrS : Cu thin film electroluminescent devices grown by hot-wall deposition using successive source supply
    Toshihiko Fujiwara, Haruki Fukada, Kazuharu Yamabe, Koutoku Ohmi, Shos ...
    Article type: Article
    Pages 31-36
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_31
    CONFERENCE PROCEEDINGS FREE ACCESS
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    SrS : Cu, Cl thin film electroluminescent (TFEL) devices have been prepared by the hot-wall deposition using successive supply of source materials. SrS : Cu thin films have a grain size of about 1 μm and have no dead layer. The TFEL devices show blue EL emission with the chromaticity coordinate of (0.19,0.28). The luminance and efficiency at 1kHz drive are 100 cd/m^2 and 0.1lm/W, respectively. The presence of trailing edge emission impulse the EL excitation process that Cu^+ centers are ionized and then the capturing of electrons by ionized Cu^<2+> centers gives rise to the EL emission.
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  • Stereoscopic large display using full color LED panel with polarizing eyewear
    H. Yamamoto, S. Muguruma, T. Sato, Y. Hayasaki, Y. Nagai, Y. Shimizu, ...
    Article type: Article
    Pages 37-42
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_37
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Stereoscopic large display with polarizing eyewear implemented by using full color LED panel is described. The panel has 160×80×RGB LED's (the panel size is 1.28m×0.64m). The stereoscopic image consists of columns for the right eye and columns for the left eye which are arranged altemately. These columns are masked by polarizing film stripes so that the image for the right eye can be seen by the right eye and vice versa by using polarizing eyewear. Experiments about the viewing distance and the viewing angle showed that the proper viewing distance was 3000 times as large as the dot pitch and that the viewing angle was not restricted by the polarizing film mask.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: July 03, 1998
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.22.37.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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