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Displaying 1-14 of 14 articles from this issue
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Article type: Cover
Pages Cover1-
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (14K) -
Article type: Index
Pages Toc1-
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (65K) -
Toshimitsu Koura, Toshihiro Yamamoto, Yoshimichi Takano, Keiji Ishii, ...Article type: Article
Pages 1-6
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA serious probrem on PDP picture quality is false contour noise observed in the moving pictures. In order to improve this problem, we have been developed a new signal processing and driving techniques. As the result, the moving picture quality of the 42-inch PDP for HDTV has reached at a practical level. This paper describes a new signal processing and driving method for improving the moving picture quality.View full abstractDownload PDF (738K) -
Ikuo Hiyama, Osamu Itoh, Katsumi Kondo, Akira ArimotoArticle type: Article
Pages 7-11
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSReflective LCDs have advantages of low power consumption, light weight and thinness. However, they have poor image quality including darkness, low contrast ratio, poor color reconstruction and narrow viewing angle. A reflective STN-LCD (super twisted nematic-liquid crystal display) using a blazed reflector and with the light scattering material between the display and the reflector is proposed. Key features include almost a doubling in brightness and contrast ratio due to reflection of the image toward the normal direction of the display and misalignment of the image and surface reflection. To obtain white representation, we optimize the scattering properties and compensate the retardation when the light impinge at an oblique angle.View full abstractDownload PDF (547K) -
K. Hirayama, T. Shiga, K. Igarashi, S. Mikoshiba, S. ShinadaArticle type: Article
Pages 13-18
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecently high luminance backlightings for LCDs are required for car-navigation systems. We reported previously a flat discharge fluorescent lamp having high luminance and uniformity, and get a simple structure. Luminous efficiency however was only 12 [lm/W], not satisfactory. In this paper the efficiency is improved to 23.5 [lm/W] by widening widths of the voltage pulses, thus assuring sufficient accumulation of wall charges. The mechanism of effeiency improvement is also claritied.View full abstractDownload PDF (565K) -
K. Yoshida, S. Zhang, H. UchiikeArticle type: Article
Pages 19-23
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe secondary electron emission characteristics are measured and discussed concerning the properties of MgO and new materials which have transmissivity of ultraviolet rays of 147 nm. The fundamental properties were measured for the fabricated panels.View full abstractDownload PDF (462K) -
T. Shiga, M. Ishii, K. Igarashi, S. Mikoshiba, H. Asai, N. KikuchiArticle type: Article
Pages 25-30
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRequirements for PDPs are larger size, higher resolution, higher luminance and lower power consumption. To satisfy these requirements, luminous efficiency must be improved. A new drive method of AC PDPs is proposed which superposes high frequency voltage on the conventional low frequency rectangular sustain pulses. The method is effective in reducing the operating voltage and increasing the luminance, with an expected increase of luminous efficiency. The drive circuit however requires an improvement.View full abstractDownload PDF (640K) -
J. Hori, T. Miyoshi, H. UchiikeArticle type: Article
Pages 31-36
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe fabricated organic EL devices utilizing an emitting layer doped with dye. The emission mechanism was discussed in the device by examining the EL spectrum and V-I characteristics. From the density distribution of Alq3 excitons, we concluded the dominant emission mechanism is the energy transfer due to exciton diffusion.View full abstractDownload PDF (420K) -
R. Kodama, K. Takahashi, K.A. Tanaka, Y. Kato, K. MuraiArticle type: Article
Pages 37-42
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe developed a soft x-ray laser probe system to diagnose a laser produced plasma. A grid imaging refractometry (GIR) and Moire deflectometry were applied for the x-ray laser probe system. Experiments were carried out at the ILE Osaka Univ. GEKKO XII laser facility. The Neon-like Germanium x-ray laser at 19.6nm was used to probe laser produced plasmas created from 100μm thick CH targets. Moire images and grid images were obtained, showing plasma expansion from the target surface. A 2-dimensional electron density profile was evaluated from the grid image.View full abstractDownload PDF (508K) -
M. Heya, H. Shiraga, M. Nakasuji, T. Yamanaka, K. MimaArticle type: Article
Pages 43-48
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to meet spatial and temporal resolutions of 2 ps and 5 μm, respectively, we have proposed and designed an ultrafast two-dimensional (2D) x-ray imaging technique applying 2D image sampling with an x-ray streak camera. We have demonstrated proprieties of this diagnostics, 2D sampling image x-ray streak camera (2D-SIXS), experimentally using an x-ray pinhole camera as a single-imaging device. This diagnostics will be available for observing more faster and smaller objects (for example, the core plasmas of a hot spark in inertial confinement fusion and the plasmas generated by ultra-short pulse laser) by utilizing an x-ray microscope with a high magnification of 120 as the x-ray imaging device.View full abstractDownload PDF (797K) -
H. Tajima, K. Hariki, M. Nakai, H. Azechi, K. MimaArticle type: Article
Pages 49-54
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have been proposed a new design of an x-ray framing camera (XFC) for time-resolved two-dimensional observation of implosion dynamics of inertial confinement fusion targets, which is called on electromagnetic defrection type XFC. In this design, an air-gap microstripline with an x-ray photocathode a the upper electrode is utilized. Photoelectrons between the upper and lower electrodes of the stripline are defrected by the electromagnetic field by the applied high voltage short pulse and temporally controlled. Analyzing the phtoelectron trajectry in the air gap of the stripline. We have designed a prototype with the spatial resolusion of 1μm and temporal resolusion of 10 ps, which has been just assembled.View full abstractDownload PDF (612K) -
Yen-Wei CHEN, Kouichi ARAKAKI, Zensho NAKAOArticle type: Article
Pages 55-60
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSPenumbral imaging is a technique for imaging of neutrons or other penetrating radiations. The technique uses the facts that spatial information can be recovered from the shadow or penumbra that an unknown source casts through a simple large circular aperture. The limitation is that the straightforward image reconstruction will introduce some significant distortion for a large field of view because of non-isoplanaticity of the aperture point spread function. A genetic algorithm (GA) is proposed for reconstruction of penumbral images, and the technique allows distortion-free reconstruction over a large field of view. Furthermore, because in GA the complicated a priori constraints can be easily incorporated by the appropriate modification of the cost function, the algorithm is also tolerant of the noise.View full abstractDownload PDF (577K) -
Keisaku KISHIMOTO, Yen-Wei CHEN, Zensho NAKAOArticle type: Article
Pages 61-65
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSUsually a single-pinhole camera is used for X-ray imaging. The limitation of the single-pinhole camera is that it can not combine good collection efficiency with high resolution. In URA camera, the pinhole is replaced by multi-pinholes arrays arranged in m-sequences. So the URA camera can provide an image with a high resolution and high SN ratio, and image distant planar sources with no artifacts. Furthermore, since the URA camera can view the object with a large solid angle, it can also provide some tomographic resolution for a three-dimensional object. In this paper, we present a quantitative evaluation of the tomographic resolution and propose a new method to improve the tomographic resolution.View full abstractDownload PDF (456K) -
Article type: Appendix
Pages App1-
Published: June 09, 1997
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (72K)
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