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Cell panel electrical test for evaluating the electrical characteristics of liquid crystal displays
Yasuhiro Miyake,Atsuto Ota,Hidekazu Nishimura 한국정보디스플레이학회 2015 Journal of information display Vol.16 No.1
Electrical models of liquid crystal display (LCD) have been studied and used in design simulation. Using the right LCD models is indispensable to accomplish high-quality and highly reliable LCDs. This paper presents a cell panel electrical test (Cell-E Test) for evaluating the electrical characteristics of LCDs. The Cell-E Test was derived from in-process electrical testing for thin film transistor arrays, and utilizes charge measurement for measuring the capacitance value of a pixel. The capacitance-voltage (C-V) and capacitance-time (C-t) characteristics can be measured using a sweeping-applied voltage and based on the period of applying voltage in the Cell-E Test. In this study, actual C-V and C-t characteristics were measured by applying the Cell-E Test to a twisted-nematic active-matrix LCD (TN AM-LCD). The parameters of liquid crystal models were extracted from the data measured using the least-squares method, to show that design models can be verified with the actual parameters of cell panels through the Cell-E Test.
Chang, Hun,Hwang, In-Yong,Chung, Jae-Ho,Stewart, J. Ross,Higemoto, Wataru,Miyake, Yasuhiro American Physical Society 2018 Physical Review B Vol.97 No.1
<P>We report the temperature-dependent evolution of spin ordering and excitations of the frustrated tetragonal (c >a) spinel ZnMn2O4 across the two-dimensional antiferromagnetic transition. Muon spin relaxation indicates full development of ordered magnetic moments immediately below T-N = 62.7(2) K in spite of the apparent low-dimensional ordering. Using inelastic neutron scattering, we obtained the spin Hamiltonian accounting for the temperature-dependent spin excitations. The damped spin waves at high temperature exhibit a continuous increase in their lifetime on cooling across T-N. In contrast, the finite anisotropy gap appears suddenly below T-N indicating that single-ion anisotropy stabilizes the antiferromagnetic chains. We also observed the frustrated out-of-plane exchange contributing to the high-energy modes.</P>
High-frequency Induction Heating for Tiny Foreign Metals
Shinya Kurachi,Naoki Yamamoto,Hiroaki Yamada,Toshihiko Tanaka,Eiji Hiraki,Yukiharu Yamada,Tatsuya Nagao,Yasuhiro Miyake,Yujiro Noda 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
The anxiety of tiny metal contamination into resin materials in the manufacturing process has become one of the serious issues. Because it may often cause of overheat in lithium-ion batteries, flat panel displays, and so on. Therefore, a study on detecting method of the tiny metals is a significant issue. The authors have been investigating the high-frequency induction heating (IH) based approach for tiny metals detection. In this paper, effective magnetic circuit design and IH conditions are discussed and demonstrated from theoretical and experimental point of view.
Negative Muon Capture on Nitrogen Oxide Molecules
Kazuhiko Ninomiya,Takashi U. Ito,Wataru Higemoto,Makoto Kita,Atsushi Shinohara,Takashi Nagatomo,Kenya Kubo,Patrick Strasser,Naritoshi Kawamura,Koichiro Shimomura,Yasuhiro Miyake,Taichi Miura 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.41
The characteristic muonic X-ray measuring system for low pressure gas sample was constructed to investigate the initial process of muonic atom formation. Low background characteristic muonic X-ray spectra were obtained for neon (1.0 bar) and nitrogen mono-oxide samples (0.99 bar) by muon irradiation with 19 MeV/c. The deviation of characteristic muonic X-ray intensity patterns both for muonic nitrogen and oxygen atoms in nitrogen mono-oxide sample between our low pressure experiment and the previous high pressure experiment was found. Muon capture probability was also determined and compared with the previous work and empirical estimations.