Kyung Cheol Choi

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— The newly designed plasma display with the cylindrical hollow cathode has been proposed and investigated to study the relationship between the photoluminous efficiency and the discharge characteristics. The photoluminous efficiency and the discharge characteristics are dependent on the geometry factors of cylindrical hollow cathode and gas pressure in the(More)
We elucidate that the luminescence from Eu3+-doped phosphor excited by the electron collision can be modified on location near the metallic nanoparticles. The Eu3+-doped phosphor was fabricated on the nanoscaled Ag particles ranging of 5 nm to 30 nm diameter. As a result of the cathodoluminescence measurements, the phosphor films on the Ag particles showed(More)
—The temperature-dependent characteristics of ac plasma display panels (PDPs) are investigated, based on various case studies using a conventional driving scheme with reset pulses. Though the main factor of the thermal effects is caused by strong sustain discharges, it is not only caused by the panel characteristics , but also by the temperature-dependent(More)
The effect of applying auxiliary pulses to the address electrode during the sustain period on the discharge characteristics of an AC plasma display panel was investigated. When auxiliary pulses of IOOV and 250wIz were applied to the address electrode during the sustain period, the maximum sustain. voltage was found to decrease by 14% while the minimum(More)
In this paper, a high performance flexible component that serves as a color filter and an electrode simultaneously is suggested. The suggested highly conductive and flexible color filter electrode (CFE) has a multilayer film structure composed of silver (Ag) and tungsten trioxide (WO3). The CFE maintained its color filtering capability even when the films(More)
A new self-assembly concept is introduced to form large and pristine films (15 cm in diameter) of reduced graphene oxide (RGO). The resulting film has different degrees of polarity on its two different sides due to the characteristic nature of the self-assembly process. The RGO film can be easily transferred from a glass substrate onto water and a polymer(More)
We present an organic light emitting diode with a perforated WO3 hole injection layer to improve the light extraction efficiency. The two-dimensionally perforated WO3 layer was fabricated by use of colloidal lithography. The light extraction efficiency was improved due to Bragg scattering of waveguide modes and surface plasmon polaritons, and the operating(More)
—Using simple pulse technique, two kinds of cases in alternating current (ac) plasma display panel were investigated. One is the relationship between the wall charge decay and the discharge aging time. The other is the relationship between space charge decay and the application of pulse to the address electrode during sustain period. For the former case,(More)
—In this study, the basic characteristics of an address discharge have been investigated on the dependence of an address pulse voltage and its characteristics were analyzed by the wall voltage measurement method. During the address operation, the discharge between an address electrode and a scan electrode is first generated by an address pulse voltage and(More)
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