• Proceedings of the KSME Conference
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• 2005.11a
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• pp.4.2-4.2
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• 2005

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.22 no.7
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• pp.555-558
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• 2009

This paper presents a step-down converter IC for automotive applications. This device was designed for a 40 V/1 A high-power output for voltage reference of automotive IC. It provides 250kHz PWM (pulse width modulation) and PFM(pulse frequency modulation) according to load conditions. This device was simulated spectre of IC-design-tools and fabricated Dong-bu Hitec 0.35um BD350BA process.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.07a
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• pp.218-221
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• 2002

We have successfully developed the high performance flexible thin film diode device for flexible plastic film LCD. For flexible LCD, TFD device must be normally operated under any deformation state. Two type devices, Ti/Ta$_2$O$\sub$5//Ta and Al/Ta$_2$O$\sub$5//Al were fabricated and the symmetry and reliability of those were estimated under various measurement conditions including severely bending states.

• Proceedings of the KIEE Conference
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• 1998.07d
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• pp.1358-1360
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• 1998

In this paper, organic thin film LED(light emitting diode) having ITO glass/$Alq_3$/Al structure using an $Alq_3$ was fabricated by the vacuum evaporation and the absorbance, wave length, 1-V characteristics were investigated. Electroluminescence of green and wavelength of 510[nm] were observed in this device. We observed absorbance form 320[nm] to 430[nm] and knew unstability of $Alq_3$ material as light emitting device.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.156-156
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• 2010

We have developed highly efficient blue phosphorescent organic light-emitting devices (OLED) with simplified architectures using blue phosphorescent material. The basis device structure of the blue PHOLED was anode / emitting layer (EML) / electron transport layer (ETL) / cathode. The dopant was partially doped into the host layer for investigating recombination zone, current efficiency, and emission characteristics of the blue PHOLEDs.

• Proceedings of the KIEE Conference
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• 2004.07e
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• pp.30-32
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• 2004

In this paper, as the preceding research for development of Intelligent Electronic Device(IED) for digital based substation automation system(SAS), we tried to selection of the most suitable digital filter by comparison of frequency response characteristic. performance of wanted frequency component extraction.

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.691-694
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• 1988

This paper proposes the model of Image Display on the Xenix System V and describes the method of writing device driver which can drive the graphics hardware and image scanner. The interface between user program and device driver in Kernel is also presented.

• Proceedings of the KIEE Conference
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• 2000.11c
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• pp.428-430
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• 2000

In this paper, the Flexible information display was implemented using AC powder electroluminescent device. ZnS:Cu and $BaTiO_3$ was used as a phosphor and dielectric respectively. The preparation of phosphor and dielectric layer was performed with screen printing. The implemented system of the Flexible information display was divided as following; EL display, driving circuit, software for driving. The properties of fabricated devices was measured with EL spectrum and brightness.

• Proceedings of the KIEE Conference
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• 1997.07d
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• pp.1349-1351
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• 1997

TFT2DS was utilized to provide the usefulness as an analytic and design tool. In this paper, the general effects of channel length of an inverted staggered amorphous silicon thin film transistor on its characteristics were investigated. The results obtained from these experiments would be adopted to the optimized device designs and advanced simulations of their electrical properties.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1998.06a
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• pp.439-442
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• 1998

In this paper, organic thin film LED(light emitting diode) having ITO glass/Alq$_3$/Al structure using an Alq$_3$ was fabricated by the vacuum evaporation and the absorbance, wave length, I-V characteristics were investigated, Electroluminescence of green and wavelength of 510[nm] were observed in this device. We observed absorbance form 320[nm] to 430[nm] and knew unstability of Alq$_3$ material as light emitting device.