• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.169-173
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• 2003

Universal Display Corporation (UDC), together with its University partners at Princeton University and the University of Southern California, are developing high-efficiency electrophosphorescent OLED devices, based on triplet emission. Recent results show both excellent device efficiencies and good lifetimes for the commercialization of low power consumption, full-color, passive and activematrix OLED displays. We also show that phosphorescent devices may be driven by low cost amorphous silicon backplanes, and discuss the benefits of using our proprietary top emission OLED device architecture.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1405-1408
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• 2008

Synchronization signal circuit system for low cross-talk stereoscopic display. We proposed the employment of the scanning beams of any adjacent scanning regions gradually scan from upper to down direction of the LED backlight panel.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.710-713
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• 2008

LED Scanning Backlight Stereoscopic Display with Shutter Glasses is provided to realize stereoscopic image viewing even in a liquid crystal display. The eye shutter signal is alternately switched from the left eye to the right eye with 120Hz of LCD Vertical synchronization (V-sync).

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.1009-1011
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• 2002

We developed a Retinal Projection Display for a low vision aid. This device can be applied to a low vision whose visual sense is weak. In the device, a digital image was formed with spatial light modulator(SLM) and projected onto a retina with the Maxwellian View. The image on this display can be seen clearly without our ocular accommodation and a low vision can see it without correction of a refraction error.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1047-1050
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• 2009

The two approaches to improve the stability of oxide TFTs are described. First approach is the optimization of device architecture including MIS structure and passivation layer using conventional InGaZnO semiconductor channel layer. Second approach is to develop the new kinds of oxide semiconductor materials, which is very robust and stable against the gate bias stress and thermal stress.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.601-603
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• 2008

The main purpose of this study is to design and develop the information display device for power conditioning system of photovoltaic power generation system. The function of this device is to display the information, communicate with PCS controller and store the special information. The developed device is tested to verify the performance and experimental results show the excellent performance. An actual running test is being carried out to verify the reliability of the device including PCS by applying it to 10kW level photovoltaic power generation system established in Ulsan College.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1336-1339
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• 2007

Since organic thin film transistor (OTFT) provides simple and low cost processes, its application to the OTFT display has been studied. We developed an RC oscillator using organic thin film transistor and inverters with bootstrapping transistors. Device parameters were optimized by the simulation and OTFT RC oscillators were fabricated. The oscillator frequency and its dependence on resistance and bias voltage were studied. The organic TFT is adequate for low cost and simple process integrated circuits. The frequency of oscillation was simulated and measured. It is acceptable for low-cost microelectronic device and flat panel displays.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.8
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• pp.783-789
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• 2007

In this paper, firstly, we propose a generating method of the 3-D obstacle map using ultrasonic sensors. Secondly, we try to find the necessary stimulation conditions of compact tactile display device for effective transfer of obstacle information. The final goal of this research is the development of a walking guide system for the blind to walk safely. The walking guide system consists of a guide vehicle for the obstacle detection and a tactile display device for the transfer of the obstacle information. The guide vehicle, located in front of the walking blind, detects the obstacle using ultrasonic sensors. The processed information makes an obstacle map and transmits safe path and emergency situation to the blind by the tactile display. The tactile display device, located in the handle which is connected with the guide vehicle by cane, offers the processed obstacle information such as position, size, moving, shape of obstacle and safe path, etc. The concept of a walking guide system with tactile display is introduced, and experiments of 3-D obstacle detection and tactile perception are carried out and analyzed.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.486-488
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• 2009

High efficiency deep blue and pure white phosphorescent organic light emitting diodes were developed using a new deep blue phosphorescent dopant, tris((3,5-difluoro-4-cyanophenyl)pyridine) iridium (FCNIr). A high quantum efficiency of 9.1 % with a color coordinate of (0.15, 0.16) at 1,000 cd/$m^2$ was obtained in the deep blue device and a high quantum efficiency of 15.2 % with a color coordinate (0.30, 0.32) was obtained in the pure white organic light-emitting diodes. The quantum efficiency of the pure white device is the best quantum efficiency value reported in the pure white device up to now.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1203-1207
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• 2008

For a large sized, ultra definition (UD) and high refresh rate for motion blur free AMLCD TVs, amorphous IGZO thin film transistor (TFT) are applied and investigated in terms of threshold voltage ($V_{th}$) shift influenced by active layer thickness uniformity, source drain etching technology, heat treatment and passivation condition. Optimizing above parameters, we fabricated the world's largest 15 inch XGA AMLCD successfully.