• Journal of Digital Contents Society
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• v.18 no.3
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• pp.577-584
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• 2017

Despite growing participation of many researchers, the cases of applying the transformative emotional display technology using physical materials and media are still in its early stages and the concept and structure are not properly established in Korea. The emerging global trend of physical display shows a possibility of new digital signage using emotional flip display. In this context, this study attempts to develop related element technology necessary in physical flip display and electromagnetic rotation module along with the integration platform of aesthetic arbitrarily-shaped display. The found results will be applied in researching the contents for the main subject which will be exhibited at the EXPO 2017 in Astana. It is to build up the foundation pioneering the localization of associated industry by means of diverse technological breakthroughs including flip-display technology, electromagnetic module technology, real-time video inter-working technology, high-speed rotation module technology, and transformative 3D frame technology.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.427-430
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• 2007

Phosphorescent OLED technology is a core technology driver for OLED display and lighting products due to the inherent and demonstrated efficiency advantages. Here we present recent results in our continued advancements of PHOLED power efficiency and operational stability with focus on narrowing emission line-width, reducing voltage, and overall design for maximizing device lifetime.

• Journal of the Semiconductor & Display Technology
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• v.18 no.2
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• pp.103-110
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• 2019

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.555-557
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• 2004

We report the effect of the particle size (D50) and PSD (Particle Size Distribution) of glass frit on the transparency of transparent dielectric layer of PDP. The milling efficiency of wet milling with water was the best among the dry milling, wet milling with IPA and wet milling with water. The transparency increased with the reduction of particle size of glass frit as the milling time increased. Also the transparency changed by the PSD of glass frit. Glass frits of broad PSD showed high transparency compared with the glass frits of sharp PSD.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07a
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• pp.562-566
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• 2005

Toshiba Matsushita Display Technology (TMD) has firstly succeeded in mass production of OCB (Optically Compensated Bend) mode liquid crystal display panels which have excellent moving picture quality almost the same as CRT. We have newly developed 32 -inch diagonal HD ($1366{\times}768\;pixels$) panels using OCB mode and low temperature p-Si TFT (LTPS) array substrates. High performance of brightness of $600cd/m^2$ and contrast ratio of 600 : 1 was obtained by using pseudo-impulse driving method to insert a black period between continuous two frames, and also by using blinking backlight method. Furthermore, moving picture response time (MPRT) 6.5ms has been obtained by optimization of black insert driving and backlight blinking, without the great sacrifices of contrast ratio and luminance.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1557-1559
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• 2009

By using optimum doping ratio (10 ~ 20 wt%) of glycerol, the power conversion efficiency (PCE) of organic photovoltaic devices based on poly (3-hexylthiophene) and phenyl-$C_{61}$-butyric acid methyl ester was dramatically increased from 3.23% to 5.03%. Finally, semitransparent organic photovoltaic devices including glycerol doped poly (3,4-ethylenedioxy-thiophene):poly (styrene sulfonate) and thin Ag (< 1 nm) buffer layer typically have shown PCE > 3% with transmittance > 30% in visible ranges.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.984-987
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• 2003

The electrophosphorescent emission properties were investigated in polymer light-emitting diodes (PLEDs) based on a poly(9-vinylcarbazole) (PVK) doped with a green phosphorescent dye of fac-tris(2-phenylpyridine) iridium (III) [$Ir(ppy)_3$]. A green light peaked at 516 nm was emitted from devices with a configuration of ITO/PEDOT:PSS/PVK:$Ir(ppy)_{3}$/BCP/$Alq_{3}$/LiF/Al. The optimal doping concentration of $Ir(ppy)_{3}$ in PVK was found at 2% by weight, under which maximum current efficiency of 24.3 cd/A and peak external quantum efficiency of 6.8% were achieved at the high luminance of 4240 $cd/m^{2}$. The external quantum efficiency of 5% and current efficiency of 18 cd/A can be sustained even at the very high luminance of 35000 $cd/m^{2}$.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.504-507
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• 2002

We investigated electro-optic and ionic properties of twisted nematic cells by using control of chiral pitch. These properties are observed in practical experiment and simulations. C-V and V-T curve characteristics were obtained from three types of cells with d/p. It is shown that d/p ratio of short cells exhibit faster response time improved by 20% than normal cell. Also, inter-gray response time is improved each rise time and decay time. And, the increase of saturation voltage is happened because of the small twist angel change from initial state at high voltage near 5V. To compensate for longer black level tail, gamma curve index was varied from g = 2.2 to g = 2.7 in module status. Additionally, adding chiral dopant into TN cells improved ionic characteristics such as increasing VHR, Ion density and DC Hysteresis were decreased..

• Journal of Information Display
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• v.3 no.4
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• pp.1-3
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• 2002

The antiferroelectric liquid crystal display (AFLCD) is a unique display that can at demonstrate a moving image perfectly the passive matrix driving scheme. We optimised driving the waveform and introduced a dual-driving method. Also, by improving this driving method and using line inversion method, we realize the AFLC display of high image quality with $160(RGB){\times}240$, 32768 colors, crosstalk free and flicker free contrast ratio is greater than 60:1, and the brightness is above 200 $cd/m^2$.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.175-178
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• 2008

A new laser-addressing method is proposed in this paper. With the characteristic of high power and small spot size, simple structure electronic paper can be addressed only by laser source, and high quality image with 300dpi resolution can be easily achieved.