bluuebunny/crossref_metadata_2025_split huggingface dataset:
72.2: Invited Paper: Color Processing for Wide Gamut and Multi‐Primary Displays
Authors: Chorin Moshe Ben 
Published: January 2009

AbstractUntil recently most displays were based on CRT. Since all CRTs have similar color characteristics, RGB data represent colors tuned according to the CRT properties, and thus no processing is required at the display end. The emergence of wide gamut displays changed this situation, since rendering of RGB data on wide gamut displays without suitable processing would result in unnatural colors. In the article we discuss color processing for wide gamut displays, and describe algorithms and methods for gamut mapping and multi‐primary conversion.
73.3: Psycho‐Visual Evaluation of CT Image Denoising Algorithms
Authors: Vansteenkiste Ewout , Philips Wilfried , Marchessoux Cédric 
Published: January 2009

AbstractIn this paper, we present a psycho‐visual experiment to test the influence of noise reduction filters on CT image quality. Both lung and abdomen images were tested. We found that for lung images filtering was pernicious for the overall perceived image quality. However, filtering the abdomen images resulted in increased perceived quality image.
10.3: Overdrive LUT Optimization for LCD by Box Motion Blur Measurement and Gamma‐Based Thresholding Method
Authors: Zhao Hung‐Xin , Chao Mu‐Lin , Ni Feng‐Chou 
Published: January 2009

AbstractThe Overdrive technology is frequently used for speeding up the response time and improving the motion blur of LCD panel in FPD industry. Most of them try to generate Overdrive Look‐Up Table (OD‐LUT) by calculation on Gray Level (G‐G or GTG) Response Curve (GLRC) or manually tuning by human eyes. The first method cannot find the results equivalent to the human visual perception, and the inefficiency and uncontrollable stability of the second way derive the other questions. Therefore, how to systematically generate reliable optimal OD‐LUT becomes an important issue. In this paper, we not only propose an automatic system to recursively search the optimal OD‐LUT according to the Moving Picture Response Time (MPRT) of LCD, but also we further discuss how the different MPRT indexes derived from Moving Edge Blur and Box Motion Blur affect the performance of OD‐LUT Optimization Process. Furthermore, some thresholding methods for the amount of overshoot and undershoot are compared here. The experiments show that the Gamma‐Based Threshold can effectively control the strength of side effect (or double edge) that human eye will sense almost the same intensity difference on each gray level.
P‐4: Mechanisms of Threshold Voltage Drift in Nanocrystalline Thin‐Film Transistors for Active‐Matrix Displays
Authors: Templier Francois , Oudwan Maher , Sermet Frederic , Demars Patrick 
Published: January 2009

AbstractThe mechanisms of threshold voltage (Vth) drift in nanocrystalline silicon (nc‐Si:H) TFTs have been investigated. Using bias‐temperature stress measurements, it is found that the dominant mechanism of Vth drift is charge trapping in the SiNx gate insulator. This result is confirmed by a study on ambipolar nc‐Si:H:TFTs. Comparing with a‐Si:H TFTs, this means that the reduction of the voltage shift in nc‐Si:H TFTs is the result of an improvement of the semiconductor material.
P‐13: Photosensitivity of Amorphous IGZO TFTs for Active‐Matrix Flat‐Panel Displays
Authors: Chuang Chiao‐Shun , Fung Tze‐Ching , Mullins Barry G. , Nomura Kenji , Kamiya Toshio , Shieh Han‐Ping David , Hosono Hideo , Kanicki Jerzy 
Published: January 2009

AbstractWe studied the optical and electrical properties of the amorphous indium gallium zinc oxide thin‐film transistors (a‐IGZO TFTs). To develop a‐IGZO density‐of‐states model, intrinsic a‐IGZO optical properties such as optical band gap and Urbach energy, and TFT characteristics under illumination are investigated. During the a‐IGZO TFTs illumination with the wavelengths ranging from 460 to 660 nm, the off‐state drain current only slightly increases while a large increase was observed for the wavelength below 400 nm. Threshold voltage and subthreshold swing are also only slightly modified between 460 to 660 nm, while field‐effect mobility is almost unchanged in the investigated photon energy range. The observed results are consistent with the a‐IGZO optical energy band gap of about 3.05 eV. This study suggest that the a‐IGZO TFTs are light sensitive above 3.0 eV and photogenerated electrons are more mobile than holes within device channel region.
P‐16: Distinguished Student Paper: Noble a‐Si:H Gate Driver with High Stability
Authors: Choi Jae Won , Kwon Min Sung , Koo Ja Hun , Park Jong Hyuk , Kim Se Hwan , Oh Dong Hae , Lee Seung‐Woo , Jang Jin 
Published: January 2009

AbstractWe developed a stable, hydrogenated amorphous silicon thin‐film transistor (a‐Si:H TFT) gate driver, composed of 10 TFTs and 1 capacitor. The pull‐down transistors are operated under AC bias to reduce the threshold voltage shift (Vth shift). In our previous simulation results indicate that its lifetime can be as long as 50,000 hrs by AC operation of pull‐down transistors. In this work we have studied the reliability of the gate driver manufactured. We confirmed that our gate driver is very stable, so that the expected lifetime is longer than 50000 hrs.
P‐17: Low Power Level Shifter for System‐on‐Panel Applications
Authors: Chung Hoon‐Ju , Sin Yong‐Won , Cho Bong‐Rae , Lee Seung‐Woo 
Published: January 2009

AbstractA new low power level shifter using low temperature polycrystalline silicon (poly‐Si) thin‐film transistors (TFTs) for system on panel (SOP) applications is proposed. The proposed level shifter uses a capacitive coupling effect and can reduce power consumption owing to no short circuit current. The proposed level shifter consumed only 28% of the power that is necessary for the conventional one.
P‐18: Highly Stable a‐Si TFT Gate Driver with Simple Logic Circuit
Authors: Jang Yong Ho , Yoon Soo Young , Park Kwon‐shik , Kim Hae Yeol , Kim Binn , Chun Mindoo , Cho Hyung Nyuck , Choi Seung Chan , Moon Taewoong , Ryoo Chang Il , Cho Nam Wook , Kim Sung Ki , Kim Chang‐Dong , Kang In Byeong 
Published: January 2009

AbstractA novel integrated gate driver with a simple logic circuit (SLC) using 5 a‐Si TFTs has been developed. The noise voltage owing to clock coupling is eliminated effectively with an overlapped clock controlled transistor. The SLC gate driver, successfully integrated in 14.1‐in. XGA TFT‐LCD's, shows marked stability despite the extremely simple structure.
P‐20: Post‐Annealing and Passivations of Transparent Bottom Gate IGZO Thin Film Transistors
Authors: Cho Doo‐Hee , Yang Shinhyuk , Shin Jaeheon , Ryu Min‐Ki , Cheong Woo‐Seok , Byun Chunwon , Yoon Sung‐Min , Park Sang‐Hee Ko , Lee Jeong Ik , Hwang Chi‐Sun , Chu Hye‐Yong 
Published: January 2009

AbstractWe have examined post‐annealing and passivation for the transparent bottom gate IGZO TFT having an inverse co‐planar structure. The oxygen‐vacuum two step annealing enhanced the field effect mobility up to 18 cm2/Vs and the sub‐threshold swing down to 0.2 V/dec. However, the hysterysis and the bias stability problems could not be solved just by post‐annealing. Thus, we have passivated the bottom gate IGZO TFTs with organic and inorganic materials. Ga2O3, Al2O3, SiO2 and some polymer materials were effective materials for passivations. The hysterysis and the stability of the TFTs were remarkably improved by the passivations.
P‐22: Electrical Stability of ZnO TFT during Gate‐Bias Stress
Authors: Kim Tae‐Hyun , Kim Sho‐Yeon , Jeon Jae‐Hong , Choe Hee‐Hwan , Lee Kang‐Woong , Seo Jong‐Hyun , Shin Jae‐Heon , Park Sang‐Hee Ko , Hwang Chi‐Sun 
Published: January 2009

AbstractWe fabricated TFTs with ZnO thin film as an active layer. Electrical bias stress test of ZnO TFT was also carried out. The results of stress test of ZnO TFT differed from those of a‐Si:H TFT. Therefore, the instability of ZnO TFT cannot be explained by conventional degradation mechanisms of a‐Si:H TFT. The variance of some factors in the fabrication process showed a certain trend in the results of bias stress. A possible mechanism of abnormal behavior under the gate bias stress was discussed.
11.1: Invited Paper: Review of Viewing Angle Compensation of TN‐Mode LCDs Using WV Film
Authors: Ito Tadashi , Yasuda Shoji , Oikawa Tokuju , Ito Yoji , Takahashi Yohei 
Published: January 2009

AbstractWe developed WV films for TN‐mode LCDs, which optimized optical parameters of the polymerized discotic material (PDM) layer and cellulose triacetate (CTA). We will review the development concept of WV film and realization of its concept before now and from now. Especially the discotic molecular alignment control enabled us to improve the contrast ratio at oblique viewing angles of TN‐mode LCDs. In addition, color shifts at oblique angles are important for large screen size TN‐mode LCD monitors and LCD TV sets. To improve this color shift problem, we have developed new technologies.
P‐29: Modeling of Amorphous Oxide Semiconductor Thin Film Transistors and Subgap Density of States
Authors: Hsieh Hsing‐Hung , Kamiya Toshio , Nomura Kenji , Hosono Hideo , Wu Chung‐Chih 
Published: January 2009

AbstractWe report a model of the carrier transport and the subgap density of states in a representative amorphous oxide semiconductor, amorphous InGaZnO4 (a‐IGZO), for device simulation of a‐IGZO TFTs. Compared to hydrogenated amorphous silicon, a‐IGZO exhibits much lower densities of tail states and deep gap states, leading to the small subthreshold swings and high mobilities.
P‐240L: Late‐News Poster: Advanced Design of a‐Si Gate Driver and Data Line Multiplexing for Low Cost and Low Power TFT‐LCDs
Authors: Kuo Che‐Cheng , Shih Chih‐Jen , Shih I‐Cheng , Hsu Chun‐Yuen , Ku Chien‐Ping , Tsai Cheng‐Hung 
Published: January 2009

AbstractThe techniques of data line multiplexing with integrated gate driver circuits based on the amorphous silicon TFT process are proposed and demonstrated. Our present scheme reduces the number of data lines and only needs half channels of source driver IC without huge multiplexer circuits in peripheral. The reliable gate drivers integrated in panel generate odd and even gate signals sequentially from both sides of display, while the life time of the integrated circuits can be estimated over 100,000 hours. for the polarity inversion, this panel could be operated under column inversion or two dots inversion modes. The feasibility of this method was demonstrated with the 5‐inch WQVGA AMLCD. Since only one data driver IC is needed, its cost of driver ICs and power consumption of data drivers are reduced.
11.2: Improved Contrast Ratio in IPS‐Pro LCD TV by Using Quantitative Analysis of Depolarized Light Leakage from Component Materials
Authors: Utsumi Yuka , Takeda Shintaro , Kagawa Hiroyuki , Kajita Daisuke , Hiyama Ikuo , Tomioka Yasushi , Asakura Toshiki , Shimura Masato , Ishii Masahiro , Miyazaki Kaori , Ono Kikuo 
Published: January 2009

AbstractThe degree of imperfection was defined as the independent intrinsic index of the degree of degraded contrast ratio for each component. The scattering index of liquid crystal layer gives an effective guideline for reducing light leakage intensity. By using this guideline, we have made an IPS‐Pro LCD with a uniform contrast ratio of 1500:1 within ±16.5° of polar angle.
P‐34: 3D and Stereoscopic Display Systems and Art Education Strategy in Developing Countries
Authors: Moussallam Nessreen Youssef Abo 
Published: January 2009

AbstractThe 3d‐Stereoscopic display systems gives a wide range of applications in many fields, but it has been untapped enough in the field of education, especially in developing countries. There are several challenges to using high tech Educational process in these centuries. This paper presumes that using 3D hyper‐realistic images for the interactive visual systems could help establishing new paradigm assisting as an effective tool in art educational process.
P‐261L: Late‐News Poster: Automatic Gamma and VCOM Calibration in TFT‐LCD Panel
Authors: Kim Hong J. , Wong Mike 
Published: January 2009

AbstractOptimizing gamma and VCOM setting in a LCD panel is a tedious and time consuming process that usually takes engineers days in the lab. This paper describes an automatic calibration system that is able to achieve the optimum VCOM and Gamma setting in less than one minute, enabling automatic gamma and VCOM optimization in the production line.
P‐39: Theoretical Limit of Object Colors and Real Object Colors
Authors: Fujine Toshiyuki , Kanda Takashi , Yoshida Yasuhiro , Sugino Michiyuki , Teragawa Masatsugu , Yamamoto Yoichi , Ohta Noboru 
Published: January 2009

AbstractWe clarified how wide the gamut of subjects intended to be reproduced on a display are, and what kind of characteristics the BT.709 display has. First we revealed the theoretical limit of real object colors (surface‐colors) with pseudo optimal color, and the gamut of real object colors referred SOCS. Then we revealed the characteristics of the BT.709 display gamut from comparison between BT.709 display gamut and TV color signal distribution which was measured. Then we estimated a probability distribution of real object colors, and suggested a display color design strategy with this knowledge.
P‐43: Effects of Changing Image Size on Depth Perception Using a Floating 3‐D Display
Authors: Shibata Takashi , Yamazoe Takashi , Kawai Takashi , Kuribayashi Hidenori , Hatada Toyohiko , Tomisawa Isao , Ishikawa Masaru 
Published: January 2009

AbstractA floating‐image display produces 3‐D effects using a lens system that makes an image appear to float in the air. The authors examine the effects on depth perception and asthenopia of viewing a floating image that continuously changes in size. The results of the experiments suggest that viewers perceive the floating image to be moving back and forth as the image size changes despite the fact that the image's actual position does not change. Monocular depth cues, especially changes in size, enhanced the 3‐D effects of images presented on the floating‐image display.
P‐45: A Study on the Relationships between Human Perception and the Physical Phenomenon of Speckle
Authors: Lee Yun Mi , Lee Dong Uk , Park Jong Myoung , Park So Yeon , Lee Seung Gyu 
Published: January 2009

AbstractOur study used the objective and subjective evaluation to show a practical quantitative measurement of speckle in relation to real usage. Speckle sensitivity was measured as a function of luminance, viewing distance and image content. We examined the relationships between human perception and the physical phenomenon of speckle.
P‐48: Adaptive Frame Rate Up‐Conversion Considering Low Computational Complexity and Complex Motion
Authors: Kang Suk‐Ju , Yoo Dong‐Gon , Lee Sung‐Kyu , Kim Young Hwan 
Published: January 2009

AbstractThis paper presents a new method for frame rate up‐conversion using sub‐sampled bilateral motion estimation, motion vector smoothing, simplified bidirectional motion compensated interpolation, and complex motion detection. The proposed method produces improved image quality and requires less computational complexity compared to conventional motion estimation. The average PSNRs of the proposed method for frame rate up‐conversion outperform those of the benchmark frame rate up‐conversion technique by up to 4.39 dB for the test sequences. Furthermore, the motion estimation of the proposed FRUC method reduces the required computational complexity to 12.5% of that required for full‐search block matching motion estimation.
P‐52: Evaluation of LCD Optical Performances with Motion Blur Reduction and Color Improvement Technologies
Authors: Chen Eddy G. , Li Kuo‐Feng , Chan Kai‐Chieh , Chen Sz‐Hsiao , Hsieh Tsau‐Hua , Yang Chiulien , Pang Jia‐Pang 
Published: January 2009

AbstractMotion blur and color improvement technologies are applied to three popular LC modes, twisted nematic, fringe field switching, and multi‐domain vertical aligned. FFS panel demonstrates the best overall performance. A new metric for avoiding flicker or comparing flicker performance between different panels is proposed.
P‐53: Spatio‐Temporal Level‐Adaptive Overdrive Method for LCD Driver ICs for Mobile Phone
Authors: Hotta Aira , Okumura Haruhiko , Minamizaki Hironori 
Published: January 2009

AbstractWe developed a novel spatio‐temporal LAO processing method (ST‐LAO) that can be installed on LCD driver IC for a mobile phone by applying a novel edge‐enhancement processing to the linear approximation LAO method to reduce the LAO circuit size.
P‐58: Wide‐Range Dimming Control of LED Backlight for Avionic Displays
Authors: Chung Se‐Kyo , Lim Su‐Hyun , Lim Jeong‐Gyu , Shin Hwi‐Beom , Shin Min‐Jae , Sohn Seung‐Gurl 
Published: January 2009

AbstractThis paper deals with a wide‐range dimming control of a LED backlight for avionic AMLCDs. The design and implementation of a digital dimming controller using a current‐controlled buck converter and light sensor feedback are presented. The proposed system provides a brightness control capability in a wide dimming range of from 200fL to 0.05fL (4,000:1), which is suitable for avionic displays. The experimental results are provided to verify the control performance.
3.4:Invited Paper: A Novel Use of MEMS Switches in Driving AMOLED
Authors: Yoon Jun‐Bo , Lee Jeong Oen , Yang Hyun‐Ho , Jang Weon Wi 
Published: January 2009

AbstractAs the current thin film transistors (TFTs) for driving AMOLED have been made of amorphous silicon, poly‐Silicon, or organic materials, they have suffered from carrier mobility‐related problems. We proposed in this work a new idea of using MEMS switches as the TFTs, for achieving a better switching characteristic capable of conducting large current with high uniformity and stability. Using simulation and initial experiments with the metallic MEMS switches, we successfully demonstrated that the digital driving of OLED using MEMS switches was possible with gray scale. The fabricated 50μm × 10μm‐Sized switch conducted current of up to 15mA and it operated up to 1.3×105Cycles in a hot switching mode in air when the current was 57μA and switching pulse frequency was 100Hz. Complete active‐matrix driving of multiple OLED pixels is to be done.
P‐61: Temperature Coefficient of Diode‐Connected LTPS Poly‐Si TFTs and its Application on the Bandgap Reference Circuit
Authors: Lu Ting‐Chou , Zan Hsiao‐Wen , Ker Ming‐Dou , Huang Wei‐Ming , Lin Kun‐Chih , Shih Ching‐Chieh , Chiu Chao‐Chian , Liu Chun‐Ting 
Published: January 2009

AbstractThe temperature coefficient (TC) of n‐type diode‐connected polycrystalline silicon thin‐film transistors (poly‐Si TFTs) is investigated. The relationship between TC and the activation energy is observed and explained. It is also found that TC is not sensitive to the deviation of the laser crystallization energy. On the contrary, channel width can effectively modulate TC. By using the diode‐connected poly‐Si TFTs with different channel widths, a new bandgap reference circuit for precise analog circuit design on glass substrate is proposed and realized. From the experimental results in a LTPS process, the output voltage reference exhibits a very low TC of 195 ppm/ °C, between 25 °C and 125 °C.
P‐243L: Late‐News Poster: A 480‐Output TFT‐LCD Source Driver IC for COG Applications
Authors: Jeon Hyun‐Kyu , Hong Ju‐Pyo , Koh Man‐Jung , Hoang Duong Quoc , Kim Jun‐Ho , Kim An‐Young , Son Young‐Suk , Oh Hyung‐Seog , Han Dae‐Keun , Do Gun‐Woo , Seong Nak‐Jin , Cho Soon‐Dong , Jang Kyeong‐Kun , Kang Sin‐Ho 
Published: January 2009

AbstractA 480‐output TFT‐LCD source driver IC for a COG (Chip On Glass) application is presented. To reduce the cost of the TFT‐LCD module, COG technology is being adopted for the portable display devices. To achieve the high data rate transfer on the COG‐type TFT‐LCD module, an ACDS (Advanced Current‐mode Differential Signaling) interface is proposed. The offset compensating algorithm is adopted to alleviate the block dim phenomenon due to the offset of internal gamma buffers. The driver IC was fabricated in 0.35um high voltage CMOS technology process and evaluated with 13.3‐inch diagonal wide XGA (1280RGB×800) TFT‐LCD module of which cost was reduced significantly.
P‐62: Organic Surface of a TFT Array Treated with Nitrogen Plasma
Authors: Liao Hsin‐Ming , Huang Te‐Chun , Huang Guo‐You , Chen Mao‐Song , Huang Wei‐Ming 
Published: January 2009

AbstractThe photosensitive organic material for the hydrogenated amorphous‐Si (a‐Si) and low temperature Poly‐Si (LTPS) thin film transistors (TFTs) has been widely applied. Through the low dielectric organic layer, higher aperture ratio and higher LCD panel performance can be achieved. This study focus on the surface of organic material that treated by nitrogen plasma found the interface between the organic layer and Indium Tin Oxide (ITO) film wherein nitrogen‐containing compounds produced by the nitrogen plasma treatment. On the organic surface of TFT array, better adhesion with nitrogen plasma treatment than without treated may be attributed to C‐N‐In or C‐N‐Sn bond formation between the interface of nitrogenated polymer surface and ITO sputter layer.
P‐63: A New Transparent Plastic Substrate having High Heat Resistance and Low Retardation for Flexible Displays
Authors: Fujii Yasuyoshi , Makita Ken‐ichi , Okada Hisanori , Obara Naoto , Doi Toru 
Published: January 2009

AbstractWe have been developing a new transparent plastic substrate for flexible displays. The plastic substrate (OPS substrate) is composed of a newly developed base film (OPS film) and hard coat layers. The OPS substrate has excellent physical properties such as high transparency, low retardation and high heat resistance over 200°C. The coefficient of thermal expansion (CTE) is relatively low as 40–45ppm. The dimensional changes under various conditions including temperature and humidity were directly observed by using CCD camera.The electrical properties of the OPS substrate sputtered Indium Tin Oxide (ITO) at various temperatures were evaluated. The OPS substrate sputtered ITO at 200°C shows low sheet resistance as 10Ω/□ and it is almost same as that of glass substrate sputtered ITO under the same condition.
P‐72: Is the Photo‐Elasticity of PSAs for LCD Panels Reducible?
Authors: Kusama Kentaro , Matano Tadashi , Ohashi Yuki , Kobayashi Mamoru , Nagamoto Koichi 
Published: January 2009

AbstractTo overcome the light‐leakage problem of LCD panels the effect of the mechanical elasticity on the photo‐elasticity of pressure sensitive adhesives (PSAs) was investigated. Among various cross‐linked acrylic copolymer‐based PSAs those with UV irradiation had lower photo‐elasticity regardless of their high mechanical elasticity and resulted in minor light leakage.The 17 inch test panel fabricated with one of UV‐cured PSA formulations, of which photo‐elasticity coefficient was 3 × 10−11 N/cm2, had little light leakage even after thermal durability test at 80 °C for 500 hrs and no detectable defect after various durability tests.
P‐77: Polymer‐Based Plastic Electrode Film for PDLC Applications
Authors: Kim Jin‐Yeol , Kim Tae‐Wook , Woo Hak‐Yong , Kwon Sijoong , Park Su‐Cheol 
Published: January 2009

AbstractPlastic electrode films composed of poly (3,4‐ethylenedioxythiophene):p‐toluene sulfonate (PEDOT:PTS) have been fabricated by using depositing polymerization method in gas‐phase. These conductive PEDOT:PTS films have a high transparency up to 80%, and possess a very low sheet resistance down to 100 Ω/squre at 100‐nm thickness. We report on the fabrication and characterization of a PDLC device using a highly conductive PEDOT: PTS for the electrodes and demonstrate its superior performance relative to that of a similar device using the ITO layer as the electrodes.