bluuebunny/crossref_metadata_2025_split huggingface dataset:
P‐179: Modeling and Prototyping of Optically Compensated VA LCD
Authors: Lazarev Alexander , Geivandov Artur , Kasianova Irina , Kharatiyan Ellina , Palto Serguei 
Published: January 2009

AbstractA new double‐layer thin retardation film developed by Crysoptix provides an efficient optical compensation of vertically aligned LCD. The advantages of Thin Birefringent Film (TBF™) technology enable in‐cell application of the retarder. The VA LC cell prototyping confirms the optical simulation data.
P‐181: Axially Symmetric Liquid‐Crystal Polarization Converter
Authors: Tzeng Ying‐Yu , Ke Shih‐Wei , Ting Chi‐Lun , Fuh Andy Y.‐G. , Lin Tsung‐Hsien 
Published: January 2009

AbstractThis work demonstrates axially symmetric polarization converters based on photo‐alignment in dye‐doped liquid crystal (DDLC) films. A linear‐shape and linearly polarized beam is applied onto a rotated homogeneous DDLC cell to achieve three axially symmetric polarizations — radial, azimuthal and vortical. Additionally, the spiral degree of the axially symmetric vortical polarization can be controlled by varying the polarization of the pumping light and the simulation results agree well with the experiment.
P‐182: Novel Liquid Crystal Switch Array Based on Total Internal Reflection
Authors: Xu Peizhi , Ho Jacob , Chigrinov Vladimir , Kwok Hoi Sing 
Published: January 2009

AbstractA novel liquid crystal switch array based on TIR effect has been presented, which can be applied to not only the display area but also the communication area. Analysis and optimization for all the related parameters for the TIR‐based LC switch have been conducted. The prototype has been fabricated according to the obtained optimal configuration. High contrast and fast response can be observed in both simulation and experiment.
P‐183: Refraction Control in Optical Films for LCD
Authors: Lazarev Alexander , Geivandov Artur , Kharatiyan Ellina , Lazarev Pavel , Yurchenko Darya 
Published: January 2009

AbstractWe developed a method for manufacturing of coatable Thin Birefringent Films (TBF™) with control over values of three principal refraction indices. The control of ratios between principal refractive indices is based on varying formulation of the coatable material and conditions of post‐treatment of the coated film. NZ factor of the obtained retarders ranges from 0.0 up to 0.8.
P‐184: Optical Compensation for High Contrast Ratio in Reflective Horizontal Switching LC Cell
Authors: Choi Jung‐Min , Kim Kyung‐Mi , Ji Seung‐Hoon , Lee Gi‐Dong 
Published: January 2009

AbstractWe propose an optical configuration for the reflective liquid crystal (LC) cell with single polarizer that can show excellent contrast ratio by effectively eliminating phase dispersion. The proposed configuration consists of a half‐wave retarder, an A‐plate, a quarter‐wave LC cell and a reflector. We designed this optical configuration on a Poincaré sphere with the trigonometric method. From the calculation, we confirm that the proposed configuration provides high contrast ratio over than 2 times compared to the conventional configuration.
P‐185: Single Cell Gap Single Mode Transflective Liquid Crystal Display with High Optical Efficiency
Authors: Tan Li , Li Yuet‐Wing , Kwok Hoi‐Sing 
Published: January 2009

AbstractA transflective liquid crystal display with single cell gap single mode structure is reported. Electrically controllable birefringence (ECB) mode is applied at both reflective (R) and transmissive (T) regions. with optimized orientation of only two compensation films, very high brightness is achieved for both R and T regions. At the same time, the dark state has nearly no color dispersion. High contrast ratio is achieved. Moreover, the electro‐optical characteristics of R and T regions match with each other well. The fabrication process is also very easy.
P‐188: Optical Configuration of Transflective Liquid Crystal Display for Dynamic and Memory Operating Mode
Authors: Jhun Chul Gyu , Kim Sun‐Kyung , Park Sang‐Hyun , Min Kwan‐Sik , Kwon Soon‐Bum , Lee Joong Ha , Yoon Tae‐Hoon , Kim Jae Chang 
Published: January 2009

AbstractWe propose an optical configuration of transflective liquid crystal display (LCD), which can be operated not only as a bistable device but also as a monostable one. By using the parameter space diagram (PSD) method, the memory mode and the dynamic mode are optimized for a reflective type and a transmissive type, respectively. We demonstrate excellent optical performance of our transflective dual mode, such as an excellent dark state and high contrast ratio.
P‐189: Fast Response Transflective Display Using a Tight Pitch Ferroelectric Liquid Crystal in a Single Gap Configuration
Authors: Kim Dong‐Woo , Jang Eunje , Lim Yong‐Woon , Lee Sin‐Doo , Yu Chang‐Jae 
Published: January 2009

AbstractWe report on a fast response transflective display using a vertically aligned tight pitch ferroelectric liquid crystal (FLC) in a single gap configuration. The optical path difference between transmissive and reflective regions is compensated by adopting in‐plane electrodes on two substrates and on one substrate, respectively. In our transflective FLC display, several unique features such as uniform alignment, fast response, and gray scale capability are demonstrated.
P‐191: Reflective LCD Mode of Twisted Liquid Crystal Designed for Low Voltage Driving
Authors: Lee Chang‐Hoon , Gwag Jin Seog , Lee You‐Jin , Kim Jae‐Hoon 
Published: January 2009

AbstractWe have investigated a reflective type of nematic liquid crystal display (LCD) using 180° twisted state configuration in the π cell which comprises one polarizer and one optical retardation film. This reflective mode has lower driving voltage as well as sufficient gray. Consequently, proposed reflective LC mode could be suitable for low power consumption with excellent optical image by various gray levels.
P‐193: Single Gap and Single Gamma Transflective Display Using Fringe‐Field Switching Mode
Authors: Kim Jin Ho , Chin Mi Hyung , Jeong Eun , Lim Young Jin , Srivastava Anoop Kumar , Lee Seung Hee 
Published: January 2009

AbstractA new transflective liquid crystal displays associated with fringe field switching (FFS) mode is proposed. The device utilizes unique characteristic of the FFS mode in which the rotation angle of LC director is dependent on electrode position in on state. with optimization of pixel electrode width and distance between them, the LC director could rotate about 22.5° and 45° depending on electrode positions. Consequently, the region with low and high rotation angle could be played as reflective and transmissive regions, respectively, realizing a high image quality transflective display with single gap and single gamma characteristics.
P‐258L: Late‐News Poster: Analysis of Internal Reflectance in AFFS Plus Technology
Authors: Park Jun Baek , Choi Suk , Shin Young Joon , Park Kwang Hyun , Cho Yoon Sung 
Published: January 2009

AbstractIn this paper, we have investigated about internal reflectance in AFFS plus. Internal reflectance is composed of metal and pixel reflectance. From the calculation, designed metal reflectance is almost same to measured reflectance. To improve pixel reflectance and outdoor readability, DBEF sheet and negative LC with high efficiency is adopted.
P‐194: New 8‐Domain MVA LCD with Reduced Color Shift
Authors: Lu Ruibo , Wu Shin‐Tson , Lee Seung Hee , Li Wang‐Yang , Wei Chung‐Kuang 
Published: January 2009

AbstractA new MVA LCD is proposed by introducing an electric shielding layer to divide a unit pixel into at least two different regions with different threshold voltages. Such a MVA exhibits a wide view angle and much weaker color shift using only one TFT which is attractive for TV applications.
P‐195: Enhanced Outdoor Readability in AFFS Plus Technology by Negative LC
Authors: Choi Suk , Park Jun Baek , Jang Soon Ju , Park Kwang Hyun , Cho Yoon Sung 
Published: January 2009

AbstractIn this paper, we have developed 10.4 inch XGA tablet with upgraded advanced fringe‐field switching plus (AFFS+ Ver.2). AFFS+ Ver.2 adopts optimized electro‐dynamics technology of negative LC with high reflectance (∼ 2.0%) and high contrast ratio (∼ 900:1) as well as high transmittance (∼9.3%) for superior outdoor readability.
P‐198: Azimuthally Continuous Nematic Domain Mode Using Electrode Structure with Circular Slit
Authors: Bae Kwang‐Soo , Gwag Jin Seog , Han In‐Yung , Lee You‐Jin , Choi Yoonseuk , Choi Jong‐Sun , Kim Jae‐Hoon 
Published: January 2009

AbstractWe proposed azimuthally continuous nematic domain (ACD) mode characterized by a cone‐like‐ field of patterned electrode with a circular slit. Such an electrode structure avoids the domain defect induced in a turn of chevron type electrode of patterned vertical aligned nematic (PVA) mode. Consequently, this ACD mode has wider viewing and higher transmittance with maintaining the merits of PVA mode. Therefore, we expect that this proposed mode will be applied to various liquid crystal displays.
P‐201: Chiral Hybrid In‐Plane Switching LC Mode for High Brightness and Contrast Ratio
Authors: Kim Young‐Ki , Gwag Jin Seog , Lee You‐Jin , Kim Jae‐Hoon 
Published: January 2009

AbstractWe propose a new liquid crystal display (LCD) mode, named as chiral hybrid in‐plane switching (CHI) mode, which has high brightness and contrast ratio by using a twist effect applied to a conventional hybrid mode on the interdigitated electrode. The mode is optimized to normally white mode without any loss of transmittance on the electrode. The mode has also excellent darkness under field on because LCs are well aligned parallel to the optics axis of polarizer due to lower bulk elastic strength.
P‐203: The Improvement of White OLED's Performance
Authors: Nishimura Kazuki , Kawamura Masahiro , Jinde Yukitoshi , Yabunouchi Nobuhiro , Yamamoto Hiroshi , Arakane Takashi , Iwakuma Toshihiro , Funahashi Masakazu , Fukuoka Kenichi , Hosokawa Chishio 
Published: January 2009

AbstractWe have researched further improvement upon three‐component white OLED devices with using fluorescent materials disclosed in SID'07. The long lifetime over 70,000hr@1,000cd/m2 maintaining at a high efficiency of 20cd/A was achieved by optimization of a carrier balance with using new carrier transport materials. Performance of blue and red OLEDs were also developed in order to enhance capability of white OLEDs, respectively. A long lifetime of 50,000hr@1,000cd/m2 was achieved by a new light blue dopant BD‐5. Meanwhile, we studied phosphorescent materials for the red device to progress towards further low power consumption. A low driving voltage of 4.4V at 10mA/cm2 and a long lifetime of 100,000hr@1,000cd/m2 were realized by employing a new host material and new carrier transport materials. These materials will contribute to large‐Size OLED TVs with color filter method or lighting application for practical use.
P‐204: Distinguished Poster Paper: A Near Infrared OLED for Day/Night Display
Authors: Brooks Jason , Michalski Lech , Ma Ray , Hack Mike , Brown Julie J. , Borek Carsten , Griffe Laurent , Thompson Mark E. 
Published: January 2009

AbstractRecently there has been a growing interest in OLEDs that emit in the near infrared region (700–1250nm) for covert night vision applications. Here we report our results on a highly efficiency phosphorescent metalloporphyrin OLED device with a λmax= 765 nm. We will demonstrate a bi‐color day/ covert night active matrix display fabricated on flexible metal using this material for the IR pixel.
P‐205: OLED Display Sharpness with Diffuser
Authors: Cok Ronald S. 
Published: January 2009

AbstractLight is trapped within thin‐film LED devices due to the high optical index of the light‐emitting layers. This light can be extracted from the LED by locating a diffuser within the high‐index optical structure. However, such a diffuser can decrease the sharpness of the emitted light if the device is not properly constructed. Issues associated with diffusers in thin‐film LED devices are discussed. A suitable structure for an OLED with an experimental demonstration and measurement of device sharpness is described.
P‐206: Improved OLEDs with Single Ambipolar Material for Hole‐Transport and Electron‐Transport Layers
Authors: Lin Mei‐Fang , Wong Wai‐Kwok , Cheah Kok‐Wai , Tam Hoi‐Lam , Tse Shing Chi , So Shu‐Kong , Chen Chin H. 
Published: January 2009

AbstractAn organic light‐emitting device (OLED) with enhanced efficiency by employing an ambipolar material, 2‐methyl‐9,10‐di(2‐naphthyl)anthracene (MADN) as both hole‐transport and electron‐transport layers has been developed. The efficiency of the device is more than 40% enhanced compared with a control device. Moreover, the operational stability is also greatly improved as it minimizes the formation of all unstable redox species of Alq3+ as well as NPB−.
P‐209: New Green Phosphorescent Host Materials
Authors: Jeon Woo Sik , Park Tae Jin , Park Jung Joo , Kim Sun Young , Pode Ramchandra , Jang Jin , Kwon Jang Hyuk 
Published: January 2009

AbstractWe report novel bipolar host materials for high efficiency green phosphorescent organic light emitting diode devices (PHOLEDs). Phenyl moieties were inserted in a 4,4′‐N,N′‐dicarbazolebipheyl (CBP) structure to reduce electron injection barrier and enhance electron mobility. The significant improvement of current and power efficiencies and reduction in turn‐on voltage in green light‐emitting PHOLEDs by this modification are observed. At a given constant luminance of 1000 cd/m2, current efficiency 53 cd/A, low driving voltage 6.5 V, and power efficiency 27 lm/W in 4,4′‐N,N′‐dicarbazoleterpheyl (CTP) host with Ir(ppy)3 dopant are reported. Results show better performance in green PHOLEDs with new host materials than CBP.
P‐210: Phosphorescence Ranging from Blue to Red from tris‐Cyclometalated Iridium (III) Complexes and Application to Organic Light‐Emitting Devices
Authors: Ren Xiaofan , Liao Liang‐Sheng , Giesen David J. , Deaton Joseph C. , Klubek Kevin P. 
Published: January 2009

AbstractColor tuning in the Ir(III)‐based phosphores has been accomplished by alteration of the cyclometalated ligand (C∧N). Highly efficient phosphorescence with emission peaks in the blue, green, yellowish‐green, yellow, and red spectral regions has been realized and their use in organic light‐emitting devices (OLEDs) is described in this paper. Efficient blue phosphorescent devices can achieve external quantum efficiencies up to 8.8% at 1 mA/cm2 with CIE coordinates of (0.14, 0.23). with the addition of one bluish‐green‐emitting and four red‐emitting coumarin‐based Ir(III) dopants to the family of the coumarin‐based Ir(III) dopants reported previously, highly efficient and long‐lived OLEDs, with colors ranging from green, yellowish‐green, yellow, to red, have been realized. Incorporation of these coumarin‐based cyclometalated Ir(III) dopants into novel tandem OLED structures gives highly efficient and stable white OLEDs.
3.1: Distinguished Paper: 12.1‐Inch WXGA AMOLED Display Driven by Indium‐Gallium‐Zinc Oxide TFTs Array
Authors: Jeong Jae Kyeong , Jeong Jong Han , Choi Jong Hyun , Im Jang Soon , Kim Sung Ho , Yang Hui Won , Kang Ki Nyeng , Kim Kwang Suk , Ahn Tae Kyung , Chung Hyun‐Joong , Kim Minkyu , Gu Bon Seog , Park Jin‐Seong , Mo Yeon‐Gon , Kim Hye Dong , Chung Ho Kyoon 
Published: January 2009

AbstractThe full color 12.1‐inch WXGA active‐matrix organic light emitting diode (AMOLED) display was, for the first time, demonstrated using indium‐gallium‐zinc oxide (IGZO) thin‐film transistors (TFTs) as an active‐matrix back plane. It was found that the fabricated AMOLED display did not suffer from the well‐known pixel non‐uniformity of luminance, even though the simple structure consisting of 2 transistors and 1 capacitor was adopted as a unit pixel circuit, which was attributed to the amorphous nature of IGZO semiconductor. The n‐channel a‐IGZO TFTs exhibited the field‐effect mobility of 8.2 cm2/Vs, threshold voltage of 1.1 V, on/off ratio of > 108, and subthreshold gate swing of 0.58 V/decade. The AMOLED display with a‐IGZO TFT array would be promising for large size applications such as note PC and HDTV because a‐IGZO semiconductor can be deposited on large glass substrate (> Gen. 7) using conventional sputtering system.
P‐212: Architecture Design for Efficient True‐Blue Phosphorescent OLEDs
Authors: Chen Chung‐Chia , Chang Chih‐Hao , Wu Chung‐Chih , Yang Cheng‐Han , Chi Yun 
Published: January 2009

AbstractIn this paper, we report an effective architecture for true‐blue phosphorescent OLEDs using a series of novel blue‐emitting Ir complexes. It incorporates double‐emitting layers (one hole‐transport, one electron‐transport) and double buffer layers, for achieving balanced carrier injection/transport and carrier/exciton confinement. The efficiencies of true‐blue phosphorescent OLEDs can be up to 13.7% photon/electron, 20.4 cd/A, 14 lm/W, with the true‐blue CIE coordinates of (0.157, 0.189).
P‐218: High‐Efficiency White Organic Light‐Emitting Diodes Using Hybrid‐Spacer
Authors: Seo Ji Hoon , Seo Ji Hyun , Kim Young Kwan , Hyung Gun Woo , Hwang Jang Hwan , Shin Dong Myung , Lee Kum Hee , Kwon Young Soo , Yoon Seung Soo , Kim You Hyun , Kim Woo Young 
Published: January 2009

AbstractThe authors have demonstrated high‐efficient white organic light‐emitting diodes (WOLEDs) using three‐emitting materials, 4″‐(2,2‐diphenylvinyl)‐1‐[4‐(N,N‐diphenylamino)‐styryl]‐terphenyl (PVAS‐tPh) as a blue emission, fac‐tris(2‐phenypyridine) iridium(III) (Ir(ppy)3) as a green emission, bis(5‐benzoyl‐2‐phenylpyridinato‐C,N)iridium(III) (acetylacetonate) ((Bzppy)2Ir(III)acac) as a red emision. for higher efficiency, hybrid‐spacer (HS) was inserted between each emissive layer (blue‐red, red‐green, and green‐blue emissive layers). It was found that the WOLEDs using HS showed maximum power efficiency of 28.69 lm/W, maximum external quantum efficiency of 13.1%, and Commission Internationale de I'Eclairage (CIEx,y) coordinates of (x=0.37, y=0.37), respectively.
P‐220: NPB‐Based RGB Single‐Layer OLEDs
Authors: Tsung Ka Kin , Tse Shing Chi , So Shu Kong 
Published: January 2009

AbstractA blue single‐layer organic light‐emitting diode (OLED) was fabricated using a common hole transporter, N,N′‐diphenyl‐N,N′‐bis (1‐naphthyl) (1,1′‐biphenyl)‐ 4,4′diamine (NPB). By doping the NPB layer with RGB dopants, the luminance and the current efficiency have been improved enormously. The charge transport mechanism will also be examined.
P‐222: Solution‐Processed Red‐Emission Oligofluorene Electrophosphorescent Diodes
Authors: Li Juo‐Hao , Yang Yang , Andresen Sven 
Published: January 2009

AbstractEfficient red‐emission electrophosphorescent diodes based on a blend of oligofluorene host and phosphorescent dopant are demonstrated in this article. Devices have optimum performances with 1 wt% doping concentration and can be further enhanced by a process of solvent treatment before the deposition of cathode contact. As a result, a peak efficiency of 12 cd A−1 and 6 lm W−1 at 2000 cd m−2 is achieved at a CIE coordinate (0.66, 0.33).
P‐223: Enhanced Power Efficiency of Single‐Layer White Triplet Polymer Light‐Emitting Diodes by Blending with Polymer Oxides
Authors: Chen Yung‐Shiuan , Chien Shang‐Chieh , Chen Fang‐Chung , Lian Jan‐Tian , Tsou Chien‐Lung , Mo Chi‐Neng 
Published: January 2009

AbstractIn this study, we have demonstrated enhanced performance of blue, red and white phosphorescent polymer light‐emitting diodes PLEDs) by blending poly(ethylene glycol) (PEG) into the active layer of the devices. By introducing PEG into the PLEDs, the turn‐on voltages of these devices became lower than those of the conventional devices. In addition, the luminance efficiency and the external quantum efficiency of the blue and white phosphorescent PLEDs were both improved. Most important of all, because of the lower operating voltage, the higher power efficiency (7.3 lm/W, 1.5 lm/W, 4.6lm/W) of the blue, red and white phosphorescent PLEDs than those of the control devices (2.9 lm/W, 1.1 lm/W, 1.9 lm/W) have been achieved, respectively. Finally, the improvement mechanism will be discussed.
P‐224: Damage‐Free Cathode Coating Process for OLEDs
Authors: Prakash Shiva 
Published: January 2009

AbstractOLED displays require the growth of inorganic films over organic films. The inorganic film sometimes manifests as cathode metal (bottom‐emission displays), or as the optical enhancement layer (OEL, in top emission displays). Sputtering is the first process of choice in both cases due to simplicity, low cost and scalability. However, plasma damage to the organic underlayers prevents sputtering from being routinely used. A closed‐drift ion beam sputtering process was found effective in growing inorganic films with negligible damage to the organic underlayers.
P‐225: Suppressed Efficiency Roll‐Off in Phosphorescent Organic Light‐Emitting Diodes
Authors: Kim Sung Hyun , Jang Jyongsik , Yook Kyoung Soo , Kim Oh Young , Lee Jun Yeob 
Published: January 2009

AbstractOrigin of efficiency roll‐off in phosphorescent organic light‐emitting diodes was investigated with triplet mixed host devices and stable devices with little efficiency roll‐off was developed. Efficiency roll‐off was significant in the device with narrow recombination zone and charge leakage out of emitting layer at high luminance was critical to efficiency roll‐off. Efficiency roll‐off could be reduced in triplet mixed host device with broad recombination zone and little charge leakage at high driving voltage. Triplet mixed host devices with an exciton blocking layer showed a quantum efficiency over 90 % of maximum quantum efficiency at a luminance of 20,000 cd/m2.
16.3: Enhanced Oblique Viewing Angle Color Performance for S‐PVA Panels
Authors: Park Bongim , Moon Hoi‐Sik , Jun Bong‐Ju , Jeong Jae‐Won , Kim Nam Deog , Berkeley Brian H. , Kim Sang Soo 
Published: January 2009

AbstractViewing angle performance of LCDs is a key issue which has been approached by both subjective and statistical means. In this paper, we discuss causes of image quality degradation as a function of grayscale at a fixed off‐axis viewing angle, examining both luminance and chromaticity distortions. Oblique viewing angle performance of both 1G‐2D and 2G‐1D S‐PVA panel structures have been enhanced by controlling the two independent sub‐pixel data for each of red, green and blue.
P‐226: New Tris Bipyridyl Derivative as Hole‐Blocking and Electron‐Transporting Materials for Organic Light‐Emitting Devices
Authors: Ichikawa Musubu , Wakabayashig Kenta , Yokoyama Norimasa , Koyama Toshiki , Taniguchi Yoshio 
Published: January 2009

AbstractWe demonstrate that tris bipyridyl benzene (TbpyB) works well as an electron transporting and hole‐blocking material for organic light‐emitting diodes. Using TbpyB for phosphorescent organic light‐emitting diodes (OLEDs), we can obtain comparable high external quantum efficiency and a lower operation voltage without any additional hole‐blocking layer that must be needed usually. In other words, the TbpyB layer worked as a double functioned (hole‐blocking and electron‐transporting) layer, and TbpyB provides more simple fabrications of phosphorescent OLEDs that work at a lower power consumption.
P‐228: Degradation of White Light Emitting OLEDs
Authors: Song JungBae , Lee Sunghun , Kim Mu‐Gyeom , Kim Sang‐Yeol , Son Young‐Mok , Jeon Woo Sung , Won Jeongyeon , Song Inyong , Han Hyouk Soo , Kim Dai Kyu , Chung JaeGwan , Kang SungKee , Tamura Shinichiro , Kim JongMin , Choi JunHo , Ha JaeKook , Lee SungSoo , Chu ChangWoong 
Published: January 2009

AbstractWe firstly report the degradation analysis of multilayer structured WOLED by using spectroscopic and microscopic analytical methods. Our analytical results demonstrated that the interface between cathode and electron‐transporting layer is responsible for the intrinsic long‐term degradation of WOLEDs.