bluuebunny/crossref_metadata_2025_split huggingface dataset:
P‐144: Control of Liquid Crystal Director through Defined Pretilt Angle in Vertical Alignment Mode Surrounded by Polymer Wall
Authors: Kim Sung Min , Kim Sang Gyun , Kim Youn Sik , Lee Hee Kyu , Lee Myong‐Hoon , Lee Gi Dong , Lyu Jae Jin , Kim Kyeong Hyeon , Lee Seung Hee 
Published: August 2007

AbstractWe proposed vertical alignment liquid crystal devices (VALCDs) in which the vertically aligned LC is surrounded by polymer wall, named locked‐super homeotropic (LSH) device. Although the device has advantages of wide‐viewing angle, spacer‐free and simple fabrication, it exhibited relatively slow rising response time due to undefined azimuthal tilting direction with bias voltage. To resolve the problem, we fixed pretilt angle of VA using the polymerization of reactive mesogen (RM) with bias voltage. Conclusively, dynamic stability of LC directors is improved, exhibiting a fast response time.
P‐149: Multireflection Effects of the Compensated Black States in Liquid Crystal Displays
Authors: Jang Yong‐Kyu , Bos Philip 
Published: August 2007

AbstractThe effect of multiple internal reflections on a perfectly compensated black state of a LCD is studied. We found the previously unexplained wavelength dependence of light leakage is caused by the interference of the ordinary and extraordinary waves, and they could place a limit on the performance of liquid crystal devices used as displays and optical switches.
P‐150: Dynamics of Electro‐Optical Switching Processes in Surface Stabilized Biaxial Nematic Phase
Authors: Lee Ji‐Hoon , Lim Tong‐Kun , Kim Won‐Taeck , Jin Jung‐Il 
Published: August 2007

AbstractHere we report the dynamics of electro‐optical switching processes in the biaxial nematic phase of an oxadizole‐based bent‐core liquid crystal (LC). This LC exhibits optical biaxiality in the lower temperature range of the nematic phase although it exhibits optical uniaxiality in the higher temperature range. In particular, the short axis and the long axis of the LC were independently switched when an electric field was applied in the biaxial nematic phase. The switching time of the short axis was much faster than that of the long axis in response to the applied field as well as in relaxation.
P‐154: Efficient White OLEDs Employing Phosphorescent Sensitization
Authors: Chang Chih‐Hao , Lu Yin‐Jui , Liu Zhi‐Zhe , Wu Chung‐Chih , Yeh Yung‐Hui 
Published: August 2007

AbstractEfficient white OLEDs employing phosphorescent sensitization are investigated. Devices with a single phosphor‐sensitized emitting layer can give colors close to (0.33, 0.33) and efficiencies up to (10%, 23 cd/A, 13.4 lm/W). Devices with a sensitized emitting layer and a low‐concentration phosphorescent layer further enhance the efficiencies up to (12.1%, 35.3 cd/A, 23.9 lm/W). In all phosphor‐sensitized WOLEDs, the efficiency roll‐off at higher currents is much reduced.
P‐156: Polymeric Electrophosphorescent Devices with Low Turn‐on Voltages and High Power Conversion Efficiency by Blending with Poly(ethylene glycol)
Authors: Chien Shang‐Chieh , Chen Fang‐Chung 
Published: August 2007

AbstractPhosphorescent polymer light‐emitting diodes (PLEDs) with low turn‐on and operating voltages and high power efficiency have been achieved by blending poly(ethylene glycol) (PEG) into the active layer. The luminance efficiency of the device with Al as the cathode achieves to 16cd/A. In addition, the device performance of this kind device with the Ca/Al and LiF/Ca/Al cathode architecture after blending of 10 wt.% PEG was also investigated. It is found that the driving voltages of the devicse were lower than those of the conventional devices, while the luminance efficiencies remind high. Consequently, a higher power conversion efficiency (14 lm/W) than that of the control device (9 lm/w) has been achieved.
P‐160: White Organic Light‐Emitting Diodes Based on Single White Dopant of Heteroleptic Tris‐Cyclometalated Iridium(III) Complex
Authors: Seo Ji Hyun , Lee Young Hee , Kim Young Sik , Kim Young Kwan , Kim You Hyun , Kim Woo Young 
Published: August 2007

AbstractWe report white organic electroluminescent device based on single white dopant, Ir(dfppy)2(pq). The similar phosphorescent lifetime of two ligands lead to emit luminescence in two ligands at the same time, the emission wavelength of single white dopant has a broad peak and emit white color without the intramolecular energy transfer.
P‐164: Highly Efficient White Organic Light‐Emitting Diodes Using Two Emitting Materials for Three Primary Colors (Red, Green and Blue)
Authors: Seo Ji Hoon , Seo Ji Hyun , Park Jung Hyun , Kim Young Kwan , Kim Jun Ho , Hyung Gun Woo , Lee Kum Hee , Yoon Seung Soo , Kim Woo Young 
Published: August 2007

AbstractThese results have demonstrated the highly efficient white organic light‐emitting diodes (WOLEDs) with two separated emissive materials for the three primary colors, red, green, and blue, using blue fluorescent and red phosphorescent dopants. The two devices with the optimum structure showed a maximum luminance of 30500 and 20400 cd/m2 and a luminous efficiency of 38.0 and 32.7 cd/A. Furthermore, device B showed better CIEx,y coordinates of (x=0.36, y=0.35) at 10V. We expect that the WOLEDs fabricated using device structures and materials described here may be applicable for backlights in liquid crystal displays.
P‐166: Highly Efficient Organic Light‐Emitting Devices with Double Interfacial Layers
Authors: Park Jin Ho , Oh Seung Seok , Kim Sun Woong , Choi Jin Sung , Choi Eun Ha , Hong Byoung Hee , Kim Yun Ki , Seo Yoon Ho , Cho Guang Sup , Park Byoungchoo , Lim Jongsun , Yoon Sung Cheol , Lee Changjin 
Published: August 2007

AbstractWe report on a highly efficient phosphorescent organic light‐emitting devices achieved by introducing nanoscale double interfacial layers. The double interfacial layers play multiple roles in the enhancement of devices performance: increasing electron injection, hole‐blocking, and preventing luminescence quenching at the electrode surface. As an experimental result, current efficiency was improved to 240%, yielding a peak brightness over 40,000 cd/m2 and peak efficiency over 60 cd/A.
P‐174: Triplet Exciton Diffusion in Hybrid Fluorescent/Phosphorescent OLEDs
Authors: Deaton Joseph C. , Kondakova Marina E. , Kondakov Denis Y. , Pawlik Thomas D. , Giesen David J. 
Published: August 2007

AbstractA hybrid OLED comprising blue fluorescent and red phosphorescent emitters is reported. External quantum efficiencies for the blue and the red components of the electroluminescence along with time‐resolved measurements, magnetic field effect, and ED‐EPR experiments suggest that the recombination occurs in the blue emissive layer producing fluorescence with the singlet excitons, while the triplet excitons are utilized upon migration to the red layer.
P‐177: Characterization of Orange OLED Stack for Bidirectional Active‐Matrix OLED Microdisplays
Authors: Kreye Daniel , Toerker Michael , Richter Bernd , Sonnabend Thomas , Vogel Uwe , Amelung Joerg 
Published: August 2007

AbstractHighly efficient, low‐voltage organic light emitting diodes (OLEDs) are well suitable for the integration into a CMOS‐process.An orange emitting phosphorescent OLED‐stack with doped charge transport layers was prepared on different types of CMOS substrates. First OLED deposition was done on a single diode 6″‐Wafer substrate and afterwards on a micro structured two metal layer CMOS test substrate without active transistor area.The different test substrates were measured and compared with respect to their performance (current, luminance, voltage, luminance dependence on viewing angle, optical outcoupling etc.)For bidirectional microdisplay applications the dynamic characteristics of the OLED stack are also of interest. Therefore the charge and discharge behaviour and the switch on and switch off delay time of voltage apply to luminance output are measured and summarised in a simple model.
P‐178: High‐Efficiency Long‐Lifetime Phosphorescent OLED Devices Based on Electron‐Trapping Iridium (III) Complexes
Authors: Ren Xiaofan , Tyan Yuan‐Sheng , Madaras Marcel B. , Rajeswaran Manju , Deaton Joseph C. , Giesen David J. 
Published: August 2007

AbstractWe have developed new iridium (III) complexes having coumarin, including its aza‐analogue structure, in their ligands. These Ir complexes are highly emissive with colors ranging from yellow, yellowish‐green to green. Electrochemical analysis shows that the reduction and oxidation potentials of these complexes occur at significantly less negative and more positive potentials, respectively, than are found for typical Ir(III) complexes in OLEDs, indicating these complexes are electron trapping instead of hole trapping. Long‐lived phosphorescent OLEDs fabricated with these new Ir complexes give external quantum and power efficiencies above 18% and 33 lm/W, respectively.
P‐181: Solution Processable White PLED Materials for Displays and Lighting
Authors: Pounds Thomas J. , Wilson Richard J. , Grizzi Ilaria , Yamada Takeshi 
Published: August 2007

AbstractSolution processable materials are important for the fabrication of low cost displays and lighting. In this paper we present the development of state of the art white Polymer‐LED materials with a long lifetime, high colour rendering index and good colour stability over operating lifetime.
P‐184: A High Efficiency Bilayered Red Phosphorescent OLED
Authors: Kwon Jang Hyuk , Park Tae Jin , Jeon Woo Sik , Jeong Su Hyeon , Park Jeong Ju , Lee Yong Kyun , Jang Jin 
Published: August 2007

AbstractWe report a high efficiency red phosphorescent OLED (PHOLED) with organic bilayered structure. The structure of bilayered red PHOLEDs was ITO/ N,N″‐di(naphthalene‐1‐yl)‐N,N″‐diphenyl‐benzidine (NPB)/new host: Ir(piq)3/LiF/Al. A high current efficiency of 10.0 cd/A and a power efficiency of 7.8 lm/W at 500cd/m2 was demonstrated in this device. The operation driving voltage to reach 1000 cd/m2 was 4.5 V and CIE coordinate was (0.67, 033). This bilayered PHOLED fabricated by a new phosphorescent host material resulted about 3 times enhancement of power efficiency compared with that of a CBP based control device.
P‐185: High Efficiency Solution Processed Red Phosphorescent OLEDs Based on a Soluble Small Molecule Host with an Ir(piq)3 Complex
Authors: Park Tae Jin , Jeong Su Hyeon , Jeon Woo Sik , Park Jung Joo , Lee Yong Kyun , Kwon Jang Hyuk , Jang Jin 
Published: August 2007

AbstractWe demonstrate that solution processed high efficiency and saturated red phosphorescent OLEDs can be achieved using a soluble small molecule (SSM) as the host material. Two structures of ITO /PEDOT /interlayer /SSM:Ir(piq)3 /LiF /Al and ITO /PEDOT /interlayer /SSM:Ir(piq)3 /sublimated Balq /sublimated Alq3 /LiF /Al were employed as all soluble processed devices and hybrid devices, respectively. A 6.36 cd/A of maximum luminance efficiency and a 3.22 lm/W of maximum power efficiency were obtained in a hybrid device. The CIE coordinate was (0.67, 0.33).
P‐186: OLEDs Integrated with Solar Cells: High Contrast and Energy Recycling
Authors: Yang Chih‐Jen , Cho Ting‐Yi , Wu Chung‐Chih 
Published: August 2007

AbstractBy integrating OLEDs with solar cells, ambient‐light reflection as low as 1.4% (even superior to that achieved with polarizers) can be achieved without compromising the EL efficiency. for high‐contrast display applications; Furthermore, in such a device, the incident photon energy and a portion of the OLED emission that does not get outside of the device can be recycled by conversion to electrical power. These features, we believe, make this technique attractive for high‐contrast display applications and portable/mobile electronics that are power aware.
P‐188: Single‐Panel Spatial‐Color and Sequential‐Color LCOS Projectors Using LED Lamps
Authors: Huang H. C. , Leung K. Y. , Kwok H. S. , Zhang B. L. , Chen Y. C. 
Published: August 2007

AbstractWe present and compare two single‐panel LCOS projectors using LED lamps. The 0.59″ sequential‐color LCOS microdisplay with integrated frame buffers can deliver 10.5 lm by a 4W red, green and blue LED. The 0.59″ spatial‐color LCOS microdisplay with white sub‐pixels can deliver 14 lm by a 6W white LED.
P‐206L: Late‐News Poster: Low Electric Consumption 3.6W Green SHG Laser Light Source Applicable to Laser Projection Systems
Authors: Furuya Hiroyuki , Mizushima Tetsuro , Mizuuchi Kiminori , Morikawa Akihiro , Itoh Tatsuo , Shikii Shin‐ichi , Yamamoto Kazuhisa , Kadowaki Shin‐ichi , Hiratsuka Takashige , Takagi Susumu , Mizoh Yoshiaki 
Published: August 2007

AbstractHighly‐efficient fully air‐cooled green laser light source with frequency doubling module is reported. As a result, 3.6 watts green laser light generation with about 9% wall‐plug efficiency is achieved. By using fully air‐cooled RGB lasers including the green SHG (Second Harmonic Generation) laser and illumination optics for speckle noise reduction, a laser projection engine is prototyped. A laser rear‐projection system with this laser projection engine shows several merits; wide color gamut (133%NTSC), 61inch large screen size, and low electric power consumption (less than 100W, at 650cd/m2).
P‐207L: Late‐News Poster: Spherical Glass Encapsulated LEDs for Display Light Sources
Authors: Nakamura Nobuhiro , Sekine Minoru , Matsumoto Shuji , Watanabe Kazunari , Sugimoto Naoki 
Published: August 2007

AbstractA glass material and a spherical glass encapsulation process for LEDs were developed. An LED encapsulated by the spherical glass exhibits high directional characteristic and emits collimated lights. The spherical glass encapsulated LEDs are suitable for light sources for displays such as portable projection systems and LCD back lights.
14.1: Efficient and Compact Illumination in LED Projection Displays
Authors: Van Giel Bart , Meuret Youri , Bogaert Lawrence , Thienpont Hugo , Murat Huseyin , de Smet Herbert 
Published: August 2007

AbstractIn this paper we propose an efficient illumination engine for LED based projection systems. Our design had to be both compact and efficient. We designed the projector with two LCOS light panels. We investigate two phenomena that affect the optical efficiency of this projector. We show that a relevant gain of the light output can be obtained by using certain methods.
14.4L:Late‐News Paper: Development of Long Life, Full Spectrum Light Source for Projection Display
Authors: Joshi Chandrashekhar J. 
Published: August 2007

AbstractA new high performance light source has been developed utilizing RF drive plasma technology called LIFI™. This new light source is capable of delivering a light intensity suitable for projection HDTV's up to 70″ and with further development is applicable to front projectors. with start times averaging 6 seconds or less and an estimated life time of 100,000 hours, LIFI™ meets the demands of next generation TVs. This is the first RF drive light source to be produced in high volume for the projection display market. This paper describes the technology and reports the performance of the LIFI™ light source.
15.1: Invited Paper: Influence of 8‐bit vs 11‐bit Digital Medical Displays on Observer Performance and Visual Search
Authors: Krupinski Elizabeth A. , Roehrig Hans , Fan Jiahua 
Published: August 2007

Abstract8 vs 11‐bit medical displays were evaluated. Six radiologists viewed 100 chest images. There was no significant difference in ROC Az as a function of bit‐depth. Average Az with 8‐bits was 0.8284 and with 11‐bits was 0.8253. There was a significant difference in viewing time favoring the 11‐bit displays.
15.3: Specificities of a Psycho‐Physical Test Room Dedicated for Medical Display Applications
Authors: Marchessoux Ceédric , Kimpe Tom 
Published: August 2007

AbstractThis paper presents specificities for implementing a psychophysical test room dedicated for medical display applications. The main use is to perform subjective measures in a normalized environment where results from other psycho‐physical studies can be compared. Standards‐Norms exist and are based on CRT measures, they must be adapted for studies on medical LCD.
21.3: New Metric for Display Color Gamut Evaluation
Authors: Chorin Moshe Ben , Eliav Dan , Roth Shmuel , Pagi Assaf , Ben‐David Ilan 
Published: August 2007

AbstractWe suggest a metric for evaluating color gamut of displays based on summing the probability of using a certain part of the display color gamut multiplied by an impact parameter for that color region. We further present methods for evaluating the probability of use, and the impact of color.
21.4: Primary Design of Wide‐Color‐Gamut Displays for Matching the Color Gamut of Objects
Authors: Wen Senfar 
Published: August 2007

AbstractThe method for designing the primary color coordinates of the wide gamut display that its color gamut matches object color gamut the best is studied so that the display can reproduce object color the most vividly. The display with three monochromatic primaries is taken as an example.
23.1: Invited Paper: Stability of Hysteresis‐Free Passively Adressed FLC Display with Inherent Gray Scale
Authors: Pozhidaev E. P. , Minschenko M. V. , Shadura O. A. , Andreev A. L. , Kompanets I. N. , Chigrinov V. G. , Kwok H. S. 
Published: August 2007

AbstractThe steadiness of hysteresis‐free passively addressed FLC display with an inherent memorized gray scale is governed generally by relationships between dispersion and polar parts of FLC anchoring energy with solid substrates.
23.2: Layer Rotation Mechanism of the Chiral Smectic C (SmC*) Phase
Authors: Jang Joo‐Nyung , Davey Anthony B. , Crossland William A. 
Published: August 2007

AbstractIn this work, we propose a model for the layer rotation of chiral smectic C* (SmC*), which is intended to give answers to some basic questions about smectic layer rotation.
23.3: Cholesteric Colloid of Ferroelectric Nano‐particles
Authors: Glushchenko Anatoliy , Buchnev Oleksandr , Iljin Andrey , Kurochkin Oleksandr , Reznikov Yuriy 
Published: August 2007

AbstractIn this paper, we report on the influence of sub‐micron ferroelectric particles on optical, dielectric and electro‐optical properties of cholesteric host. An ultra‐small fraction of ferroelectric nanoparticles in a cholesteric liquid crystal greatly increases the birefringence of the latter and its dielectric anisotropy that results in a broadening of the reflection band, decreasing of the driving voltage of the switching between bistable textures and in an increasing of its steepness.
24.1: A 2 Inch a‐Si:H TFT‐LCD with Backlight Control TFT Sensors
Authors: Kim Se Hwan , Kim Eung Bum , Choi Hee Yeon , Kang Dong Han , Park Won Hoon , Oh Jae Hwan , Lee Eun Young , Lee Seung Hoon , Oh Dong Hae , Kim Ka Hyun , Kang Moon Hyo , Hur Ji Ho , Jang Jin , Lee Jung Woo , Choi Jung Ryoul , Ahn Seung Hun , Hong Soon Won 
Published: August 2007

AbstractWe have developed a 2.0 inch a‐Si:H TFT‐LCD with the photosensors for detecting the brightness of backlight and outdoor daylight. Two kinds of sensors were embedded in the TFT backplane with a‐Si:H TFTs with bottom gate and top gate structures. A pixel has a switching TFT and a TFT sensor in addition to the capacitance. The TFT sensor exhibited the photo‐current of ∼10−9 A and dark current of ∼10−12 A in the operation region of backlight. The dynamic range is 60 dB which is high enough to sense the brightness of the backlight. The output signal saturates at ∼ 20000 Lux in the present work but it can be increased by decreasing the TFT size.
24.2: A 1300‐dpi Optical Image Sensor Using an a‐Si:H Photo Diode Array Driven by LTPS TFTs
Authors: Eguchi Tsukasa , Hiyoshi Yasunori , Kanda Eiji , Sera Hiroshi , Ozawa Tokuro , Miyazawa Takao , Matsumoto Tomotaka 
Published: August 2007

AbstractWe have developed a 1300‐dpi optical image sensor using a hydrogenated amorphous silicon (a‐Si:H) pin diode array driven by low‐temperature polycrystalline silicon (LTPS) thin film transistors (TFT) on a glass substrate. This paper describes a new architecture for achieving a high‐resolution optical image sensor using LTPS TFT production equipment.
24.3: Hybrid Touch Screen Panel Integrated in TFT‐LCD
Authors: Lee Joohyung , Park Jong‐Woung , Jung Dong‐Jin , Pak Sangjin , Cho Manseung , Uh Keehan , Kim Hyung‐Guel 
Published: August 2007

AbstractIt is, for the first time, presented that the touch panel function is fully integrated in 2.45 inch amorphous silicon QVGA TFT‐LCD using liquid crystal capacitive line sensor arrays with the same fabrication process as TFT‐LCD. It is capable of detecting touch event and finding touch positions by the capacitance change of liquid crystal in LCD. It demonstrates outstanding display qualities and superiority in size and thickness compared to conventional resistive touch screen panel.
26.1: Motion Blur Measurement and Evaluation: From Theory to the Laboratory
Authors: Becker Michael E. 
Published: August 2007

AbstractThis paper presents and compares motion blur data of an LCD‐monitor obtained with three different approaches: moving targets imaged with a stationary high‐speed camera followed by numerical analysis, evaluation of step and impulse‐responses measured with stationary test patters. A complete and detailed characterization of an electronic display including intended or parasitic lateral effects seems to require imaging methods and moving test‐patters while the evaluation of temporal transitions between different states of electrical driving (e.g. gray‐to‐gray transitions) provides easily accessible motion blur data that may be sufficient for many applications and product specifications.
26.2: Comparison of Motion Blur Measurement in LCD
Authors: Feng Xiao‐fan , Pan Hao , Daly Scott 
Published: August 2007

AbstractCompared to traditional CRT TV, LC TV has the shortcoming of motion blur. There are two causes for LCD motion blur: (1) LCD slow temporal response and (2) LCD backlight is always‐on (Hold effect). Motion blur can be characterized with the motion picture response time metric (MPRT). MPRT of a display can be measured spatially using a commercial MPRT instrument, but it is very expensive and difficult to use. In our previous papers, we modeled LCD motion blur through it temporal point spread function (temporal PSF) of an LCD device so that the LCD temporal PSF can uniquely determine the motion blur. The MPRT can thus be measured from the temporal measurement, which is much easier than the spatial tracking camera approach. In this paper, we compared the measured motion blur using both the spatial tracking camera approach and the temporal response approach at various backlight flashing widths. The temporal method can potentially replace expensive MPRT instrument.
27.2: Trade‐off between Luminance and Color in RGBW Displays for Mobile‐phone Usage
Authors: Wang Lili , Tu Yan , Chen Li , Teunissen Kees , Heynderickx Ingrid 
Published: August 2007

AbstractCompared to RGB displays, RGBW displays enable higher luminance levels at equal power consumption. One of their drawbacks, however, is their reduced color saturation. In this paper, the trade‐off between luminance and color saturation is evaluated in a perception experiment for several algorithms to map RGB input to RGBW pixel data. It is shown that the optimal mapping algorithm is affected by image content.
29.3: A New Fringe‐Field‐Switching LCD Using Trapezoid Electrodes
Authors: Lu Ruibo , Wu Shin‐Tson , Hong Qi , Wu Thomas X. 
Published: August 2007

AbstractA new trapezoid fringe field switching (T‐FFS) LCD is proposed. Simulation results indicate that the T‐FFS mode exhibits a high transmittance, wide viewing angle, and low operation voltage, regardless a positive or a negative dielectric anisotropy liquid crystal material is employed. with optimized compensation films, the 100:1 contrast ratio exceeds the ±85 ° viewing cone.