bluuebunny/crossref_metadata_2025_split huggingface dataset:
P‐168: Investigation of High‐Efficiency Electrophosphorescent Organic Light‐emitting Diodes with Double‐Emission Layers
Authors: Sun Jiaxin , Zhu Xiuling , Yu Xiaoming , Wong Man , Kwok Hoi‐Sing 
Published: August 2007

AbstractHighly efficient electrophosphorescent organic light‐emitting diodes (PHOLEDs) with double‐emission layers by doping both hole‐ and electron‐transport hosts with green dye bis(2‐phenylpyridine)iridium(III)acetylacetonate [(ppy)2Ir(acac)] have been fabricated and investigated. In particular, the dependence of performance characteristics on the thickness and doping concentration of the double‐emission layers is studied. By fine tuning these two parameters a peak luminous efficiency of 77cd/A, corresponding to 20.5% external quantum efficiency (EQE), is achieved at a current density of 0.053mA/cm2 from the optimized device. Even at 1000cd/m2, it still shows very high luminous efficiency of 71cd/A, with a power efficiency of 40lm/W. A shifting exciton formation zone with the driving current as well as triplet‐triplet annihilation can explain the efficiency profile observed experimentally.
P‐169: Efficient, Long‐Lifetime OLED Host and Dopant Formulations for Full‐Color Displays
Authors: Ricks Michele L. , Vargas J. Ramon , Klubek Kevin P. , Jarikov Viktor V. , Liao Liang‐Sheng , Helber Margaret J. , Begley William J. , Hatwar Tukaram K. , Conley Scott R. , Cosimbescu Lelia , Brown Christopher T. 
Published: August 2007

AbstractWe report developments in materials and formulations for blue, green, and red fluorescent OLEDs that provide lifetimes exceeding 15,000 h for a model display operating at 200 cd/m2with a polarizer. In addition, we describe improvements in electron transport and injection that result in a reduction in display power consumption of up to 55%.
P‐170: Decomposable Alkali Compounds as Alkali Metal Precursors for Organic Light‐Emitting Diodes
Authors: Duan Lian , Li Yang , Qiu Yong 
Published: August 2007

AbstractElectron injection in organic light‐emitting diodes (OLEDs) can be improved by incorporation of alkali metals into the cathode structures. Some of the alkali compounds, such as alkali carbonates and nitrides, would decompose to form alkali metal during vacuum thermal evaporation. These materials can be incorporated into cathode structures to improve OLED performances. We developed an improved quartz crystal microbalance method to quantitatively investigate the decomposition of these alkali compounds in situ. We found that Cs2CO3 and Li3N are ideal alkali metal precursors for OLEDs.
P‐172: Determination of Hole Mobilities in New Blue Emitting Organic Diodes by Means of Impedance Spectroscopy
Authors: Arredondo Belén , Romero Beatriz , Álvarez Ángel Luis , Gutiérrez‐Llorente Araceli , Quintana Xabier , Mallavia Ricardo , Vergaz Ricardo , Montilla Francisco , Sánchez‐Pena José Manuel , Otón José Manuel 
Published: August 2007

AbstractIn this work we have fabricated passive diode matrices based on a new blue emitting organic electroluminescent polymer. In order to determine the capacitive response at typical display operating frequencies, impedance vs frequency measurements have been carried out at different bias. In addition, hole mobilities have been extracted by fitting a new theoretical model to the measured admittance, that takes into account the effect of an injection barrier, obtaining values from 10−12 m2/Vs to 10−10 m2/Vs with increasing bias.
P‐173: Reduction of Shorting Defects in OLED Devices
Authors: Tyan Yuan‐Sheng , Farruggia Giuseppe , Cushman Thomas R. 
Published: August 2007

AbstractA method to reduce the detrimental effect of shorting defects in OLED devices is presented. The method involves the application of a transparent thin film of appropriate electrical resistance between two electrodes in order to divert the current away from the shorting defects.
P‐179: Low Blur Effect and High Light Extraction Efficiency Enhancement of Organic Light Emitting Displays with Novel Microstructure Attachment
Authors: Lin Chung‐Yu , Hsu Sheng‐Chih , Chen Kuan‐Yu , Lin Hoang‐Yan , Lee Jiun‐Haw , Wei Mao‐Kuo 
Published: August 2007

AbstractMicrostructure film attachment and surface roughing techniques had long been utilized to improve the light extraction efficiency from a light source with a high refractive index. Instead of merely concerning the efficiency for lighting purposes, we must take both the light extraction efficiency and image quality into account for display applications. The image blur was observed to decrease the contrast ratio and thus lower image quality. In our previous work, we have studied the image blur effect quantitatively and correlated it to the coverage ratio and light extraction efficiency. In this paper, we apply an innovative microstructure array arrangement to planar light emitting device, i.e., for organic light emitting display (OLED) to reduce the blur effect and keep almost the same efficiency as that obtained by applying a traditional microstructure array.
P‐183: Efficient Deep Blue, Blue, Green, Yellow, Reddish‐Orange and Red Organic Light‐Emitting Device using 2,7‐Dipyrenespirofluorene (DPSF) as a Fluorescent Emitting Host
Authors: Yen Feng‐Wen , Chiu Chao‐Yu , Lin I‐Feng , Teng Chin‐Ming , Lin Xin‐Hong 
Published: August 2007

AbstractDeep blue, blue, green, yellow, reddish‐orange organic light‐emitting device have been fabricated using the same emitting host 2,7‐dipyrenespirofluorene(DPSF). The different guests doped in DPSF are 2,2′‐Bis[(9,9′‐dimethyl‐9H‐fluoren‐2‐yl)‐(diphenyl) amino]spirofluorene(BFDSF) (deep blue), 2,6‐Bis[4‐(4‐methyldiphenylamino) styryl]naphthyl (BDSN) (blue), C545T (green), Rubrene (yellow), DCJTB (reddish‐orange). And deposit the same hole transporting material, 9,9‐Bis[4‐di(naphth‐2‐yl)aminophenyl] fluorene (BNAPF) and the same electron transporting material, 1,3‐Bis[2‐(2,2′‐bipyridine‐6‐yl)‐1,3,4‐oxadiazol‐5‐yl]benzene(Bpy‐OXD). All OLED devices exhibit excellent current efficiency and Commission Internationale de I'Eclairage coordinates at a current density of 20mA/cm2, are shown as 4.5cd/A, [0.15, 0.14] for deep blue device; 15.7cd/A, [0.15, 0.30] for blue device; 12.6cd/A, [0.26, 0.62] for green device; 7.8cd/A, [0.49, 0.50] for yellow device and 7.7cd/A, [0.61, 0.39] for reddish‐orange device. Using Alq3 and DPSF as co‐host to optimize the reddish orange device, the CIE coordinate [0.65, 0.35] of saturated red and 4.9cd/A of current efficiency are relatively obtained at 20mA/cm2. The studies of HOMO/LUMO energy levels, fluorescent exciting energy transfer from DPSF to all guests (PL & UV) and mobility of materials interpret DPSF extensively used as emitting host in full‐wavelength for organic light‐emitting devices (OLEDs).
P‐191: Novel Bipolar Materials Tailored for Phosphorescent OLEDs
Authors: Yamagata Sachiko , Murata Hiroko , Egawa Masakazu , Nakashima Harue , Inoue Hideko , Shitagaki Satoko , Ohsawa Nobuharu , Kojima Kumi , Seo Satoshi , Nomura Ryoji , Yamazaki Shunpei 
Published: August 2007

AbstractWe synthesized novel bipolar materials suitable for acting as host materials of phosphorescent organic light‐emitting diodes (OLEDs). Our molecular design strategy involves combining electron‐ and hole‐transporting components to produce a well‐balanced carrier transportability, which contributes to an increase in efficiency and a decrease in operation voltage of green and red phosphorescent OLEDs.
P‐208L: Late‐News Poster: Liquid Crystal Lasers for Projection Displays
Authors: Woltman Scott J. , Crawford Gregory P. 
Published: August 2007

AbstractThe liquid crystal laser presents itself as an interesting tool for projection displays, acting as the illumination source. Liquid crystal lasers are fast becoming an interesting area of research within the liquid crystal community. In utilizing integrating these systems with current liquid crystal display (LCD) projection systems, novel designs can be envisioned.
14.2: A General Theory of Light Recycling with Light Pipes/Tunnels and Their Applications in LED Illuminators
Authors: Ouyang George , Li Kenneth 
Published: August 2007

AbstractA general theory on light‐pipe/tunnel‐based recycling schemes, along with some experimental data obtained from LED illuminators, is presented in this paper. Light recycling is classified as angular, spatial, or mixed based on the angular filtering characteristics of the recycling process. The principles behind the three schemes are analyzed and some experimental results are presented at the end.
14.3: Ujoy Technology for Personal Projection
Authors: Moench Holger , Mackens Uwe , Pekarski Pavel , Ritz Arnd , Hermans Tony , S'Heeren Griet , Verbeek Wil 
Published: August 2007

AbstractPersonal projectors are compact and affordable devices used for gaming, entertainment or photo projection. A very bright light source is at least as important as for standard front projectors. The new 50W Ujoy lamp system with 1mm arc enables efficient projection systems with a screen brightness of 200–300lm. Lower cooling requirements, the potential for battery operation and the low voltage input makes it the ideal source for this new category of projectors.
14.5L: Late‐News Paper: High Collection Efficiency Fanless LED Source Module for Projectors
Authors: Chuang Shang‐Chih , Chen Chien‐Chuan , Chen Cheng‐Huan , Chen Shao‐Wen , Shen Sheng‐Che , Hsieh Ming‐Hsun , Wu Fu‐Hai , Tsai Tsung‐Han , Huang Heng‐Chun , Chen Yu‐Chu 
Published: August 2007

AbstractA LED source module, including large LED chip, LED ballast, flat‐plate heat pipe and associated illumination optics has been proposed as a total solution for light source of projector engine based on light pipe integrator with high lumen throughput requirement. The LED source module features simple illumination optics with high collection efficiency and fanless heat management scheme with low noise level.
15.4: People with Visual Impairment Prefer TV Viewing Using a Contrast Enhancement Consumer Product
Authors: Fullerton Matthew , Peli Eli 
Published: August 2007

AbstractA device that uses technology previously tested for those with visual impairment to improve video clarity has recently been implemented in a product marketed for home theater viewers with normal sight. We found it to benefit viewers with visual impairment, even with the settings aimed at normally‐Sighted users, suggesting that the higher enhancement capabilities not accessible from the user interface may benefit this population even more.
16.1: Uniform Discharge Hybrid Flat Fluorescent Lamp (HFFL)
Authors: Winsor Mark , Flynn James 
Published: August 2007

AbstractIn this paper, we offer a novel backlighting solution for LCD TVs. Xe, Ne or Hg vapor are discharged through parallel channels. Permeable passageway between insulated glass channels equalizes gas pressure and maintains discharge uniformity. This monolithic lamp, designed for 12000 cdm2, is capable of high brightness, long life, and mass production.
17.1: Invited Paper: High Performance OCB‐mode for Field Sequential Color LCDs
Authors: Ishinabe Takahiro , Miyashita Tetsuya , Uchida Tatsuo , Wako Kazuhiro , Sekiya Kazuo , Kishimoto Tadashi 
Published: August 2007

AbstractOptically compensated bend (OCB) mode is a promising technology for future high quality display devices due to its wide viewing angle without gray scale inversion and color shift, fast response speed, high contrast ratio and wide temperature range. This paper summarizes the developments of the OCB mode and the optical performance of OCB mode field sequential color LCD.
17.2: A Fast‐Switching LCD for Color‐Field‐Sequential Projection Displays
Authors: Koma Norio , Tanaka Yoshiki , Mitsuai Masashi , Uchida Tatsuo 
Published: August 2007

AbstractWe propose a novel fast‐switching LCD panel for color field sequential projection. This panel employs a layer of OCB (optical compensated bend) mode liquid crystal that is maintained at an elevated temperature by a built‐in ITO (indium tin oxide) heater and a thermal sensor. We call this method heated‐OCB. The heated‐OCB realizes a response time of less than 0.4 msec, and provides color field sequential projection with 2 or 3 times driving and small color break‐up.
17.3: Electro‐Optical Properties of Polymer‐Stabilized OCB and Its Application to TFT‐LCD
Authors: Hasegawa Ray , Kidzu Yuko , Amemiya Isao , Uchikoga Shuichi , Wakemoto Hirofumi 
Published: August 2007

AbstractTo eliminate an initial transition from splay to bend alignment, polymer‐stabilized OCB was developed. The influences of the monomer concentration and the applied voltage during UV irradiation were studied, and stable bend alignment in the absence of electric field was obtained. The large retardation change and the fast response were achieved by using a mixture of multifunctional LC acrylate monomers, and a 9‐inch full‐color polymer‐stabilized OCB TFT‐LCD with initial bend alignment and the contrast ratio of 250:1 was successfully developed.
17.4: Halogenated Non‐Planar Dopants for Fast Response Liquid Crystals
Authors: Kilickiran Pinar , Masutani Akira , Hollfelder Nadine , Nelles Gabriele , Yasuda Akio , Tadeusiak Andrzej , Sandford Graham 
Published: August 2007

AbstractWe introduce a major step forward in achieving liquid crystal mixtures with desired performances such as fast response speeds, high VHR, low driving voltages and no detrimental perturbations in the liquid crystal alignments, thus undisturbed black level and contrast ratios, by the use of halogenated non‐planar dopants.
18.2: MVA‐LCD with Low Color Shift and High Image Quality
Authors: Tai Meng‐Chieh , Chang Ming‐Hsuan , Liu Chih‐Chung , Chang Yueh‐Ping , Wang Ming‐Tsung 
Published: August 2007

AbstractFor a suitable design of capacitance‐coupling MVA‐LCD, the ratio of ITO area was determined, and the u'v' change was improved from 0.03 to 0.01. Reforming the lattice defect, the zigzag interlaced ITO makes the artifact image diminished. Furthermore, the image sticking that usually worsened in the capacitance‐coupling type is progressed.
18.4: Novel Gamma Correction Method Using an Advanced Capacitive Coupling Driving
Authors: Tsunashima Takanori , Kimura Hiroyuki , Kawamura Tetsuya , Aoki Yoshiro , Motai Tomonobu , Takahashi Koji , Kanuma Toshinori , Ishida Arichika , Nakamura Hiroki 
Published: August 2007

AbstractWe have developed a LCD panel for mobile‐use applications that adjusting each RGB gamma characteristics independently without increasing the scale of peripheral circuit. It has been realized by using the Capacitive Coupling driving method and optimizing the storage capacitances of R, G, and B subpixels independently.
19.1: Invited Paper: Development of Phosphorescent White OLED with Extremely High Power Efficiency and Long Lifetime
Authors: Nakayama Tomoyuki , Hiyama Kunimasa , Furukawa Keiichi , Ohtani Hirofumi 
Published: August 2007

AbstractWe developed white OLED device with extremely high power efficiency and long lifetime, in which blue, yellow‐green and red phosphorescent emitters were used. The performance achieved was 64lm/W, and 10000 hours of lifetime at initial luminance of 1000cd/m2 with light out‐coupling technique. New technologies, such as blue phosphorescent materials and sophisticated organic layer structure, were applied to the device. The device also exhibited good durability such as storage stability, which is important performance in practical use. We hope that the development discussed in this paper opens up a course to practical use of OLED in lighting sources for illumination use, backlights and others.
19.4: Large Area p‐i‐n Type OLEDs for Lighting
Authors: Tomita Yuto , May Christian , Toörker Michael , Amelung Joörg , Eritt Michael , Loöffler Frank , Luber Claus , Leo Karl , Walzer Karsten , Fehse Karsten , Huang Qiang 
Published: August 2007

AbstractAn OLED for lighting applications was successfully demonstrated on a 150mm ×150mm substrate with ITO anode. Additionally, ZnO: Al (ZAO) as an alternative transparent electrode for OLEDs was fabricated and applied to highly efficient p‐i‐n type green OLEDs and a white OLED for lighting applications. These devices showed similar performance as ITO anode based OLEDs.
20.3: Quantitative Analysis of Image Sticking in LCDs
Authors: Park Seung‐Chul , Lim Kyong‐Ho , Choi Sin‐Hu , Soh Hoe‐Sup 
Published: August 2007

AbstractWe have analyzed the phenomenon of image sticking and studied for the method of quantifying image sticking by the three different analysis methods. The three analysis methods are R_SEMU [1], Color Difference [2] and Luminance Ratio. We usually use a chessboard pattern to test the image sticking of LCD panels. A new method is NVP (Non‐uniformity value of panel). NVP removes a non‐uniformity luminance of a panel except the image sticking on the reference image and the image tested. The NVP increases the accuracy of the image sticking analysis. We have measured the image sticking after an image sticking test using a 2D CCD camera and then analyzed the data comparing with a reference image using R_SEMU, Color Difference and Luminance Ratio. We investigate which method is the best analysis one for the evaluation of the image sticking. We have developed an analysis software using VBA. This software can select the quantitative level of image sticking.
21.2: Invited Paper: An Overview of Dynamic Range Reduction
Authors: Reinhard Erik 
Published: August 2007

AbstractWith a surge of interest in high dynamic range imaging, techniques for displaying such images on conventional display devices are gaining in importance. Although the last review of dynamic range reduction algorithms appeared about a year ago, the advances in this field are rapid. In this paper, the current state‐of‐the‐art in dynamic range reduction is reviewed, with an emphasis on sigmoidal compression.
22.1: Invited Paper: An Integrated HMI Concept for Driver Information and Driver Assistance Systems
Authors: Knoll Peter M. 
Published: August 2007

AbstractIn modern vehicles, we are faced with a rapidly increasing flood of information to the driver. In addition to established information systems such as: radio, vehicle monitoring, mobile phones, high class vehicles feature navigation systems almost as a standard today. Currently, driver assistance and collision mitigation and collision avoidance systems are being integrated in vehicles.Future vehicle information systems will provide this huge amount of information mainly in two information centers: amore or less reconfigurable instrument cluster with driver relevant information and a center console display with driver and passenger relevant information. for these systems an appropriate bundling of the information, in conjunction with menu‐prompted operating techniques, is essential both, technically and ergonomically.First generation Night vision enhancement systems with image presentation in the dashboard have been introduced into the market. This puts new demands on the Human Machine Interface and Human Machine Interaction as well.In 2006, an updated version of the European Statement of Principles (ESoP) on human machine interface (HMI) for in‐vehicle information and communication systems has been published. It replaces the previous version from 1999 and takes new development in consideration. Also in 2006, a first proposal for a Code of Practice for the Design and Evaluation of Advanced Driver Assistance Systems (ADAS) was published.
23.4: Electro‐Optic Properties of Ferroelectric Nanoparticle / Liquid Crystal Dispersions
Authors: West John L. , Li Fenghua , Zhang Ke , Atkuri Hari M. , Glushchenko Anatoliy V. 
Published: August 2007

AbstractWe enhance the electro‐optic performance of liquid crystals by dispersing ferroelectric nanoparticles. Devices using these dispersions have lower driving voltages, faster switching speeds and higher contrast ratios. These changes are caused by increases in the dielectric anisotropy, birefringence and elastic constants and can be used to produce improved displays.
24.4: Optical Sensor Embedded Input Display Usable under High‐Ambient‐Light Conditions
Authors: Hayashi Hirotaka , Nakamura Takashi , Tada Norio , Imai Takayuki , Yoshida Masahiro , Nakamura Hiroki 
Published: August 2007

AbstractWe have developed a new LCD having optical input function usable under high ambient‐light conditions. Sensors having different sensitivities are dispersed in the panel, and a sensor driver circuit to control the sensor exposure time are formed monolithically in peripheral using LTPS technology. These two approaches contribute synergistically to widen the range of ambient light condition available for the input function.
25.1: Invited Paper: Achieving Efficient Solid State Lighting Using Organic Light Emitting Devices
Authors: Forrest Stephen R. 
Published: August 2007

AbstractA significant challenge facing human kind in the 21st Century is how to address the ever decreasing supply of depletable and renewable energy. One approach to this problem is to decrease our usage. for this reason, considerable attention has been focused on more efficient means for room lighting which currently consumes approximately 20% of the total energy used. Organic light emitting devices (OLEDs) provide a unique opportunity to provide this high efficiency solid state lighting at very low cost. In this talk, I will discuss several strategies for achieving very high efficiency white light emission at high brightnesses for the next generation of efficient solid state lighting sources based on small molecular weight, vapor deposited OLED structures. Key to our approach is the use of electrophosphorescence as a means for converting all electrical into optical energy. We show that the highest luminance efficiencies can be obtained by a combination of fluorescence and phosphorescence in a unique OLED structure. Furthermore, the highest brightnesses are achieved (without a significant loss in power efficiency) by stacking several fluorescent/phosphorescent elements in a single OLED structure (called a SOLED), with each emitting element in the stack separated by a transparent charge generation layer. Prospects for OLEDs as the next practical generation of interior illumination sources will be reviewed.
25.4: Advances and Issues in White OLED and Color Filter Architecture
Authors: Chu Changwoong , Ha Jaekook , Choi Junho , Lee Sungsoo , Rhee Jungsoo , Lee Dongwon , Chung Jinkoo , Kim Hyoseok , Chung Kyuha 
Published: August 2007

AbstractSince the scalability of OLED process is crucial factor for TV application, white OLED with color filter has been developed for large‐Size AMOLED panel. Despite of recent technology advancement enabling high color purity, large‐Sized AMOLED, a lot of problems to solve still exist to enter the large‐Sized display market. Here, Samsung will discuss what has been concerned for large panel and how far the OLED technologies need to go for the marketplace of large‐Sized display.
26.3: Characterizing LCD Motion Color Artifacts Using Simulation Methods
Authors: Li Xiaohua , Chai Lin , Teunissen Kees , Heynderickx Ingrid 
Published: August 2007

AbstractA method to characterize motion color artifacts from temporal step response measurements of the primary colors is proposed. The apparent image is calculated from the Motion Picture Response Curves, which are the result of the convolution of the step responses with a one‐frame wide shift function. The model predictions are validated with a perception experiment.
26.4: Relationship between LCD Response Time and MPRT
Authors: Boher Pierre , Glinel David , Leroux Thierry , Bignon Thibault , Curt Jean Noël 
Published: August 2007

AbstractIn the present a study we relate the conventional temporal behavior of LCD displays generally expressed in terms of response time versus gray levels to the motion artifact called moving picture response time (MPRT). The idea is to use the luminance temporal behavior of the display measured between gray levels using OptiscopeSA instrument to predict the blurred edge profile of moving bars at given scrolling velocity and frame frequency. We show first that this approach is valid since the temporal behavior of one pixel is independent of the others. Then we apply this approach on two different LCDs: one with a conventional temporal behavior and another with overdrive and underdrive.