bluuebunny/crossref_metadata_2025_split huggingface dataset:
P‐157: Effect of the Sputtering Condition on the LC Alignment Properties of SiO2 Layer
Authors: Sung Shi‐Joon , Yang Kee‐Jeong , Kim Dae‐Hwan , Do Yun Seon , Choi Byeong‐Dae 
Published: January 2009

AbstractThe relationship between the sputtering condition and the LC alignment properties of SiO2 layer was investigated. According to the RF power of sputtering, the Ar pressure showed a different effect on the LC alignment on SiO2 layers, which might be closely related with the thin layer formation process.
P‐160: Alignment of Liquid Crystal with Inkjet Printed Polyimide for Flexible Liquid Crystal Displays
Authors: Hwang Jeoung‐Yeon , Chien Liang‐Chy 
Published: January 2009

AbstractWe demonstrated a non‐rubbing liquid crystal alignment method utilizing an inkjet printed polyimide (PI) layer for liquid crystal displays using flexible substrates. A uniform LC alignment on the plastic substrates was achieved by a two‐step inkjet printing method; first by the PI printing and followed by the empty cartridge printing. The disparity in electro‐optical performance for the twisted nematic (TN) cell with inkjet printed PI on plastic substrates and the cell with rubbed PI alignment layers is negligible.
P‐254: Late‐News Poster: Investigation into Stability of Liquid Crystal Alignment with Newly Developed Polyimide Based Photopolymer
Authors: Cho Han‐Dong , Jung Un‐Sung , Jhun Chul Gyu , Kwon Soon‐Bum , Park Seo‐Kyu , Yang Yoon Chul , Ahn Taek , Yi Mihye 
Published: January 2009

AbstractWe investigated the UV and thermal stability of newly developed PI based photopolymer. Image sticking effects of the test cell fabricated by the photoalignment method is compared to that by the rubbing method. Not only the UV and thermal stability, but also the image sticking effect is equivalent to those of the test cell fabricated by the rubbing method. We also demonstrate IPS cell fabricated by the photoalignment method with our material.
P‐170: Color Writable Cholesteric Liquid Crystal Display and its Operation Principle
Authors: Lee Da‐Wei , Shiu Jyh‐Wen , Chang Yu‐Pei , Hsieh Cheng‐Hsi , Lee Hsin‐Hung , Tsai Yi‐Shou , Chen Guan‐Ting 
Published: January 2009

AbstractColor Writable Cholesteric Liquid Crystal Display (CHLCD) and its operation principle were developed. By applying strong‐enough electric field (ex: ±10V/100Hz square wave for 4um cell gap) to specific pixels, we could choose the color and directly write it to color CHLCD, because the pressure we released was canceled by the electric field. By applying appropriate electric field and/or pressure, gray levels could be achieved. In the application that we wrote a different color to CHLCD on which a written color existed, the electric field and the pressure had to be coordinated (ex: ±5.5V/10Hz, 1kgw/cm2), and other approaches were also proposed.
P‐172: Power Consumption Reductive Driving Method for the Electrophoretic Display
Authors: Kim Joo‐young , Hwang Hyun‐Sik , Jung Ho‐young , Park Chul‐woo , Souk Jun‐hyung 
Published: January 2009

AbstractWe describe the new driving scheme for reducing power consumption of electrophoretic displays. Most power consumption arise from switching the source line voltage of TFT. Furthermore, comparing with LC display devices, electrophoretic devices is driven on higher voltage during its driving duration. This characteristic makes disadvantage to make handheld electronic devices on the view point of power save. Our new method suggests reducing swing numbers of the source line. We will show result with simulated and real power measured data.
P‐174: Stabilization of High‐Brightness Relaxed Bend State and Investigation of Fast‐Switching Symmetric H State in a Pi‐Cell by Synchronized Illumination Technique
Authors: Yang Bo‐Ru , Elston Steve J. , Raynes Peter , Shieh Han‐Ping D. 
Published: January 2009

AbstractThe non‐permanent states in a pi‐cell have interesting electro‐optical performances: the symmetric H (Hs) state has sub‐millisecond response times and the non‐biased bend (we term it as “relaxed bend,” RB) state before collapsing into the twist state has high brightness. However, the short lifetime of these states makes them difficult to be studied and utilized. We propose a synchronized illumination technique to investigate the Hs state and stabilize the RB state. After stabilizing, the brightness of the ON‐state is increased by a factor of 1.18 compared with the normal pi‐cell; moreover, the intensity dynamic range of the RB state stabilized pi‐cell is larger than that of the conventionally polymer‐stabilized pi‐cell.
P‐180: Enhancement of Predictability for Optical Properties of LC Simulator
Authors: Yang Sung Hoon , Lee Yong Woo , Park Mun‐Soo , Lee Jae Ho 
Published: January 2009

AbstractThe predictability of a Liquid Crystal simulator has been investigated. Three critical parameters for the simulator i.e., transmittance, response time and viewing angle, were determined. The optimization was performed through elaborative correlation between experimental and simulation results. The results with optimized parameters show good agreement with experimental results within an error tolerance of 10%. The determined main parameters regarding each optical property are summarized and discussed.
P‐186: High Quality Patterned Retarder for Transflective LCDs
Authors: Hasebe Hiroshi , Kuwana Yasuhiro , Nakata Hidetoshi , Yamazaki Osamu , Takeuchi Kiyofumi , Takatsu Haruyoshi 
Published: January 2009

AbstractA patterned retarder for a transflective LCD can be fabricated by photo polymerization of a liquid crystalline monomer. It is required for the retarder that pattern size is smaller than pixel size of a LCD and that retardation of the retarder is thermally stable against over 200°C. We have optimized liquid crystalline monomer and fabrication processes of the retarder to achieve high quality patterned retarder.
P‐187: Photoaligned Transflective Liquid Crystal Display Using Low Twist Nematic and Electricity Controlled Birefringence Modes
Authors: Mak Hin Yu , Xu Peizhi , Du Tao , Chigrinov Vladimir , Kwok Hoi Sing 
Published: January 2009

AbstractIn this paper, transflective liquid crystal display (LCD) with two different modes low twist nematic (MTN) and electricity controlled birefringence (ECB) has been proposed. The structure contains only a single cell gap in transmissive and reflective part, therefore the fabrication process is easy and only one more step UV exposure is needed during photoalignment process to produce domains. This configuration has a good contrast, viewing angle, response time and transmittance / reflectance. As a result it is suitable for high quality transflective thin‐film transistor (TFT) LCDs.
15.3: Anti‐Electromigration of Lead‐Free Ag/Frit Modified Address Electrodes in PDPs
Authors: Kim Chul‐Hong , Jeong Hyun‐Mi , Heo Eun‐Gi , Lee Byung‐Hak , Yu Byoung‐Youl , Lee Byung‐Chul , Kim Hyun‐Don , Kweon Tae‐Jong 
Published: January 2009

AbstractWe have studied on the usage reduction and anti‐migration properties of newly formulated lead‐Free (Bi‐based) Ag/Frit modified address electrode (hereinafter VE electrode) systems in PDPs (Plasma Display Panels). It is thought that their high performance such as anti‐migration and the cost‐competitiveness without any loss of performance in paste, process and luminous efficacy are originated from the optimum controlling of Ag/Frit weight ratio and low specific gravity by low Ag contents, respectively. Currently, lead‐free VE electrodes are being applied as main electrode materials of PDP panels fabricated by SDI photo‐imageable patterning process including ultra‐fine resolution models.
P‐190: Wide‐Band Transflective Liquid Crystal Display in a Patterned Vertically Aligned Mode with a Single Cell Gap
Authors: Kim Kyung‐Bae , Gwag Jin Seog , Lee You‐Jin , Lee Hyeok Jin , Kim Jae‐Hoon 
Published: January 2009

AbstractWe propose optical configuration for wide‐band characteristics in transflective liquid crystal display with a single cell gap at patterned vertically aligned mode. Difference of the optical path between transmissive and reflective parts is compensated by designing the electrode structure and adopting two retardation films which show wide band characteristics calculated from mirror imaging method.
P‐199: Achromatic Reduction of Off‐Axis Light Leakage in LCDs by Self‐Compensated Phase Retardation (SPR) Film
Authors: Yang Young‐Chol , Yang Deng‐Ke 
Published: January 2009

AbstractWavelength dispersion of refractive indices of compensation films causes the problems of light leakage and color shift at oblique incident angles in the black state of liquid crystal displays. We propose a self‐compensated phase retardation (SPR) film reducing the light leakage stemming from the wavelength dispersion of compensation films. Numerical calculations show that SPR films suppress the leaked light significantly more than the state‐of‐art compensation scheme used in vertical alignment mode liquid crystal displays.
P‐202: High Transmittance LC Pixel Design for Multi‐View 3D Mobile Display
Authors: Mphepö Wallen , Wu Chi‐Lin , Huang Yi‐Pai , Chuang Shang‐Chih , Chen Cheng‐Huan , Shieh Han‐Ping D. , Hsu Shih‐Chia , Lin Ching‐Huan , Hu Chih‐Jen 
Published: January 2009

AbstractUsing a 6‐view 3D mobile display, a modified LC pixel mode that increases transmittance and brightness uniformity for each viewing zone plus pixel electrode physical re‐configuration capable of increasing Aperture Ratio were investigated. The pixel mode utilized was the single‐domain VA. In the modified case of the single domain VA mode with the reconfiguration, it was observed that by optimizing each pixel, the transmittance of the single‐domain VA could be improved by more than 24% at relatively wide, mobile display, viewing angles from ∼9 ° to ∼30 ° compared with conventional multi‐domain VA.
16.1: 82″ Ultra Definition LCD Using New Driving Scheme and Advanced Super PVA Technology
Authors: Kim Sang Soo , You Bong Hyun , Cho Jung Hwan , Moon Sung Jae , Berkeley Brian H. , Kim Nam Deog 
Published: January 2009

AbstractSamsung has developed an ultra definition (UD, or 3840×2160) resolution 82″ product for LCD TV applications. The resolution increase from full HD to UD greatly reduces available charging time. This problem has been overcome by employing a half‐gate two‐data line design (hG‐2D) for super PVA pixels. Additionally, cost effective single bank driving has been achieved by adopting a vertical quarter partitioned (VQP) scheme. Viewing angle of 180 degrees, contrast ratio of 2200 to 1, and brightness of 550nits have been achieved while maintaining all other advantages of the super PVA structure.
P‐207: Novel Buffer Materials with High Work Function for Efficient and Stable Organic Light‐Emitting Diodes
Authors: Huh Dal Ho , Lee Jeong Woo , Kang Eui Su , Chae Miyoung 
Published: January 2009

AbstractWe introduce novel water based buffer materials with high work function (5.5 − 5.6 eV), thermal stability, and low acidity (> pH 3). These materials are even stable at both neutral and basic conditions (> pH 7). When PLED devices are fabricated, even though there are high energy barrier between ITO (ca. 4.8 eV) and the buffer material and each buffer layers compared with that between ITO and Baytron‐P, J‐V characteristics of the device with our buffer layers are more improved than those with Baytron‐P series (AI 4083 and CH 8000). Also their performance showed higher luminous efficiency (170% @ 1000 nit) and better device lifetime (>1.7 times) using new buffer materials compared with those of Baytron‐P series even though we have yet to optimize the device structures.
P‐208: Flexible OLEDs with Anodes Formed by Vapour Phase Polymerization
Authors: Levermore Peter A. , Wang Xuhua , Chen Lichun , Bradley Donal D. C. 
Published: January 2009

AbstractWe report improved performance from ITO‐free organic light emitting diodes (OLEDs) prepared with vapour phase polymerization poly(3,4‐ethylenedioxythiophene) (VPP‐PEDOT) anodes. By inserting additional interfacial anode layers based on triarylamine polymers, we demonstrate VPP‐PEDOT OLEDs on rigid glass substrates that display improved electroluminescence characteristics, and which have efficiencies that are comparable to equivalent ITO‐based devices. We also report on the development of flexible OLEDs (FOLEDs) with VPP‐PEDOT anodes, demonstrating efficient red, green, blue and white‐emitting devices with significantly improved device rectification.
P‐211: High Quantum Efficiency of New Deep‐Blue EML Materials in OLED
Authors: Kim Soo‐Kang , Park Young‐Il , Park Jong‐Wook , Jaung Jae‐Yun 
Published: January 2009

AbstractWe investigated new deep blue emitting materials including a novel side group such as CB‐203. CB‐203 shows relatively 40% increased PL quantum efficiency and higher Tg of 30°C compared to MADN. It exhibits high External Quantum Efficiency (EQE) of 7.18% that is two times bigger than MADN's, which is the best efficiency in case of non‐doped blue fluorescence OLED device to our knowledge. And deep blue emitting materials with a new core structure (CB‐301) have been synthesized. CB‐301 exhibit excellent blue fluorescence properties. Undoped OLED devices using CB‐301 as blue emitters was found to deep blue CIE value (0.154, 0.078) and exhibit high luminance efficiencies of 2.01cd/A at 10 mA/cm2.
16‐2: A Novel S‐PVA Cell Structure with High Contrast Ratio
Authors: Kim Su Jeong , Kim Kwang‐Hyun , Jung Jiyoon , Heo Jeong‐Uk , Lee Nam‐Seok , Kim Kyeong‐Hyeon , Kim Sang Soo 
Published: January 2009

AbstractThis paper describes a new S‐PVA cell structure which achieves enhanced contrast ratio by adopting a step‐like patterned common electrode between the high sub‐pixel and low sub‐pixel electrodes without loss of transmittance. A 24‐inch panel was developed for monitor applications and measured contrast ratio and white luminance were over 2500:1 and 400cd/m2, respectively.
P‐214: Ultra Thin‐Film Encapsulation for AMOLED Displays
Authors: Lee Young‐Gu , Park Jong‐Jin , Kee In‐Seo , Shim Hong‐Shik , Ko Ick‐Hwan , Choi Yun‐Hyuk , Bulliard Xavier , Kim Sang‐Yeol , Kim Jong‐Min 
Published: January 2009

AbstractA 5.4‐inch AMOLED display was prepared using the combination of ultra thin film encapsulation steps with alternative organic and inorganic hybrid multi‐layers. Organic layers for smoothing and improved adhesion were prepared by polyurea condensation with vapor deposition polymerization. Al2O3 inorganic layers were sequentially deposited on organic layers by sputtering. All processes were performed at room temperature. After optimization of the organic and inorganic layer deposition process, device operating lifetime performance was over 85%, as compared with glass encapsulation, and the transmittance of thin film multilayered structure was over 90% in the visible region.
P‐217: 120% Luminance Enhancement of OLED by Patterned Microlens Array
Authors: Ho Yu‐Hsuan , Chen Kuan‐Yu , Lin Hoang‐Yan , Lee Jiun‐Haw , Fang Jheng‐Hao , Wei Mao‐Kuo 
Published: January 2009

AbstractWe demonstrate a 120% luminance enhancement, experimentally and theoretically, by attaching a patterned microlens array film on a conventional bottom emission OLED. Design rules were established qualitatively and quantitatively, which include: (1) pixel size affects the microlens arrangement, (2) smaller pixel has larger luminance enhancement, and (3) luminance enhancement is most obvious at the normal direction.
P‐219: Color Stability of White Light‐Emitting Organic Electroluminescent Device Base on Three Phosphorescent Emission Peaks
Authors: Shieh Tien‐Shou , Lin Jin‐Sheng , Liu Pey‐Ching , Chu Miao‐Tsai , Tseng Mei‐Rurng 
Published: January 2009

AbstractColor stability of white organic light emitting diodes (WOLEDs) was developed by three emission peaks. The blue phosphorescent sensitizer was Bis(3,5‐difluoro‐2‐(2‐pyridyl)phenyl‐(2‐carboxypyridyl) iridium (Firpic), the orange phosphorescent sensitizer was the thieno‐pyridine framework organo‐iridium complexes (PO‐01), and the red phosphorescent sensitizer was the phenyl‐qoinazoline framework organo‐iridium complexes (PR‐01). An orange/red phosphorescent emitting layer was sandwiched between blue phosphorescent emitting layers. The devices exhibited no change of EL spectra according to the driving voltage. The efficiency of WOLED of 11.6lm/W (17.4Cd/A) at 1000 Cd/m2, a CIE coordinates of (0.43, 0.44), and a CRI of 81. It is good suitability to use in OLED lighting.
P‐221: Enhancement of Electroluminescent Property of Inverted Top‐Emitting Organic Light Emitting Diodes with Transparent AgOx by O2 Plasma
Authors: Hong Kihyon , Kim Kisoo , Lee Jong‐Lam 
Published: January 2009

AbstractWe demonstrate a transparent AgOx top anode by formed by O2 plasma treatment for inverted top‐emitting organic light emitting diodes (ITOLEDs). The turn‐on voltage decreased from 22 to 12 V, and the luminance increased from 175 to 630 cd/m2 by using this transparent AgOx anode. The AgOx lowered the injection barrier for holes, enhancing the electroluminescent properties of ITOLEDs.
P‐230: Novel Electrical‐Chemically Polished Stainless Steel Anode Organic Light Emission Device with Long Lifetime at High Luminance for Flexible Lighting
Authors: Yu Xiaoming , Sun Jiaxin , Zhu Xiuling , Wong Man , Kwok Hoi Sing 
Published: January 2009

AbstractStainless Steel (s.s.) sheet substrate was electrical‐chemically polished. Afterwards its average surface roughness reached 1.93nm. Then Organic Light Emission Devices (OLEDs) were fabricated on it with Alq3 as the light emission material (EM) (called Devices SSA). So high‐thermal‐conductive s.s. was made use of directly as anode in Devices SSA. Lighted at initial luminance intensity 1135 cd/m2, Devices SSA decayed to its half luminance after 18 hours (hrs) in the vacuum which has pressure of 5×10−3 Pa. At the same time, top emission OLEDs with evaporated aluminum anode on glass (called Devices AA) were fabricated with the same EM. Devices AA have 20.5 hrs half lifetime but much lower initial luminance intensity 296cd/m2, as measured in the same vacuum condition. The maximum luminance (Lmax) of Devices SSA is 61,200cd/m2, which is 2.3 times as high as Lmax of Devices AA. In this paper, Device SSA with s.s. substrate thickness 0.05mm and bending radius 2mm is demonstrated. It indicates a bright future of flexible lighting application. White OLEDs on this substrate is being researched and longer lifetime could be achieved soon under better condition.
P‐236: LED Light Recycling with Recycling Collars
Authors: Ouyang George , Li Kenneth 
Published: January 2009

AbstractAs a follow‐up to our previous work we present in this paper a detailed study on LED light recycling with a recycling collar. for the PhlatLight™ LED devices that we use in our experimnets up to 75% brightness improvement has been achieved. Higher enhancement factors can be expected if we use LEDs with rougher emitting surfaces as the recycling efficiency of angular recycling configurations such as the recycling collar depends strongly on the scattering characteristics of the LED chip surface. More experimental work is expected to be carried out in the near future on multiple‐chip configurations.
P‐238: Limiting Relation and Image Behavior on Bending a Wedge Display
Authors: Kong D. L.‐H. , Travis A. R. L. 
Published: January 2009

AbstractManufacturing of Wedge displays can never really achieve 100% surface flatness due to the physical constraints of the tools used and a Wedge display seems immune to slight bends even with the presence of such limits. We show, for each input angle between 42° and 62°, the maximum angular error which can be introduced by a bend of constant curvature is related to its thickness, radius of curvature, the angle of the ray before entry into the bend, and the bend length. An approximate relation is made to describe the simulated result of the behavior of such maximum angular error with varying bend lengths.
P‐250L: Late News Poster: Low‐Speckle Laser Projection with a Broad‐Area VCSEL in the Incoherent Emission Regime
Authors: Riechert Falko , Lemmer Uli , Verschaffelt Guy , Craggs Gordon , Meuret Youri , Van Giel Bart , Thienpont Hugo 
Published: January 2009

AbstractWe demonstrate low speckle laser projection using a 850nm‐VCSEL driven in an incoherent emission regime as illumination source. We achieve speckle contrast values as low as 4.4 % without using any additional or mechanically moving components to destroy the coherence of the laser beam.
18.1: Electronic Compensation for Fringe‐Field Effects in VAN LCOS Microdisplays
Authors: Cuypers Dieter , de Smet Herbert , Van Calster André 
Published: January 2009

AbstractAlthough fringe field effects in LCOS projection panels can be suppressed sufficiently not to interfere with the optical performance needed for consumer applications, precise grey‐level reproduction in professional applications still requires a detailed knowledge of the occurrence of disclinations at all driving voltages and neighboring pixel configurations. Such a study is presented in this paper, allowing the implementation of an electronic compensation for the fringe field effects.
18:3: Late‐News Paper: Polarization Independent Liquid Crystal Microdisplays
Authors: Komanduri Ravi K. , Oh Chulwoo , Escuti Michael J. , Kekas D. Jason 
Published: January 2009

AbstractWe demonstrate a polarization‐independent, diffractive, liquid crystal microdisplay on a reflective 256×256 pixel silicon backplane using nematic liquid crystal polarization gratings. Striking results are observed in a single‐panel projector with remarkably simple optics, where the technology supports up to ∼75% throughput (reflectance) of unpolarized light, contrast ratios approaching 1000:1, and < 800 μs total switching time.
19.1: Invited Paper: Driver IC Packaging Technologies Using Anisotropic Conductive Films in Flat Panel Display
Authors: Watanabe Itsuo , Gotoh Yasushi 
Published: January 2009

AbstractAnisotropic conductive films (ACFs) are adhesive films with anisotropic conductivity induced by dispersing conducting particles such as metal coated plastic balls and metal particles into polymer matrices such as thermoplastics and thermosetting resins. ACFs have been widely used for driver IC packaging technologies in FPDs(Flat panel displays) such as LCDs(Liquid crystal displays) for last two decades. So far various packaging technologies such as TCP(Tape carrier package) on LCD panel or PWB(Printed wiring board), COF(Chip on flex) on LCD panel or PWB, and COG(Chip on Glass) using ACFs have been realized to meet the requirement of fine pitch capability and make the flat panel displays smaller, lighter and thinner. In this paper, the history of ACF and driver IC packaging are described. In addition, it is mentioned that how important driver IC packaging is in implementing the miniaturization, high resolution, low cost and high display quality. ACF material design for COF which is advantageous in fine pitch interconnection is described. It is indicated that low temperature curable ACF is very useful in improving productivity of LCD modules and reducing the thermal stress at the interface in large LCD modules. We also indicates that the warpage of LCD panel after COG interconnection induces the light linkage issue in LCD modules. Lowering bonding temperature of ACF is also very important in reducing the warpae issue and avoiding the light linkage issue when COG is applied for driver IC packaging in large LCD modules.
4.3: LCD Response Time Evaluation in the Presence of Backlight Modulations
Authors: Becker Michael E. 
Published: January 2009

AbstractThis paper introduces a method for evaluation of the response times of LCDs when the measured temporal luminance function is dominated by periodic fluctuations induced by the pulse‐width modulation (PWM) circuit used for dimming of the backlight luminance. We present our implementation of deconvolution of the transition between the stationary states which is slowed‐down by the process of convolution (i.e. moving window averaging). with this method considerable errors in the evaluation of response times can easily be avoided and more realistic dynamic characteristics can be obtained for LCD‐monitors and LCD‐TVs. A second improved method is also outlined.