bluuebunny/crossref_metadata_2025 huggingface dataset:
P‐105: Collimating Optical System Made by Band Pass Filter
Authors: Qu Lianjie , Qi Yonglian , Hu Weipin , Yang Ruizhi , Xu Xiaoling , Gui Bingqiang , Zhao Hebin , Qiu Yun , Wang Dan
Published: June 2018

Collimating light source is important in AR/VR, 3D and other display products. At present, the collimating light source usually adopts micro lens, prism and so on. The structure and manufacturing process is complex. We present new research results for collimating light, which is a novel collimating LCD backlight technology using a photonic crystal and absorption type color film. There are no complex microstructures and collimating effect in the whole plane. We report progress with performance and describe methodology and results from experiment and simulation results. The angle of collimating light can be controlled in 20°.In the future, we'll optimize the structure and use this technology in the field of QDPR and privacy display.
P‐107: Titanium Dioxide Thin Film Coated ZnO Nanorods for Sensitivity Improvement Applying for Displays
Authors: Li Chaoyang , Zhang Qiang
Published: June 2018

The pure anatase structured TiO2 thin film was coated uniformly on the well‐arrayed ZnO nanorods by mist CVD method. The surface area of arrayed ZnO nanorods was increased significantly by TiO2 thin film coating. It was found the obtained TiO2 film could be fabricated well with high thermal stability. The mechanism of the TiO2 thin film deposition in mist CVD methods and the interface between TiO2 and ZnO nanorods were investigated.
P‐113: Improving the Carrier Balance with Hybrid Hole Transporting Layer and Electron Blocking Layer in Quantum Dot Light‐Emitting Diodes
Authors: Dong Dan , Lian Lu , Feng Dongxu , Wang Han , He Gufeng
Published: June 2018

High performance quantum dot light‐emitting diodes have been demonstrated by doping small molecule with low highest occupied molecular orbital (HOMO) level into polymer as a hybrid hole transporting layer (HTL). The hybrid HTL facilitates hole injection and hence improves the carrier balance. The color purity of the device is further enhanced by slowing down the electron transporting with an electron blocking layer. Consequently, the optimized device obtains a maximum current efficiency of 22.8 cd/A, meaning a 35.7% improvement compared with the original one.
P‐114: Green Quantum Dot Light‐Emitting Diodes with High Color Purity and Their Efficiency Improvement
Authors: Kim Jaeyun , Kwak Jeonghun
Published: June 2018

We report green quantum dot light‐emitting diodes (QLEDs) exhibiting high color purity based on their narrow spectral emission of which the full‐width at half‐maximum is 22 nm. The Commission Internationale de l'Éclairage color coordinates of the devices are highly close to the ultra‐high definition specification (BT.2020) because of their narrow emission bandwidth. The device efficiency is also improved drastically by adopting alkali metal doped ZnO nanoparticles (NPs) as an electron transport layer. The doped ZnO NPs reduces the electron injection from a cathode to QDs and improves the electron‐hole balance. Consequently, the maximum efficiency of the QLEDs is approximately 4 times higher than that without doped ZnO NPs.
P‐116: Field Assisted Unidirectional Alignment of Quantum‐Rods with Polarized Light Emission
Authors: Kaur Sandeep , Murali G. , Manda Ramesh , Kim Yulki , Lee Sung Guk , Heo Yun Jin , Lee Seung Hee
Published: June 2018

Owing to anisotropic light emission, an aligned quantum‐rods (QRs) array paired with LCD backlight offers a viable option to achieve the light polarization and enhance the color gamut. Herein, we present a facile approach for the fabrication of a functional film with unidirectional ordered QRs by utilizing solvent‐based UV‐curable reactive‐mesogen and an in‐plane electric field. The film exhibits partially polarized light with polarization ratio value of 0.42, which was mainly attributed to the QRs alignment in the electrode gap area of IPS substrate.
P‐120: Development of Bottom Emission Display with Excellent Image Visibility under Bright Ambient Light using Quantum Dot Color Filter and In‐Cell Polarizer
Authors: Koma Norio , Hashizume Masaharu , Kato Hiroki , Ishinabe Takahiro , Fujikake Hideo
Published: June 2018

We report a new display that uses a quantum dot color filter and an in‐cell polarizer with bottom emissive structure. The new display provides high image quality under ambient light. We confirmed the effectiveness of the new display by experiments.
P‐121: Successive and Scalable Synthesis of Highly Stable Cs4PbBr6 Perovskite Microcrystal by Microfluidic System and Their Application in Backlight Display
Authors: Wang Hung-Chia , Bao Zhen , Liu Ru-Shi
Published: June 2018

All Inorganic CsPbX3 (X = I, Br, Cl) perovskite nanocrystal have attracted immense research interest in recent years, due to their high photoluminescence quantum yield (PLQY). These fascinating features of inorganic nanocrystals have been utilized in light emitting diodes (LEDs) device. However, maintaining the high PLQY in the solid state remains a big challenge. Inorganic mesoporous silica encapsulation of NCs has moderate improvements, but it remains an unsolved problem. Robust and air‐stable Cs4PbBr6 microcrystal was another choice in perovskite solid. In this study, we report mass production of Cs4PbBr6 perovskite microcrystal by microfluidic system. To demonstrate the potential application of Cs 4PbBr6 perovskite microcrystal, we fabricated white‐light LEDs based on Cs4PbBr6 and K2SiF6:Mn4+ phosphor. Our white light LED device for backlight display having the NTSC value is 115%.
P‐124: Photo Emissive Nanorods Display
Authors: Zhang Wanlong , Schneider Julian , Srivastava Abhishek K. , Rogach Andrey L. , Chigrinov Vladimir G. , Kwok Hoi Sing
Published: June 2018

In this paper, the composite film of nanorods and liquid crystal polymer, which could offer liquid crystal azimuthal anchoring energy, is introduced as an in‐cell orientation layer for liquid crystal displays. The emission patterns from NRs pixels on the fabricated liquid crystal panel are controlled by only 5 Volts.
P‐125: Monochromatic Active Matrix Micro‐LED Micro‐displays with >5,000 dpi Pixel Density Fabricated using Monolithic Hybrid Integration Process
Authors: Ou Fang , Chong Wing Cheung , Xu Qunchao , Chen Yijing , Li Qiming , Zhang Lei
Published: June 2018

We report the realization of monochromatic red, green and blue active matrix micro‐LED micro‐displays with >5,000 dpi pixel density. The micro‐displays were fabricated using a wafer‐scale monolithic hybrid integration process which shows feasibility and advantages for the mass production. The micro‐displays demonstrated are of great potentials in augmented reality applications.
P‐126: Thin Film Stress Optimization for Bending Resistance Improvement of Flexible AMOLED Display
Authors: Zhang Huijuan , Li Xiaolong , Li Liangjian , Li Dong , Li Zhao , Liu Zheng , Kao Shanchen , Wang Dawei
Published: June 2018

In order to improve the bending resistant of flexible AMOLED display, the stress of thin film should be well researched. In this paper, we analysis the defect of transversal line, which was very serious after module bending, metal crack was found in the process of TFT backplane. We solved the issue of metal crack by adjusting the stress of the backplane compound film. The bending resistant of the flexible screen was improved finally. We successfully fabricated a 5.46inch QHD flexible AMOLED display which passed one hundred thousand times bending test in a bending radius of 5mm.
P‐127: Dual‐Gate Self‐Aligned IGZO TFTs Monolithically Integrated with High‐Temperature Bottom Moisture Barrier for Flexible AMOLED
Authors: Kronemeijer Auke Jisk , Akkerman Hylke , van der Steen Jan-Laurens , Steudel Soeren , Pendyala Raghu , Panditha Pradeep , Bel Thijs , van Diesen Karin , de Haas Gerard , Maas Joris , de Riet Joris , Rovers Madelon , Verbeek Roy , Nag Manoj , Verschueren Lynn , Genoe Jan , Dehaene Wim , Lu Ya-Ju , Chiang Shin-Chuan , Huang Yen-Yu , Yeh Ming-Hua , Gelinck Gerwin
Published: June 2018

We present a 350°C self‐aligned dual‐gate a‐IGZO backplane technology with a monolithically integrated multi‐layer high‐temperature thin‐film barrier for flexible AMOLED. Thin‐film barrier properties and TFT technology are optimized on 320 x 352mm substrates, and demonstrated in a flexible QQVGA 100 ppi AMOLED display prototype.
P‐129: Planarization Effect on Electrical Performances of Organic Thin Film Transistors
Authors: Wu An-Ju , Hsu Shih-Hua , Chen Wei-Han , Liu Kuan-Hsien , Tsai Chia-Hung , Tu Chun-Hao , Liu Chu-Yu , Chiang Ming-Feng , Lin Yu-Chieh
Published: June 2018

A planarization layer for organic thin film transistors serves not only as a smooth surface for device build‐up, other benefits include better wetting behaviors of organic semiconductor and auxiliary materials, stronger inter‐layer adhesions, and provide stable electrical performances of OTFTs. A uniform boundary between organic semiconductor and upper plane of the substrate plays a key role in achieving reliable device performances. The critical properties of the interface affect coating condition and film quality of organic semiconductor, which dominate the general transfer characteristics. We reported the planarization layer influenced phenomenon of OTFTs and the improved reliability performances for right selection of planarization materials.
P‐132: Mechanical Deformation‐Aware TFT Modeling for Highly Flexible Wearable Electronics Design
Authors: Mijalković Slobodan , Nejim Ahmed , Barquinha Pedro , Scott Ian
Published: June 2018

A modeling methodology and design tools for mechanical deformation‐aware design of highly flexible wearable electronics are presented. A new 3D TCAD meshing tool is developed to explore the effects of bending on electrical characteristics of IGZO TFTs for e‐fiber applications. A generic meta‐modeling approach to extend the standard SPICE TFT models for mechanical deformation‐aware circuit simulation and design is proposed.
P‐138: A High Sensitive Resistive Pressure Sensor with NH4HCO3‐induced Porous Structure Active Layer
Authors: Pan Jin , Liu Shiyu , Yang Yicheng , Lu Jiangang
Published: June 2018

A facile approach to achieve high sensitive piezoresistive pressure sensor is proposed. By introducing NH4HCO3 to produce porous structures in the PSR‐layer (Pressure sensor rubber), sensor shows high flexibility and elasticity. The resistance increases with external stress. Sensitivity reaches 0.8kPa‐1 under the pressure of 0–25kPa, with high linearity and stability.
50‐4: Novel Large‐size Process for Organic Thin‐Film Transistor Fabrication
Authors: Tsai Chia-Hung , Liu Kuan-Hsien , Wu An-Ju , Hsu Shih-Hua , Chen Wei-Han , Tu Chun-Hao , Liu Chu-Yu , Chiang Ming-Feng , Lin Yu-Chieh
Published: June 2018

A p‐type organic semiconductor with intrinsic high intra‐molecular orientation arrangement and uniformly were covered on substrate using spin coating. Combined with a vertical phase separation of blend small molecule and semiconducting binder is suitable for large‐size substrate uniform‐coating process. The fully solution processable organic thin‐film transistors (OTFTs) with silver/gold free fabrication process is our target approach to realize low‐cost manufacturing and easy design novel OTFTs. The device shows stable electrical bias, and thermal‐assisted carrier transportation behavior.
49‐4: A Low‐power Reflective LCD System with Adaptive Compression Algorithm of Grey Scale
Authors: Long Feng , Zhang Yu , He Zongze , Sun Lingyu , Chen Xiuyun , Dkyoon  , Chen Ming , Li Shuo , Yang Jianguang , Zhang Liang , Lu Zhenghua , Chen Yuxuan , Xiao Pin , Liang Fei , Hou Tingxiu , Fang Liyu , Du Jingjun
Published: June 2018

A 1.28‐inch 6‐bit color low‐power reflective LCD prototype has been developed by using low refresh rate system and memory‐type pixel (MTP) structure. As there is an intrinsic problem for the MTP structure that large flat areas, and loss of detail become noticeable when original 8‐bit RGB color is converted to 2‐bit RGB color. An adaptive compression algorithm of grey scale has been developed to minimize the image deterioration, which enables to select an appropriate parameter according to the types of images and the position on the screen. By a specific function of RGB point‐to‐point gray‐scale transformation, the picture shows better effect than the traditional processing method. The simulation and experimental results verify the effectiveness of the adaptive compression algorithm.
51‐3: High‐birefringence Liquid Crystal for Phase‐only Spatial Light Modulators
Authors: Chen Ran , Huang Yuge , Li Jian , Hu Minggang , Li Juanli , Wu Shin-Tson , An Zhongwei
Published: June 2018

We report a high birefringence and high resistivity LC mixture for augmented reality and virtual reality displays. When employed in a phase‐only Liquid‐Crystal‐on‐Silicon, the measured average phase‐to‐phase response time is 2.87 ms, while keeping a 2π phase change and 5V operation voltage, which enables 240 Hz operation without using complicated overdrive and undershoot circuitries.
49‐2: Hierarchical Logo Detection and Image Processing Algorithm for Preventing OLED Image Sticking
Authors: Oh Euiyeol , Lee Jeisung , Oh Jinyoung , Park JiHoon , Baek JongSang , Choe Yoonsik
Published: June 2018

The OLED display has been known to have excellent display characteristics such as high response speed, wide viewing angle and color rendering capabilities. However, OLED devices require sustained efforts to improve the OLED lifetime due to a characteristic that the luminance decreases according to elapsed time. In this paper, we proposed hierarchical logo detection and brightness control method to prevent image sticking on OLED TV. We have experimented with this method in FPGA and We prove that the proposed algorithm can increase the lifetime of OLED TV.
51‐5: Late-News Paper: Fast Motion Picture Response Color Filter LCOS for Wearable Applications
Authors: Li Yuet-Wing , Chen Wen-Hsu , Lin Chi-Wen , Fan-Chiang Kuan-Hsu , Kuo Hung-Chien , Tsai Hsien-Chang
Published: June 2018

The display for augmented reality (AR) applications has to update image promptly in order to cope with the user's head movement or any environment change. It makes image blur become noticeable if the motion picture response time of the AR display is longer than 1.5ms. We propose an image blur free Color Filter LCOS (CFLCOS) which equipped with 1.9ms liquid crystal response time; analog frame buffer and 480fps refreshing rate. It is found that the MPRT of such device can be as fast as <1.5ms.
53‐1: Distinguished Student Paper: A Novel Low Power Gate Driver Architecture for Large 8K 120Hz LCD Display Employing IGZO Technology
Authors: Iwase Yasuaki , Tagawa Akira , Takeuchi Yohei , Watanabe Takuya , Horiuchi Satoshi , Asai Yoshihiro , Yamamoto Kaoru , Daitoh Tohru , Matsuo Takuya
Published: June 2018

A novel low power gate driver architecture was developed for large 8K 120Hz LCD panel. For this application, not only high speed driving but also low power consumption is required. We employed a high mobility IGZO, dual VGL level driving method and gate driver circuit driven by DC supply. The simulation results show that our proposals meet 8K 120Hz driving requirements. Also, we have fabricated a prototype panel and confirmed high speed driving and low power consumption.
53‐3: Distinguished Paper: IGZO‐TFT Technology for Large‐screen 8K Display
Authors: Hara Yoshihito , Kikuchi Tetsuo , Kitagawa Hideki , Morinaga Junichi , Ohgami Hiroyuki , Imai Hajime , Daitoh Tohru , Matsuo Takuya
Published: June 2018

We succeeded in G8 factory for mass production of IGZO‐TFT for the first time in the world. The initial TFT process was an ES type TFT, but now we are mass producing CE type TFTs. And, its application range is smartphones, tablets, PCs, monitors, TV and so on. In particular, due to recent demands for high resolution and narrow frame, our IGZO display has been advanced in technology development with GIP (Gate driver In Panel). In this paper, we report development combining low resistance technology and the latest IGZO‐TFT for large‐screen 8K display.
P‐142: High Performance Optically Isotropic Liquid Crystal Display using Twisted Liquid Crystals for Flexible LCDs
Authors: Song Seong Min , Pagidi Srinivas , Yoo Hyesun , Lee Chang Suk , Lim Young Jin , Manda Ramesh , Seo Eo Jin , Kim Tae Hyung , Lee Gi-Dong , Lee Seung Hee
Published: June 2018

Optically isotropic polymer/liquid crystal (OILC) composite film in which nano‐sized liquid crystal droplets are embedded in a polymer matrix with minimal scattering is proposed for flexible LCDs with high contrast ratio, fast response time and wide‐viewing‐angle. Feeble light scattering in conventional OILC is overcome utilizing cholesteric LC but limiting its pitch larger than LC droplets, giving rise to higher contrast ratio. In this paper, we reports on electro‐optic studies of OILC cells having various pitch sizes, exhibiting an outstanding dark state and improved transmittance.
P‐146: Effect of Stretching Condition on the In‐plane and Out‐of‐Plane Birefringence of Negative A‐plate Polystyrene Film
Authors: Ryu Hee Jung , Lee Ji-Hoon
Published: June 2018

We have described the relationship between the stretching conditions and the in‐plane birefringence and NZ coefficient of the negative A‐plate film. As the stretching ratio and the stretching speed were respectively increased of the stretching temperature was decreased, the in‐plane birefringence and the NZ coefficient were increased.
P‐148: A Continuous Variable Lens System to Address the Accommodation Problem in VR and 3D Displays
Authors: Jamali Afsoon , Yousefzadeh Comrun , McGinty Colin , Bryant Douglas , Bos Philip
Published: June 2018

The focus cue is a continuing concern within the field of Virtual Reality (VR), Augmented Reality (AR) and 3D displays. Although liquid crystal (LC) based lens is an excellent candidate for tunability, a major problem with VR/3D application is a need for large aperture not inhibiting the field of view, but that also maintains a reasonable switching time. In this paper we discuss results with two systems that can be used for such application. We present the result of user preference for an approach using a Fresnel lens structure, and propose a second design that is a hybrid system comprised of refractive Fresnel and Pancharatnam‐Berry LC lenses. Our study presents a compact, large aperture, fast and tunable optic that can be used in numerous applications including VR/3D systems.
P‐150: Influence of Illumination on Vcom Distortion
Authors: Zhuang Zihua , Yang Xinyuan , Chen Xi , Zhang Honglin , Yun Xiangnan , Wu Hongjiang , Yuan Jianfeng , Lin Hongtao
Published: June 2018

We investigated the influence of illumination on Vcom distortion which is the main cause of line image sticking and analyzed the mechanism of backlight illumination on Vcom distortion by using MIS structure. Results showed that the amplitude of Vcom distortion increased with elevating the backlight illumination and finally reached its maximum value. Moreover, UV‐irradiation on the semiconductor layer was proved to be an effective method to improve Vcom distortion.
59‐2: Invited Paper: Ultra‐Fine Pitch Thin‐Film Micro LED Display for Indoor Applications
Authors: Lin Chien-Chung , Fang Yen-Hsiang , Kao Ming-Jer , Huang Ping-Kai , Chang Feng-Pin , Yang Li-Chang , Wu Chih-I
Published: June 2018

In this paper, we will review the development of micro‐LED in ITRI, and demonstrate the latest results of the full‐color, and high resolution micro display with fine pitch of micro‐LED arrays. The devices can be mass‐transferred onto different substrates, such as printed circuit boards or glass plates. The micro‐LED performance is measured and its reliability under temperature cycle and high current condition show great stability in both forward voltage and output power.
54‐2: Flexible a‐IGZO TFT for Large Sized OLED TV
Authors: Yoo Won Beom , Ha Chanki , Kwon JinWoo , Jeon JaeWan , Lee HeungJo , Kwon SeYeoul , Park WeonSeo , Kim BongChul , Shin WooSup , Kim JongWoo
Published: June 2018

Flexible a‐IGZO TFTs have been developed on transparent PI substrate with multi‐buffer for large sized OLED TV. It was carefully considered and designed to meet the electrical properties of oxide TFTs and specific needs for flexible display. We achieved high performance of device on PI substrate, which shows 0.34 V of threshold voltage, 10.25 cm2/Vs of field effect mobility, and 0.22 V/dec of sub‐threshold swing on average. The electrical and mechanical reliability of PI‐based oxide TFTs were verified by the results of Bias Temperature Stability (BTS) and bending test, showing no significant device degradation. This work should contribute to commercialize large sized flexible OLED TV.
54‐3: Distinguished Paper: High Temperature Thin‐Film Barriers for Foldable AMOLED Displays
Authors: Akkerman Hylke , Pendyala Raghu , Panditha Pradeep , Salem Ahmed , Shen Jie , van de Weijer Peter , Bouten Piet , de Winter Suzanne , van Diesen-Tempelaars Karin , de Haas Gerard , Steudel Soeren , Huang Ching-Yu , Lai Ming-Hsiang , Huang Yen-Yu , Yeh Ming-Hua , Kronemeijer Auke Jisk , Poodt Paul , Gelinck Gerwin
Published: June 2018

We present a thin‐film dual‐layer bottom barrier on PI that is compatible with 350°C backplane processing for OLED displays. We demonstrate OLEDs that survive bending over 0.5 mm radius for 10.000x. Furthermore, we show compatibility of the bottom barrier with the backplane process by fabricating AMOLED displays on GEN1‐sized substrates.
55‐2: Invited Paper: Volume Optimized and Mirror‐less Holographic Waveguide Augmented Reality Head‐up Display
Authors: Richter Pablo , von Spiegel Wolff , Waldern Jonathan
Published: June 2018

Trust in highly automated driving increased by intuitive dialogue between the driver and driver assistance systems. Predestined are augmented reality head‐up displays (AR HUD) able to display virtual images in large projection distances in front of the driver in context to the environment. A volume optimized mirror‐less AR HUD solution, based on a disruptive holographic waveguide technology with first results from a first real demonstrator.
P‐156: Flicker Effect Depending on the Density of Charge Impurities in the Cell
Authors: Park Min Soo , Youn Hyung-Jin , Lee Cheol-Soo , Yoon Sang-Ho
Published: June 2018

The concentration of the impurity is higher due to the small device with high resolution. The increased concentration of impurities causes the flicker. In this paper, we observed the flicker effect when charge impurities were generated in the cell and confirmed the flicker effect depending on frequency.
P‐163: Novel Design and Study of Anti‐crack Dam for CVD Shadow Free
Authors: Ni Jingkai , Wang Wei , Sun Zhongyuan , Zhang Shizheng , Wang Xiaofen , Yue Han , Xue Jinxiang , Zhou Xiang , Sui Kai , Liu Wenqi , Dong Chao
Published: June 2018

OLED TFE inorganic film owns unwished shadow that enlarges border, cracks appear in the same layer. To retract inward TFE border and eliminate the damage of crack, we designed novel anti‐crack dam located in panel bezel. With the help of its blocking effect, inorganic film crack can be eliminated.
48‐3: Distinguished Student Paper: Ambient‐Light‐Adaptive Image Quality Enhancement for Full‐Color E‐Paper Displays Using Saturation‐Based Tone‐Mapping Method
Authors: Chen Yi-Wen , Qin Zong , Lin Fang-Cheng , Shieh Han-Ping D. , Huang Yi-Pai
Published: June 2018

For full‐color e‐paper displays that have a small color gamut, we improve distorted image tones in high‐saturation regions using saturation‐based tone‐mapping curves derived from measured chroma‐saturation characteristic. The improvements are experimentally verified via several test charts and natural images. More important, the method can adapt to varying ambient light.
46‐4: 513‐ppi Hybrid Display with Stacked Transistors
Authors: Mori Hidenori , Shima Yukinori , Hosaka Yasuharu , Okazaki Kenichi , Kusunoki Koji , Shishido Hideaki , Hatsumi Ryo , Yoshitomi Shuhei , Yamazaki Shunpei
Published: June 2018

A process for stacking two layers of transistors is used to form a high‐resolution hybrid display with improved reliability of an organic light‐emitting diode. Sufficient visibility and low power consumption are achieved by changing the display mode in accordance with ambient luminance.
45‐3: Invited Paper: Enabling the Next Era of Display Technologies by Micro LED MOCVD Processing
Authors: Beckers Arthur , Fahle Dirk , Mauder Christof , Kruecken Thomas , Boyd Adam R. , Heuken Michael
Published: June 2018

Conventional Display Technologies are being challenged by the emergence of Micro LED Display Technology. AIXTRON identifies the increased MOCVD requirements Micro LED applications are bringing and how these can be addressed. We present progress on improvements to MOCVD processing of red, green and blue Micro LEDs based on Planetary technology.
44‐2: Invited Paper: Fast Response Time Advanced High Performance In‐plane Switching (AH‐IPS) Mode for High Resolution Application
Authors: Jo Soo In , Yoon Sang-Soon , Park Seung Ryull , Lee Joun-Ho , Jun Myung-Chul , Kang In-Byeong
Published: June 2018

We propose a fast response AH‐IPS LCD panel suitable for high resolution and low latency application. By developing a new LC and electrode configuration, we could obtain a fast response time without over driving and BLU scanning scheme (GTGavg /GTGmax = 4.2/6.5 msec).
P‐175: High Triplet Energy Exciplex Forming Hole Type Host for High Performance in Deep‐blue Phosphorescent Organic Light‐emitting Diodes
Authors: Lee Ha Lim , Song Wook , Lee Jun Yeob
Published: June 2018

We designed and synthesized hole type host, N,N‐bis(4‐(tert‐butyl)phenyl)‐3,5‐bis(3,6‐di‐tert‐butyl‐9H‐carbazol‐9‐yl)aniline (t‐DCDPA) to use as an exciplex host with 2,8‐bis(4,6‐diphenyl‐1,3,5‐triazin‐2‐yl)dibenzo[b,d]furan (DBFTrz) electron type host material in deep‐blue phosphorescent organic light‐emitting diodes (PhOLEDs). To evaluate ability of t‐DCDPA, other hole type host materials were used as reference materials, which are tris(4‐(9H‐carbazol‐9‐yl)phenyl)amine (TCTA) and 3,5‐di(9H‐carbazol‐9‐yl)‐N,N‐diphenylaniline (DCDPA). Three pairs showed red‐shifted emission compared to that of each host emission, which means that they formed exciplex. t‐DCDPA:DBFTrz pair showed triplet energy of 2.94 eV, which is similar to that of DCDPA:DBFTrz pair (2.95 eV) and higher than TCTA:DBFTrz (2.83 eV). In deep‐blue PhOLEDs, t‐DCDPA:DBFTrz host pair showed the highest performance among three pairs, which proved that the newly synthesized host is efficient in deep‐blue PhOLEDs.
43‐4: Self‐Shading with Optically‐ and Thermally‐Switchable Liquid Crystals
Authors: Oh Seung-Won , kim Sang-Hyeok , Baek Jong-Min , Yoon Tae-Hoon
Published: June 2018

Self‐shading by optical or thermal switching between transparent and opaque states is achieved by liquid crystals doped with push‐pull azobenzene and can be used for energy‐saving smart windows. The self‐shading light shutter is transparent during cool weather or under weak sunlight, which could save the energy used for heating and lighting, and can be switched from the transparent to opaque states during warm weather or under strong sunlight, saving energy used for cooling.
P‐176: Distinquished Poster Paper: The Suppression of Viewing Angle Dependence of Top Emission Organic Light Emitting Diodes Having Strong Microcavity Characteristics by Applying Concave Patterned Anode
Authors: Kim Nam Su , Jung Seon Hyeak , Kim Hyung Suk , Suh Min Chul
Published: June 2018

In order to obtain the stable viewing angle characteristics of top emission organic light emitting diodes (TEOLEDs) having strong microcavity characteristics, we fabricated nano‐porous film on the glass substrate before depositing highly reflective anode. And then, we could obtain the concave patterned anode by depositing anode on the nano‐porous film and fabricated TEOLED composed of concave patterned layers. From this approach, we could successfully obtain not only the stable color shift and luminance distribution with viewing angle but also high efficiency caused by uneven morphology. In addition, we found that the driving voltage of TEOLED could be reduced due to increased surface area effect of the concave patterned anode, so that the power efficiency was enhanced by about 15% in comparison with reference device.
P‐177: Engineering Host Materials for High Efficiency and Long Operational Lifetime in Blue Phosphorescent Organic Light‐emitting Diodes
Authors: Byeon Sung Yong , Han Si Hyun , Lee Jun Yeob
Published: June 2018

Two host materials for blue phosphorescent organic light emitting diodes (PhOLEDs) were developed to exhibit high external quantum efficiency (EQE) and long device lifetime, By substituting strong electron deficient CN moiety in different positions, the highest occupied molecular orbital and the lowest unoccupied molecular orbital energy levels were controlled. Although the CN substitution position is different between the two hosts, both of the host materials showed high triplet energy of 2.98 eV. The CN modification in dibenzothiophene was effective to improve electron injection and high EQE. The new host materials also showed long device operational lifetime when CN modified phenylimidazole ligand based blue phosphorescent emitter was used as a blue triplet emitter.
P‐178: Synthesis of Reverse Intersystem Crossing Facilitating Host Material for High Efficiency in Red Thermally Activated Delayed Fluorescent Organic Light‐emitting Diodes
Authors: Kim Ji Han , Lee Dong Ryun , Han Si Hyun , Lee Jun Yeob
Published: June 2018

In this study, we introduced a reverse intersystem crossing activating host material to obtain high efficiency in red thermally activated delayed fluorescent organic light‐emitting diodes. The host material was composed of phenylcarbazole and pyridofuropyridine moieties. The 3‐(9‐phenyl‐9H‐carbazol‐3‐yl)furo[2,3‐b:5,4‐b′]dipyridine (3PCz‐PFP) host material was synthesized by introducing pyridofuropyridine at 3‐ position of the 9‐phenylcarbazole. We were able to obtain a high external quantum efficiency of 24.0% by doping red‐emitting thermally activated delayed emitter in 3PCz‐PFP host material. This efficiency is one of the highest efficiencies in red thermally activated delayed fluorescent devices. The high quantum efficiency of the red thermally activated delayed fluorescent devices was achieved due to improved reverse intersystem crossing rate and ambipolar charge transport character of the host material.
P‐180: Luminance Enhancement of the OLED by Direct Emission of Circular Polarization
Authors: Lee Dong-Myoung , Jung Jin-Hyung , Kang Byung-Jun , Choi Yoonseuk , Yu Chang-Jae , Kim Jae-Hoon
Published: June 2018

We report an enhancement of the OLED luminance by using a circularly polarized electroluminescence (CPEL). The CPEL was directly achieved in the conjugate polymer twisted by doping a chiral agent to an emitting material. Under circular polarizer for antireflection, the luminance efficiency was enhanced by 30%.
P‐182: Actual Interpretation of Concentration Quenching Effect on Thermally Activated Delayed Fluorescence in a Solid Film
Authors: Kim Hyung Suk , Park So-Ra , Suh Min Chul
Published: June 2018

Concentration quenching behavior was rigorously interpreted by the three level model (Optical model). This work reveals that solid‐state self‐quenching process of thermally activated delayed fluorescence (TADF) molecule follows the Dexter energy transfer. And, non‐radiative triplet decay could be critical to estimate exact tunneling distance (LET).
43‐3: Distinquished Paper: Brilliant Cosmetic Film for Ambient Displays, with Cholesteric Liquid Crystal
Authors: Ishiguro Makoto , Ichihara Nobuhiko , Yanai Yujiro , Nagai Michio , Takada Katsuyuki , Suga Yoichi , Ito Yoji
Published: June 2018

A brilliant cosmetic film with polymerized cholesteric material (PCM) has been developed. The film features a variety of colors by helical pitch gradients, diffusive texture, and arbitrary color patterns. It hides the display when turned off, and transmits display images when turned on. We believe it could change the display in the Off‐state from the conventional black wall to specially designed decorations. In addition, they can be applied to hidden sensors.
40‐2: Invited Paper: Microdisplays for Augmented and Virtual Reality
Authors: Haas Gunther
Published: June 2018

We will present an overview of the requirements of microdisplay based HMDs for Augmented Reality (AR) and for Virtual Reality (VR). Based on this, we will compare existing and upcoming microdisplay technologies with respect to their specific advantages and disadvantages for AR and VR applications. A second part is dedicated to present recent advances in OLED based microdisplays for AR and VR, namely with respect to high brightness, very high resolution, and ultra‐low power consumption.
42‐1: A Promising Strategy of Low‐Power Circuit Design for Integrated Display Driver Using Charge‐Trap Memory and Oxide Thin Film Transistors
Authors: Byun Chun-Won , Kim Yeo-Myeong , Yu Byung-Chang , Yang Jong-Heon , Hwang Chi-Sun , Kim So-Jung , Lee Seung-Hyuck , Lee Seung-Woo , Cho Nam Sung , Lee Jeong-IK , Yoon Sung-Min
Published: June 2018

We propose the design concept for dramatically reducing the power consumption of integrated circuit using TFTs, which is named as Read‐out Modulation (RoM). In the RoM scheme, the read‐out voltages applied to the charge‐trap memory TFTs are intentionally modulated to replace the clocks of shift registers to minimize the clocking power consumption. The test circuit is fabricated and the proposed RoM is successfully verified with the frequency characteristics.
42‐3: Invited Paper: A 4Gbps/lane Column Driver for 8K UHD 120Hz Display Larger than 85‐inches
Authors: Lim Hyun-Wook , Baek Dong-Hoon , Lee Tae-Ho , Jin Eun-Young , Kim Kyoung-Ho , Kim Jin-Ho , Choi Young-Min , Kim Bup-Hee , Song Jun-Ho , Yoo Seong-Jong , Kim Tae-Yong , Cho Hyoung-Sik , Lee Jae-Youl , Kang Im-Soo
Published: June 2018

A 4Gbps/lane column driver is implemented in 1.8V 0.13‐μm high‐voltage CMOS process for 8K UHD 120Hz displays. The proposed column driver presents auto‐calibrated 4Gbps receiver per lane to cover up to 8K UHD 120Hz 10bit display with two lanes and can drive 8K UHD panel larger than 85‐inches. Measured results show that a 4Gbps/lane column driver with auto equalizer calibration technique to adaptively compensate wide variation of channel length, power supply and temperature simultaneously.
P‐203: Late‐News Poster: Novel Techniques for Highly Stable Luminescent Perovskite Halide Quantum Dots
Authors: Sinatra Lutfan , Lutfullin Marat , Abbas Abdullah Saud , Pan Jun , Bakr Osman M.
Published: June 2018

Perovskite quantum dots (QDs) are promising materials for display application due to their high optical properties, such as: high PLQY, narrow FWHM and tunable emission wavelengths. The present work shows the further progress in enhancement of perovskite QDs stability, resistance to photodegradation and PL quenching at high temperatures.
P‐207: Late‐News Poster: Efficient Emitter Aggregation Management Using High‐Entropy Non‐crystallizable Hosts
Authors: Chakraborty Rajarshi , Molaire Mike F. , Weiss David S. , Yu Tianhao , Rothberg Lewis J.
Published: June 2018

Molecular Glasses Inc. has developed a new class of high‐entropy non‐crystallizable OLED hosts that can be deposited by both vacuum/thermal evaporation and solution‐based processes such as inkjet printing. Benchmark testing demonstrated a 4‐15 times improvement in OLED lifetime using these hosts instead of conventional host 3, 3‐di(9H‐carbazol‐9‐yl) biphenyl (mCBP). Time resolved photoemission spectroscopy on a yellow phosphorescent emitter in a non‐crystallizable host – OLEDIQTM HT‐1700 vs. standard mCBP host shows that aggregation quenching is higher in mCBP. Triplet‐triplet annihilation (TTA) in these hosts is also explored.
P‐211: Late‐News Poster: A 5.5‐inch FHD IGZO in Cell Touch LCD with High SNR
Authors: Kuo Ping-Sheng , Su Chih-Yu , Lee Chang -Yeh , Liu Hang-Lung , Huang Jhih-Jie , Chu Shu-Wei , Wu Shen-Yu , Li Yuanhang , Ruan Sangsang , Chen Yuhuai , Song Shuang , Liu Shaofan , Li Bozi , Tseng Chih-Yuan
Published: June 2018

We developed a 5.5” IGZO (Indium‐Gallium‐Zinc‐Oxide) LCD display with in cell touch of self‐capacitive type. The photoalignment instead of traditional rubbing treatment of the LCD substrate was adopted. Middle com structure with organical planarizaion layer possesses high display quality and excellent touch performance due to fewer couple between gate/data and pixel/Vcom.
P‐212: Late‐News Poster: Flexible Cover Window for Foldable Display
Authors: Jeong Yong-Cheol
Published: June 2018

We present foldable cover lens of multiple structures based on the anti‐scratch optical film. We studied mechanical properties of surface hardness of flexible cover window by a nanoindentation method. Furthermore, folding reliability was also investigated by repeating normal flat state and bended state of cover window sample.
P‐214: Late‐News Poster: Stretchable Active‐Matrix Light‐Emitting Diode Array Using Printed Electric Components on Plastic and Elastomer Hybrid Substrate
Authors: Yoon Jaeyoung , Joo Yunsik , Lee Byeongmoon , Oh Eunho , Cho Hyun , Hong Yongtaek
Published: June 2018

We present stretchable active‐matrix light‐emitting diode (AMLED) array using printed components, such as stretchable electrodes, electrochemical transistor, contact pads, on plastic and elastomer hybrid substrate. Inkjet‐printing and facile chip‐bonding methods were used to implement stretchable AMLED array that stably operates under biaxial strain of 20%
3‐5: RGB Superluminescent Diodes for AR Micro‐Displays
Authors: Rossetti Marco , Castiglia Antonino , Malinverni Marco , Mounir Christian , Matuschek Nicolai , Duelk Marcus , Vélez Christian
Published: June 2018

Red, green and blue superluminescent LEDs (SLEDs) offer benefits like high color gamut, high efficiency, high directionality and low temporal coherence in the field of displays for augmented reality. This paper briefly reviews the history of the topic to provide a context in which to report recent advances.
4‐3: Solution Synthesis of High‐Quality Indium‐Nitride Quantum Dots
Authors: Nagakubo Junki , Hirakawa Masaaki , Sawada Takahiro , Nishihashi Tsutomu , Horita Kazumasa , Murakami Hirohiko
Published: June 2018

Group III‐nitride nanocrystals are promising candidates for lighting applications. However, development of their colloidal quantum dots (QDs) has not progressed because of issues with the synthesis of indium nitride (InN) nanoparticles, such as the long reaction time and the generation of indium metal as a by‐product. Here, we propose a new synthetic method that can solve almost all of the above problems and improve the quality of InN nanocrystals. In addition, we demonstrate that Ga—In—N QDs and Zn—In—N QDs synthesized using the proposed method exhibit photoluminescence.
5‐3: OLED Display Device Mounted with a Novel External Compensating Circuit
Authors: Toyotaka Kouhei , Takahashi Kei , Yamamoto Roh , Kawashima Susumu , Nakamura Daiki , Sugisawa Nozomu , Dobashi Masayoshi , Misawa Chieko , Nakada Masataka , Yamazaki Shunpei
Published: June 2018

A prototype of an external compensating circuit including an integrator is fabricated for an organic light‐emitting diode display. This integrator includes an amplifier with two differential pairs to improve the accuracy of measuring current for external compensation for variations in transistor characteristics.
10‐4: Stereoscopic / Light Field Hybrid Head‐mounted Display by Using Time‐multiplexing Method
Authors: Wang Chun-Ping , Chou Ping-Yen , Yee Eng-Sik , Lee Hsin-Hsueh , Shu Hsu-Sheng , Wang Tsang-Hong , Shih Li-Wei , Lih Jiin-Jou , Wu Jui-Yi , Hsieh Po-Yuan , Huang Yi-Pai
Published: June 2018

Stereoscopic / Light Field Hybrid Head‐mounted Display was proposed to avoid accommodation — convergence conflict and improve the resolution of light field image. This new system generate images in LF and stereoscopic mode, further producing hybrid images by the visual persistence of human eyes. To build a mechanism for the time‐multiplexing of the polarized light, we designed and fabricated a micro‐lens array with the liquid crystal material. Specifically, with the function of TN cell and LC MLA, Hybrid HMD could time‐multiplex two images in flicker‐free frame rate. In our results, the resolution of hybrid image can be significantly enhanced from 5.5 ppd to 10 ppd in horizontal direction and 6.2 ppd to 15.9 ppd in vertical direction.
11‐5: Late-News Paper: Quantum Rods — Smart Choice for future Display Generations
Authors: Niehaus Jan
Published: June 2018

Hereby we present a resin consisting of high quality CdSe/CdS nanorods emitting in red and green and UV curable monomers. The final compound has high quantum yields and long time stability without further barrier layers. A method for aligning the rods to achieve a polarized emitter will also be shown.
12‐2: Development of Top‐Gate Oxide TFTs for Plastic‐Film LCDs
Authors: Yamaguchi Yohei , Watabe Kazufumi , Kawanago Hiroshi , Suzumura Isao
Published: June 2018

A thin‐film‐transistor (TFT) technology for plastic‐film liquid crystal displays (LCDs) was developed herein. Top‐gate oxide TFTs with channel lengths L = 2 and 3 μm were fabricated on a transparent polyimide layer at approximately <300 °C using Generation 4.5 mother glass. The desirable performance and reliability of the TFTs were obtained.
12‐3: A 5.5 inch FFS‐LCD Driven by Soluble ‐metal‐oxide and Implementation in Production Line through BCE TFT Structure
Authors: Huang Yen-Yi , Chiang Shin-Chuan , Chen Yu-Hsien , Wu Der-Chun , Tseng Kuo-Hsing , Lin Yi-Hsien , Chang Hsi-Ming , Huang Yen-Yi , Pham Duy-Vu , Su Kuo-Hui , Marinkovic Marko , Weber Dennis , Merkulov Alexey , Anselmann Ralf
Published: June 2018

In this work, solution based metal‐oxide TFT with BCE structure is successfully implemented in TFT‐LCD production line. The well‐known slot‐die coating technology is used to deposit liquid phase semiconductor on Gen4.5 substrates. Finally, a 5.5 inch TFT LCD driven by solution metal oxide TFT was successfully demonstrated.
13‐3: Distinguished Paper:Highly Efficient Deep‐Blue Fluorescent Dopant for Achieving Low‐Power OLED Display Satisfying BT.2020 Chromaticity
Authors: Takita Yusuke , Hashimoto Naoaki , Takeda Kyoko , Nomura Shiho , Uesaka Shogo , Suzuki Tsunenori , Nakashima Harue , Seo Satoshi , Yamazaki Shunpei
Published: June 2018

We have succeeded in developing a stable deep‐blue fluorescent dopant which has a shorter emission wavelength and higher emission efficiency than conventional pyrene‐based dopants. It was revealed that the power consumption of a panel using this novel dopant was estimated to be lower than that of a conventional one.
13‐4: Progress of Highly Efficient Blue TADF Emitter Materials Towards Mass Production
Authors: Baumann Thomas , Budzinsky Matthias
Published: June 2018

OLED panel makers are anxiously waiting for a highly efficient blue emitter for a significant improvement of their panels. In this paper, we present the best high‐efficiency blue OLED to our knowledge with an EQE of 14% and a lifetime LT97 at 700 nits of 10 hours.
14‐3: High Efficiency and Thin Backlight System Using an Advanced Light‐guide with a Multi‐prism Array
Authors: Yagi Shugo , Miyata Hidekazu , Kondo Naoko , Ishida Takeshi
Published: June 2018

Recent trends show that increasing power consumption is one of the serious challenges for high image quality displays. For an LCD module, the backlight accounts for a large proportion of the power consumption. We present a newly developed edge‐lit backlight system utilizing a structured lightguide that offers an effective solution to this challenge with high manufacture yield.
15‐1: Application of the Optical Measurement Methodologies of IEC and ISO Standards to Reflective E‐Paper Displays
Authors: Hertel Dirk
Published: June 2018

This paper explores applying the optical characterization methodologies in IEC 62679 and ISO 9241 to reflective e‐paper displays (EPDs). Measurements of specular and diffuse reflection properties are presented. Simulations and measurements show that EPDs fulfill the ISO requirements for minimum contrast ratio over a wide range of illumination conditions.
15‐4: Quantitative Evaluation of Visual Display Resolution Based on Human Visual Perception
Authors: Choi Kyuha , Seo Sungwon , Min Byungseok
Published: June 2018

Conventional visual resolution metric shows inconsistency with perceived resolution especially for displays with non‐standard sub‐pixel layout. To overcome this inconsistency, this paper proposes a new quantitative metric based on contrast modulation and structure comparison. Experimental results demonstrate that the proposed metric has higher correlation with human visual perception than the conventional metric.
17‐1: A Flat‐panel Holographic‐optical‐element System for Holographic Augmented Reality Display with a Beam Expander
Authors: Zhou Pengcheng , Li Yan , Liu Shuxin , Chen Quanming , Wang Yunfeng , Li Sida , Liu Yueda , Su Yikai
Published: June 2018

We demonstrate a compact design for holographic augmented reality displays using two holographic optical elements (HOEs). In the method, the two HOEs, which are properly set in a flat‐panel form, function as a beam expander and see‐through eyepiece simultaneously. There is no traditional optical element in the system, resulting in a compact and lightweight design. The feasibility of this design is experimentally verified.
22‐3: Distinquished Student Paper: Flexible Quantum Dot Light Emitting Devices for Photomedicine
Authors: Chen Hao , Yeh Tzu-Hung , He Juan , Zhang Caicai , Abbel Robert , Lanzafame Raymond , Stadler Istvan , Celli Jonathan , Liu Shun-Wei , Wu Shin-Tson , Dong Yajie
Published: June 2018

We demonstrate highly efficient quantum dots with narrow spectra and specific peak wavelengths for photomedical applications. Flexible quantum dot light emitting devices with peak EQE of 8.2% and luminance over 20,000 Cd/m2 were achieved which will be employed for treatment of oral cancers or diabetic wounds.
18‐1: Invited Paper: Color Tunable, Flexible, and Efficient Light Emitting Diodes Composed of Metal Halide Perovskites
Authors: Rand Barry P. , Xiao Zhengguo , Zhao Lianfeng , Kerner Ross A.
Published: June 2018

Hybrid organic‐inorganic halide perovskite materials such as methylammonium lead iodide are gaining interest in the thin film optoelectronics community due to their promising optoelectronic properties. We have established a processing paradigm to realize films with roughness on the order of 1 nanometer that consists of nanoscale crystallites, formed by incorporating a bulky organoammonium halide in addition to the stoichiometric 3D perovskite precursors. These bulky ligands passivate the 3D crystal, lead to considerably enhanced luminescence quantum yields, and increase stability. Making light emitting devices from such films result in devices with external quantum efficiency exceeding 10% and which can overcome the otherwise intrinsic brittleness of metal halide perovskite films. Finally, they allow for stabilizing mixed halide (I and Br) stoichiometries such that we can tune emission color from the green to red wavelengths.
18‐3: Polarized Emission from Stretch‐Aligned Perovskite Nanorods‐Polymer Composites with High Stability
Authors: He Juan , Wang Yanan , Chen Hao , Towers Andrew , Yuan Peisen , Jiang Zhang , Zhang Caicai , Chen Jiangshan , Gesquiere Andre J. , Wu Shin-Tson , Dong Yajie
Published: June 2018

We demonstrate low cost, highly luminescent and highly stable CsPbBr3 perovskite nanorods‐polymer composite films which can provide polarized narrow emission after macroscale stretch‐alignment. With polarization ratio 0.23 and narrow linewidth of 18 nm, these films promise to improve the optical efficiency of LCD and help with wide color gamut display.
18‐4: Converting Light Diffusing Polymer Powders into Stable Perovskite‐Based Tunable Downconverters
Authors: Zhang Caicai , He Juan , Chen Hao , Tan Guanjun , Zhou Le , Wu Shin-Tson , Sohn Yongho , Dong Yajie
Published: June 2018

We developed a simple, low‐cost process to convert commercial light diffusing powders into perovskite‐based tunable downconverters with high stability and superior color purity. Uniform illumination with desired color can be achieved with polymer films integrating such down‐converting light diffusers.