Session Index

Display Technology

Display Technology I
Thursday, Dec. 3, 2020  13:15-14:45
Presider: Prof. Li-Yin Chen
Prof. Jin-Jei Wu
Room: 6AB Room 625
Notes:
13:15 - 13:45 Manuscript ID.  0430
Paper No.  2020-THU-S0701-I001
Invited Speaker:
Chung-Chih Wu

Manipulating and Enhancing Optical Performance of OLEDs with Curved and Three-dimensional Structures
Wei-Kai Lee;Zih-Rou Cyue;Po-Jui Chen;Li-Yu Yu;Hoang Yan Lin;Guo-Dong Su;Chung-Chih Wu

Making use of the advance of OLED technologies and characteristics of OLEDs, we explore and discuss the possible uses of curved and three-dimensional structures for manipulating or enhancing optical performance of OLEDs, such as light extraction, emission distribution etc.

 
 
13:45 - 14:00 Manuscript ID.  0571
Paper No.  2020-THU-S0701-O001
Chieh-Hsin Chen
Award Candidate
High brightness and deep-red emission organic light-emitting diodes employing the ITO-free substrate
Chieh-Hsin Chen;Yi-Nan Lin;Chih-Chien Lee;Shun-Wei Liu

In this work, we demonstrated a deep-red emission organic light-emitting diode (OLED), which showed high brightness, low operational voltage, and low-efficiency roll-off. The deep-red emission OLED can be employed in photobiomodulation therapy (PBMT), such as wound healing, hair growing, and skin rejuvenation.

 
 
14:00 - 14:15 Manuscript ID.  0442
Paper No.  2020-THU-S0701-O002
Yu-Hsin Huang
Award Candidate
High-Efficiency Organic Light-Emitting Diodes Using High-Index Transparent Electrode
Yu-Hsin Huang;Chung-Chih Wu

This work reports the adoption of high index transparent electrode as a new avenue for greatly boosting OLED efficiency. By using the Nb-doped TiO2 electrodes with a high refractive index of 2.4, along with high-performance organic materials, a high EQE of 41.5% is realized for conventional planar OLEDs.

 
 
14:15 - 14:30 Manuscript ID.  0288
Paper No.  2020-THU-S0701-O003
Sung-Chun Chen
Award Candidate
New Pixel Circuit with Threshold Voltage and Leakage Current Compensation Scheme for Wearable AMOLED Displays
Sung-Chun Chen;Yu-Sheng Lin;Chih-Lung Lin

This work presents an active-matrix organic light-emitting diode (AMOLED) pixel circuit for 15 Hz frame rate display applications. Simulation results show that the relative current error rates are less than 4%. Moreover, the OLED emission current fluctuations during the 66.6 ms emission period have significant improvements.

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14:30 - 14:45 Manuscript ID.  0319
Paper No.  2020-THU-S0701-O004
YU-SHU HUANG
Award Candidate
Flexible a-IGZO Thin-Film Transistor Based Differential Amplifier
YU-SHU HUANG;Cheng-Fu Hsu;Shu-Ming Hsu;Wen-Hsuan Lai;Feng-Yu Tsai;I-Chun Cheng

A flexible differential amplifier comprising 8 a-IGZO TFTs is demonstrated on polyimide substrates. It exhibits a gain of 11.6 dB, cut-off frequency of 620 Hz and CMRR of 15.3 dB. Furthermore, similar performance is observed when the flexible amplifier is inwardly and outwardly bent to a radius of 1 cm.

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Display Technology

Display Technology II
Thursday, Dec. 3, 2020  16:20-17:50
Presider: Prof. Chih-Lung Lin
Prof. Ko-Ting Cheng
Room: 6AB Room 625
Notes:
16:20 - 16:50 Manuscript ID.  0799
Paper No.  2020-THU-S0702-I001
Invited Speaker:
Yun-Li (Charles) Li

MicroLED Display – the next generation display technology
Yun-Li (Charles) Li;Tzu-Yang Lin;Ying-Tsang (Falcon) Liu;Yu-Hung Lai

MicroLED display is considered to be the next generation display technology due to its high brightness, wide color gamut, high aperture ratio, and good reliability. In additional to conventional display applications, MicroLED display can also be used for innovative display applications such as transparent and flexible display. Based on our proprietary PixeLED® display technology and SMAR·TechTM repair solution, we have demonstrated various new applications, such as borderless transparent display, ultra-high brightness wearable device, and ultra-thin flexible display.

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16:50 - 17:05 Manuscript ID.  0551
Paper No.  2020-THU-S0702-O001
Po-Hao Chen
Award Candidate
Laser Direct Writing for Passive-Matrix μ-LED Displays
Po-Hao Chen;Hsuan-Jen Chen;Chun-Xin Ye;Bo-Sheng Lee;Po-Wei Chen;Po-Wen Hsiao;Dong-Sing Wuu

The passive-matrix μ-LED display with a pixel size of 20×20 μm2 was achieved by using a maskless laser direct writing technique. This system can not only reduce the glass-mask usage but shorten the development time. The illuminance of blue passive-matrix μ-LED display was achieved 516 cd/m2 at 3 V.

 
 
17:05 - 17:20 Manuscript ID.  0475
Paper No.  2020-THU-S0702-O002
Yu-Hau Liou
Award Candidate
High stability Quantum Dots Mini-light-emitted-diode with Atomic Layer Deposition Printed on Black Matrix Layer
Yu-Hau Liou;Hao-Chung Kuo;Guan-Hao Chang;Yu-Ming Huang;Min-Hsiung Shih

In this study, we demonstrate a 3-in-1 mini-LED with 160 x 65µm sub-pixel chip size. The deposition of QD layer by using inkjet printing technique achieved a full-color display. Moreover, the use of the atomic layer deposition avoids the oxidation and steam, maintain the color purity of red and green.

 
 
17:20 - 17:35 Manuscript ID.  0598
Paper No.  2020-THU-S0702-O003
Li Jen Huang
Award Candidate
Sandwich Evaporation Technique For Uniform Green Perovskite Light Emitting Diode
Li Jen Huang

In this work, we fabricate MAPbBr3 perovskite with our innovative sandwich evaporation technique (SET) to form green light emitting diodes with better perovskite crystalline property. Our home-made chamber can be vacuumed with common rotary pump. This technique features with low vacuum and low cost approaches.

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17:35 - 17:50 Manuscript ID.  0453
Paper No.  2020-THU-S0702-O004
Ching-Fuh Lin
Award Candidate
High efficiency organic non-rare-earth-element micron fluorescent array for display technology
Ching-Fuh Lin;Jung-Kuan Huang;Teng-Yi Huang

Micro-LED of small pixel sizes is very challenging. Here we explore a simple and low-cost approach using exposure, development and etching to produce high efficiency non-rare-earth-element fluorescent arrays without the necessity of mass transfer. We have achieved pixel sizes of 60*20 μm and 6*2 μm fluorescent arrays.

 
 


Display Technology

Display Technology III
Friday, Dec. 4, 2020  13:10-15:40
Presider: Prof. Yi-Hsin Lin
Prof. Wei-Chia Su
Room: 6AB Room 625
Notes:
13:10 - 13:40 Manuscript ID.  0812
Paper No.  2020-FRI-S0703-I001
Invited Speaker:
Chih-I Wu

Van der Waals Epitaxial Growth of BiI3 toward Forming-Free and Flexible Resistive Switching Devices
Chih-I Wu;Chia-Shuo Li

Van der Waals epitaxial growth of BiI3 was demonstrated with a great potential in flexible resistive switching device with simple fabrication process and multistate data-storage capability. The devices with the copper foil/h-BN/BiI3/Au structure exhibited forming-free nature, high on/off ratio(>107), excellent data-retention(>104s), high voltage sweep endurance, and superior bending endurance.

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13:40 - 13:55 Manuscript ID.  0322
Paper No.  2020-FRI-S0703-O001
Kai-Ping Chang
Tunable Wavelength and Improved Durability in CdSe/CdS/ZnSe Core Quantum Dots with ZnS/ZnO Shell Using an Oleylamine Modification Process
Yu-Cheng Yeh;Kai-Ping Chang;Chung-Jui Wu;Jia-Hao Chang;Chih-Hong Lee;Dong-Sing Wuu

CdSe/CdS/ZnSe with ZnS/ZnO core-shell quantum dots were synthesized with various oleamine contents in the wavelength of 505-610 nm. The photoluminescence intensity of quantum dots with ZnO shell showed a relatively slow decay of 9.8% under 85°C/85% RH aging test for 500 hours, indicating good stability in resisting the long-term oxidation.

 
 
13:55 - 14:10 Manuscript ID.  0576
Paper No.  2020-FRI-S0703-O002
Po-Jui Chen
Image Distortion and Image Correction of Curved OLED Displays
Po-Jui Chen;Zih-Rou Cyue;Wei-Kai Lee;Chung-Chih Wu

In this report, we present a method how to quantitatively analyze and simulate the image distortion and the brightness reduction effect with cylindrical shell concave and convex structure. Also, we propose an effective method to re-construct a corrected image for curved OLED displays.

 
 
14:10 - 14:25 Manuscript ID.  0434
Paper No.  2020-FRI-S0703-O003
Yu-Heng Chu
Automatic Logo Detection and Segmentation in OLED/micro-LED TV display Based on Deep Learning
Yu-Heng Chu;Chieh-En Lee;Yu-Yi Chien;Jian-Jia Su;Chung-Hao Tien

Screen burn induced by long time static patterns or images seriously degrades the image quality of OLED TVs. In this work, we developed a two-step algorithm to automatically detect and track those burn-in occurrence regions. Proposed algorithm successfully detects specific patterns with high computational efficiency based on Mask R-CNN model.

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14:25 - 14:40 Manuscript ID.  0023
Paper No.  2020-FRI-S0703-O004
Hsi-Min Chou
The Strategies of Overcoming Technical Obstacles of Developing Automotive Narrow-Frame Displays
Hsi-Min Chou

This research would be focusing on solving narrow-frame display’s bright line issue, to meet the car manufacturer’s need. The experimental results show that the bright line situation could be improved by improving the process of production, matching the appropriate optical film, and designing the optical part of light guide plate.

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14:40 - 14:55 Manuscript ID.  0192
Paper No.  2020-FRI-S0703-O005
Yi-Han Tseng
Research on Transparent Liquid Crystal Display with Scattering Structure
Yi-Han Tseng;Gun-Yu Lu Lu;Cheng-Chang Li;Heng-Yi Tseng;Li-Min Chang;Guan-Wu Lin;Tsung-Hsien Lin

In this article, a transparent liquid crystal display made of polymer network twisted nematic liquid crystals (PNTNLC) and polarizers is used, which can light up the image and blur the background in one area at the same time, and improve the problem of image quality degradation caused by background interference.

 
 
14:55 - 15:10 Manuscript ID.  0256
Paper No.  2020-FRI-S0703-O006
Sung-Fu Tsai
Influence of UV Irradiance Strength on Polar Anchoring Properties of Photoalignment Polyimide Film
Sung-Fu Tsai;Shang-Jie Sun;Wei-Wei Chen;Shie-Chang Jeng

The difference of polar anchoring properties such as anchoring energy and pretilt angle of liquid crystal cell under different UV irradiance strength in photoalignment process are presented. In this work, vertical alignment nematic liquid crystal cell with commercial photoalignment polyimide film is used.

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Display Technology

Poster Session I
Friday, Dec. 4, 2020  15:40-17:30
Presider: Prof. Tien-Lung Chiu
Room: 6AB Courtyard
Notes:
Manuscript ID.  0566
Paper No.  2020-FRI-P0701-P001
Hung Yi Lin
Award Candidate
High-efficiency blue triplet-triplet fusion fluorescence organic light-emitting diodes
Chia Hsun Chen;Bo Yen Lin;Tien Lung Chiu;Chi Feng Lin;Jiun Haw Lee;Hung Yi Lin

High-efficiency blue triplet-triplet fusion fluorescence organic light-emitting diode was demonstrated with external quantum efficiency of 9.4% and CIE coordinates of (0.14, 0.17).

 
 
Manuscript ID.  0073
Paper No.  2020-FRI-P0701-P002
YI YANG CHEN
Award Candidate
Blue Organic Light Emitting Diodes Based on Iridium(III) Phosphors
YI YANG CHEN;Wen Yi Hung

Iridium(III) complexes 1 and 2 were employed as representative dopant in fabrication of blue PhOLED devices. The OLED devices gave turn-on voltage of 4.3 and 4.3 V, max. EQE 16.3 and 12.2 %, power efficiencies of 17.6 and 10.4 lmW‒1 and CIEx,y coordinates of (0.16, 0.26) and (0.16, 0.20).

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Manuscript ID.  0358
Paper No.  2020-FRI-P0701-P003
Ai Tsao
Award Candidate
True-blue TADF OLEDs with Dicyano-imidazole-based Molecules
Ai Tsao;Wei-Han Lin;Jhao-Cheng Lu;Chih-Hao Chang;Rong-Huei Yi;Chin-Wei Lu;Hsiang-Ling Shen

Three donor-acceptor molecules consisting of dicyano-imidazole and phenylcarbazole were synthesized and applied to the host materials. Combined the balanced carrier mobility with the proper device designs in this study, the efficiency roll-off under high luminance can be greatly reduced, and the practicality of the resulting OLEDs can be significantly improved.

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Manuscript ID.  0778
Paper No.  2020-FRI-P0701-P004
Kun-Rong Lin
Award Candidate
Novel Host Material for Blue Phosphorescent Organic Light-Emitting Diodes
Kun-Rong Lin;Chia-Hsun Chen;Bo-Yen Lin;Tien-Lung Chiu;Dalius Gudeika;Jiun-Haw Lee

In this report, a novel host material for blue phosphorescent organic light-emitting diode (OLED) was demonstrated with maximum external quantum efficiency (EQE) of 17.92 %, current efficiency of 42.5 cd/ A and power efficiency of 44.5 lm/ W.

 
 
Manuscript ID.  0692
Paper No.  2020-FRI-P0701-P005
Chia-Hsun Chen
Award Candidate
Deep Blue Organic Light Emitting Diode Based on Hydroxynaphthyridine-Derived Group III Metal Chelates with Different Thicknesses of Emitting Layer
Chia-Hsun Chen;Tien-Lung Chiu;Chin-Ti Chen;Jiun-Haw Lee

In this research, deep blue organic light emitting diode based on hydroxynaphthyridineDerived Group III metal chelates, AlmmND3, as non-doped emitting layer (EML) was demonstrated. By optimizing the thicknesses of EML, maximum external quantum efficiency (EQE) reached 1.92% for 30 nm of EML with CIE coordinates of (0.15, 0.07).

 
 
Manuscript ID.  0761
Paper No.  2020-FRI-P0701-P006
Wei-Yu Chen
Award Candidate
Green tandem OLED with high efficiency and low driving voltage
Wei-Yu Chen;Yi-Nan Lin;Chih-Chien Lee;Shun-Wei Liu

Improving the device performance of green phosphorescent organic light-emitting diodes (OLEDs) has been realized by employing the charge generation layer (CGL) to connect two light-emitting units. The remarkable results show that the external quantum efficiency and current efficiency of the tandem structure are two times of the reference device.

 
 
Manuscript ID.  0356
Paper No.  2020-FRI-P0701-P007
Shan-Yu Chen
Award Candidate
Efficient green OLEDs with dicyano-imidazole-based host materials to realize high luminance
Shan-Yu Chen;Ming-Han Wu;Ming-Jun Lin;Chih-Hao Chang;Rong-Huei Yi;Chien-Hsiang Lin;Yu-Chuan Fang;Hsiang-Ling Shen;Chin-Wei Lu

Three donor-acceptor molecules consisting of dicyano-imidazole and phenylcarbazole were synthesized and applied to the host materials. Combined the balanced carrier mobility with the proper device designs in this study, the efficiency roll-off under high luminance can be greatly reduced, and the practicality of the resulting OLEDs can be significantly improved.

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Manuscript ID.  0487
Paper No.  2020-FRI-P0701-P008
Tse-Ying Chen
Award Candidate
Near-infrared phosphorescence organic light emitting diode (PhOLED) with a new emitter
Tse-Ying Chen;Bo-Yen Lin;Hagos Tesfay;Chin-Ti Chen;Jiun-Haw Lee;Yu-Cheng Chiu;Tien-Lung Chiu

In this report, a new near-infrared (NIR) emitter has been applied to the NIR phosphorescent organic light-emitting diodes (PhOLED), which showed peak emission of electroluminescence at 682 nm and exhibited the device efficiency with a maximum external quantum efficiency of 4.81%.

 
 
Manuscript ID.  0353
Paper No.  2020-FRI-P0701-P009
Chen-Hsun Wu
Award Candidate
Method for rapid screening the formation of an Exciplex
Chen-Hsun Wu;I-Hsuan Chuang;Chih-Hao Chang;Chih-Chieh Tsai;Chin-Wei Lu

Preparation for OLEDs is time-consuming, this study brings up a fast-screening method for exciplex by measuring photoluminescence spectra in a comparatively high polar solvent. Exciplex was further confirmed by phosphorescence as well as transient photoluminescence decay. The results indicate that this method could promote the rapid development of exciplex research.

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Manuscript ID.  0357
Paper No.  2020-FRI-P0701-P010
YEH-HSIANG TSENG
Award Candidate
Research on bipolar host compounds consisting of dicyanimidazole and phenylcarbazole moieties
YEH-HSIANG TSENG;Dun-Cheng Huang;Cheng-Yung Ho;Shian-Sung Chiou;Chih-Hao Chang;Rong-Huei Yi;Ya-Chun Lei;Chien-Tzu Chiu;Chin-Wei Lu

Two bipolar host materials including ImM-s-Cz and ImM-mCP were proposed for realizing high-performance OLEDs. The two synthesized compounds possess balanced electron/hole transport capability, which can help expand the recombination region and thereby reduce triplet-triplet annihilation. The results demonstrate that the devices can achieve high efficiency in a high luminance range.

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Manuscript ID.  0074
Paper No.  2020-FRI-P0701-P011
Chang-Lun Ko
Award Candidate
Versatile Pt(II) Metal Phosphors: Emission Fine-Tuned by Stacking Assemblies
Chang-Lun Ko;Wen-Yi Hung

Pt(II) complex K416 was dopant in fabrication of OLED devices with varied doping ratio, with 1 wt.% of K416 in SimCP host exhibited max. EQE of 5.8% and CIEx,y coordinates of 0.20, 0.31. In contrast, 100 wt.% of K416 achieved max. EQE of 26.8% and CIEx,y coordinates of 0.41, 0.55.



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Manuscript ID.  0583
Paper No.  2020-FRI-P0701-P012
Han-Yu Tsai
Award Candidate
Comparing Quantum Yield of High-Efficiency Rare Earth-Free Fluorescent Materials with its Resonance of Functional Groups
Han-Yu Tsai;Yi-Shan Lin;Jung-Kuan Huang;Ching-Fuh Lin

A fluorescent film is formed using the solution and spin-coating method. The thickness of the film is only around 10 μm with its QY more than 80%. Based on FTIR measurement, comparison of resonance of functional group with the QY reveals that the lower the displacement, the higher the QY.

 
 
Manuscript ID.  0216
Paper No.  2020-FRI-P0701-P013
Wang Chi-Han
Award Candidate
Inline structure Micro-LED array display bonding process on glass circuit
Horng Ray-Hua;Chen Yi-Fan;Wang Chi-Han;Chen Hung-Yu

In recent years, displays are constantly seeking new breakthroughs, pursuing better resolution or more vivid colors for 3C product, even applications in VR/AR. In this work, we developed 64×32 inline structure Micro-LED array display by various bonding methods combined with glass circuit connecting passive matrix IC drive.

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Manuscript ID.  0390
Paper No.  2020-FRI-P0701-P014
Yu Hsin Kuo
Award Candidate
a-IGZO TFT with Wireless Gate Structure
Yu Hsin Kuo;Kuan Ju Chen;Shu Ming Hsu;I Chun Cheng

a-IGZO TFTs with gate electrodes monolithically integrated with wireless rectifier circuits are demonstrated. The wireless rectifier circuit is composed of a coil, a Ni/a-IGZO Schottky diode and two capacitors. The output voltage of the wireless rectifier circuit and electrical performance of the a-IGZO TFT with wireless power supply are investigated.

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Manuscript ID.  0094
Paper No.  2020-FRI-P0701-P015
Chuan Hui Ong
Al/Hf co-doped zinc oxide nanolaminate transparent thin film transistors
Chuan Hui Ong;Tsong-Sheng Lay

Al/Hf co-doped ZnO nanolaminates are grown by atomic layer deposition. Thin film transistor of Al/Hf co-doped ZnO with thickness ratio of 1:10 exhibits excellent performance with field effect mobility of 3.6 cm^2/Vs, On/Off ratio of over 10^6 and subthreshold swing of 2.97 V/decade.

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Manuscript ID.  0171
Paper No.  2020-FRI-P0701-P016
CHIA HUA LIU
Award Candidate
Single-exposure photo-alignment system using a spatial light modulator
CHIA HUA LIU

We report on a single-exposure photo-alignment using a spatial light modulator (SLM) which is able to provide spatially variant two-dimensional modulation of a light beam and a QWP. The combination of the SLM and the QWP enables arbitrary patterned alignments of LC molecules realized by single exposure.

 
 
Manuscript ID.  0245
Paper No.  2020-FRI-P0701-P017
Wei-Yuan Chen
Award Candidate
RAF-induced lattice reconfiguration in various thickness of blue phase liquid crystal
Wei-Yuan Chen

In previous work, we have demonstrate that using repetitively applied field (RAF) to reconfigure blue-phase liquid crystals into stable orthorhombic and tetragonal lattices. In this work, we use the same approach applied in different thickness of BPLC, then we discuss the lattice distortion and observe efficient electro-optic response after polymer-stabilized.

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Manuscript ID.  0203
Paper No.  2020-FRI-P0701-P018
Po-Chang Chen
Heating effect in field-induced lattice distortion in BPLC
Po-Chang Chen;Tsung- Hsien Lin

Applying a continuous field to the blue phase will generate a large heat accumulation, which will concentrate the BP lattice and make the non-cubic lattice unstable. The RAF technology can be used between field and field that has enough time to dissipate the heating, making the stable stretched non-cubic lattice.

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Manuscript ID.  0703
Paper No.  2020-FRI-P0701-P020
Chen-Rui Xie
Award Candidate
Plasmonic Random laser from dye-doped liquid crystal in photonic crystal fiber
Kasimayan Uma;Ja-Hon Lin;Chen-Rui Xie

The characteristic of plasmonic random lasers (PRLs) from dye-doped liquid crystals inside the PCFs without and with addition of silver nanoparticles (AgNPs) have been invesitgiated. Through pump energy increased, the intense light scattering as well as the increase in output intensity of RLs were obvious with the addition of AgNPs.

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Manuscript ID.  0209
Paper No.  2020-FRI-P0701-P021
YI-TE CHUANG
Simple fabrication of Pancharatnam-Berry phase optical elements
YI-TE CHUANG

This work proposes a simple photo-alignment exposure system for fabricating liquid crystal Pancharatnam-Berry phase optical elements (LCPBOEs) by using a LCPBOE that satisfies half-wave condition as a mask. A polarization grating, which is a kind of LCPBOEs, was successfully demonstrated to prove our concept and characterized.

 
 
Manuscript ID.  0749
Paper No.  2020-FRI-P0701-P022
CHIEN-AN LIN
Narrow light source bandwidth using chiral azobenzene-doped cholesteric liquid crystals
CHIEN-AN LIN;KO-TING CHENG

An approach to narrow the bandwidth of a light source is proposed. The chiral azobenzene-doped cholesteric liquid crystal (CAdCLC) cell is divided into two regions having two different pitch lengths. The wideband light source becomes a narrow one if it travels through two regions of the CAdCLCs cell.

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Manuscript ID.  0333
Paper No.  2020-FRI-P0701-P023
Wei-Chen Chiang
Surface engineering of Perovskite CsPbBr1.2I1.8 Quantum Dots Light-Emitting Diodes Using Trioctylphosphine Oxide Capping Ligand
Wei-Chen Chiang;Yen-Hung Tien;Ching-Ho Tien;Lung-Chien Chen

We prepare that by incorporating trioctylphosphine oxide capping ligand into the oleic acid/oleylamine system, CsPbBr1.2I1.8 quantum dots with excellent optoelectronic properties can be achieved. When the morphology of the QDs film with aqueous lead nitrate was modified during coating, a maximum luminosity of 502.7 cd/m2 was achieved for the QDLEDs.

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Manuscript ID.  0594
Paper No.  2020-FRI-P0701-P024
Fu-Jung Wu
High-Efficiency Organic Fluorescent Solution and Water-Resistant Fluorescent Film
Teng-Yi Huang;Jung-Kuan Huang;Fu-Jung Wu;Ching-Fuh Lin

Fluorescent dyes are combined with the film-forming polymer in the solvent to form a fluorescent solution. Its quantum yield is 92.3 %. We use the self-made high-efficiency fluorescent solution to deposit on substrates to form a fluorescent film, which can maintain its luminous properties without being encapsulated in the atmosphere.

 
 


Display Technology

Poster Session II
Saturday, Dec. 5, 2020  10:30-12:30
Presider: Prof. Tien-Jung Chen
Room: 6AB Courtyard
Notes:
Manuscript ID.  0274
Paper No.  2020-SAT-P0702-P001
Yu-Hsuan Su
A Novel Interaction System with a Transparent Display
Yu-Hsuan Su;Yu-Hsiang Tsai;Yu-Tzu Yi;Kuan-Ting Chen;Jia-Chong Ho

In this paper, we adopted a transparent display to develop an interactive system, and apply it in an entertainment field. The interactive system has three main technologies: eye tracking, object identification, and coordinate transformation. By integrating those technologies and high transmittance of the panel, we develop a novel interaction system.

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Manuscript ID.  0253
Paper No.  2020-SAT-P0702-P002
TZU-YI YU
Multi-view Information Fusion Technology Applied to Transparent Display Interactive System
TZU-YI YU;YU-HSUAN SU

This is a set of methods used on transparent displays to use tags to locate objects behind, and to make the three-dimensional images on the transparent display plane rotate and move according to the tag to make corresponding changes.

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Manuscript ID.  0265
Paper No.  2020-SAT-P0702-P003
Yu-Hsiang Liu
Highly stress protective design on flexible and transparent display
Yu-Hsiang Liu

This paper will introduce a display design that combines a stress matching layer with a transparent Micro LED display. This design can simultaneously make the display have high-intensity stress characteristics and low light loss.

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Manuscript ID.  0268
Paper No.  2020-SAT-P0702-P004
Yu-Hsiang Liu
Low-diffraction optical design of transparent panel
Wei-Lung Tsai;Yu-Hsiang Liu

In order to improve the transmittance and background visibility of the transparent micro LED, through proper pixel design and arrangement, we propose an anti-diffraction structure of 7.65 inches and 57 PPI, so the intensity of the diffraction pattern is less than 1%.

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Manuscript ID.  0048
Paper No.  2020-SAT-P0702-P005
Jane-Hway Liao
Stretchable Conductive Material Applicable to Three-Dimensional Structure and Wearable device
Jane-Hway Liao;Chih-Chia Chang;Wen-Lung Chen;Hong-Ming Dai;Chien-Chang Hung;Hung-Yi Chen;Yen Ching Kuo;Shu-Tang Yeh;Jia-Chong Ho

This is a three-dimensional deformable substrate using engraving technology. The deformable substrate must use stretchable conductive materials. The resistive and capacitive components of wearable devices can be manufactured by using this technology.

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Manuscript ID.  0630
Paper No.  2020-SAT-P0702-P006
An-Ting Hu
Simulation Platform for Spinning 3D Displays
An-Ting Hu;Wei-Cheng Yang;Pei-Li Sun;Chien-Ju Li;Kuan-Ting Chen

A simulation platform for rotational display systems including all-around and swept volumetric displays is proposed. This platform enables system designers to predict spatial and temporal image quality of various system parameters for optimizing the system performance.

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Manuscript ID.  0369
Paper No.  2020-SAT-P0702-P007
Yu-Hsuan Chen
A Prediction Model of Visual Comfort for an E-reading Device Based on Machine Learning
Hsin-Pou Huang;Hung-Chung Li;Minchen Wei;Yu-Hsuan Chen;Yennun Huang

In the study, a prediction model of visual comfort is proposed based on an artificial neural network. Using the ambient illuminance levels and screen parameters as features, the model can well represent the visual perception with high correlation coefficients.

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Manuscript ID.  0191
Paper No.  2020-SAT-P0702-P008
Senfar Wen
Estimation of Camera Spectral Sensitivity with Validation Samples
Jian Fu Zeng;Yu Che Wen;Yu Hsiung Lin;Senfar Wen;Long Hsu

Camera spectral sensitivity estimation based on quadratic programming with Tikhonov regularization is studied. The Lagrange multiplier of this method was usually determined with L-corner in literatures. We found that response errors of estimated spectral sensitivity can be effectively reduced by the use of validation samples to determine the Lagrange multiplier.

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Manuscript ID.  0210
Paper No.  2020-SAT-P0702-P009
Yong-Hsiang Chang
Thermally driven liquid crystal elastomer
Yong-Hsiang Chang

This investigation reports observations of deformation behavior in liquid crystal elastomer (LCE) films that are thermos-responsive materials. The deformation of the LCE films that originates from the difference in coefficient of the thermal expansion between top and bottom surfaces can be changed by heat and restored by heat removal.

 
 
Manuscript ID.  0266
Paper No.  2020-SAT-P0702-P010
Yu-Hsiang Liu
Highly Visible Micro LED Display
Wei-Lung Tsai;Yu-Hsiang Liu

This paper introduces three different substrates. If the ITRI standard 45U PI substrate is used, the transmittance is about 67%; if the glass substrate or high-temperature transparent T89 PI substrate is used as the substrate, the transmittance can be close to 80%.

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Manuscript ID.  0255
Paper No.  2020-SAT-P0702-P011
TSAI-YI CHEN
The Analysis of Angular Color Variation of MicroLEDs with CCT at 6500K
TSAI-YI CHEN;CHUN-WEN CHU;BING-MAU CHEN;SHANG-PING YING

The angular color variation of RGB micro-LED with correlated color temperature (CCT) at 6500K is investigated. The model is developed the RGB micro-LED devices, the color variations are analyzed. The measurement of angular color variation of the RGB micro-LED sample is conducted validate the simulation model and obtain good agreement.

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Manuscript ID.  0177
Paper No.  2020-SAT-P0702-P012
Chun-You Fan
Full Color Micro-LED Display Using Semi-polar (20-21) InGaN LED With Quantum Dot Photoresist Perform High Color Stability.
Chun-You Fan;Dong Yang;Sung-Wen Huang Chen;Yu-Ming Huang;Hao-Chung Kuo

This study reports a full-color u-LED array with high color stability which combined (20-21) semi-polar blue LED substrates and quantum dot photoresist color-conversion layer(QDPR) with a chip size of 50 um in diameter. RGB pixel showed few color shifts when high current density injected and achieved 114.4%NTSC and 85.4% Rec.2020.

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Manuscript ID.  0560
Paper No.  2020-SAT-P0702-P013
Ting-Yu Wei
Single-side Alternate Noise-free (S-A-N) Method Gate Driver On Array with TFT-LCD using a-Si for Narrow-bezel Application
Ting-Yu Wei;Guang-Ting Zheng;Po-Tsun Liu;Jin-Hao Huang

A hydrogenated amorphous silicon (a-Si:H) thin-film transistor (TFT) gate driver with Vth shift compensation for high reliability 14.1-inch automotive display has been proposed. For using Vth shift compensation structure, degradation at normal and high temperature environment of driving TFT and noise-free block could be compensated.

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Manuscript ID.  0110
Paper No.  2020-SAT-P0702-P014
HUNG-MING Dai
Verification of LTPS-TFT process on flexible transparent substrate
HUNG-MING Dai;Jane-Hway Liao;Chien-Chang Hung;Wen-Lung Chen;Yu-Hsiang Tsai;Yi-Hsiang Huang

To enhance view quality of transparent AMOLED, substrate was importance part. The panel’s transmittance were improved by increasing substrate’s transparency. Transparent polyimide was difficultly used for AMOLED’s substrate because of its thermal stability. We verify several PI’s characteristics, as a result, the prototype of high transparent AMOLED was produced.

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Manuscript ID.  0542
Paper No.  2020-SAT-P0702-P015
Bo-Yen Lin
High efficiency green quantum-dot light-emitting diode with hole transporting layer selection
Bo-Yen Lin;Kung-Ron Lin;Wen-Cheng Ding;Chia-Hsun Chen;Ya-Pei Kuo;Peng-Yu Chen;Hsueh-Hsing Lu;Chun-Yu Lee;Jiun-Haw Lee;Tien-Lung Chiu

A high efficiency of green quantum dot light emitting diode with current efficiency of 58.1 cd/A and external quantum efficiency of 16 % was demonstrated. Compared to reference device, there is 2.6x improvement, and which is originated from better hole injection to QD layer and carrier balance within QLED

 
 
Manuscript ID.  0315
Paper No.  2020-SAT-P0702-P016
Zhao-Cheng Zhan
Preparation of Quantum Dot Light‐Emitting Diodes Based on CsPbBr3 Perovskite Nanocrystals with Pure Natural Material
Zhao-Cheng Zhan;Tsai-Lun Hsieh;Ching-Ho Tien;Lung-Chien Chen

High-quality perovskite CsPbBr3 quantum dots (QDs-CsPbBr3) doped with pure natural aloe vera material were prepared using hot-injection method. The photoluminescence of aloe vera:QDs-CsPbBr3 was characterized by excitation wavelength of 522 nm, with narrow line-width emission of 20.8 nm. The QDLEDs exhibits a maximum luminance of 3161 cd/m2.

 
 
Manuscript ID.  0565
Paper No.  2020-SAT-P0702-P017
Meng-Yo Wu
Control of liquid crystal pretilt angles by gelators and planar alignment films
Hui-Chi Lin;Li-Yun Ke;Yu-Lin Hsiao;Meng-Yo Wu;Shao-Wei Feng

We propose a novel method to control the pretilt angles of liquid crystal (LC) molecules by doping with a gelator and using planar alignment layers coated on the substrates. Spontaneous vertical alignment of gelator was combined with the planar alignment layer to achieve 7–84° pretilt angles of the LCs.

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Manuscript ID.  0586
Paper No.  2020-SAT-P0702-P018
Han-Ping Tang
Formation and the flexoelectro-optic effect of ULH cholesteric liquid crystals
Xuzn-Zhi Xu;Tien-Jung Chen;Jin-Jei Wu;Han-Ping Tang

We apply an in-plane electric field on cholesteric liquid crystals (CLCs) to produce a uniform lying helix (ULH) structure. The ULH alignment was cured by the polymer to form a stable structure. The flexoelectro-optic effect was demonstrated by measuring an in-plane rotation of helical axis in ULH CLCs.

 
 
Manuscript ID.  0794
Paper No.  2020-SAT-P0702-P019
Wing-Kit Choi
Effects of dielectric anisotropy and electrode structure on fast-response VA-FFS LC mode for Virtual Reality (VR) displays
Wing-Kit Choi;Chih-Wei Hsu;Chia-Hsiang Tung;Bo-Kai Tseng

We investigate the difference between VA-FFS LC mode employing LC materials with positive and negative dielectric anisotropy. New 3D electrode design was found to help improve potential response speed, transmission and stability. Due to its fast sub-millisecond response, VA-FFS LC has been actively developed for VR/AR in recent years.

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Manuscript ID.  0587
Paper No.  2020-SAT-P0702-P020
Wei-Song Luo
Electro-optical characteristics of vertically aligned liquid crystals with three-terminal electrodes
Guo-Hao Huang;Tien-Jung Chen;Jin-Jei Wu;Wei-Song Luo

We propose a vertically aligned (VA) liquid crystal cell with three-terminal electrode structure and simulate the relationship between response time and electrode structure. Simulation results predict the VA LC with three-terminal electrodes exhibits faster response than that with conventional electrodes. Experimental results confirm simulation predictions.

 
 
Manuscript ID.  0099
Paper No.  2020-SAT-P0702-P021
Chun Ying Yang
Using a multi-angle director model for blue phase liquid crystal cell investigation
Chun Ying Yang;Ying Chieh Huang;Ting-Han Chen;Jin Jei Wu;Tien Jung Chen

In this study, we propose a multi-angle director model to simulate the optoelectronic characteristics of a polymer-dispersed liquid crystal (PS-BPLC). We performed simulations based on the director model and calculated BPLC cell with a weighting for each angle. The model calculated results are in good agreement with the experimental data.

 
 
Manuscript ID.  0792
Paper No.  2020-SAT-P0702-P022
Tien-Lung Chiu
Triplet exciton sharing to extend lifetime of blue PhOLLED
Tse-Ying Chen;Yu-Cheng Chiu;Tien-Lung Chiu

To extend the lifetime of blue PhOLED, a triplet exciton sharing layer was placed near the main recombination layer of emitting layer inside PhOLED. A green emitter was employed as energy transfer from blue emitter to prevent the triplet-polaron annihilation and triplet-triplet annihilation, leading to the enlarged device lifetime.

 
 
Manuscript ID.  0629
Paper No.  2020-SAT-P0702-P023
Che Yu Li
Green Organic Light-emitting Diodes with Exciplex Host
Che Yu Li;Chia Hsun Chen;Shih Chun Lin;Bo Yen Lin;Chi Feng Lin;Ken Tsung Wong;Tien Lung Chiu;Jiun Haw Lee

New TADF-type exciplex host with two different electron transport layers, DPPS and TPBi, were demonstrated. The optimums device shows the external quantum efficiency of 3.64%, the driving voltage of 5.2V, the luminance of 3971 cd/m2 at 6V, and CIE coordinates of (0.328, 0.569) and less carrier spike in TrEL.

 
 
Manuscript ID.  0004
Paper No.  2020-SAT-P0702-P024
Bo-Hao Hung
Synthesis of Symmetry / Asymmetry Luminescent Materials Consist of Carbazole / Anthracene Derivative for Organic Light Emitting Diodes
Bo-Hao Hung;Yu-Wei Fan;Tzu-Sheng Hunag;Wen-Yao Huang;Mei-Ying Chang

The organic emitting materials were synthesized, with carbazole phenol-containing derivatives as host, and anthracene fluorine-containing derivative as guest. They all owned well thermal stability and steric effect. In the component test, they were used as the light-emitting layer by evaporation and demonstrated good performances.

 
 
Manuscript ID.  0176
Paper No.  2020-SAT-P0702-P025
Yong-Hsiang Chang
Balanced Ambipolar Charge Transport Dicyano-imidazole-based Materials for Highly Efficient Organic Light-Emitting Diodes
Yong-Hsiang Chang;Li-Yin Chen

The carrier transport properites of three donor-acceptor molecules incorporating both dicyano-imidazole and carbazole moieties, namely imM-o-Cz, imM-m-Cz, and imM-p-Cz by time-of-flight measurement. imM-m-Cz exhibited one of the most balanced carrier mobility in the reported literature, confirming that the molecule has a balanced bipolar nature.

 
 
Manuscript ID.  0691
Paper No.  2020-SAT-P0702-P026
Ya-Wen Chang
Organic Light-Emitting Diodes Fabricated on Flexible Indium Tin Oxide
Ching-Ming Hsu;Wen-Tuan Wu;Yan-Yi Huang;Ya-Wen Chang

OLEDs fabricated on an intentionally cracked ITO electrode have shown improved efficiency at a high electrical stress. The improved OLED characteristics are attributed to crack-free surface of the intentionally cracked ITO. In addition, high mechanical flexibility of intentionally cracked ITO has shown its high potential for flexible OLED applications.

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Manuscript ID.  0252
Paper No.  2020-SAT-P0702-P027
Juan Wen Kai
Fabrications of hologrpahic optical elements by means of liquid crystal lenses
Juan Wen Kai

In this study, a liquid crystal lens as a template during holographic exposure processes was investigated and demonstrated to fabricate HOEs as lenses.The experimental results show optical comparisons of generated Fresnel zones of completed HOEs via both templates of conventional glass lens and liquid crystal lens during fabrication processes, respectively.

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