Session Index

Display Technology

Poster Session II
Saturday, Dec. 5, 2020  10:30-12:30
Presider: Prof. Tien-Jung Chen
Room: 6AB Courtyard
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.

Manuscript ID.  0253
Paper No.  2020-SAT-P0702-P002
Multi-view Information Fusion Technology Applied to Transparent Display Interactive System

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.

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.

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%.

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.

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.

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.

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.

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%.

Manuscript ID.  0255
Paper No.  2020-SAT-P0702-P011
The Analysis of Angular Color Variation of MicroLEDs with CCT at 6500K

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.

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.

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.

Manuscript ID.  0110
Paper No.  2020-SAT-P0702-P014
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.

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.

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.

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.

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.