Browsing by Author "Mo, Chi-Neng"

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A Color Break-Up Suppression Method, Stencil-FSC Method, for Field-Sequential-Color(FSC) LCDs with low Power Consumption
(2008)
Huang, Yi-Pai
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Lin, Fang-Cheng
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Wei, Ching-Ming
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Shieh, Han-Ping D.
;
Tsai, Chi-Chung
Field sequential color liquid crystal display (FSC-LCDs) is a display without color filter, so it achieves several attractive advantages. However, it has a serious issue called color breakup (CBU), which degrades image quality and causes viewers uncomfortable. Consequently, the "Stencil-FSC" method, which utilized multi-color image in a single field, was proposed to suppress CBU. Moreover, optimizations of hardware parameters were done to get the optimal CBU suppression. Finally, the Stencil-FSC method was successfully demonstrated on a 32-inch FSC-LCD with effectively suppressed CBU, resulting contrast ratio of more than 5,500:1, and average power consumption of less than 45 Watt.
An Auto-Stereoscopic 3D Display Using Tunable Liquid Crystal Lens Array that Mimics Effects of GRIN Lenticular Lens Array
(2009)
Kao, Yung-Yuan
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Huang, Yan-Pean
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Yang, Kai-Xian
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Chao, Paul C. -P.
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Tsai, Chi-Chung
A tunable liquid crystal lenticular lens array is proposed to compose an auto-stereoscopic 3D display. The focusing can be achieved based on non-uniform phase retardation across the width of the LC lenticular lens, mimicking the effects of gradient index (GRIN) lens. The viewing distance and zones of this display can be adjusted in an on-line fashion to track the viewer position relative to the display. The proposed scheme can present the lenticular lens and the LC GRIN lens simultaneously, so that the simulation results can express the low value of crosstalk of 9% by the lenticular lens array and the LC GRIN lens array.
Anodic aluminum oxide as a template for CNT field emitters and AAO-CNT triode structure
(2005)
Lin, Chen-Chun
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Pan, Fu-Ming
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Liu, Mei
;
Chang, Kai-Chun
;
Chen, Po-Lin
We have used anodic aluminum oxide (AAO) as the template to grow carbon nanotubes (CNTs) for the application of field-emission display technology. In order to obtain optimal field emission properties, we have tried to control the density and the length of the CNTs grown from AAO pore channels by tuning the growth time and the CH4 concentration of the precursor gas mixture. AAO pore channel arrays were grown in the triode structure, which was fabricated on silicon wafers by conventional integrated circuit processes.
Anodic-aluminum-oxide templated carbon nanotubes in the field emission triode
(2007)
Lin, Chen-Chun
;
Chang, Kai-Chun
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Pan, Fu-Ming
;
Kuo, Cheng-Tzu
;
Liu, Mei
To fabricate the field-emission triode structure, carbon nanotubes (CNT) were used as field emitters and grown in the anodic aluminum oxide (AAO). AAO thin layer with vertical pore channels was first prepared on the Si (100) substrate and was used to template the following growth of CNTs in an electron cyclotron resonance chemical vapor deposition (ECR-CVD) system. The tetraethoxysilane (TEOS) oxide and At layer were deposited on the CAITs and acted as the dielectric layer and gate electrode layers for the triode structure, respectively. Reactive ion and wet etches were then used to open the field-emission area in the triode. Field-emission characteristics of the CNT emitters have been studied and an anode turn-on field of similar to 8.05 V/mu m was measured.
BUBBLELESS PACKAGING METHOD
(2010-09-16)
FAN, Shih-Kang
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Hsu, Ching-Hsiang
;
Chiu, Cheng-Pu
;
Mo, Chi-Neng
;
Chiang, Mei-Tsao
A bubbleless packaging method is provided. The method is applicable to package a display element. In the method, firstly, a first substrate and a first protective layer are provided. The first protective layer is formed on the first substrate. Then, a second substrate and a second protective layer are provided. The second protective layer is formed on the second substrate. Then, a plasma treatment is performed on surfaces of the first protective layer and the second protective layer. Then, the first substrate and the second substrate are dipped into a solution after the plasma treatment. Then, the first substrate and the second substrate are laminated in the solution, wherein the first protective layer faces the second protective layer. Finally, the first substrate and the second substrate are taken out from the solution.
Characterization and Packaging of Electronic Paper Display Based on Particle Polarization
(2009)
Chiu, Cheng-Pu
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Hsu, Ching-Hsiang
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Chen, Shih-Chiang
;
Fan, Shih-Kang
;
Chiang, Mei-Tsao
A particle-based reflective electronic paper has been characterized. Based on the particle polarization, we drive the neutral microspheres to form particle chains in a water solution by applying an AC electric field. The particle-chain transformation regulates the incident light and the reflectivity of the display. Here we developed the device packaging with hydrophilic surface treatments and UV sealing techniques. With a passive-matrix addressing scheme, a reflective electronic paper having 64x64 pixels by particle polarization is realized on a 4 inch by 4 inch panel.
CMOS-Like Ambipolar Organic/Inorganic TFTs for AMLCD and AMOLED Applications
(2009)
Chu, Yi-Hsing
;
Wu, Gao-Ming
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Chuang, Chiao-Shun
;
Yu, Wei-Kuan
;
Chen, Fang-Chung
Air-stable ambipolar thin-film transistors (TFTs) based on double active layer of pentacene / a-IGZO (amorphous In(2)O(3)Ga(2)O(3)-ZnO) have been fabricated on SiO(2)/p-Si substrates. The a-IGZO exhibits n-channel behavior, while pentacene presents p-channel characteristics. Most n-type organic materials are easily affected by moisture and oxygen, thus the measurement of ambipolar devices in ambience air is difficult. However, a-IGZO not only has outstanding mobility but also has good stability while being measured in ambient air. In our work, a CMOS-like inverter was constructed by using two identical ambipolar transistors and the voltage gain up to 70 was obtained. The inverter can be operated in both the first and the third quadrants simplifying circuit design for AMFPD applications.
DISPLAY
(2009-05-28)
Fan, Shih-Kang
;
Chiu, Cheng-Pu
;
Mo, Chi-Neng
;
Chiang, Mei-Tsao
A display including a first substrate, a first electrode, a second substrate, a second electrode, and a mixed solution is provided. The first electrode is disposed on the first substrate, and the second electrode is disposed on the second substrate. In addition, the mixed solution is disposed between the first electrode and the second electrode. Moreover, the mixed solution includes a solution and a plurality of first neutral micro-particles disposed in the solution.
DISPLAY
(2010-06-17)
Fan, Shih-Kang
;
Chiu, Cheng-Pu
;
Hsu, Ching-Hsiang
;
Mo, Chi-Neng
;
Chiang, Mei-Tsao
A display includes a first substrate, a first electrode, a second substrate, a second electrode and a display material layer. The first electrode is disposed on the first substrate and the second electrode is disposed on the second substrate. The display material layer is disposed between the first electrode and the second electrode. The display material layer of the invented display includes a solution and a plurality of first micro beads, wherein each of the first micro beads further has a plurality of different axis lengths in different axis directions, and the axis length in at least an axis direction is different from the axis lengths in the rest axis directions so that the first micro beads present different arrangement densities in different driving frequencies under the influence of polarized self-arrangement effect.
DISPLAY MEDIUM AND DISPLAY
(2010-04-01)
Fan, Shih-Kang
;
Chiu, Cheng-Pu
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Hsu, Ching-Hsiang
;
Chiang, Mei-Tsao
;
Mo, Chi-Neng
A display medium and a display are provided. The display medium includes a thermal-sensitive solution and a number of micro particles. The micro particles are dispersed in the thermal-sensitive solution. At a first temperature, the thermal-sensitive solution is in a liquid form, such that the micro particles move freely. At a second temperature, the thermal-sensitive solution is in a colloid form, such that the micro particles are fixed. The first temperature differs from the second temperature.
DOPANT EFFECTS OF PHOTOREACTIVE ZnO NANOPARTICLES ON FAST RESPONSE LC MATERIALS IN OPTICAL COMPENSATED BEND (OCB) MODE LIQUID CRYSTAL DISPLAYS
(2010-11-01)
Lin, Hong-Cheu
;
Jiang, Meng-Dan
;
Wang, Ling-Yung
;
Chen, Wei-Hong
;
Chen, Szu-Fen
Photoreactive ZnO nanoparticles containing surface-modified acrylate groups were synthesized and applied to improve the threshold voltage in optical compensated bend (OCB) mode liquid crystal display (LCD) cells. The dopant effects of ZnO nanoparticles with or without commercial reactive monomer additives (1 wt% doping ratio) on the values of threshold voltage (V-th) and response time in OCB cells were explored by applying different voltages to photo-reactive ZnO nanoparticles during UV curing processes in OCB cells to compare the influences of doped ZnO nanoparticles. As a result, we successfully eliminated or reduced the splay state of OCB mode and thus reduced threshold voltage. However, lower transmissions and higher values of the response time were observed in OCB cells doped with photoreactive ZnO nanoparticles, and the decreasing of V-th, is independent of various doping materials. Moreover, lower transmission and high response time could be improved through sequential voltage-applied procedures, i.e., bend black mode (10 V) -> bend white mode (2.5 V), under the immobile minimum threshold voltage at the bent state during UV curing processes to achieve lower pre-transition and fast response time properties by only doping photoreactive ZnO nanoparticles.
DOPANT EFFECTS OF PHOTOREACTIVE ZnO NANOPARTICLES ON FAST RESPONSE LC MATERIALS IN OPTICAL COMPENSATED BEND (OCB) MODE LIQUID CRYSTAL DISPLAYS
(2010-11-01)
Lin, Hong-Cheu
;
Jiang, Meng-Dan
;
Wang, Ling-Yung
;
Chen, Wei-Hong
;
Chen, Szu-Fen
Photoreactive ZnO nanoparticles containing surface-modified acrylate groups were synthesized and applied to improve the threshold voltage in optical compensated bend (OCB) mode liquid crystal display (LCD) cells. The dopant effects of ZnO nanoparticles with or without commercial reactive monomer additives (1 wt% doping ratio) on the values of threshold voltage (V(th)) and response time in OCB cells were explored by applying different voltages to photo-reactive ZnO nanoparticles during UV curing processes in OCB cells to compare the influences of doped ZnO nanoparticles. As a result, we successfully eliminated or reduced the splay state of OCB mode and thus reduced threshold voltage. However, lower transmissions and higher values of the response time were observed in OCB cells doped with photoreactive ZnO nanoparticles, and the decreasing of V(th), is independent of various doping materials. Moreover, lower transmission and high response time could be improved through sequential voltage-applied procedures, i.e., bend black mode (10 V) -> bend white mode (2.5 V), under the immobile minimum threshold voltage at the bent state during UV curing processes to achieve lower pre-transition and fast response time properties by only doping photoreactive ZnO nanoparticles.
Effects of Hydrogen Plasma Treatment on Field-Emission Characteristics of Palladium Nanogap Emitters
(2008)
Tsai, Chih-Hao
;
Chen, Kuan-Jung
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Pan, Fu-Ming
;
Lo, Hsiang-Yu
;
Li, Yiming
Nanogaps were prepared on the Pd line electrode by focused ion beam, and electron field-emission characteristics of the Pd nanogap emitter subject to hydrogen plasma treatment were studied. The as-prepared nanogap had smooth and uniform gap edges, and thus field-emission characteristics of the nanogap emitter were primarily dependent on the gap separation. After the hydrogen plasma treatment, the field-emission property of the Pd nanogap emitter was significantly enhanced. The improvement in the field-emission property was mainly attributed to formation of a ragged morphology on the nanogap emitter during the hydrogen plasma treatment. The ragged morphology provided more emitting sites with a high field enhancement factor. The Fowler-Nordheim plot was used to elucidate the dependence of field-emission characteristics of the Pd nanogap emitter on the plasma-induced ragged morphology. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.2988646] All rights reserved.
Emission Efficiency Dependence on the Tilted Angle of Nanogaps in Surface Conduction Electron-Emitter
(2008)
Li, Yiming
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Kuo, Yi-Ting
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Cheng, Hui-Wen
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Yeh, Ta-Ching
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Lo, Hsiang-Yu
In this work, the emission efficiency of the novel surface conduction electron-emitter corresponding to tilted angles (0) of the driving electrode is studied numerically. Due to the small angle, the emitter apex becomes significant and induces large electric field. The large electric field then attracts more particles into vacuum and then increases the emission current. However, the structure of the driving electrode limits the electron trajectory while the angle decreases, and it reflects the portion of collected current by the anode decreases and makes a drop in emission efficiency. It shows there is the highest emission efficiency (about 37%) under an optimum angle theta = 60 degrees. The result provides an insight into the relation between emission efficiency and emitter apex.
Enhanced power efficiency of single-layer white triplet polymer light-emitting diodes by blending with polymer oxides
(2008)
Chen, Yung-Shiuan
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Chien, Shang-Chieh
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Chen, Fang-Chung
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Lian, Jan-Tian
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Tsou, Chien-Lung
In this study, we have demonstrated enhanced performance of blue, red and white phosphorescent polymer light-emitting diodes (PLEDs) by blending poly(ethylene glycol) (PEG) into the active layer of the devices. By introducing PEG into the PLEDs, the turn-on voltages of these devices became lower than those of the conventional devices. In addition, the luminance efficiency and the external quantum efficiency of the blue and while phosphorescent PLEDs were both improved. Most important of all, because of the lower operating voltage, the higher power efficiency (7.3 lm/W, 1.5 lm/W, 4.61m1W) of the blue, red and white phosphorescent PLEDs than those of the control devices (2.9 lm/W, 1. 1 lm/W, 1. 9 lM/W) have been achieved, respectively. Finally, the improvement mechanism will be discussed.
Growth of carbon nanotube field emitters in the triode structure using anodic aluminum oxide as the template
(2007-04-01)
Lin, Chen-Chun
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Chang, Kai-Chun
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Pan, Fu-Ming
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Kuo, Cheng-Tzu
;
Liu, Mai
Carbon nanotubes (CNT) were grown in anodic aluminum oxide (AAO) and used as field emitters in a triode structure. To fabricate the field-emission triode structure, nanoporous anodic aluminum oxide (AAO) thin layer was first prepared on the Si(100) substrate, followed by the growth of vertically aligned carbon nanotubes in AAO pore channels by electron cyclotron resonance chemical vapor deposition (ECR-CVD). The SiO2 dielectric and Al gate electrode layers required for the triode structure were directly deposited on the CNTs. Reactive ion and wet etches were then used to open the field-emission area in the triode. Scanning electron microscopy and Raman spectroscopy studies revealed that damage to CNT emitters in the etched area was trivial. Field-emission characteristics of the CNT emitters have been studied and an anode turn-on electric field of similar to 8.05 V/mu m was measured. (C) 2007 Elsevier B.V. All rights reserved.
Improvement of fast response LC materials by bent-core dopants in optical compensated bend (OCB) mode liquid crystal displays
(2008)
Wang, Ling-Yung
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Tsai, Shin-Yi
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Lin, Hong-Cheu
;
Chen, Szu-Fen Fenny
;
Lyu, Robert
The stabilization of bend configuration in optical compensated bend (OCB) mode cells by doping bent-core molecules was developed in this study. The values of response time (tau) and threshold voltage (V-th) in OCB cells were dependent on not only the concentration but also the shape, dipole direction, and flexible chain length of the doping molecules. Experimental results showed that the total response time (tau(total)) and threshold voltage (V-th) of OCB cells could be reduced by doping bent-core molecules, and smaller tau values by reducing flexible chain lengths as well as smaller V-th values by reducing polarization of bent-core molecules were normally obtained. In general, higher concentrations of dopants normally induced shorter field-on response time (tau(on)) and a minimum field-off response time (tau(off)) occurred at 0.5% of doping concentration, where the fastest total response time (tau(total)) values were achieved.
Improvement of fast responsive LC materials by bent-core dopants in optical compensated bend mode liquid crystal displays
(2011-03-01)
Lin, Hong-Cheu
;
Wang, Ling-Yung
;
Jiang, Meng-Dan
;
Tsai, Shin-Yi
;
Chen, Szu-Fen Fenny
Stabilization of bend configuration in optical compensated bend (OCB) mode cells by doping bent-core molecules was developed in this study. The values of response time (t) and threshold voltage (V(th)) in OCB cells were dependent not only on the concentration but also on the shape, dipole direction, and flexible chain length of the doping molecules. Experimental results showed that the total response time (t(total)) and threshold voltage (V(th)) of OCB cells could be reduced by doping bent-core molecules, and smaller t values produced by reducing flexible chain lengths. In addition, attaining smaller V(th) values could be achieved by reducing polarization of bent-core molecules. In general, higher concentrations of dopants normally induced shorter field-on response time (t(on)) and a minimum field-off response time (t(off)) occurred at 0.5% of doping concentration, where the fastest total response time (t(total)) values were achieved.
Luminescence and Spectroscopic Properties of Yellow-Emitting Carbonitride Phosphors and Their Application in White LEDs
(2010)
Wu, Yun-Chen
;
Chen, Teng-Ming
;
Chiu, Chuang-Hung
;
Mo, Chi-Neng
;
應用化學系
A series of yellow-emitting carbonitride phosphors with compositions of (Y(1-x)Ce(x))(2)(CN(2))(3) (x = 0-0.1) was synthesized by using exothermic solid-state metathesis reactions. The wavelength of the broad band yellow emission was tunable, varying from 570 to 577 nm. The photoluminescence (PL) intensity enhanced with increasing Ce(3+) dopant content and was optimized at 3 mol % under excitation at 415 nm. We analyzed the 5d energy levels of Ce(3+) in a capped trigonal prismatic complex and estimated the vibronic coupling parameters and Stokes shifts. To understand the thermal quenching behavior, the temperature-dependent PL for (Y(1.97)Ce(0.03))(2)(CN(2))(3) was investigated. To demonstrate its potential application, we fabricated a warm white light-emitting diode (LED) using (Y(1.97)Ce(0.03))(2)(CN(2))(3), pumped with a 420 nm GaInN LED chip, and the electroluminescence data were also presented. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3476307] All rights reserved.
Microlens array by ink-jet technology for LCD backlight applications
(2008)
Hung, Chien-Hsiang
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Yu, Tsung-Han
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Cheng, Jung-An
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Chang, Chi-Hsien
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Hsiau, Yi-Hau
This research uses Ink-jet printer process to fabricate microlens on the bottom of a LGP in a fast and cost-effective way. Compared with typical dot printing method, Ink-jet printing is able to save 50% material consumption. In addition, the microlens with UV-curable epoxy could be well controlled in the radius, contact angle and arbitrary arrangement. A 20x20cm(2) LGP can be fabricated with desired microlens pattern within 10 seconds, which exhibits a potential to apply ink-jet process upon the high-speed mass production.