The Experts below are selected from a list of 45906 Experts worldwide ranked by ideXlab platform
Man Wong - One of the best experts on this subject based on the ideXlab platform.
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active matrix Organic light emitting Diode displays realized using metal induced unilaterally crystallized polycrystalline silicon thin film transistors
IEEE Transactions on Electron Devices, 2002Co-Authors: Zhiguo Meng, Man WongAbstract:Requirement on thin-film transistors, particularly in terms of current-drive and parameter uniformity, for active-matrix Organic Light-Emitting Diode displays, was analyzed. Metal-induced unilaterally crystallized polycrystalline silicon thin-film transistor technology was shown to satisfy such and other demands. Though pixel designs involving more transistors were certainly advantageous, appropriate biasing scheme allowed a simpler and larger aperture-ratio two-transistor design. As a demonstration, active matrices were fabricated and integrated with Organic Light-Emitting Diodes to make monochrome video display panels, each consisting of 120 rows and 160 columns.
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32 3 metal induced unilaterally crystallized polycrystalline silicon thin film transistor technology for active matrix Organic light emitting Diode displays with reduced susceptibility to cross talk
SID Symposium Digest of Technical Papers, 2002Co-Authors: Zhiguo Meng, Hoi Sing Kwok, Man WongAbstract:In active-matrix Organic Light-Emitting Diode displays, a pixel in its non-emitting state is determined to be more sensitive to transistor leakage than one in its emitting state. An improved device design is proposed and implemented, employing gate-modulated lightly-doped drain to suppress transistor leakage and to improve image quality.
Chun Hao Lin - One of the best experts on this subject based on the ideXlab platform.
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Spirally Configured (cis-Stilbene) Trimers: Steady-State and Time-Resolved Photophysical Studies and Organic Light-Emitting Diode Applications
ACS Applied Materials and Interfaces, 2018Co-Authors: Shiang Fu Hung, Po Hsun Fang, Fang Yuan Tsai, Shingo Samori, Chien-tien Chen, Yi Wei, Takumi Kimura, Mamoru Fujitsuka, Tetsuro Majima, Chun Hao LinAbstract:This article reports for the time-resolved photophysical studies of spirally configured (cis-stilbene) trimers and their spin-coated Organic Light-Emitting Diode (OLED) device performances. Transient absorption profiles of spirally configured, ter-(cis-stilbene) were studied by pulse radiolysis. The emission profiles after charge recombination of their incipient radical ions in benzene provides insights into the emission mechanism and efficiency in OLED devices. Blue-, sky blue-, and green-emitting OLED devices for a maximum external quantum efficiency are 4.32%, 4.70%, and 2.77%, respectively, by solution process.
Ohkyong Kwon - One of the best experts on this subject based on the ideXlab platform.
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A Simple Pixel Structure Using Polycrystalline-Silicon Thin-Film Transistors for High-Resolution Active-Matrix Organic Light-Emitting Diode Displays
IEEE Electron Device Letters, 2012Co-Authors: Hai-jung In, Ohkyong KwonAbstract:A simple pixel structure comprising two transistors and one capacitor and a novel driving method are proposed for small-sized and high-resolution active-matrix Organic Light-Emitting Diode displays on polycrystalline-silicon thin-film transistor (TFT) backplane. The proposed pixel increases the yield due to small number of TFTs and improves image quality by compensating threshold voltage variations of driving TFTs. The proposed pixel is designed as test pixels with 353 pixels per inch, and the measured emission current error range of -74.2% -60.6% is improved to the range of -2.5% -2.1% when the proposed pixel is used.
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Fast current programming method using current amplifier for active matrix Organic light emitting Diode displays
Electronics Letters, 2010Co-Authors: I.-h. Jeong, Ohkyong KwonAbstract:A fast and accurate current programming method with a current unity-gain amplifier which provides high gain and driving capability has been designed. Experimental results show that the maximum error of the programming current in pixels is less than 0.22 least significant bit using the proposed current driving method and the lowest grey-level current, 6.7 nA, can be successfully programmed within 19 s. The power consumption of the proposed current driving method with a channel is 10.5 W. This performance is good enough to apply to a 12-inch-wide extended graphics array resolution format active matrix Organic light emitting Diode display with 8-bit greyscale.
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real time external sensing and compensation method for Organic light emitting Diode displays
Electronics Letters, 2009Co-Authors: Ohkyong KwonAbstract:A real-time external sensing and compensation method for active matrix Organic light emitting Diode displays is proposed. The proposed method senses and compensates for the variation of electrical characteristics of poly-Si thin-film transistors (TFTs) during display time. Experimental results show that the proposed method successfully senses the electrical characteristics of TFTs in real-time and compensates for the non-uniform emission current error.
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A real time video data adjusting method for active matrix Organic light emitting Diode displays with high image quality
IEEE Transactions on Consumer Electronics, 2009Co-Authors: Hai-jung In, Ohkyong KwonAbstract:A real time video data adjusting method for television applications of active matrix Organic light emitting Diode (AMOLED) displays with high image quality is proposed. The proposed method senses electrical characteristics of polycrystalline silicon (poly-Si) thin film transistors (TFTs) and Organic light emitting Diode (OLED) of pixels and compensates nonuniform luminance due to the electrical characteristic variations of TFTs and the degradation of OLEDs by adjusting video data. The sensing and compensation operations are performed while the image is displayed on the screen. Experimental results show that the luminance error is improved from 92.1% to 0.8% when the proposed adjusting method is used. The proposed method is demonstrated on 14.1-inch AMOLED display panel.
Zhiguo Meng - One of the best experts on this subject based on the ideXlab platform.
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active matrix Organic light emitting Diode displays realized using metal induced unilaterally crystallized polycrystalline silicon thin film transistors
IEEE Transactions on Electron Devices, 2002Co-Authors: Zhiguo Meng, Man WongAbstract:Requirement on thin-film transistors, particularly in terms of current-drive and parameter uniformity, for active-matrix Organic Light-Emitting Diode displays, was analyzed. Metal-induced unilaterally crystallized polycrystalline silicon thin-film transistor technology was shown to satisfy such and other demands. Though pixel designs involving more transistors were certainly advantageous, appropriate biasing scheme allowed a simpler and larger aperture-ratio two-transistor design. As a demonstration, active matrices were fabricated and integrated with Organic Light-Emitting Diodes to make monochrome video display panels, each consisting of 120 rows and 160 columns.
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32 3 metal induced unilaterally crystallized polycrystalline silicon thin film transistor technology for active matrix Organic light emitting Diode displays with reduced susceptibility to cross talk
SID Symposium Digest of Technical Papers, 2002Co-Authors: Zhiguo Meng, Hoi Sing Kwok, Man WongAbstract:In active-matrix Organic Light-Emitting Diode displays, a pixel in its non-emitting state is determined to be more sensitive to transistor leakage than one in its emitting state. An improved device design is proposed and implemented, employing gate-modulated lightly-doped drain to suppress transistor leakage and to improve image quality.
Jin Jang - One of the best experts on this subject based on the ideXlab platform.
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GO:PEDOT:PSS for High-Performance Green Phosphorescent Organic Light-Emitting Diode
IEEE Electron Device Letters, 2013Co-Authors: Wilson Jose Da Silva, Abd Rashid Mohd B. Yusoff, Jin JangAbstract:A high-performance green phosphorescent Organic Light-Emitting Diode (GPhOLED) based on easily available graphene oxide (GO)-doped poly(styrenesulfonate)-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) as anode buffer layer and simple device fabricating process has been demonstrated. The GO:PEDOT:PSS-based GPhOLEDs show a better performance compared to the PEDOT:PSS only GPhOLEDs with current and power efficiencies of 52 and 41 cd/A and 36 and 27 lm/W at 1000 cd/m2, respectively. These findings shed new light on the development of high-performance GPhOLEDs.
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New Pixel Design on Emitting Area for High Resolution Active-Matrix Organic Light-Emitting Diode Displays
Journal of Display Technology, 2010Co-Authors: Soon-kwang Hong, Jin JangAbstract:We propose new pixel design on emitting area and corresponding shadow mask design for high resolution active-matrix Organic Light-Emitting Diodes (AMOLEDs) to overcome the limitation of conventional shadow mask process. The proposed scheme has the extended emitting area into adjacent sub-pixel and gives flexibility for manufacturing shadow mask with quarter resolution compared with conventional requirement. The proposed scheme can use normal pixel driving circuit; however, anode electrode in each sub-pixel covers adjacent pixels to extend its own emitting aperture area for high resolution AMOLEDs. We have successfully implemented this scheme in a 4.3-in-sized WVGA (854 × RGB × 480) AMOLED using p-type advanced-solid phase crystallization (A-SPC) backplane technology and top emissive Organic Light-Emitting Diode (OLED) device structure and evaluated key performance characteristics.