The Experts below are selected from a list of 2127 Experts worldwide ranked by ideXlab platform
Graham J Nathan - One of the best experts on this subject based on the ideXlab platform.
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the influence of wind speed Aperture Ratio and tilt angle on the heat losses from a finely controlled heated cavity for a solar receiver
Renewable Energy, 2019Co-Authors: Alfonso Chinnici, Mehdi Jafarian, Maziar Arjomandi, Bassam B Dally, Graham J NathanAbstract:Abstract The first systematic experimental study of the combined influences of wind speed (0–9 m/s), Aperture Ratio (0.33–1) and tilt angle (15°–45°) on the mixed (free and forced) convective heat losses from a heated cavity, is presented. The cylindrical cavity is heated by 16 individually temperature-controlled heating elements in the open section of a wind tunnel. Heat flux distribution and total heat losses from the cavity were measured. A complex inter-dependence was found between Aperture Ratio, wind speed and convective heat losses. In particular, the total heat losses can vary by up to ∼75% by varying the Aperture Ratio from 0.33 to 0.75, for no wind condition, but the effect of Aperture Ratio is decreased as wind speed is increased. The tilt angle was found to have a small effect on the heat losses relative to the Aperture Ratio and wind speed. Nevertheless, the average minimum mixed heat loss for various wind speeds occurs for a tilt angle of between 15° and 30° for a downward tilting solar tower system.
Shunpei Yamazaki - One of the best experts on this subject based on the ideXlab platform.
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42‐2: Low Power Consumption 8K Liquid Crystal Display with Oxide Semiconductor/Oxide Conductor Pixel (Transparent Pixel)
SID Symposium Digest of Technical Papers, 2017Co-Authors: Manabu Sato, Daisuke Kurosaki, Yasutaka Nakazawa, Kenichi Okazaki, Junichi Koezuka, Kazunori Watanabe, Koji Kusunoki, Tetsuji Ishitani, Kei Takahashi, Shunpei YamazakiAbstract:We developed a large ultra-high-definition (8K) liquid crystal display with a high Aperture Ratio by making the source and drain electrodes, wirings, storage capacitors, and contact portions transparent. This increased the Aperture Ratio from 37.3% to 47.1% and reduced the backlight power consumption by approximately 21%.
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44 3 513 ppi liquid crystal display using c axis aligned crystalline oxide semiconductor with narrow bezel and Aperture Ratio greater than 50
SID Symposium Digest of Technical Papers, 2014Co-Authors: Kouhei Toyotaka, Jun Koyama, Shunpei Yamazaki, Hiroyuki Miyake, Makoto Kaneyasu, Akio Yamashita, Mika Jikumaru, Masahiko Hayakawa, Masahiro Katayama, Yohsuke KanzakiAbstract:An ultra-high resolution 513-ppi liquid crystal display with a narrow 1-mm bezel and an Aperture Ratio greater than 50% was fabricated. A highly reliable channel-etched c-axis aligned crystalline oxide semiconductor (CAAC-OS) was used in a backplane.
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76 1 high Aperture Ratio lcd display using in ga zn oxide tfts without storage capacitor
SID Symposium Digest of Technical Papers, 2010Co-Authors: Hideaki Shishido, Kouhei Toyotaka, Masashi Tsubuku, Kousei Noda, Hiroki Ohara, Takeshi Nishi, Koji Moriya, Hiromichi Godo, Jun Koyama, Shunpei YamazakiAbstract:By using oxide semiconductors, we succeeded in prototyping a 3.4-inch QHD LCD panel whose Aperture Ratio is high and pixels do not include a storage capacitor. The Aperture Ratio is increased from 40 % to 59%, resulting in reduction of power consumption in a backlight unit.
Hany Aziz - One of the best experts on this subject based on the ideXlab platform.
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Small feature sizes and high Aperture Ratio organic light-emitting diodes by using laser-patterned polyimide shadow masks
Applied Physics Letters, 2014Co-Authors: Yoshitaka Kajiyama, Kevin Joseph, Koichi Kajiyama, Shuji Kudo, Hany AzizAbstract:A shadow mask technique capable of realizing high resolution (>330 pixel-per-inch) and ∼100% Aperture Ratio Organic Light-Emitting Diode (OLED) full color displays is demonstrated. The technique utilizes polyimide contact shadow masks, patterned by laser ablation. Red, green, and blue OLEDs with very small feature sizes (
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small feature sizes and high Aperture Ratio organic light emitting diodes by using laser patterned polyimide shadow masks
Applied Physics Letters, 2014Co-Authors: Yoshitaka Kajiyama, Kevin Joseph, Koichi Kajiyama, Shuji Kudo, Hany AzizAbstract:A shadow mask technique capable of realizing high resolution (>330 pixel-per-inch) and ∼100% Aperture Ratio Organic Light-Emitting Diode (OLED) full color displays is demonstrated. The technique utilizes polyimide contact shadow masks, patterned by laser ablation. Red, green, and blue OLEDs with very small feature sizes (<25 μm) are fabricated side by side on one substrate. OLEDs fabricated via this technique have the same performance as those made by established technology. This technique has a strong potential to achieve high resolution OLED displays via standard vacuum deposition processes even on flexible substrates.
Kei-hsiung Yang - One of the best experts on this subject based on the ideXlab platform.
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62.4: Development of Zigzag Thin‐Film‐Transistor‐Driven OCB for Field‐Sequential‐Color LCDs with High Aperture Ratio
SID Symposium Digest of Technical Papers, 2008Co-Authors: Chao-hui Wu, Po-sheng Shih, Sweehan J. H. Yang, Po-yang Chen, Tsu-chiang Chang, Chien-yung Cheng, Kei-hsiung YangAbstract:For the first time, we have developed a field-sequential 3.5″ VGA zigzag TFT-driven OCB prototype that the splay-to-bend transition of the OCB LC was initiated by zigzag TFTs to enable a design of 64.5%-Aperture Ratio. We also optimize the light transmittance through the OCB LC medium to obtain a total panel transmittance of 15.2 % by a novel driving scheme. The prototype shows a wide color gamut of 125 % NTSC by using scanning LED backlights.
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P‐142: Design of Electrode Structure for AS”‐IPS Mode with High Aperture Ratio and Low Crosstalk
SID Symposium Digest of Technical Papers, 2006Co-Authors: Po-sheng Shih, Kei-hsiung Yang, Shu-hsia ChenAbstract:In a previous publication, we have investigated the Advanced Super'-IPS (AS”-IPS) structure to obtain higher Aperture Ratio and low crosstalk. In this paper, we propose a novel electrode structure, named AS”-IPS, to reduce the thickness of the organic layer used in AS”-IPS for higher manufacture yield and lower manufacture cost.
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A high‐Aperture‐Ratio and low‐crosstalk pixel structure design for in‐plane‐switching‐mode TFT‐LCDs
Journal of The Society for Information Display, 2004Co-Authors: Kei-hsiung Yang, Shu-hsia ChenAbstract:The TFT-LCD market is growing rapidly, and the replacement of CRT TV by LCD TV requires the implementation of LC modes with wide viewing angles and high brightness. The IPS mode is an excellent technology to realize wide viewing angles, but it has a low Aperture Ratio that has now been improved by Advanced Super-IPS (AS-IPS). In this paper, we propose a novel pixel structure design that not only increases the Aperture Ratio but also reduces the crosstalk. We have improved the current AS-IPS Aperture Ratio by 1.25 times and effectively reduced the capacitive coupling Ratio from 1.2% to 0.05%.
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High-transmittance pixel- and common-electrode structures design for in-plane switching mode with low crosstalk
Japanese Journal of Applied Physics, 2004Co-Authors: Kei-hsiung Yang, Shu-hsia ChenAbstract:The replacement of cathode ray tube (CRT) by thin-film-transistor liquid-crystal display (TFT-LCD) in TV applications requires the implementation of LC modes with wide viewing angles and excellent video display quality. Although the in-plane switching (IPS) mode has been known as an excellent technology for realizing wide viewing angles, it has a low Aperture Ratio that has been improved by Advanced Super-IPS (AS-IPS). In this paper, we propose a novel electrode structure that not only increases substantially the Aperture Ratio of the current AS-IPS but also reduces the crosstalk in terms of a capacitive coupling Ratio from 1.2% to 0.05%.
Aldo Di Carlo - One of the best experts on this subject based on the ideXlab platform.
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laser patterning engineering for perovskite solar modules with 95 Aperture Ratio
IEEE Journal of Photovoltaics, 2017Co-Authors: Alessandro Lorenzo Palma, Fabio Matteocci, Antonio Agresti, Sara Pescetelli, Emanuele Calabrò, Luigi Vesce, Silke Christiansen, Michael Schmidt, Aldo Di CarloAbstract:Small area hybrid organometal halide perovskite based solar cells reached performances comparable to the multicrystalline silicon wafer cells. However, industrial applications require the scaling-up of devices to module-size. Here, we report the first fully laser-processed large area (14.5 cm2) perovskite solar module with an Aperture Ratio of 95% and a power conversion efficiency of 9.3%. To obtain this result, we carried out thorough analyses and optimization of three laser processing steps required to realize the serial interconnection of various cells. By analyzing the statistics of the fabricated modules, we show that the error committed over the projected interconnection dimensions is sufficiently low to permit even higher Aperture Ratios without additional efforts.
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Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio
IEEE Journal of Photovoltaics, 2017Co-Authors: Alessandro Lorenzo Palma, Fabio Matteocci, Antonio Agresti, Sara Pescetelli, Emanuele Calabrò, Luigi Vesce, Silke Christiansen, Michael Schmidt, Aldo Di CarloAbstract:Small area hybrid organometal halide perovskite based solar cells reached performances comparable to the multicrystalline silicon wafer cells. However, industrial applications require the scaling-up of devices to module-size. Here, we report the first fully laser-processed large area (14.5 cm2) perovskite solar module with an Aperture Ratio of 95% and a power conversion efficiency of 9.3%. To obtain this result, we carried out thorough analyses and optimization of three laser processing steps required to realize the serial interconnection of various cells. By analyzing the statistics of the fabricated modules, we show that the error committed over the projected interconnection dimensions is sufficiently low to permit even higher Aperture Ratios without additional efforts.