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Aperture Ratio

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Graham J Nathan – One of the best experts on this subject based on the ideXlab platform.

  • 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, 2019
    Co-Authors: Alfonso Chinnici, Mehdi Jafarian, Maziar Arjomandi, Bassam B Dally, Graham J Nathan

    Abstract:

    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.

  • 42‐2: Low Power Consumption 8K Liquid Crystal Display with Oxide Semiconductor/Oxide Conductor Pixel (Transparent Pixel)
    SID Symposium Digest of Technical Papers, 2017
    Co-Authors: Manabu Sato, Daisuke Kurosaki, Yasutaka Nakazawa, Kenichi Okazaki, Junichi Koezuka, Kazunori Watanabe, Koji Kusunoki, Tetsuji Ishitani, Kei Takahashi, Shunpei Yamazaki

    Abstract:

    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%.

  • 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, 2014
    Co-Authors: Kouhei Toyotaka, Shunpei Yamazaki, Jun Koyama, Hiroyuki Miyake, Makoto Kaneyasu, Akio Yamashita, Mika Jikumaru, Masahiko Hayakawa, Masahiro Katayama, Yohsuke Kanzaki

    Abstract:

    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.

  • 76 1 high Aperture Ratio lcd display using in ga zn oxide tfts without storage capacitor
    SID Symposium Digest of Technical Papers, 2010
    Co-Authors: Hideaki Shishido, Kouhei Toyotaka, Masashi Tsubuku, Kousei Noda, Hiroki Ohara, Takeshi Nishi, Koji Moriya, Hiromichi Godo, Jun Koyama, Shunpei Yamazaki

    Abstract:

    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.

  • Small feature sizes and high Aperture Ratio organic light-emitting diodes by using laser-patterned polyimide shadow masks
    Applied Physics Letters, 2014
    Co-Authors: Yoshitaka Kajiyama, Kevin Joseph, Koichi Kajiyama, Shuji Kudo, Hany Aziz

    Abstract:

    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 (

  • small feature sizes and high Aperture Ratio organic light emitting diodes by using laser patterned polyimide shadow masks
    Applied Physics Letters, 2014
    Co-Authors: Yoshitaka Kajiyama, Kevin Joseph, Koichi Kajiyama, Shuji Kudo, Hany Aziz

    Abstract:

    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.