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86 条记录 (耗时 0.036 秒)

    Poly(aryletherimides) for negative birefringent films for LCDs
    24.
    发明授权
    Poly(aryletherimides) for negative birefringent films for LCDs 有权
    用于LCD的负双折射膜的聚（芳基酰亚胺）

    公开(公告)号：US07438957B2

    公开(公告)日：2008-10-21

    申请号：US11488929

    申请日：2006-07-18

    申请人： Frank Harris ,  Limin Sun ,  Dong Zhang ,  Stephen Z. D. Cheng

    发明人： Frank Harris ,  Limin Sun ,  Dong Zhang ,  Stephen Z. D. Cheng

    IPC分类号： G02F1/13363

    CPC分类号： C08G73/1039 ,  C08G73/1042 ,  C08G73/1067 ,  C08J5/18 ,  C08J2379/08 ,  G02B5/3083 ,  G02F1/133634 ,  Y10T428/1027 ,  Y10T428/1036 ,  Y10T428/1041 ,  Y10T428/31721

    摘要： A class of soluble poly(aryletherimides) (PAEIs) having flexible backbones, useful in the manufacture of polymeric optical films are disclosed. The poly(aryletherimides) are dissolved in organic solvents, such as ketones and ketone solvent mixtures and coated on variety of substrates such as triacetyl cellulose (TAC), to form clear thin-layer films which display negative birefringence. The thin films can serve as compensation layers in liquid crystal displays (LCDs), and can be combined with other types of optical films, such as polarizers, brightness enhancement films, or other compensation films, to from multi-layered films that are especially useful in the manufacture of LCDs.

    摘要翻译： 公开了一类可用于制造聚合物光学薄膜的可溶性聚（芳基酰亚胺）（PAEI）（PAEI）），其具有柔性主链。 将聚（芳基酰亚胺）溶于有机溶剂如酮和酮溶剂混合物中并涂覆在各种基材如三乙酰纤维素（TAC）上，以形成显示出负双折射的透明薄膜。 薄膜可以用作液晶显示器（LCD）中的补偿层，并且可以与其他类型的光学膜（例如偏振器，亮度增强膜或其他补偿膜）组合到特别有用的多层膜 在LCD的制造中。

    Method and apparatus for shot detection
    27.
    发明申请
    Method and apparatus for shot detection 有权

    公开(公告)号：US20050025358A1

    公开(公告)日：2005-02-03

    申请号：US10930170

    申请日：2004-08-31

    申请人： Wei Qi ,  Dong Zhang

    发明人： Wei Qi ,  Dong Zhang

    IPC分类号： G06K9/00 ,  G06T7/20 ,  G11B27/28 ,  H04N5/14

    CPC分类号： G06K9/00711 ,  G06T7/20 ,  G11B27/28 ,  H04N5/147

    摘要： A system identifies an abrupt transition in content between two frames, and determines whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event. Identification of the abrupt transition in content includes calculating a difference in light intensity histograms between the current frame and a preceding frame, and comparing the histogram difference to a dynamically determined threshold. Further, an average light intensity based method is used to determine whether the abrupt transition was caused by a shot boundary or by a flashlight event.

    Manufacture of prepregs and laminates with relatively low dielectric constant for printed circuit boards
    28.
    发明授权
    Manufacture of prepregs and laminates with relatively low dielectric constant for printed circuit boards 有权
    制造印刷电路板相对低介电常数的预浸料和层压板

    公开(公告)号：US06632511B2

    公开(公告)日：2003-10-14

    申请号：US10035975

    申请日：2001-11-09

    申请人： Dong Zhang

    发明人： Dong Zhang

    IPC分类号： B32B300

    CPC分类号： C08J5/24 ,  H05K1/0366 ,  H05K1/0373 ,  H05K2201/012 ,  H05K2201/0212 ,  Y10T428/24917 ,  Y10T428/249999 ,  Y10T428/253 ,  Y10T428/2933 ,  Y10T442/209 ,  Y10T442/2139 ,  Y10T442/259 ,  Y10T442/2631

    摘要： The present invention is directed to filled prepregs, laminates, printed circuit boards comprising a reinforcing material impregnated with a cured polymeric resin, the cured polymeric resin comprising multicellular polymeric microspheres as a filler. Pre-pregs, laminates and printed circuit boards prepared by this method have reduced dielectric constant as low as 3.0, depending upon the resin system of the matrix. In addition, such laminates and printed circuit boards have enhanced electrical, thermal and mechanical properties as well as improved machinability, low density and a uniform appearance.

    摘要翻译： 本发明涉及填充的预浸料，层压板，印刷电路板，其包含浸渍有固化的聚合物树脂的增强材料，所述固化的聚合物树脂包含多细胞聚合物微球体作为填料。 通过该方法制备的预浸料，层压板和印刷电路板根据基体的树脂体系将介电常数降低到3.0。 此外，这种层压板和印刷电路板具有增强的电，热和机械性能以及改善的机械加工性，低密度和均匀的外观。