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    • 9. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20090135449A1
    • 2009-05-28
    • US12277452
    • 2008-11-25
    • Takeshi WatanabeNobuhiko NakaharaShigeru FujiwaraHiroyuki Okuyama
    • Takeshi WatanabeNobuhiko NakaharaShigeru FujiwaraHiroyuki Okuyama
    • H04N1/60
    • H04N1/4078H04N1/6033H04N1/6091
    • An image forming apparatus includes a pattern formation unit which forms a first gradation screen pattern on an image carrier unit at a non-image formation operation, a gradation characteristic determination unit which determines a gradation characteristic from the first gradation pattern formed by the pattern formation unit, a first gradation correction characteristic determination unit which determines a first gradation correction characteristic from the gradation characteristic determined by the gradation characteristic determination unit, a characteristic detection unit which detects a change characteristic in the image forming apparatus just before image formation, a pattern correlation characteristic correction unit which determines a pattern correlation characteristic corresponding to the change characteristic detected by the characteristic detection unit and a second gradation correction characteristic determination unit which determines a second gradation correction characteristic by performing an arithmetic operation on the first gradation correction characteristic and the pattern correlation characteristic.
    • 图像形成装置包括在非图像形成操作下在图像载体单元上形成第一灰度级屏幕图案的图案形成单元,灰度特性确定单元,其从由图案形成单元形成的第一灰度图案确定灰度特性 第一灰度校正特性确定单元,其根据由灰度特性确定单元确定的灰度特性确定第一灰度校正特性;特征检测单元,其检测在图像形成之前的图像形成装置中的变化特性,图案相关特性 确定对应于由特征检测单元检测到的变化特征的图案相关特性的校正单元和确定第二灰度校正特性的第二灰度校正特性确定单元 对第一灰度校正特性和图案相关特性进行算术运算。
    • 10. 发明申请
    • Gan-Based Light-Emitting Element and Method for Producing Same
    • 赣基发光元件及其制作方法
    • US20080048195A1
    • 2008-02-28
    • US11813736
    • 2005-12-26
    • Hiroyuki OkuyamaGoshi Biwa
    • Hiroyuki OkuyamaGoshi Biwa
    • H01L33/00H01L21/00
    • H01L33/0079H01L33/007H01L33/14H01L33/16
    • A GaN-based semiconductor light-emitting element capable of suppressing the occurrence of piezoelectric spontaneous polarization in the thickness direction of an active layer and reducing the driving voltage of a light-emitting diode is provided. The GaN-based semiconductor light-emitting element has a structure with a first GaN-based compound semiconductor layer 21 having the top face parallel to the a-plane and having a first conductivity type, an active layer 22 having the top face parallel to the a-plane, a second GaN-based compound semiconductor layer 23 having the top face parallel to the a-plane and having a second conductivity type, and a contact layer 24 composed of a GaN-based compound semiconductor and having the top face parallel to the a-plane, stacked in that order. The GaN-based semiconductor light-emitting element further includes a first electrode 25 disposed on the first GaN-based compound semiconductor layer 21 and a second electrode 26 disposed on the contact layer 24.
    • 提供了能够抑制有源层的厚度方向上的压电自发极化的发生并且降低发光二极管的驱动电压的GaN基半导体发光元件。 GaN基半导体发光元件具有第一GaN基化合物半导体层21的结构,该第一GaN基化合物半导体层21的顶面平行于a面并具有第一导电类型,有源层22的顶面平行于 a面,具有与a面平行并具有第二导电类型的第二GaN基化合物半导体层23和由GaN基化合物半导体构成的接触层24,并且其顶面平行于 a平面,按顺序堆叠。 GaN基半导体发光元件还包括设置在第一GaN基化合物半导体层21上的第一电极25和设置在接触层24上的第二电极26。