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    • 1. 发明授权
    • Capacitance detecting apparatus and its inspecting method and fingerprint checking apparatus
    • 电容检测装置及其检查方法和指纹检查装置
    • US06681033B1
    • 2004-01-20
    • US09439084
    • 1999-11-12
    • Motoyasu YanoMasashi TakedaTakeshi KoyamaKeiichi Shinozaki
    • Motoyasu YanoMasashi TakedaTakeshi KoyamaKeiichi Shinozaki
    • G06K928
    • G01D5/2417G01D5/24G01D5/2405G06K9/0002
    • When a current charge method is used as a method of detecting capacitance, there poses a problem in which S/N is deteriorated by a dispersion in element characteristics of a cell to be detected and when a voltage charge method is used, since parasitic capacitances of column sense lines are very large and accordingly, there is needed some devise for sampling electric charge charged to the capacitance. There are arranged unit cells having detection electrodes and cell selecting switches connected between the detection electrodes and column sense lines in an array shape, electric charge is charged from detecting circuits to the detection electrodes under constant charge voltage, and thereafter, the column sense lines are imaginarily grounded to thereby detect the capacitances formed between the detection electrodes and the surface of the finger in accordance with recesses and projections of a fingerprint via the column sense lines.
    • 当使用当前的充电方法作为检测电容的方法时,存在由于要检测的单元的元件特性的色散而导致S / N恶化的问题,并且当使用电压充电方法时,由于寄生电容 列检测线非常大,因此,需要一些用于对充电到电容的电荷进行采样的设备。 布置了具有检测电极和单元选择开关的单位单元,其以检测电极和列感测线为阵列形状,在恒定的充电电压下从检测电路向检测电极充电,之后,列感测线为 通过接地,通过经由列感测线路的指纹的凹凸来检测检测电极与手指的表面之间形成的电容。
    • 2. 发明授权
    • Electrostatic capacity detection apparatus and fingerprint crosscheck apparatus using the same
    • 静电容量检测装置和使用其的指纹交叉检查装置
    • US06937031B2
    • 2005-08-30
    • US10363547
    • 2002-07-03
    • Masaki YoshiokaMotoyasu YanoKeiichi Shinozaki
    • Masaki YoshiokaMotoyasu YanoKeiichi Shinozaki
    • G01B7/28A61B5/117G01B7/34G06K9/00G06T1/00G01R27/26
    • G06K9/0002G06K9/00087
    • A capacitance sensor used as a fingerprint sensor is provided which includes, in addition to a sensor array (11) in which sensor cells (100) each with a sense electrode are disposed in the form of an array, a canceling dummy block (14) having, disposed in an area having no relation with any object under detection, one column of dummy cells (141) corresponding to each row in the sensor array (11) and each having a dummy electrode nearly identical in parasitic capacitance to the sense electrode of the sensor cell (100). Also, a differentiation output unit (183) is provided to differentiate between a sensed voltage Vsig sensed at the sensor array (11) by sensing circuit (13) and sensed voltage Vdmy sensed at the canceling dummy block (14), thereby eliminating the influence of a variation in parasitic capacitance Cp, caused by a production tolerance.
    • 提供了一种用作指纹传感器的电容传感器,除了具有感测电极的传感器单元(100)以阵列的形式设置的传感器阵列(11)之外,还包括消除模块(14) 具有设置在与检测中的任何物体无关的区域中的与传感器阵列(11)中的每一行相对应的一列虚拟单元(141),并且每个虚拟单元具有与所述传感器阵列(11)的感测电极的寄生电容几乎相同的虚拟电极 传感器单元(100)。 此外,提供微分输出单元(183)以通过感测电路(13)感测在传感器阵列(11)处感测的感测电压Vsig与在消除伪块(14)处感测到的感测电压Vdmy之间的差异,从而消除影响 由生产公差引起的寄生电容Cp的变化。
    • 7. 发明授权
    • Image verification system and method using residual fingerprint detection
    • 图像验证系统和方法使用残留指纹检测
    • US07440596B2
    • 2008-10-21
    • US10859291
    • 2004-06-03
    • Satoru KondoKeiichi Shinozaki
    • Satoru KondoKeiichi Shinozaki
    • G06K9/00G06K9/62G06K9/74B42D15/00
    • G06K9/00087
    • An image verification system including a fingerprint sensing means for sensing a fingerprint; an image data storing means for storing image data of the fingerprint sensed by the fingerprint sensing means as first image data; and a residual fingerprint judging means for comparing second image data of a fingerprint newly sensed by the fingerprint sensing means with the first image data stored by the image data storing means, and judging whether or not the second image data indicates a residual fingerprint, wherein the residual fingerprint judging means judges that the second image data indicates a residual fingerprint and does not verify the fingerprint when said first image data and the second image data match, while judges that the second image data is not a residual fingerprint and verifies the fingerprint when the first image data and the second image data do not match, whereby a fingerprint can be verified with a high precision without erroneously detecting a residual fingerprint.
    • 一种图像验证系统,包括用于感测指纹的指纹感测装置; 图像数据存储装置,用于存储由指纹感测装置感测的指纹的图像数据作为第一图像数据; 以及残留指纹判断装置,用于将由指纹感测装置新感测的指纹的第二图像数据与由图像数据存储装置存储的第一图像数据进行比较,并且判断第二图像数据是否指示残留指纹,其中, 剩余指纹判断装置判断第二图像数据指示残留指纹,并且当所述第一图像数据和第二图像数据匹配时,不会验证指纹,同时判断第二图像数据不是残留指纹,并且当 第一图像数据和第二图像数据不匹配,从而可以以高精度验证指纹,而不会错误地检测到残留指纹。