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    • 2. 发明授权
    • Device for detecting defects in solid-state image sensor
    • 用于检测固态图像传感器缺陷的装置
    • US06307393B1
    • 2001-10-23
    • US08783518
    • 1997-01-14
    • Masayuki Shimura
    • Masayuki Shimura
    • G01R3100
    • H04N5/3675H04N5/23245H04N5/23248H04N5/23251H04N17/002
    • A device for detection of defects in a solid-state image sensor, comprising a timing generator for generating first and second read pulses to read out signal charges of first and second fields respectively from photo sensing elements disposed in the pixels of the image sensor; a controller for controlling the timing of generation of the first and second read pulses; and a defect detector supplied with the signal charges of the first and second fields stored in the image sensor and serving to detect any defective pixel by detecting the level of the signal charge in each pixel. During the defect detection period, the controller controls the timing generator in such a manner that the first read pulse is supplied to the image sensor after storage of the first-field signal charge for a time period of six fields, and also that storage of the second-field signal charge is started after a lapse of two fields from start of the storage of the first-field signal charge, and the second read pulse is supplied to the image sensor after storage of the second-field signal charge, whereby the defect detection can be performed in a time period of four fields.
    • 一种用于检测固态图像传感器中的缺陷的装置,包括定时发生器,用于产生第一和第二读取脉冲,以分别从设置在图像传感器的像素中的感光元件读出第一和第二场的信号电荷; 用于控制产生第一和第二读取脉冲的定时的控制器; 以及缺陷检测器,其被提供有存储在图像传感器中的第一和第二场的信号电荷,并且用于通过检测每个像素中的信号电荷的电平来检测任何缺陷像素。 在缺陷检测周期期间,控制器以这样的方式控制定时发生器,使得在存储第一场信号电荷六个场的时间段之后,第一读取脉冲被提供给图像传感器,并且还存储 在从开始第一场信号电荷的开始经过两个场之后开始第二场信号电荷,并且在存储第二场信号电荷之后第二读取脉冲被提供给图像传感器,由此缺陷 可以在四个场的时间段内执行检测。