| 摘要 |
PURPOSE: An image sensor for detecting bad pixels is provided to detect various bad pixels and perform easily a compensating process for corresponding bad pixels by using a test structure. CONSTITUTION: A pixel array(10) is arrayed by unit pixels having columns of N number and lines of M number. The pixel array(10) is used for detecting image information received from the outside. A detection portion(11) is connected with each column line of the pixel array(10). The detection portion(11) detects bad pixels by comparing a variation of voltage in the column line with a predetermined input value. In addition, the detection portion(11) stores location information of the bad pixels. An ADC(Analog to Digital Converter)(12) is used for converting analog data of the detection portion(11) to digital data. A buffer memory(13) is used for storing the digital data. A digital control portion(14) controls operations of an image sensor and an interface with the outside. A bad pixel compensation portion(15) performs a compensating operation for corresponding bad pixels.
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