公开(公告)号：JP2000032351A

公开(公告)日：2000-01-28

申请号：JP15104099

申请日：1999-05-31

Applicant: MOTOROLA INC

Inventor： STEVEN M DOMER ,  JEFFREY E BILS

IPC: H04N5/14 ,  H04N5/217 ,  H04N5/228 ,  H04N5/335 ,  H04N5/357 ,  H04N5/363 ,  H04N5/365 ,  H04N5/367 ,  H04N5/369 ,  H04N5/378

Abstract: PROBLEM TO BE SOLVED: To provide an improved image pickup system capable of compensating different responses to light rays at the different areas of an optical sensor. SOLUTION: In this image pickup system 10, the different amplitudes of pixel signals generated by optical active elements in the optical sensor 32 whose response to projected light is not uniform are compensated. The sensor is divided into area groups 52 so as to practically equalize the responses of optical active elements in the area. When the pixel signals generated in different areas are received, a processing circuit 34 compensates the different responses at the different area through a programmable gain amplifier 72 for dynamically controlling the gain.