公开(公告)号：US09843753B2

公开(公告)日：2017-12-12

申请号：US14930099

申请日：2015-11-02

Applicant: OmniVision Technologies, Inc.

Inventor： Tianjia Sun ,  Chun-Ming Tang ,  Jingyi Liu ,  Xin Hu

IPC: H04N3/14 ,  H04N5/369 ,  H02M3/156 ,  H04N5/232 ,  G03B7/26

CPC classification number: H04N5/3698 ,  G03B7/26 ,  H02M3/156 ,  H04N5/23241

Abstract: An imaging system includes an image sensor and a row-period compensator. The image sensor includes an array of photosensitive pixels and electrical circuitry for controlling the array of photosensitive pixels and for reading accumulated electrical charge therefrom. The electrical circuitry is at least partially powered from a positive power rail and a negative power rail. The row-period compensator is for compensating for a change in current drawn by the electrical circuitry during at least part of a row-period of the image sensor, and the row-period compensator is electrically coupled between the positive and negative power rails. A method for compensating for a change in current drawn by electrical circuitry of an image sensor includes controlling a magnitude of compensation current drawn by a row-period compensator, to compensate for a change in current drawn by the electrical circuitry of the image sensor.

公开(公告)号：US20170127003A1

公开(公告)日：2017-05-04

申请号：US14930099

申请日：2015-11-02

Applicant: OmniVision Technologies, Inc.

Inventor： Tianjia Sun ,  Chun-Ming Tang ,  Jingyi Liu ,  Xin Hu

IPC: H04N5/378 ,  H04N5/376 ,  H04N5/225

CPC classification number: H04N5/3698 ,  G03B7/26 ,  H02M3/156 ,  H04N5/23241

Abstract: An imaging system includes an image sensor and a row-period compensator. The image sensor includes an array of photosensitive pixels and electrical circuitry for controlling the array of photosensitive pixels and for reading accumulated electrical charge therefrom. The electrical circuitry is at least partially powered from a positive power rail and a negative power rail. The row-period compensator is for compensating for a change in current drawn by the electrical circuitry during at least part of a row-period of the image sensor, and the row-period compensator is electrically coupled between the positive and negative power rails. A method for compensating for a change in current drawn by electrical circuitry of an image sensor includes controlling a magnitude of compensation current drawn by a row-period compensator, to compensate for a change in current drawn by the electrical circuitry of the image sensor.