METHOD OF ADAPTIVELY REDUCING POWER CONSUMPTION AND AN IMAGE SENSOR THEREOF

摘要

A method of adaptively reducing power consumption in an image sensor includes using an electronic rolling shutter to reset pixels of the image sensor row by row. Signal charges are read out from the pixels row by row, followed by obtaining an integration time and a frame height. A power-saving signal is generated when the integration time is substantially greater than the frame height, and at least a circuitry that is not required to operate during an active period of the power-saving signal is turned off.

主权项

1. A method of adaptively reducing power consumption in an image sensor, the method comprising:
using an electronic rolling shutter to reset pixels of the image sensor row by row; reading out signal charges from the pixels row by row; obtaining an integration time and a frame height, the integration time representing a time required to collect signal charge from a photo sensor of the pixel in response to illumination of an incident light; comparing the integration time with the frame height; generating a power-saving signal when the integration time is substantially greater than the frame height; and turning off at least a circuitry that is not required to operate during an active period of the power-saving signal.