Method for integrating image sensor
View Patent ↗Disclosed is a method for integrating an image sensor capable of removing a flicker noise without causing any burdens on a hardware due to setting up additional logics. The method for integrating an exposure time of an image sensor employing a line scan method, including the steps of: performing an integration to a first line when an integer multiple of a light source frequency is different from an integration time; and performing an integration to a second line at a phase substantially equal to a phase in which the integration to the first line is started.
1. A method for integrating an exposure time of an image sensor employing a line scan method to remove flicker noise, comprising the steps of:
performing an integration to a first line when an integer multiple of a light source frequency is different from an integration time; and
performing an integration to a second line at a phase substantially equal to a phase in which the integration to the first line is started
wherein when the frequency of the light source is an integer multiple of 50 Hz and the integration time is an integer multiple of 1/(60 Hz), the integration is paused for 1/(an integer multiple of 50) to 1/(an integer multiple of 60) after completing the integration to the first line and then, the integration to the second line is performed,
wherein when the frequency of the light source is an integer multiple of 60 Hz and the integration time is an integer multiple of 1/(50 Hz), the integration is paused for 2/(an integer multiple of 60) to 1/(an integer multiple of 50) after completing the integration to the first line and then, the integration to the second line is performed.
2. A method for integrating an image sensor using a line type scan to remove flicker noise, comprising the steps of:
performing an integration to a first line;
comparing an integration time with an integer multiple of a frequency of a light source;
delaying an integration to a second line until a phase of the second line is substantially identical with a phase of the frequency of the light source started from the integration to the first line as the integer multiple of the frequency of the light source and the integration time are different from each other as a result of the comparison; and
performing the integration to the second line in the phase which is substantially identical with the phase of the frequency of the light source started from the integration to the first line
wherein when the frequency of the light source is an integer multiple of 50 Hz and the integration time is 1/(an integer multiple of 60 Hz), the integration is paused for 1/(an integer multiple of 50) to 1/(an integer multiple of 60) after completing the integration to the first line and then, the integration to the second line is performed,
wherein when the frequency of the light source is an integer multiple of approximately 60 Hz and the integration time is 1/(an integer multiple of 50 Hz), the integration is paused for 2/(an integer multiple of 60) to 1/(an integer multiple of 50) after completing the integration to the first line and then, the integration to the second line is performed.
3. The method of claim 2 , wherein as a result of the comparing the integer multiple of the frequency of the light source with the integration time, the integration to the second line is performed after a predetermined time as the integer multiple of the frequency of the light source is identical with the integration time.