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 comprising:
performing an integration of a first line of an image sensor responsive to a reciprocal of a positive integer multiple of a frequency of a light source being different than an integration time; and
performing an integration of a second line at a phase substantially equal to a phase in which the integration of the first line is started,
wherein when the frequency of the light source is a positive integer multiple of 50 Hz and the integration time is a positive integer multiple of 1/120 seconds, said performing the integration to the second line is delayed for 1/(a positive integer multiple of 50) seconds minus 1/(a positive integer multiple of 60) seconds after completing said performing the integration of the first line.
2. The method of claim 1 , wherein when the frequency of the light source is a positive integer multiple of 60 Hz and the integration time is a positive integer multiple of 1/100 seconds, said performing the integration is delayed for 2/(an integer multiple of 60) seconds minus 1/(an integer multiple of 50) seconds after completing said performing the integration of the first line.
3. A method comprising:
integrating a first line of an image sensor, wherein said integrating the first line has a start time corresponding to a first phase of a frequency of a light source;
comparing an integration time with a reciprocal of a positive integer multiple of the frequency of the light source;
if the reciprocal of the positive integer multiple of the frequency of the light source and the integration time are different from each other, delaying a start time for an integration of a second line of the image sensor until a phase of the integration of the second line is substantially identical with the first phase; and
integrating the second line,
wherein said integrating the second line has a start time that is substantially identical to the first phase,
wherein when the frequency of the light source is a positive integer multiple of 50 Hz and the integration time is 1/120 seconds, the integration to the second line is delayed for 1/(a positive integer multiple of 50) seconds minus 1/(a positive integer multiple of 60) seconds after completing the integration of the first line.
4. The method of claim 3 , wherein when the frequency of the light source is a positive integer multiple of approximately 60 Hz and the integration time is 1/100 seconds, the integration to the second line is delayed for 2/(a positive integer multiple of 60) seconds minus 1/(a positive integer multiple of 50) seconds after completing the integration of the first line.
5. A method comprising:
performing integration of a first line of an image sensor beginning at a start time corresponding to a first phase of a frequency of a light source; and
performing integration of a second line of the image sensor beginning at a start time corresponding to a second phase of the frequency of the light source;
wherein the first phase and the second phase are substantially identical,
wherein when the frequency of the light source is a positive integer multiple of 50 Hz and the integration time is a positive integer multiple of 1/120 seconds, a delay of a duration of 1/(a positive integer multiple of 50) seconds minus 1/(a positive integer multiple of 60) seconds occurs between completing said performing integration of the first line and starting said performing integration of the second line.
6. The method of claim 5 , wherein when the frequency of the light source is 100 Hz and the integration time is 1/120 seconds, a delay of a duration of 1/100 seconds minus 1/120 seconds occurs between completing said performing integration of the first line and starting said performing integration of the second line.
7. The method of claim 5 , wherein when the frequency of the light source is a positive integer multiple of 60 Hz and the integration time is a positive integer multiple of 1/100 seconds, a delay of a duration of 2/(a positive integer multiple of 60) seconds minus 1/(a positive integer multiple of 50) seconds occurs between completing said performing integration of the first line and starting said performing integration of the second line.
8. The method of claim 5 , wherein when the frequency of the light source is 120 Hz and the integration time is 1/100 seconds, a delay of a duration of 2/120 seconds minus 1/100 seconds occurs between completing said performing integration of the first line and starting said performing integration of the second line.