Patent ID: 11917318
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. An operation method of an imaging device, comprising the steps of
setting a first voltage and a second voltage (the first voltage<the second voltage) in a pixel;
obtaining first image data of a first frame period;
obtaining second image data of an n-th frame (n is a natural number of 2 or more) period;
calculating a third voltage, which is a difference between the first image data and the second image data; and
comparing the first voltage, the second voltage, and the third voltage,
wherein the second image data is not read out from the pixel when the third voltage is greater than the first voltage and less than the second voltage, and
wherein the second image data is read out from the pixel when the third voltage is less than the first voltage or the third voltage is greater than the second voltage.