Patent ID: 9568607
Date: 2017-02-14
CPC Classifications: G01S

Claim:
1. A method of operating a depth sensor, the method comprising: generating a first photo gate signal and second through fourth photo gate signals respectively having 90-, 180- and 270-degree phase differences from the first photo gate signal; applying the first photo gate signal and the third photo gate signal to a first row of a pixel array and the second photo gate signal and the fourth photo gate signal to a second row adjacent to the first row in a first frame using a first clock signal; and applying the first photo gate signal and the third photo gate signal to a first column of the pixel array and the second photo gate signal and the fourth photo gate signal to a second column adjacent to the first column in a second frame using a second clock signal, wherein a frequency of the first clock signal is different from a frequency of the second clock signal.