Patent ID: 9578228
Date: 2017-02-21
CPC Classifications: H01L,H04N

Claim:
1. A focus detection apparatus which performs focus detection of a phase difference method by using signals from an image pickup element including a first pixel and a second pixel sharing one micro lens, the focus detection apparatus comprising: a signal separating portion configured to sequentially input a first signal obtained from the first pixel and a third signal that is an added signal of the first signal and a second signal obtained from the second pixel and separate the first signal and the third signal; a first saturation detector configured to detect saturation of the first signal; a second saturation detector configured to detect saturation of the second signal; a luminance generating portion configured to generate luminance signals of the first signal and the second signal after a saturation process of the first signal and the second signal is performed; and a processor configured to perform a correlation calculation based on the luminance signals.