Focus detection apparatus

摘要

A focus detection apparatus for performing phase difference detection type focus detection includes sensor units each configured to generate a signal used for detecting a phase difference, a setting unit configured to set one or more sensor units as determination targets, a determination unit configured to sequentially select a sensor unit from the determination targets, and repeatedly determine whether a signal generated by the selected sensor unit satisfies a termination condition of having a peak value greater than a threshold, and a detection unit configured to perform focus detection using the signal that satisfies the termination condition. The apparatus operates in a first mode and then shift to a second mode. The setting unit includes, in the determination targets in the second mode, a sensor unit that is not included in the determination targets in the first mode.

主权项

1. A focus detection apparatus for performing phase difference detection type focus detection, comprising:
a plurality of sensor units each including a plurality of pixels, each sensor unit being configured to generate a plurality of signals from the plurality of pixels to be used for detecting a phase difference; a setting unit configured to set, from among the plurality of sensor units, one or more sensor units as determination targets, the setting unit including a control line to convey a selection signal for selecting a sensor unit from the determination targets that outputs a signal; and a determination unit including a comparator configured to compare a peak value of the plurality of signals with a first threshold, the determination unit being configured to, using the comparator, determine repeatedly whether a signal generated by the sensor unit selected by the setting unit satisfies a termination condition at which the peak value is greater than the first threshold, wherein the focus detection apparatus is configured to operate in a first mode and then shift to a second mode, and the setting unit is configured to include, in the determination targets in the second mode, a sensor unit that is not included in the determination targets in the first mode, but not to include, in the determination targets in the second mode, a sensor unit whose peak value has been determined to be greater than the first threshold in the first mode.