Patent ID: 9083881
Filing Date: 2015-07-14
Classification: H04N

Abstract:
1. A focus adjustment apparatus comprising: a focus lens; a focus lens driver configured to drive the focus lens in an optical axis direction; an image pickup unit configured to generate an image signal by converting image light incident through the focus lens into an electrical signal; a determiner configured to determine at least one condition; a focus area setting unit configured to set a focus area in a shape of which a width of an upper part is narrower than a lower part according to the determined condition; and a controller configured to control movement of the focus lens to adjust a focus on an image signal corresponding to the set focus area; an Auto Focus (AF) evaluation value deriver configured to derive a plurality of AF evaluation values using image signals respectively corresponding to a plurality of focus lens positions; and a peak value determiner configured to determine a peak AF evaluation value according to the AF evaluation values; wherein the determining a condition includes determining whether the peak AF evaluation value is low by comparing the peak AF evaluation value to a reference peak value, and the focus area setting unit sets a first focus area if the peak AF evaluation value is not low and sets a second focus area, which is greater than the first focus area and has a shape of which a width of an upper part is narrower than a lower part, if the peak AF evaluation value is low.