IMAGING DEVICE AND IMAGING METHOD

摘要

A unit group which is formed by pixel cell rows L1, L2, L1A, and L2A is divided into groups BG1 and BG2. The defocus amount calculating unit calculates a phase difference of the output signal group of the phase difference detecting pixel cells 51R with respect to the output signal group of the phase difference detecting pixel cells 51L for BG1, calculates a phase difference of the output signal group of the phase difference detecting pixel cells 51L with respect to the output signal group of the phase difference detecting pixel cells 51R for BG2, and calculates a defocus amount based on a difference between the two calculated phase differences. The driving unit performs exposure in the order of the pixel cell rows L1 and L2 for BG1 and performs exposure in the order of the pixel cell rows L2A and L1A for BG2.

主权项

1. An imaging device, comprising:
an imaging element which includes
a plurality of first pixel cell rows which includes a plurality of first pixel cells which receives one of a pair of luminous fluxes passing through different regions of a pupil area of a photographing optical system to output signals in accordance with an amount of received light and is arranged with a predetermined interval in a row direction anda plurality of second pixel cell rows which includes a plurality of second pixel cells which receives the other one of the pair of luminous fluxes to output signals in accordance with an amount of received light and is arranged with the predetermined interval in the row direction, the first pixel cell rows and the second pixel cell rows being alternately arranged in a column direction which is perpendicular to the row direction, a driving unit which drives to shift exposure periods of the pixel cell rows, respectively and read out signals output from the first pixel cells or the second pixel cells which are included in each pixel cell row in accordance with the amount of received light during the exposure periods; a defocus amount calculating unit which calculates a defocus amount using the output signals of the first pixel cells and the output signals of the second pixel cells; and a focus control unit which controls a focus state of the photographing optical system based on the defocus amount calculated by the defocus amount calculating unit, wherein the pixel cell rows which are arranged in the column direction are divided into groups having the same number of first pixel cell rows and second pixel cell rows as groups each of which includes n (n is an even number) pixel cell rows which are continuously arranged in the column direction, and the driving unit drives to initiate the exposure of two adjacent pixel cell rows in one of two groups which are continuously arranged in the column direction in a reverse order to an order of initiation of the exposure of two pixel cell rows which are disposed at corresponding positions in the other one of the two groups.