Imaging device and automatic focus adjustment method

Abstract

The present invention provides an imaging device which uses a mixed color having an angle dependency from an adjacent R pixel; when an object color is red, first and second B pixels are used as phase difference pixels so that the phase difference AF can be accurately performed on the basis of the output signals of the first and second B pixels. Further, an exclusive phase difference pixel does not need to be provided when the object color is red and the phase difference is detected by using the normal B pixel of an imaging element, and thus resolution will not be sacrificed therefor.

Description

technical field [0001] The present invention relates to an imaging device and an automatic focusing method, and more particularly, to an imaging device and an automatic focusing method for automatically adjusting the focus by detecting a phase difference of captured signals. Background technique [0002] Conventionally, an automatic focus (phase difference AF) is known in which first and second phase difference pixels are provided in a part of an imaging device, and a phase difference between output signals of the first and second phase difference pixels is detected, and based on the detected The resulting phase difference adjusts the focus position of the focusing lens. [0003] When the first and second phase difference pixels are provided in part of the imaging element, there is a problem that focus detection accuracy is reduced due to the influence of crosstalk from other pixels of different colors adjacent to the first and second phase difference pixels. [0004] In or...

AI Technical Summary

Problems solved by technology

[0010] The phase difference pixel described in Patent Document 1 is a white pixel having a spectral sensitivity characteristic obtained by adding the spectral sensitivity characteristics of RGB pixels, and the phase difference pixel described in Patent Document 2 is a G pixel. Crosstalk correction is performed on the output signals of these phase difference pixels, and even when the subject is very red and the color temperature is low, the signal output required for accurate phase difference detection cannot be obtained, and accurate phase difference cannot be performed. AF

Images