A bunch of new patents for phase-difference AF have appeared. They look to be related to mirrorless and EVF applications.
Patent Publication No. 2015-22264 (Google Translated)
- Published 2015.2.2
- Filing date 2013.7.23
- Phase difference detection method to be received by the AF sensor can be reflected incident light from the imaging lens
- The phase difference detection by the image plane phase difference AF
- The phase difference detection by external light AF sensor