Epson has himself announced as the supplier of the panel for the evf in the new E-M5 m4/3 camera from Olympus. The Ultimicron lcd Epson features to 1.44 million subpixels and uses a rgb color filter.
Epson mentions as a benefit of the rgb-structure of its Ultimicron panel that in contrast to, for example, the ‘frame-sequential’technology, which Panasonic for evf’s, no so-called color breakup that occurs with fast moving images or the fast movement of the eyes in the viewfinder.
Epson has the Ultimicron displays already since 2009 in its range and the technology is a further development of Epson display technology for video projectors. Sony makes the Sony Alpha A77-, A65 and NEX-7 cameras, incidentally, use of an oled display with 2,44 million subpixels for the built-in viewfinder.