Universal Display developed a new AMOLED structure that is a sort of WOLED - RGB hybrid structure. The idea is to use a large blue sub-pixel and a large yellow sub-pixel that is split into three areas - unfiltered and red and green filtered.
This structure is easier to deposit compared to a true RGB AMOLED (that requires very fine patterning of red, green and blue subpixels) but increase the aperture ratio compared to a WOLED architecture (which LG for example uses in its OLED TVs) - which increases the lifetime and color gamut of the display.
As you can see in the image above, deposition uses a "smart" mask openings that deposits several subpixels at once - but not on the same pixel. This sounds like an interesting innovation.
Posted: May 10,2016 by Ron Mertens