http://www.oled-info.com/lg-introduce-3-stack-structure-its-2017-oled-lighting-and-tv-panels
For its OLED Tvs, the new stack structure enabled LG to increase its color gamut from 114% sRGB to 129% sRGB (or from 90% DCI to 99% DCI). The power consumption was improved by 20% and LG will be able to ship OLED TVs that feature 1,000 nits of brightness in 2017.