https://finance.yahoo.com/news/display-makers-dip-report-apple-020448341.html > A shift to all OLED screens for iPhones would be challenging, given the sheer volume of the devices that Apple sells each year. While Samsung Electronics is the sole supplier of OLED screens for high-end Apple phones, the manufacturer also uses the displays for its own smartphones. At the same time, competitors such as LG Display Co. have struggled to move into mass production. LG Display rose as much as 5.9 percent, the biggest intraday gain in four months. > Trump Is Right: Someone Is Out to Get Him" data-reactid="26">More from Bloomberg.com: Trump Is Right: Someone Is Out to Get Him