It also supplies smartphone displays to Apple Inc AAPL.O. By Heekyong Yang SEOUL, May 16 (Reuters) - South Korea's LG Display Co Ltd 034220.KS will start supplying high-end TV panels to Samsung Electronic Co Ltd 005930.KS from as early as this quarter, three sources said, in a deal that would help the loss-making flat-screen maker turn profitable. The company has been running its OLED factory below full capacity due to a limited customer base and as a pandemic-driven demand surge for new TVs has tapered off amid soaring inflation and slowing economy.