The source declined to be named as the investment details remained confidential. The total cost of the plant in Ishikawa, central Japan, is estimated at 170 billion yen, Japan Display said in its statement.
Global iPhone sales, notably in China, have surged to make Apple the most profitable company in history.
Japan Display said it aims to start operations at the plant in 2016 and expects the move to increase its LCD capacity by 20 percent.
The company, formed in a government-backed deal in 2012 from the ailing display units of Sony Corp, Toshiba Corp and Hitachi Ltd, has led a volatile course since its public offering last year.
But it recently reported a rebound to profit, boosted by demand from Apple and Chinese smartphone makers, in stark contrast with Japanese competitor Sharp Corp’s shrinking panel business.