By Sophie Knight TOKYO (Reuters) – Japan Display Inc, the world’s biggest smartphone LCD maker, got a third of its revenue from Apple Inc in the year to March, growing more reliant on the iPhone even as it seeks to bump up orders from fast-growing Chinese smartphone makers. The display maker, which supplies screens for the iPhone along with Sharp Corp and LG Display Co Ltd, is expected to further increase sales to Apple this year with the release of the iPhone 6, which supply chain sources say will sport larger panels than previous generations. Apple squeezes its parts suppliers hard on price, resulting in narrow margins, the sources say, while a high reliance on its product cycle can cause large swings in quarterly profits.