Problems at LG Displays’ production lines may have played a part in Apple’s struggle to meet demand for the iPad 2, according to a new report. Citing anonymous industry sources, DigiTimes reports that Samsung shipped a total of four million 9.7-inch IPS panels for iPads in the first quarter, outpacing the 3.2 million delivered by LG Displays. LG is said to have forcibly reduced its first quarter shipments due to a light leakage problem…