Shares of South Korean LCD panel maker LG.Philips LCD Co. Ltd. fell to historic lows on Tuesday as a probe into possible price-fixing by screen makers went global and spread to more firms. Japan’s Fair Trading Commission confirmed it was investigating price fixing claims against LG.Philips and rivals including Korea’s Samsung Electronics Co. Ltd. and Sharp Corp. of Japan. A joint venture between Japan’s Seiko Epson Corp. and Sanyo Electric Co. Ltd., which specializes in small liquid crystal display (LCD) screens for mobile phones and digital cameras, is part of the investigation. The European Union’s top competition regulator also said it was investigating possible cartel activities by producers of thin film transistor/LCDs.