Global suppliers of liquid crystal display (LCD) panels will cut their output in the third quarter, according to a market research firm Wednesday, as panel prices drop and weak demand outweighs expectations for a holiday sales peak. Major LCD makers are forecast to reduce the monthly input of glass substrate, key materials for LCD panels, by 14 percent on-quarter during the current quarter to 12.2 million square meters, according to DisplaySearch. In the April-June period, glass substrate input reached 14.2 million square meters on average per month, it said. The reduced input will lead to lower-than-expected operation rates at LCD production lines, the market research firm said.