South Korea's Samsung Electronics has forecast that its second-quarter operating profit will fall by 26% from a year earlier to 3.7 trillion won ($3.48 billion).
Giving an update before the release of official results, Samsung also estimated second-quarter revenue at 39 trillion won, a 2.9% increase from a year earlier.
The company, the world's biggest maker of flat panels, memory chips and flat-screen televisions, did not give an estimate for net profit or other details.
Analysts said the liquid crystal display business probably suffered from falling demand for televisions and personal computers - especially in the United States and Europe - as the global economic recovery falters.
They expected earnings to improve modestly in coming quarters due largely to strong sales of its latest version of the Android-powered smartphone, Galaxy S II. As of the end of June, Samsung had sold around three million of the new model globally since it made its debut in April.
