SAN FRANCISCO — U.S. District Judge Susan Illston is giving litigants some tough love as they ready to try a piece of the massive multidistrict litigation over price-fixing in the market for TFT-LCD screens.

The cases poised for trial July 22 pit retailers Best Buy Co. and Target Corp. and now-bankrupt camera designer Eastman Kodak Co. against several manufacturers of the liquid crystal display screens used in cellphones, televisions and other consumer electronics.