Illinois attorney general Lisa Madigan, following her New York state counterpart's recent move, filed an antitrust action on August 10 against 22 major technology companies, including Samsung Electronics, LG Display (LGD), Chimei Innolux (CMI) and AU Optronics (AUO), for alleged participation in conspiracies to fix TFT-LCD panel prices.

Other defendants include AUO America, Chi Mei Optoelectronics (CMO) USA, CMO Japan, Epson Imaging Devices, Epson Electronics America, Hitachi, Hitachi Displays, Hitachi America, Hitachi Electronic Devices (USA), LG Display America, Samsung Semiconductor, Samsung Electronics America, Sharp, Sharp Electronics, Toshiba, Toshiba America Electronic, Toshiba Mobile Display, and Toshiba America Information Systems.

Florida attorney general Bill McCollum was cited in a article on Audioholics.com saying that he plans to follow the action and file an antitrust lawsuit against the major TFT-LCD panel makers over alleged price fixing.