ALEXANDRIA, Va., July 14 -- United States Patent no. 12,681,582, issued on July 14, was assigned to Beijing BOE Technology Development Co. Ltd. (Beijing) and BOE Technology Grouup Co. Ltd. (Beijing).

"Haptic feedback substrate and driving method therefor, and touch device" was invented by Yuju Chen (Beijing), Hui Hua (Beijing), Yongchun Tao (Beijing) and Dexing Qi (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A driving method for a haptic feedback substrate includes obtaining a haptic feedback signal required by a user; and driving the haptic feedback substrate to vibrate according to the haptic feedback signal. A first AC signal is loaded to a piezoelectric vibration unit of the haptic feedback su...