ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,724,261, issued on Sept. 1, was assigned to Interface Technology (ChengDu) Co. Ltd. (Chengdu, China), INTERFACE OPTOELECTRONICS (SHENZHEN) Co. LTD. (Shenzhen, China) and GENERAL INTERFACE SOLUTION Ltd. (Zhunan, Taiwan).

"Optical film, head up display, and vehicle" was invented by Yen-Ling Chen (New Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical film to proof a head up display (HUD) system against image-contamination by sunlight and against the heat of sunlight is applied in a vehicle. The optical film includes a transparent substrate, a transparent microstructure layer, and a plurality of light blocking layers which allow trans...