ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,670, issued on March 18, was assigned to Cambridge Enterprise Ltd. (Cambridge, Great Britain).

"Ghost image free head-up display" was invented by Daping Chu (Cambridge, Great Britain) and Yuanbo Deng (Cambridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image generation system for providing a ghost image free head-up display, the system comprising a display screen having a front surface and a back surface, a picture generation unit for projecting an image towards the display screen for reflection towards a predetermined eye box, and a field lens, wherein the picture generation unit is configured to project light through the fi...