ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,313, issued on May 26, was assigned to PIXART IMAGING INC. (Hsin-Chu County, Taiwan).

"Optical encoding system compensating assembly tolerance" was invented by Kuan-Choong Shim (Penang, Malaysia), Meng-Yee Lim (Penang, Malaysia), Priscilla Tze-Wei Goh (Penang, Malaysia) and Gim-Eng Chew (Penang, Malaysia).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an optical encoding system including a photodiode array and a code disk opposite to each other. The photodiode array includes a detection photodiode group and a calibration photodiode group. If there is a position deviation between the photodiode array and the code disk, whether to util...