ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,999, issued on Feb. 10, was assigned to PANASONIC AUTOMOTIVE SYSTEMS Co. LTD. (Kanagawa, Japan).
"Light guide plate and display device" was invented by Ken'ichi Kasazumi (Osaka, Japan), Keiji Sugiyama (Kyoto, Japan), Yukihiro Chokyu (Osaka, Japan), Masafumi Sueyoshi (Kanagawa, Japan) and Kazuhiro Minami (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A light guide plate includes a first hologram element including a plurality of diffraction cells. At least one of edge lines of one diffraction cell among the plurality of diffraction cells included in the first hologram element is located at a position other than on extensions of all edge ...