ALEXANDRIA, Va., March 12 -- United States Patent no. 12,248,167, issued on March 11, was assigned to JAPAN DISPLAY INC. (Tokyo).
"Illumination device" was invented by Makoto Hasegawa (Tokyo), Nobuyuki Suzuki (Tokyo) and Masafumi Okada (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, in an illumination device, a second light guide includes a plurality of fourth projecting portions provided in a first area of a fifth main surface opposing a prism sheet, a plurality of fifth projecting portions provided in a second area of a fifth main surface, and a plurality of sixth projecting portions on a sixth main surface opposing the fifth main surface, cross-sectional shapes of the fo...