ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,386,504, issued on Aug. 12, was assigned to OMRON Corp. (Kyoto, Japan).

"Display device and presentation device equipped with same" was invented by Ryota Kanda (Kyoto, Japan), Junya Fujita (Kyoto, Japan) and Naoya Kakimoto (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display selection button 10 comprises a light projecting unit 21, a light guide plate 13, a light receiving units 22, a control unit 30, and a printed sheet 14 and a LED 25. The light guide plate 13 has an incident surface 13a to which the light emitted from the light projecting unit 21 is incident, a plurality of prisms 13d that reflect incident light toward the side appr...