ALEXANDRIA, Va., April 15 -- United States Patent no. 12,604,384, issued on April 14, was assigned to AVISION INC. (Hsinchu, Taiwan).
"OLED print head" was invented by Yen-Cheng Chen (Hsinchu, Taiwan) and Chin-Hung Wang (Hsinchu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An OLED print head includes a control unit, multiple light-emitting units and an OLED. Each light-emitting unit includes a first driving circuit and a second driving circuit. The first driving circuit includes a first capacitor and a first switch, and is configured to store a correction voltage corresponding to a correction signal in the first capacitor in response to a trigger pulse of a scan signal, and the first switch is cont...