ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,219,822, issued on Feb. 4, was assigned to Samsung Display Co. Ltd. (Yongin-si, South Korea).
"Organic light emitting diode display device" was invented by Junghyun Cho (Yongin-si, South Korea) and Haeyoung Yun (Yongin-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An organic light emitting diode display device includes a substrate, a protection layer on the substrate, the protection layer including a trench pattern and a recessed portion, a first electrode on the protection layer, a pixel defining layer on the protection layer, the pixel defining layer defining an opening that exposes at least a part of the first electrode, an organic li...