ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,550,532, issued on Feb. 10, was assigned to Samsung Display Co. Ltd. (Yongin-si, South Korea).

"Pixel, stage circuit and organic light emitting display device having the pixel and the stage circuit" was invented by Ji Hyun Ka (Yongin-si, South Korea), Han Sung Bae (Yongin-si, South Korea) and Won Kyu Kwak (Yongin-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pixel includes a pixel circuit and an organic light emitting diode. The pixel circuit has first, second, third, and fourth transistors. The first transistor controls an amount of current flowing from a first driving power supply coupled to a first node to a second driving power su...