ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,362, issued on March 4.
"Polarity switching power line communication" was invented by Jae Boo Choi (Anyang-si, South Korea) and Changjoon Choi (Anyang-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Instead of the method of performing the power disconnection in the existing phase angle control AC power line communication, using relays or various power semiconductor devices, if communication is executed through data mapping on a pattern where polarity switching (in the case of AC, phase-shifting by 180deg) occurs at a differential voltage level of a power line, no power disconnection occurs and high voltage interval is utilized so that...