ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,564, issued on May 20, was assigned to CANON K.K. (Tokyo).
"Power source device and image forming apparatus" was invented by Mitsunori Oshima (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power source device includes a rectifying portion, a switching portion to apply a voltage to a load, fully rectified by the rectifying portion, a detecting portion to detect a zero-cross point of the AC voltage, and a filter including a capacitor provided between the rectifying portion and the switching portion. A controller controls the switching portion so as to execute a discharge operation to discharge the capacitor before starting a switchi...