US Patent Issued to Seiko Epson on March 17 for "Head unit, liquid ejection device, and control method" (Japanese Inventor)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,635, issued on March 17, was assigned to Seiko Epson Corp. (Tokyo).

"Head unit, liquid ejection device, and control method" was invented by Shinichi Yamada (Nagano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A head unit includes an ejection section that ejects a liquid by a piezoelectric device displaced, a residual vibration detector that detects a residual vibration signal, a first switch that switches whether or not to feed a first drive signal, a second switch that switches whether or not to feed the residual vibration signal, and a controller that controls the first switch and the second switch. The controller acquires a detection st...