ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,153, issued on Aug. 12, was assigned to Google LLC (Mountain View, Calif.).
"Driving circuits for piezoelectric speakers" was invented by Yao Ding (San Jose, Calif.) and Qi Qi (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "This document describes improved driving circuits for piezoelectric speakers (piezos). In aspects, a charging case for a hearable device includes a piezo and a circuit for driving the piezo having a battery, an inductor, first and second switches, and a microcontroller. The microcontroller is configured to first toggle the first switch for a number of times to charge the piezoelectric speaker via the inductor to ...