ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,991, issued on May 13.
"Light string structure based on glass LED beads" was invented by Lusha Yang (Taizhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a lighting fixture, and aims to provide a light string structure based on glass LED beads. A key point of the technical solution of the present disclosure is that adding hot melt glue between filaments and at peripheral sides of chips effectively prevents relative movement of the filaments. Further, the hot melt glue is arranged at bottoms of the beads to prevent water vapor from entering the beads through joints between the beads and a conductive wire, whi...