ALEXANDRIA, Va., June 9 -- United States Patent no. 12,288,831, issued on April 29, was assigned to EPISTAR Corp. (Hsinchu, Taiwan).

"Light-emitting diode testing circuit, light-emitting diode testing method and light-emitting diode manufacturing method" was invented by Chia-Chen Tsai (Hsinchu, Taiwan), Jia-Liang Tu (Hsinchu, Taiwan) and Chi-Ling Lee (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A manufacturing method for a LED is disclosed. The method includes: providing a substrate with an upper surface; preparing a plurality of LEDs on the upper surface; wherein the upper surface is divided into a plurality of zones, the plurality of LEDs composes a plurality of LED groups, and each of t...