US Patent Issued to Semiconductor Energy Laboratory on Feb. 3 for "Light-emitting device and camera" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,541,139, issued on Feb. 3, was assigned to Semiconductor Energy Laboratory Co. Ltd. (Japan).

"Light-emitting device and camera" was invented by Yoshiharu Hirakata (Kanagawa, Japan), Nobuharu Ohsawa (Kanagawa, Japan), Hisao Ikeda (Kanagawa, Japan), Kazuhiko Fujita (Kanagawa, Japan) and Akihiro Kaita (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived."

The ...