US Patent Issued to Semiconductor Energy Laboratory on Sept. 15 for "Display device and electronic device" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,738,196, issued on Sept. 15, was assigned to Semiconductor Energy Laboratory Co. Ltd. (Atsugi, Japan).

"Display device and electronic device" was invented by Susumu Kawashima (Atsugi, Japan), Koji Kusunoki (Isehara, Japan) and Tomoaki Atsumi (Hadano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display device whose change in chromaticity is small and grayscale controllability is high is provided. Light emission of the light-emitting device can be performed by PAM and PWM control (a pulse width control involving changes in amplitude), so that the amount of change in chromaticity can be reduced and the controllability on the low grayscale side ...