ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,399,308, issued on Aug. 26, was assigned to SHENZHEN OPTIARK SEMICONDUCTOR TECHNOLOGIES Ltd. (Shenzhen, China).

"Display apparatus comprising diffractive elements" was invented by Yisheng Zhu (Guangdong, China), Tapani Kalervo Levola (Guangdong, China) and Houqiang Jiang (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display apparatus comprises an optical engine, a modifying unit, and a diffractive waveguiding expander device. The optical engine is configured to form first input light, which comprises a plurality of input light beams representing an input image. The modifying unit is configured to form second input light from the fir...