US Patent Issued to DENSO on Feb. 10 for "Virtual image display device" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,993, issued on Feb. 10, was assigned to DENSO Corp. (Kariya, Japan).

"Virtual image display device" was invented by Heng Liu (Kariya, Japan), Jyunya Yokoe (Kariya, Japan) and Kenta Futamura (Obu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A virtual image display device includes a light source, an image member, a Fresnel lens array having an array structure of Fresnel lens units. Each of the Fresnel lens units includes divided lens surfaces that commonly curve convexly or concavely. The array structure includes eccentric Fresnel lens units as the Fresnel lens units. The divided lens surfaces have curvature centers offset from an individual ...