US Patent Issued to siOPTICA on Oct. 6 for "Backlight with optical film, illumination device therewith, and display screen" (German Inventor)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,447, issued on Oct. 6, was assigned to siOPTICA GmbH (Jena, Germany).

"Backlight with optical film, illumination device therewith, and display screen" was invented by Andre Heber (Jena, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A backlight extending in a planar manner, emits light and has an optical film for controlling and limiting a viewing angle range of a viewer. The optical film includes a first polarization layer with a first absorption axis, which forms an angle of from 0deg to 30deg, inclusive, with a surface normal of the optical film, at least one phase-shifting compensation layer for improving the limiting of the viewing angle...