US Patent Issued to RealD Spark on Oct. 6 for "Reflective optical stack for privacy display" (British, American Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,754,445, issued on Oct. 6, was assigned to RealD Spark LLC (Boulder, Colo.).

"Reflective optical stack for privacy display" was invented by Michael Robinson (Boulder, Colo.), Graham J. Woodgate (Henley-on-Thames, Great Britain), Jonathan Harrold (Leamington Spa, Great Britain) and Robert Ramsey (Boulder, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A privacy display comprises a polarised output spatial light modulator, reflective polariser, plural polar control retarders and a polariser. In a privacy mode of operation, on-axis light from the spatial light modulator is directed without loss, whereas off-axis light has reduced luminance. Further, d...