US Patent Issued to Shanghai Tianma Micro-Electronics on May 27 for "Polarization modulation element and three-dimensional-image display device" (Japanese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,949, issued on May 27, was assigned to Shanghai Tianma Micro-Electronics Co. Ltd. (Shanghai).

"Polarization modulation element and three-dimensional-image display device" was invented by Yukie Keicho (Kanagawa, Japan), Tetsushi Sato (Kanagawa, Japan) and Ken Sumiyoshi (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polarization modulation element includes N twisted nematic liquid crystal cells (where N is an integer of 3 or greater) for which a twist direction is identical. A sum of a twist angle of each of the twisted nematic liquid crystal cells is 90deg. In at least one of the twisted nematic liquid crystal cells that are adjace...