ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,997, issued on Feb. 10.
"Head up display device that utilizes a backlight toroidal mirror to adjust an eye box" was invented by Stephen Chen (Changhua, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A head up display that utilizes a backlight Toroidal mirror to adjust the eye box is suitable for use with an imaging semi-reflector and includes a backlight source, a backlight Toroidal mirror, a display panel, and an imaging concave mirror. The backlight Toroidal mirror is rotatable and has an X-axis curvature and a Y-axis curvature different from the X-axis curvature, and can reflect the backlight beam of the backlight source. The backlight bea...