Patent ID: 11933978
Assignee: ELBIT SYSTEMS LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system comprising:
an electronic display comprising a backlight unit, an optical medium, a Fresnel lens, and liquid crystal display (LCD) cells,
wherein the optical medium comprises an array of micro louvers, wherein the optical medium steers light coming from the backlight unit into light cones by limiting an exit angle of the backlight so as to meet dimensions of an eye motion box of a viewer facing said electronic display, wherein the optical medium is designed to allow a dispersion of the light cones, sufficient so that the viewing from the eye motion box allows viewing light coming of the entire display,
wherein the Fresnel lens is located between the optical medium and the LCD cells and designed to focus the light cones to a specific distance and angle from the surface of the Fresnel lens, being the plane of the eye motion box defined by borders thereof, ensuring that said light cones do not stray away from borders defined by the eye motion box,
wherein the center of said Fresnel lens is vertically and horizontally offset relative to the center of the electronic display, and
wherein said electronic display is a large area display (LAD).