Patent ID: 11892718
Assignee: REALD SPARK, LLC
Field: Optics (Instruments)
Classification: CPC G  B | IPC F  G

Claim 25:
26. A display device according to claim 22, wherein the backlight comprises:
at least one first light source arranged to provide input light;
at least one second light source arranged to provide input light in an opposite direction from the at least one first light source;
a waveguide arrangement comprising at least one waveguide, the waveguide arrangement being arranged to receive the input light from the at least one first light source and the at least one second light source and to cause light from the at least one first light source and the at least one second light source to exit from the waveguide arrangement by breaking total internal reflection; and
an optical turning film component comprising:
an input surface arranged to receive the light exiting from a waveguide through a light guiding surface of the waveguide by breaking total internal reflection, the input surface extending across the plane; and
an output surface facing the input surface, wherein the input surface comprises an array of prismatic elements.