Patent ID: 11927855
Assignee: nan
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 1:
2. The display system of claim 1, wherein the extended illumination source comprises:
a lightguide for propagating light therein along a length and a width of the lightguide, the lightguide facing the first liquid crystal assembly and comprising the extended emission surface;
the at least one light source disposed proximate an edge surface of the lightguide; and
a reflecting layer facing a bottom side of the lightguide away from the first liquid crystal assembly and configured to reflect light that exits the lightguide toward the reflecting layer back, the reflected light propagating toward the first liquid crystal assembly, and wherein for substantially normally incident light in a visible wavelength range from about 420 nm to about 680 nm, the reflecting layer has an average diffuse reflectance RD, and an average specular reflectance RS, RS>RD>10%.