Patent ID: 8585268

Claim:
A light-guide panel for a display with laser backlight comprising: a layered structure having at least a first side and a second side and comprising a substrate, a lower cladding on the substrate, and a core having a thickness; a laser light source arranged along at least the first side; a main ridge waveguide arranged along the first side in the form of a strip and comprising a plurality of first holograms formed in an upper part of the thickness of the core and arranged in sequence along the main ridge waveguide, the first holograms lying in a same plane as the main ridge waveguide and having a design that changes a direction of a laser light which propagates along the main ridge waveguide to a direction that is perpendicular to the main ridge waveguide but remains in the same plane, the first holograms being divided into a plurality of types, the holograms of each type interacting with a light of a predetermined wavelength and ignoring light of other wavelengths, the first holograms of different types being organized into identical groups and these identical groups being arranged in sequence along the main ridge waveguide; a plurality of transverse ridge waveguides that are spaced from each other, formed in the upper part of the thickness of the core, and extend parallel to the second side of the light-guiding panel, each transverse ridge waveguide of said plurality being optically coupled with one type of the first holograms of the main ridge waveguide; and each transverse ridge waveguide comprising a plurality of sequentially arranged second holograms that interact with the lights of wavelengths of those first holograms to which they are optically coupled, said second holograms having a design that changes a direction of laser light which propagates along the respective transverse ridge waveguides in a direction substantially perpendicular to a plane of the transverse ridge waveguides.