Waveguide, edge-lit illumination arrangement and display comprising such
First Claim
1. A waveguide comprising an entry side face for coupling light into the waveguide, an exit surface for emission of light from the waveguide, and polarization-selective light outcoupling means for coupling out waveguided light through the exit surface polarization selectively, the polarization-selective outcoupling means comprising a volume hologram configured to selectively diffract waveguided light towards the exit surface.
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Accused Products
Abstract
A polarized light-emitting waveguide for use in an edge-lit lighting arrangement has polarization-selective outcoupling means including at least a volume hologram for selectively diffracting waveguided light towards the exit surface of the waveguide with high contrast and efficiency. The light emitted by the waveguide is selectively emitted to one side thereof, highly polarized, highly collimated and may be homogeneously distributed across the exit surface. Also, light emission may be normal or near-normal to the exit surface. If combined with light recycling means the contrast, brightness and/or efficiency of the edge-lit illumination arrangement may be further increased.
126 Citations
15 Claims
- 1. A waveguide comprising an entry side face for coupling light into the waveguide, an exit surface for emission of light from the waveguide, and polarization-selective light outcoupling means for coupling out waveguided light through the exit surface polarization selectively, the polarization-selective outcoupling means comprising a volume hologram configured to selectively diffract waveguided light towards the exit surface.
- 10. A waveguide comprising an entry side face for coupling light into the waveguide, an exit surface for emission of light from the waveguide, a back surface opposite the exit surface, and a volume hologram configured to selectively couple out light to one side of the waveguide, the one side being the exit surface side of the waveguide.
Specification