Patent ID: 7683989
Filing Date: 2010-03-23
Classification: G02B,G02F,H04N

Abstract:
1. A lens structure for a directional display apparatus, comprising: a birefringent lens array capable of directing light of a given polarisation into a directional distribution, the birefringent lens comprising a solid, first birefringent material and an isotropic material having an interface having a refractive structure; a second birefringent material arranged adjacent the first birefringent material of the birefringent lens, wherein the interface between the first birefringent material and the second birefringent material has an alignment microstructure providing alignment of the first birefringent material and the second birefringent material, wherein said refractive structure is uniform in one direction and said alignment microstructure at the interface between the first birefringent material and the second birefringent material is operable to provide alignment in the direction of polarisation of a polarisation component polarised in said one direction at said interface between the first birefringent material and the isotropic material.