Method of producing a lenticular device for an autostereoscopic display apparatus
View Patent ↗A method of producing a lenticular device for an autostereoscopic display apparatus includes providing a substrate having a surface which corresponds in shape to a desired surface profile for the array of lenticular elements, and providing an optical layer mixture of an optically birefringent material and a polymer precursor over the substrate surface. The optical layer is exposed to a stimulus for polymerizing the polymer precursor to have at least a polymer surface layer, thereby enclosing the material between the polymerized material and the surface to define lenticular elements. This method allows a simple polymerization process, forming a single layer, to complete the LC cell formation in the desired lenticular array shape.
1. A method of producing a lenticular device for an autostereoscopic display apparatus, the lenticular device comprising an array of lenticular elements, the method comprising:
applying an optical layer mixture of an optically birefringent material and a polymer precursor over a surface of a substrate, the surface of the substrate corresponding in shape to a desired surface profile for the array of lenticular elements, such that one side of the optical layer mixture assumes the shape of said desired surface profile for the array of lenticular elements by conforming to the surface of the substrate; and
exposing another side of the optical layer mixture to a stimulus for polymerizing the polymer precursor to form at least a polymer surface layer that is substantially flat relative to the desired surface profile for the array of lenticular elements, and that has a depth that reaches beyond peaks of the surface of the substrate and extends only partly into a cavity of each lenticular element of the array, thereby forming a mechanical fixture across the entire array of lenticular elements and enclosing the array of lenticular elements to form a plurality of polymer capsules filled with the birefringent material.
2. The method as claimed in claim 1 , wherein the lenticular elements comprise non-polymerized electro-optic material enclosed between the polymerized material and the substrate surface.
3. The method as claimed in claim 1 , wherein the polymer surface layer is of substantially uniform thickness relative to the desired surface profile for the array of lenticular elements.
4. The method as claimed in claim 1 , wherein the optical layer mixture is applied by a coating process.
5. The method as claimed in claim 1 , wherein the optical layer mixture is applied by printing.
6. The method as claimed in claim 5 , wherein the optical layer mixture is applied using a doctor blade.
7. The method as claimed in claim 1 , wherein the optically birefringent material comprises a liquid crystal material.
8. The method as claimed in claim 1 , wherein exposing the optical layer to a stimulus comprises exposing the optical layer to UV radiation.
9. The method as claimed in claim 1 , further comprising manufacturing the substrate having a surface, which corresponds in shape to a desired surface profile for the array of lenticular elements, by:
providing a glass substrate;
providing a transparent conductive layer over the glass substrate; and
providing a replica layer having as its upper surface the surface which corresponds in shape to a desired surface profile for the array of lenticular elements.
10. The method as claimed in claim 9 , wherein the manufacture of the substrate having the surface which corresponds in shape to a desired surface profile for the array of lenticular elements further comprises:
providing a polyimide layer over the surface; and
baking and rubbing the polyimide layer.
11. The method as claimed in claim 1 , further comprising applying a transparent conducting layer over the polymer surface layer.
12. The method as claimed in claim 11 , wherein the transparent conducting layer comprises ITO.