Method of forming a film with a lenticular lens array

Abstract

According to one aspect of the invention, there is provided a method of forming a film with a lenticular lens array, the method comprising providing a substrate; providing a mold having a plurality of nano-scale to micro-scale cavities that form the lenticular lens array on the substrate; having the mold contact the substrate; and forming the lenticular lens array by allowing portions of the substrate to partially fill the plurality of cavities.

1 . A method of forming a film with a lenticular lens array, the method comprising:
 providing a substrate;   providing a mold having a plurality of nano-scale to micro-scale cavities that form the lenticular lens array on the substrate;   having the mold contact the substrate; and   forming the lenticular lens array by allowing portions of the substrate to partially fill the plurality of cavities.   
     
     
         2 . The method of  claim 1 , wherein an aspect ratio of each lens of the lenticular lens array is adjusted by controlling an extent to which the portions of the substrate partially fill the plurality of cavities. 
     
     
         3 . The method of  claim 2 , further comprising varying a duration over which the lenticular lens array is formed to control the extent to which the portions of the substrate partially fill the plurality of cavities. 
     
     
         4 . The method of  claim 2 , wherein the aspect ratio of each lens is less than or equal to 0.04. 
     
     
         5 . The method of  claim 1 , wherein each lens of the lenticular lens array has a symmetric cross-sectional profile. 
     
     
         6 . The method of  claim 5 , wherein each lens is generally symmetric about a longitudinal axis extending along a centre and intersecting a base of the respective lens. 
     
     
         7 . The method of  claim 1 , wherein the formation of the lenticular lens array occurs at a range of around 10° below or above the glass transition temperature of the substrate. 
     
     
         8 . The method of  claim 7 , wherein the formation of the lenticular lens array occurs at a pressure of around 10 Bar to 60 Bar. 
     
     
         9 . The method of  claim 1 , wherein the mold comprises polydimethylsiloxane (PDMS). 
     
     
         10 . A film fabricated from the method of  claim 1 , comprising a lenticular lens array, wherein each lens has a width of less than 300 μm. 
     
     
         11 . The film of  claim 10 , wherein each lens has an aspect ratio of less than or equal to 0.04. 
     
     
         12 . The film of  claim 10 , wherein each lens has a smooth surface. 
     
     
         13 . The film of  claim 10 , wherein the lenticular lens array is provided on a substrate fabricated from flexible material. 
     
     
         14 . The film of  claim 13 , wherein the substrate comprises any one or more of the following materials: plastic, polymethylmethacrylate, polycarbonate and polyethylene. 
     
     
         15 . A display configured for two dimensional and three dimensional content, the display comprising a film of  claim 10 , the film for spectacles-free three dimensional viewing of the three dimensional content.