Patent ID: 7385669

Claim:
A method for creating a micropolarizer, comprising: providing a first film comprising a linear polarizer film having a first and a second surface; providing a second film comprising a stretched PVA; cleaning said linear polarizer film with 2-propanol within an ultrasonic tank; buffing said linear polarizer film with a felt roller; cleaning said stretched PVA film with 2-propanol within an ultrasonic tank; spraying spacers on a first surface of said PVA film; making a cell with said sheet of PVA film and said sheet of said linear polarizer film in such a way that a stretching direction of said PVA film is orthogonal to a rubbing direction of said linear polarizer; placing polymerizable twisted nematic liquid crystal (TNLC) between said two sheets; covering said cell with a micropolarizer pattern mask; ensuring a direction of horizontal rows is oriented 45° with respect to said stretching direction and rubbing directions; placing said cell and said mask into a pressing machine to make said cell and said mask closed completely; controlling a thickness of said cell; polymerizing the TNLC under the transparent area with UV light into a permanent TN texture; removing said mask; heating the cell higher than a nematic-isotropic transition temperature so that unpolymerized LC covered by opaque strips of said mask experience a transition into an isotopic phase; and using UV light to polymerize uncured LC material at isotropic phase.