Patent ID: 7208194

Claim:
A method for producing an optical compensation sheet from a continuous film, which is constructed of a transparent film base and a transparent polymer layer formed on said film base, comprising steps of: (a) transporting said film base; (b) blowing a first air onto said polymer layer on said film base while transporting said film, said first air having a dry bulb temperature of 30–60° C. and a relative humidity of 55–80%; (c) blowing a second air onto said polymer layer after step (b), said second air having a dry bulb temperature of 20–30° C. and a relative humidity of 30–50%; (d) rubbing a surface of said polymer layer to form alignment on said polymer layer after step (c); and (e) coating said polymer layer with a solution containing liquid crystal after step (d), so as to obtain said optical compensation sheet.