Method and machine for producing optical compensation sheet
First Claim
1. 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;
(b) blowing a first air onto said polymer layer of said film upon transporting said film, said first air having dry bulb temperature between 30°
C. and 60°
C. and relative humidity between 55% and 80%;
(c) rubbing a surface of said polymer layer to form alignment on said polymer layer after step (b); and
(d) coating said polymer layer with a solution containing liquid crystal after step (c), so as to obtain said optical compensation sheet.
2 Assignments
0 Petitions
Accused Products
Abstract
A film sheet which has a polymer layer formed of a coating solution is drawn from a balk roll and transported toward a rubbing apparatus. Thereby, first and second blowers sequentially disposed respectively apply to the polymer layer an air of temperature 45±2° C. and humidity 50%-60%, and an air of temperature 25±1° C. and humidity 30%-35%. Thus, damages which occurred in transporting and rolling the film sheet are removed. Thereafter, a rubbing action is performed to the film sheet such that the polymer layer has alignment. Then a liquid crystal layer is formed on the polymer layer, to obtain an optical compensation film.
-
Citations
18 Claims
-
1. 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;
(b) blowing a first air onto said polymer layer of said film upon transporting said film, said first air having dry bulb temperature between 30°
C. and 60°
C. and relative humidity between 55% and 80%;
(c) rubbing a surface of said polymer layer to form alignment on said polymer layer after step (b); and
(d) coating said polymer layer with a solution containing liquid crystal after step (c), so as to obtain said optical compensation sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A machine 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, said machine comprising:
-
a transporting means for transporting said film;
a first blower for blowing a first air onto said polymer layer of said transported film, said first air having dry bulb temperature between 30°
C. and 60°
C. and relative humidity between 55% and 80%;
a rubbing means positioned downstream from said first blower, for rubbing said polymer layer to form alignment on said polymer layer; and
a liquid crystal layer forming means positioned downstream from said rubbing means, for forming a liquid crystal layer on said polymer layer to obtain said optical compensation sheet. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification