Method of applying polarized film to liquid crystal display cell

Details Method of applying polarized film to liquid crystal display cell Method of applying polarized film to liquid crystal display cell

1978-10-06

1980-01-01

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156518, B32B 3100

Patent

active

041815548

ABSTRACT:
In the disclosed method, a punch having a hollow open end is used to cut a portion of polarized film from a continuous sheet of polarized film. Subsequently, this portion of film is held by its perimeter while a piston that fits inside the punch and has a flexible convex shaped tip pushes the center of the portion of the held film against a liquid crystal display cell. Then the force exerted by the piston is increased. This forces the portion of film against the display cell with a rolling motion away from its center. The rolling motion eliminates the trapping of air bubbles between the portion of film and the display cell. By further increasing the force of the piston against the display cell, the flexible tip of the piston deforms in a lateral direction. Thus it completely covers the display cell, even though its undeformed cross-sectional area is less than that of the display cell.

REFERENCES:
patent: 2081716 (1937-05-01), Scholl
patent: 3282762 (1966-11-01), Stork
patent: 3959061 (1976-05-01), Renck

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