The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1980
Filed:
Oct. 06, 1978
Dennis E Rich, Riverton, UT (US);
National Semiconductor Corporation, Santa Clara, CA (US);
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.