PHASE DIFFERENCE FILM AND MANUFACTURE THEREOF

PROBLEM TO BE SOLVED: To provide a phase difference film of large width having optical performance applicable of a large-sized liquid crystal display device and capable of taking multiple pieces, and to be advantageous in cost. SOLUTION: This phase difference film formed by drawing a thermoplastic r...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: MAKI HARUHIKO, KOSHIOKA MASANORI
Format: Patent
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a phase difference film of large width having optical performance applicable of a large-sized liquid crystal display device and capable of taking multiple pieces, and to be advantageous in cost. SOLUTION: This phase difference film formed by drawing a thermoplastic resin film has shift of a retardation phase axis to the drawing direction in the cross direction within ±0.7 degree, and/or its dispersion of retardation in the width direction is 10 nm or less and the film width is 700 mm or more. This manufacturing method includes a drawing process of drawing at a temperature set higher than drawing temperature by 2 deg.C or more where the difference between the maximum value and the minimum value of retardation in the width direction of the phase difference film is minimum.