Viewing angle expansion film, polarizing plate, liquid crystal display device, and method for manufacturing viewing angle expansion film

• Main Author: NISHIOKA, HIROYA
• Format: Patent
• Language: Chinese; English
• Published: 01.08.2020
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A viewing angle expansion film for expanding a viewing angle, wherein the viewing angle expansion film is provided with a plurality of hole-including parts on at least one surface thereof and has a rectangular shape, the hole-including parts include holes, and the longitudinal direction of the hole-including parts is angled 3 DEG to 45 DEG with respect to the short-side direction of the viewing angle expansion film, or 3 DEG to 45 DEG with respect to the long-side direction of the viewing angle expansion film. Also provided are a polarizing plate and a liquid crystal display device provided with the viewing angle expansion film, and a method for manufacturing a viewing angle expansion film.