POLARIZING DIFFUSION FILM, METHOD FOR PRODUCING POLARIZING DIFFUSION FILM, AND LIQUID CRYSTAL DISPLAY DEVICE COMPRISING POLARIZING DIFFUSION FILM

• Main Authors: OKAMURA, TOMOYUKI, ERIGUCHI, MICHIO, MISUMI, MASAKI, IWATA, MASATAKA, INATOMI, YUJI, INOUE, HARUO, KAWASUMI, TAMIO, MORI, HIROSHI, ZENKOH, HIROFUMI
• Format: Patent
• Language: English; French; Japanese
• Published: 07.01.2010
• 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; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; 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

Disclosed are a film having polarization selectivity and diffusibility, and a means for easily producing the film.  The polarizing diffusion film is composed of substantially one kind of crystalline resin having an intrinsic birefringence of not less than 0.1, and has a total light transmittance to visible light of 50-90%, a transmission haze to visible light of 15-90% and a transmission polarization degree to visible light of 20-90%. L'invention concerne un film présentant une fonction de sélection et de diffusion de polarisation, et un moyen de production simple du film. Le film de diffusion polarisant est composé essentiellement d'un type de résine cristalline ayant une biréfringence intrinsèque supérieure ou égale à 0,1, et un facteur de transmission lumineuse totale à la lumière visible de 50-90 %, une diffusion de transmission à la lumière visible de 15-90 % et un degré de polarisation de transmission à la lumière visible de 20-90 %.