WIDE-VIEW OPTICAL FILM HAVING REVERSED WAVELENGTH DISPERSION

• Main Authors: MCWILLIAMS DOUGLAS S, HARRIS FRANK, GERMROTH TED CALVIN, JING JIAOKAI, KUO THAUMING, ZHANG DONG, ZHENG XIAOLIANG, WANG BIN
• Format: Patent
• Language: English; Korean
• Published: 06.10.2015
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; 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; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MECHANICAL ENGINEERING; 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; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

(n+n)/2 ≥ n및 |n-n|< 0.005의 방정식을 만족하는 굴절률 프로파일을 갖는 제1 중합체 필름 및 (n+n)/2 < n및 |n-n|< 0.005의 방정식을 만족하는 굴절률 프로파일을 갖는 제2 중합체 필름을 포함하는 다층 필름을 1축 또는 2축 연신함으로써 제조되는 광학 보상 필름이 개시되며, 여기서 n및 n는 면내 굴절률을 나타내고 n는 필름의 두께 방향 굴절률을 나타내며, 상기 광학 보상 필름은 0.7<R/R<1 및 1<R/R<1.25(여기서, R, R, 및 R은 각각 450 nm, 550 nm, 및 650 nm의 광파장에서의 면내 위상차임)의 관계를 만족하는 포지티브 면내 위상차를 가진다. An optical compensation film is disclosed herein, which is made by uniaxially or biaxially stretching of a multilayer film including a first polymer film having a refractive index profile satisfying the equations of (nx+ny)/2≥nz and |nx−ny|<0.005 and a second polymer film having a refractive index profile satisfying the equations of (nx+ny)/2<nz and |nx−ny|<0.005, wherein nx and ny represent in-plane refractive indices and nz the thickness-direction refractive index of the films, and wherein said optical compensation film has a positive in-plane retardation that satisfies the relations of 0.7<R450/R550<1 and 1<R650/R550<1.25, wherein R450, R550, and R650 are in-plane retardations at the light wavelengths of 450 nm, 550 nm, and 650 nm respectively.