Abstract:
The present invention relates generally to optical retardation films. The invention may be used as optical element in liquid crystal display (LCD) devices, particularly as phase- shifting component of LCDs of both reflection and transmission type, and in ant other field of science and technology where optical retardation films are applied such as architecture, automobile industry, decoration arts. The present invention provides an optical film comprising a substrate having front and rear surfaces, and at least one solid optical retardation layer on the front surface of the substrate. The solid optical retardation layer comprises organic rigid rod-like macromolecules based on 2,2'-disulfo-4,4'-benzidine terephthalamide-isophthalamide copolymer or its salt of the general structural formula I. The solid optical retardation layer is a negative C-type or Ac-type plate substantially transparent to electromagnetic radiation in the visible spectral range.
Abstract:
본 발명은 복합구성 편광판 세트 및 이를 포함하는 IPS 모드 액정표시장치에 관한 것으로서, 보다 상세하게는 상판 및 하판 편광판에 정면 위상차값(R0)이 10 내지 100nm이고, 굴절률비(NZ)가 0.9 내지 1.1이며, 지상축이 편광자의 흡수축과 평행하도록 배치된 일축 연신된 포지티브 A 플레이트를 포함하는 복합구성 편광판 세트와, 이러한 복합구성 편광판 세트 및 IPS 모드 액정을 포함하는 액정표시장치에 관한 것이다. 본 발명에 따른 복합구성 편광판 세트는 고온 다습한 환경에 장시간 노출된 경우에도 물리적 저항성이 우수하여 설계된 위상차 보상 효과를 유지할 수 있어 이를 포함하는 IPS 모드 액정표시장치는 고온 다습한 환경하에서도 시야각 확보가 가능하고, 경사면에서의 색감이 우수하다.
Abstract:
Multilayer optical films are disclosed that exhibit high reflectivity at normal incidence for all polarizations but preferentially transmit high angle rays in one or two orthogonal planes of incidence. Both symmetrical and asymmetrical constructions are disclosed. The films can be used in direct-lit backlights and in lighting systems other than direct-lit backlights, such as edge-lit backlights, and non-backlight lighting systems such as systems intended for general illumination without the need for any graphic component, such as luminaires and task lights.
Abstract:
It is possible to provide an optical compensation plate capable of coping with a high luminance, obtaining a high contrast ratio while suppressing contrast ratio irregularities, improving accuracy, and increasing a service life; a liquid crystal display device and a projection type liquid crystal display device using the optical compensation plate, and a display device manufacturing method and adjusting method. The liquid crystal display device includes: a liquid crystal device which vertically orientates liquid crystal molecules having a negative dielectric anisotropy and optically modulating the applied light flux by the liquid crystal layer having a pre-tilt in the direction vertical to the main surface of a substrate; a first polarization plate arranged at the incident side of the liquid crystal device; a second polarization plate arranged at the light emission side of the liquid crystal device; and an optical compensation plate arranged on an optical path between the light emission side of the first polarization plate and the incident side of the second polarization plate. The optical compensation plate has at least two compensation layers which are bonded to each other in such a manner that they have different phase difference values and different in-plane optical axis directions.
Abstract:
A liquid crystal cell (5) comprises a layer (4) of cholesteric liquid crystal material; and a retarder (3) disposed in an optical path through the layer (4) of cholesteric liquid crystal material. The cholesteric liquid crystal material is switchable between a first state in which it cooperates with the retarder (3) to provide a first viewing angle range and a second state in which it cooperates with the retarder (3) to provide a second viewing angle range which is smaller than the first viewing angle range. The pitch of the cholesteric liquid crystal material is greater than an intended wavelength of operation of the liquid crystal cell divided by the average refractive index of the liquid crystal material. The liquid crystal cell may be used as a Viewing Angle Restriction (VAR) element, to enable another component, such as a display panel (6), to be operated in either a wide viewing mode or a narrow viewing mode.