Phase difference element, liquid crystal display device and projection-type image display device

• Main Authors: HANASHIMA, NAOKI, KOIKE, NOBUYUKI, TAKADA, AKIO
• Format: Patent
• Language: Chinese; English
• Published: 19.10.2016
• Subjects: 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 LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A phase difference element comprises: a transparent substrate; a phase-difference-imparting anti-reflection layer; a first birefringent layer; and a second birefringent layer, which is in contact with the first birefringent layer in such a manner that an end portion of a first line segment on the side of the transparent substrate is an end portion A and an end portion of a second line segment on the side of the transparent substrate is an end portion B, wherein the first line segment is a line segment representing a refractive-index-anisotropy principal axis of the first birefringent layer and the second line segment is a line segment representing a refractive-index-anisotropy principal axis of the second birefringent layer. When the first line segment and the second line segment are projected onto the transparent substrate and the end portion A and the end portion B are overlapped, the angle between the first line segment and the second line segment projected onto the transparent substrate is neither 0 DEG n