ELLIPTICALLY POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide an elliptically polarizing plate which includes an optical compensation plate formed of a liquid crystal layer, which is thin, which hardly induces cracks caused by a foreign substance in a cold impact test, and which hardly induces wrinkles caused by shrinkage of a...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAKITA YOSHIKO, HAYASHI HIDEKI, KANZAKI AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	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 PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an elliptically polarizing plate which includes an optical compensation plate formed of a liquid crystal layer, which is thin, which hardly induces cracks caused by a foreign substance in a cold impact test, and which hardly induces wrinkles caused by shrinkage of a linearly polarizing plate in a heat test.SOLUTION: The elliptically polarizing plate 10 is formed by layering a linearly polarizing plate 1, a first adhesive layer 5, a retardation plate 2, a second adhesive layer 6, an optical compensation plate 3 formed of a liquid crystal layer, and a third adhesive layer 7 in this order. The second adhesive layer 6 is formed of a material having a storage modulus larger than that of the third adhesive layer 7, and the elliptically polarizing plate is stuck, in the third adhesive layer side, to at least one surface of a liquid crystal cell. The first adhesive layer 5 is preferably formed of a material having a storage modulus larger than that of the third adhesive layer 7. It is advantageous that the first adhesive layer and the second adhesive layer are configured to have a storage modulus of 1×10N/mor more and that the third adhesive layer is configured to have a storage modulus of 3×10N/mor less.