DISTRIBUTIVE COMPENSATOR AND PROJECTING LIQUID-CRYSTAL DISPLAY DEVICE

[Problem] There is provided a distribution-type compensator which can optimize contrast in the whole screen region using an optical system in which a field lens is disposed between a reflection-type liquid crystal element and a WG-PBS and a projection-type display apparatus mounting the same. [Solut...

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Bibliographische Detailangaben
1. Verfasser:	ABOSHI KAZUTAKA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY 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 ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	[Problem] There is provided a distribution-type compensator which can optimize contrast in the whole screen region using an optical system in which a field lens is disposed between a reflection-type liquid crystal element and a WG-PBS and a projection-type display apparatus mounting the same. [Solution] A distribution-type compensator 11 has an in-plane retardation of 18 nm ± 5 nm in a rectangular effective region with a long side and a short side. The slow axis direction of the distribution-type compensator 11 changes continuously in a plane of the effective region and an angle difference between slow axis directions at any two positions in the effective region has a maximum value in a range of 10 degrees to 30 degrees. The distribution-type compensator 11 is mounted to a projection-type display apparatus.