LIQUID CRYSTAL PROJECTOR

PURPOSE:To obtain a high contrast by disposing a liquid crystal panel with inclination by as much as the angle corresponding to a preferential visual angle with respect to the optical central axis of an optical path and disposing a condenser lens so as to intersect approximately orthogonally with th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIOGAI SHINJI, FUJIWARA KOICHI, HOSOI SEIJI
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY CRYPTOGRAPHY 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 DISPLAY DISPLAYING EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a high contrast by disposing a liquid crystal panel with inclination by as much as the angle corresponding to a preferential visual angle with respect to the optical central axis of an optical path and disposing a condenser lens so as to intersect approximately orthogonally with the central axis. CONSTITUTION:The liquid crystal panel 9 is disposed in the optical path from a light source 3 to a projecting lens 23 with the inclination by as much as the angle theta corresponding to the preferential visual angle and the condenser lens 7 is disposed to intersect approximately orthogonally with the central axis. The contrast is maximized at about 0 deg. angle of inclination when the contrast of a screen is observed while the angle of inclination of the condenser lens 7 is gradually lessened from the preferential visual angle and while the liquid crystal panel 9 is held set at the preferential visual angle. The contrast of the screen is improved in this way and the high performance as the projector for which the large-sized screen is used is obtd.