PROJECTION TYPE DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a projection type display device that has a wide dynamic range by allowing an increase and decrease in only a quantity of light without increasing or decreasing the number of fly eye cells or peripheral luminous fluxes. SOLUTION: In the projection type display device...

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Bibliographische Detailangaben
1. Verfasser:	YOSHII SHOICHI
Format:	Patent
Sprache:	eng
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 ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a projection type display device that has a wide dynamic range by allowing an increase and decrease in only a quantity of light without increasing or decreasing the number of fly eye cells or peripheral luminous fluxes. SOLUTION: In the projection type display device, light from a light source 10 is divided into luminous fluxes by a fly eye integrator including first and second fly eye lenses 13 and 14. Each of the luminous fluxes converges and enters a polarization conversion element 15. Light emitted after its polarizing direction is aligned is modulated by liquid crystal display elements OR, 20G and 20B so as to correspond to image signals, and the image light thus produced is enlarged and projected by a projection lens 30. A variable diaphragm mechanism 40 for varying a luminous flux width is disposed between the emission face of the second fly eye lens 14 and the polarization conversion element 15. COPYRIGHT: (C)2008,JPO&INPIT