PROJECTION VIDEO DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a projection video display device which can alleviate or reduce a speckle noise peculiar to a laser beam, and also, which is advantageous from the view point of light use efficiency. SOLUTION: In the projection video display device wherein the laser is used as an ill...

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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 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 video display device which can alleviate or reduce a speckle noise peculiar to a laser beam, and also, which is advantageous from the view point of light use efficiency. SOLUTION: In the projection video display device wherein the laser is used as an illumination light source, and the laser beams emitted from the laser beam sources 1r, 1g and 1b are modulated and projected through an optical system on the basis of a video signal, then, the video is enlarged and displayed, the projection type video display device includes an oscillating means (oscillation driving part 6) for oscillating the prescribed optical element (relay lens 42) constituting the optical system at high speed in an optical axis direction. COPYRIGHT: (C)2009,JPO&INPIT