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    • 2. 发明专利
    • Laser light source device and a video display device
    • JP4963925B2
    • 2012-06-27
    • JP2006279676
    • 2006-10-13
    • 三菱電機株式会社
    • 陽子 井上令奈 村瀬智広 笹川
    • G03B21/00G03B21/14
    • PROBLEM TO BE SOLVED: To provide a laser light source device that outputs a luminous flux of uniform distribution of illumination by using laser beams emitted from the plurality of light emitting points of a laser light source, and to provide an image display apparatus. SOLUTION: The laser light source device 11 includes: the laser light source 1 that has the plurality of light emitting points from which laser beams are emitted; a condenser lens that condenses laser beams emitted from the plurality of light emitting points; and a diffusing element 4 disposed near a point at which the laser beams are condensed, and having a hologram for widening the angle of the diversion of the laser beam. The diffusing element has such a diffusing action that the angle of diversion of each laser beam is widened so that two or more laser beams overlap. In addition to the laser light source device 11, the image display apparatus 21 includes: an integrator rod 5 that uniformizes the intensity distribution of the laser beam emitted from the diffusing element 4; a relay lens system 6; a light valve 7; and a projection lens 8 by which the laser beam modulated by the light valve 7 is projected onto a screen 9. COPYRIGHT: (C)2008,JPO&INPIT