Title:
PROJECTION DISPLAY AND SPECKLE REDUCTION ELEMENT
Document Type and Number:
WIPO Patent Application WO/2007/116935
Kind Code:
A1
Abstract:
A projection display which is miniaturized, enhances reliability and reduces
speckle noise. A blue laser (1), a red laser (2) and a green laser (3) emit blue laser
light, red laser light and green laser light, respectively, a spatial light modulation
element (14) modulates blue laser light, red laser light and green laser light
emitted from the blue laser (1), a red laser (2) and a green laser (3), a projection
lens (15) projects light modulated by the spatial light modulation element (14)
to a screen, and first and second diffusion elements (8, 9), arranged along the
optical axis between the spatial light modulation element (14) and the blue laser
(1), the red laser (2) and the green laser (3), varies the degrees of diffusion
of the blue laser light, red laser light and green laser light temporally and electrically.
Inventors:
ITOH TATSUO
MIZUSHIMA TETSURO
YAMAMOTO KAZUHISA
MIZUSHIMA TETSURO
YAMAMOTO KAZUHISA
Application Number:
PCT/JP2007/057656
Publication Date:
October 18, 2007
Filing Date:
April 05, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
ITOH TATSUO
MIZUSHIMA TETSURO
YAMAMOTO KAZUHISA
ITOH TATSUO
MIZUSHIMA TETSURO
YAMAMOTO KAZUHISA
International Classes:
G03B21/00; G02F1/13; G02F1/1334
Domestic Patent References:
| WO2005098532A1 | 2005-10-20 |
Foreign References:
| JP2003262920A | 2003-09-19 | |||
| JP2005352020A | 2005-12-22 | |||
| JP2002541526A | 2002-12-03 | |||
| JP2005309100A | 2005-11-04 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (2-2 Nakanoshima 2-chome, Kita-k, Osaka-shi Osaka 05, JP)
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