PROJECTION DISPLAY SCREEN USING DEFLECTION ELEMENT AND PROJECTION DISPLAY SYSTEM

WIPO Patent Application WO/2006/123727

A1

A projection display screen using a deflecting element, hardly diffusion-reflecting extraneous light toward the viewer, and having a high contrast ratio at bright places and a projection system are provided. The screen comprises a deflecting element (1) for deflecting the entering light from a projector light entrance angle region and directing the light toward a deflecting element exit angle region and the deflecting element exit surface area corresponding to the projector light entrance angle region, a black matrix (BM) (2) having a transmitting surface area (2A) matching the deflecting element exit surface area, and a diffusion film (3) having an entrance allowable angle region matching the deflecting element exit angle region, diffusing the light entering from the deflecting element exit angle region , and directing the diffused light toward a viewing angle region corresponding to the deflecting element exit angle region. The three are lamination-arranged in order of mention to constitute the screen.

UCHIDA TATSUO (JP)
KATAGIRI BAKU (JP)
KAWAKAMI TORU (JP)
KURATOMI YUHEI (JP)

PCT/JP2006/309899

November 23, 2006

May 18, 2006

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TOHOKU TECHNO BRAINS CORP (JP)
UCHIDA TATSUO (JP)
KATAGIRI BAKU (JP)
KAWAKAMI TORU (JP)
KURATOMI YUHEI (JP)

G03B21/62

WO2004034145A1

2004-04-22

JPS62249134A	1987-10-30
JPS63139331A	1988-06-11
JPS6330835A	1988-02-09
JP4073133B2	2008-04-09
JPS6332528A	1988-02-12
JP2002090888A	2002-03-27
JPH0627535A	1994-02-04
JPH032742A	1991-01-09
JP2004206037A	2004-07-22
JP2002277963A	2002-09-25
JP2000180973A	2000-06-30

Kobayashi, Eiichi (Funabashi-shi Chiba, 05, JP)

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