US Patent No: 7,789,515

Number of patents in Portfolio can not be more than 2000

Projection device with a folded optical path and wire-grid polarizer

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ALSO PUBLISHED AS: 20080284984
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A folded projection display system includes a wire-grid polarizer placed immediately behind the system's imaging screen. The display system includes an image projector that projects an image beam containing light of a predetermined linear polarization toward the imaging screen. The wire-grid polarizer reflects the light in the image beam away from the screen. The reflected image beam then encounters a ¼-wavelength achromatic retarder that converts the linear polarization to circular polarization. The image beam next hits a mirror that reflects the light back through the ¼-wavelength achromatic retarder, which converts the circular polarization back to linear polarization, with the polarization director rotated 90 degrees from the original polarization direction. The wire-grid polarizer then allows the light to pass through to the image screen.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOXTEK, INC.OREM, UT48

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gardner, Eric Provo, UT 24 292
Hansen, Douglas P Spanish Fork, UT 47 1002

Cited Art

Patent Info (Count) # Cites Year
 
MOXTEK, INC. (24)
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6,452,724 Polarizer apparatus for producing a generally polarized beam of light 30 2000
6,532,111 Wire grid polarizer 38 2001
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2002/0015,135 Image projection system with a polarizing beam splitter 8 2001
6,447,120 Image projection system with a polarizing beam splitter 45 2001
6,714,350 Double sided wire grid polarizer 19 2001
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6,785,050 Corrosion resistant wire-grid polarizer and method of fabrication 22 2002
6,666,556 Image projection system with a polarizing beam splitter 21 2002
6,665,119 Wire grid polarizer 52 2002
6,788,461 Wire grid polarizer 22 2003
6,844,971 Double sided wire grid polarizer 16 2003
2006/0119,937 Multilayer wire-grid polarizer 12 2004
 
NANTOPTICS, LLC (15)
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (9)
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SHARP KABUSHIKI KAISHA (7)
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NIKON CORPORATION (6)
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6,345,895 Projection type display apparatus 22 1999
 
ABRAXIS BIOSENSORS, LLC (5)
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2005/0181,128 Films for optical use and methods of making such films 10 2004
2005/0275,944 Optical films and methods of making the same 12 2004
2006/0001,969 Gratings, related optical devices and systems, and methods of making such gratings 13 2004
2005/0201,656 Optical polarization beam combiner/splitter 8 2005
 
JVC KENWOOD CORPORATION (5)
5,576,854 Liquid crystal light valve projector with improved contrast ratio and with 0.27 wavelength compensation for birefringence in the liquid crystal light valve 121 1993
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5,844,722 Internal aperture mask for embedded optics 23 1997
 
The United States of America as represented by the Secretary of the Army (5)
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6,310,345 Polarization-resolving infrared imager 17 1999
 
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5,490,003 Reflective liquid crystal display device with twist angle between 50.degree. and 68.degree. and the polarizer at the bisectrix 51 1993
5,506,704 Cholesteric polarizer and the manufacture thereof 135 1994
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6,250,762 Image projection system 20 2000
 
VICTOR COMPANY OF JAPAN, LTD. (5)
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HITACHI, LTD. (4)
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INTERNATIONAL BUSINESS MACHINES CORPORATION (4)
5,658,060 Arrangement for projection displays employing reflective light valves 57 1996
5,731,246 Protection of aluminum metallization against chemical attack during photoresist development 17 1996
6,247,816 Optical system for projection displays using spatial light modulators 37 1997
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KONINKLIJKE PHILIPS ELECTRONICS N.V. (4)
6,669,343 Image display system 20 2001
6,511,183 Digital image projector with oriented fixed-polarization-axis polarizing beamsplitter 30 2001
2003/0117,708 Sealed enclosure for a wire-grid polarizer and subassembly for a display system 22 2001
6,896,371 Digital image projector with oriented fixed-polarization-axis polarizing beamsplitter 9 2002
 
Minnesota Mining and Manufacturing Company (4)
5,422,756 Backlighting system using a retroreflecting polarizer 211 1992
5,325,218 Cholesteric polarizer for liquid crystal display and overhead projector 143 1992
5,333,072 Reflective liquid crystal display overhead projection system using a reflective linear polarizer and a fresnel lens 82 1992
5,559,634 Retroreflecting polarizer 90 1994
 
NEC CORPORATION (4)
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5,029,988 Birefringence diffraction grating type polarizer 37 1989
5,222,907 Multiple-pin connector 28 1992
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CANON KABUSHIKI KAISHA (3)
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2004/0008,416 Polarization separation element and optical apparatus using the same 14 2003
 
CORNING INCORPORATED (3)
5,517,356 Glass polarizer for visible light 46 1994
6,813,077 Method for fabricating an integrated optical isolator and a novel wire grid structure 35 2001
7,113,335 Grid polarizer with suppressed reflectivity 22 2003
 
EASTMAN KODAK COMPANY (3)
4,743,093 Optical disc player lens 36 1987
5,134,115 Cyan azamethine dye-donor element for thermal dye transfer 8 1990
6,215,547 Reflective liquid crystal modulator based printing system 45 1998
 
Honeywell Inc. (3)
4,795,233 Fiber optic polarizer 25 1987
5,113,285 Full color three-dimensional flat panel display 118 1990
5,751,388 High efficiency polarized display 229 1995
 
Hughes Aircraft Company (3)
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AGOURA TECHNOLOGIES, INC. (2)
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CITIZEN FINETECH MIYOTA CO., LTD. (2)
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FINISAR CORPORATION (2)
6,282,025 Optical polarization beam combiner/splitter 30 1999
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GOOGLE INC. (2)
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JDS UNIPHASE CORPORATION (2)
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6,340,230 Method of using a retarder plate to improve contrast in a reflective imaging system 30 2000
 
Niopic Moscow Research and Production Association (2)
5,235,443 Polarizer device 201 1992
5,295,009 Polarizer device 76 1993
 
ROLIC AG (2)
6,496,287 Optical identification element 50 2000
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SIEMENS AKTIENGESELLSCHAFT (2)
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TELEDYNE SCIENTIFIC & IMAGING, LLC (2)
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TYCO ELECTRONICS CORPORATION (2)
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ALPS ELECTRIC CO., LTD. (1)
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Kaiser Aerospace & Electronics Corporation (1)
5,486,935 High efficiency chiral nematic liquid crystal rear polarizer for liquid crystal displays having a notch polarization bandwidth of 100 nm to 250 nm 169 1993
 
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North American Philips Corporation (1)
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PALOMAR TECHNOLOGIES CORPORATION (1)
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WISCONSIN ALUMNI RESEARCH FOUNDATION (1)
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Other [Check patent profile for assignment information] (4)
5,267,029 Image projector 36 1992
5,841,494 Transflective LCD utilizing chiral liquid crystal filter/mirrors 77 1996
6,010,121 Work piece clamping device of workbench 30 1999
2005/0084,613 Sub-micron-scale patterning method and system 18 2004

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
MOXTEK, INC. (2)
7,961,393 Selectively absorptive wire-grid polarizer 1 2007
8,248,696 Nano fractal diffuser 0 2009

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