US Patent No: 6,183,090

Number of patents in Portfolio can not be more than 2000

Projection type image display apparatus

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Abstract

A projection type image display apparatus of the present invention includes: a light source; a polarization selective reflection element having a function of reflecting or transmitting a light beam from the light source in accordance with a polarization direction thereof; and an element for modulating a polarization plane of an incident light beam in accordance with an image to be displayed. The polarization selective reflection element is film-like and has an optical transmission axis and an optical reflection axis. The polarization selective reflection element transmits a first linearly polarized light beam, and reflects a second linearly polarized light beam having a polarization plane orthogonal to a polarization plane of the first linearly polarized light beam, regardless of a direction of incidence of a light beam with respect to the polarization selective reflection element.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SHARP KABUSHIKI KAISHAOSAKA17825

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hamada, Hiroshi Anjo, JP 142 2340
Kato, Hiromi Odawara, JP 20 158
Nakanishi, Hiroshi Tokyo, JP 86 787
Takahara, Ikuo Nara, JP 3 78

Cited Art

Patent Info (Count) # Cites Year
 
FUJITSU LIMITED (2)
5,764,412 Polarization separation/conversion device for polarized lighting apparatus and projection display unit 30 1995
5,826,960 Protection type display device with polarized light reflecting mirror and polarized light source 25 1997
 
GREYHAWK SYSTEMS, INC. (2)
5,365,287 Three color channel, two-elevation optics for a single lens video projector 17 1993
5,374,968 Optics for a single-lens video projector with color-specific polarization channels 58 1993
 
VICTOR COMPANY OF JAPAN, LTD. (2)
5,239,322 Display apparatus 54 1991
5,379,135 Optical system for display apparatus 31 1993
 
3M INNOVATIVE PROPERTIES COMPANY (1)
5,699,188 Metal-coated multilayer mirror 220 1995
 
CANON KABUSHIKI KAISHA (1)
5,748,369 Polarizing beam splitter and an illuminating device provided with the same 57 1995
 
CITIZEN FINETECH MIYOTA CO., LTD. (1)
5,900,976 Display system including a polarizing beam splitter 27 1998
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,765,934 Projection type display 54 1996
 
NATIONAL RESEARCH COUNCIL OF CANADA (1)
5,982,541 High efficiency projection displays having thin film polarizing beam-splitters 49 1998
 
NIKON CORPORATION (1)
5,798,819 Projection-display apparatus and method providing improved brightness of projected color image 80 1996
 
Nitto Electric Industrial Co., Ltd. (1)
4,427,741 Polarizing film 54 1981
 
North American Philips Corporation (1)
4,913,529 Illumination system for an LCD display system 65 1988
 
Pioneer Electronic Corporation (1)
5,826,959 Projection image display apparatus 60 1997
 
POLAROID CORPORATION (1)
4,446,305 Optical device including birefringent polymer 178 1981
 
SAMSUNG ELECTRONICS CO., LTD. (1)
5,706,063 Optical system of a reflection LCD projector 21 1995
 
TOPPOLY OPTOELECTRONICS CORP. (1)
5,886,754 Liquid crystal display projector 12 1997
 
U.S. Philips Corporation (1)
4,969,730 Image projection arrangement 89 1989

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
JDS UNIPHASE CORPORATION (8)
6,851,812 Color management system 1 2002
6,857,747 Color management system 13 2002
6,899,432 Color management system having a transmissive panel and optical isolator 2 2003
6,945,654 Color management system having a prism to compensate for optical aberrations and to enhance contrast 3 2004
6,971,747 Image display device having a compensating prism group 1 2004
7,108,374 Image display device having a field lens 1 2005
7,347,561 Image display device 1 2005
7,104,650 Image display device having a transmissive panel and an optical isolator 1 2005
 
LIGHTMASTER SYSTEMS, INC. (5)
6,999,237 Method and apparatus for configuration and assembly of a video projection light management system 1 2002
6,809,874 Pathlength matched beam splitter and method and apparatus for assembly 0 2002
6,909,556 Design of prism assemblies and kernel configurations for use in projection systems 3 2003
6,982,829 Prism assembly with cholesteric reflectors 7 2003
7,006,297 Pathlength matched beam splitter and method and apparatus for assembly 0 2004
 
3M INNOVATIVE PROPERTIES COMPANY (2)
6,609,795 Polarizing beam splitter 44 2001
6,926,410 Polarizing beam splitter 9 2003
 
HITACHI, LTD. (2)
7,241,015 Optical unit and projection type image display unit using it 1 2004
7,246,907 Projection type image display apparatus using reflective image display elements, reflective polarizing plates and auxiliary analyzers 0 2006
 
NIKON CORPORATION (2)
6,345,895 Projection type display apparatus 22 1999
6,669,344 Color synthesizing optical apparatus and projection type display apparatus 8 2002
 
SEIKO EPSON CORPORATION (2)
6,497,485 Image projection system having uniform brightness 9 2000
6,746,123 Projector for preventing light loss 1 2002
 
Berg & Berg Enterprises, Inc. (1)
7,280,281 Method and apparatus for increasing microdisplay black state in light management systems and flexibility to utilize polarized or unpolarized input light 1 2003
 
FUJITSU GENERAL LIMITED (1)
6,742,897 Liquid crystal projector device 2 2000
 
GAIN MICRO-OPTICS, INC. (1)
6,375,330 Reflective liquid-crystal-on-silicon projection engine architecture 69 1999
 
HON HAI PRECISION INDUSTRY CO., LTD. (1)
8,057,042 Stereo projection optical system using LCD to separate left and right eye images 0 2007
 
IMAX CORPORATION (1)
6,582,080 Image projection system 8 2002
 
INTELLECTUAL VENTURES I LLC (1)
6,379,010 Projection type display 17 1999
 
JVC KENWOOD CORPORATION (1)
8,197,067 Projection type display apparatus with means for removing unnecessary polarized components of color lights 0 2009
 
KONINKLIJKE PHILIPS ELECTRONICS N.V. (1)
6,508,557 Reflective LCD projector 4 2000
 
LG ELECTRONICS INC. (1)
7,172,287 Reflective illuminating optical system 3 2004
 
NEXT WAVE OPTICS, INC. (1)
7,530,693 Single MEMS imager optical engine 0 2006
 
PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD. (1)
6,549,248 System for a compact projection display using reflection type liquid crystal panels 3 2000
 
PROKIA TECHNOLOGY CO., LTD. (1)
6,384,972 Projection display with three polarization beam splitter prisms 29 2001
 
ROHM AND HAAS DENMARK FINANCE A/S (1)
6,848,795 Increased contrast overhead projection films 16 2002
 
SHARP KABUSHIKI KAISHA (1)
6,327,093 Image display apparatus 34 2000
 
SILICON VALLEY PATENT AGENCY (1)
7,320,521 Optical engine architectures 0 2005
 
THOMSON LICENSING (1)
6,888,691 Apparatus and method for isolating optics from thermal expansion 0 2003
 
Tonso, Franco (1)
6,343,864 Liquid crystal projector equipment 32 2000