US Patent No: 5,921,650

Number of patents in Portfolio can not be more than 2000

High efficiency field-sequential color projector using two SLMs

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Abstract

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A display is disclosed operating in a field-sequential color mode having first and second light valves which are simultaneously illuminated with different color beams having different polarizations provided from a color wheel. The light valves provide an image forming light to a projection lens for projecting the image forming light onto a screen. The wheel has front and back surfaces which are displaced from each other and have segments of different colors for separating a polarized white light into the simultaneous different color beams. A retardation film for converting the polarization of colors reflected from the back surface from a first polarization to a second polarization. The wheel is rotated for sequentially illuminating the light valves with different colors of different polarizations simultaneously. The display further includes a polarizing beam splitter assembly for directing the different color light beams from the wheel to the light valves and directing the image forming light to the projection lens. The polarizing beam splitter assembly includes a plurality of polarizing beam splitter sub-assemblies. A clean-up polarizer for absorbing the first or second polarizations is located between two halves of the polarizing beam splitter assembly.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERNATIONAL BUSINESS MACHINES CORPORATIONARMONK, NY75111

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Doany, Fuad Elias Katonah, NY 51 940
Rosenbluth, Alan Edward Yorktown Heights, NY 31 445

Cited Art Landscape

Patent Info (Count) # Cites Year
 
TEXAS INSTRUMENTS INCORPORATED (5)
5,371,543 Monolithic color wheel 111 1993
5,467,146 Illumination control unit for display system with spatial light modulator 150 1994
5,612,753 Full-color projection display system using two light modulators 85 1995
5,777,694 Color wheel with plastic film filters 16 1995
5,774,196 Method and apparatus of aligning color modulation data to color wheel filter segments 70 1996
 
BROTHER KOGYO KABUSHIKI KAISHA (1)
5,046,162 Image input device having color filters and filter position detector 20 1989
 
Goldstar Co., Ltd. (1)
5,463,433 Image projector 16 1994
 
VICTOR COMPANY OF JAPAN, LTD. (1)
4,851,899 Field-sequential color television camera 17 1988

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SUN INNOVATIONS, INC. (8)
7,090,355 System and method for a transparent color image display utilizing fluorescence conversion of nano particles and molecules 64 2004
7,182,467 Microstructures integrated into a transparent substrate which scatter incident light to display an image 30 2004
6,986,581 Light emitting material integrated into a substantially transparent substrate 62 2004
7,452,082 Excitation light emission apparatus 5 2005
7,213,923 Emission of visible light in response to absorption of excitation light 58 2005
7,537,346 Display having integrated light emitting material 6 2006
7,976,169 Waveguide display 2 2007
8,152,306 Waveguide display 0 2011
 
EASTMAN KODAK COMPANY (5)
6,736,514 Imaging apparatus for increased color gamut using dual spatial light modulators 7 2002
6,769,772 Six color display apparatus having increased color gamut 54 2002
6,863,402 Apparatus for displaying a color image from digital data 38 2004
6,857,748 Apparatus for displaying a color image from digital data 11 2004
7,891,816 Stereo projection using polarized solid state light sources 3 2008
 
TEXAS INSTRUMENTS INCORPORATED (5)
7,515,746 Automated color matching for tiled projection system 3 2001
7,066,605 Color recapture for display systems 5 2004
7,252,391 Method of producing an image 3 2006
7,570,410 High brightness display systems using multiple spatial light modulators 0 2006
8,253,755 System and method for image-based color sequence reallocation 0 2007
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6,273,567 Compact multi-path LCD projector 34 1998
6,709,124 Scrolling color sequential illumination system 2 2002
7,364,302 Projection display system using multiple light sources and polarizing element for using with same 4 2004
7,445,341 Four panel liquid crystal display system 1 2005
 
DUKE UNIVERSITY (3)
6,217,174 Image projection 19 1999
6,379,011 Methods of projecting images 6 2001
6,547,399 Image engine having multiple image sources with different response times for color operation 6 2002
 
SILICON QUEST KABUSHIKI-KAISHA (3)
8,226,246 Apparatus and method, both for controlling spatial light modulator 1 2008
8,061,846 Light source control method for video image display apparatus and video image display apparatus 0 2008
7,954,960 Video image display apparatus and timing control method 0 2008
 
CITIZEN FINETECH MIYOTA CO., LTD. (2)
7,116,378 Color-balanced brightness enhancement for display systems 3 2001
7,046,221 Increasing brightness in field-sequential color displays 28 2001
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
7,050,120 Display device with cooperative color filters 4 2002
8,384,773 Method and system for displaying an image in three dimensions 0 2004
 
HITACHI CONSUMER ELECTRONICS CO., LTD. (2)
6,952,241 Optical unit, video display apparatus, and color switching method 5 2001
7,929,064 Optical unit, video display apparatus, and color switching method 0 2008
 
JDS UNIPHASE CORPORATION (2)
6,886,943 High-resolution projection display system 8 2003
8,425,042 Multi-segment optical retarder for creating 3D images 0 2010
 
NEC DISPLAY SOLUTIONS, LTD. (2)
6,574,046 Reflective time-division image projector 18 2000
6,795,249 Reflective time-division image projector having a transmission color wheel 4 2003
 
SAMSUNG ELECTRONICS CO., LTD. (2)
6,439,724 Color projector 9 2000
7,393,106 Color filter unit and projection system employing the same 1 2004
 
SEIKO EPSON CORPORATION (2)
6,443,576 Projector 11 2000
6,805,450 Projector 3 2001
 
SONY CORPORATION (2)
6,467,910 Image projector 33 2000
6,568,815 Picture projection apparatus 18 2001
 
ADVANCED PERIPHERALS TECHNOLOGIES, INC., A JAPANESE CORPORATION (1)
6,457,833 Digital micro mirror device and single-panel color projector using it 18 2000
 
AIXIN TECHNOLOGIES, LLC (1)
7,334,900 Three-dimensional image projecting apparatus 1 2005
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
6,359,662 Method and system for compensating for defects in a multi-light valve display system 45 1999
 
DAI NIPPON PRINTING CO., LTD. (1)
6,727,966 Reflection type color liquid crystal display device 2 2002
 
INTEL CORPORATION (1)
7,314,282 Color-split optical engine architecture for projection displays 1 2005
 
INTELLECTUAL VENTURES I LLC (1)
6,575,579 Projecting device with a cylindrical color tube for displaying color images 3 2000
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6,650,383 Band-shifted liquid crystal structure for projection of images without spectral distortion 0 2000
 
JASPER DISPLAY CORP. (1)
7,008,064 Two panel optical engine for projection applications 4 2003
 
KINOPTICS TECHNOLOGIES INC. (1)
7,690,796 Color projection display system 1 2004
 
MINOLTA CO., LTD. (1)
6,176,583 Polarization conversion dichroic mirror and a liquid crystal projector 9 1999
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,862,047 Image projection apparatus 5 2001
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (1)
6,280,034 Efficient two-panel projection system employing complementary illumination 85 1999
 
PRODISC TECHNOLOGY INC. (1)
6,705,733 Color wheel and washer thereof 8 2003
 
QISDA CORPORATION (1)
6,705,735 Projecting device for displaying computer image 3 1999
 
REAL D (1)
8,408,708 Polarization modulation wheel 0 2010
 
SAMSUNG DISPLAY CO., LTD. (1)
6,962,414 Sequential projection color display using multiple imaging panels 16 2002
 
SHARP KABUSHIKI KAISHA (1)
6,995,738 Two-panel reflective liquid crystal display projection system and method of using the same 4 2001
 
Simon Boothroyd (1)
7,926,949 Dual-mode three-dimensional projection display 3 2007
 
THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA (1)
7,204,592 Stereoscopic image projection system 21 2003
 
TRANSPACIFIC IP II LTD. (1)
6,203,160 High efficiency liquid crystal display projection system 10 1999
 
U.S. PRECISION LENS INCORPORATED (1)
6,490,087 Optical systems for reflective LCD's 39 2000
 
USHIO DENKI KABUSHIKI KAISHA (1)
8,668,339 Light source device 0 2012
 
VENTURE LENDING & LEASING IV, INC. (1)
7,057,674 Projection display with full color saturation and variable luminosity 0 2002
 
YOUNG OPTICS INC. (1)
6,604,830 Color wheel 6 2002
 
Other [Check patent profile for assignment information] (5)
7,403,320 2-channel display system comprising micro electro mechanical systems 1 2004
7,929,208 Complex polarizer system for reciprocal polarization (cross-polarizer) 0 2005
8,102,589 Superposition system comprising micro electro mechanical systems 0 2007
7,466,473 2-channel display system comprising micro electro mechanical systems 0 2007
7,817,329 2-channel display system comprising micro electro mechanical systems 0 2007

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