Light guide for use in a color wheel display synchronization apparatus and method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6155687
SERIAL NO

09354998

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A multimedia projector (110) employing a color wheel (120) uses a light guide (152) to transmit light from the color wheel to a photo detector (156) that detects a particular color or colors of light to provide a index mark signal to a display controller (56) to synchronize red, green, and blue image data with the associated color wheel filter segments. An integrator tunnel (122) adjacent to the light guide provides uniform, high intensity light from the color wheel to a display device, such as a DMD (130). The photo detector senses otherwise wasted light rays as sensing rays (150) that are reflected by a light source reflector (114) and propagated through the color wheel. To collect some of the sensing rays, the light guide is preferably bonded to the integrator tunnel. The light guide has a slanted output end (154) that reflects the collected sensing rays toward a photo detector on a circuit board (148). Because the light guide is bonded to the integrator tunnel, and because the color wheel rotates its filter segments from the light guide toward the integrator tunnel, the photo detector senses color changes slightly before they are received by the DMD, which is advantageous because the resulting predictive timing is consistent from one projector to the next, thereby eliminating timing adjustments.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SEIKO EPSON CORPORATIONTOKYO19047

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Peterson, Mark Lake Oswego, OR 111 1283

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SHARP KABUSHIKI KAISHA (1)
* 5805243 Liquid crystal projector using a spatial light modulator and two rotating color filters 34 1996
 
SEIKO EPSON CORPORATION (1)
* 5967636 Color wheel synchronization apparatus and method 61 1998
 
HEWLETT-PACKARD COMPANY (1)
* 6005722 Optical display system including a light valve 125 1998
 
TEXAS INSTRUMENTS INCORPORATED (4)
* 5467146 Illumination control unit for display system with spatial light modulator 153 1994
* 5680180 Color balance compensation for digital display system with color wheel 46 1995
* 5905545 Full-color projection display system using two light modulators 77 1996
* 6054832 Electronically programmable color wheel 65 1998
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION;INTELLECTUAL PROPERTY & STANDARDS (1)
* 5917558 Method for controlling a color projection video system 63 1997
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 2005/0001,995 Color recapture for display systems 0 2004
 
UNAXIS BALZERS LTD. (2)
* 7046897 Light beam preparation arrangement 1 2003
* 2004/0036,967 Light beam preparation arrangement 1 2003
 
Minolta Co., Ltd. (1)
* 6840631 Illuminating apparatus, and projector using the illuminating apparatus 3 2002
 
SEIKO EPSON CORPORATION (16)
* 6419365 Asymmetrical tunnel for spatially integrating light 61 2000
* 6474818 Mirror and aperture based color phase detector for use in a multimedia projection system 11 2000
* 6471356 Portable image projection system having reduced weight and profile 30 2000
* 6520648 Lamp power pulse modulation in color sequential projection displays 53 2001
* 6767100 System and method employing reflective imaging devices for a projection display 8 2001
* 6953251 Projector and optical device 17 2004
* 2004/0263,802 Projector and optical device 1 2004
7408202 Solid state device with current spreading segments 0 2005
* 2006/0220,041 Solid state device with current spreading segments 2 2005
7059727 Projector and optical device 3 2005
* 2005/0231,693 Projector and optical device 3 2005
7553033 Projector and optical device 4 2006
* 2006/0192,924 Projector and optical device 9 2006
* 2007/0040,995 Synchronization of an image producing element and a light color modulator 1 2006
* RE41768 System and method employing reflective imaging devices for a projection display 0 2006
RE44279 Lamp power pulse modulation in color sequential projection displays 0 2012
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (7)
* 7052146 Replaceable color wheel 3 2004
7018073 Datum structure for ensuring alignment of a lamp assembly 2 2004
7011433 Datum structure for ensuring alignment with respect to a reflector assembly 1 2004
* 2005/0168,991 DATUM STRUCTURE FOR ENSURING ALIGNMENT WITH RESPECT TO A REFLECTOR ASSEMBLY 0 2004
7188959 Lamp receiver for use in projector systems 1 2004
* 7465054 Focusing arrangement 4 2004
* 2006/0092,337 Focusing arrangement 2 2004
 
BENQ CORPORATION (1)
* 2003/0214,740 Installation frame for a color wheel assembly of a projection apparatus 5 2003
 
FUNAI ELECTRIC CO., LTD. (1)
* 6874894 DMD equipped projector 10 2003
 
REGENTS OF THE UNIVERSITY OF MINNESOTA (2)
* 6726332 TIR prism for DMD projector 18 2002
* 2003/0099,008 TIR prism for DMD projector 1 2002
 
CORETRONIC CORPORATION (8)
* 2004/0135,975 MULTI-FUNCTION PROJECTION SYSTEM 12 2003
* 2007/0091,283 Projection display apparatus 1 2006
8104898 Projection apparatus 0 2007
* 2008/0259,287 PROJECTION APPARATUS 1 2007
7883215 Projector and projector circuit board thereof 1 2008
* 8496333 Illumination module having wavelength conversion unit, projection apparatus, and light source control method 1 2011
* 2011/0261,326 ILLUMINATION MODULE, PROJECTION APPARATUS, AND LIGHT SOURCE CONTROL METHOD 10 2011
9164363 Projection apparatus 0 2013
 
JDS UNIPHASE CORPORATION (2)
6953275 System and method for providing a uniform source of light 4 2004
* 2004/0233,679 System and method for providing a uniform source of light 4 2004
 
TRANSPACIFIC IMAGE, LLC (11)
7156522 Projection-type display devices with reduced weight and size 17 2004
7281807 Positionable projection display devices 11 2004
* 2005/0057,542 Positionable projection display devices 4 2004
7806535 Low power projection display devices 2 2007
7703930 Positioning interfaces for projection display devices 6 2007
7510284 Projection-type display devices including redundant laser sets 11 2007
* 2007/0205,300 POSITIONING INTERFACES FOR PROJECTION DISPLAY DEVICES 5 2007
* RE42251 Projection-type display devices with reduced weight and size 4 2008
8147074 Positioning interfaces for projection display devices 2 2010
8366282 Positioning interfaces for projection display devices 0 2012
8641209 Positioning interfaces for projection display devices 0 2012
 
BARCO CONTROL ROOMS GMBH (1)
* 2006/0170,880 Brightness and colour control of a projection appliance 23 2003
 
TEXAS INSTRUMENTS INCORPORATED (9)
* 6275271 Tone display method 9 2000
* 6771325 Color recapture for display systems 46 2000
* 7052150 Rod integrator 13 2000
* 6591022 Illumination system for scrolling color recycling 37 2001
7066605 Color recapture for display systems 7 2004
* 7118226 Sequential color recapture for image display systems 5 2005
* 2005/0185,148 Sequential color recapture for image display systems 3 2005
7184213 Rod integrators for light recycling 2 2006
7252391 Method of producing an image 3 2006
 
Altman Stage Lighting Co., Inc. (1)
* 6671005 Digital micromirror stage lighting system 30 1999
 
DELTA ELECTRONICS, INC. (3)
* 7837336 Projection device and color wheel for use therewith 1 2006
* 2007/0258,057 PROJECTION DEVICE AND COLOR WHEEL FOR USE THEREWITH 1 2006
RE45210 Projection device and color wheel for use therewith 0 2012
 
EXPLAY LTD. (1)
* 2006/0279,662 Projection system and method 53 2004
 
CASIO COMPUTER CO., LTD. (2)
* 7976172 Projection apparatus, projection method, and computer program 1 2007
* 2007/0216,876 PROJECTION APPARATUS, PROJECTION METHOD, AND COMPUTER PROGRAM 15 2007
* Cited By Examiner