CA2451449A1 - Dynamic range enhancement of image display apparatus - Google Patents

Dynamic range enhancement of image display apparatus Download PDF

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Publication number
CA2451449A1
CA2451449A1 CA002451449A CA2451449A CA2451449A1 CA 2451449 A1 CA2451449 A1 CA 2451449A1 CA 002451449 A CA002451449 A CA 002451449A CA 2451449 A CA2451449 A CA 2451449A CA 2451449 A1 CA2451449 A1 CA 2451449A1
Authority
CA
Canada
Prior art keywords
modulator
light
image display
display apparatus
modulators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002451449A
Other languages
French (fr)
Other versions
CA2451449C (en
Inventor
Raymond John Bridgwater
Anirudh Luthra
John Robert Harding
Geoffrey Howard Blackham
Ian Macpherson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwell Collins Visual Display Systems Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2451449A1 publication Critical patent/CA2451449A1/en
Application granted granted Critical
Publication of CA2451449C publication Critical patent/CA2451449C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/312—Driving therefor
    • H04N9/3126—Driving therefor for spatial light modulators in series
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/26—Projecting separately subsidiary matter simultaneously with main image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3197—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using light modulating optical valves

Abstract

Image display apparatus comprising projector means, optical means for splitting incident light, a first modulator for modulating red light, a second modulator for modulating green light, a third modulator for modulating blue light, optical means for recombining the combined modulated red light, green light and blue light, end control means for controlling the operation of the first, second, third and fourth modulators such that the dynamic range of the image display apparatus is enhanced.

Claims (10)

1. Image display apparatus comprising projector means, optical means for splitting incident tight, a first modulator for modulating red light, a second modulator for modulating green light, a third modulator for modulating blue light, optical means for recombining the modulated red, green and blue light, a fourth modulator for modulating the combined modulated red light, green light and blue light, and control means for controlling the operation of the first, second, third and fourth modulators such that the dynamic range of the image display apparatus is enhanced.
2. Image display apparatus according to claim 1 in which the control means is such that the first modulator, second modulator and third modulator are controlled as a function of red, green and blue video signals, and the fourth modulator is controlled as a function of the red, green and blue video signal to the first, second and third modulators.
3. Image display apparatus according to claim 1 in which the control means is such that the first modulator, second modulator and third modulator are controlled as a function of the highest video signal of the red.
green and blue video signals, and the fourth modulator is controlled as a function of the highest video signal of the red, green and blue video inputs to the first red modulator, second green modulator and third blue modulator.
4. Image display apparatus according to claim 1 in which the optical means for splitting and combining the light comprises one or more beamsplitters.
5. Image display apparatus according to claim 1 in which the optical means for splitting the light and the optical means for recombining the light are essentially the same optical means.
6. Image display apparatus according to claim 1 in which the modulators for modulating light are all of the same type.
7. Image display apparatus according to claim 1 in which the modulators are all reflective type modulators for modulating light.
8. Image display apparatus according to claim 1 in which the modulators for modulating light are liquid crystal on silicon modulators for modulating light.
9. Image display apparatus according to claim 1 in which the modulators are all transmissive type modulators for modulating light.
10. Image display apparatus according to claim 1 in which the modulators are one or more different types of modulators for modulating light.
CA2451449A 2002-12-02 2003-11-28 Dynamic range enhancement of image display apparatus Expired - Fee Related CA2451449C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0228089.9A GB0228089D0 (en) 2002-12-02 2002-12-02 Dynamic range enhancement of image display apparatus
GB0228089.9 2002-12-02

Publications (2)

Publication Number Publication Date
CA2451449A1 true CA2451449A1 (en) 2004-06-02
CA2451449C CA2451449C (en) 2012-03-20

Family

ID=9948928

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2451449A Expired - Fee Related CA2451449C (en) 2002-12-02 2003-11-28 Dynamic range enhancement of image display apparatus

Country Status (6)

Country Link
US (1) US6985272B2 (en)
EP (1) EP1427221B1 (en)
AT (1) ATE357114T1 (en)
CA (1) CA2451449C (en)
DE (1) DE60312463T2 (en)
GB (2) GB0228089D0 (en)

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JP2005250235A (en) * 2004-03-05 2005-09-15 Seiko Epson Corp Optical modulating device, optical display device, optical modulation control program, optical display device control program, optical modulation control method, and optical display device control method
US7175289B2 (en) * 2004-09-15 2007-02-13 Hewlett-Packard Development Company, L.P. Optical relay
JP4524646B2 (en) * 2004-09-16 2010-08-18 セイコーエプソン株式会社 Image processing apparatus and method
JP4622425B2 (en) * 2004-09-29 2011-02-02 セイコーエプソン株式会社 Display control apparatus and method
JP4145888B2 (en) * 2005-03-23 2008-09-03 セイコーエプソン株式会社 Display device and display method
US20060244921A1 (en) * 2005-04-28 2006-11-02 Childers Winthrop D Contrast enhancement by selectively using light attenuating modulator
US20080117231A1 (en) * 2006-11-19 2008-05-22 Tom Kimpe Display assemblies and computer programs and methods for defect compensation
GB0623769D0 (en) * 2006-11-28 2007-01-10 Seos Ltd Method and apparatus for reducing motion blur in a displayed image
CN101632113B (en) 2007-02-01 2012-10-03 杜比实验室特许公司 Calibration of displays having spatially-variable backlight
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JP2009116098A (en) * 2007-11-07 2009-05-28 Victor Co Of Japan Ltd Optical system and projection display device
US7733568B2 (en) * 2008-01-28 2010-06-08 Dolby Laboratories Licensing Corporation Retroreflective optical collimation layer and display devices incorporating same
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US20090310086A1 (en) * 2008-06-16 2009-12-17 Haizhang Li Light projector and projection method with enhanced contrast
DE102008029786B4 (en) 2008-06-24 2013-10-24 Carl Zeiss Ag Projector and method for projecting an image
US8500290B2 (en) * 2008-06-24 2013-08-06 Carl Zeiss Ag Projection system
WO2009156129A1 (en) * 2008-06-24 2009-12-30 Carl Zeiss Ag Projector and method for projecting an image
US20090322800A1 (en) 2008-06-25 2009-12-31 Dolby Laboratories Licensing Corporation Method and apparatus in various embodiments for hdr implementation in display devices
US20100214282A1 (en) 2009-02-24 2010-08-26 Dolby Laboratories Licensing Corporation Apparatus for providing light source modulation in dual modulator displays
KR101596788B1 (en) * 2009-07-03 2016-02-24 삼성전자주식회사 Optical system
TWI517126B (en) * 2009-12-16 2016-01-11 杜比實驗室特許公司 Method and system for backlight control using statistical attributes of image data blocks
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WO2013162895A1 (en) * 2012-04-25 2013-10-31 3M Innovative Properties Company Two imager projection device
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Also Published As

Publication number Publication date
GB2396072B (en) 2006-07-26
EP1427221B1 (en) 2007-03-14
EP1427221A3 (en) 2005-03-23
DE60312463T2 (en) 2007-11-29
US6985272B2 (en) 2006-01-10
ATE357114T1 (en) 2007-04-15
GB2396072A (en) 2004-06-09
US20040169823A1 (en) 2004-09-02
EP1427221A2 (en) 2004-06-09
CA2451449C (en) 2012-03-20
GB0327730D0 (en) 2003-12-31
DE60312463D1 (en) 2007-04-26
GB0228089D0 (en) 2003-01-08

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Effective date: 20201130