WO2001072048A3 - Color video projection system employing reflective liquid crystal display devices - Google Patents

Color video projection system employing reflective liquid crystal display devices Download PDF

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Publication number
WO2001072048A3
WO2001072048A3 PCT/US2001/009039 US0109039W WO0172048A3 WO 2001072048 A3 WO2001072048 A3 WO 2001072048A3 US 0109039 W US0109039 W US 0109039W WO 0172048 A3 WO0172048 A3 WO 0172048A3
Authority
WO
WIPO (PCT)
Prior art keywords
light rays
liquid crystal
crystal display
display devices
projection system
Prior art date
Application number
PCT/US2001/009039
Other languages
French (fr)
Other versions
WO2001072048A2 (en
Inventor
Kurt Stahl
Jeffrey A Gohman
Original Assignee
Infocus Corp
Kurt Stahl
Jeffrey A Gohman
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 Infocus Corp, Kurt Stahl, Jeffrey A Gohman filed Critical Infocus Corp
Priority to AU2001250910A priority Critical patent/AU2001250910A1/en
Publication of WO2001072048A2 publication Critical patent/WO2001072048A2/en
Publication of WO2001072048A3 publication Critical patent/WO2001072048A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105Projection 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
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/005Projectors using an electronic spatial light modulator but not peculiar thereto
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2073Polarisers in the lamp house
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/315Modulator illumination systems
    • H04N9/3167Modulator illumination systems for polarizing the light beam

Abstract

In an image projector (8, 68), a light source (14) illuminates a plate-type polarizing beam splitter (40) that transmits P-polarized light rays and reflects S-polarized light rays (34). The P-polarized range light rays transmit through a green filter (841) and impinge on a first reflective LCD light valve (261). The S-polarized light rays strike a dichroic filter (48), which divides them into red and blue light rays (44, 46) that impinge on respective second and third LCD light valves (262, 263). Green light rays impinging on illuminated state pixels on the first LCD light valve are reflected with a 90° polarization change and are reflected by the polarizing beam splitter toward the projection lens. Red and blue light rays impinging on illuminated state pixels on the second and third LCD light valves are reflected with a 90° polarization change and transmit through the polarizing beam splitter toward the projection lens.
PCT/US2001/009039 2000-03-23 2001-03-21 Color video projection system employing reflective liquid crystal display devices WO2001072048A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001250910A AU2001250910A1 (en) 2000-03-23 2001-03-21 Color video projection system employing reflective liquid crystal display devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/535,427 2000-03-23
US09/535,427 US6661475B1 (en) 2000-03-23 2000-03-23 Color video projection system employing reflective liquid crystal display device

Publications (2)

Publication Number Publication Date
WO2001072048A2 WO2001072048A2 (en) 2001-09-27
WO2001072048A3 true WO2001072048A3 (en) 2002-02-14

Family

ID=24134169

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/009039 WO2001072048A2 (en) 2000-03-23 2001-03-21 Color video projection system employing reflective liquid crystal display devices

Country Status (3)

Country Link
US (4) US6661475B1 (en)
AU (1) AU2001250910A1 (en)
WO (1) WO2001072048A2 (en)

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WO2005060265A1 (en) * 2003-12-15 2005-06-30 Koninklijke Philips Electronics N.V. System for improving colour purity for a wide colour gamut scrolling colour projection system
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US20050219429A1 (en) * 2004-04-05 2005-10-06 Cheng-Yu Huang Bevel gradient dichroic film for liquid crystal on silicon display and method for testing the same
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US7961393B2 (en) 2004-12-06 2011-06-14 Moxtek, Inc. Selectively absorptive wire-grid polarizer
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US7686453B2 (en) * 2005-12-19 2010-03-30 3M Innovative Properties Company High contrast liquid crystal display and projection system using same
US7673993B2 (en) * 2005-12-22 2010-03-09 3M Innovative Properties Company Projection system using reflective polarizers
US8755113B2 (en) 2006-08-31 2014-06-17 Moxtek, Inc. Durable, inorganic, absorptive, ultra-violet, grid polarizer
US7789515B2 (en) 2007-05-17 2010-09-07 Moxtek, Inc. Projection device with a folded optical path and wire-grid polarizer
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Also Published As

Publication number Publication date
US6661475B1 (en) 2003-12-09
US7375772B2 (en) 2008-05-20
US20060238665A1 (en) 2006-10-26
WO2001072048A2 (en) 2001-09-27
AU2001250910A1 (en) 2001-10-03
US7072003B2 (en) 2006-07-04
US7347559B2 (en) 2008-03-25
US20040085634A1 (en) 2004-05-06
US20070035700A1 (en) 2007-02-15

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