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WO1996021996A2 - Separation de la lumiere en pixels couleur dans un dispositif de projection - Google Patents

Separation de la lumiere en pixels couleur dans un dispositif de projection Download PDF

Info

Publication number
WO1996021996A2
WO1996021996A2 PCT/SE1996/000016 SE9600016W WO9621996A2 WO 1996021996 A2 WO1996021996 A2 WO 1996021996A2 SE 9600016 W SE9600016 W SE 9600016W WO 9621996 A2 WO9621996 A2 WO 9621996A2
Authority
WO
WIPO (PCT)
Prior art keywords
matrix
light
colour
microlenses
image generating
Prior art date
Application number
PCT/SE1996/000016
Other languages
English (en)
Other versions
WO1996021996A3 (fr
Inventor
Stig Berglund
Original Assignee
Optica Nova Onab Ab
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
Priority claimed from SE9500149A external-priority patent/SE9500149D0/xx
Priority claimed from SE9502529A external-priority patent/SE9502529D0/xx
Priority claimed from SE9503107A external-priority patent/SE9503107D0/xx
Application filed by Optica Nova Onab Ab filed Critical Optica Nova Onab Ab
Publication of WO1996021996A2 publication Critical patent/WO1996021996A2/fr
Publication of WO1996021996A3 publication Critical patent/WO1996021996A3/fr

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]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/363—Image reproducers using image projection screens
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/604—Polarised screens
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/324—Colour aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing
    • 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
    • H04N9/3108—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 by using a single electronic spatial light modulator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/365—Image reproducers using digital micromirror devices [DMD]

Definitions

  • projection screens which are partly for use with spectrally broad- banded light and partly of the principally, in relation to the screen, centrally illuminated type.
  • light is directed at different angles of incidence from the various illumination sources against the IGD.
  • the light first hits a positive microlens matrix with a positive lens for each of the different colour groups which together form an image spot and that focus the various colours towards separate negative tilted microlenses or microprisms, which focus the light through the middle of the respective colour pixel elements.
  • a tilted microlens is defined as a microlens that is deflecting a through the middle of the lens passing light ray, so that the deflection is different from the deflection that a light ray should have if the tangential surface at the middle of the lens were parallel to the plane of the microlens matrix itself.
  • the first matrix on the out-put side consists of positive microlenses collimating the from the pixel apertures coming light.
  • the second matrix consists of microprisms deflecting the light into the middle of the entrance pupil of the projection lens.
  • the two microlens matrices on the entrance side can be placed on either side of a sheet of glass.
  • the microprisms are having the same purpose as a very compact colour corrected field lens.
  • microlens matrices is also applicable on the projectors in the first category by instead using a positive microlens on the entrance side for each pixel.
  • One of the fundamental principles in achieving the purposes of one aspect of the invention is using time multiplexing possibly in combination with spatial multiplexing by, in one and the same IGD, using pixels dedicated to different colours - either by using a colour separation technology or by allowing light to be blocked in cells that do not have the colour for which the cell is dedicated.
  • the colour expansion factor When k re which is from now on called the colour expansion factor, equals 0, is the colour reproduction the same in the projector and in the by the camera registered image. When k re equals 1 there is maximum colour expansion. The possibility of choosing the k re within said interval should be given in the projector's control unit.
  • At least three light sources can be used in order to represent a given point pO with the coordinates (x0,y0) in the colour diagram.
  • the luminous flux 0 in lumen is maximised for the point pO (or the inverse of the luminous flux is minimised for said point) .
  • m ⁇ O 683* ⁇ a i *S 1 *y 1 lumen (5)
  • i l
  • the visual impression of speckles in the picture is eliminated by placing a dispersive window (a despeckelator) for example based on the PDLC-technology described in the article
  • Fig. 11 schematically shows the design of a reflecting screen with microlenses as the foundation for the in figure 9 illustrated coating.
  • Fig. 12 schematically depicts a six-colour projector where both spatial and time multiplexing are used.
  • Fig. 14 schematically illustrates a six-colour projector with two IGDs with three-colour separation in each of the IGDs.
  • a negative microlens each i.e. the microlenses 19R, 19G and 19B in a second microlens matrix 323 and are then focused to a light valve each, i.e. the valves 1R, 1G and IB in an LCD matrix 1, whereby light in the three different colours hit the light-directing, possibly with diffractive structures colour corrected combinations 7R, 7G and 7B of microlenses and microprisms in the matrices 21 and 22.
  • the microlenses in the matrix 21 have an effective focal length equivalent to the distance between the LCD matrix 1 and the matrix 21.
  • the negative microlens 19G can be an ordinary on-axis lens.
  • Fig. 9 shows a cross section of a part of the projection screen 11, where the filter layer is designated with 41, the diffuser layer, which can be made from microfacets is designated with 42 and the foundation layer is designated with 43.
  • a unit CE On the output of the unit Ul is a unit CE, where colour expansion is performed in the case of the , via V and H or VH, incoming signal to the unit Ul has been registered with a smaller gamut than the projectors potential gamut.
  • the unit U2 which divides picture information from the unit CE into two partial images in consideration to the colour contents, one via Jl for the illumination sources 2r,2g,2b and one via J2 for the illumination sources 2R,2G,2B.
  • CC designates schematically a connection on the unit CE, by means of which the value of the colour expansion factor k re can be determined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

Agencement de projection et procédé destinés à la séparation de la lumière en pixels couleurs et entraînant un déplacement latéral de l'image projetée sur un écran (11). La lumière provenant de différentes couleurs, produite par des diodes laser (2), par exemple, est transmise à travers un dispositif de génération d'images (1K, 2K) et une lentille de projection (7). Le dispositif de génération d'images (1K, 2K) est de préférence un dispositif d'affichage à cristaux liquides du type à dispersion. Le déplacement latéral de l'image s'obtient par l'intermédiaire de microprismes, de microlentilles inclinées et/ou d'éléments de diffraction optiques situés du côté sortie du dispositif de génération d'images (1K, 2K) ou d'une lentille frontale désaxée.
PCT/SE1996/000016 1995-01-14 1996-01-12 Separation de la lumiere en pixels couleur dans un dispositif de projection WO1996021996A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9500149A SE9500149D0 (sv) 1995-01-14 1995-01-14 Färg-TV-projektor
SE9502529A SE9502529D0 (sv) 1995-07-10 1995-07-10 Digital TV- och multimedia-projektor
SE9503107A SE9503107D0 (sv) 1995-07-10 1995-09-08 Digital HDTV- och multimedia-projektor

Publications (2)

Publication Number Publication Date
WO1996021996A2 true WO1996021996A2 (fr) 1996-07-18
WO1996021996A3 WO1996021996A3 (fr) 1996-09-12

Family

ID=27355767

Family Applications (5)

Application Number Title Priority Date Filing Date
PCT/SE1996/000016 WO1996021996A2 (fr) 1995-01-14 1996-01-12 Separation de la lumiere en pixels couleur dans un dispositif de projection
PCT/SE1996/000015 WO1996021995A2 (fr) 1995-01-14 1996-01-12 Systeme de projection
PCT/SE1996/000019 WO1996021883A2 (fr) 1995-01-14 1996-01-12 Ecran de projection
PCT/SE1996/000017 WO1996021997A2 (fr) 1995-01-14 1996-01-12 Projection en relief
PCT/SE1996/000018 WO1996021992A2 (fr) 1995-01-14 1996-01-12 Procede de reproduction d'images avec un nombre accru de couleurs

Family Applications After (4)

Application Number Title Priority Date Filing Date
PCT/SE1996/000015 WO1996021995A2 (fr) 1995-01-14 1996-01-12 Systeme de projection
PCT/SE1996/000019 WO1996021883A2 (fr) 1995-01-14 1996-01-12 Ecran de projection
PCT/SE1996/000017 WO1996021997A2 (fr) 1995-01-14 1996-01-12 Projection en relief
PCT/SE1996/000018 WO1996021992A2 (fr) 1995-01-14 1996-01-12 Procede de reproduction d'images avec un nombre accru de couleurs

Country Status (1)

Country Link
WO (5) WO1996021996A2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4455771B2 (ja) * 1999-04-12 2010-04-21 ドイッチェ テレコム アーゲー プロジェクションスクリーン上のスペックル形成を低減するための方法および装置
DE19924519A1 (de) 1999-04-12 2000-10-19 Deutsche Telekom Ag Verfahren und Vorrichtung zur Reduktion der Speckelsbildung an einem Projektionsschirm
JP2001339742A (ja) * 2000-03-21 2001-12-07 Olympus Optical Co Ltd 立体映像プロジェクション装置、及びその補正量演算装置
TW528920B (en) 2001-12-13 2003-04-21 Sony Corp Screen, the manufacturing method for the same, and image display system
JP4111011B2 (ja) 2002-03-14 2008-07-02 ソニー株式会社 投影用スクリーン
US7597447B2 (en) 2004-07-14 2009-10-06 Honeywell International Inc. Color correcting contrast enhancement of displays
DE102007011561B4 (de) * 2007-03-02 2016-03-17 Seereal Technologies S.A. Einrichtung zur Korrektur der Wellenlängenabhängigkeit in beugungsbasierten optischen Systemen
DE102007011560A1 (de) * 2007-03-02 2008-09-04 Seereal Technologies S.A. Vorrichtung zur Minimierung der verbeugungsbedingten Dispersion in Lichtmodulatoren
CN108227353B (zh) * 2016-12-14 2020-12-22 中强光电股份有限公司 光源模块以及投影装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214638A1 (de) * 1971-03-29 1972-10-12 Hubbard N Projektionsschirm
JPS52130325A (en) * 1976-04-23 1977-11-01 Schudel Conrad Movie screen
DE3214021A1 (de) * 1982-04-16 1983-10-20 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten Vorrichtung zur erzeugung und darstellung dreidimensionaler bilder
EP0107091B1 (fr) * 1982-09-29 1990-03-14 Honeywell Inc. Système de télévision en stéréo
US5272473A (en) * 1989-02-27 1993-12-21 Texas Instruments Incorporated Reduced-speckle display system
CN1017192B (zh) * 1989-03-23 1992-06-24 清华大学 激光散斑接触网屏及制造用的光学系统
DE69117092T2 (de) * 1990-04-26 1996-10-02 Bayer Ag RGB-Farbdatenbank und Verfahren zu ihrer Erzeugung
US5317426A (en) * 1990-11-26 1994-05-31 Konica Corporation Color estimation method for expanding a color image for reproduction in a different color gamut
JP3071947B2 (ja) * 1992-06-12 2000-07-31 シャープ株式会社 投影型カラー画像表示装置
US5313479A (en) * 1992-07-29 1994-05-17 Texas Instruments Incorporated Speckle-free display system using coherent light
US5500921A (en) * 1992-10-05 1996-03-19 Canon Information Systems, Inc. Method and apparatus for printing high fidelity color reproductions of colors displayed on a monitor
JPH06202096A (ja) * 1992-12-28 1994-07-22 Sony Corp 映像プロジェクタ装置
US5323249A (en) * 1993-01-12 1994-06-21 E. I. Du Pont De Nemours And Company Method for reproducing color images having one color gamut with a device having a different color gamut
SE9300958L (sv) * 1993-03-23 1994-09-24 Nova Onab Optica Ab Offset projektor
EP0626783B1 (fr) * 1993-05-28 1998-10-28 Eastman Kodak Company Procédé et appareil pour déteminer les limites de la gamme et dispositif de description de la gamme
US5534950A (en) * 1993-10-04 1996-07-09 Laser Power Corporation High resolution image projection system and method employing lasers

Also Published As

Publication number Publication date
WO1996021996A3 (fr) 1996-09-12
WO1996021883A2 (fr) 1996-07-18
WO1996021997A2 (fr) 1996-07-18
WO1996021992A3 (fr) 1996-09-19
WO1996021883A3 (fr) 1996-09-12
WO1996021995A3 (fr) 1996-09-19
WO1996021995A2 (fr) 1996-07-18
WO1996021997A3 (fr) 1996-09-12
WO1996021992A2 (fr) 1996-07-18

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