EP1456715A1 - Systeme de projection - Google Patents

Systeme de projection

Info

Publication number
EP1456715A1
EP1456715A1 EP02791619A EP02791619A EP1456715A1 EP 1456715 A1 EP1456715 A1 EP 1456715A1 EP 02791619 A EP02791619 A EP 02791619A EP 02791619 A EP02791619 A EP 02791619A EP 1456715 A1 EP1456715 A1 EP 1456715A1
Authority
EP
European Patent Office
Prior art keywords
projection
radiation
intensity
way
hidden
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.)
Withdrawn
Application number
EP02791619A
Other languages
German (de)
English (en)
Inventor
Thomas Taubenberger
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1456715A1 publication Critical patent/EP1456715A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G03B21/13—Projectors for producing special effects at the edges of picture, e.g. blurring
    • 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
    • G03B21/10—Projectors with built-in or built-on screen
    • 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
    • H04N9/3147—Multi-projection systems

Definitions

  • the invention relates to a projection system with a projection device and a blending device.
  • a large image is generated by projecting radiation onto a projection screen, such as a screen.
  • a projection screen such as a screen.
  • several, usually many individual projection systems are used, the individual projections of which are combined to form an overall projection, the large image projection.
  • the large image is therefore composed of several, usually many individual images, each generated by one of the individual projections.
  • FIG. 4 shows a sketch of a structure 400 of a large-screen projection system 400 with a first 401 and a second 402 projector and a large-screen screen 408.
  • the first 401 and the second 402 projector each send out projection radiation in the form of a corresponding radiation or projection cone 403 or 404.
  • Corresponding projections 405 and 406 become visible to an observer when the respective projection radiation 403 or 404 hits the large screen 408.
  • Such an overlap or overlap is also referred to as cross-fading or cross-fading.
  • Brightness falsifications occur in the cross-fade areas, which become disturbing for an observer of the projected large image, since the radiation intensities of the overlapping projections or projection radiations add up (cross-fading problem).
  • This fading problem is outlined in FIG. 5 on the basis of a corresponding, added intensity curve 500 over a screen width 504 of two projections 501 and 502 covering one part 503 of the screen.
  • the intensity of the individual projections (Fig. 3, 301, 302) has to start from (Fig. 3, 306) the coverage area (Fig. 3, 303) to an edge (Fig. 3, 307) of the coverage area (Fig. 3, 303) or the respective individual projection (Fig. 3, 301, 302) can be continuously reduced (Fig. 3).
  • Such a uniform (added) intensity curve 300 of two 306-307 projections 301 and 302 overlapping in a part 303 and reduced in intensity towards the edge 307 over a screen width 304 is shown in FIG.
  • a further problem can arise which results in uneven brightness distributions on a projection screen.
  • LCD projectors in LCD projection systems or DLP projectors in DLP projection systems which consequently use LCD or DLP technology for image generation and are known, for example, from [3], radiate in addition to those required for image generation Projection radiation still clearly visible scattered radiation or stray light.
  • This scattered radiation or this scattered light emerges in addition to an image-generating element, an LCD or DLP module, in the case of a respective LCD or DLP projector and also causes a falsification of intensity on the projection screen in addition to the projected image.
  • Projection systems with at least two combined individual projections for example from [1] known LCD or DLP projection systems, generate the uniform, non-distracting and thus desired intensity curve shown in FIG. 3 in the respective individual projections electronically (soft edge blending ).
  • the described soft edge blending technique is from the
  • the invention is therefore based on the object of specifying a projection system which is easier and cheaper to implement than the known ones and which enables better and more efficient cross-fading in projections.
  • the projection system has a projection device set up to generate a projection by emitting a projection radiation, and a glare device which is introduced into a beam path of the projection radiation in such a way that part of the projection is masked out in such a way that a continuous part is hidden in the masked part of the projection Reducing the intensity of the projection radiation.
  • a projection is understood to mean a multidimensional radiation field generated by the projection radiation emitted by the projection device, generally a projection cone, with a predetermined intensity distribution of the projection radiation.
  • the beam path is to be understood as a path covered by the emitted projection radiation.
  • the projection can be made visible on the projection screen.
  • Vignetting is a physically determined decrease in the brightness of an image towards the edge of the image. This is caused by shadowing edge rays through an aperture. Not all rays emanating from a point of light reach a projection surface. Some of these rays are shadowed. This leads to a decreasing brightness curve towards the edge of the picture.
  • a particular advantage of the invention is that it provides a mechanical (hardware) solution to the fading problem described.
  • the invention also has the advantage that the projection system according to the invention is independent of a projector type used in each case.
  • the invention can be implemented with any type of projector, for example an LCD or DLP projector.
  • the invention has the advantage that an adjustment, i.e. an adaptation of the hidden part to projection conditions is considerably simplified, for example by appropriate shaping or incorporation of the glare device into the beam path.
  • the hidden part can be changed and thus adapted.
  • the invention has the advantage that projection scattered light escaping through the inventive projection system, such as that in LCD and DLP projectors, can be eliminated.
  • the hidden part of the projection lies in an edge region of the projection.
  • the intensity of the projection radiation can thus be reduced in a direction towards the edge of the projection.
  • the intensity in the masked-out part of the projection is reduced to zero.
  • the radiation intensity can be continuously reduced to zero right up to the edge of the projection.
  • a linear functional specification is expedient because of the simple implementation, i.e. a linear reduction in radiation intensity.
  • Other functional regulations such as a logarithmic regulation for the course of the reduction in the radiation intensity or a regulation that can be described by a polynomial, are possible.
  • a light-tight material such as aluminum or a metal can be used as the material for the glare device.
  • a non-light-tight material such as tinted plexiglass or tinted filter glass
  • a non-light-tight material such as tinted plexiglass or tinted filter glass
  • the reduction in the radiation intensity and its functional course is achieved by filter coating the material and / or by changing the optical transparency of the material itself.
  • the intensity profiles adjust accordingly.
  • the flexibility of the projection system according to the invention can be increased in that the glare device is slidably inserted into the beam path in such a way that the hidden part can be changed.
  • This flexibility can be achieved, for example, by simply changing an insertion depth and / or changing the insertion location, in each case by shifting the blind device in a corresponding direction within the beam path.
  • a corresponding mechanical holder with vertical and horizontal guides is provided for one or more of the inventive glare devices.
  • any type of projector such as an LCD or DLP projector [1] can be used in further developments.
  • the plurality of glare devices can be introduced into the beam path in such a way that a part of the projection that is not masked out has the specifiable shape or pattern.
  • a shape or such a pattern can, for example, be a projection cone with a rectangular base area.
  • the projection system according to the invention has a projection screen for displaying the projection.
  • a large projection unit is realized in such a way that at least two of the inventive projection systems are aligned with one another in such a way that the respectively hidden parts of the respective projection overlap at least partially.
  • the overlapping takes place in such a way that a constant course of an intensity composed of the intensities of the two projection radiations is established for the covered part.
  • a large projection unit as large as possible, such as is desired for demonstration purposes at trade fairs or similar demonstration events, it is expedient to use or combine several or many of the projection units according to the invention, which are aligned with one another in such a way that a large projection is also possible a predefinable shape, in particular a large projection cone with a rectangular base.
  • Such a large projection cone then generates a regular large projection image with transitions or cross-fades between the individual projections that are barely visible to an observer when hitting a large projection screen.
  • H-EBS Optical Hardware Edge Blending System
  • FIG. 2 shows a sketch of a multi-image projection with a multi-image projection system with an optical hardware edge blending system according to an exemplary embodiment
  • FIG. 4 sketch of a structure of a multi-image project system with two projection systems combined with one another;
  • Figure 5 Sketch with a composite, uneven intensity curve in two combined projection systems with cross-fading problem.
  • FIG. 6 sketch of a structure of a hardware edge blending (H-EBS) multi-image project system with two combined H-EBS projection systems;
  • H-EBS hardware edge blending
  • H-EBS Optical Hardware Edge Blending System
  • FIG. 6 shows a structure 600 of a large-image projection system, in this case a two-image projection system, a so-called hardware edge blending (large-image projection) system 601 (H-EBS).
  • H-EBS hardware edge blending (large-image projection) system 601
  • the H-EBS 600 shown comprises a first 601 and a second 602 H-EBS projector, in this case an LCD projector, and a large screen 608.
  • any projector for example a DLP projector, can be used with the H-EBS.
  • the first 601 and the second 602 H-EBS projector each send out projection radiation in the form of a corresponding radiation or projection cone 603 or 604.
  • Corresponding (individual) projections 605 and 606 are visible to an observer when the respective projection radiation 603 or 604 strikes the large screen 608.
  • H-EBS diaphragm devices 609, 610 are introduced into the projection cones or beam paths 603, 604 of the H-EBS projectors 601, 602 (FIG. 1),
  • the two H-EBS projectors 601 and 602 are aligned with one another in such a way that both projections 605 and 606 are visible side by side on the large screen 608.
  • the two projections 605 and 606 overlap (crossfade or crossfade).
  • FIG. 2 shows a structure 200 or an H-EBS single projection 200 through one of the two H-EBS projectors 601 or 602, 201.
  • Beam path 202 of the H-EBS projector 201 introduced H-EBS glare device 609 or 610, 206 (see also FIG. 1).
  • the H-EBS diaphragm device 206 is attached in the direction of the beam path 202 after a projector optics 207 in front of the H-EBS projector 201.
  • a (radiation) diffraction effect 205 on a glare edge 208 of the H-EBS blending device 206, which (radiation) diffraction effect 205 is known from [2], ensures that a projection 203, in this case a projected image 203, 204 is faded out almost uniformly towards an image edge 209.
  • the intensity curve 210 in the case of a single projection, in this case the projection 203, is corresponding to the uniform (added) intensity curve 300 shown in FIG. 3 with two 306-307 projections that overlap in one part 303 and are reduced in intensity towards the edge 307.
  • This intensity reduction takes place in a mirror-image manner by means of a corresponding structure in the second H-EBS projector 601 or 602, so that the uniform (added) intensity curve 300 according to FIG. 3 is obtained during the cross-fading.
  • FIG 1 shows the H-EBS blending device 609, 610, 206 and 100 (introduced into the beam path 202 of the H-EBS projector 201).
  • the H-EBS diaphragm device 100 has a rectangular front plate 103, on which vertical 104 and horizontal 105 guides for mounting vertically 102 and horizontally 101 diaphragms are attached.
  • the screens 101, 102 each have a straight, non-curved screen edge 111.
  • the panels 101, 102 can be moved within their respective guides 104 and 105 and can be fixed in a desired position by means of locking options 106.
  • the front plate 103 is attached or aligned in front of the projector optics 207 of the H-EBS projector 201 in such a way that a horizontal axis of symmetry 109 and a vertical axis of symmetry 110 of the front plate 103 each coincide with an optical axis 108 of the projected radiation cone 202.
  • the horizontal and vertical arrangement of the diaphragms 101, 102, as well as the free displacement of the diaphragms 101, 102 within their guides 104, 105 make it possible for any, in this case any rectangular, openings 107 to pass through the projection radiation to be adjustable.
  • a different shape for the diaphragms 101, 102 or a different line arrangement for the diaphragm edges 111 also enable differently shaped passage openings 107, for example curved passage openings 107.
  • This flexibility in the adjustment of the passage opening 107 allows all edges of a projected image to be variably blended and the cross-fading to be flexibly adapted (adjustment).
  • the adjustment of the crossfade or the adjustment is flexible and easy. - The cost is significantly reduced compared to soft edge blending solutions.
  • the H-EBS 600 is independent of the type of projector used and its input signal source.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un système de projection comportant un dispositif de projection, servant à produire une projection par émission d'un rayonnement de projection, et un dispositif d'obturation qui est disposé dans le chemin optique du rayonnement de projection de façon qu'une partie de la projection soit cachée, de sorte qu'il se produit une réduction continue de l'intensité du rayonnement de projection dans la partie cachée de la projection.
EP02791619A 2001-12-21 2002-12-09 Systeme de projection Withdrawn EP1456715A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10163481 2001-12-21
DE10163481 2001-12-21
PCT/DE2002/004519 WO2003056389A1 (fr) 2001-12-21 2002-12-09 Systeme de projection

Publications (1)

Publication Number Publication Date
EP1456715A1 true EP1456715A1 (fr) 2004-09-15

Family

ID=7710521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02791619A Withdrawn EP1456715A1 (fr) 2001-12-21 2002-12-09 Systeme de projection

Country Status (5)

Country Link
US (1) US20050083492A1 (fr)
EP (1) EP1456715A1 (fr)
JP (1) JP2005513574A (fr)
CN (1) CN1605044A (fr)
WO (1) WO2003056389A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2312985T3 (es) * 2003-03-26 2009-03-01 Matsushita Electric Works, Ltd. Procedimiento para crear un filtro de brillo y sistema de creacion de espacio virtual.
JP2005165224A (ja) * 2003-12-05 2005-06-23 Olympus Corp 画像投影表示装置
WO2005064933A1 (fr) * 2003-12-22 2005-07-14 Thomson Licensing Masquage de la lumiere pour un systeme d'affichage segmente
EP1774796B1 (fr) * 2004-07-08 2015-09-02 Imax Corporation Equipement et methodes pour afficher des images de haute resolution au moyen des plusieurs affichages de projection
US7441902B2 (en) * 2004-10-27 2008-10-28 Symbol Technologies, Inc. Large size image projection
US7278746B2 (en) * 2005-04-08 2007-10-09 Barco N.V. Motorized blend alignment tool
US20070229778A1 (en) * 2006-03-28 2007-10-04 Soohyun Cha Time-multiplexed 3D display system with seamless multiple projection
GB2486275B (en) 2010-12-10 2013-10-09 Global Immersion Ltd Optical mask
US8817044B2 (en) * 2012-06-12 2014-08-26 Christie Digital Systems Usa, Inc. Method, system and apparatus for blending overlapping images
DE102016013994B4 (de) * 2016-11-23 2019-01-17 domeprojection.com GmbH Verfahren zur automatischen Erzeugung einer optischen Blendmaske
CN109212878B (zh) * 2018-09-27 2021-07-27 明基智能科技（上海）有限公司 投影系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505558A (en) * 1984-02-14 1985-03-19 General Electric Company Method of modifying projected images
AU1902395A (en) * 1994-03-17 1995-10-03 Thomson Training & Simulation Limited Edge-blending of projected images
CA2227920A1 (fr) * 1998-01-27 1999-07-27 Chung-Shan Institute Of Science And Technology Methode et dispositif d'elimination des bordures de deux films de projection
JP4309549B2 (ja) * 2000-03-17 2009-08-05 オリンパス株式会社 マルチディスプレイ装置、マルチディスプレイシステム、マルチディスプレイ装置の調整方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03056389A1 *

Also Published As

Publication number Publication date
US20050083492A1 (en) 2005-04-21
WO2003056389A1 (fr) 2003-07-10
CN1605044A (zh) 2005-04-06
JP2005513574A (ja) 2005-05-12

Similar Documents

Publication Publication Date Title
DE69907936T2 (de) Verfahren und vorrichtung zur erzeugung einer nahtlosen verteilten darstellung
DE60132648T2 (de) Projektionssystem mit mehreren Projektoren
DE19851000C2 (de) Projektionsanordnung
EP1695562B1 (fr) afficheur autostéréoscopique à poursuite de position pour plusieurs utilisateurs
DE4324849C2 (de) Videosystem zum Erzeugen eines Farbvideobilds auf einem Schirm
DE2656170C3 (de) Fernsehprojektionsanordnung
DE2223197B2 (de) Einrichtung zur Simulation der Aussicht aus einer Kanzelattrappe bei einem Ausbildungsgerät für Flugzeugpiloten
DE102005058586B4 (de) Wiedergabevorrichtung zur autostereoskopen Wiedergabe von dreidimensionalen Darstellungen
EP0309528A1 (fr) Systeme d'affichage stereoscopique.
DE102014009143B4 (de) Kraftfahrzeug-Kameravorrichtung mit steuerbarer Aktivbeleuchtung, Kraftfahrzeug mit einer Kameravorrichtung und Verfahren zum Erzeugen von Kamerabildern
WO2003056389A1 (fr) Systeme de projection
DE10200134A1 (de) Hologrammbildschirm und Hologrammanzeige
EP1434434A1 (fr) Autocalibration d'un système de projection au moyen de projecteurs multiples
DE602004005515T2 (de) Optisches Projektionssystem
DE69929622T2 (de) Projektionssystem
EP1554890A1 (fr) Ensemble pour projeter une image sur une surface de projection et optique de transformation associee
DE3100584C2 (de) Vorrichtung für Sichtsimulatoren
DE2610246C3 (de) Farbbild-Projektionsvorrichtung
EP1029730B1 (fr) Dispositif d'affichage pour véhicules avec panneau d'affichage disposé dans la direction du regard du conducteur
DE19907345B4 (de) Vorrichtung zum Abbilden eines als Raster von Bildpunkten darstellbaren Bildes auf einem Schirm
WO2001027694A1 (fr) Dispositif pour projeter des informations sur une surface inclinee
WO1990002969A1 (fr) Dispositif pour devier un faisceau lumineux
DE19654440A1 (de) Vorrichtung und Verfahren zur großflächigen Darstellung von Informationen mittels Flüssigkeitskristallanzeigen
DE3537369C2 (fr)
EP4232788A1 (fr) Étalonnage de dispositif de génération de champ lumineux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040308

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

17Q First examination report despatched

Effective date: 20041223

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20060607