EP0603465B1 - Method and device for optical presentation of information - Google Patents
Method and device for optical presentation of information Download PDFInfo
- Publication number
- EP0603465B1 EP0603465B1 EP93114019A EP93114019A EP0603465B1 EP 0603465 B1 EP0603465 B1 EP 0603465B1 EP 93114019 A EP93114019 A EP 93114019A EP 93114019 A EP93114019 A EP 93114019A EP 0603465 B1 EP0603465 B1 EP 0603465B1
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- EP
- European Patent Office
- Prior art keywords
- projection
- projected area
- light valve
- picture
- projected
- 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.)
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
Definitions
- the invention relates to a method for optical representation of information according to claim 1 and an arrangement for optical Representation according to the preamble of claim 5.
- FR-A-2 607 301 presents an arrangement for optical display of information on a transparent projection surface in transmitted light projection with several projection modules before, with a shadow projection from each projection module of an image part can be generated on the projection surface and wherein the shadow projections of the image parts on the projection surface can be joined together to form a real overall picture. So far is also a method for optical from FR-A-2 607 301 Presentation of information on a transparent Projection surface in transmitted light projection with several projection modules derivable. Each projection module a shadow projection of a part of the image on the projection surface generated. In addition, the shadow projections the parts of the image on the projection surface to a real overall picture joined together. A disadvantage of this arrangement however, their overall design and the procedure has been proven in connection therewith.
- this arrangement is in itself due to the many individual components are relatively expensive to build, not very compact and therefore very prone to failure. So includes this device next to the light source, the optical fiber, the light valve in the form of a liquid crystal cell and the transparent projection surface including a condenser, around a parallel light beam towards the light valve align a lens to form the real image, a field or. Collective lens to adjust the divergence to a value in the Reduce order of magnitude of typically 1 to 3 ° and, if necessary some mirrors to match the overall length of the Shorten projection modules. Because of this multitude of This arrangement also makes individual components very cost-intensive Manufacturing, maintenance and solution Repair the entire assembly.
- this device is based on an optical principle of operation, which is relatively complicated and at which large-scale presentation of information is not easy ensures a bright, high-contrast and at the same time homogeneous image.
- This is how the light source becomes via the optical fiber supplied light in the condenser first to a parallel Beams of light formed. The parallel light beam from the The condenser is then passed through the light valve and forwarded to the lens, which itself is the real image forms. The real image generated is finally through the field or.
- Collective lens thrown on the screen.
- JP-A-3 085 879 An arrangement is also known from JP-A-3 085 879, the adjustment costs of an optical projection unit to reduce positioning.
- neighboring parts of the picture among a variety of image parts through each optical Projection unit projects while partially overlapping are.
- the overlapped parts of the image are adjusted electrically, such that the sum of the brightness in relation to the light of neighboring projection units constant and the specific Permeability of a liquid crystal light device of the image part is gradually varied in full white level.
- This arrangement also includes a variety of individual ones Components.
- overlaps between adjacent ones are corrected Image parts by means of an electrical setting.
- JP-A-3 017 615, DE-A-29 24 101 and EP-A-0 349 404, generally show optical arrangements, each one Light valve in the form of a liquid crystal cell to order enlarged display of information on corresponding Show projection surfaces.
- the invention is based on the object, a method and an arrangement for the optical display of information To make available the simple, compact and prone to failure is inexpensive and also for the viewer a large display of information a bright, provides high-contrast and at the same time homogeneous image.
- the configuration according to the invention with a few individual Components can be a particularly simple, but at the same time very compact and therefore less sensitive to interference as well as cost-effective method for optical representation of information with multiple projection modules a transparent projection surface in transmitted light projection receive.
- the inventive configuration not least because of the few individual components a construction that is particularly simple, yet compact Arrangement for the optical display of information a transparent projection surface in transmitted light projection achieve with multiple projection modules.
- the arrangement as a whole is very susceptible to faults reduced, if not excluded.
- the arrangement therefore also has a long service life.
- the projection distance depends on the existing, optically unusable peripheral edge of the Liquid crystal cell, from the opening angle of the light source, for example an optical fiber, and of the desired magnification selected so that the approx. 10% enlarged shadow images from the liquid crystal cells be joined together that the uncontrolled edge surfaces the liquid crystal cells are hidden and the controlled surfaces of the liquid crystal cells on the projection surface to be strung together without gaps.
- the projection module 1 shows the principle of image expansion to clarify the perspective using projection technology View of a projection module 1.
- the projection module 1 consists of a light source 2 with a defined radiation characteristic 2 ⁇ for backlighting the information to be displayed.
- light source 2 exists from a light guide bundle 11 with a radiation characteristic 2 ⁇ of approx. 60 °.
- the radiation characteristic is 2 ⁇ the effective opening angle of a light guide.
- the effective opening angle of a light guide results from the half-width of the measured angle-dependent Radiation distribution at the fiber optic output when the fiber optic input is illuminated with a Lambertian spotlight.
- the light source 2 shines through a liquid crystal cell 3, which has a circumferential contacting edge 12.
- the Liquid crystal cell 3 acts as a light valve and contains the information to be displayed.
- the scattering projection surface 4 forms the level of observation, on which the information in shown on an enlarged scale.
- the projection distance d between the projection surface 4 and the liquid cell 3 depends on the desired magnification factor.
- FIG. 2 the relationships that must be observed in order to obtain a complete picture of the information to be displayed by means of two projection modules 1 are shown on the basis of two adjacent projection modules 1.
- the light sources 2 each irradiate a liquid crystal cell 3 with an opening angle of approximately 60 °, each of which has a height H2 and which contain parts of the information to be displayed.
- the method uses the magnification effect of a shadow projection in the divergent beam path of a light source.
- the light source 2 used for each individual module 1 must meet this condition, i.e. in addition to those listed Outputs of light guides with halogen spotlights defined radiation pattern can be used.
- the arranged between the light source 2 and the viewer 15 Projection area 4 must have a scattering area, e.g. a Be a focusing screen.
- the spreading characteristic can be determined by the Use of thin, white colored glasses or through Foils (opal effect) can be significantly improved. One can this effect by combining a spreading surface with reach a Fresnel lens.
- the aperture 5 through the inner Inclined of the housing 8 is formed. Because the magnification needed usually less than 10%, can be further optical Aids are dispensed with. A slight blur of the Figure is for viewing from a distance like it are usual for large projections, meaningless.
- Each projection module 1 is made a central light source unit 9 via flexible light guides 13, which end in polished end pieces 14 and the Form light source 2, fed with light. The light comes out these end pieces 14 at a defined angle 2 ⁇ and shines through the respective light valves, here liquid crystal cells 3 so that on the projection surface 4, which is arranged at a defined distance d from the light valves, from the partial projections of the image parts 6 for the viewer 15 a homogeneous overall picture 7 is created.
- the individual projection modules 1 are combined in a housing 8.
- the control the light valves, here the liquid crystal cells 3, takes place via control electronics 10.
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- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Business, Economics & Management (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Holo Graphy (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur optischen Darstellung
von Informationen nach Anspruch 1 und eine Anordnung zur optischen
Darstellung gemäß Oberbegriff des Anspruchs 5.The invention relates to a method for optical representation
of information according to claim 1 and an arrangement for optical
Representation according to the preamble of
Die FR-A-2 607 301 stellt eine Anordnung zur optischen Darstellung von Informationen auf einer transparenten Projektionsfläche in Durchlichtprojektion mit mehreren Projektionsmodulen vor, wobei von jedem Projektionsmodul eine Schattenprojektion eines Bildteiles auf der Projektionsfläche erzeugbar ist und wobei die Schattenprojektionen der Bildteile auf der Projektionsfläche zu einem reellen Gesamtbild aneinanderfügbar sind. Insoweit ist aus der FR-A-2 607 301 auch ein Verfahren zur optischen Darstellung von Informationen auf einer transparenten Projektionsfläche in Durchlichtprojektion mit mehreren Projektionsmodulen ableitbar. Dabei wird von jedem Projektionsmodul eine Schattenprojektion eines Bildteiles auf der Projektionsfläche erzeugt. Außerdem werden dabei die Schattenprojektionen der Bildteile auf der Projektionsfläche zu einem reellen Gesamtbild aneinandergefügt. Von Nachteil hat sich bei dieser Anordnung allerdings deren konstruktive Ausgestaltung insgesamt und damit zusammenhängend das Verfahren erwiesen.FR-A-2 607 301 presents an arrangement for optical display of information on a transparent projection surface in transmitted light projection with several projection modules before, with a shadow projection from each projection module of an image part can be generated on the projection surface and wherein the shadow projections of the image parts on the projection surface can be joined together to form a real overall picture. So far is also a method for optical from FR-A-2 607 301 Presentation of information on a transparent Projection surface in transmitted light projection with several projection modules derivable. Each projection module a shadow projection of a part of the image on the projection surface generated. In addition, the shadow projections the parts of the image on the projection surface to a real overall picture joined together. A disadvantage of this arrangement however, their overall design and the procedure has been proven in connection therewith.
Einerseits ist diese Anordnung an sich bereits aufgrund der vielen einzelnen Bauteile in ihrer Bauweise verhältnismäßig aufwendig, wenig kompakt und damit auch sehr störanfällig. So umfaßt diese Vorrichtung neben der Lichtquelle, dem Lichtwellenleiter, dem Lichtventil in Form einer Flüssigkristallzelle und der transparenten Projektionsfläche unter anderem einen Kondensor, um ein paralleles Lichtbündel auf das Lichtventil zu richten, ein Objektiv, um das Realbild zu bilden, eine Feld-bzw. Kollektivlinse, um die Divergenz auf einen Wert in der Größenordnung von typischerweise 1 bis 3° zu reduzieren und gegebenenfalls noch zusätzlich einige Spiegel, um die Baulänge des Projektionsmodules zu verkürzen. Aufgrund dieser Vielzahl von einzelnen Bauteilen stellt diese Anordnung zudem eine sehr kostenintensive Lösung hinsichtlich der Herstellung, Wartung und Reparatur der gesamten Anordnung dar.On the one hand, this arrangement is in itself due to the many individual components are relatively expensive to build, not very compact and therefore very prone to failure. So includes this device next to the light source, the optical fiber, the light valve in the form of a liquid crystal cell and the transparent projection surface including a condenser, around a parallel light beam towards the light valve align a lens to form the real image, a field or. Collective lens to adjust the divergence to a value in the Reduce order of magnitude of typically 1 to 3 ° and, if necessary some mirrors to match the overall length of the Shorten projection modules. Because of this multitude of This arrangement also makes individual components very cost-intensive Manufacturing, maintenance and solution Repair the entire assembly.
Andererseits basiert diese Einrichtung auf einem optischen Funktionsprinzip, das verhältnismäßig kompliziert ist und bei der großflächigen Darstellung von Informationen nicht ohne weiteres ein helles, kontrastreiches und zugleich homogenes Bild gewährleistet. So wird das aus der Lichtquelle über den Lichtwellenleiter zugeführte Licht in dem Kondensor zunächst zu einem parallelen Lichtbündel formiert. Das parallele Lichtbündel aus dem Kondensor wird sodann durch das Lichtventil hindurchgeführt und an das Objektiv weitergeleitet, welches selbst das Realbild bildet. Das erzeugte Realbild wird schließlich durch die Feld-bzw. Kollektivlinse auf den Bildschirm geworfen. Obschon die Divergenz auf einen Wert in der Größenordnung von 1 bis 3° mittels der zusätzlichen Feld- bzw. Kollektivlinse reduziert werden soll, ist dennoch eine Divergenz vorhanden. Allerdings soll es dank dieser geringfügigen verbleibenden Divergenz möglich sein, den notwendigen Platz für Trageinrichtungen der Feld- bzw. Kollektivlinse zu reservieren, ohne daß damit insoweit Lücken zwischen benachbarten Teilen des Bildes vorhanden sein sollen. Dieses verwendete Funktionsprinzip und die daraus resultierende Homogenität eines Gesamtbildes von Informationen hängt somit wesentlich von der Anordnung der vielen einzelnen Bauteile eines Projektionsmodules und derjenigen benachbarter Projektionsmodule ab, ist mithin in deren Herstellung, Montage und Reparatur ausgesprochen aufwendig.On the other hand, this device is based on an optical principle of operation, which is relatively complicated and at which large-scale presentation of information is not easy ensures a bright, high-contrast and at the same time homogeneous image. This is how the light source becomes via the optical fiber supplied light in the condenser first to a parallel Beams of light formed. The parallel light beam from the The condenser is then passed through the light valve and forwarded to the lens, which itself is the real image forms. The real image generated is finally through the field or. Collective lens thrown on the screen. Although the divergence to a value of the order of 1 to 3 ° by means of the additional field or collective lens can be reduced there is still a divergence. However, it should thanks to this slight remaining divergence the necessary space for supporting devices for the field or collective lens to reserve without gaps between adjacent parts of the image should be present. This principle of operation used and the resulting homogeneity an overall picture of information thus depends essentially from the arrangement of the many individual components Projection modules and those of neighboring projection modules ab, is therefore pronounced in their manufacture, assembly and repair complex.
Aus der JP-A-3 085 879 ist des weiteren eine Anordnung bekannt, um die Einstellungskosten einer optischen Projektionseinheit bei der Positionierung zu vermindern. Dabei werden benachbarte Bildteile unter einer Vielzahl von Bildteilen durch jede optische Projektionseinheit projiziert, während sie teilweise überlappt sind. Die überlappten Bildteile werden elektrisch eingestellt, derart, daß die Summe der Helligkeit in bezug auf das Licht von benachbarten Projektionseinheiten konstant und die spezifische Durchlässigkeit einer Flüssigkristall-Lichteinrichtung des Bildteiles schrittweise im vollständigen Weißpegel variiert wird. Diese Anordnung umfaßt ebenfalls eine Vielzahl von einzelnen Bauteilen. Zudem erfolgt eine Korrektur von Überlappungen benachbarter Bildteile mittels einer elektrischen Einstellung.An arrangement is also known from JP-A-3 085 879, the adjustment costs of an optical projection unit to reduce positioning. In the process, neighboring parts of the picture among a variety of image parts through each optical Projection unit projects while partially overlapping are. The overlapped parts of the image are adjusted electrically, such that the sum of the brightness in relation to the light of neighboring projection units constant and the specific Permeability of a liquid crystal light device of the image part is gradually varied in full white level. This arrangement also includes a variety of individual ones Components. In addition, overlaps between adjacent ones are corrected Image parts by means of an electrical setting.
Die JP-A-3 017 615, die DE-A-29 24 101 und die EP-A-0 349 404, zeigen ganz allgemein optische Anordnungen, die jeweils ein Lichtventil in Form einer Flüssigkristallzelle umfassen, um eine vergrößerte Darstellung von Informationen auf entsprechenden Projektionsflächen abzubilden.JP-A-3 017 615, DE-A-29 24 101 and EP-A-0 349 404, generally show optical arrangements, each one Light valve in the form of a liquid crystal cell to order enlarged display of information on corresponding Show projection surfaces.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren und eine Anordnung zur optischen Darstellung von Informationen zur Verfügung zu stellen, das bzw. die einfach, kompakt und störunanfällig sowie kostengünstig ist und für den Betrachter auch bei einer großflächigen Darstellung von Informationen ein helles, kontrastreiches und zugleich homogenes Bild bereitstellt.The invention is based on the object, a method and an arrangement for the optical display of information To make available the simple, compact and prone to failure is inexpensive and also for the viewer a large display of information a bright, provides high-contrast and at the same time homogeneous image.
Diese Aufgabe wird auf überraschend einfache Weise durch die
Merkmale des Anspruchs 1 in verfahrenstechnischer Hinsicht und
des Anspruchs 5 in vorrichtungstechnischer Hinsicht gelöst.This task is done in a surprisingly simple way by
Features of claim 1 in procedural terms and
of
Durch die erfindungsgemäße Ausgestaltung mit wenigen einzelnen Bauteilen läßt sich ein besonders einfaches, zugleich aber sehr kompaktes und damit einhergehend gegenüber Störungen wenig empfindliches sowie kostengünstiges Verfahren zur optischen Darstellung von Informationen mit mehreren Projektionsmodulen auf einer transparenten Projektionsfläche in Durchlichtprojektion erhalten. Gleichzeitig läßt sich durch die erfindungsgemäße Ausgestaltung nicht zuletzt aufgrund der nur wenigen einzelnen Bauteile eine in ihrer Bauweise besonders einfache, zugleich kompakte Anordnung zur optischen Darstellung von Informationen auf einer transparenten Projektionsfläche in Durchlichtprojektion mit mehreren Projektionsmodulen erreichen. Infolge der nur wenigen einzelnen Bauteile eines jeden Projektionsmodules ist zugleich die Störanfälligkeit der Anordnung insgesamt sehr reduziert, wenn nicht sogar ausgeschlossen. Die erfindungsgemäße Anordnung besitzt folglich auch eine hohe Lebensdauer. Insofern stellt die Anordnung nach der Erfindung eine sehr kostengünstige Anordnung zur optischen Darstellung von Informationen mit mehreren Projektionsmodulen im Hinblick auf deren Herstellung, Wartung und Reparatur dar. Dies umso mehr, als in aller Regel eine Vielzahl von Projektionsmodulen benötigt wird, um auch eine großflächige Darstellung von Informationen zu ermöglichen. Due to the configuration according to the invention with a few individual Components can be a particularly simple, but at the same time very compact and therefore less sensitive to interference as well as cost-effective method for optical representation of information with multiple projection modules a transparent projection surface in transmitted light projection receive. At the same time, the inventive configuration not least because of the few individual components a construction that is particularly simple, yet compact Arrangement for the optical display of information a transparent projection surface in transmitted light projection achieve with multiple projection modules. As a result of the few individual components of each projection module at the same time, the arrangement as a whole is very susceptible to faults reduced, if not excluded. The invention The arrangement therefore also has a long service life. To that extent represents the arrangement according to the invention a very inexpensive Arrangement for the optical representation of information with several Projection modules with regard to their manufacture, maintenance and repair. This is all the more so as a rule Variety of projection modules is required to include one enable large-scale display of information.
Durch die Ausnutzung des Vergrößerungseffektes einer Schattenprojektion im divergenten Strahlengang einer Lichtquelle wird erreicht, daß die reellen Bildteile, die pro Projektionsmodul auf einer Projektionsfläche entstehen, derart aneinandergefügt werden, daß ein lückenloses Gesamtbild auf der Projektionsfläche entsteht. Der Abstand zwischen einem Lichtventil, beispielsweise einer Flüssigkristallzelle, und der Pojektionsfläche, der Projektionsabstand, wird in Abhängigkeit vom vorhandenen, optisch nicht nutzbaren umlaufenden Rand der Flüssigkristallzelle, vom Öffnungswinkel der Lichtquelle, beispielsweise eines Lichtwellenleiters, und von der gewünschten Vergrößerung so gewählt, daß die um ca. 10% vergrößerten Schattenbilder aus den Flüssigkristallzellen so aneinandergefügt werden, daß die nicht angesteuerten Randflächen der Flüssigkristallzellen ausgeblendet und die angesteuerten Flächen der Flüssigkristallzellen auf der Projektionsfläche lückenlos aneinandergereiht werden. Da die benötigte Vergrößerung in der Regel kleiner als 10% ist, kann auf weitere optische Hilfsmittel verzichtet werden. Eine geringfügige Unschärfe der Abbildung ist für die Betrachtung aus Entfernungen, wie sie für Großprojektionen üblich sind, bedeutungslos. Es wird ein kompaktes und kostengünstiges Projektionssystem für die großflächige Informationsdarstellung auf der Basis von Flüssigkristallzellen erzielt, mit dem auf einer streuenden Projektionsfläche ein homogenes reelles Bild erzeugt werden kann, bei dem die Modulbegrenzungen nicht sichtbar sind.By taking advantage of the magnification effect of a shadow projection in the divergent beam path of a light source achieved that the real image parts per projection module created on a projection surface, joined together in this way be that a complete picture on the projection surface arises. The distance between a light valve, for example a liquid crystal cell, and the projection surface, the projection distance depends on the existing, optically unusable peripheral edge of the Liquid crystal cell, from the opening angle of the light source, for example an optical fiber, and of the desired magnification selected so that the approx. 10% enlarged shadow images from the liquid crystal cells be joined together that the uncontrolled edge surfaces the liquid crystal cells are hidden and the controlled surfaces of the liquid crystal cells on the projection surface to be strung together without gaps. Since the required magnification is usually less than 10% no further optical aids are required. A slight blur of the image is for viewing from distances that are common for large projections, meaningless. It will be compact and inexpensive Projection system for large-scale information display achieved on the basis of liquid crystal cells with which a scattering projection surface a homogeneous real image can be generated in which the module limits are not are visible.
Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention result itself from the subclaims.
Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles einer Anordnung zur optischen Darstellung von Informationen näher erläutert. Es zeigen:
- Fig. 1
- die schematische perspektivische Ansicht eines Projektionsmoduls,
- Fig. 2
- die schematische Seitenansicht zweier benachbarter Projektionsmodule und
- Fig. 3
- die schematische Seitenansicht einer Anordnung mit mehreren Projektionsmodulen.
- Fig. 1
- the schematic perspective view of a projection module,
- Fig. 2
- the schematic side view of two adjacent projection modules and
- Fig. 3
- the schematic side view of an arrangement with several projection modules.
Die Fig. 1 zeigt zur Verdeutlichung des Prinzips der Bildaufweitung
mittels Projektionstechnik die perspektivische
Ansicht eines Projektionsmodules 1. Das Projektionsmodul 1
besteht aus einer Lichtquelle 2 mit definierter Abstrahlcharakteristik
2α zur Hinterleuchtung der darzustellenden Information.
Im vorliegenden Beispiel besteht die Lichtquelle 2
aus einem Lichtleiterbündel 11 mit einer Abstrahlcharakteristik
2α von ca. 60°. Als Abstrahlcharakteristik 2 α wird
der effektive Öffnungswinkel eines Lichtleiters bezeichnet.
Der effektive Öffnungswinkel eines Lichtleiters ergibt sich
aus der Halbwertsbreite der gemessenen winkelabhängigen
Strahlungsverteilung am Lichtleiterausgang, wenn der Lichtleitereingang
mit einem Lambert'schen Strahler beleuchtet wird.
Die Lichtquelle 2 durchstrahlt eine Flüssigkristallzelle 3,
welche einen umlaufenden Kontaktierungsrand 12 aufweist. Die
Flüssigkristallzelle 3 wirkt als Lichtventil und enthält die
darzustellende Information. Die streuende Projektionsfläche 4
bildet die Betrachtungsebene, auf ihr wird die Information in
vergrößertem Maßstab abgebildet. Der Projektionsabstand d
zwischen der Projektionsfläche 4 und der Flüssigkeitszelle 3
hängt von dem gewünschten Vergrößerungsfaktor ab.1 shows the principle of image expansion to clarify
the perspective using projection technology
View of a projection module 1. The projection module 1
consists of a
In der Fig. 2 werden anhand von zwei benachbarten Projektionsmodulen
1 die Zusammenhänge aufgezeigt, die beachtet werden
müssen, um mittels mehrerer Projektionsmodule 1 ein lückenloses
Gesamtbild einer darzustellenen Information zu bekommen.
Die Lichtquellen 2 durchstrahlen jeweils mit einem Öffnungswinkel
von ca. 60° jeweils eine Flüssigkristallzelle 3, die
jeweils eine Höhe H2 aufweisen und welche Teile der darzustellenden
Information enthalten. Wenn eine ca. 10%ige
Vergrößerung des Bidlteiles 6 auf der Projektionsfläche 4
erzielt werden soll und wenn beide Bildteile 6 jeder Flüssigkristallzelle
3 lückenlos aneinandergefügt sein sollen, dann
muß der Abstand d zwischen den Flüssigkristallzellen 3 und der
Projektionsfläche 4 mit der jeweiligen Höhe H1 nach folgender
Beziehung gewählt werden:
Das Verfahren nutzt den Vergrößerungseffekt einer Schattenprojektion
im divergenten Strahlengang einer Lichtquelle aus.
Die für jedes Einzelmodul 1 eingesetzte Lichtquelle 2 muß
diese Bedingung erfüllen, d.h. es können neben den angeführten
Ausgängen von Lichtleitern auch Halogenpunktstrahler mit
definierter Abstrahlcharakteristik verwendet werden. Die
zwischen der Lichtquelle 2 und dem Betrachter 15 angeordnete
Projektionsfläche 4 muß eine streuende Fläche , z.B. eine
Mattscheibe sein. Die Streucharakteristik kann durch die
Verwendung von dünnen, weiß eingefärbten Gläsern oder durch
Folien (Opaleffekt) wesentlich verbessert werden. Man kann
diesen Effekt auch durch die Kombination einer Streufläche mit
einer Fresnel'schen Stufenlinse erreichen. Um die
Strahlengänge benachbarter Module 1 zu entkoppeln ist es
günstig, jeweils eine Blende 5 in der Ebene des
Ansteuerelementes, hier der Flüssigkristallzellen 3,
anzuordnen. In der Fig.3 wird die Blende 5 durch die innere
Schräge des Gehäuses 8 gebildet. Da die benötigte Vergrößerung
in der Regel unter 10% liegt, kann auf weitere optische
Hilfsmittel verzichtet werden. Eine geringfügige Unschärfe der
Abbildung ist für die Betrachtung aus Entfernungen, wie sie
für Großprojektionen üblich sind, bedeutungslos.The method uses the magnification effect of a shadow projection
in the divergent beam path of a light source.
The
In der Fig. 3 ist eine Anordnung mit vier Projektionsmodulen 1
dargestellt, wie sie für eine großflächige Darstellung von
Informationen benötigt wird. Jedes Projektionsmodul 1 wird aus
einer zentralen Lichtquelleneinheit 9 über flexible Lichtleiter
13, welche in polierten Endstücken 14 münden und die
Lichtquelle 2 bilden, mit Licht gespeist. Das Licht tritt aus
diesen Endstücken 14 in einem definierten Winkel 2α aus und
durchstrahlt die jeweiligen Lichtventile, hier Flüssigkristallzellen
3 so, daß auf der Projektionsfläche 4, welche
im definierten Abstand d von den Lichtventilen angeordnet ist,
aus den Teilprojektionen der Bildteile 6 für den Betrachter 15
ein homogenes Gesamtbild 7 entsteht. Die einzelnen Projektionsmodule
1 sind in einem Gehäuse 8 zusammengefaßt. Die Ansteuerung
der Lichtventile, hier der Flüssigkristallzellen 3,
erfolgt über eine Steuerelektronik 10. 3 shows an arrangement with four projection modules 1
shown as for a large display of
Information is needed. Each projection module 1 is made
a central
- 11
- ProjektionsmodulProjection module
- 22nd
- LichtquelleLight source
- 33rd
- Lichtventil (Flüssigkristallzelle)Light valve (liquid crystal cell)
- 44th
- ProjektionsflächeProjection surface
- 55
- Blendecover
- 66
- BildteilPart of the picture
- 77
- GesamtbildOverall picture
- 88th
- Gehäusecasing
- 99
- LichtquelleneinheitLight source unit
- 1010th
- SteuerelektronikControl electronics
- 1111
- LichtleiterbündelOptical fiber bundle
- 1212th
- KontaktierungsrandContact edge
- 1313
- LichtleiterLight guide
- 1414
- EndstückTail
- 1515
- BetrachterViewer
- dd
- ProjektionsabstandProjection distance
- 2α2α
- Abstrahlcharakteristik/ÖffnungswinkelBeam pattern / opening angle
- H1H1
- Höhe des vergrößerten BildteilesHeight of the enlarged part of the picture
- H2H2
- Höhe des zu vergrößernden BildteilesHeight of the part of the image to be enlarged
Claims (13)
- A process for optically displaying information on a transparent projected area (4) in rear projection with several projection modules (1), wherein a shadow projection of a part (6) of a picture is produced on the projected area (4) by means of each projection module (1) in that light from a light source (2) having a defined radiation characteristic (2a) directly is projected through a controllable light valve (3) in form of a liquid crystal cell with one of the information to be displayed, onto the projected area (4) arranged behind and wherein the shadow projections of the parts (6) of the picture are combined with each other continuously on the projected area (4) to a real overall picture (7).
- The process of claim 1, characterized in that the projecting distance (d) between the controllable light valve (3) and the projected area (4) is selected in dependence of the optically useful light valve (3), the radiation characteristic (2a) and the desired magnification.
- The process of claim 2, characterized in that the projecting distance (d) between the controllable light valve (3) and the respective projecting area (6) is selected according to the following relationship:
- The process of any of claims 1 to 3, characterized in that the respective parts (6) of a picture are magnified by up to 10 % by their respective shadow projection on the projected area (4).
- A device for optically displaying information on a transparent projected area (4) in rear projection with several projection modules (1), particularly for conducting the process of any of the preceding claims, wherein a shadow projection of a part (6) of a picture on the projected area (4) is producible by each projection module (1), and wherein the shadow projections of the parts (6) of a picture can be combined to a real overall picture (7) on the projected area (4), characterized in that each projection module (1) comprises a light source (2) having a defined radiation characteristic (2a) and a controllable light valve (3) in the form of a liquid crystal cell with one of the information to be displayed, through which the light from the light source (2) directly can be projected onto the projected area (4) arranged behind, wherein the projecting distance (d) between the controllable light valve (3) and the projected area (4) is selected such that the parts (6) of a picture projected onto the projected areas (4) of adjacent projection modules (1) are continuously adjoined.
- The device of claim 5, characterized in that the light source (2) is the output of an optical waveguide (13).
- The device of claim 5, characterized in that the light source (2) is halogen spot projector.
- The device of any of claims 5 to 7, characterized in that the controllable light valve (3) in form of liquid crystal cell is controllable by means of a control electronics (10).
- The device of any of claims 5 to 8, characterized in that the projected area (4) is a scattering area.
- The device of claim 9, characterized in that the scattering area is formed of a foil or consists of opal glass.
- The device of any of claims 5 to 10, characterized in that the projected area (4) consists of a sandwich combination of scattering areas and Fresnel lenses.
- The device of any of claims 5 to 11, characterized in that between the light source (2) and the light valve (3) a screen (5) is arranged in the plane of the light valve (3).
- The device of any of claims 5 to 12, characterized in that the projection modules (1) are arranged in lines and columns.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4244448A DE4244448C2 (en) | 1992-12-23 | 1992-12-23 | Method and arrangement for the optical representation of information |
| DE4244448 | 1992-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0603465A1 EP0603465A1 (en) | 1994-06-29 |
| EP0603465B1 true EP0603465B1 (en) | 1999-04-21 |
Family
ID=6476769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93114019A Expired - Lifetime EP0603465B1 (en) | 1992-12-23 | 1993-09-02 | Method and device for optical presentation of information |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5664353A (en) |
| EP (1) | EP0603465B1 (en) |
| AT (1) | ATE179272T1 (en) |
| AU (1) | AU671140B2 (en) |
| DE (2) | DE4244448C2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159985A (en) * | 1995-12-08 | 1997-06-20 | Mitsubishi Electric Corp | Image display system |
| DE19654440A1 (en) * | 1996-12-30 | 1998-07-02 | Mediatec Ges Fuer Multimediale | Device and method for the large-scale display of information by means of liquid crystal displays |
| JPH10301202A (en) * | 1997-02-28 | 1998-11-13 | R D S Kk | Multiprojection system |
| US6247815B1 (en) * | 1997-06-16 | 2001-06-19 | Metavision Corporation | Work desk with panoramic display |
| US5902030A (en) * | 1998-05-29 | 1999-05-11 | Blanchard; Randall D. | System for displaying images from multiple projectors onto a common screen |
| KR100629757B1 (en) * | 2005-04-19 | 2006-09-29 | 심기섭 | Advertising device using optical image |
| US7334901B2 (en) * | 2005-04-22 | 2008-02-26 | Ostendo Technologies, Inc. | Low profile, large screen display using a rear projection array system |
| US9902644B2 (en) | 2014-06-19 | 2018-02-27 | Corning Incorporated | Aluminosilicate glasses |
| CN108074509B (en) * | 2018-01-25 | 2020-08-14 | 台州市皓仔邦工业设计有限公司 | Directional rotation polarized light reflection advertisement improvement device and control method thereof |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE509684A (en) * | ||||
| US1065845A (en) * | 1910-10-24 | 1913-06-24 | Fernand Sauvage | Optical indicating apparatus. |
| US3020798A (en) * | 1957-09-17 | 1962-02-13 | Charles M Chrisman | Projection advertising |
| US3198066A (en) * | 1962-03-01 | 1965-08-03 | Clarence L Mcghee | Outdoor advertising device including projection means |
| US3796484A (en) * | 1971-08-20 | 1974-03-12 | Holograph Corp | Optical communication system providing selective image presentations |
| US4116553A (en) * | 1977-01-21 | 1978-09-26 | Cohen Norman E | Display method and apparatus |
| US4257041A (en) * | 1978-06-19 | 1981-03-17 | Izon Corporation | Electro optical display device |
| IL55032A (en) * | 1978-06-29 | 1984-05-31 | Stolov Michael | Color picture display system including electronically controlled slides |
| DE2924101A1 (en) * | 1978-06-29 | 1980-01-10 | Michael Stolov | MULTICOLOR IMAGE PROJECTION SYSTEM |
| JPS5664315A (en) * | 1979-10-29 | 1981-06-01 | Sharp Corp | Production of liquid crystal display panel |
| FR2471012A1 (en) * | 1979-12-07 | 1981-06-12 | Commissariat Energie Atomique | LIGHTING DEVICE FOR LARGE SCREEN |
| DE8124380U1 (en) * | 1981-08-20 | 1983-03-24 | Siemens AG, 1000 Berlin und 8000 München | INTERCHANGEABLE DISPLAY DEVICE, IN PARTICULAR FOR TRAFFIC SIGNAL INDICATORS |
| JPS60203915A (en) * | 1984-03-28 | 1985-10-15 | Matsushita Electric Ind Co Ltd | Large-sized liquid crystal display device |
| FR2607301B1 (en) * | 1986-11-25 | 1990-11-30 | Matra | MODULAR LIQUID CRYSTAL DISPLAY DEVICE |
| FR2633425B1 (en) * | 1988-06-28 | 1990-09-21 | Morin Francois | GIANT LIQUID CRYSTAL DISPLAY DEVICE |
| US4954935A (en) * | 1989-02-08 | 1990-09-04 | Holophane Company, Inc. | Lighting system for illuminating billboards and the like |
| JP2898673B2 (en) * | 1989-05-10 | 1999-06-02 | 株式会社日立製作所 | Multi-screen projector and projector device |
| JPH0317615A (en) * | 1989-06-14 | 1991-01-25 | Seiko Instr Inc | Overhead projector for ordinary paper |
| JPH0385879A (en) * | 1989-08-29 | 1991-04-11 | Seiko Epson Corp | Projection type display device |
| DE4004739A1 (en) * | 1990-02-15 | 1991-08-22 | Holtronic Gmbh | Optical system for stereoscopic information display - uses left and right hand light sources activated in alternation for illuminating display |
| JP3017615U (en) | 1995-05-01 | 1995-10-31 | 株式会社ホクブ | Planting method frame |
-
1992
- 1992-12-23 DE DE4244448A patent/DE4244448C2/en not_active Expired - Fee Related
-
1993
- 1993-09-02 EP EP93114019A patent/EP0603465B1/en not_active Expired - Lifetime
- 1993-09-02 AT AT93114019T patent/ATE179272T1/en not_active IP Right Cessation
- 1993-09-02 DE DE59309529T patent/DE59309529D1/en not_active Expired - Fee Related
- 1993-09-10 AU AU46246/93A patent/AU671140B2/en not_active Ceased
- 1993-11-17 US US08/153,631 patent/US5664353A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AU4624693A (en) | 1994-07-07 |
| DE4244448A1 (en) | 1994-07-07 |
| AU671140B2 (en) | 1996-08-15 |
| ATE179272T1 (en) | 1999-05-15 |
| US5664353A (en) | 1997-09-09 |
| DE4244448C2 (en) | 1995-04-13 |
| EP0603465A1 (en) | 1994-06-29 |
| DE59309529D1 (en) | 1999-05-27 |
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