EP0224394B1 - Projector with a spherical screen, in particular for advertising purposes - Google Patents

Projector with a spherical screen, in particular for advertising purposes Download PDF

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Publication number
EP0224394B1
EP0224394B1 EP86402208A EP86402208A EP0224394B1 EP 0224394 B1 EP0224394 B1 EP 0224394B1 EP 86402208 A EP86402208 A EP 86402208A EP 86402208 A EP86402208 A EP 86402208A EP 0224394 B1 EP0224394 B1 EP 0224394B1
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EP
European Patent Office
Prior art keywords
motor
screen
sphere
projector
filter
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EP86402208A
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German (de)
French (fr)
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EP0224394A1 (en
Inventor
Pierre Nicolas
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Individual
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Individual
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Priority to AT86402208T priority Critical patent/ATE51099T1/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/34—Illuminated signs; Luminous advertising with light sources co-operating with movable members, e.g. with shutters to cover or uncover the light source
    • G09F13/36—Illuminated signs; Luminous advertising with light sources co-operating with movable members, e.g. with shutters to cover or uncover the light source co-operating with rotating screening means
    • 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 present invention overcomes these drawbacks by creating a projection apparatus with a fixed spherical screen, the front face of which is substantially the size of the hemisphere forming a screen, the rear part being opaque except in the central zone to allow projection of the image arriving from the perspective of a projector placed behind the screen sphere.
  • This assembly is mounted on a suitably supported plate.
  • a plate supporting a rotating filter placed in front of the projector optics In front of the projector is mounted a plate supporting a rotating filter placed in front of the projector optics.
  • This rotating filter cooperates with a movable shutter making it possible to partially or completely shut off the projector optics in order to obtain images developing on the screen sphere. either vertically or horizontally with each complete rotation of the screen.
  • means are provided allowing the rotation, on the one hand, of the filter and, on the other hand, of the screen, these means being supplied through organs allowing the image to stop, the disappearance total of the image and also by means of microprocessors, the variation of the speed of rotation of the polarization of the image (filter) and, this, according to the projected slide. It is thus also possible to vary the exposure time of each slide on the same bubble screen or in the form of slides of several programs one after the other by creating an operating synchronization of several projection apparatuses between them.
  • the projection apparatus with a spherical screen more especially for advertising uses in which the sphere forming a screen is constituted by a transparent or translucent front half-sphere and by an opaque rear half-sphere except in the central zone to allow the projection of images arriving from the optics of a projector located behind the screen, this assembly being mounted on a tablet support, is characterized in that the front face of the image projector comprises, in front of the optical projector, a plate containing a rotary filter driven in rotation by a motor, this filter can be obscured by a rotary screen describing an imaginary circle of the fact that it is mounted on axes integral with discs rotating in synchronism under the action of a motor, the disks aligned vertically and placed in the same vertical plane being mounted one on the motor shaft fixed to the back of the plate, the other on a n axis integral with the plate, this assembly being subjected for the power supply of the screen motor to microswitches making it possible to stop the rotary screen in selected positions
  • At least two microprocessors allow one to vary the speed of rotation of the motor driving the filter in order to vary the speed of rotation of the polarization as a function of the slide considered, l Another is the speed of rotation of the motor in order to vary the exposure time of each slide and also to ensure, with the help of several image projectors, several programs which are thus synchronized.
  • a support 1 for example a vertical foot
  • a shelf 3 on the front part of which is mounted an axis 4 carrying a spherical screen 5, the half of which - front sphere 6 is transparent or translucent and the rear half-sphere 7 is opaque except in the central central area 8 where it is transparent to allow the passage of light rays RL projecting the image on the front part 6 of the spherical screen 5.
  • the rear part of the tablet 3 carries a foot 9 on which is fixed the image projector 10 having on its front face 10a an optic 11.
  • Spacers 14 fixed to the four corners of the front face 10a of the image projector 10 carry a plate 15 of rectangular shape having a hole 16 placed in front of the optics 11 of the image projector 10 and in the hole 16 is mounted a filter 17.
  • a needle bearing 18 is interposed between the periphery of the filter 17 and the edge of the hole 16 so as to allow easy rotation of the filter 17, rotation obtained by means of a belt 19 driven by the driving pulley 20 of a motor 21, the belt passing over a pulley 22 surrounding the filter 17 in front of the needle bearing 18.
  • the motor 21 is fixed by any suitable means to the rear surface of the plate 15 (see fig. 3).
  • a second motor 30 fixed to the rear wall of the plate 15 drives by its motor shaft 31, a disc 32 having on its periphery a groove 34 in which passes a belt 35 driving in rotation a second disc 36 mounted idly on an axis 37 secured to the plate 15.
  • the discs 32 and 36 are therefore located on the front face of the plate 15 (see fig. 4) and can therefore rotate easily by driving a rotary screen 40 mounted on axes 41, 42 integral with the one of the upper disc 32 and the other of the lower disc 36, discs placed on the same vertical axis and in the same vertical plane.
  • the rotary screen 40 comes during a complete revolution of the discs 32, 36 to traverse an imaginary circle making it possible to close the filter 17 vertically and horizontally, therefore to make the image projected on the spherical screen appear and disappear vertically and horizontally. 5.
  • Micro-switches 50, 51 cooperating with stops 52, 53 integral with the discs 32, 36 ensure a delay of the image, that is to say that the projection of the image stops after having appeared vertically and then horizontally.
  • This time delay mounted on the power supply circuit of the motor 30 also allows at a certain moment to completely obscure the image during the time when the projector 10 changes the slide by rotating the image store by a fraction of a turn corresponding to the number of slides in the projector magazine.
  • the power supply circuit of the motor 21 may include a microprocessor shown schematically at 21 a, placed in the power supply circuit of this motor 21 driving in rotation the filter 17 to adjust the speed of rotation of the polarization according to the projected diaspositive. It is also possible to include, in the power supply circuit of the motor 30 driving in rotation via the disks 32, 36, the screen 40, another microprocessor represented schematically at 30a in order to modify the exposure time of each slide.
  • the microprocessor 30a can have in its memory several slide programs so as to allow synchronization of several projection devices (image projector 10) with one another, but in this case, these image projectors are mobile, for example on a carriage sliding relative to the foot 9, to bring each image projector into the exact projection position.
  • the screen projection apparatus has the usual settings for obtaining a perfect image on the spherical screen 5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Displays For Variable Information Using Movable Means (AREA)

Abstract

A screen-forming sphere is made of a front translucent half-sphere and of a rear half-sphere which is opaque except in a central region. An image projector is situated behind the screen and has a front face comprising a platen mounted in front of the optic of the image projector. The platen contains a rotary polarization filter rotated by a first motor. The filter is occultable by a rotary flap mounted on spindles rigidly connected to two rotary vertically aligned disc members which rotate in synchronism under action of a second motor.

Description

On connaît déjà des écrans récepteurs d'images optiques pour usages publicitaires, qui sont constitués par des surfaces fixes ou mobiles placées à l'intérieur de volumes cylindriques ou sphériques (voir en particulier le FR - A- 2 116 789).There are already known screens for receiving optical images for advertising purposes, which consist of fixed or mobile surfaces placed inside cylindrical or spherical volumes (see in particular FR-A-2 116 789).

Il existe également des écrans placés suivant un plan diamétral à l'intérieur d'une sphère. Ces écrans translucides et de forme circulaire tournent sur eux-mêmes et reçoivent, depuis un projecteur, une image qui, du fait que les écrans tournent, part d'une grandeur déterminée, se développe, puis se rétrécit et disparaît (voir FR - A - 2 266 249).There are also screens placed along a diametrical plane inside a sphere. These translucent and circular screens rotate on themselves and receive, from a projector, an image which, due to the fact that the screens rotate, starts from a determined size, develops, then shrinks and disappears (see FR - A - 2,266,249).

On connaît également un écran tournant du type décrit en dernier, mais dont le volume sphérique présente une demisphère avant transparente ou translucide et une demisphère arrière opaque sauf dans l'axe central pour permettre aux rayons lumineux donnant l'image de pénétrer dans la sphère jusqu'à l'écran tournant (voir FR - A - 2 448 734).There is also known a rotating screen of the type described last, but whose spherical volume has a transparent or translucent front hemisphere and an opaque rear hemisphere except in the central axis to allow the light rays giving the image to penetrate the sphere up to 'on the rotating screen (see FR - A - 2 448 734).

Tous ces appareils présentent des inconvénients, car l'image visible est plus ou moins bien perçue par les spectateurs. En effet, dans les enceintes éclairées à la lumière artificielle ou du jour, l'image est plus ou moins visible et, de plus, lorsque l'écran tourne cette image est déformée donnant parfois de bons résultats mais aussi parfois des résultats peu satisfaisants. De plus, l'écran tournant nécessite l'installation d'un groupe moteur assez fragile augmentant ainsi le prix de l'ensemble.All these devices have drawbacks, because the visible image is more or less well perceived by the spectators. Indeed, in the speakers lit with artificial or daylight, the image is more or less visible and, moreover, when the screen turns this image is distorted sometimes giving good results but also sometimes unsatisfactory results. In addition, the rotating screen requires the installation of a fairly fragile motor group thus increasing the price of the assembly.

La présente invention remédie à ces inconvénients en créant un appareil de projection à écran sphérique fixe dont la face avant est sensiblement de la grandeur de la demi-sphère formant écran, la partie arrière étant opacifiée sauf dans la zone centrale pour permettre la projection de l'image parvenant depuis l'optique d'un projecteur placé derrière la sphère-écran. Cet ensemble est monté sur un plateau supporté convenablement. Devant le projecteur est montée une platine supportant un filtre tournant disposé devant l'optique du projecteur. Ce filtre tournant coopère avec un volet mobile permettant d'obturer partiellement ou complètement l'optique du projecteur afin d'obtenir des images se développant sur la sphère-écran. soit verticalement, soit horizontalement à chaque rotation complète de l'écran.The present invention overcomes these drawbacks by creating a projection apparatus with a fixed spherical screen, the front face of which is substantially the size of the hemisphere forming a screen, the rear part being opaque except in the central zone to allow projection of the image arriving from the perspective of a projector placed behind the screen sphere. This assembly is mounted on a suitably supported plate. In front of the projector is mounted a plate supporting a rotating filter placed in front of the projector optics. This rotating filter cooperates with a movable shutter making it possible to partially or completely shut off the projector optics in order to obtain images developing on the screen sphere. either vertically or horizontally with each complete rotation of the screen.

De plus, il est prévu des moyens permettant la rotation, d'une part, du filtre et, d'autre part, de l'écran, ces moyens étant alimentés à travers des organes permettant l'arrêt de l'image, la disparition totale de l'image et également au moyen de micro-processeurs, la variation de la vitesse de rotation de la polarisation de l'image (filtre) et, ce, en fonction de la diapositive projetée. On peut ainsi également faire varier le temps d'exposition de chaque diapositive sur le même écran-bulle ou en aiteman- ce des diapositives de plusieurs programmes les uns après les autres en créant une synchronisation de fonctionnement de plusieurs appareils de projection entre eux.In addition, means are provided allowing the rotation, on the one hand, of the filter and, on the other hand, of the screen, these means being supplied through organs allowing the image to stop, the disappearance total of the image and also by means of microprocessors, the variation of the speed of rotation of the polarization of the image (filter) and, this, according to the projected slide. It is thus also possible to vary the exposure time of each slide on the same bubble screen or in the form of slides of several programs one after the other by creating an operating synchronization of several projection apparatuses between them.

Conformément à l'invention, l'appareil de projection à écran sphérique plus spécialement pour usages publicitaires, dans lequel la sphère formant écran est constituée par une demi-sphère avant transparente ou translucide et par une demi-sphère arrière opaque sauf dans la zone centrale pour permettre la projection d'images parvenant depuis l'optique d'un projecteur situé derrière l'écran, cet ensemble étant monté sur un supporte-tablette, est caractérisé en ce que la face avant du projecteur d'images comporte, devant l'optique du projecteur, une platine contenant un filtre rotatif entraîné en rotation par un moteur, ce filtre pouvant être occulté par un écran rotatif décrivant un cercle imaginaire du fait qu'il est monté sur des axes solidaires de disques tournant en synchronisme sous l'action d'un moteur, les disques alignés verticalement et placés dans un même plan vertical étant montés l'un sur l'arbre du moteur fixé au dos de la platine, l'autre sur un axe solidaire de la platine, cet ensemble étant soumis pour l'alimentation du moteur de l'écran à des micro-interrupteurs permettant d'arrêter l'écran rotatif dans des positions choisies.In accordance with the invention, the projection apparatus with a spherical screen more especially for advertising uses, in which the sphere forming a screen is constituted by a transparent or translucent front half-sphere and by an opaque rear half-sphere except in the central zone to allow the projection of images arriving from the optics of a projector located behind the screen, this assembly being mounted on a tablet support, is characterized in that the front face of the image projector comprises, in front of the optical projector, a plate containing a rotary filter driven in rotation by a motor, this filter can be obscured by a rotary screen describing an imaginary circle of the fact that it is mounted on axes integral with discs rotating in synchronism under the action of a motor, the disks aligned vertically and placed in the same vertical plane being mounted one on the motor shaft fixed to the back of the plate, the other on a n axis integral with the plate, this assembly being subjected for the power supply of the screen motor to microswitches making it possible to stop the rotary screen in selected positions.

Suivant une autre caractéristique de l'invention, au moins deux micro-processeurs permettent l'un la variation de la vitesse de rotation du moteur entraînant le filtre afin de faire varier la vitesse de rotation de la polarisation en fonction de la diapositive considérée, l'autre la vitesse de rotation du moteur afin de faire varier ie temps d'exposition de chaque diapositive et d'assurer également avec l'aide de plusieurs projecteurs d'images plusieurs programmes qui sont ainsi synchronisés.According to another characteristic of the invention, at least two microprocessors allow one to vary the speed of rotation of the motor driving the filter in order to vary the speed of rotation of the polarization as a function of the slide considered, l Another is the speed of rotation of the motor in order to vary the exposure time of each slide and also to ensure, with the help of several image projectors, several programs which are thus synchronized.

Diverses autres caracteréristiques de l'invention ressortent d'ailleurs de la description qui suit.Various other characteristics of the invention will also emerge from the description which follows.

Une forme de réalisation de l'objet de l'invention est représentée, à titre d'exemple non limitatif, au dessin annexé.

  • La fig. 1 est une élévation latérale schématique d'un appareil de projection conforme à l'invention.
  • La fig. 2 est une vue à grande échelle de la partie arrière suivant la ligne II-II de la fig. 1 de la platine portant le filtre et l'écran rotatif.
  • La fig. 3 est une vue de face de la platine portant le filtre et l'écran rotatif.
  • La fig. 4 est une élévation latérale correspondant aux fig. 2 et 3.
An embodiment of the object of the invention is shown, by way of nonlimiting example, in the accompanying drawing.
  • Fig. 1 is a schematic side elevation of a projection apparatus according to the invention.
  • Fig. 2 is a large-scale view of the rear part along the line II-II of FIG. 1 of the plate carrying the filter and the rotary screen.
  • Fig. 3 is a front view of the plate carrying the filter and the rotary screen.
  • Fig. 4 is a side elevation corresponding to FIGS. 2 and 3.

A la fig. 1, on a représenté un support 1 (par exemple un pied vertical) qui maintient, à sa partie supérieure par un plateau 2, une tablette 3 sur la partie avant de laquelle est monté un axe 4 portant un écran sphérique 5 dont la demi - sphère avant 6 est transparente ou translucide et dont la demi-sphère arrière 7 est opacifiée sauf dans la zone centrale médiane 8 où elle est transparente pour permettre le passage de rayons lumineux RL projetant l'image sur la partie avant 6 de l'écran sphérique 5.In fig. 1, there is shown a support 1 (for example a vertical foot) which maintains, at its upper part by a plate 2, a shelf 3 on the front part of which is mounted an axis 4 carrying a spherical screen 5, the half of which - front sphere 6 is transparent or translucent and the rear half-sphere 7 is opaque except in the central central area 8 where it is transparent to allow the passage of light rays RL projecting the image on the front part 6 of the spherical screen 5.

La partie arrière de la tablette 3 porte un pied 9 sur lequel est fixé le projecteur d'images 10 comportant à sa face avant 10a une optique 11. Des entretoises 14 fixées aux quatre angles de la face avant 10a du projecteur d'images 10 portent une platine 15 de forme rectangulaire présentant un trou 16 placé devant l'optique 11 du projecteur d'images 10 et dans le trou 16 est monté un filtre 17. Un roulement à aiguilles 18 est interposé entre la périphérie du filtre 17 et le bord du trou 16 de façon à permettre une rotation aisée du filtre 17, rotation obtenue à l'aide d'une courroie 19 entraînée par la poulie motrice 20 d'un moteur 21, la courroie passant sur une poulie 22 entourant le filtre 17 devant le roulement à aiguilles 18. Le moteur 21 est fixé par tous moyens convenables à la surface arrière de la platine 15 (voir fig. 3).The rear part of the tablet 3 carries a foot 9 on which is fixed the image projector 10 having on its front face 10a an optic 11. Spacers 14 fixed to the four corners of the front face 10a of the image projector 10 carry a plate 15 of rectangular shape having a hole 16 placed in front of the optics 11 of the image projector 10 and in the hole 16 is mounted a filter 17. A needle bearing 18 is interposed between the periphery of the filter 17 and the edge of the hole 16 so as to allow easy rotation of the filter 17, rotation obtained by means of a belt 19 driven by the driving pulley 20 of a motor 21, the belt passing over a pulley 22 surrounding the filter 17 in front of the needle bearing 18. The motor 21 is fixed by any suitable means to the rear surface of the plate 15 (see fig. 3).

Comme on peut s'en rendre compte à la fig. 3, un deuxième moteur 30 fixé sur la paroi arrière de la platine 15 entraîne par son arbre moteur 31, un disque 32 présentant sur sa périphérie une gorge 34 dans laquelle passe une courroie 35 entraînant en rotation un deuxième disque 36 monté fou sur un axe 37 solidaire de la platine 15. Les disques 32 et 36 se trouvent donc sur la face avant de la platine 15 (voir fig. 4) et peuvent donc tourner aisément en entraînant un écran rotatif 40 monté sur des axes 41, 42 solidaires l'un du disque supérieur 32 et l'autre du disque inférieur 36, disques placés sur un même axe vertical et dans le même plan vertical.As can be seen in fig. 3, a second motor 30 fixed to the rear wall of the plate 15 drives by its motor shaft 31, a disc 32 having on its periphery a groove 34 in which passes a belt 35 driving in rotation a second disc 36 mounted idly on an axis 37 secured to the plate 15. The discs 32 and 36 are therefore located on the front face of the plate 15 (see fig. 4) and can therefore rotate easily by driving a rotary screen 40 mounted on axes 41, 42 integral with the one of the upper disc 32 and the other of the lower disc 36, discs placed on the same vertical axis and in the same vertical plane.

Ainsi, l'écran rotatif 40 vient pendant un tour complet des disques 32, 36 parcourir un cercle imaginaire permettant d'obturer verticalement et horizontalement le filtre 17, donc de faire apparaître et disparaître verticalement et horizontalement l'image projetée sur l'écran sphérique 5.Thus, the rotary screen 40 comes during a complete revolution of the discs 32, 36 to traverse an imaginary circle making it possible to close the filter 17 vertically and horizontally, therefore to make the image projected on the spherical screen appear and disappear vertically and horizontally. 5.

Des micro-interrupteur 50, 51 coopérant avec des butées 52, 53 solidaires des disques 32, 36 assurent une temporisation de l'image, c'est-à-dire que la projection de l'image s'arrête après être apparue verticalement puis horizontalement. Cette temporisation montée sur le circuit d'alimentation du moteur 30 permet également à un certain moment d'occulter totalement l'image pendant le temps où le projecteur 10 change de diapositive par rotation du magasin d'images d'une fraction de tour correspondant au nombre de diapositives contenues dans le magasin du projecteur.Micro-switches 50, 51 cooperating with stops 52, 53 integral with the discs 32, 36 ensure a delay of the image, that is to say that the projection of the image stops after having appeared vertically and then horizontally. This time delay mounted on the power supply circuit of the motor 30 also allows at a certain moment to completely obscure the image during the time when the projector 10 changes the slide by rotating the image store by a fraction of a turn corresponding to the number of slides in the projector magazine.

De plus, le circuit d'alimentation du moteur 21 peut comporter un micro-processeur représenté de manière schématique en 21 a, placé dans le circuit d'alimentation de ce moteur 21 entraînant en rotation le filtre 17 pour régler la vitesse de rotation de la polarisation en fonction de la diaspositive projetée. On peut également prévoir d'inclure, dans le circuit d'alimentation du moteur 30 entraînant en rotation par l'intermédiaire des disques 32, 36, l'écran 40, un autre micro-processeur représenté de manière schématique en 30a afin de modifier le temps d'exposition de chaque diapositive. Le micro-processeur 30a peut comporter dans sa mémoire plusieurs programmes de diapositives de façon à permettre une synchronisation de plusieurs appareils de projection (projecteur d'images 10) entre eux, mais dans ce cas, ces projecteurs d'images sont mobiles, par exemple sur un chariot coulissant par rapport au pied 9, pour amener chaque projecteur d'images en position exacte de projection.In addition, the power supply circuit of the motor 21 may include a microprocessor shown schematically at 21 a, placed in the power supply circuit of this motor 21 driving in rotation the filter 17 to adjust the speed of rotation of the polarization according to the projected diaspositive. It is also possible to include, in the power supply circuit of the motor 30 driving in rotation via the disks 32, 36, the screen 40, another microprocessor represented schematically at 30a in order to modify the exposure time of each slide. The microprocessor 30a can have in its memory several slide programs so as to allow synchronization of several projection devices (image projector 10) with one another, but in this case, these image projectors are mobile, for example on a carriage sliding relative to the foot 9, to bring each image projector into the exact projection position.

Bien entendu, l'appareil de projection à écran comporte les réglages habituels pour obtenir une image parfaite sur l'écran sphérique 5.Of course, the screen projection apparatus has the usual settings for obtaining a perfect image on the spherical screen 5.

Il est possible également d'inclure dans l'écran sphérique, c'est-à-dire la bulle, l'ensemble du dispositif de projection et les organes complémentaires en supportant cette bulle par son pôle inférieur ou supérieur ou les deux à la fois, le dispositif étant logé dans la demi-sphère arrière opaque.It is also possible to include in the spherical screen, that is to say the bubble, the entire projection device and the complementary members by supporting this bubble by its lower or upper pole or both , the device being housed in the opaque rear hemisphere.

Claims (3)

1 - Projecting apparatus with spherical screen, more particularly for advertising purposes, wherein the screen-forming sphere is made by a front transparent or translucent half-sphere (5) and by a rear half-sphere (7) which is opaque except in the central region (8) for permitting the projection of images arriving from the optic means (11) of a projector (10) situated behind the screen, this assembly being mounted on a small support-table (3), characterized in that the front face (10a) of the image projector (10) comprises, in front of the optic means (11) of the projector, a platen (15) containing a rotary filter (17) rotatively driven by a motor (21), this filter (17) being occultable by a rotary flap (40) describing an imaginary circle since it is mounted on spindles (41, 42) rigidly connected to discs (32, 36) rotating in synchronism under action of a motor (30), the discs (32, 36) which are vertically aligned and placed in a same vertical plane, being mounted, for the first one, on the shaft (31) of the motor (30) fixed on the back of the platen (15) and, for the other one, on a spindle (37) rigidly connected to the platen (15), this assembly being submitted for the supply of the motor (30) of the flap (40) to micro-switches (50, 51) enabling to stop the rotary flap (40) in choosen positions.
2 - Apparatus according to claim 1, characterized in that at least two microprocessors enable, for the first one, the speed rotation variation of the motor (21) driving the filter (17) in order to vary the polarization rotation speed as a function of the considered slide, and, for the other one, the rotation speed of the motor (30) in order to vary the exposition time of each slide and also to control, with assistance of several image projectors (10), a plurality of programs which are thus synchronized.
3 - Apparatus according to claim 1, characterized in that the whole projecting device (10, 15, 17, 40) is placed inside the spherical screen (5, 7) more specially in the rear opaque half-sphere (7), this apparatus being maintained on a support by at least one of its poles.
EP86402208A 1985-10-10 1986-10-06 Projector with a spherical screen, in particular for advertising purposes Expired - Lifetime EP0224394B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402208T ATE51099T1 (en) 1985-10-10 1986-10-06 PROJECTION DEVICE WITH SPHERICAL SCREEN, PARTICULARLY FOR ADVERTISING PURPOSES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515032 1985-10-10
FR8515032A FR2588684B1 (en) 1985-10-10 1985-10-10 PROJECTION APPARATUS WITH SPHERICAL SCREEN MORE ESPECIALLY FOR ADVERTISING USES

Publications (2)

Publication Number Publication Date
EP0224394A1 EP0224394A1 (en) 1987-06-03
EP0224394B1 true EP0224394B1 (en) 1990-03-14

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EP86402208A Expired - Lifetime EP0224394B1 (en) 1985-10-10 1986-10-06 Projector with a spherical screen, in particular for advertising purposes

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US (1) US4859053A (en)
EP (1) EP0224394B1 (en)
JP (1) JPS6292928A (en)
KR (1) KR870004396A (en)
CN (1) CN1005874B (en)
AT (1) ATE51099T1 (en)
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US5744101A (en) 1989-06-07 1998-04-28 Affymax Technologies N.V. Photolabile nucleoside protecting groups
GB9812969D0 (en) * 1998-06-17 1998-08-12 Cae Invertron Limited Instrument panel
US6409351B1 (en) 2001-02-12 2002-06-25 Thomas R. Ligon Spherical image projection system using a convex reflecting image dispersing element
US7352340B2 (en) * 2002-12-20 2008-04-01 Global Imagination Display system having a three-dimensional convex display surface
US7018053B2 (en) * 2003-10-23 2006-03-28 Hewlett-Packard Development Company, L.P. Projector
JP2006184404A (en) * 2004-12-27 2006-07-13 Nomura Co Ltd Spherical image display device
CN101361023B (en) * 2006-10-06 2011-06-22 拉利兄弟科学有限责任公司 Three-dimensional internal back-projection system and method for using the same
US7611396B2 (en) * 2007-02-27 2009-11-03 Disney Enterprises, Inc. Illuminated balloon with an externally mounted, rear projector
US8091822B2 (en) * 2007-06-20 2012-01-10 Boyce Mark A Aerial image projection system and method of utilizing same
JP2015094938A (en) * 2013-11-14 2015-05-18 株式会社 オルタステクノロジー Display device
CN110262377B (en) * 2019-06-28 2021-08-27 佳木斯大学 Computer projection and projection integrated device and use method thereof

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BR8604852A (en) 1987-07-07
DK442286D0 (en) 1986-09-15
ES2000044B3 (en) 1990-05-16
DE224394T1 (en) 1987-10-15
KR870004396A (en) 1987-05-09
US4859053A (en) 1989-08-22
JPS6292928A (en) 1987-04-28
CN86106760A (en) 1987-05-13
DE3669602D1 (en) 1990-04-19
ES2000044A4 (en) 1987-10-16
ZA867053B (en) 1987-04-29
PT83464B (en) 1992-10-30
CA1278712C (en) 1991-01-08
PT83464A (en) 1986-10-01
NO863945L (en) 1987-04-13
NO863945D0 (en) 1986-10-03
OA08425A (en) 1988-06-30
AU6360086A (en) 1987-04-16
ATE51099T1 (en) 1990-03-15
FR2588684A1 (en) 1987-04-17
FR2588684B1 (en) 1988-01-08
EP0224394A1 (en) 1987-06-03
CN1005874B (en) 1989-11-22
DK442286A (en) 1987-04-11
GR880300109T1 (en) 1988-12-16
AU601952B2 (en) 1990-09-27

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