FR2614114A1 - Transportable device for back-projections - Google Patents

Transportable device for back-projections Download PDF

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Publication number
FR2614114A1
FR2614114A1 FR8705399A FR8705399A FR2614114A1 FR 2614114 A1 FR2614114 A1 FR 2614114A1 FR 8705399 A FR8705399 A FR 8705399A FR 8705399 A FR8705399 A FR 8705399A FR 2614114 A1 FR2614114 A1 FR 2614114A1
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FR
France
Prior art keywords
optical mirror
foldable
translucent screen
projection
hinge
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Withdrawn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
FR8705399A
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French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8705399A priority Critical patent/FR2614114A1/en
Publication of FR2614114A1 publication Critical patent/FR2614114A1/en
Withdrawn legal-status Critical Current

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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
    • G03B21/10—Projectors with built-in or built-on screen

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

Device for obtaining a back-projected image from various projection sources. The invention relates to a transportable device composed of a case, in which the projector and a first optical mirror are housed. During operation, the case fits at the front face of the foldable part, giving the user direct control of the screen in order to make adjustments. The image leaving the first optical mirror is displayed on the translucent screen 4 after reflection on a larger optical mirror 15. The part 3 comprises seven hinges, the folding is such that the fragile parts, optical mirror 15, translucent screen 4, are protected by the uprights 13 and 18. The folded assembly has the form of a thin right-angled parallepiped. The device according to the invention is in particular intended for video projection users in showrooms.

Description

La présente invention concerne un dispositif transportable pouvant recevoir tout appareil de projection (vidéo-projecteur, projecteur de diapositives ...) pour obtenir une image de grande dimension en rétro-projection. The present invention relates to a transportable device which can receive any projection device (video projector, slide projector, etc.) for obtaining a large image in rear projection.

La projection directe pose un problème de luminosité ambiante et un problème de réglage du projecteur après un déplacement de celui-ci. Direct projection poses a problem of ambient brightness and a problem of adjusting the projector after moving it.

La rétro-projection traditionnelle fait appel a un meuble lourd, volumineux donc difficilement transportable, dans lequel la source de projection n'est pas interchangeable. Traditional rear projection uses a heavy, bulky piece of furniture which is therefore difficult to transport, in which the source of projection is not interchangeable.

Le dispositif selon l'invention permet de remédier å ces inconvénients. Il comporte en effet une première partie formé d'un caisson mor,té sur roulettes équipé d'un premier miroir optique dans lequel vient se positionner a l'aide d'un plan inclinable la source de projection. The device according to the invention overcomes these drawbacks. It indeed has a first part formed by a mor box, tee on casters equipped with a first optical mirror in which is positioned using a tilting plane the projection source.

Selon une variante, le projecteur peut etre solidement fixé sur le plan inclinable au moyen d'une sangle, ce qui autorise les transports en toute sécurité. Alternatively, the projector can be securely attached to the tilting plane by means of a strap, which allows transport safely.

La seconde partie contient un autre miroir optique et 1 écran translucide de visualisation. C'est la partie la plus volumineuse du meuble mais elle est entièrement repliable. The second part contains another optical mirror and 1 translucent display screen. It is the most voluminous part of the piece of furniture but it is entirely foldable.

L'avant du caisson vient s'emboiter dans cette seconde partie pour former un seul et unique ensemble réalisé en profiles aluminium anodisés et panneaux de contreplaqué pour la rigidité et la légèreté.The front of the box fits into this second part to form a single and unique set made of anodized aluminum profiles and plywood panels for rigidity and lightness.

Les dessins annexés illustrent l'invention :
La figure 1 représente en perspective la partie repliable du meuble.The accompanying drawings illustrate the invention:
Figure 1 shows in perspective the foldable part of the cabinet.

La figure 2 représente en coupe le caisson recevant la source de projection. Figure 2 shows in section the box receiving the projection source.

Le dispositif représenté sur la figure i comporte au total 7 charnières dont l'angle d'ouverture maximum est de iSO0
Elles sont fixées au moyen de rivets ou de vis sur les cornières en aluminium qui encadrent chaque partie repliable.The device shown in Figure i has a total of 7 hinges with a maximum opening angle of iSO0
They are fixed by means of rivets or screws on the aluminum angles which frame each folding part.

La paroi (13), représenté en figure 1, dont les dimensions sont de l'ordre de 98 cm pour la largeur et 125 cm pour la longueur, a un double emploi : d'une part elle assure la rigidité de l'ensemble déplié, et d'autre part la protection du miroir optique (15) et de la face interne de l'écran translucide (4) lorsque l'ensemble est replié. The wall (13), represented in FIG. 1, the dimensions of which are of the order of 98 cm for the width and 125 cm for the length, has a double use: on the one hand it ensures the rigidity of the unfolded assembly , and secondly the protection of the optical mirror (15) and of the internal face of the translucent screen (4) when the assembly is folded.

La paroi (18), représenté en figure 1, reçoit l'avant du caisson de la figure 2. Le couvercle (9) permet l'ajustage de ces deux ensembles et l'étanchéité lumineuse en fonctionnement normal.The wall (18), shown in Figure 1, receives the front of the box of Figure 2. The cover (9) allows the adjustment of these two sets and the light tightness in normal operation.

repliage, la paroi (18) protège la face externe de l'écran translucide (4).folding, the wall (18) protects the external face of the translucent screen (4).

Chaque montant latéral (10) se replie à mi-hauteur sur lui meme pour etre ensuite rabattu sur la face intérieur de la paroi (18) suivant l'axe vertical constitué de la charnière (12).Each lateral upright (10) folds halfway up on itself to then be folded down on the inside of the wall (18) along the vertical axis consisting of the hinge (12).

Ainsi replié, l'ensemble s'apparente a un parallélépipède rectangle dont les dimensions sont de l'ordre de 107 cm x 13 cm x 12 cm, suffisamment rigide pour supporter le poids du caisson lors du transport dans un véhicule.Thus folded, the assembly is similar to a rectangular parallelepiped whose dimensions are of the order of 107 cm x 13 cm x 12 cm, rigid enough to support the weight of the box during transport in a vehicle.

Le dispositif selon l'invention est particulièrement destiné aux utilisateurs de vidéo-projecteur dans des lieux très lumineux comme les salles de conférence ou les expositions.  The device according to the invention is particularly intended for users of video projectors in very bright places such as conference rooms or exhibitions.

Claims (6)

REVEND ZCT IONS  RESELL ZCT IONS te Dispositif transportable pour obtenir d'une source de projection quelconque une image de grande dimensions en rétro-projection caractérisé en ce qu'il comporte un caisson 1 recevant l'appareil de projection (2) venant s'emboiter dans une partie repliable 3 équipée d'un écran translucide (4) sur lequel apparait par transparence l'image réfléchie sur les miroirs optiques (5) et (15).  te Transportable device for obtaining from any projection source a large image in rear projection, characterized in that it comprises a box 1 receiving the projection device (2) which fits into a folding part 3 equipped a translucent screen (4) on which appears by transparency the image reflected on the optical mirrors (5) and (15). 2) Dispositif selon la revendication 1) caractérisé en ce que la double charniére (8) reçoie un couvercle (7) pour installer et régler le projecteur et un couvercle (9) pour positionner le caisson 1 sur la partie repliable 32) Device according to claim 1) characterized in that the double hinge (8) receives a cover (7) to install and adjust the projector and a cover (9) to position the box 1 on the foldable part 3 3) Dispositif selon la revendication 1) caractérisé en ce que les parois latérales (10) soient repliables a mi-hauteur suivant les charnières (11) puis pivotables suivant les charnières (12) sur le montant (18).3) Device according to claim 1) characterized in that the side walls (10) are foldable halfway along the hinges (11) and then pivotable according to the hinges (12) on the upright (18). 4) Dispositif selon la revendication 1) caractérisé en ce que la protection (1) soit repliable suivant la charniére (14) sur le miroir optique (15).4) Device according to claim 1) characterized in that the protection (1) is foldable according to the hinge (14) on the optical mirror (15). 5) Dispositif selon la revendication 1) ou la revendication 4) caractérisé en ce que l'ensemble miroir optique (15) et protection ( soit repliable suivant la charnière (16) sur l'écran translucuide (4).5) Device according to claim 1) or claim 4) characterized in that the optical mirror (15) and protection assembly (is foldable along the hinge (16) on the translucent screen (4). 6) Dispositif suivant 1 'une quelconque des revendications précédentes caractérisé en ce que 1 'ensemble miroir optique (15) , écran translucide (4), protégés par le battant (13), soit repliable suivant la charnière (17) sur le montant (18). 6) Device according to any of the preceding claims, characterized in that the optical mirror assembly (15), translucent screen (4), protected by the leaf (13), is foldable according to the hinge (17) on the upright ( 18).
FR8705399A 1987-04-16 1987-04-16 Transportable device for back-projections Withdrawn FR2614114A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8705399A FR2614114A1 (en) 1987-04-16 1987-04-16 Transportable device for back-projections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8705399A FR2614114A1 (en) 1987-04-16 1987-04-16 Transportable device for back-projections

Publications (1)

Publication Number Publication Date
FR2614114A1 true FR2614114A1 (en) 1988-10-21

Family

ID=9350181

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8705399A Withdrawn FR2614114A1 (en) 1987-04-16 1987-04-16 Transportable device for back-projections

Country Status (1)

Country Link
FR (1) FR2614114A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683610A2 (en) * 1994-05-17 1995-11-22 Projectavision, Inc. Rear-screen video display system
FR2778756A1 (en) * 1998-05-14 1999-11-19 A D Communication Transportable multiple screen multimedia display
GB2436150A (en) * 2006-03-15 2007-09-19 David Robert Daniels Mirror box for phantom limb pain reduction therapy

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0683610A2 (en) * 1994-05-17 1995-11-22 Projectavision, Inc. Rear-screen video display system
EP0683610A3 (en) * 1994-05-17 1996-01-03 Projectavision Inc
FR2778756A1 (en) * 1998-05-14 1999-11-19 A D Communication Transportable multiple screen multimedia display
GB2436150A (en) * 2006-03-15 2007-09-19 David Robert Daniels Mirror box for phantom limb pain reduction therapy
GB2436150B (en) * 2006-03-15 2010-06-02 David Robert Daniels Mirror box for phantom limb pain relief therapy

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