WO2017145037A1 - Vidéoprojecteur pour projeter des images et système de vidéoprojection pour projeter des images - Google Patents

Vidéoprojecteur pour projeter des images et système de vidéoprojection pour projeter des images Download PDF

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Publication number
WO2017145037A1
WO2017145037A1 PCT/IB2017/050948 IB2017050948W WO2017145037A1 WO 2017145037 A1 WO2017145037 A1 WO 2017145037A1 IB 2017050948 W IB2017050948 W IB 2017050948W WO 2017145037 A1 WO2017145037 A1 WO 2017145037A1
Authority
WO
WIPO (PCT)
Prior art keywords
video
projection system
video projector
sheet
projector
Prior art date
Application number
PCT/IB2017/050948
Other languages
English (en)
Inventor
Maurizio Cini
Domenico Toffoli
Original Assignee
Sim2 Bv International S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ITUA2016A002139A external-priority patent/ITUA20162139A1/it
Application filed by Sim2 Bv International S.R.L. filed Critical Sim2 Bv International S.R.L.
Publication of WO2017145037A1 publication Critical patent/WO2017145037A1/fr

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
    • G03B21/14—Details
    • G03B21/145—Housing details, e.g. position adjustments thereof

Definitions

  • VIDEO PROJECTOR FOR PROJECTING IMAGES
  • VIDEO PROJECTION SYSTEM FOR PROJECTING IMAGES
  • the present invention relates to a video projector for projecting images, in particular to be embedded into pieces of furniture, walls or ceilings.
  • Audio-video systems are becoming increasingly indispensable in people's daily life and are nowadays widespread.
  • video projection systems that in the last century were tools intended for professional use are now becoming, due to technological development and new image processing techniques, products that can be used as an alternative to television sets.
  • Short-throw projectors are known, which can be positioned in the place of a normal television set and allow projecting an image onto an opposite wall, thus replacing the screen of the television set.
  • audio/video devices such as satellite and terrestrial decoders, DVD readers, CD readers, tuners and audio amplifiers are now available as compact units.
  • solutions have been developed wherein the television apparatus is replaced by a "short-throw" video projection apparatus, preferably inserted into a furniture module (drawer or openable compartment), or directly embedded into a wall or the ceiling of a room, arranged within a lift allowing the video projector to be moved outwards from the inside of the furniture module or ceiling, thus making the image visible on the adjacent wall.
  • a "short-throw" video projection apparatus preferably inserted into a furniture module (drawer or openable compartment), or directly embedded into a wall or the ceiling of a room, arranged within a lift allowing the video projector to be moved outwards from the inside of the furniture module or ceiling, thus making the image visible on the adjacent wall.
  • the video projectors currently available cannot be inserted into a piece of furniture/wall/ceiling without solution of continuity with the external surface of the piece of furniture (or wall/ceiling); therefore, they are laid on a shelf of the piece of furniture or, by means of suitable brackets, they are hung to the ceiling, or they are inserted into suitable compartments covered by sheets made of different materials, which have to be removed (e.g. slid) to allow displaying the image.
  • FIG. 1 is a perspective view of a video projector according to the present invention
  • FIG. 2 is a block diagram of a video projection system according to the present invention.
  • a piece of furniture/wall/ceiling which, in the place of a door wing, a compartment or a portion of the surface of the piece of furniture or wall/ceiling, has a transparent sheet (in particular, made of glass) that is crossed with no loss of quality by a light beam generated by a video projector arranged in the back, which can thus project an image.
  • a transparent sheet in particular, made of glass
  • the video projector of the present invention can be built into a piece of furniture or a wall, or it may be simply laid on a shelf of a piece of furniture, thus projecting the image onto a wall behind it, or it may be positioned on the ceiling, thus projecting the image on a wall under it.
  • the video projector of the present invention is covered with a sheet, in particular a glass sheet, secured to and integral with the video projector itself.
  • the video projection system of the present invention is preferably conceived for use mainly as a built-in system, which can be inserted into pieces of furniture, walls or ceilings by using built-in techniques.
  • Said video projection system comprises a video projector for emitting a light beam and a sheet made of transparent material, in particular glass, coupled to the video projector.
  • the video projector and the video projection system according to the present invention comprise, therefore, a covering sheet or glass having a surface sufficiently large to allow the passage of the image to be projected therethrough and capable of:
  • FIG. 1 shows a video projector 1 according to the present invention, which comprises a casing 2 for containing a per se known image projection system and a covering sheet 4 made of transparent material, in particular glass, for sealing said casing 2 and making it perfectly flat on one side.
  • a covering sheet 4 made of transparent material, in particular glass, for sealing said casing 2 and making it perfectly flat on one side.
  • the video projector 1 can be perfectly aligned with a surface of a piece of furniture (or a wall/ceiling) into which it is inserted.
  • the projection system of the video projector 1 is arranged to emit a light beam incident on said covering sheet 4, so that, after the light beam has crossed the latter, a visual image is projected onto an opposite wall.
  • the angle of incidence of said light beam or ray coming from the video projector 1 onto the covering sheet 4 is preferably variable in the range of 22° to 83°.
  • the reflection of a light ray passing through a surface dividing two materials having different refraction indices is defined by the Fresnel equations, and it is known that reflectivity increases rapidly once the Brewster angle has been exceeded.
  • the covering sheet 4 is coated, preferably on both sides (or, alternatively, on just one side), with a multilayer coating, preferably having fourteen (14) layers.
  • the covering sheet 4 is preferably of the type commonly used for car headlamps, which, within a range of angles of incidence of the light beam comprised between 0° and 60°, shows a residual reflectivity lower than 3%, preferably 2%, in the VIS (visible spectrum of light).
  • the video projector 1 is equipped with a WA (Wide Angle) lens, i.e. a short-throw and ultrashort-throw projection lens having a predetermined visual field, e.g. 70°.
  • WA Wide Angle
  • the video projector 1 projects a light beam at a predetermined angle, preferably 47.5°.
  • the total angle of incidence obtained is as defined below: visual field 70°
  • a multilayer coating is applied onto the covering sheet 4, as aforementioned, to widen the angle of incidence.
  • the covering sheet 4 has some blur that depends on the optical path followed by the light beam in the covering sheet 4 itself; therefore, by reducing the thickness of the covering sheet 4, e.g. from 8mm to 6mm, 4mm or 3mm, it is possible to reduce such phenomenon.
  • the covering sheet 4 allows:
  • the covering sheet 4 is sealed together with the casing 2, so as to make the latter resistant to water and dust-tight, thus allowing the video projector 1 to be installed in dusty or damp environments.
  • the video projector 1 is adapted for use both as a stand-alone device, e.g. to be laid on a piece of furniture, and as a built-in video projector, which can be inserted into pieces of furniture, walls or ceilings by using embedding techniques.
  • the video projector 1 may also comprise one or more of the following elements (not shown in the annexed drawings):
  • At least one video and/or audio device connected to the video projector 1, in particular via at least one connection implemented by using different technologies, such as cable, optical fiber, wi-fi or any other suitable technology;
  • an adjustment and alignment system in particular a manual, mechanical or electronic one.
  • Figure 2 shows a block diagram of a variant of the present invention. Said block diagram schematically shows a video projection system 10 for projecting images according to the present invention.
  • Said video projection system 10 comprises a video projector 11, in particular of the short- throw or ultrashort-throw type, equipped with an image projection system arranged to emit a light beam.
  • the video projection system 10 comprises a sheet 14 made of transparent material, in particular glass, coupled to the video projector 11, said sheet 14 being coated, on at least one side, with a plurality of optical layers, so that, when said light beam hits said sheet 14 within a predetermined range of angles of incidence, the sheet 14 shows a residual reflectivity lower than 3% of the visible spectrum of light (VIS).
  • the image projection system of the video projector 11 is of a per se known type and is adapted to direct light towards said sheet 14 in such a way that, after the light has crossed the sheet, a visual image is projected onto an opposite wall.
  • Said range of angles of incidence of the light beam or ray coming from the video projector 1 onto the sheet 14 is preferably variable in the range of 22° to 83°.
  • the sheet 14 is coated, on at least one side (preferably on both sides), with a multilayer coating, preferably having fourteen layers.
  • the sheet 14 is preferably of the type commonly used for car headlamps, which, within a range of angles of incidence of the light beam comprised between 0° and 60°, shows a residual reflectivity lower than 3%, preferably 2%, in the VIS (visible spectrum of light).
  • the video projector 10 is equipped with a WA (Wide Angle) lens, i.e. a short-throw and ultrashort-throw projection lens, having a predetermined visual field, in particular substantially equal to 70°.
  • WA Wide Angle
  • the video projector 10 projects a light beam at a predetermined angle, preferably equal to 47.5°, and when the sheet 14 is coupled to said projector 10 a total angle of incidence is obtained like the one defined in the equation concerning the video projector 1 of Fig. 1.
  • a multilayer coating is applied onto the sheet 14 as aforementioned.
  • the sheet 14 has some blur that depends on the optical path followed by the light beam in the glass 4; in order to reduce such phenomenon, therefore, said sheet 14 has a thickness smaller than or equal to 8mm.
  • the video projection system 10 may comprise at least one video and/or audio device 15 connected to the video projector 11, in particular via at least one connection (designated by letter a in Fig. 2) that can be implemented by means of different technologies, such as cable, optical fiber, wi-fi or any other suitable technology.
  • the video projection system 10 may also comprise a cooling system 16 for dissipating the heat produced by at least one component of the video projection system 10, in particular by the video projector 11 and/or by said at least one audio and/or video device 15.
  • a cooling system 16 for dissipating the heat produced by at least one component of the video projection system 10, in particular by the video projector 11 and/or by said at least one audio and/or video device 15.
  • the video projection system 10 may then comprise an adjustment and alignment system 17 for adjusting and aligning the video projector 11.
  • said adjustment and alignment system 17 may comprise handling means (see the element designated by letter b in Fig. 2) providing adjustment in the three directions of linear motion (x,y,z) and in the three directions of rotation (roll, pitch, yaw - rotation in the horizontal plane) of the video projector 11 ; it should be noted that said handling means b may be associated with a support base (not shown) of the video projector 11 and may be either of the manual type (e.g. implemented as a short-pitch screw-type mechanical device) or of the motorized type (e.g. implemented as electrically-operated motor educers).
  • the manual type e.g. implemented as a short-pitch screw-type mechanical device
  • motorized type e.g. implemented as electrically-operated motor educers
  • the adjustment and alignment system 17 may be provided with a fixing system (not shown) for coupling the video projector 11 to the manual, mechanical or electronic adjustment and alignment system 17.
  • said fixing system may provide adjustment on the aforementioned six axes, e.g. by means of special adjusters (not shown) positioned between the video projector 11 and the piece of furniture into which said video projector 11 is embedded, and providing adjustment of the base of the video projector 11.
  • the video projection system 10 may then comprise or be coupled to power supply means for supplying power to the various components, for example said power supply means 18 comprising a power socket 18 connected to said components via a set of cables (shown schematically in Fig. 2 and designated by the letters c, d, e, f).
  • power supply means 18 comprising a power socket 18 connected to said components via a set of cables (shown schematically in Fig. 2 and designated by the letters c, d, e, f).
  • the video projection system 10 is adapted for use mainly as a built-in system to be inserted into pieces of furniture, walls or ceilings by using embedding techniques, preferably in such a way that the sheet 14 is substantially aligned with a surface of a piece of furniture (or a wall/ceiling) into which it is inserted.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

L'invention concerne un vidéoprojecteur (1) qui permet de projeter des images et qui comprend un boîtier (2) pour contenir un système de projection d'images conçu pour émettre un faisceau lumineux, ledit vidéoprojecteur (1) comprenant une feuille de couverture (4) constituée de matériau transparent, notamment du verre, pouvant sceller ledit boîtier (2), ladite feuille de couverture (4) étant recouverte, sur au moins un côté, d'une pluralité de couches optiques de telle sorte que, lorsque ledit faisceau lumineux touche ladite feuille de couverture (4) dans une plage prédéterminée d'angles d'incidence, la feuille de couverture (4) présente une réflectivité résiduelle inférieure à 3 % du spectre de lumière visible (VIS). L'invention concerne également un système de vidéoprojection correspondant.
PCT/IB2017/050948 2016-02-22 2017-02-20 Vidéoprojecteur pour projeter des images et système de vidéoprojection pour projeter des images WO2017145037A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITUA201656518 2016-02-22
IT202016000016887 2016-02-22
ITUA2016A002139A ITUA20162139A1 (it) 2016-03-31 2016-03-31 Videoproiettore per la proiezione di immagini
IT102016000032959 2016-03-31

Publications (1)

Publication Number Publication Date
WO2017145037A1 true WO2017145037A1 (fr) 2017-08-31

Family

ID=58530587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/050948 WO2017145037A1 (fr) 2016-02-22 2017-02-20 Vidéoprojecteur pour projeter des images et système de vidéoprojection pour projeter des images

Country Status (1)

Country Link
WO (1) WO2017145037A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781090A (en) * 1972-11-06 1973-12-25 Minolta Camera Kk Four layer anti-reflection coating
US4046437A (en) * 1974-11-19 1977-09-06 Aristide Leon Caron Combination cabinet for audio-visual teaching
US4387960A (en) * 1980-03-31 1983-06-14 Minolta Camera Co. Ltd. Multi-layer anti-reflection coating
US5170291A (en) * 1989-12-19 1992-12-08 Leybold Aktiengesellschaft Coating, composed of an optically effective layer system, for substrates, whereby the layer system has a high anti-reflective effect, and method for manufacturing the coating
WO2011044519A2 (fr) * 2009-10-09 2011-04-14 Yazaki Corporation Revêtements antireflet durables
EP2590017A1 (fr) * 2011-11-04 2013-05-08 Ricoh Company, Ltd. Appareil de projection d'images

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781090A (en) * 1972-11-06 1973-12-25 Minolta Camera Kk Four layer anti-reflection coating
US4046437A (en) * 1974-11-19 1977-09-06 Aristide Leon Caron Combination cabinet for audio-visual teaching
US4387960A (en) * 1980-03-31 1983-06-14 Minolta Camera Co. Ltd. Multi-layer anti-reflection coating
US5170291A (en) * 1989-12-19 1992-12-08 Leybold Aktiengesellschaft Coating, composed of an optically effective layer system, for substrates, whereby the layer system has a high anti-reflective effect, and method for manufacturing the coating
WO2011044519A2 (fr) * 2009-10-09 2011-04-14 Yazaki Corporation Revêtements antireflet durables
EP2590017A1 (fr) * 2011-11-04 2013-05-08 Ricoh Company, Ltd. Appareil de projection d'images

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