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Led projector to produce particular light and colour effects

Info

Publication number
WO2010043956A1
WO2010043956A1 PCT/IB2009/007136 IB2009007136W WO2010043956A1 WO 2010043956 A1 WO2010043956 A1 WO 2010043956A1 IB 2009007136 W IB2009007136 W IB 2009007136W WO 2010043956 A1 WO2010043956 A1 WO 2010043956A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
light
projector
leds
elements
led
Prior art date
Application number
PCT/IB2009/007136
Other languages
French (fr)
Inventor
Teodoro Carvali
Alessandro Gazzurelli
Original Assignee
Teodoro Carvali
Alessandro Gazzurelli
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

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B27/00Photographic printing apparatus
    • G03B27/02Exposure apparatus for contact printing
    • G03B27/14Details
    • G03B27/16Illumination arrangements, e.g. positioning of lamps, positioning of reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF
    • F21S8/00Lighting devices intended for fixed installation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00Gas-tight or water-tight arrangements
    • F21V31/005Sealing arrangements therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/04Refractors for light sources of lens shape
    • F21V5/048Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Uses or applications of lighting devices or systems not provided for in codes F21W2101/00 - F21W2121/00
    • F21W2131/40Lighting for industrial, commercial, recreational or military use
    • F21W2131/401Lighting for industrial, commercial, recreational or military use for swimming pools
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

A LED projector to produce particular light and colour effects, comprising transparent front means (1); opaque rear closing means (2) arranged for creating a watertight chamber together with said transparent front means; a plurality of LEDs (7) associated with a control board (6) located in said watertight chamber, wherein between said LEDs (7) and the transparent front closing means (1) a plurality of elements (13) is interposed, which are disposed to refract the light produced by these LEDs (7), said elements (13) being positioned in correspondence to the LEDs (7) and to gaps (10, 11) arranged on an opaque structure (8, 9) supporting said elements (13).

Description

LED PROJECTOR TO PRODUCE PARTICULAR LIGHT AND COLOUR EFFECTS

* * * * *

The invention is directed to the professional outdoor or indoor lighting sector; in particular the invention relates to a LED projector to produce particular light and colour effects, preferably used to illuminate public or private swimming pools, fountains, tubs, etc..

It is known that swimming pools are generally equipped with a lighting system comprising projectors arranged along the walls of the swimming pool, normally in submerged position, to illuminate the pool and also to create a pleasing aesthetic and decorative effect.

Said projectors essentially comprise a bulb, a front flange flush- mounted with the edge of the wall of the swimming pool and a rear dome, fixed to the flange by means of screws, which acts as seal against the bulb body by means of a gasket and protects the electrical contacts.

The bulb can be of the conventional incandescent filament PAR- 64 type, and give white light off, or it is possible to use LED or halogen spotlights of known type, with white, coloured or variable light, with appropriate electronic control.

These projectors have some limits and disadvantages: they allow the pool to be illuminated with white, coloured or selectively alternated light, but do not allow to reproduce particular colour effects of shades and reflections, which would naturally offer a much more pleasing, captivating and decorative aesthetic effect. Moreover, the light emitting points, of whatever kind, are not masked or hidden, but appear through the glass of the front lens, highlighting an outline that can at times be unattractive.

The aim of the invention is to eliminate these disadvantages, improving the functional and aesthetic performances with respect to a conventional projector.

In particular, it is the aim of the invention to create pleasing artistic and decorative effects, reproduced with soft shades and refined refraction effects and moreover, to hide the light emitting points.

A further aim of the invention is to improve the technical and aesthetic performances of the article without increasing energy consumption.

The aim is achieved by means of a LED projector to produce particular light and colour effects, comprising:

- transparent front means;

- opaque rear closing means arranged for creating, together with said transparent front means, a watertight chamber;

- a plurality of LEDs associated with a control board located in said watertight chamber; characterized in that between said LEDs and the transparent front closing means a plurality of elements is interposed, which are disposed to refract the light produced by said LEDs, said elements being positioned in correspondence to the LEDs and to gaps arranged on an opaque structure supporting said elements.

According to an embodiment of the invention, to improve light refraction, said refracting elements comprise natural or synthetic crystals, preferably with a double cusp symmetrical cut, of the diamond or brilliant type, mounted between two coupled disc plates, with appropriate holes, of which at least one plate is opaque.

According to a further embodiment, the transparent front closing means can be made of glass or polycarbonate, or can be produced by means of a lens, to increase the light effect.

Moreover, by positioning each crystal in correspondence to each LED and distributing each pair evenly, the light points are hidden and the only visible effect is the uniformity of the coloured reflections.

The power supply is external, for example of known PWM type, with a higher frequency than that of the human eye, so that using intermittent current a continuous light effect is nonetheless perceived, thus reducing power consumption.

The advantages deriving from the constructional aspects described above consist in obtaining an optical effect that is distinctly more decorative and artistic, and a considerable energy and money saving.

Moreover, the presence of several light sources, rather than a single incandescent filament light, further reduces the need for maintenance operations, as the spotlight continues to emit light even if one of the lighting elements is damaged.

These and other advantages of the invention will be more apparent below, in the description of a preferred embodiment of the invention, provided by way of non-limiting example, and with the aid of the figures, wherein: Fig.1 represents, in cross section, a LED projector produced according to the invention;

Fig. 2 represents an exploded view of the projector of Fig. 1 ;

Fig. 3 represents a detail of a crystal incorporated in a perforated housing of the opaque supporting structure, partially in section.

With reference to Fig. 1 , the LED projector comprises a concave circular structure, shaped with concentric steps, in which at least the front portion 1 is transparent and made of polycarbonate, glass or optical glass. Said shape allows it to contain and support all the other components of the projector. The rear part of the projector comprises an opaque closing disc 2, provided with a hole 3 closed by a watertight cable grommet 4, for entry of a power supply cable 5 connected to a control board 6.

The closing disc 2 is disposed to create together with said front portion 1 a watertight chamber arranged for containing all the components of the projector.

On said control board 6, LEDs 7 are located and uniformly distributed, arranged for emitting white or coloured light with a light flux of around 80 lumens each and with a light beam aperture angle of around 90°. These values are approximate and can vary according to prior art depending on the use required, as regards both the emission depth of the light (variation of the light beam gradation) and the value of the light flux in lumens.

Between the transparent front structure 1 and the LEDs 7 a couple of plates 8, 9 are located, mutually adjacent and both provided with a plurality of holes 10, 11 equal to the number of the LEDs 7 and coaxial therewith. The diameter of said holes is around 10 mm and their inner profile is countersunk, so that coupling of the two plates creates a seat 12 to house refracting elements 13 arranged for refracting the light produced by the LEDs 7.

Said refracting elements 13 are preferably chosen among optical crystals, natural semiprecious or synthetic stones or other known materials, preferably with a double cusp symmetrical cut, but also with a different cut, provided it can refract light. In one embodiment, white, aurora borealis and coloured Swarovski® crystals were used separately or in combination with one another .

At least one of said plates 8 and 9, advantageously the one closer to the LEDs, is made of opaque material, such as aluminized metal, while the other one is made of transparent material, of the type used for the front structure 1. Alternatively, both the plates can be made of opaque material.

Coupling between the front structure 1 and the rear structure 2 to form a inner watertight chamber is produced by interposing gaskets 14, 15 of the O-ring type or other sealing material of known type.

The board 6 and the plates 8 and 9 are fixed to the structure 2 by means of pins 16 inserted in holes 17, 17', 17" and nuts 18, 18'.

With reference to Fig. 2, this shows an exploded view of the projector according to the invention, comprising all the parts of the invention: the transparent front structure 1 shaped in steps, the rear opaque disc structure 2, the electronic control board 6, on which a plurality of LEDs 7 are disposed, the support plates 8 and 9 of the crystals forming the refracting elements 13.

In particular, a layout comprising 19 LEDs, with one of the LEDs in central position, is shown, although the number of LEDs and the layout thereof can naturally be modified freely according to specific application requirements.

On the board 6 and on the plates 8 and 9 three groups of holes 17, 17' and 17" are disposed, each composed of four holes, positioned aligned in a square. These holes are arranged for allowing fixing of the components located inside the watertight chamber produced between the structures 1 and 2 by means of pins 16 and nuts 18 and 18'. The fixings are useful to ensure maximum stability of the components placed inside the projector, to grant that the LEDs 7 and the crystals 13 are perfectly coaxial for a better final aesthetic effect.

Fig. 3 shows a partial section of the pair of plates 8 and 9 housing the crystals 13. It can be seen that the crystal 13 is perfectly symmetrical with respect to the supporting surface between the two plates 8 and 9 and comprises two cusps protruding beyond the thickness of the coupled plates 8 and 9. A circular seat 12, produced in correspondence to the inner profile of each hole 10 and 11 , obtained by coupling countersinkings of these holes, can also be seen. An undercut to steadily house the crystals 13 is therefore produced in said circular seat 12.

According to a preferred embodiment, the projector can be powered at low voltage, for example 12 or 24 V, and with direct current; given the low voltage required, it can also be powered by a battery or by photovoltaic solar panels. If necessary, it can in any case be provided with a power transformer, also preferably housed in the inner watertight chamber. Naturally, the transformer can also be housed in the remote electrical panel, to supply the bulb with an input voltage already transformed.

In order to obtain saving of energy, a known PWM type technology has been used which, exploiting a power-off frequency higher than that perceived by the human eye, creates an effect of continuous light, although it is in actual fact switched on and off in succession. For example, it is possible to use a frequency of 1000 hertz, higher than the sensitivity of the human eye which is around 25 hertz.

The projector can also comprise a sensor and a radio wave or infrared remote control for switching on and off, not shown.

In order to facilitate fitting in existing systems, the projector is produced with a standard diameter, typically 178 mm, equivalent to that of conventional PAR-64 bulb.

The invention can naturally be produced in numerous versions, with different number, colour and cut of the refracting elements, thus forming a creative instrument for interior designers and architects.

As it is apparent to those skilled in the art, in addition to swimming pools, the invention can also be used in fountains, spa or hydromassage tubs and in all submerged applications or applications in damp environments, also in dry environments, indoor or outdoor, such as in public and private buildings, hotels, villas, houses, monuments, theatres, etc., substituting the polycarbonate casing with an equivalent one made of a high heat dissipation material of known type, and in general where a light source with decorative and artistic effect is required, always achieving the advantages mentioned above.

Claims

1. LED projector to produce particular light and colour effects, comprising:
- transparent front means (1);
- opaque rear closing means (2) arranged for creating, together with said transparent front means, a watertight chamber;
- a plurality of LEDs (7) associated with a control board (6) located in said watertight chamber; characterized in that between said LEDs (7) and the transparent front closing means (1) a plurality of elements (13) is interposed, which are disposed to refract the light produced by said LEDs (7), said elements (13) being positioned in correspondence to the LEDs (7) and to gaps (10, 11) arranged on an opaque structure (8, 9) supporting said elements (13).
2. LED projector according to claim 1 , characterized in that said plurality of refracting elements (13) comprises elements chosen from crystals, natural semi-precious or synthetic stones, optical crystals.
3. LED projector according to claim 2, characterized in that said refracting elements (13) present a double cusp symmetrical cut.
4. LED projector according to claim 1 , characterized in that said plurality of refracting elements (13) is arranged on the opaque supporting structure (8, 9) so that each refracting element is coaxial with a LED (7).
5. LED projector according to claim 1 , characterized in that said opaque supporting structure comprises two coupled plates (8, 9).
6. LED projector according to claim 5, characterized in that said coupled plates (8, 9) comprise holes (10, 11) in correspondence to the position of the LEDs, where said refracting elements (13) are housed.
7. LED projector according to claim 6, characterized in that the two plates (8, 9) comprise, in correspondence to the inner profile of the holes (10, 11), countersinkings arranged for creating a circular seat (12) with undercut suitable to keep said refracting elements (13) in a fixed position.
8. LED projector according to claim 5, characterized in that said coupled plates (8, 9) comprise one transparent and one opaque disc.
9. LED projector according to claim 1 , characterized in that said transparent front means (1) comprise an optical lens with amplification properties of the refraction effect.
10. LED projector according to claim 1 , characterized in that it comprises a PWM-type electronic device with a cut-on and cut-off frequency which is higher than that perceived by the human eye.
PCT/IB2009/007136 2008-10-16 2009-10-15 Led projector to produce particular light and colour effects WO2010043956A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITCR20080022 2008-10-16
ITCR2008A000022 2008-10-16

Publications (1)

Publication Number Publication Date
WO2010043956A1 true true WO2010043956A1 (en) 2010-04-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/007136 WO2010043956A1 (en) 2008-10-16 2009-10-15 Led projector to produce particular light and colour effects

Country Status (1)

Country Link
WO (1) WO2010043956A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102818195A (en) * 2012-08-22 2012-12-12 电子科技大学 High uniformity, high power and high light LED (Light Emitting Diode) light source applied to visual inspection
US9360746B2 (en) 2012-08-01 2016-06-07 Pentair Water Pool And Spa, Inc. Underwater image projection system and method
US9423608B2 (en) 2012-08-01 2016-08-23 Pentair Water Pool And Spa, Inc. Multidimensional rotary motion apparatus moving a reflective surface and method of operating same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632551A (en) * 1994-07-18 1997-05-27 Grote Industries, Inc. LED vehicle lamp assembly
US20030048632A1 (en) * 2001-09-07 2003-03-13 Roy Archer Light emitting diode pool assembly
WO2003044870A1 (en) * 2001-11-22 2003-05-30 Mireille Georges Light-emitting diode illuminating optical device
US6616291B1 (en) * 1999-12-23 2003-09-09 Rosstech Signals, Inc. Underwater lighting assembly
EP1460333A1 (en) * 2003-03-18 2004-09-22 Cappa S.n.c. A projector for swimming pools emitting selectively variable coloured light
US20060002104A1 (en) * 2004-06-30 2006-01-05 Willis Vance E Underwater LED light
US20060187652A1 (en) * 2005-02-22 2006-08-24 Kevin Doyle LED pool or spa light having unitary lens body

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632551A (en) * 1994-07-18 1997-05-27 Grote Industries, Inc. LED vehicle lamp assembly
US6616291B1 (en) * 1999-12-23 2003-09-09 Rosstech Signals, Inc. Underwater lighting assembly
US20030048632A1 (en) * 2001-09-07 2003-03-13 Roy Archer Light emitting diode pool assembly
WO2003044870A1 (en) * 2001-11-22 2003-05-30 Mireille Georges Light-emitting diode illuminating optical device
EP1460333A1 (en) * 2003-03-18 2004-09-22 Cappa S.n.c. A projector for swimming pools emitting selectively variable coloured light
US20060002104A1 (en) * 2004-06-30 2006-01-05 Willis Vance E Underwater LED light
US20060187652A1 (en) * 2005-02-22 2006-08-24 Kevin Doyle LED pool or spa light having unitary lens body

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9360746B2 (en) 2012-08-01 2016-06-07 Pentair Water Pool And Spa, Inc. Underwater image projection system and method
US9423608B2 (en) 2012-08-01 2016-08-23 Pentair Water Pool And Spa, Inc. Multidimensional rotary motion apparatus moving a reflective surface and method of operating same
US9435997B2 (en) 2012-08-01 2016-09-06 Pentair Water Pool And Spa, Inc. Multidimensional rotary motion apparatus moving a reflective surface and method of operating same
US9813684B2 (en) 2012-08-01 2017-11-07 Pentair Water Pool And Spa, Inc. Underwater image projection system and method
CN102818195A (en) * 2012-08-22 2012-12-12 电子科技大学 High uniformity, high power and high light LED (Light Emitting Diode) light source applied to visual inspection

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