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WO2017129506A1 - An assembly of a shade and a light source - Google Patents

An assembly of a shade and a light source Download PDF

Info

Publication number
WO2017129506A1
WO2017129506A1 PCT/EP2017/051276 EP2017051276W WO2017129506A1 WO 2017129506 A1 WO2017129506 A1 WO 2017129506A1 EP 2017051276 W EP2017051276 W EP 2017051276W WO 2017129506 A1 WO2017129506 A1 WO 2017129506A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
emitting elements
shade
light source
assembly according
Prior art date
Application number
PCT/EP2017/051276
Other languages
French (fr)
Inventor
Mathias CHRISTIANSEN
Bo Puggaard HANSEN
Original Assignee
Shade Aps
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 Shade Aps filed Critical Shade Aps
Publication of WO2017129506A1 publication Critical patent/WO2017129506A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00Lighting devices intended to be free-standing
    • F21S6/005Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting
    • F21S6/008Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting with a combination of direct and indirect lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • F21K9/23Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00Lighting devices or systems producing a varying lighting effect
    • F21S10/02Lighting devices or systems producing a varying lighting effect changing colors
    • F21S10/023Lighting devices or systems producing a varying lighting effect changing colors by selectively switching fixed light sources
    • 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
    • F21V1/00Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • 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
    • F21V13/00Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02Combinations of only two kinds of elements
    • 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
    • F21V7/00Reflectors for light sources
    • F21V7/0008Reflectors for light sources providing for indirect lighting
    • F21V7/0016Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/045Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor receiving a signal from a remote controller
    • 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
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/50Light sources with three-dimensionally disposed light-generating elements on planar substrates or supports, but arranged in different planes or with differing orientation, e.g. on plate-shaped supports with steps on which light-generating elements are mounted
    • 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
    • F21Y2107/00Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/90Light sources with three-dimensionally disposed light-generating elements on two opposite sides of supports or substrates
    • 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
    • F21Y2113/00Combination of light sources
    • F21Y2113/10Combination of light sources of different colours
    • 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]

Definitions

  • the present invention relates to an assembly of a shade and a light source provided inside the shade.
  • the assembly is configured to provide light in at least three different directions: a first, second and third direction.
  • Intelligent or smart lamps may be seen in e.g. http : 7/q etf I uxo.com/. where a complete lamp is illustrated being able to selectively emit light upwardly and downwardly in different directions.
  • It is an object of embodiments of the invention to provide a lighting assembly comprising a shade with a light source positioned inside the shade, the assembly being capable of generating light in at least three directions, upwardly, downwardly and to the sides, toward the shade.
  • the present invention relates to an assembly of a shade and a light source positioned inside the shade, wherein:
  • the shade is light transmissive
  • the light source has:
  • One or more first light-emitting elements configured to emit white light in first direction
  • One or more second light-emitting elements configured to emit white light in a second direction being opposite to the first direction
  • the shade is a light transmissive element.
  • the shade is preferably "light transmissive", when it transmits at least 10 % of the intensity of light of a predetermined wavelength emitted from the light source.
  • This predetermined wavelength preferably is within the visible wavelength range of light, such as 390-700nm. It is preferred that the shade is configured to transmit at least 10% of the light emitted thereto of light in a wavelength interval with a width of at least lOnm, such as at least 50nm, such as at least lOOnm.
  • the shade may be a lampshade that can be mounted on a wall, desk, floor, etc. or hanging from e.g. a celling or the like.
  • the shade will comprise a light transmissive element such as paper, parchment, woven and breaded fabrics, silk, etc. and a supporting structure, such as metal struts or wires.
  • the shade can have different shapes, such as pyramidal, conical, cylindrical, elliptical, spherical, parabolic, or the like.
  • the light source may be attached to the shade via a plurality of wires, struts or the like.
  • the light source can comprise a standard lightbulb socket or other electrical connection if desired.
  • a standard lightbulb socket used in domestic appliances may be the E10, El l, E12, E14, E17, E26/27, E40 as well as pre-focus or bayonet socket types.
  • a light-emitting element is a device which is configured to emit light, usually by receiving an electrical signal.
  • the light-emitting element may emit light of a single predetermined wavelength, or it may emit light in an interval having a width of several nm.
  • Preferred light-emitting elements are configured to emit white light or coloured light, such as red light, blue light, green light or the like. Naturally, light emitted from coloured light- emitting elements may be combined to generate white light or light of other colours if desired.
  • the first, second and third light-emitting elements may be light- emitting diodes (LEDs) of different colours and/or sizes. Other types of light-emitting elements are laser diodes, OLEDS or the like. Even though it is possible to direct light from a single light-emitting element into different directions, it is preferred that the first, second and third light-emitting elements are separate groups of light-emitting elements.
  • the first light-emitting elements may be selected to and/or configured to output white light of a desired intensity.
  • the third light-emitting elements may be selected to and/or configured to output light of a desired colour and/or intensity.
  • the first and second directions are opposite to each other.
  • light is usually emitted not along a single direction but within a beam or fan having a cone-shape or the like.
  • the direction of a beam then may be a direction within this fan/cone, such as an axis of symmetry thereof if an axis of symmetry exists.
  • the third direction is at least substantially perpendicular to the first direction.
  • the light emitted in the third direction preferably will be within a fan/cone, or rather in a plane (i.e. as a disc) at least substantially perpendicular to the first direction. Again, perpendicular to this plane, the light emitted may fan out.
  • the third direction is within this fan-shaped radiation.
  • the shade has a tubular outline having an axis of symmetry, such as an axis of rotational symmetry, along the first/second directions.
  • the third direction directs light toward the shade to illuminate the shade as a lamp normally is.
  • the fan-shape of the light from the third light-emitting elements may be adapted to the shade so that at least substantially all of the shade may be illuminated by the third light-emitting elements.
  • the light emitted from the first, second and third light-emitting elements do not overlap.
  • the fan-shaped beams may overlap.
  • the shade has a first opening and a second opening.
  • the first and second openings may be positioned at opposite sides or ends of the shade.
  • the first and second openings may be of different sizes and shapes, such as circular, triangular, square, hexagonal, etc.
  • the one or more first light-emitting elements of the light source are configured to emit white light toward the first opening.
  • at least part of the light emitted from the first light-emitting elements passes through the first opening.
  • the one or more second light-emitting elements are configured to emit white light toward the second opening.
  • at least part of the light emitted from the second light-emitting elements passes through the second opening.
  • the light source comprises a planar printed circuit board (PCB) which physically supports the light-emitting elements.
  • the PCB has a first and second surface, preferably the main surfaces thereof, opposed to each other.
  • the first light-emitting elements are fixed to the first surface
  • the second light-emitting elements are fixed to the second surface
  • the third light-emitting elements are fixed to the first and/or second surface.
  • the PCB may act to electrically connect to the light-emitting elements and/or to assist in dissipating heat from the light-emitting elements.
  • the light source may comprise two or more separated PCBs carrying the light-emitting elements, where one PCB has the first surface and the light-emitting elements connected thereto and the other PCB has the other surface and the light-emitting elements connected thereto. Under all circumstances, the PCB(s) may be connected to a power supply of any desired type (battery, solar cell, mains or the like).
  • the light source comprises one or more light-reflecting elements.
  • a light-reflecting element is an optical device which is configured to reflect light directed to it from one direction to another direction.
  • light-reflecting elements are configured to reflect the light emitted from the third light-emitting elements into the third direction.
  • the reflecting element may be a transmissive element, such as an optical lens, or a diffractive/reflective element, such as a mirror, which may be e.g. an aluminium reflector or any other kind of reflective surface.
  • the light-reflecting element may be made from a heat dissipating metal dissipating the heat generated by the third light-emitting elements.
  • a heat sink i.e. heat dissipating element, may be included adjacent to the reflecting element or the light-emitting elements.
  • the light source may also comprise heat dissipating elements, for dissipating heat generated by the first and second light-emitting elements.
  • the light source may further comprise one or more light diffusers.
  • the light diffuser is an element which diffuses light.
  • a diffuser can be any translucent element, typically made of different types of glass, plastic, teflon, etc.
  • the desired operation of a light diffuser is to have the brightness of light scattered from a diffuser appear to be the same from any angle of view.
  • the diffuser(s) may have a wide range of shapes and sizes. The shape and size of the diffusers may at least partly determine an angle of the light emitted by the source.
  • the light diffusers may diffuse the light emitted from the first, second and/or third light-emitting elements. According to one embodiment, the diffuser(s) is/are arranged around the light-emitting elements.
  • one light diffuser is providing for diffusing the light emitted from the first light-emitting elements
  • another light diffuser is provided for diffusing the light emitted from the second light-emitting elements
  • yet another one is provided for diffusing the light emitted from the third light-emitting elements.
  • the first and/or second light-emitting elements may be configured to output light within a controllable brightness and/or light intensity while the third light-emitting elements may be configured to output light with a controllable colour, brightness and/or light intensity.
  • a controllable colour may be obtained from differently coloured light-emitting elements outputting varying intensities or by varying the colour of light output of a light- emitting element.
  • Light-emitting elements exist the colour of which may be adapted. Other light-emitting elements output light of the same colour, so that only the intensity thereof may be varied.
  • the number of light-emitting elements may be adapted to the intensity desired. This is known to the skilled person who will be able to obtain any colour and intensity desired.
  • a direction of the light output may be adapted by controlling a reflector or by operating different light-emitting elements configured to, such as directed, in the desired direction.
  • different atmospheres may be created, such as one suitable for resting or reading or working or watching television, etc.
  • the assembly may further comprise an electronic unit which is in connection with the light source so as to control parameters of the first, second and/or third light-emitting elements and, therefore, the light emitted therefrom.
  • the electronic unit may be a microcontroller which controls parameters such as intensity, colour, directionality and/or brightness of the light emitted from the light-emitting elements.
  • the microcontroller may change the brightness of the light-emitting elements using a Pulse Width Modulated (PWM) signal fed to the light source.
  • PWM Pulse Width Modulated
  • the electronic unit may turn on one or more light-emitting elements, while turning off the rest.
  • the electronic unit may individually control each of the light-emitting elements if desired.
  • the assembly i.e. the electronic unit
  • a portable unit via e.g. WiFi communication, Bluetooth communication, Zwave communication or the like.
  • the portable unit may be a cell phone, tablet, iPod, laptop computer, purpose-built remote control or the like.
  • the portable unit may send information with preferred settings to the electronic unit, and based on that information the electronic unit will apply the settings to the light source.
  • the portable unit may be operated by a user who can apply predefined settings determining light intensity, colour, directionality, brightness, etc., to the assembly.
  • the first, second and third light-emitting elements define three light zones: a first, second and third. All three zones may be individually controlled by the electronic unit.
  • a number of predetermined settings may exist in the portable unit memory. These predetermined settings are easy to apply. For example, in one situation only the first light zone might be on, while the second and third light zones are off. In another example, only the second light zone may be on, while the first and third light zones are off. In yet another example, the third light zone may be on and the first and second light zones will be off. Also a combination of two zones turned on and one zone turned off may be a possibility. Lightning will be also different when, for example, only the first zone is on, the intensity of the light-emitting elements is at 80 % and the colour temperature is 3000 K. To mimic, for instance, day light atmosphere, all three zones may be turned on to a maximum intensity and a colour temperature may be about 6500 K. A typical atmosphere for resting would be with the up-zone turned on to 30 % of the intensity and the colour temperature of 3000 K.
  • Fig. 1 illustrates an assembly of a shade and a light source positioned inside the shade.
  • Fig. 2 illustrates an assembly of the shade and light source emitting light a) towards the shade b) downwardly through the lower opening of the shade c) upwardly through the upper opening of the shade.
  • Fig. 3 illustrates a cross-sectional view of one of the embodiments of the light source.
  • Fig. 4 illustrates a perspective view of one of the embodiments of the light source.
  • Fig. 1 illustrates an assembly 100 of a shade 101, hanging from e.g. a ceiling, and a light source 102 positioned inside the shade.
  • the shade 101 is light transmissive and has an upper opening 103 and a lower opening 104.
  • the light source may be attached to the shade via a plurality of wires/struts 107.
  • the source 102 can be connected to a lightbulb socket 105 ensuring electrical connection via an electrical cable 106.
  • the lightbulb socket 105 is a standard socket used in houses, enabling the light source 102 to be installed instead of traditional light bulbs. Additionally, the light source 102 is adaptable to a number of shades of different shape.
  • Fig. 2 illustrates an assembly of the shade and light source emitting light in different directions.
  • Fig. 2a illustrates how one or more light-emitting elements 201 emit light towards the shade 101, i.e. the third direction.
  • light-emitting elements 202 emit light downwardly, which may be the second direction, through the lower opening 104 of the shade.
  • Fig. 2c illustrates light emitted upwardly, which may be the first direction, through the upper opening 103 of the shade.
  • Fig. 3 illustrates a cross-sectional view of one of the embodiments of the light source 102.
  • the light source 102 comprises a first planar element, i.e. a printed circuit board (PCB) having a first surface 301 and a second planar element having a second surface 302, wherein the first and second planar elements are parallel and are opposed to each other.
  • the light source may comprise only one PCB having a top and bottom surface as a first and second surface.
  • a plurality of the first light-emitting elements 203 are fixed to the first surface 301 and a plurality of the second light-emitting elements 202 are fixed to the second surface 302.
  • the first surface 301 faces the upper opening of the shade (not shown in FIG.
  • the light source 102 further comprises a light reflecting element 303 configured to reflect light from the third light-emitting elements 201 toward the shade.
  • the light reflecting element 303 may be made from a heat dissipating metal.
  • the light source 102 may further comprise one or more light diffusers 304, 305, 306 configured to spread out light emitted from the first, second and third light-emitting elements.
  • the light source 102 may further comprise an electronic unit 307 configured to control the first, second and third light-emitting elements and light emitted therefrom.
  • the electronic unit may control parameters such as intensity, colour, directionality, brightness of light emitter from the light-emitting elements, etc.
  • the electronic unit 305 may turn on one or more light-emitting elements, while turning off the rest.
  • Fig. 4 illustrates a perspective view of the light source comprising a number of diffusers 304, 305, 306 arranged around the first, second and the third light-emitting elements fixed on the first and second surfaces 301 and 302 of the first and second PCB.
  • the light source is symmetrical having the electronic unit 307 and a central diffuser 305 along the axes of symmetry.
  • the light source 102 further comprises a top and bottom heat dissipating metal 402 and 403 arranged around the light-emitting elements. All the elements illustrated in Fig. 4 are attached to each other, forming a unity as one of the embodiments of the light source.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention relates to an assembly of a shade and a light source positioned inside the shade. The shade is light transmissive and has a first opening and a second opening. The light source comprises one or more first light-emitting elements configured to emit white light in a first direction and through the first opening of the shade; one or more second light-emitting elements configured to emit white light in a second direction and through the second opening; and one or more third light-emitting elements configured to emit light in a third direction and towards the shade.

Description

AN ASSEMBLY OF A SHADE AND A LIGHT SOURCE
FIELD OF THE INVENTION
The present invention relates to an assembly of a shade and a light source provided inside the shade. The assembly is configured to provide light in at least three different directions: a first, second and third direction.
BACKGROUND OF THE INVENTION
Intelligent or smart lamps may be seen in e.g. http : 7/q etf I uxo.com/. where a complete lamp is illustrated being able to selectively emit light upwardly and downwardly in different directions. OBJECT OF THE INVENTION
It is an object of embodiments of the invention to provide a lighting assembly comprising a shade with a light source positioned inside the shade, the assembly being capable of generating light in at least three directions, upwardly, downwardly and to the sides, toward the shade. SUMMARY OF THE INVENTION
In a first aspect, the present invention relates to an assembly of a shade and a light source positioned inside the shade, wherein:
the shade is light transmissive;
the light source has:
a. One or more first light-emitting elements configured to emit white light in first direction;
b One or more second light-emitting elements configured to emit white light in a second direction being opposite to the first direction;
c One or more third light-emitting elements configured to emit light of at least one colour in a third direction and toward the shade. The shade is a light transmissive element. In this context, the shade is preferably "light transmissive", when it transmits at least 10 % of the intensity of light of a predetermined wavelength emitted from the light source. This predetermined wavelength preferably is within the visible wavelength range of light, such as 390-700nm. It is preferred that the shade is configured to transmit at least 10% of the light emitted thereto of light in a wavelength interval with a width of at least lOnm, such as at least 50nm, such as at least lOOnm.
The shade may be a lampshade that can be mounted on a wall, desk, floor, etc. or hanging from e.g. a celling or the like. Often, the shade will comprise a light transmissive element such as paper, parchment, woven and breaded fabrics, silk, etc. and a supporting structure, such as metal struts or wires. The shade can have different shapes, such as pyramidal, conical, cylindrical, elliptical, spherical, parabolic, or the like.
The light source may be attached to the shade via a plurality of wires, struts or the like. Naturally, the light source can comprise a standard lightbulb socket or other electrical connection if desired. A standard lightbulb socket used in domestic appliances may be the E10, El l, E12, E14, E17, E26/27, E40 as well as pre-focus or bayonet socket types.
A light-emitting element is a device which is configured to emit light, usually by receiving an electrical signal. In the present context, the light-emitting element may emit light of a single predetermined wavelength, or it may emit light in an interval having a width of several nm. Preferred light-emitting elements are configured to emit white light or coloured light, such as red light, blue light, green light or the like. Naturally, light emitted from coloured light- emitting elements may be combined to generate white light or light of other colours if desired. In one embodiment, the first, second and third light-emitting elements may be light- emitting diodes (LEDs) of different colours and/or sizes. Other types of light-emitting elements are laser diodes, OLEDS or the like. Even though it is possible to direct light from a single light-emitting element into different directions, it is preferred that the first, second and third light-emitting elements are separate groups of light-emitting elements.
The first light-emitting elements may be selected to and/or configured to output white light of a desired intensity. The same applies to the second light-emitting elements. The third light-emitting elements may be selected to and/or configured to output light of a desired colour and/or intensity. Thus, if the light emitted in the third direction is only desired to be white or e.g. red, white or red light emitting elements may be used.. The first and second directions are opposite to each other. Naturally, light is usually emitted not along a single direction but within a beam or fan having a cone-shape or the like. The direction of a beam then may be a direction within this fan/cone, such as an axis of symmetry thereof if an axis of symmetry exists. Preferably, the third direction is at least substantially perpendicular to the first direction. Again, the light emitted in the third direction preferably will be within a fan/cone, or rather in a plane (i.e. as a disc) at least substantially perpendicular to the first direction. Again, perpendicular to this plane, the light emitted may fan out. The third direction is within this fan-shaped radiation. Preferably, the shade has a tubular outline having an axis of symmetry, such as an axis of rotational symmetry, along the first/second directions. When the light source is positioned within the shade, the third direction directs light toward the shade to illuminate the shade as a lamp normally is. Then, the fan-shape of the light from the third light-emitting elements may be adapted to the shade so that at least substantially all of the shade may be illuminated by the third light-emitting elements.
Preferably, in proximity of the light source, the light emitted from the first, second and third light-emitting elements do not overlap. Farther from the light emitter, the fan-shaped beams may overlap.
In a preferred embodiment, the shade has a first opening and a second opening. The first and second openings may be positioned at opposite sides or ends of the shade. The first and second openings may be of different sizes and shapes, such as circular, triangular, square, hexagonal, etc. In this embodiment, the one or more first light-emitting elements of the light source are configured to emit white light toward the first opening. Preferably, at least part of the light emitted from the first light-emitting elements passes through the first opening. Also, in this embodiment, the one or more second light-emitting elements are configured to emit white light toward the second opening. Preferably, at least part of the light emitted from the second light-emitting elements passes through the second opening. In this manner, an area above the shade may be illuminated not by the shade but through the first opening and an area below the shade may be illuminated not by the shade but through the second opening. In one embodiment of the invention, the light source comprises a planar printed circuit board (PCB) which physically supports the light-emitting elements. Preferably, the PCB has a first and second surface, preferably the main surfaces thereof, opposed to each other. The first light-emitting elements are fixed to the first surface, the second light-emitting elements are fixed to the second surface, and the third light-emitting elements are fixed to the first and/or second surface. The PCB may act to electrically connect to the light-emitting elements and/or to assist in dissipating heat from the light-emitting elements. Having the first and second surfaces facing two opposite directions implies that the light emitted from the first and second emitting elements may be emitted in the first and second directions, respectively. In another embodiment, the light source may comprise two or more separated PCBs carrying the light-emitting elements, where one PCB has the first surface and the light-emitting elements connected thereto and the other PCB has the other surface and the light-emitting elements connected thereto. Under all circumstances, the PCB(s) may be connected to a power supply of any desired type (battery, solar cell, mains or the like). In yet another embodiment of the present invention, the light source comprises one or more light-reflecting elements. In the present context, a light-reflecting element is an optical device which is configured to reflect light directed to it from one direction to another direction. In one embodiment, light-reflecting elements are configured to reflect the light emitted from the third light-emitting elements into the third direction. The reflecting element may be a transmissive element, such as an optical lens, or a diffractive/reflective element, such as a mirror, which may be e.g. an aluminium reflector or any other kind of reflective surface. The light-reflecting element may be made from a heat dissipating metal dissipating the heat generated by the third light-emitting elements. Alternatively, a heat sink, i.e. heat dissipating element, may be included adjacent to the reflecting element or the light-emitting elements. The light source may also comprise heat dissipating elements, for dissipating heat generated by the first and second light-emitting elements.
The light source may further comprise one or more light diffusers. In the present context the light diffuser is an element which diffuses light. A diffuser can be any translucent element, typically made of different types of glass, plastic, teflon, etc. The desired operation of a light diffuser is to have the brightness of light scattered from a diffuser appear to be the same from any angle of view. The diffuser(s) may have a wide range of shapes and sizes. The shape and size of the diffusers may at least partly determine an angle of the light emitted by the source. The light diffusers may diffuse the light emitted from the first, second and/or third light-emitting elements. According to one embodiment, the diffuser(s) is/are arranged around the light-emitting elements. Preferably, one light diffuser is providing for diffusing the light emitted from the first light-emitting elements, another light diffuser is provided for diffusing the light emitted from the second light-emitting elements, and yet another one is provided for diffusing the light emitted from the third light-emitting elements.
The first and/or second light-emitting elements may be configured to output light within a controllable brightness and/or light intensity while the third light-emitting elements may be configured to output light with a controllable colour, brightness and/or light intensity. In general, a controllable colour may be obtained from differently coloured light-emitting elements outputting varying intensities or by varying the colour of light output of a light- emitting element. Light-emitting elements exist the colour of which may be adapted. Other light-emitting elements output light of the same colour, so that only the intensity thereof may be varied. Naturally, instead of varying the intensity of light emitted from a light- emitting element, the number of light-emitting elements may be adapted to the intensity desired. This is known to the skilled person who will be able to obtain any colour and intensity desired.
In the same manner, a direction of the light output may be adapted by controlling a reflector or by operating different light-emitting elements configured to, such as directed, in the desired direction. By altering the direction, different atmospheres may be created, such as one suitable for resting or reading or working or watching television, etc.
The assembly may further comprise an electronic unit which is in connection with the light source so as to control parameters of the first, second and/or third light-emitting elements and, therefore, the light emitted therefrom. The electronic unit may be a microcontroller which controls parameters such as intensity, colour, directionality and/or brightness of the light emitted from the light-emitting elements. For example, the microcontroller may change the brightness of the light-emitting elements using a Pulse Width Modulated (PWM) signal fed to the light source. The electronic unit may turn on one or more light-emitting elements, while turning off the rest. Furthermore, the electronic unit may individually control each of the light-emitting elements if desired.
It is preferred that the assembly, i.e. the electronic unit, is wirelessly connected to a portable unit via e.g. WiFi communication, Bluetooth communication, Zwave communication or the like. The portable unit may be a cell phone, tablet, iPod, laptop computer, purpose-built remote control or the like. In the present context, the portable unit may send information with preferred settings to the electronic unit, and based on that information the electronic unit will apply the settings to the light source. The portable unit may be operated by a user who can apply predefined settings determining light intensity, colour, directionality, brightness, etc., to the assembly. In a preferred embodiment, the first, second and third light-emitting elements define three light zones: a first, second and third. All three zones may be individually controlled by the electronic unit. A number of predetermined settings may exist in the portable unit memory. These predetermined settings are easy to apply. For example, in one situation only the first light zone might be on, while the second and third light zones are off. In another example, only the second light zone may be on, while the first and third light zones are off. In yet another example, the third light zone may be on and the first and second light zones will be off. Also a combination of two zones turned on and one zone turned off may be a possibility. Lightning will be also different when, for example, only the first zone is on, the intensity of the light-emitting elements is at 80 % and the colour temperature is 3000 K. To mimic, for instance, day light atmosphere, all three zones may be turned on to a maximum intensity and a colour temperature may be about 6500 K. A typical atmosphere for resting would be with the up-zone turned on to 30 % of the intensity and the colour temperature of 3000 K.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention will now be described in further details with reference to the accompanying drawings, in which:
Fig. 1 illustrates an assembly of a shade and a light source positioned inside the shade.
Fig. 2 illustrates an assembly of the shade and light source emitting light a) towards the shade b) downwardly through the lower opening of the shade c) upwardly through the upper opening of the shade. Fig. 3 illustrates a cross-sectional view of one of the embodiments of the light source.
Fig. 4 illustrates a perspective view of one of the embodiments of the light source.
While the invention is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. It should be understood, however, that the following description relates to examples of embodiments, and the invention is not intended to be limited to the particular forms disclosed. Rather, the invention covers all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
DETAILED DISCLOSURE OF THE INVENTION
Fig. 1 illustrates an assembly 100 of a shade 101, hanging from e.g. a ceiling, and a light source 102 positioned inside the shade. The shade 101 is light transmissive and has an upper opening 103 and a lower opening 104. The light source may be attached to the shade via a plurality of wires/struts 107. The source 102 can be connected to a lightbulb socket 105 ensuring electrical connection via an electrical cable 106. The lightbulb socket 105 is a standard socket used in houses, enabling the light source 102 to be installed instead of traditional light bulbs. Additionally, the light source 102 is adaptable to a number of shades of different shape.
Fig. 2 illustrates an assembly of the shade and light source emitting light in different directions. Fig. 2a illustrates how one or more light-emitting elements 201 emit light towards the shade 101, i.e. the third direction. In Fig. 2b, light-emitting elements 202 emit light downwardly, which may be the second direction, through the lower opening 104 of the shade. Fig. 2c illustrates light emitted upwardly, which may be the first direction, through the upper opening 103 of the shade.
Fig. 3 illustrates a cross-sectional view of one of the embodiments of the light source 102. The light source 102 comprises a first planar element, i.e. a printed circuit board (PCB) having a first surface 301 and a second planar element having a second surface 302, wherein the first and second planar elements are parallel and are opposed to each other. In another embodiment the light source may comprise only one PCB having a top and bottom surface as a first and second surface. A plurality of the first light-emitting elements 203 are fixed to the first surface 301 and a plurality of the second light-emitting elements 202 are fixed to the second surface 302. The first surface 301 faces the upper opening of the shade (not shown in FIG. 3) and the second surface 302 faces the lower opening. In the embodiment illustrated in Fig. 3, the third light-emitting elements 201 are fixed to the first surface 301. In another embodiment, the third light-emitting elements may be fixed to the second surface, or even to both surfaces. The light source 102 further comprises a light reflecting element 303 configured to reflect light from the third light-emitting elements 201 toward the shade. The light reflecting element 303 may be made from a heat dissipating metal. The light source 102 may further comprise one or more light diffusers 304, 305, 306 configured to spread out light emitted from the first, second and third light-emitting elements. The light source 102 may further comprise an electronic unit 307 configured to control the first, second and third light-emitting elements and light emitted therefrom. The electronic unit may control parameters such as intensity, colour, directionality, brightness of light emitter from the light-emitting elements, etc. The electronic unit 305 may turn on one or more light-emitting elements, while turning off the rest. Fig. 4 illustrates a perspective view of the light source comprising a number of diffusers 304, 305, 306 arranged around the first, second and the third light-emitting elements fixed on the first and second surfaces 301 and 302 of the first and second PCB. As appears from the figure, in one embodiment the light source is symmetrical having the electronic unit 307 and a central diffuser 305 along the axes of symmetry. The light source 102 further comprises a top and bottom heat dissipating metal 402 and 403 arranged around the light-emitting elements. All the elements illustrated in Fig. 4 are attached to each other, forming a unity as one of the embodiments of the light source.

Claims

1. An assembly of a shade and a light source positioned inside the shade, wherein:
the shade is light transmissive;
the light source has:
a. One or more first light-emitting elements configured to emit white light in a first direction;
b. One or more second light-emitting elements configured to emit white light in a second direction being opposite to the first direction;
c. One or more third light-emitting elements configured to emit light of at least one colour in a third direction and toward the shade.
2. An assembly according to claim 1, wherein:
the shade has a first opening and a second opening;
the one or more first light-emitting elements are configured to emit white light through the first opening; and
- the one or more second light-emitting elements are configured to emit white light through the second opening.
3. An assembly according to claims 1 or 2, wherein the light source comprises a planar printed circuit board (PCB) with a first and a second opposed surface, the first light-emitting elements being fixed to the first surface, the second light-emitting elements being fixed to the second surface, the third light-emitting elements being fixed to the first or second surface.
4. An assembly according to claim 2 and 3, wherein the first surface faces the first opening and the second surface faces the second opening of the shade.
5. An assembly according to any of the preceding claims, wherein the light source comprises one or more light-reflecting elements configured to reflect light from the third light-emitting elements in the third direction.
6. An assembly according to any of the preceding claims, wherein the light source comprises one or more light diffusers configured to diffuse light emitted from the first, second and/or third light-emitting elements.
7. An assembly according to any of the preceding claims, wherein the first and/or second light-emitting elements are configured to output white light with a controllable brightness, and/or light intensity and wherein the third light-emitting elements are configured to output light with a controllable colour, brightness, and/or light intensity.
8. An assembly according to claim 7, further comprising an electronic unit configured to control parameters of the light emitted from the first, second and/or third light-emitting elements.
9. An assembly according to claim 8, wherein the electronic unit is remotely controllable by a portable unit via WiFi communication.
10. An assembly according claim 9, wherein the portable unit is configured to apply a predefined setting determining light intensity, colour, directionality and/or brightness of the light source.
PCT/EP2017/051276 2016-01-27 2017-01-23 An assembly of a shade and a light source WO2017129506A1 (en)

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CN112097155A (en) * 2020-08-31 2020-12-18 扬州吉山津田光电科技有限公司 Blue-light-proof intelligent desk lamp and intelligent control method thereof
WO2022076201A1 (en) * 2020-10-05 2022-04-14 Florida Atlantic University Board Of Trustees Apparatus and method for uv-c mask sanitization
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