WO2012001564A1 - Appareil d'éclairage - Google Patents

Appareil d'éclairage Download PDF

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Publication number
WO2012001564A1
WO2012001564A1 PCT/IB2011/052559 IB2011052559W WO2012001564A1 WO 2012001564 A1 WO2012001564 A1 WO 2012001564A1 IB 2011052559 W IB2011052559 W IB 2011052559W WO 2012001564 A1 WO2012001564 A1 WO 2012001564A1
Authority
WO
WIPO (PCT)
Prior art keywords
luminescent material
light
light source
absorption band
guide plate
Prior art date
Application number
PCT/IB2011/052559
Other languages
English (en)
Inventor
Rifat Ata Mustafa Hikmet
Ties Van Bommel
Levinus Pieter Bakker
René Theodorus WEGH
Jan Cornelis Kriege
Johannes Franciscus Maria Cillessen
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2012001564A1 publication Critical patent/WO2012001564A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces

Definitions

  • the invention relates to an illumination apparatus, in particular window blinds comprising illumination components.
  • Window blinds are widely used all over the world for their light-blocking and decoration functions. There are two typical types of traditional blinds, horizontal and vertical. Normally, they are just hung behind the window, on the indoor-side, and the light passing through the blinds can be adjusted, through adjusting the rotation of the blind blades, from totally light -blocking to totally light-passing. Blinds also can be stacked to one side of the window area when they are unused.
  • illuminating window blinds can be used for illumination, decoration, atmosphere creation, space division, functional lighting, or signage, etc.
  • the illuminating window blinds comprise a plurality of light guide plates, and a plurality of light sources corresponding to the plurality of light guide plates.
  • a light guide plate with outcoupling structure or reflective pattern is configured to receive the light from the light source and then direct the received light out from the light guide plate.
  • the window blinds are not really transparent but rather translucent.
  • the light guide plate outcouples all colors equally and therefore it is not easy to produce colored designs when different colors are emitted from different positions.
  • the light guide plate coated with standard luminescent material such as perylene, cumarin, and rhodamine is configured to receive the light from the light source and then direct the received light out from the light guide plate.
  • the light guide plate coated with standard luminescent material can produce colored designs.
  • the window blinds are not transparent but colored. Therefore, the window blinds will allow rather poor visibility and have an unattractive appearance, for example, the window blinds may have a red appearance.
  • an illumination apparatus comprising a first light source configured to generate a first light
  • a light guide plate a second surface and/or a third surface opposite to the second surface of the light guide plate coated with a first luminescent material, wherein the emission wavelength of the first light source corresponds to the range of full width at half maximum of the absorption band of the first luminescent material;
  • the light guide plate is configured to receive the first light generated from the first light source through a first surface and convert the first light to a second light with the first luminescent material and direct the second light out from the second surface;
  • the peak position of the absorption band of the first luminescent material is not more than 420nm, and the peak position of the emission band of the first luminescent material is in the visible range.
  • the luminescent material 130 As the peak position of the absorption band of the luminescent material 130 is not more than 420nm, i.e. in the invisible range, when the light source 110 is switched off, the luminescent material 130 only absorbs ambient light in the range not exceeding 420nm, so that the illumination apparatus 100 has a transparent or slightly tinted appearance.
  • an illumination apparatus comprising a first light source configured to generate a first light; a light guide plate, a second surface and/or a third surface opposite to the second surface of the light guide plate coated with a first luminescent material, wherein the emission wavelength of the first light source corresponds to the range of full width at half maximum of the absorption band of the first luminescent material;
  • the light guide plate is configured to receive the first light generated from the first light source through a first surface and convert the first light to a second light with the first luminescent material and direct the second light out from the second surface;
  • the full width at half maximum of the absorption band of the first luminescent material is not more than lOnm, and the peak position of the emission band of the first luminescent material is in the visible range.
  • the luminescent material 130 only absorbs a small fraction of the ambient light so that the illumination apparatus 100 has a transparent or slightly tinted appearance.
  • an illuminating method comprising:
  • the emission wavelength of the first light source corresponds to the range of FWHM of the absorption band of the first luminescent material
  • the peak position of the absorption band of the first luminescent material is not more than 420nm or the full width at half maximum of the absorption band of the first luminescent material is not more than lOnm, and the peak position of the emission band of the first luminescent material is in the visible range.
  • Fig. 1 depicts a schematic diagram of the illumination apparatus 100 according to one embodiment
  • Fig. 2 depicts a schematic diagram of the manner in which the luminescent material 130 is coated on the third surface 123 of the light guide plate 120 according to one embodiment
  • Fig. 3 depicts a schematic diagram of the third surface 123 of the light guide plate 120 which is coated with two kinds of luminescent materials 130, 131 ;
  • Fig. 4 depicts a schematic diagram of the illumination apparatus 100 according to another embodiment
  • Fig. 5 depicts a flow chart of an illuminating method according to one embodiment.
  • the illumination apparatus 100 is a window blind, or an illuminating panel.
  • Fig. 1 depicts a schematic diagram of the illumination apparatus 100 according to one embodiment.
  • the illumination apparatus 100 comprises a first light source 110 and a light guide plate 120.
  • the third surface 123 of the light guide plate 120 is coated with a first luminescent material 130.
  • the luminescent material 130 may also be coated on the second surface 122 of the light guide plate 120, or on both the second surface 122 and the third surface 123 of the light guide plate 120.
  • the first light source 110 is configured to generate first light.
  • the first light source 110 can be many kinds of illuminating components, such as fluorescent lamps, light emitting diodes, halogen lamps, incandescent lamps or organic light-emitting materials, etc.
  • the emission wavelength of the first light source 110 corresponds to the range of the full width at half maximum (FWHM) of the absorption band of the first luminescent material 130. That is to say, the emission wavelength of the first light source 110 is within the range of FWHM of the absorption band of the first luminescent material 130.
  • the light guide plate 120 is configured to receive the first light generated by the first light source 110 through the first surface 121 of the light guide plate 120, and convert the first light to a second light with the first luminescent material 130 and direct the second light out from the second surface 122 of the light guide plate 120.
  • the light guide plate 120 is a light conductive plate, which can be made from a polymer such as polymethyl methacrylate (PMMA), polycarbonate (PC), polydimethylsiloxane (PDMS), or the like.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • PDMS polydimethylsiloxane
  • the shape of the light guide plate 120 can be cuboidal, trapezoidal and triangular, or other regular and irregular shapes.
  • the peak position of the absorption band of the first luminescent material 130 is not more than 420nm, and the peak position of the emission band of the first luminescent material 130 is in the visible range.
  • the peak position of the absorption band of the first luminescent material 130 is in the UV to violet part of the spectrum.
  • the first luminescent material 130 can be Lanthanide complexes, for example an Eu complex, Tb complex, or other metal complexes, for example an Al complex, Ir complex.
  • the first luminescent material 130 is an Eu complex, and correspondingly, the first light source 110 emits the first light which is in the UV to violet part of the spectrum.
  • the Eu complex coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light generated by the first light source 110 and converts the first light to the second light, i.e. red light, and then the red light is directed out from the second surface 122 of the light guide plate 120.
  • the first luminescent material 130 is a Tb complex, and correspondingly, the first light source 110 emits the first light which is in the UV to violet part of the spectrum.
  • the Tb complex coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. green light, and then the green light is directed out from the second surface 122 of the light guide plate 120.
  • the first luminescent material 130 is an Al complex, and correspondingly, the first light source 110 emits the first light, which is in the UV to violet part of the spectrum.
  • the Al complex coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. green light, and then the green light is directed out from the second surface 122 of the light guide plate 120.
  • the first luminescent material 130 is an Ir complex, and correspondingly, the first light source 110 emits the first light which is in the UV to violet part of the spectrum.
  • the Ir complex coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated from the first light source 110 and converts the first light to the second light, i.e. the red light, and then the red light is directed out from the second surface 122 of the light guide plate 120.
  • the first luminescent material 130 can also be achieved by doping a second luminescent dye, for example coumarin, in a low concentration, for example 2 mol into a first luminescent dye, for example polyvinyl carbazole, so that resonant energy transfer from the polyvinyl carbazole to the coumarin takes place and the first luminescent material 130 emits mainly green light.
  • a second luminescent dye for example coumarin
  • a first luminescent dye for example polyvinyl carbazole
  • the first luminescent material 130 of the present invention is not limited to those mentioned above. Any luminescent material with a large Stokes shift and with the peak position of the absorption band in the range of not more than 420nm falls into the scope of the present invention.
  • the peak position of the absorption band of the first luminescent material 130 is not more than 420nm, i.e. in the invisible range, when the first light source 110 is switched off, the first luminescent material 130 only absorbs the ambient light in the range of not more than 420nm, so that the illumination apparatus 100 has a transparent or slightly tinted appearance.
  • the FWHM of the absorption band of the first luminescent material 130 is not more than lOnm, and the peak position of the emission band of the first luminescent material 130 is in the visible range.
  • the first luminescent material 130 can be, for example, Zblan glass doped with a lanthanide complex.
  • the lanthanide complex can be, for example, an Er complex, Pr complex, Eu complex, Ho complex.
  • the first luminescent material 130 is Zblan glass doped with an Er complex, and correspondingly, the light source 110 emits the first light, which is in the UV to violet part of the spectrum.
  • the Er complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. green light, and then the green light is directed out from the second surface 122 of the light guide plate 120.
  • the luminescent material 130 is Zblan glass doped with a Pr complex, and correspondingly, the light source 110 emits the first light, which is in the UV to violet part of the spectrum.
  • the Pr complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. white light, and then the white light is directed out from the second surface 122 of the light guide plate 120.
  • the luminescent material 130 is Zblan glass doped with an Eu complex, and correspondingly, the light source 110 emits the first light, which is in the UV to violet part of the spectrum.
  • the Eu complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. red light, and then the red light is directed out from the second surface 122 of the light guide plate 120.
  • the luminescent material 130 is Zblan glass doped with a Ho complex, and correspondingly, the light source 110 emits the first light, which is in the UV to violet part of the spectrum.
  • the Ho complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the first light, i.e. UV to violet light, generated by the first light source 110 and converts the first light to the second light, i.e. green light, and then the green light is directed out from the second surface 122 of the light guide plate 120.
  • the FWHM of the absorption band of the first luminescent material 130 is not more than lOnm, when the first light source 110 is switched off, the first luminescent material 130 only absorbs a small fraction of the ambient light, so that the illumination apparatus 100 has a transparent or slightly tinted appearance.
  • the second light directed out from the second surface 122 of the light guide plate 120 changes gradually from bright to dark along the second surfacel22 in a direction away from the first light source 110.
  • the absorbance of the first luminescent material 130 coated on the third surface 123 of the light guide plate 120 increases along the third surface 123 of the light guide plate 120 in a direction away from the first light source 110.
  • the first luminescent material 130 is coated in a dotted pattern on the third surface 123 of the light guide plate 120, and the density of the luminescent dots increases along the third surface 123 of the light guide plate 120 in a direction away from the first light source 110.
  • the third surface 123 of the light guide plate 120 is coated with one kind of luminescent material, i.e. the first luminescent material 130; therefore, the illumination apparatus 100 of the aforementioned embodiments can only emit light of a single color.
  • the third surface 123 of the light guide plate 120 may be coated with more than one kind of luminescent material.
  • the third surface 123 of the light guide plate 120 coated with two kinds of luminescent materials is used as an example hereinbelow.
  • the third surface 123 of the light guide plate 120 is coated with two kinds of luminescent materials, i.e. the first luminescent material 130 and the second luminescent material 131.
  • the emission wavelength of the first light source 110 corresponds to the range of the full width at half maximum (FWHM) of the absorption band of the first luminescent material 130 and the second luminescent material 131. That is to say, the emission wavelength of the first light source 110 is within the range of FWHM of the absorption band of the first luminescent material 130 and within the range of FWHM of the absorption band of the second luminescent material 131.
  • the peak position of the absorption band of the first luminescent material 130 and of the second luminescent material 131 are not more than 420nm, and the peak position of the emission band of the first luminescent material 130 and of the second luminescent material 131 are in the visible range.
  • the first luminescent material 130 and the second luminescent material 131 can be Lanthanide complexes, for example an Eu complex, Tb complex, or other metal complexes, for example an Al complex, Ir complex.
  • the Eu complex and the Tb complex are used as examples of respectively the first luminescent material 130 and the second luminescent material 131.
  • the Eu complex coated on the third surface 123 of the light guide plate 120 absorbs the first part of the first light and converts it to the second light, i.e. red light.
  • the Tb complex coated on the third surface 123 of the light guide plate 120 absorbs the second part of the first light and converts it to the third light, i.e. green light. Then, the red light and the green light and the mixture thereof are respectively directed out from the second surface 122 of the light guide plate 120.
  • the FWHM of the absorption band of the first luminescent material 130 and the second luminescent material 131 are not more than
  • the peak position of the emission band of the first luminescent material 130 and of the second luminescent material 131 are in the visible range.
  • the first luminescent material 130 and the second luminescent material 131 can be, for example, Zblan glass doped with a lanthanide complex.
  • the lanthanide complex can be, for example, an Er complex, Pr complex, Eu complex, Ho complex.
  • the Zblan glass doped with an Er complex and the Zblan glass doped with an Eu complex are used as respectively examples of the first luminescent material 130 and the second luminescent material 131.
  • the Er complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the first part of the first light and converts it to the second light, i.e. green light.
  • the Eu complex-doped Zblan glass coated on the third surface 123 of the light guide plate 120 absorbs the second part of the first light and converts it to the third light, i.e. red light. Then, the green light and the red light and the mixture thereof are respectively directed out from the second surface 122 of the light guide plate 120.
  • Fig. 4 depicts a schematic diagram of the illumination apparatus 100 according to another embodiment.
  • the illumination apparatus 100 comprises a first light source 110, a second light source 111 and a light guide plate 120.
  • the first light source 110 has a different emission wavelength than the second light source 111.
  • the third surface 123 of the light guide plate 120 is coated with two kinds of luminescent materials, i.e. the first luminescent material 130 and the third luminescent material 132.
  • the emission wavelength of the first light source 110 corresponds to the range of FWHM of the absorption band of the first luminescent material 130
  • the emission wavelength of the second light source 111 corresponds to the range of FWHM of the absorption band of the third luminescent material 132. That is to say, the emission wavelength of the first light source 110 is within the range of FWHM of the absorption band of the first luminescent material 130
  • the emission wavelength of the second light source 111 is within the range of FWHM of the absorption band of the third luminescent material 132.
  • the peak position of the absorption band of the first luminescent material 130 and of the third luminescent material 132 are not more than 420nm, and the peak position of the emission band of the first luminescent material 130 and of the third luminescent material 132 are in the visible range.
  • the first luminescent material 130 and the third luminescent material 132 can be Lanthanide complexes, for example an Eu complex, Tb complex, or other metal complexes, for example an Al complex, Ir complex.
  • the FWHM of the absorption band of the first luminescent material 130 and of the third luminescent material 132 are not more than
  • the peak position of the emission band of the first luminescent material 130 and of the third luminescent material 132 are in the visible range.
  • the first luminescent material 130 and the third luminescent material 132 can be for example, Zblan glass doped with a lanthanide complex.
  • the lanthanide complex can be, for example, an Er complex, Pr complex, Eu complex, Ho complex.
  • the color of the illumination apparatus 100 can be controlled.
  • the first light generated by the first light source 110 is conducted into the light guide plate 120 through the first surface 121, and the first luminescent material 130 coated on the third surface 123 of the light guide plate 120 absorbs the first light and converts it to the second light. Then, the second light is directed out from the second surface 122 of the light guide plate 120.
  • the fourth light generated by the second light source 111 is conducted into the light guide plate 120 through the first surface 121, and the third luminescent material 132 coated on the third surface 123 of the light guide plate 120 absorbs the fourth light and converts it to the fifth light. Then, the fifth light is directed out from the second surface 122 of the light guide plate 120.
  • the first light generated by the first light source 110 and the fourth light generated by the second light source 111 are respectively conducted into the light guide plate 120 through the first surface 121.
  • the first luminescent material 130 coated on the third surface 123 of the light guide plate 120 absorbs the first light and converts it to the second light.
  • the third luminescent material 132 coated on the third surface 123 of the light guide plate 120 absorbs the fourth light and converts it to the fifth light. Then, the second light and the fifth light and the mixture thereof are directed out from the second surface 122 of the light guide plate 120.
  • Fig. 5 depicts a flow chart of an illuminating method according to one embodiment.
  • step 501 there is generated a first light by a first light source.
  • step 502 the first light generated by the light source is received through a first surface of a light guide plate.
  • the light guide plate is a light conductive plate, which can be made from a polymer such as polymethyl methacrylate (PMMA), polycarbonate (PC), polydimethylsiloxane (PDMS), or the like.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • PDMS polydimethylsiloxane
  • the first light is converted to a second light by a first luminescent material coated on a second surface and/or a third surface opposite to the second surface of the light guide plate.
  • the emission wavelength of the first light source corresponds to the range of the full width at half maximum of the absorption band of the first luminescent material.
  • step 504 the second light is directed out from the second surface.
  • the peak position of the absorption band of the first luminescent material is not more than 420nm, and the peak position of the emission band of the first luminescent material is in the visible range.
  • the first luminescent material can be Lanthanide complexes, for example an Eu complex, Tb complex, or other metal complexes, for example an Al complex, Ir complex.
  • the full width at half maximum (FWHM) of the absorption band of the first luminescent material is not more than lOnm, and the peak position of the emission band of the first luminescent material is in the visible range.
  • the first luminescent material can be, for example, Zblan glass doped with a lanthanide complex.
  • the lanthanide complex can be, for example, an Er complex, Pr complex, Eu complex, Ho complex.
  • the converting step of step 503 shown in Fig.5 further comprises: converting the first light to a third light by a second luminescent material coated on the second surface and/or the third surface of the light guide plate.
  • the emission wavelength of the first light source corresponds to the range of FWHM of the absorption band of the second luminescent material.
  • the peak position of the absorption band of the second luminescent material is not more than 420nm, and the peak position of the emission band of the second luminescent material is in the visible range.
  • the FWHM of the absorption band of the second luminescent material is not more than lOnm, and the peak position of the emission band of the second luminescent material is in the visible range.
  • the absorbance and/or density of the first luminescent material and second luminescent material increase along the second surface and/or the third surface of the light guide plate in a direction away from the first light source.
  • the illuminating method shown in Fig.5 further comprises: generating a fourth light by a second light source.
  • the converting step of step 503 shown in Fig.5 further comprises: converting the fourth light to a fifth light by a third luminescent material coated on the second surface and/or the third surface.
  • the emission wavelength of the second light source corresponds to the range of the full width at half maximum of the absorption band of the third luminescent material.
  • the peak position of the absorption band of the third luminescent material is not more than 420nm, and the peak position of the emission band of the third luminescent material is in the visible range.
  • the FWHM of the absorption band of the third luminescent material is not more than 1 Onm, and the peak position of the emission band of the third luminescent material is in the visible range.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention porte sur un appareil d'éclairage. L'appareil d'éclairage comprend une première source de lumière, configurée pour générer une première lumière ; une plaque de guidage de lumière ; une deuxième surface et/ou une troisième surface opposée à la deuxième surface de la plaque de guidage de lumière revêtue d'un premier matériau luminescent, la longueur d'onde d'émission de la première source de lumière correspondant à la plage de largeur totale à mi-hauteur de la bande d'absorption du premier matériau luminescent ; la plaque de guidage de lumière étant configurée pour recevoir la première lumière générée par la première source de lumière à travers une première surface et convertir la première lumière en une seconde lumière avec le premier matériau luminescent et diriger la seconde lumière à l'extérieur de la deuxième surface ; la position de pic de la bande d'absorption du premier matériau luminescent n'étant pas supérieure à 420nm, ou la largeur totale à mi-hauteur de la bande d'absorption du premier matériau luminescent n'étant pas supérieure à 10nm, et la position de pic de la bande d'émission du premier matériau luminescent étant dans la plage visible. De cette manière, l'appareil d'éclairage selon des modes de réalisation de la présente invention paraît transparent, et a des effets d'éclairage coloré perfectionnés.
PCT/IB2011/052559 2010-06-30 2011-06-14 Appareil d'éclairage WO2012001564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2010/074826 2010-06-30
CN2010074826 2010-06-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013150429A1 (fr) * 2012-04-05 2013-10-10 Koninklijke Philips N.V. Agencement optique pour éclairage ascendant et descendant
US9557016B2 (en) 2013-08-02 2017-01-31 Philips Lighting Holding B.V. Color rendering index tunable lamp and luminaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090034230A1 (en) * 2007-07-31 2009-02-05 Luminus Devices, Inc. Illumination assembly including wavelength converting material having spatially varying density
US20090080215A1 (en) * 2007-09-24 2009-03-26 Munisamy Anandan UV based color pixel backlight for liquid crystal display
US20090101930A1 (en) * 2007-10-17 2009-04-23 Intematix Corporation Light emitting device with phosphor wavelength conversion
JP2009295501A (ja) * 2008-06-06 2009-12-17 Sharp Corp 光源モジュール及びそれを備えた電子機器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090034230A1 (en) * 2007-07-31 2009-02-05 Luminus Devices, Inc. Illumination assembly including wavelength converting material having spatially varying density
US20090080215A1 (en) * 2007-09-24 2009-03-26 Munisamy Anandan UV based color pixel backlight for liquid crystal display
US20090101930A1 (en) * 2007-10-17 2009-04-23 Intematix Corporation Light emitting device with phosphor wavelength conversion
JP2009295501A (ja) * 2008-06-06 2009-12-17 Sharp Corp 光源モジュール及びそれを備えた電子機器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013150429A1 (fr) * 2012-04-05 2013-10-10 Koninklijke Philips N.V. Agencement optique pour éclairage ascendant et descendant
US9557016B2 (en) 2013-08-02 2017-01-31 Philips Lighting Holding B.V. Color rendering index tunable lamp and luminaire

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