WO2022073832A1 - Source de lumière pour un rendu de tlci optimisé destinée à l'éclairage - Google Patents

Source de lumière pour un rendu de tlci optimisé destinée à l'éclairage Download PDF

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Publication number
WO2022073832A1
WO2022073832A1 PCT/EP2021/076889 EP2021076889W WO2022073832A1 WO 2022073832 A1 WO2022073832 A1 WO 2022073832A1 EP 2021076889 W EP2021076889 W EP 2021076889W WO 2022073832 A1 WO2022073832 A1 WO 2022073832A1
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WIPO (PCT)
Prior art keywords
light
light generating
range
generating device
devices
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PCT/EP2021/076889
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English (en)
Inventor
Julien Pierre Raymond CHAUVIER
Josselin Daniel LAVERGNE
René Theodorus WEGH
Martinus Petrus Joseph PEETERS
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Signify Holding B.V.
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Publication of WO2022073832A1 publication Critical patent/WO2022073832A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light

Definitions

  • the invention relates to a lighting system and to a light generating device comprising such lighting system.
  • the invention further relates to the use of such lighting system or such light generating device.
  • Light sources generating light with a TLCI (Television Lighting Consistency Index) value of at least 95 are known in the art.
  • US2020/0113022 describes a LED light fixture comprising a plurality of LEDs mounted on a substrate, wherein the plurality of LEDs include a lime/mint light source accounting for at least 25% of the total lumen output, and a deep red light source accounting for at least 0.5% of total lumen output.
  • the lime/mint light source preferably accounts for at least 50% of the total lumen output.
  • the deep red light source preferably accounts for at least 1.0% of the total lumen output.
  • the light fixture can also include other colors, such as 1% to 50% cyan, 1% to 20% red/red-orange, and 1% to 10% blue/indigo.
  • the fixture further includes a processor for calculating a color mix and driving the LEDs.
  • the processor is programmed to produce a color mix having a CCT in the range of 2700-6500K, a TM-30 (Rf) of at least 90, and a TLCI of at least 95.
  • US2018/043130A discloses a system for controlling environmental illumination relative to circadian function of individuals by controlling the operation of light sources by assigning a circadian state to the individual based on received electronic information, extrapolating future circadian states based on the assigned circadian state, the assigned circadian state or the extrapolated future circadian states including at least a biological night state, and encoding machine-level control commands that control the operation of the light source for transmission to the light sources adapted for the biological night state by having circadian-significant attenuation along the circadian active wavelength range.
  • TLCI Television Lighting Consistency Index
  • TLCI values may be needed, e.g. for lighting of indoor or outdoor sport areas. It appears that standard LEDs that are commercially available do not comply with the conditions for such type of lighting, which may imply a high TLCI, a high CRI, and a high R9. It also appeared that it was not easy, if not impossible, to provide such solution, as it appeared that when optimizing one parameter, another parameter was deteriorating. For instance, combining a high CCT and high CRI system with a red (LED) light source to increase Ra appeared to lead to an increase of Ra, but a decrease of TLCI and/or CCT. Further, it appears that in such embodiments the stability of the color point during was less constant than desired.
  • the present invention may have as object to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
  • TLCI, CRI, R9 to increase all values (TLCI, CRI, R9), it is proposed to use a warmer LED than the initial CCT target and add blue. Adding blue light will increase the CCT. Surprisingly, the TLCI, R9 and CRI increases at the same time.
  • a blue LED is used to provide light having e.g. a CRI and a TLCI of at least 95 and a R9 value of at least 90.
  • the invention provides light generating system comprising a first light generating device and a second light generating device.
  • the first light generating device may be configured to generate white first device light having a first device light correlated color temperature Tl.
  • the second light generating device may be configured to generate blue second device light having a dominant wavelength selected from the range of 450-485 nm.
  • the light generating system may be configured to generate white system light comprising the first device light and the second device light, wherein the system light has a system light correlated color temperature Ts and a luminous flux.
  • 300 K ⁇ Ts-Tl ⁇ 1500 K.
  • a light generating system comprising a first light generating device and a second light generating device, wherein in an operational mode: (a) the first light generating device is configured to generate white first device light having a first device light correlated color temperature Tl, wherein the correlated color temperature (CCT) of the white first device light (111) is within 15 standard deviation of color matching (SDCM) from the black body locus (BBL); (b) the second light generating device is configured to generate blue second device light having a dominant wavelength selected from the range of 450-485 nm; and (c) the light generating system is configured to generate white system light comprising the first device light and the second device light, wherein the system light has a system light correlated color temperature Ts and a luminous flux, wherein 300 K ⁇ Ts-Tl ⁇ 1500 K, wherein 0.5-5% of the luminous
  • the invention also provides a light generating device comprising the light generating system as defined herein.
  • the generating device may be selected from the group of a lamp, a luminaire, a projector device, a disinfection device, and an optical wireless communication device, etc.
  • the system light may have a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 95, such as even more especially selected from the range of at least 97.
  • the system light may have a television lighting consistency index as defined in TLCI 2012 selected from the range of 95-98.
  • the system light may have an R9 value of at least 90.
  • the system light has a color rendering index of at least 90. The system light may especially be useful for lighting of an indoor sport area or an outdoor sport area.
  • the invention also provides the use of the light generating system as defined herein, or of the light generating device as defined herein, for illuminating an indoor or outdoor sport area.
  • the system light may be used for illumination of an outdoor arena, a stadium, a racing tracks, etc.
  • the system light may be used for illumination of an outdoor (or indoor) area) for cricket, football, rugby, tennis, hockey, golf, horse racing, car racing (like e.g. Fl racing), athletics, etc.
  • the system light may be used for illumination of an indoor sports arena or of a (sport) hall.
  • the system light may be used for illumination of an indoor area like a swimming pool, a velodrome, an indoor basketball area, an indoor ice hockey area, an indoor ice-skating area, etc.).
  • the system light may also be used for other sports facilities and arenas.
  • the light generating system comprises a first light generating device and a second light generating device.
  • first light generating device may in embodiments also refer to a plurality of (different) light generating devices. Further, as indicated above, in an operational mode the first light generating device is configured to generate white first device light having a first device light correlated color temperature Tl. It may be that the first light generating device has a controllable spectral power distribution of the device light. Hence, in the operational mode, the first light generating device is configured to generate white first device light having a first device light correlated color temperature Tl, whereas in other operational modes the first device light may have other characteristics. In yet further specific embodiments, the spectral power distribution of the first device light may not be controllable. In such embodiments, the first light generating device is configured to generate white first device light having a first device light correlated color temperature Tl (as such).
  • second light generating device may in embodiments also refer to a plurality of different light generating devices. Further, as indicated above, in an operational mode the second light generating device is configured to generate blue second device light having a dominant wavelength selected from the range of 450-485 nm. Especially, in embodiments the blue second device light may have a dominant wavelength selected from the range of 450-484 nm, such as 452-484 nm, like especially 460-484 nm. It may be that the second light generating device has a controllable spectral power distribution of the device light.
  • the second light generating device may be configured to generate the blue second device light having a dominant wavelength selected from the range of 450-485 nm, whereas in other operational modes the second device light may have other characteristics.
  • the spectral power distribution of the second device light may not be controllable.
  • the second light generating device may be configured to generate the blue second device light having a dominant wavelength selected from the range of 450-485 nm (as such).
  • the first light generating device and the second light generating device may be selected such that the system light, comprising the first device light and the second device light, has a CCT of at least 300 K higher, such as up to 1500 K higher than the first device light. This may be achieved by a contribution of only about 0.5-5% to the luminous flux. Further, as indicated above, in this way system light with good CRI, R9, and TLCI may be obtained.
  • the light generating system may be configured to generate white system light comprising the first device light and the second device light, wherein the system light has a system light correlated color temperature Ts and a luminous flux, wherein especially 300 K ⁇ Ts-Tl ⁇ 1500 K, and wherein in embodiments 0.5-5% of the luminous flux of the system light may be provided by the second light generating device.
  • Ts system light correlated color temperature
  • a luminous flux wherein especially 300 K ⁇ Ts-Tl ⁇ 1500 K
  • 0.5-5% of the luminous flux of the system light may be provided by the second light generating device.
  • in the range of 1-4% of the total luminous flux is provided by the second device light.
  • the system light has a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 92. Therefore, the first light generating device and the second light generating device may be selected to provide (in the operational mode) the system light having a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 92.
  • the system light may have a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 95, such as selected from the range of 95-98. Therefore, the first light generating device and the second light generating device may be selected to provide (in the operational mode) the system light having a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 95, such as selected from the range of 95-98.
  • the system light may have an R9 value of at least 90 and/or the system light may have a color rendering index of at least 90. Therefore, the first light generating device and the second light generating device may be selected to provide (in the operational mode) the system light having an R9 value of at least 90 and/or having a color rendering index of at least 90. Especially, in embodiments both conditions may apply.
  • the first device light may have (in the operational mode) an R9 value selected from the range of smaller than 90, and at least 50, even more especially at least 65. Especially then, the high CRI, R9, and TLCI values may be obtained (at the desired CCT). When R9 is larger than 90, or smaller than 65, especially smaller than 50, one or more of CRI, R9, CCT and TLCI values may not be as desired. Especially, in embodiments the first device light may have (in the operational mode) an R9 value selected from the range of 65-85.
  • the CCT of the first device light is lower than the final CCT of the system light with a value selected from the range of 300-1500 K.
  • 300 K ⁇ Ts-Tl ⁇ 1400 K such as 300 K ⁇ Ts-Tl ⁇ 1300 K.
  • 500 K ⁇ Ts-Tl ⁇ 1200 K may be obtained.
  • system light appears to be system light with a correlated color temperature Ts selected from the range of 5400-6800 K.
  • system may especially be suitable for the herein indicated applications.
  • the system light correlated color temperature Ts of the system light is selected from the range of 5500- 6700 K. Therefore, the first light generating device and the second light generating device may be selected to provide (in the operational mode) the system light having with a correlated color temperature Ts selected from the range of 5400-6800 K, especially selected from the range of 5500-6700 K.
  • the first device light may have a first device light correlated color temperature T1 selected from the range of 4800-5900 K, even more especially selected from the range of 4900-5800 K.
  • the dominant wavelength of the second device light may be selected from the range of 465-477 nm (in the operational mode), especially selected from the range of 470- 474 nm.
  • the system may further comprise a control system.
  • the light generating system may further comprise a control system configured to control the first light generating device and the second light generating device, especially in dependence of one or more of an input signal of a user interface, a sensor signal (of a sensor), and a timer.
  • the term “timer” may also refer to a time scheme or time schedule.
  • first light generating device may refer to a plurality of first light generating devices.
  • first light generating device may refer to a plurality of the same first light generating devices, such as from the same bin.
  • second light generating device may refer to a plurality of second light generating devices.
  • second light generating device may refer to a plurality of the same second light generating devices, such as from the same bin. Therefore, especially in embodiments the light generating system may comprise (i) nl first light generating devices, wherein the first light generating devices comprise solid state light sources, and (ii) n2 second light generating devices.
  • nl >n2.
  • the first light generating devices and the second light generating devices are configured in a grid.
  • the grid may be a ID or 2D array, or in specific embodiments even a 3D array.
  • the grid may comprise a 2D array of the first light generating devices and the second light generating devices.
  • the second light generating devices may be evenly distributed over the grid.
  • the grid may define grid edge enclosing the first light generating devices and the second light generating devices, wherein in average the second light generating devices are configured closer to the second edge than the first light generating devices.
  • the second light generating device may be closer to the edge.
  • the term “grid” may especially refer to a 2D or 3D array.
  • the first light generating device and the second light generating device may each comprise a light source, respectively.
  • the term “light source” may in principle relate to any light source known in the art. It may be a conventional (tungsten) light bulb, a low pressure mercury lamp, a high pressure mercury lamp, a fluorescent lamp, a LED (light emissive diode). In a specific embodiment, the light source comprises a solid state LED light source (such as a LED or laser diode).
  • the term “light source” may also relate to a plurality of light sources, such as 2- 200 (solid state) LED light sources. Hence, the term LED may also refer to a plurality of LEDs. Further, the term “light source” may in embodiments also refer to a so-called chips- on-board (COB) light source.
  • COB chips- on-board
  • COB especially refers to LED chips in the form of a semiconductor chip that is neither encased nor connected but directly mounted onto a substrate, such as a PCB. Hence, a plurality of light semiconductor light source may be configured on the same substrate.
  • a COB is a multi LED chip configured together as a single lighting module.
  • the light source has a light escape surface.
  • a light escape surface Referring to conventional light sources such as light bulbs or fluorescent lamps, it may be outer surface of the glass or quartz envelope.
  • LED it may for instance be the LED die, or when a resin is applied to the LED die, the outer surface of the resin. In principle, it may also be the terminal end of a fiber.
  • escape surface especially relates to that part of the light source, where the light actually leaves or escapes from the light source.
  • the light source is configured to provide a beam of light. This beam of light (thus) escapes form the light exit surface of the light source.
  • the term “light source” may refer to a semiconductor light-emitting device, such as a light emitting diode (LEDs), a resonant cavity light emitting diode (RCLED), a vertical cavity laser diode (VCSELs), an edge emitting laser, etc...
  • the term “light source” may also refer to an organic light-emitting diode, such as a passive-matrix (PMOLED) or an active-matrix (AMOLED).
  • the light source comprises a solid-state light source (such as a LED or laser diode).
  • the light source comprises a LED (light emitting diode).
  • the term LED may also refer to a plurality of LEDs.
  • the term “light source” may in embodiments also refer to a so-called chips-on-board (COB) light source.
  • COB especially refers to LED chips in the form of a semiconductor chip that is neither encased nor connected but directly mounted onto a substrate, such as a PCB. Hence, a plurality of semiconductor light sources may be configured on the same substrate.
  • a COB is a multi LED chip configured together as a single lighting module.
  • the term “light source” may also relate to a plurality of (essentially identical (or different)) light sources, such as 2-2000 solid state light sources.
  • the light source may comprise one or more micro-optical elements (array of micro lenses) downstream of a single solid-state light source, such as a LED, or downstream of a plurality of solid-state light sources (i.e. e.g. shared by multiple LEDs).
  • the light source may comprise a LED with on-chip optics.
  • the light source comprises a pixelated single LEDs (with or without optics) (offering in embodiments on-chip beam steering).
  • the light source may be configured to provide primary radiation, which is used as such, such as e.g. a blue light source, like a blue LED, or a green light source, such as a green LED, and a red light source, such as a red LED.
  • the light source may be configured to provide primary radiation and part of the primary radiation is converted into secondary radiation. Secondary radiation may be based on conversion by a luminescent material. The secondary radiation may therefore also be indicated as luminescent material radiation.
  • the luminescent material may in embodiments be comprised by the light source, such as a LED with a luminescent material layer or dome comprising luminescent material.
  • the luminescent material may be configured at some distance (“remote”) from the light source, such as a LED with a luminescent material layer not in physical contact with a die of the LED.
  • the light source may be a light source that during operation emits at least light at wavelength selected from the range of 380-470 nm. However, other wavelengths may also be possible. This light may partially be used by the luminescent material.
  • the first light generating devices comprise solid state light sources.
  • the second light generating devices comprise solid state light sources.
  • the light generating devices may be configured in one or more LED strings. Therefore, in embodiments the light generating system may comprise one or more LED strings, wherein each LED string comprises nl first light generating devices and (ii) n2 second light generating devices. Especially, in embodiments n2/nl ⁇ 0.5.
  • the area between the curves as defined in Fig. 2c is herein also claimed, optionally including a margin of up to 10% on the luminous flux.
  • the light generating system may be part of or may be applied in e.g. office lighting systems, household application systems, shop lighting systems, home lighting systems, accent lighting systems, spot lighting systems, theater lighting systems, fiber-optics application systems, projection systems, self-lit display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, indicator sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, green house lighting systems, horticulture lighting, digital projection, or LCD backlighting.
  • the light generating system (or luminaire) may be part of or may be applied in e.g. optical communication systems or disinfection systems.
  • the invention also provides a lamp or a luminaire comprising the light generating system as defined herein.
  • the luminaire may further comprise a housing, optical elements, louvres, etc. etc...
  • the lamp or luminaire may further comprise a housing enclosing the light generating system.
  • the lamp or luminaire may comprise a light window in the housing or a housing opening, through which the system light may escape from the housing.
  • the invention also provides a projection device comprising the light generating system as defined herein.
  • a projection device or “projector” or “image projector” may be an optical device that projects an image (or moving images) onto a surface, such as e.g. a projection screen.
  • the projection device may include one or more light generating systems such as described herein.
  • the invention also provides a light generating device selected from the group of a lamp, a luminaire, a projector device, a disinfection device, and an optical wireless communication device, comprising the light generating system as defined herein.
  • the light generating device may comprise an indoor or outdoor stadium light generating device.
  • the light generating system or the light generating device may e.g. be used for illuminating an indoor or outdoor sport area.
  • white light herein, is known to the person skilled in the art. It especially relates to light having a correlated color temperature (CCT) between about 1800 K and 20000 K, such as between 2000 and 20000 K, especially 2700-20000 K, for general lighting especially in the range of about 2700 K and 6500 K.
  • CCT correlated color temperature
  • the correlated color temperature (CCT) may especially be in the range of about 7000 K and 20000 K.
  • the correlated color temperature (CCT) is especially within about 15 SDCM (standard deviation of color matching) from the BBL (black body locus), especially within about 10 SDCM from the BBL, even more especially within about 5 SDCM from the BBL.
  • UV visible light
  • visible emission and similar terms refer to light having one or more wavelengths in the range of about 380-780 nm.
  • UV may especially refer to a wavelength selected from the range of 200-380 nm.
  • light and radiation are herein interchangeably used, unless clear from the context that the term “light” only refers to visible light.
  • the terms “light” and “radiation” may thus refer to UV radiation, visible light, and IR radiation. In specific embodiments, especially for lighting applications, the terms “light” and “radiation” refer to (at least) visible light.
  • controlling and similar terms especially refer at least to determining the behavior or supervising the running of an element. Hence, herein “controlling” and similar terms may e.g. refer to imposing behavior to the element (determining the behavior or supervising the running of an element), etc., such as e.g. measuring, displaying, actuating, opening, shifting, changing temperature, etc..
  • controlling and similar terms may additionally include monitoring.
  • controlling and similar terms may include imposing behavior on an element and also imposing behavior on an element and monitoring the element.
  • the controlling of the element can be done with a control system, which may also be indicated as “controller”.
  • the control system and the element may thus at least temporarily, or permanently, functionally be coupled.
  • the element may comprise the control system.
  • the control system and element may not be physically coupled. Control can be done via wired and/or wireless control.
  • control system may also refer to a plurality of different control systems, which especially are functionally coupled, and of which e.g. one control system may be a master control system and one or more others may be slave control systems.
  • a control system may comprise or may be functionally coupled to a user interface.
  • the control system may also be configured to receive and execute instructions form a remote control.
  • the control system may be controlled via an App on a device, such as a portable device, like a Smartphone or I-phone, a tablet, etc..
  • the device is thus not necessarily coupled to the lighting system, but may be (temporarily) functionally coupled to the lighting system.
  • control system may (also) be configured to be controlled by an App on a remote device.
  • the control system of the lighting system may be a slave control system or control in a slave mode.
  • the lighting system may be identifiable with a code, especially a unique code for the respective lighting system.
  • the control system of the lighting system may be configured to be controlled by an external control system which has access to the lighting system on the basis of knowledge (input by a user interface of with an optical sensor (e.g. QR code reader) of the (unique) code.
  • the lighting system may also comprise means for communicating with other systems or devices, such as on the basis of Bluetooth, WIFI, LiFi, ZigBee, BLE or WiMAX, or another wireless technology.
  • the system, or apparatus, or device may execute an action in a “mode” or “operation mode” or “mode of operation”. Likewise, in a method an action or stage, or step may be executed in a “mode” or “operation mode” or “mode of operation” or “operational mode”.
  • mode may also be indicated as “controlling mode”. This does not exclude that the system, or apparatus, or device may also be adapted for providing another controlling mode, or a plurality of other controlling modes. Likewise, this may not exclude that before executing the mode and/or after executing the mode one or more other modes may be executed.
  • a control system may be available, that is adapted to provide at least the controlling mode.
  • the choice of such modes may especially be executed via a user interface, though other options, like executing a mode in dependence of a sensor signal or a (time) scheme, may also be possible.
  • the operation mode may in embodiments also refer to a system, or apparatus, or device, that can only operate in a single operation mode (i.e. “on”, without further tunability).
  • control system may control in dependence of one or more of an input signal of a user interface, a sensor signal (of a sensor), and a timer.
  • timer may refer to a clock and/or a predetermined time scheme.
  • Figs. 2a-2b show some spectral power distributions (W vs. X (nm)), and
  • Fig. 2c shows some results (with on the y-axis the percentage of the luminous flux of the system light that is provided by the second light generating device and on the x- axis the dominant wavelength of the second device light in nm);
  • FIG. 3 schematically depict some further aspects.
  • Fig. la schematically depicts an embodiment of a light generating system 1000 comprising a first light generating device 110 and a second light generating device 120.
  • the first light generating device 110 may be configured to generate white first device light 111 having a first device light correlated color temperature T1 (at least in an operational mode).
  • the second light generating device 120 may be configured to generate blue second device light 121 having a dominant wavelength selected from the range of 450-485 nm (at least in the operational mode).
  • the light generating system 1000 may be configured to generate white system light 1001 comprising the first device light 111 and the second device light 121 (at least in the operational mode). In the operational mode, the system light 1001 may have a system light correlated color temperature Ts and a luminous flux.
  • the system light 1001 in the operational mode, may have a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 92.
  • the system light 1001 in the operational mode, has a television lighting consistency index as defined in TLCI 2012 selected from the range of at least 95, such as selected from the range of 95-98. In embodiments, in the operational mode, the system light 1001 has an R9 value of at least 90, and wherein the system light 1001 has a color rendering index of at least 90.
  • the first device light 111 in the operational mode, has an R9 value selected from the range of smaller than 90, and at least 50, even more especially at least 65. In embodiments, in the operational mode, the first device light 111 has an R9 value selected from the range of 65-85.
  • the system light correlated color temperature Ts is selected from the range of 5400-6800 K. In embodiments, in the operational mode, the system light correlated color temperature Ts of the system light 1001 is selected from the range of 5500-6700 K.
  • the first device light correlated color temperature T1 is selected from the range of 4800-5900 K. In embodiments, in the operational mode, the first device light correlated color temperature T1 of the first device light I l l is selected from the range of 4900-5800 K.
  • the dominant wavelength of the second device light 121 is selected from the range of 465-477 nm. In embodiments, in the operational mode, the dominant wavelength of the second device light 121 is selected from the range of 470-474 nm.
  • the light generating system 1000 may further comprise a control system 300 configured to control the first light generating device 110 and the second light generating device 120 in dependence of one or more of an input signal of a user interface (see also Fig 3), a sensor signal of a sensor, and a timer.
  • a control system 300 configured to control the first light generating device 110 and the second light generating device 120 in dependence of one or more of an input signal of a user interface (see also Fig 3), a sensor signal of a sensor, and a timer.
  • the light generating system 1000 may comprising nl first light generating devices 110, and n2 second light generating devices 120.
  • the first light generating devices 110 and the second light generating devices 120 may be configured in a grid 150.
  • the first light generating devices 110 comprise solid state light sources.
  • the second light generating devices 100 comprise solid state light sources.
  • the second light generating devices 120 are evenly distributed over the grid 150.
  • the grid 150 may define grid edge 155 enclosing the first light generating devices 110 and the second light generating devices 120. Especially, in average the second light generating devices 120 may be configured closer to the second edge 155 than the first light generating devices 110.
  • the light generating system may comprise one or more LED strings 1100, wherein each LED string 1100 comprises nl first light generating devices 110 and ii n2 second light generating devices 120. Especially, n2/nl ⁇ 0.5. Note that nl and n2 may be different for each LED string 1100, but may also be identical in each LED string 1100.
  • Fig. 1c schematically depicts an embodiment of a light generating device 1200 comprising the light generating system 1000.
  • the light generating device 1200 comprises indoor or outdoor stadium light generating device.
  • Reference 2 refers to a luminaire comprising the light generating system 1000.
  • the light generating system 1000 or the light generating device 1200 may e.g. be used for illuminating an indoor or outdoor sport area. The area is indicated with reference 5.
  • Figs. 2a-2b show two examples of light generating devices 110,120 that may be used, with in Fig. 2a a white LED having a CCT of about 5000 K, a CRI of 93, and an R9 Of 74; and a blue LED peaking at 472 nm, and with Fig. 2b a white LED having a CCT of about 5700 K, a CRI of 94, and an R9 Of 77; and a blue LED peaking at 472 nm.
  • a plurality of examples was simulated wherein the wavelength of the blue LED was varied, showing that good results can be obtained when the dominant wavelength is in the range of about 450-485 nm, including at least 452 nm, 460 nm, 470 nm, 482 nm. It appears that below 450 nm no desirable system light can be provided and it can be concluded that over about 485 nm also no desirable system light can be provided.
  • Fig. 2c show some results, amongst others on the basis of these examples. On the y-axis the percentage of the luminous flux of the system light that is provided by the second light generating device is displayed and on the x-axis the dominant wavelength of the second device light in nm is displayed.
  • the area between the curves may especially be of relevance.
  • a minimum value for the percentage of the luminous flux of the system light that is provided by the second light generating device and a maximum value may be determined.
  • the luminous flux may be determined.
  • the values for 452 nm are 0.5% and 0.8%.
  • the lower value is 0.7% and the upper value is 1.6%.
  • For 482 nm the values are 3.3% and 3.5%, respectively.
  • the 10%, or 5%, margin is not yet included. For instance, referring to the 460 nm values of 0.7-1.6%, including the 10%, the range becomes 0.63%-1.76%; and for 482 nm, the range becomes 2.97-3.85 % (assuming 10% margins).
  • Fig. 3 schematically depicts an embodiment of a luminaire 2 comprising the light generating system 1000 as described above.
  • Reference 301 indicates a user interface which may be functionally coupled with the control system 300 comprised by or functionally coupled to the light generating system 1000.
  • Fig. 5 also schematically depicts an embodiment of lamp 1 comprising the light generating system 1000.
  • Reference 3 indicates a projector device or projector system, which may be used to project images, such as at a wall, which may also comprise the light generating system 1000.
  • the terms “substantially” or “essentially” herein, and similar terms, will be understood by the person skilled in the art.
  • the terms “substantially” or “essentially” may also include embodiments with “entirely”, “completely”, “all”, etc. Hence, in embodiments the adjective substantially or essentially may also be removed.
  • the term “substantially” or the term “essentially” may also relate to 90% or higher, such as 95% or higher, especially 99% or higher, even more especially 99.5% or higher, including 100%.
  • a phrase “item 1 and/or item 2” and similar phrases may relate to one or more of item 1 and item 2.
  • the term “comprising” may in an embodiment refer to "consisting of' but may in another embodiment also refer to "containing at least the defined species and optionally one or more other species”.
  • the invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer.
  • a device claim, or an apparatus claim, or a system claim enumerating several means, several of these means may be embodied by one and the same item of hardware.
  • the invention also provides a control system that may control the device, apparatus, or system, or that may execute the herein described method or process. Yet further, the invention also provides a computer program product, when running on a computer which is functionally coupled to or comprised by the device, apparatus, or system, controls one or more controllable elements of such device, apparatus, or system.
  • the invention further applies to a device, apparatus, or system comprising one or more of the characterizing features described in the description and/or shown in the attached drawings.
  • the invention further pertains to a method or process comprising one or more of the characterizing features described in the description and/or shown in the attached drawings.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne un système de génération de lumière (1000) comprenant un premier dispositif de génération de lumière (110) et un second dispositif de génération de lumière (120). Dans un mode opérationnel : le premier dispositif de génération de lumière (110) est configuré pour générer une lumière blanche de premier dispositif (111) ayant une première température de couleur T1 corrélée à la lumière de dispositif ; le second dispositif de génération de lumière (120) est configuré pour générer une lumière bleue de second dispositif (121) ayant une longueur d'onde dominante choisie dans la plage de 450 à 485 nm ; le système de génération de lumière (1000) est configuré pour générer une lumière blanche de système (1001) comprenant la lumière de premier dispositif (111) et la lumière de second dispositif (121), la lumière de système (1001) ayant une température de couleur Ts corrélée à la lumière de système et un flux lumineux, l'expression 300 K ≤ Ts-T1 ≤ 1500 K étant satisfaite, et 0,5 à 5 % du flux lumineux de la lumière de système (1001) étant fourni par le second dispositif de génération de lumière (120).
PCT/EP2021/076889 2020-10-08 2021-09-29 Source de lumière pour un rendu de tlci optimisé destinée à l'éclairage WO2022073832A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170111972A1 (en) * 2014-06-10 2017-04-20 Philips Lighting Holding B.V. Light emitting arrangement with adjustable emission spectrum
US20180043130A1 (en) 2015-03-09 2018-02-15 Circadian Zirclight Inc. Systems and methods for controlling environmental illumination
US20200113022A1 (en) 2018-10-04 2020-04-09 Electronic Theatre Controls, Inc. Light fixture with leds of multiple different wavelengths
US20200175247A1 (en) * 2017-07-09 2020-06-04 Ringo Ai, Inc. Electromagnetic emitters and detectors for electronic devices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170111972A1 (en) * 2014-06-10 2017-04-20 Philips Lighting Holding B.V. Light emitting arrangement with adjustable emission spectrum
US20180043130A1 (en) 2015-03-09 2018-02-15 Circadian Zirclight Inc. Systems and methods for controlling environmental illumination
US20200175247A1 (en) * 2017-07-09 2020-06-04 Ringo Ai, Inc. Electromagnetic emitters and detectors for electronic devices
US20200113022A1 (en) 2018-10-04 2020-04-09 Electronic Theatre Controls, Inc. Light fixture with leds of multiple different wavelengths

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