EP3977820B1 - Réglage sans fil de couleur pour pilote à courant constant - Google Patents

Réglage sans fil de couleur pour pilote à courant constant Download PDF

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Publication number
EP3977820B1
EP3977820B1 EP20732087.0A EP20732087A EP3977820B1 EP 3977820 B1 EP3977820 B1 EP 3977820B1 EP 20732087 A EP20732087 A EP 20732087A EP 3977820 B1 EP3977820 B1 EP 3977820B1
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EP
European Patent Office
Prior art keywords
value
control unit
led array
color
leds
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EP20732087.0A
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German (de)
English (en)
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EP3977820A1 (fr
Inventor
Yifeng QIU
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Lumileds LLC
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Lumileds LLC
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Priority claimed from US16/513,493 external-priority patent/US10772169B1/en
Application filed by Lumileds LLC filed Critical Lumileds LLC
Publication of EP3977820A1 publication Critical patent/EP3977820A1/fr
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    • 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]
    • H05B45/30—Driver circuits
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission
    • 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 subject matter disclosed herein relates to color tuning of one or more light-emitting diodes (LEDs) or LED arrays that comprise a lamp operating substantially in the visible portion of the electromagnetic spectrum. More specifically, the disclosed subject matter relates to a technique to enable, for example, a wireless color-tuning device for a single-channel, constant-current driver for the LED arrays.
  • LEDs light-emitting diodes
  • LED arrays that comprise a lamp operating substantially in the visible portion of the electromagnetic spectrum. More specifically, the disclosed subject matter relates to a technique to enable, for example, a wireless color-tuning device for a single-channel, constant-current driver for the LED arrays.
  • LEDs Light-emitting diodes
  • SPD spectral power density
  • the SPD is the relative intensity for various wavelengths within the visible light spectrum.
  • CCT correlated color temperature
  • BBL black-body line
  • BBL black-body locus
  • a first technology for example as described in WO2017189571A1 , is based on white LEDs of two or more CCTs.
  • the second technology is based on a combination of Red/Green/Blue/Amber colors.
  • the first technology simply does not have a capability to tune LEDs in the D uv direction.
  • the color tuning capability is seldom offered as an available function.
  • the user is instead usually offered a color wheel based on either Red-Green-Blue (RGB) or Hue-Saturation-Lightness (HSL) models.
  • RGB Red-Green-Blue
  • HSL Hue-Saturation-Lightness
  • first, second, third, etc. may be used herein to describe various elements. However, these elements should not be limited by these terms. These terms may be used to distinguish one element from another. For example, a first element may be termed a second element and a second element may be termed a first element without departing from the scope of the disclosed subject matter. As used herein, the term “and/or” may include any and all combinations of one or more of the associated listed items.
  • Relative terms such as “below,” “above,” “upper,” “lower,” “horizontal,” or “vertical” may be used herein to describe a relationship of one element, zone, or region relative to another element, zone, or region as illustrated in the figures. A person of ordinary skill in the art will understand that these terms are intended to encompass different orientations of the device in addition to an orientation depicted in the figures. Further, whether the LEDs, LED arrays, electrical components and/or electronic components are housed on one, two, or more electronics boards, or in one or multiple physical locations may also depend on design constraints and/or a specific application.
  • LEDs Semiconductor-based light-emitting devices or optical power-emitting-devices, such as devices that emit ultraviolet (UV) or infrared (IR) optical power, are among the most efficient light sources currently available. These devices may include light-emitting diodes, resonant-cavity light emitting diodes, vertical-cavity laser diodes, edge-emitting lasers, or the like (simply referred to herein as LEDs). Due to their compact size and low power requirements, LEDs may be attractive candidates for many different applications. For example, they may be used as light sources (e.g., flash lights and camera flashes) for hand-held battery-powered devices, such as cameras and cellular phones.
  • LEDs light-emitting diodes
  • resonant-cavity light emitting diodes resonant-cavity light emitting diodes
  • vertical-cavity laser diodes vertical-cavity laser diodes
  • edge-emitting lasers or the like
  • CRI color-rendering index
  • D uv Another quantitative lamp metric is D uv .
  • the D uv is a metric defined in, for example, CIE 1960, to represent the distance of a color point to the BBL. It is a positive value if the color point is above the BBL and a negative value if the color point is below the BBL. Color points above the BBL appear greenish in color and those below the BBL appear pinkish in color.
  • the disclosed subject matter provides an apparatus to control both a color temperature (CCT and D uv ) as well as a brightness level of the lamp. As described herein, the color temperature is related to both CCT and D uv in color-tuning applications.
  • the forward voltage of direct color LEDs decreases with increasing dominant wavelength.
  • These LEDS can be driven with, for example, multichannel DC-to-DC converters.
  • Advanced phosphor-converted color LEDs targeting high efficacy and CRI, have been created providing for new possibilities for correlated color temperature (CCT) tuning applications.
  • CCT correlated color temperature
  • Some of the advanced color LEDs have desaturated color points and can be mixed to achieve white colors with 90+ CRI over a wide CCT range.
  • Other LEDs having 80+ CRI implementations, or even 70+ CRI implementations (or even lower CRI values) may also be used with the disclosed subject matter. These possibilities use LED circuits that realize, and increase or maximize, this potential.
  • the control circuits described herein are compatible with single-channel constant-current drivers to facilitate market adoption.
  • dimming an LED can be achieved by, for example, reducing the forward current transferred to the LED.
  • a control unit (described in detail with reference to FIG. 4 , below) or other type of multiplexer, switching apparatus, or similar apparatus known in the art, may rapidly switch selected ones of the LEDs between "on” and “off” states to achieve an appropriate level of dimming and color temperature for the selected lamp.
  • LED drive circuits are formed using either an analog-driver approach or a pulse-width modulation (PWM)-driver approach.
  • an analog driver approach all colors are driven simultaneously. Each LED is driven independently by providing a different current for each LED.
  • the analog driver results in a color shift and currently there is not a way to shift current three ways. Analog driving often results in certain colors of LEDs being driven into low current mode and other times, into very high current mode. Such a wide dynamic range imposes a challenge on sensing and control hardware.
  • each color is switched on, in sequence, at high speed.
  • Each color is driven with substantially the same current.
  • the mixed color is controlled by changing the duty cycle of each color. That is, one color can be driven for twice as long as another color to add into the mixed color. As human vision is unable to perceive very fast changing colors, the light appears to have one single color.
  • a first LED (of a first color) is driven periodically with a current for a predetermined amount of time
  • a second LED of a second color
  • a third LED (of a third color) is driven periodically with the current for a predetermined amount of time.
  • Each of the three predetermined amounts of time may be the same amount of time or different amounts of time.
  • the mixed color is therefore controlled by changing the duty cycle of each color. For example, if you have an RGB LED and desire a specific output, red may be driven for a portion of the cycle, green for a different portion of the cycle, and blue is driven for yet another portion of the cycle based on the perception of the human eye.
  • the current is supplied from a voltage-controlled current source.
  • FIG. 1 shows a portion of an International Commission on Illumination (CIE) color chart 100, including a black body line (BBL) 101 (also referred to as a Planckian locus) that forms a basis for understanding various embodiments of the subject matter disclosed herein.
  • the BBL 101 shows the chromaticity coordinates for blackbody radiators of varying temperatures. It is generally agreed that, in most illumination situations, light sources should have chromaticity coordinates that lie on or near the BBL 101.
  • Various mathematical procedures known in the art are used to determine the "closest" blackbody radiator. As noted above, this common lamp specification parameter is called the correlated color temperature (CCT).
  • CCT correlated color temperature
  • D uv value is an indication of the degree to which a lamp's chromaticity coordinate lies above the BBL 101 (a positive D uv value) or below the BBL 101 (a negative D uv value).
  • the portion of the color chart is shown to include a number of isothermal lines 117. Even though each of these lines is not on the BBL 101, any color point on the isothermal line 117 has a constant CCT. For example, a first isothermal line 117A has a CCT of 10,000 K, a second isothermal line 117B has a CCT of 5,000 K, a third isothermal line 117C has a CCT of 3,000 K, and a fourth isothermal line 117D has a CCT of 2,200 K.
  • the CIE color chart 100 also shows a number of ellipses that represent a Macadam Ellipse (MAE) 103, which is centered on the BBL 101 and extends one step 105, three steps 107, five steps 109, or seven steps 111 in distance from the BBL 101.
  • the MAE is based on psychometric studies and defines a region on the CIE chromaticity diagram that contains all colors which are indistinguishable, to a typical observer, from a color at the center of the ellipse.
  • each of the MAE steps 105 to 111 (one step to seven steps) are seen to a typical observer as being substantially the same color as a color at the center of a respective one of the MAEs 103.
  • a series of curves, 115A, 115B, 115C, and 115D represent substantially equal distances from the BBL 101 and are related to D uv values of, for example, +0.006, +0.003, 0, - 0.003 and - 0.006, respectively.
  • FIG. 2A shows a chromaticity diagram 200 with approximate chromaticity coordinates of colors for typical coordinate values (as noted on the x-y scale of the chromaticity diagram 200) for a red (R) LED at coordinate 205, a green (G) LED at coordinate 201, and a blue (B) LED at coordinate 203.
  • FIG. 2A shows an example of the chromaticity diagram 200 for defining the wavelength spectrum of a visible light source, in accordance with some embodiments.
  • the chromaticity diagram 200 of FIG. 2A is only one way of defining a wavelength spectrum of a visible light source; other suitable definitions are known in the art and can also be used with the various embodiments of the disclosed subject matter described herein.
  • a convenient way to specify a portion of the chromaticity diagram 200 is through a collection of equations in the x-y plane, where each equation has a locus of solutions that defines a line on the chromaticity diagram 200.
  • the lines may intersect to specify a particular area, as described below in more detail with reference to FIG. 2B .
  • the white light source can emit light that corresponds to light from a blackbody source operating at a given color temperature.
  • the chromaticity diagram 200 also shows the BBL 101 as described above with reference to FIG. 1 .
  • Each of the three LED coordinate locations 201, 203, 205 are the CCT coordinates for "fully-saturated" LEDs of the respective colors green, blue, and red. However, if a "white light" is created by combining certain proportions of the R, G, and B LEDs, the CRI of such a combination would be extremely low. Typically, in the environments described above, such as retail or hospitality settings, a CRI of about 90 or higher is desirable.
  • FIG. 2B shows a revised version of the chromaticity diagram 200 of FIG. 2A , with approximate chromaticity coordinates for desaturated R, G, and B LEDs in proximity to the BBL, the desaturated R, G, and B LEDs having a color-rendering index (CRI) of approximately 90+ and within a defined color temperature range, in accordance with various embodiments of the disclosed subject matter.
  • CRI color-rendering index
  • the chromaticity diagram 250 of FIG. 2B shows approximate chromaticity coordinates for desaturated (pastel) R, G, and B LEDs in proximity to the BBL 101. Coordinate values (as noted on the x-y scale of the chromaticity diagram 250) are shown for a desaturated red (R) LED at coordinate 255, a desaturated green (G) LED at coordinate 253, and a desaturated blue (B) LED at coordinate 251.
  • R red
  • G desaturated green
  • B desaturated blue
  • a color temperature range of the desaturated R, G, and B LEDs may be in a range from about 1800 K to about 2500 K.
  • the desaturated R, G, and B LEDs may be in a color temperature range of, for example, about 2700 K to about 6500 K. In still other embodiments, the desaturated R, G, and B LEDs may be in a color temperature range of about 1800 K to about 7500 K. In still other embodiments, the desaturated R, G, and B LEDs may be selected to be in a wide range of color temperatures.
  • the color rendering index (CRI) of a light source does not indicate the apparent color of the light source; that information is given by the correlated color temperature (CCT). The CRI is therefore a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with an ideal or natural-light source.
  • a triangle 257 formed between each of the coordinate values for the desaturated R, G, and B LEDs is also shown.
  • the desaturated R, G, and B LEDs are formed (e.g., by a mixture of phosphors and/or a mixture of materials to form the LEDs as is known in the art) to have coordinate values in proximity to the BBL 101. Consequently, the coordinate locations of the respective desaturated R, G, and B LEDs, and as outlined by the triangle 257, has a CRI have approximately 90 or greater and an approximate tunable color-temperature-range of, for example, about 2700 K to about 6500 K.
  • a correlated color temperature may be selected in the color-tuning application described herein such that all combinations of CCT selected all result in the lamp having a CRI of 90 or greater.
  • Each of the desaturated R, G, and B LEDs may comprise a single LED or an array (or group) of LEDs, with each LED within the array or group having a desaturated color the same as or similar to the other LEDs within the array or group.
  • a combination of the one or more desaturated R, G, and B LEDs comprises a lamp.
  • FIG. 2C shows a revised version of the chromaticity diagram 200 of FIG. 2A , with approximate chromaticity coordinates for desaturated R, G, and B LEDs in proximity to the BBL, the desaturated R, G, and B LEDs having a color-rendering index (CRI) of approximately 80+ and within a defined color temperature range that is broader than the desaturated R, G, and B LEDs of FIG. 2B , in accordance with various embodiments of the disclosed subject matter.
  • CRI color-rendering index
  • the chromaticity diagram 270 of FIG. 2C shows approximate chromaticity coordinates for desaturated R, G, and B LEDs that are arranged farther from the BBL 101 than the desaturated R, G, and B LEDs of FIG. 2B .
  • Coordinate values are shown for a desaturated red (R) LED at coordinate 275, a desaturated green (G) LED at coordinate 273, and a desaturated blue (B) LED at coordinate 271.
  • a color temperature range of the desaturated R, G, and B LEDs may be in a range from about 1800 K to about 2500 K.
  • the desaturated R, G, and B LEDs may be in a color temperature range of about 2700 K to about 6500 K. In still other embodiments, the desaturated R, G, and B LEDs may be in a color temperature range of about 1800 K to about 7500 K.
  • a triangle 277 formed between each of the coordinate values for the desaturated R, G, and B LEDs is also shown.
  • the desaturated R, G, and B LEDs are formed (e.g., by a mixture of phosphors and/or a mixture of materials to form the LEDs as is known in the art) to have coordinate values in proximity to the BBL 101. Consequently, the coordinate locations of the respective desaturated R, G, and B LEDs, and as outlined by the triangle 277, has a CRI have approximately 80 or greater and an approximate tunable color-temperature-range of, for example, about 1800 K to about 7500 K. Since the color temperature range is greater than the range shown in FIG.
  • the CRI is commensurately decreased to about 80 or greater.
  • the desaturated R, G, and B LEDs may be produced to have individual color temperatures anywhere within the chromaticity diagram. Therefore, the selection of a correlated color temperature (CCT) may be selected in the color-tuning application described herein such that all combinations of CCT selected all result in the lamp having a CRI of 80 or greater.
  • CCT correlated color temperature
  • Each of the desaturated R, G, and B LEDs may comprise a single LED or an array (or group) of LEDs, with each LED within the array or group having a desaturated color the same as or similar to the other LEDs within the array or group.
  • a combination of the one or more desaturated R, G, and B LEDs comprises a lamp.
  • FIG. 3 shows a color-tuning device 300 of the prior art requiring a hard-wired flux-control device 301 and a separate, hard-wired CCT-control device 303.
  • the flux-control device 301 is coupled to a single-channel driver circuit 305 and the CCT-control device is coupled to a combination LED-driving circuit/LED array 320.
  • the combination LED-driving circuit/LED array 320 may be a current-driver circuit, a PWM driver circuit, or a hybrid current-driver/PWM-driver circuit.
  • Each of the flux-control device 301, the CCT-control device 303, and the single-channel driver circuit 305 is located in a customer facility 310 and all devices generally must be installed with applicable national and local rules governing high-voltage circuits.
  • the combination LED-driving circuit/LED array 320 is generally located remotely (e.g., a few meters to dozens of meters or more) from the customer facility 310. Consequently, both the initial purchase price and the installation price may be significant.
  • control inputs are usually required, one for flux control (e.g., luminous flux or dimming) and the other for color tuning.
  • the control inputs can be realized by, for example, electrical-mechanical devices, such as linear or rotary sliders, DIP switches, or a standard 0 V to 10V dimmer. While the dimmer for flux control may already be present in existing installations, it may be difficult and costly to accommodate a second dimmer for CCT control in a retrofit scenario due to electrical wiring requirements including various types of code compliance issues.
  • the disclosed subject matter overcomes these limitations and expenses by eliminating all dimmers from an installation. As will be instantly recognizable to a person of ordinary skill in the art upon reading and understanding the disclosed subject matter described below, all physical control devices (e.g., dimmers) are eliminated.
  • FIG. 4 illustrates an embodiment of the invention and shows an example of a high-level schematic diagram of a wireless color-tuning device 400, including a control unit 421, a dimmer emulator 440, a wireless control-device 450, a wireless module 423, and an LED array 430.
  • the LED array 430 may comprise, for example, the desaturated LEDs of FIGS. 2B and 2C , in accordance with various embodiments of the disclosed subject matter.
  • the dimmer emulator 440 is described in detail with reference to FIG. 5 , below. However, in various embodiments, the dimmer emulator 440 can perform many operations consecutively. Such operations can include, for example, receiving and processing signals of at least one of CCT, D uv , and luminous flux. In some embodiments in which the dimmer emulator 440 performs multiple operations substantially concurrently, the dimmer emulator 440 may be instantiated multiple times to control various operations of the LED array 430. If the wireless color-tuning device 400 is configured only to control luminous flux, a person of ordinary skill in the art may consider the wireless color-tuning device 400 to be a wireless LED-control device.
  • each of the control unit 421, the dimmer emulator 440, the wireless module 423, and the LED array 430 may be contained within a light-engine enclosure 420.
  • one or more of the control unit 421, the dimmer emulator 440, the wireless module 423, and/or the LED array 430 may be physically located within the light-engine enclosure 420 and others of the control unit 421, the dimmer emulator 440, the wireless module 423, and/or the LED array 430 may be located outside of the light-engine enclosure 420 either nearby (e.g., within a few meters) or more remotely (e.g., dozens of meters) from each other.
  • all physical control-devices that are hard-wired e.g., dimmers
  • the wireless color-tuning device 400 includes a single-channel driver circuit (e.g., LED driver 410).
  • the LED driver 410 may be located within a customer installation-area. In some embodiments, the LED driver 410 may be located remotely from a customer installation-area (but generally still within a customer facility). In some embodiments, the LED driver 410 may be located within the light-engine enclosure 420 (e.g., a junction box or other type of electronics enclosure used for housing various types of electrical or electronic components).
  • dimming an LED can be achieved by, for example, reducing the forward current transferred to the LED.
  • the LED driver 410 sends a pre-determined amount of current to one, two, or all three colors of the LED array 430 to change an overall CCT and/or D uv level of the LED array 430.
  • a control unit (described below with reference to FIG. 5 ) rapidly switches selected ones of the LEDs or selected groups of colors in the LED array 430 between "on” and “off” states to achieve an appropriate level of dimming for the selected lamp in accordance with intensities desired as indicated by an end-user in setting a level of desired brightness on, for example, a flux-control device.
  • the LED driver 410 is coupled through an LED + signal line 411 and an LEDsignal line 413 provide power to the LED array 430, through the control unit 421.
  • the control unit 421 may be, for example, a microcontroller, a microprocessor, or other processing unit known in the art.
  • the control unit 421 may be, for example, a special-purpose processor, such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC).
  • FPGA field-programmable gate array
  • ASIC application specific integrated circuit
  • the control unit 421 is configured to control the LED array 430, which is coupled to the control unit 421.
  • the control unit 421 receives wireless-based signals from the wireless module 423 to control various operations and lighting modes of the LED array 430.
  • control operations may include, for example, a received signal to adjust luminous flux, CCT, and/or D uv distance from the BBL (for example, along an isothermal line of the received CCT - see FIG. 1 ).
  • the LED array 430 can be any type of multi-colored LED array including the desaturated-types of LEDs described above with reference to FIGS. 2B and 2C .
  • Signals received from the wireless module 423 are interpreted or translated by an algorithm within the control unit 421.
  • the interpretation or translation provides a determination how the received wireless-signals affect operations of the LED array 430.
  • the control unit 421 may relate a specific signal amplitude and signal type (e.g., a series and periodicity of the received signals) to a particular operation of the LED arrays 430.
  • the particular types of operations include CCT and D uv , and optionally also luminous flux.
  • the determination of how the received wireless-signals affect operations of the LED array 430 is made by comparing the received signal to a lookup table (LUT) stored, for example, within the control unit 421 to a particular CCT, D uv , and luminous flux setting of one or more groups of individual colors of LEDs within the LED array 430.
  • LUT lookup table
  • a translation mechanism of the control unit 421 includes both the algorithm embodiment and the LUT embodiment that may be used concurrently to translate various components of the received signal.
  • At least one of the LED driver 410 (see FIG. 4 ) and the control unit 421 may comprise or include a hybrid LED driving-circuit for CCT and D uv tuning, as well as for luminous-flus control.
  • the hybrid driving-circuit can include an LED driver to produce a stabilized LED-driver current.
  • the control unit 421 delivers the current to the appropriate ones of LEDs or color groups of LEDs within the LED array 430 based on the desired CCT and D uv tuning.
  • the hybrid driving-circuit within the control unit 421 may then be overlaid with PWM time-slicing directing current to at least two colors of the LED array 430.
  • the control unit 421 then stores these two algorithms or values in, for example, software in an internal memory or firmware (e.g., an EEPROM), or hardware (e.g., a Field Programmable Gate Array (FPGA)).
  • the internal memory can take a number of forms including, for example, electrically erasable programmable read-only memory (EEPROM), phase-change memory (PCM), flash memory, or various other types of non-volatile memory devices known in the art.

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Claims (13)

  1. Appareil de commande (400) pour régler la couleur d'un réseau de DEL multicolores (430), l'appareil comprenant:
    - un module sans fil (423) configuré pour recevoir un signal sans fil d'un dispositif de commande sans fil (450), le signal sans fil reçu comprenant au moins une valeur de température de couleur corrélée et une valeur de distance d'une température du réseau de DEL multicolores (430) par rapport à une ligne de corps noir;
    - une unité de commande (421) couplée au module sans fil (423) et configurée pour traduire les signaux reçus du module sans fil (423), l'unité de commande (421) étant en outre couplée au réseau de DEL multicolores (430) et à un pilote de DEL (410), l'unité de commande (421) étant configurée pour recevoir l'alimentation du réseau de DEL multicolores (430) du pilote de DEL (410), l'unité de commande (421) étant en outre configurée pour fournir l'alimentation au réseau de DEL multicolores (430) d'une manière basée sur les signaux traduits; et
    - un émulateur de gradateur (440) couplé à l'unité de commande (421) et configuré pour fournir un ou plusieurs signaux de commande au pilote de DEL (410) comme commandé par l'unité de commande (421) et en fonction des signaux traduits;
    caractérisé par le fait que l'émulateur de gradateur comprend :
    une source de courant (501) ;
    une référence à tension réglable (509) couplée à la source de courant (510 );
    un transistor (529) couplé à la référence de tension réglable (509); et
    un diviseur de tension résistif (R1, R2, R3) configuré pour avoir un rapport de diviseur de tension variable; dans lequel le diviseur de tension résistif comprend une première résistance (R1) couplée en série à une première extrémité d'une deuxième résistance (R2) et à une première extrémité d'une troisième résistance (R3), chacune de la deuxième résistance (R2) et de la troisième résistance (R3) étant couplée sur leur deuxième extrémité respective aux côtés opposés du transistor (529), comprenant en outre une ligne de signal (531) couplée à une grille du transistor (529), dans laquelle un fonctionnement du transistor (529) est commandé par l'application d'un signal de modulation de largeur d'impulsion à la ligne de signal (531) et dans laquelle le rapport variable du diviseur de tension est déterminé par un rapport cyclique du appliqué. signal de modulation de largeur d'impulsion
  2. L'appareil de commande selon la revendication précédente, dans lequel le appliqué signal de modulation de largeur d'impulsion est configuré pour provoquer une résistance effective de la troisième résistance (R3) pour varier entre une valeur de la troisième résistance (R3) et une valeur d'impédance qui est supérieure à la valeur de la troisième résistance (R3), fournissant ainsi le rapport variable de diviseur de tension.
  3. L'appareil de commande selon l'une des revendications précédentes, dans lequel le réseau de DEL multicolores (430) comprend au moins une DEL pour chacune d'au moins trois couleurs de lumière sélectionnées dans une partie visible du spectre.
  4. L'appareil de commande selon l'une des revendications précédentes, dans lequel l'unité de commande (421) comprend en outre un algorithme configuré pour corréler une valeur du signal reçu du module sans fil (423) avec une valeur correspondante d'au moins une valeur de valeurs comprenant la valeur de et la température de couleur corrélée valeur de distance.
  5. L'appareil de commande selon l'une des revendications précédentes, dans lequel l'unité de commande (421) comprend en outre une Look-up table pour corréler une valeur du signal reçu du module sans fil (423) avec une valeur correspondante d'au moins une valeur de valeurs comprenant la valeur de et la température de couleur corrélée valeur de distance.
  6. L'appareil de commande selon l'une des revendications précédentes, configuré pour régler la couleur d'un réseau de DEL multicolores (430) comprenant au moins une DEL rouge, au moins une DEL verte et au moins une DEL bleue.
  7. L'appareil de commande selon revendication précédente, configuré pour régler la couleur d'un réseau de DEL (430) comprenant des DEL multicolores désaturées.
  8. L'appareil de commande selon la revendication 6 ou 7, dans lequel l'unité de commande (421) est en outre configurée pour fournir un signal de modulation largeur d'impulsion à au moins deux des groupes de trois couleurs de DEL dans le découpage temporel de réseau de DEL multicolores (430), les au moins deux des groupes de trois couleurs de DEL étant basés au moins partiellement sur une valeur d'une valeur souhaitée de température de couleur corrélée.
  9. L'appareil de commande selon l'une des revendications 6 à 8, dans lequel l'unité de commande (421) est en outre configurée pour fournir un signal à modulation de largeur d'impulsion de découpage temporel à au moins deux des groupes de DEL tricolores dans le réseau de DEL multicolores (430), sur la base au moins partielle de la valeur de la distance.
  10. L'appareil de commande selon l'une des revendications précédentes, dans lequel l'unité de commande (421) est en outre configurée pour fournir un signal de modulation de largeur d'impulsion de découpage temporel au réseau de DEL multicolores (430) en se basant au moins partiellement sur une valeur d'un niveau de flux lumineux souhaité du réseau de DEL multicolores.
  11. L'appareil de commande selon l'une des revendications précédentes, dans lequel l'unité de commande (421) comprend en outre au moins un mécanisme de traduction incluant des mécanismes d'un algorithme et d'une Look-up table, LUT, le mécanisme de traduction étant configuré pour corréler une valeur du signal reçu du module sans fil (423) avec une valeur correspondante du niveau de flux lumineux du réseau de DEL multicolores (430).
  12. L'appareil de commande selon l'une des revendications précédentes, dans lequel la valeur de la distance se trouve sur une ligne isotherme ayant une valeur de température de couleur constante corrélée.
  13. Méthode de réglage de la couleur d'un réseau de DEL multicolores (430) à l'aide d'un appareil de commande (400) selon l'une des revendications 1 à 12, la méthode comprenant:
    recevoir, au niveau d'un module sans fil (423), un signal sans fil qui comprend une valeur de température de couleur corrélée et une valeur de distance d'une température du réseau de DEL multicolores (430) par rapport à une ligne de corps noir (101);
    recevoir, au niveau d'une unité de commande (421), des signaux provenant du module sans fil (423) ;
    traduire, par l'unité de commande (421), les signaux en signaux traduits;
    commander, par l'unité de commande (421), un émulateur de gradateur (440) pour fournir des signaux de commande à un pilote de DEL (410), les signaux de commande dépendant des signaux traduits; et
    recevoir, au niveau de l'unité de commande (421), l'alimentation du pilote de DEL (410) pour le réseau de DEL multicolores (430) sur la base des signaux de commande;
    ajuster la référence de tension réglable pour modifier un rapport de diviseur de tension variable du diviseur de tension résistif; et
    commander le fonctionnement d'un transistor (529) en appliquant un signal de modulation de largeur d'impulsion (531) à une ligne de signal couplée à une grille du transistor (529).
EP20732087.0A 2019-05-28 2020-05-27 Réglage sans fil de couleur pour pilote à courant constant Active EP3977820B1 (fr)

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US201962853515P 2019-05-28 2019-05-28
US16/513,493 US10772169B1 (en) 2019-05-28 2019-07-16 Wireless color tuning for constant-current driver
EP19203165 2019-10-15
PCT/US2020/034751 WO2020243202A1 (fr) 2019-05-28 2020-05-27 Accord de couleur sans fil pour un conducteur à courant constant

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US10772169B1 (en) 2019-05-28 2020-09-08 Lumileds Llc Wireless color tuning for constant-current driver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170127485A1 (en) * 2015-11-02 2017-05-04 Aleddra Inc. Solid-State Lighting Control With Dimmability And Color Temperature Tunability Using low Voltage Controller

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100638723B1 (ko) * 2005-02-04 2006-10-30 삼성전기주식회사 Led 어레이 구동 장치 및 이를 이용한 백라이트 구동 장치
TWI433588B (zh) * 2005-12-13 2014-04-01 Koninkl Philips Electronics Nv 發光二極體發光裝置
US8358089B2 (en) * 2010-05-08 2013-01-22 Lightel Technologies Inc. Solid-state lighting of a white light with tunable color temperatures
JP2012064925A (ja) * 2010-08-18 2012-03-29 Mitsubishi Chemicals Corp Ｌｅｄ発光装置及びｌｅｄ発光装置を備えたインジケータ
US9332598B1 (en) * 2013-08-20 2016-05-03 Ketra, Inc. Interference-resistant compensation for illumination devices having multiple emitter modules
US9374855B2 (en) * 2013-10-24 2016-06-21 Osram Sylvania Inc. Power line communication for lighting systems
WO2017189571A1 (fr) * 2016-04-25 2017-11-02 Osram Sylvania Inc. Systèmes et procédés d'éclairage accordables
US10143058B2 (en) * 2016-06-03 2018-11-27 Litegear Inc. Artificial light compensation system and process
KR102729552B1 (ko) * 2017-02-17 2024-11-12 삼성전자주식회사 Led 구동 장치, 이를 포함하는 조명 장치 및 led 구동 방법

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170127485A1 (en) * 2015-11-02 2017-05-04 Aleddra Inc. Solid-State Lighting Control With Dimmability And Color Temperature Tunability Using low Voltage Controller

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TWI749567B (zh) 2021-12-11
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TW202114473A (zh) 2021-04-01

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