CN114175855A

CN114175855A - Wireless color adjustment for constant current drivers

Info

Publication number: CN114175855A
Application number: CN202080055100.8A
Authority: CN
Inventors: 邱怡峰
Original assignee: Lumileds LLC
Current assignee: Lumileds LLC
Priority date: 2019-05-28
Filing date: 2020-05-27
Publication date: 2022-03-11
Also published as: TWI749567B; WO2020243202A1; EP3977820A1; TW202114473A

Abstract

Various embodiments include apparatus and methods to implement a wireless control apparatus for an LED array. In one example, the control apparatus includes a wireless module that receives signals from a wireless control device. The wireless signal may include a desired CCT value and D_uvA value-dependent signal. Control unitCoupled to the wireless module to translate signals received from the wireless module. The control unit is also coupled to the LED array and to the LED driver. The control unit receives power for the LED array from the LED driver and provides the power to the LED array in a manner based on the translated signal. A dimmer emulator is coupled to the control unit to provide one or more control signals to the LED driver. Other apparatus and methods are described.

Description

Wireless color adjustment for constant current drivers

Priority declaration

The present patent application claims the benefit of priority from U.S. patent application entitled "WIRELESS COLOR TURNING SYSTEM FOR SINGLE-CHANNEL CONSTANT CURRENT DRIVE" serial No. 16/513,493 filed on 7, 16, 2019, U.S. provisional application entitled "WIRELESS COLOR TURNING SYSTEM FOR SINGLE-CHANNEL CONSTANT CURRENT DRIVE" serial No. 62/853,515 filed on 5, 28, 2019, and European application entitled "WIRELESS COLOR TURNING SYSTEM FOR SINGLE-NNCHAEL CONSTANT CURRENT DRIVE" serial No. 19203165.6 filed on 10, 15, 2019, the disclosures of which are incorporated herein by reference in their entireties.

Technical Field

The subject matter disclosed herein relates to color adjustment of one or more Light Emitting Diodes (LEDs) or LED arrays, including lamps that operate substantially in the visible portion of the electromagnetic spectrum. More particularly, the disclosed subject matter relates to a technique to implement, for example, a wireless color adjustment device for a single channel, constant current driver for an LED array.

Background

Light Emitting Diodes (LEDs) are commonly used in various lighting (lighting) operations. The color appearance of an object is determined in part by the Spectral Power Density (SPD) of the light illuminating (illuminating) the object. For a human viewing a subject, the SPD is the relative intensity of various wavelengths within the visible spectrum. However, other factors may also affect the color appearance. Furthermore, both the Correlated Color Temperature (CCT) of an LED and the distance of the temperature of the LED on the CCT from the black body line (BBL, also known as the black body locus or planckian locus) may affect human perception of the subject. In particular, there is a large market demand for LED lighting solutions (such as in retail and hotel lighting applications) where it is desirable to control both the color temperature and brightness level of the LEDs.

There are currently two main techniques for color adjustment (e.g., white adjustment) of LEDs. The first technology is white LEDs based on two or more CCTs. The second technique is based on a combination of red/green/blue/amber colors. The first technique is not at all at D_uvThe ability to directionally adjust the LED. In the second technique, little color adjustment capability is provided as an available function. In those cases, the user is instead typically provided with a color wheel based on a red-green-blue (RGB) or hue-saturation-luminance (HSL) model. However, the RGB and HSL models are not designed for general lighting. Both the RGB and HSL models are more suitable for graphics or photography applications.

The information described in this section is provided to provide a person skilled in the art with a context for the subject matter disclosed below and should not be taken as admissible prior art.

Drawings

FIG. 1 shows a portion of a Commission on International illumination (CIE) color diagram including the Black Body Line (BBL);

FIG. 2A shows a chromaticity diagram with approximate chromaticity coordinates of the colors of typical red (R), green (G), and blue (B) LEDs on the diagram and including a BBL;

FIG. 2B illustrates a revised version of the chromaticity diagram of FIG. 2A with approximate chromaticity coordinates of desatured R, G, and B LEDs near 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;

FIG. 2C shows a revised version of the chromaticity diagram of FIG. 2A with approximate chromaticity coordinates of the desaturated R, G, and B LEDs near the BBL having a Color Rendering Index (CRI) of approximately 80+ and within a defined color temperature range that is wider than the desaturated R, G, and B LEDs of FIG. 2B, in accordance with various embodiments of the disclosed subject matter;

fig. 3 illustrates a prior art color adjustment device requiring a hard-wired flux control device and a separate hard-wired CCT control device;

fig. 4 shows an example of a high level schematic diagram of a wireless color adjustment device, a controller unit, a dimmer emulator, a wireless module, and an LED array comprising, for example, the desaturated LEDs of fig. 2B and 2C, in accordance with various embodiments of the disclosed subject matter; and

fig. 5 illustrates an exemplary embodiment of a dimmer emulator according to various exemplary embodiments of the disclosed subject matter.

Detailed Description

The disclosed subject matter will now be described in detail with reference to a few general and specific embodiments as illustrated in the various figures of the drawing. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the disclosed subject matter. It will be apparent, however, to one skilled in the art, that the disclosed subject matter may be practiced without some or all of these specific details. In other instances, well known process steps or structures have not been described in detail in order to not obscure the disclosed subject matter.

Examples of different light illumination system and/or light emitting diode embodiments will be described more fully below with reference to the accompanying drawings. These examples are not mutually exclusive and features found in one example may be combined with features found in one or more other examples to achieve additional implementations. Thus, it will be understood that the examples shown in the figures are provided for illustrative purposes only and they are not intended to limit the present disclosure in any way. Like numbers generally refer to like elements throughout.

Further, it will be understood that although the terms 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 could be termed a second element, and a second element could 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.

It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element and/or connected or coupled to the other element via one or more intervening elements. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present between the element and the other element. It will be understood that these terms are intended to encompass different orientations of the elements in addition to any orientation depicted in the figures.

Relative terms (such as "below," "above," "upper," "lower," "horizontal," or "vertical") may be used herein to describe one element, region, or area's relationship to another element, region, or area as illustrated in the figures. Those of ordinary skill in the art will understand that such terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. Further, whether the LEDs, LED arrays, electrical components, and/or electronic components are housed on one, two, or more electronic boards, or in one or more physical locations may also depend on design constraints and/or a particular application.

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 (referred to herein simply as LEDs). Due to the compact size and low power requirements of LEDs, LEDs may be attractive candidates for many different applications. For example, they may be used as light sources (e.g., flash and camera flash) for handheld battery-powered devices, such as cameras and cellular telephones. LEDs may also be used, for example, in automotive lighting, Heads Up Display (HUD) lighting, horticulture lighting, street lighting, video-lights, general lighting (e.g., home, shop, office and studio lighting, theater/stage lighting, and architectural lighting), Augmented Reality (AR) lighting, Virtual Reality (VR) lighting, as backlights for displays and IR spectrometers. A single LED may provide less bright light than an incandescent light source, and thus, LED multi-junction devices or arrays (such as monolithic LED arrays, micro LED arrays, etc.) may be used for applications where enhanced brightness is desired or needed.

In various environments where LED-based lamps (or related luminaires) are used to illuminate objects, as well as for general lighting, it may be desirable to control aspects of the color temperature of the lamp in addition to the relative brightness (e.g., luminous flux) of the LED-based lamp (or single lamp). These environments may include, for example, retail locations as well as hotel locations (such as restaurants, etc.). In addition to CCT, another lamp metric is the Color Rendering Index (CRI) of the lamp. The CRI is defined by the international commission on illumination (CIE) and provides a quantitative measure of the ability of any light source, including LEDs, to accurately represent colors in various objects as compared to an ideal or natural light source. The highest possible CRI value is 100. Another quantitative light metric isD _uv。D _uvIs a measure defined, for example, in CIE 1960 to represent the distance of a color point from the BBL. It is positive when the color point is above the BBL and negative when the color point is below the BBL. Color points above the BBL appear greenish (greenish) in color and color points below the BBL appear pink (pinkish) in color. The disclosed subject matter provides for controlling the color temperature (CCT and D) of a lamp_uv) And a brightness level. As described herein, in color adjustment applications, the color temperature is in combination with the CCTD _uvBoth are related.

Thus, the disclosed subject matter is directed to a wireless color adjustment (encompassing CCT andD _uvone or both) for driving LEDs of various colors, including, for example, primary color (red-green-blue or RGB) LEDs or desaturated (soft) RGB color LEDs, to provide light of various color temperatures with high Color Rendering Index (CRI) and high efficiency, particularly using phosphor converted color LEDs to address color mixing. One of ordinary skill in the art will recognize, upon reading and understanding the disclosed subject matter, that a similar scheme may also be used for wireless control of the luminous flux (e.g., "brightness level") of an LED.

As is known in the related art, the forward voltage of a direct color LED decreases as the dominant wavelength increases. The LEDs may be driven with, for example, a multi-channel DC-DC converter. Advanced phosphor converted color LEDs (for high efficacy and CRI) have been created that offer new possibilities for Correlated Color Temperature (CCT) tuning applications. Some of the advanced color LEDs have a reduced saturation color point and can be mixed to achieve a white color with 90+ CRI over a wide CCT range. Other LEDs having an 80+ CRI implementation or even a 70+ CRI implementation (or even lower CRI values) can also be used with the disclosed subject matter. These possibilities use LED circuits (that realize and increase or maximize this potential). At the same time, the control circuit described herein is compatible with single channel constant current drivers for market adoption.

As known to those of ordinary skill in the art, because the light output of an LED is proportional to the amount of current used to drive the LED, dimming the LED may be accomplished, for example, by reducing the forward current delivered to the LED. In addition to or instead of varying the amount of current used to drive each of the plurality of individual LEDs, a control unit (described in detail below with reference to fig. 4) or other type of multiplexer, switching device, or similar device known in the art may rapidly switch selected ones of the LEDs between "on" and "off states to achieve appropriate levels of dimming and color temperature of the selected lamps.

In general, an LED driving circuit is formed using an analog driver method or a Pulse Width Modulation (PWM) driver method. In the analog driver method, all colors are driven simultaneously. Each LED is driven independently by providing a different current to each LED. Analog drivers cause color shifts and currently cannot change the three current ways. Analog driving typically results in driving a particular color LED into a low current mode and driving it into a very high current mode at other times. This wide dynamic range imposes challenges on the sensing and control hardware.

In a PWM driver, each color is sequentially turned on at a high speed. The colors are driven with substantially the same current. The mixed colors are controlled by varying the duty cycles of the colors. That is, one color may be driven twice as long as another color to add to the mixed color. Since human vision cannot perceive very rapidly changing colors, light appears to have one single color.

For example, a first LED (having a first color) is periodically driven with a current for a predetermined amount of time, then a second LED (having a second color) is periodically driven with the same current for a predetermined amount of time, and then a third LED (having a third color) is periodically driven 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. Therefore, the mixed color is controlled by changing the duty ratio of each color. For example, if you have RGB LEDs and a particular output is desired, based on the perception of the human eye, red may be driven for one part of the cycle, green for a different part of the cycle, and blue for yet another part of the cycle. Instead of driving the red LED at a lower current, the LED is driven at substantially the same current for a shorter time. This example demonstrates the disadvantages of PWM, where LEDs are poorly utilized, thus resulting in inefficient power usage. In some embodiments, the current is supplied from a voltage controlled current source.

Another advantage of the disclosed subject matter over the prior art is that the desaturation RGB process can create tunable light on and off the BBL as well as on the BBL (e.g., isothermal CCT lines (as described below)) while maintaining a high CRI. In contrast, various other prior art systems utilize a CCT approach, where the adjustable color point falls on a straight line between the two primary colors (e.g., R-G, R-B or G-B) of the LED.

Fig. 1 illustrates a portion of a commission internationale de l' eclairage (CIE) color diagram 100, which includes a Black Body Line (BBL) 101 (also known as the planckian locus), which forms the basis for understanding various embodiments of the subject matter disclosed herein. BBL 101 shows the chromaticity coordinates of a black body radiator at varying temperatures. It is generally recognized that in most lighting situations, the light source should have chromaticity coordinates located on or near the BBL 101. The "closest" black body radiator is determined using various mathematical procedures known in the art. As mentioned aboveThis common lamp specification parameter is referred to as Correlated Color Temperature (CCT). Useful and complementary ways of further describing chromaticity are provided byD _uvThe value is provided by the value providing unit,D _uvthe value is that the chromaticity coordinate of the lamp is above (positive for) the BBL 101D _uvValue) or below the BBL 101 (negative)D _uvValue) of the level of the.

Portions of the color map are shown as including a plurality of isotherms 117. Even if each of these lines is not on the BBL 101, any color point on the isotherm 117 has a constant CCT. For example, the first isotherm 117A has a CCT of 10,000K, the second isotherm 117B has a CCT of 5,000K, the third isotherm 117C has a CCT of 3,000K, and the fourth isotherm 117D has a CCT of 2,200K.

With continued reference to fig. 1, the CIE color diagram 100 also shows a plurality of ellipses representing macadam ellipses (MAEs) 103, the MAEs 103 centered on the BBL 101 and extending a distance of one step 105, three steps 107, five steps 109, or seven steps 111 from the BBL 101. The MAE is based on psychometric studies and defines an area on the CIE chromaticity diagram that contains all colors (indistinguishable to a typical observer from the colors at the center of the ellipse). Thus, for a typical observer, each of the MAE steps 105-111 (one step to seven steps) is considered to be substantially the same color as the color at the center of the respective each of the MAEs 103. A series of curves 115A, 115B, 115C, and 115D represent substantially equal distances from the BBL 101 and are, for example, +0.006, +0.003, 0, -0.003, and-0.006D _uvThe values are correlated.

Referring now to fig. 2A, and with continued reference to fig. 1, fig. 2A shows a chromaticity diagram 200 having approximate chromaticity coordinates of the colors of the typical coordinate values (as noted on the x-y scale of chromaticity diagram 200) for red (R) LEDs at coordinates 205, green (G) LEDs at coordinates 201, and blue (B) LEDs at coordinates 203. Fig. 2A illustrates an example of a chromaticity diagram 200 for defining a wavelength spectrum of a visible light source, according to some embodiments. The chromaticity diagram 200 of FIG. 2A is but one way of defining the wavelength spectrum of a visible light source; other suitable definitions are known in the art and may also be used with the various embodiments of the disclosed subject matter described herein.

A convenient way to specify portions of the chromaticity diagram 200 is through a set of equations in the x-y plane, where each equation has a trajectory that defines a solution to a line on the chromaticity diagram 200. As described in more detail below with reference to fig. 2B, lines may intersect to designate a particular region. Alternatively defined, a white light source can emit light corresponding to light from a black body 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

positions

201, 203, 205 is the CCT coordinate of a "fully saturated" LED for the respective colors green, blue and red. However, if "white light" is created by combining a certain ratio of R, G and B LEDs, the CRI of such a combination will be extremely low. Generally, in the above-described environment (such as a retail or hotel setting), a CRI of about 90 or higher is desired.

Fig. 2B shows a modified version of the chromaticity diagram 200 of fig. 2A with approximate chromaticity coordinates of the desaturated R, G, and B LEDs near the BBL 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.

However, the chromaticity diagram 250 of fig. 2B shows the approximate chromaticity coordinates of the desaturated (soft) R, G, and B LEDs near the BBL 101. Coordinate values 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 are shown (as noted on the x-y scale of chromaticity diagram 250). In various embodiments, the color temperature range of the desaturated R, G, and B LEDs may range from about 1800K to about 2500K. In other embodiments, the desaturated R, G, and B LEDs may be in a color temperature range of, for example, about 2700K to about 6500K. In other embodiments, the desaturated R, G, and B LEDs can be in a color temperature range of about 1800K to about 7500K. In other embodiments, the desaturated R, G, and B LEDs may be selected to be within a wide range of color temperatures. As mentioned above, the Color Rendering Index (CRI) of a light source is not indicative of the apparent color of the light source; this information is given by the Correlated Color Temperature (CCT). Thus, CRI is a quantitative measure of the ability of a light source to faithfully visualize the colors of various objects as compared to an ideal or natural light source.

In certain exemplary embodiments, a triangle 257 formed between each of the coordinate values of the desaturated R LED, the G LED, and the B LED is also shown. The desaturated R, G, and B LEDs are formed with coordinate values near the BBL 101 (e.g., by a mixture of phosphors and/or a mixture of materials forming the LEDs as is known in the art). Thus, each of the down-saturated R, G, and B LEDs and the coordinate positions as summarized by triangle 257 has a CRI of about 90 or greater and an approximate adjustable color temperature range of, for example, about 2700K to about 6500K. Thus, the choice of Correlated Color Temperature (CCT) can be selected in the color adjustment applications described herein such that all CCT combinations selected will result in a lamp having a CRI of 90 or greater. Each of the desaturated R, G, and B LEDs can include a single LED or an array (or group) of LEDs, where each LED within the array or group has the same or similar desaturated color as the other LEDs within the array or group. The combination of one or more of the desaturated R LEDs, G LEDs, and B LEDs comprises a lamp.

Fig. 2C shows a modified version of the chromaticity diagram 200 of fig. 2A with approximate chromaticity coordinates of the desaturated R, G, and B LEDs near the BBL having a Color Rendering Index (CRI) of approximately 80+ and within a broader defined color temperature range than the desaturated R, G, and B LEDs of fig. 2B, in accordance with various embodiments of the disclosed subject matter.

However, the chromaticity diagram 270 of fig. 2C shows approximate chromaticity coordinates of the down-saturated R, G, and B LEDs that are arranged farther from the BBL 101 than the down-saturated R, G, and B LEDs of fig. 2B. Coordinate values for the desaturated red (R) LED at coordinate 275, the desaturated green (G) LED at coordinate 273, and the desaturated blue (B) LED at coordinate 271 are shown (as noted on the x-y scale of chromaticity diagram 270). In various embodiments, the color temperature range of the desaturated R, G, and B LEDs may range from about 1800K to about 2500K. In other embodiments, the desaturated R, G, and B LEDs may be in a color temperature range of about 2700K to about 6500K. In other embodiments, the desaturated R, G, and B LEDs can be in a color temperature range of about 1800K to about 7500K.

In certain exemplary embodiments, a triangle 277 formed between each of the coordinate values of the desaturated R LED, G LED, and B LED is also shown. The desaturated R, G, and B LEDs are formed with coordinate values near the BBL 101 (e.g., by a mixture of phosphors and/or a mixture of materials forming the LEDs as is known in the art). Thus, each of the down-saturated R, G, and B LEDs, and the coordinate locations as summarized by triangle 277, has a CRI of about 80 or greater and an approximate adjustable color temperature range of, for example, about 1800K to about 7500K. Since the range of color temperatures is greater than that shown in fig. 2B, the CRI is correspondingly reduced to about 80 or greater. However, one of ordinary skill in the art will recognize that a desaturated R LED, G LED, and B LED can be produced with individual color temperatures anywhere within the chromaticity diagram. Thus, the choice of Correlated Color Temperature (CCT) can be selected in the color adjustment applications described herein such that all CCT combinations selected will result in a lamp having a CRI of 80 or greater. Each of the desaturated R, G, and B LEDs can include a single LED or an array (or group) of LEDs, where each LED within the array or group has the same or similar desaturated color as the other LEDs within the array or group. The combination of one or more of the desaturated R LEDs, G LEDs, and B LEDs comprises a lamp.

Fig. 3 shows a prior art color adjustment device 300 that requires 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 combined LED driver circuit/LED array 320. The combined LED driver 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, CCT control device 303 and single channel driver circuit 305 is located in the consumer facility 310 and typically all devices must be installed with applicable national and ground regulations governing high voltage circuits. The combined LED driver circuit/LED array 320 is typically located away (e.g., several meters to tens of meters or more) from the consumer facility 310. Thus, both the initial purchase price and the installation price may be important.

Thus, in conventional color adjustable systems powered by single channel constant current drivers, two control inputs are typically required, one for flux control (e.g., luminous flux or dimming) and the other for color adjustment. The control input may be implemented by, for example, an electromechanical device such as a linear or rotary slider, a DIP switch, or a standard 0V to 10V dimmer. While dimmers for flux control may already be present in existing installations, it may be difficult and expensive to accommodate a second dimmer for CCT control in a retrofit setting due to electrical wiring requirements (including various types of compliance issues). The disclosed subject matter overcomes these limitations and expense by eliminating all dimmers from installation. As one of ordinary skill in the art will immediately recognize upon reading and understanding the disclosed subject matter described below, all physical control devices (e.g., dimmers) are eliminated.

Fig. 4 shows an example of a high-level schematic diagram of a wireless color adjustment 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, according to various embodiments of the disclosed subject matter. The LED array 430 may include, for example, the desaturated LEDs of fig. 2B and 2C.

The dimmer emulator 440 is described in detail below with reference to fig. 5. However, in various embodiments, the dimmer emulator 440 is capable of performing many operations in series. These operations may include, for example, receiving and processing CCT, D_uvAnd a signal of at least one of the luminous flux. In some embodiments, where the dimmer simulator 440 performs multiple operations substantially simultaneously, the dimmer simulator 440 may be instantiated multiple times to control various operations of the LED array 430. If the wireless color adjustment device 400 is only configured to control the luminous flux, a person skilled in the art may consider the wireless color adjustment device 400 as a wireless LED control device.

In some embodiments, each of the control unit 421, the dimmer emulator 440, the wireless module 423, and the LED array 430 can be contained within the light engine housing 420. In some embodiments, 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 housing 420, and the other of the control unit 421, the dimmer emulator 440, the wireless module 423, and/or the LED array 430 may be located outside the light engine housing 420, either close to each other (e.g., within a few meters) or further away from each other (e.g., tens of meters). As one of ordinary skill in the art will immediately recognize, all physical control devices (e.g., dimmers) that are hardwired are eliminated.

The wireless color adjustment device 400 includes a single channel driver circuit (e.g., LED driver 410). In some embodiments, the LED driver 410 may be positioned within a consumer mounting area. In some embodiments, the LED driver 410 may be located remotely from the consumer installation area (but generally still within the consumer facility). In some embodiments, the LED driver 410 may be positioned within a light engine housing 420 (e.g., a junction box or other type of electronics housing for housing various types of electrical or electronic components).

As known to those of ordinary skill in the art, because the light output of an LED is proportional to the amount of current used to drive the LED, dimming the LED may be accomplished, for example, by reducing the forward current delivered to the LED. The LED driver 410 sends a predetermined amount of current to one, two, or all three colors of the LED array 430 to change the overall CCT of the LED array 430 and/orD _uvAnd (4) horizontal.

However, in addition to or instead of varying the amount of current used to drive each of the individual ones of the LEDs in the LED array 430, a control unit (described below with reference to fig. 5) may rapidly switch selected ones of the LEDs or selected color groups in the LED array 430 between "on" and "off states to achieve an appropriate dimming level for the selected lamp in accordance with a desired intensity as indicated by an end user when setting a desired brightness level on, for example, a flux control device.

LEDThe driver 410 is coupled to the control unit 421 through the LED + signal line 411 and the LED-signal line 413 and provides power to the LED array 430 through the control unit 421. The control unit 421 may be, for example, a microcontroller, microprocessor, or other processing unit known in the art. In some embodiments, 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). The control unit 421 is configured to control the LED array 430, the LED array 430 being coupled to the control unit 421. For example, the control unit 421 receives a wireless-based signal from the wireless module 423 to control various operations and illumination modes of the LED array 430. As discussed above, the control operations may include, for example, received signals to adjust luminous flux, CCT, and/or D from the BBL_uvDistance (e.g., along the isotherm of the received CCT, see fig. 1). The LED array 430 may be any type of multi-color LED array including the desaturated type of LEDs described above with reference to fig. 2B and 2C.

Signals received from the wireless module 423 are interpreted or translated by algorithms within the control unit 421. The interpretation or translation provides a determination of how the received wireless signal affects the operation of the LED array 430. For example, the control unit 421 may correlate a particular signal amplitude and signal type (e.g., series and periodicity of received signals) to a particular operation of the LED array 430. Particular types of operations may include CCT, D_uvAnd/or at least one of the luminous flux.

In some embodiments, the received signal is compared (to the particular CCT, D of one or more groups of individual colors of LEDs within the LED array 430) by comparing the received signal to a look-up table (LUT) stored, for example, within the control unit 421_uvAnd/or luminous flux settings) to determine how the received wireless signal affects the operation of the LED array 430. In various embodiments, the translation mechanism of the control unit 421 includes both an algorithm embodiment and a LUT embodiment, which may be used simultaneously to translate the various components of the received signal.

Further, although not explicitly shown, the control unit 421 may control the switching operation of individual LEDs or individual LED color groups within the LED array 430.For example, the control unit may provide a PWM signal based on a signal received from the wireless module 423 to change the CCT, D selected by the user by switching a selected color or group of colors of LEDs within the LED array 430_uvAnd/or the luminous flux provided to the LED array 430.

In various embodiments, at least one of the LED driver 410 (see fig. 4) and the control unit 421 may include or include a control unit for CCT and CCTD _uvAdjustment and hybrid LED driving circuits for luminous flux control. The hybrid drive circuit may include an LED driver to generate a stable LED driver current. In certain exemplary embodiments, the control unit 421 is based on, for example, a desired CCT andD _uvthe adjustment delivers current to the appropriate LED or group of LED colors within the LED array 430. The hybrid driving circuitry within the control unit 421 may then be overlaid with PWM time slices that direct current to at least two colors in the LED array 430.

In various embodiments, the control unit 421 may be configured to have a special calibration mode. The calibration mode may operate with an algorithm in the LUT (although the user may need to access underlying software or firmware to make changes to the values) or values. For example, the control unit 421 may enter the calibration mode when it is power cycled in a particular sequence (e.g., a combination of long and short power on/off cycles). While in the calibration mode, a user (e.g., a calibration technician or a high-level end user at a factory) is required to change the associated values of the output signals of the three control devices to their respective control values (CCT, D)_uvAnd/or flux). The control unit 421 then stores these two algorithms or values in, for example, software or firmware (e.g., EEPROM) or hardware (e.g., Field Programmable Gate Array (FPGA)) in an internal memory. The internal memory may take many 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.

With continued reference to fig. 4, the wireless module 423 provides the wirelessly received signal to the control unit 421. The wireless module 423 may be any type of open source standard or proprietary standard. In various embodiments, the wireless module 423 is configured to provide signals to the control unit 421 via predefined protocols (some of which are described below). In some embodiments, it may be desirable for wireless module 423 to have low power consumption when it is powered by LED current. In the case where the wireless module 423 operates in a burst (burst) of high peak current, a large decoupling capacitor (described below with reference to fig. 5) may be used to reduce the voltage/current (power) droop in the power (e.g., voltage and/or current) supplied to the LEDs, thereby eliminating or reducing light flicker from the LED array 430.

The wireless module 423 may be configured to receive signals and communicate with the control unit 421 over, for example, a serial interface in a predefined protocol as is known in the art. In certain exemplary embodiments, the wireless module 423 uses a universal asynchronous receiver-transmitter (UART) communication protocol. In other embodiments, wireless module 423 may use an inter-integrated circuit (I-squared-C or I)²C) A protocol, a Serial Peripheral Interface (SPI), or other types of communication protocols known in the art. The wireless signal may be via Wi-Fi^®、Bluetooth^®、Zigbee^®、Z-Wave^®Fifth generation cellular network technology (5G), or other communication technology known in the art, from the wireless control device 450 at the remote location to the wireless color adjustment device 400.

Further, although the wireless control device 450 is shown as including increasing or decreasing CCT, D_uvAnd buttons for each of the light fluxes, only one or two of the set of buttons may be included in an actual wireless device. For example, in some embodiments, the wireless control device 450 may include only a single set of buttons for increasing or decreasing the CCT. In other embodiments, the wireless control device 450 may include only two sets of buttons for increasing or decreasing both CCT and luminous flux. In other embodiments, the wireless control device 450 may include only a single set of "up and down" buttons with selector switches to determine, for example, CCT, D_uvAnd which of the light fluxes is associated with the increase and decrease button groups. Derived from wireless control for a given communication protocol pairProgramming of these signals for device 450 is known in the art.

The wireless control device 450 may include an electrical control device, a mechanical control device, or a software control apparatus, each of which is configured to indicate (e.g., indicate CCT, D)_uvAnd/or luminous flux (intensity level of LED array 430) to wireless module 423 of fig. 4. The wireless control device 450 may be based on analog signals or digital signals. One of the components within the light engine housing 420, such as, for example, the wireless module 423 or the control unit 421, may include an analog-to-digital converter (ADC) if the wireless control device is based on analog output.

Dimmer emulator 440 receives instructions from control unit 421 to provide signals on 0V to 10V +

signal line

415 and 0V to 10V-signal line 417 to the inputs of LED driver 410. The dimmer emulator is described in more detail below with reference to fig. 5.

In various embodiments, the dimmer emulator 440 is not powered by the current supplied by the LED driver 410 to the LED array 430. In these embodiments, power for the dimmer emulator 440 may be supplied by the 0V to 10V interface of the LED driver 410. Most commercially available LED 0V to 10V interfaces provide unit current from between about 150 μ Α and about 200 μ Α. In other embodiments, a separate power supply may be mounted near the dimmer emulator 440 (e.g., within the light engine housing 420).

Typically, under the prior art, when a physical 0V to 10V dimmer is used, the physical dimmer is configured to control one or many LED drivers simultaneously. When multiple LED drivers are connected to the same dimmer, the dimmer must be able to draw the sum of all currents and still maintain a relatively stable output voltage. On the other hand, the dimmer must be able to operate reliably from only one LED driver. Electrically, the dimmer should behave as a variable voltage regulator regardless of its input current. The output voltage is typically determined only by its control input (e.g., typically the position of the slider).

Fig. 5 illustrates the dimmer emulation of fig. 4 in accordance with various exemplary embodiments of the disclosed subject matterExemplary embodiment of a vacuum 440. In the exemplary embodiment, dimmer emulator 440 is shown as including a current source 501, a first capacitor 503 (C)₁) Optional over-current protection device 505 (F)₁) Diode 507 (D)₁) Adjustable voltage reference 509 (U)₁) And other components described in detail below. These other components form transient response and frequency stabilization circuits, as well as resistive voltage dividers with variable division ratios.

A current source 501 and a first capacitor 503 (C)₁) Represents the 0V to 10V interface output of the LED driver 410 of fig. 4. In certain exemplary embodiments, the first capacitor 503 comprises a 1 μ F capacitor. A current source 501 and a first capacitor 503 (C)₁) Will have a current (I) of about 150 μ A₁) To the rest of the circuit including the dimmer emulator 440.

Diode 507 (D)₁) The dimmer emulator 440 circuitry is protected from medium level overcurrents and/or overvoltages. Optional over-current protection device 505 (F)₁) Resettable fuses may be included to protect the dimmer emulator 440 circuit from high levels of overcurrent (such as incorrectly connecting the output of the LED driver 410 output to the dimmer emulator 440 circuit). Thus, an optional over-current protection device 505 is inserted in series upstream of the diode 507 (e.g., at the current source 501 and the first capacitor 503 (C)₁) And diode 507). In a particular exemplary embodiment, diode 507 includes an 11V Zener (Zener) diode. The optional over-current protection device 505 may comprise a Positive Temperature Coefficient (PTC) device. In various embodiments, the optional over-current protection device 505 is also generally referred to as any type of passive component resettable fuse device, such as a multiple fuse, poly-fuse (poly-fuse), or poly-switch (poly-switch) device.

In various embodiments, the adjustable voltage reference 509 (U)₁) (described in more detail below) includes a precision variable shunt voltage regulator. In this embodiment, an adjustable voltage reference 509 (U)₁) Includes a low voltage, three terminal adjustable voltage reference at a selected temperature rangeThe inside of the enclosure has specified thermal stability. In certain exemplary embodiments, the adjustable voltage reference 509 (U)₁) Is a TLV431AFTA device (manufactured by Diodes Incorporated, 4949 Hedgcoxe Road, Suite 200; Plano, Texas, 75024, USA). In this particular exemplary embodiment, the output voltage of the adjustable voltage reference 509 may be implemented with two external resistors (fourth resistor 517 (R)₄) And a fifth resistor 515 (R)₅) Set to V at 1.24V and 18V)_REFAny value in between. In certain exemplary embodiments, R₄And R₅Each of which is about 1 k omega. As discussed in more detail below, the output voltage V_outCan be set as low as a reference voltage V_REF(e.g., 1.24V. + -. 1%).

With continued reference to FIG. 5, a first resistor 523 (R)₁) A second resistor 521 (R)₂) And a third resistor (R)₃) Incorporating a transistor 529 (M)₁) Collectively determine the voltages appearing at the 0V to 10V + nodes (see fig. 4). Transistor 529 (M)₁) Is controlled by a signal on a signal line 531 coupled to the gate of a transistor 529. The signal may be, for example, a PWM signal. Component R₁、R₂、R₃And M₁Determines the voltage independent of the input current. In this embodiment, the only control signal is the duty cycle of the PWM signal. In certain exemplary embodiments, the signal line 531 is coupled to a gate of a field effect transistor (e.g., a MOSFET device). Each of the second and

third resistors

521, 525 is coupled to opposite sides of the transistor 529 (e.g., to the drain and source of the transistor). Thus, the PWM signal on signal line 531 controls conduction of current through the drain and source.

The circuit is capable of covering a wide voltage range (between 0% and 100%). An analysis of the two extremes of the PWM duty cycle is presented immediately below to better illustrate the functionality of this common component combination.

At 0% PWM duty cycle (e.g., no voltage signal present on signal line 531), transistor 529 (M)₁) The shutdown is continued. Thus, the third resistor 525 (R)₃) Is an open circuit. Thus, the first resistor 523 (R)₁) And a second resistor 521 (R)₂) Forming a resistive voltage divider. When the adjustable voltage is referenced 509 (U)₁) In operation, the reference input voltage is about 1.24V, for example. In this case, the value in the range of 0V to 10V + is determined by:

（1）

using the exemplary values R given above₁=72 k Ω and R₂= 240K Ω, V determined by equation (1)_outIs about 1.61V. Due to the inclusion of R₁And R₂The resistive voltage divider of (a) is an attenuator, so the value of 0V to 10V + cannot be lower than the reference voltage (e.g., 1.24V). If a lower voltage is desired, a similar circuit with a reference voltage lower than 1.24V may be used.

At the other extreme of continued analysis, at 100% PWM duty cycle (e.g., maximum voltage signal present on signal line 531), transistor 529 (M)₁) The switch-on is continued. Thus, the third resistor 525 (R)₃) And a second resistor 521 (R)₂) Are connected in parallel, and R₂And R₃Is combined with a first resistor 523 (R)₁) Are connected in series. In this case, the value of the 0V to 10V signal is determined by:

（2）

as can be appreciated by those skilled in the art, there are now two equations and three variables. However, the third equation is given by the 0V to 10V + voltage at 100% PWM duty cycle and the minimum input current 150 μ Α as given by the above exemplary description. Thus, the goal under this condition is to have 10V (as mentioned above, a wide voltage range is desired). Adjustable voltage reference 509 (U)₁) Consumes some current and therefore not all 150 μ A flows through the first resistor 523 (R)₁). In the regulation, can be carried outTest to obtain an adjustable voltage reference 509 (U)₁) The actual current consumption. Therefore, the third equation becomes:

（3）

for the exemplary resistance values provided above, I_R1Is approximately equal to 134.4 mua, and therefore passes through the adjustable voltage reference 509 (U)₁) The current loss of (a) is about 15.6 μ a (in this example, 150 μ a-134.4 μ a =15.6 μ a).

Between these two states (1.24V at 0% PWM duty cycle and 10V at 100% PWM duty cycle), transistor 529 (M)₁) Is switched to cause the third resistor 525 (R)₃) Effective resistance in the path at R₃And a very high impedance. R₃The effective change in resistance value of (a) creates a resistive voltage divider with a variable ratio. In certain exemplary embodiments, R₁、R₂And R₃Are about 72K omega, about 240K omega and about 10K omega, respectively.

With continued reference to FIG. 5, a second capacitor 519 (C)₂) Acting as a decoupling capacitor. Second capacitor 519 (C)₂) Removal of the transistor 529 (M) due to application of the PWM signal to the signal line 531₁) High frequency ripple caused by the switching of (2). All other components shown in fig. 5 (e.g., third capacitor 513 (C)₃) A fourth capacitor 527 (C)₄) And a fifth capacitor 511 (C)₅) For transient response and frequency stability.

In certain exemplary embodiments, C₂Has a capacitance value of about 4.7 muf. C₃、C₄And C₅Each having a value of about 100 nF.

In some embodiments, various ones of the various components and modules described above may include software-based modules (e.g., code stored or otherwise embodied in a machine-readable medium or transmission medium), hardware modules, or any suitable combination thereof. A hardware module is a tangible (e.g., non-transitory) physical component (e.g., a set of one or more microcontrollers or microprocessors or other hardware-based devices) capable of performing certain operations and interpreting output signals received from, for example, wireless module 423 of fig. 4. One or more modules may be configured or arranged in a particular physical manner. In various embodiments, one or more microcontrollers or microprocessors, or one or more hardware modules thereof, may be configured by software (e.g., by an application or portion thereof) as a hardware module that operates to perform the operations described herein for that module.

In some example embodiments, the hardware modules may be implemented, for example, mechanically or electronically, or by any suitable combination thereof. For example, a hardware module may comprise dedicated circuitry or logic that is permanently configured to perform certain operations. The hardware module may be or include a special purpose processor, such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC). A hardware module may also comprise programmable logic or circuitry that is temporarily configured by software to perform certain operations. As one example, a hardware module may include software embodied within a Central Processing Unit (CPU) or other programmable processor. It will be appreciated that the decision to implement a hardware module mechanically and electrically in a dedicated and permanently configured circuit or in a temporarily configured circuit (e.g., via software configuration) may be driven by cost and time considerations.

In various embodiments, many of the described components may include one or more modules configured to implement the functionality disclosed herein. In some embodiments, these modules may constitute software modules (e.g., code stored on or otherwise embodied in a machine-readable medium or transmission medium), hardware modules, or any suitable combination thereof. A "hardware module" is a tangible (e.g., non-transitory) physical component (e.g., a set of one or more microprocessors or other hardware-based devices) capable of performing specific operations and interpreting specific signals. One or more modules may be configured or arranged in a particular physical manner. In various embodiments, one or more microprocessors or one or more hardware modules thereof may be configured by software (e.g., an application or portion thereof) as a hardware module that operates to perform the operations described herein for that module.

In some example embodiments, the hardware modules may be implemented, for example, mechanically or electronically, or by any suitable combination thereof. For example, a hardware module may comprise dedicated circuitry or logic that is permanently configured to perform certain operations. As mentioned above, the hardware module may comprise or contain a special purpose processor, such as an FPGA or an ASIC. The hardware modules may also include programmable logic or circuitry that is temporarily configured by software to perform certain operations, such as the interpretation of various signals received by the control unit 421 from the wireless module 423 (see fig. 4).

Thus, in one embodiment, a method of color adjusting a Light Emitting Diode (LED) array includes receiving a wireless signal at a wireless module, the wireless signal including (containing a CCT value and a temperature of the LED array from a BBLD _uvOf) at least one of the signals. The method also includes receiving, at the control unit, one or more signals from the wireless module, and translating, by the control unit, the one or more signals based on the wireless signal from the wireless control device. The control unit is further coupled to the LED array and to the LED driver, and the method further includes the control unit receiving power for the LED array from the LED driver and providing power to the LED array in a manner based on the translated signal. The dimmer emulator is coupled to the control unit. The method further includes the dimmer emulator providing one or more control signals to the LED driver, the one or more control signals being controlled by the control unit and dependent on the translated signal.

The method may further include adjusting, in the dimmer emulator, an adjustable voltage reference coupled to the current source and the transistor to alter the variable division ratio of a resistive voltage divider including a first resistor coupled in series to a first end of a second resistor and a first end of a third resistor, each of the second and third resistors coupled on their respective second ends to opposite sides of the transistor.

The method may further comprise controlling the operation of the transistor by applying the PWM signal to a signal line (coupled to the gate of the transistor).

The method may further include the control unit correlating the values of the signals received from the wireless modules (including the CCT value and D)_uvOf values) and/or using a LUT to correlate values of signals received from a radio module with (including CCT value and D)_uvOf values) are associated with corresponding values of at least one of the values.

The method may further include the control unit supplying the PWM time-sliced signal to at least two of the tri-color groups of LEDs within the LED array, the at least two of the tri-color groups of LEDs based at least in part on a desired value of CCT and/or a desired D_uvThe value of (c).

The method further comprises the control unit using an algorithm and a LUT to associate a value of the signal received from the wireless module with a corresponding value of the luminous flux level of the LED array.

In another embodiment, a computer-readable storage medium stores instructions for execution by one or more processors of a control device to perform color adjustment of a Light Emitting Diode (LED) array. The instructions, when executed, configure the one or more processors to: receiving a wireless signal at a wireless module, the wireless signal comprising (D comprising a CCT value and a temperature distance BBL of an LED array_uv) At least one of the signals of (a); receiving one or more signals from the wireless module at the control unit; and translating, by the control unit, the one or more signals based on the wireless signal from the wireless control device. The control unit is further coupled to the LED array and to the LED driver, and the instructions, when executed, further configure the control unit to receive power for the LED array from the LED driver and provide power to the LED array in a manner based on the translated signal. The dimmer emulator is coupled to the control unit. The instructions, when executed, further configure the dimmer emulator to provide one or more control signals to the LED driver, the one or more control signals being controlled by the control unit and dependent on the translated signal。

The instructions, when executed, further configure in the dimming simulator to adjust an adjustable voltage reference coupled to the current source and the transistor to change a variable division ratio of a resistive voltage divider comprising a first resistor coupled in series to a first end of a second resistor and a first end of a third resistor, each of the second and third resistors coupled on their respective second ends to opposite sides of the transistor.

The instructions, when executed, further configure the one or more processors to control operation of the transistor by applying the PWM signal to a signal line (coupled to a gate of the transistor).

The instructions, when executed, further configure the control unit to: correlating the value of the signal received from the radio module (including the CCT value and D)_uvOf values) and/or using a LUT to correlate values of signals received from a radio module with (including CCT value and D)_uvOf values) are associated with corresponding values of at least one of the values.

The instructions, when executed, further configure the control unit to supply a PWM time-slicing signal to at least two of the tri-color groups of LEDs within the LED array, the at least two of the tri-color groups of LEDs based at least in part on a desired value of CCT and/or a desired D_uvThe value of (c).

The instructions when executed further configure the control unit to use an algorithm and a LUT to associate a value of a signal received from the wireless module with a corresponding value of the luminous flux level of the LED array.

The above description includes illustrative examples, devices, systems, and methods embodying the disclosed subject matter. In the description, for purposes of explanation, numerous specific details are set forth in order to provide an understanding of various embodiments of the disclosed subject matter. It will be apparent, however, to one of ordinary skill in the art that various embodiments of the subject matter may be practiced without these specific details. In other instances, well-known structures, materials, and techniques have not been shown in detail in order not to obscure the various illustrated embodiments.

As used herein, the term "or" may be understood in an inclusive or exclusive sense. Moreover, other embodiments will be apparent to those of ordinary skill in the art upon reading and understanding the provided disclosure. Further, upon reading and understanding the disclosure provided herein, one of ordinary skill in the art will readily appreciate that various combinations of the techniques and examples provided herein may all be applied in various combinations.

While various embodiments are discussed separately, these separate embodiments are not intended to be considered as independent techniques or designs. As indicated above, each of the various portions may be interrelated and each may be used alone or in combination with other types of electrical control devices (such as dimmers and related devices). Thus, while various embodiments of the methods, operations, and procedures have been described, the methods, operations, and procedures may be used alone or in various combinations.

Thus, many modifications and alterations will occur to others upon reading and understanding the disclosure provided herein. Functionally equivalent methods and apparatuses within the scope of the invention, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing description. Portions and features of some embodiments may be included in or substituted for those of others. Such modifications and variations are intended to fall within the scope of the appended claims. Accordingly, the disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

The Abstract of the disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the claims. In addition, in the foregoing detailed description, it can be seen that various features may be grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of the invention should not be construed as limiting the claims. Thus the following claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate embodiment.

Claims

1. A control device for color adjustment of a Light Emitting Diode (LED) array, the device comprising:

a wireless module configured to receive a wireless signal from a wireless control device, the received wireless signal including a distance value (D) from a Black Body Line (BBL) including a Correlated Color Temperature (CCT) value and a temperature of the LED array_uv) At least one of the signals of (a);

a control unit coupled to the wireless module and configured to translate one or more signals received from the wireless module, the one or more signals based on the wireless signal from the wireless control device, the control unit further coupled to the LED array and coupled to an LED driver, the control unit configured to receive power for the LED array from the LED driver, the control unit further configured to provide the power to the LED array in a manner based on the translated signals; and

a dimmer emulator coupled to the control unit and configured to provide one or more control signals to the LED driver, the one or more control signals being controlled by the control unit and dependent on the translated signal.

2. The control device of claim 1, wherein the dimmer emulator comprises:

current source:

an adjustable voltage reference coupled to the current source;

a transistor coupled to the adjustable voltage reference; and

a resistive voltage divider configured to have a variable division ratio.

3. The control apparatus of claim 2, wherein the resistive voltage divider comprises a first resistor coupled in series to a first end of a second resistor and a first end of a third resistor, each of the second and third resistors coupled on their respective second ends to opposite sides of the transistor.

4. The control device of claim 3, further comprising a signal line coupled to a gate of the transistor, wherein operation of the transistor is controlled by applying a Pulse Width Modulation (PWM) signal to the signal line.

5. The control device of claim 4, wherein the variable division ratio is determined by a duty cycle of the applied PWM signal.

6. The control device of claim 4, wherein the applied PWM signal is configured to vary an effective resistance of the third resistor between a value of the third resistor and a resistance value higher than the value of the third resistor, thereby providing the variable voltage division ratio.

7. The control device of claim 1, wherein the LED array comprises at least one LED for each of at least three selected colors of light in the visible portion of the spectrum.

8. The control device of claim 1, wherein the control unit further comprises an algorithm configured to correlate the value of the signal received from the wireless module to include the CCT value and the D_uvAt least one of the values is associated with a corresponding value.

9. The control device of claim 1, wherein the control unit further comprises a look-up table (LUT) to correlate values of the signal received from the wireless module to include the CCT value and the D_uvAt least one of the values is associated with a corresponding value.

10. The control device of claim 1, wherein the LED array is a multi-color array comprising a plurality of LEDs of different colors.

11. The control device of claim 10, wherein the colors of the LEDs in the multicolored array of LEDs include at least one red LED, at least one green LED, and at least one blue LED.

12. The control device of claim 10, wherein the multicolored array of LEDs comprises at least one down-saturated red LED, at least one down-saturated green LED, and at least one down-saturated blue LED.

13. The control device of claim 1, wherein the control unit is further configured to supply a Pulse Width Modulation (PWM) time-slicing signal to at least two of the tri-color sets of LEDs within the array of LEDs, the at least two of the tri-color sets of LEDs being based at least in part on a value of a desired value of CCT.

14. The control device of claim 1, wherein the control unit is further configured to supply a Pulse Width Modulation (PWM) time-slicing signal to at least two of the tri-color groups of LEDs within the LED array, the at least two of the tri-color groups of LEDs based at least in part on a desired D_uvThe value of (c).

15. The control device of claim 1, wherein the control unit is further configured to supply a Pulse Width Modulation (PWM) time-slicing signal to the LED array based at least in part on a desired luminous flux level of the LED array.

16. The control device of claim 1, wherein the control unit further comprises at least one translation mechanism comprising a mechanism of an algorithm and a look-up table (LUT), the translation mechanism configured to associate values of the signal received from the wireless module with corresponding values of the luminous flux level of the LED array.

17. The control device of claim 1, wherein the D determined by the control unit_uvThe distance is on the isotherm with a constant CCT value.

18. A method of color tuning a Light Emitting Diode (LED) array, the method comprising:

receiving a wireless signal at a wireless module, the wireless signal including a distance value (D) from a Black Body Line (BBL) containing a Correlated Color Temperature (CCT) value and a temperature of the LED array_uv) At least one of the signals of (a);

receiving, at a control unit, one or more signals from the wireless module, the one or more signals based on the wireless signal from the wireless control device;

translating, by the control unit, the one or more signals into one or more translated signals;

controlling, by the control unit, a dimmer emulator to provide one or more control signals to an LED driver, the one or more control signals being dependent on the one or more translated signals; and

receiving power at the control unit from the LED drivers of the LED array based on the one or more control signals.

19. The method of claim 18, wherein:

the dimmer emulator comprises a current source, an adjustable voltage reference coupled to the current source, a transistor coupled to the adjustable voltage reference, and a resistive voltage divider coupled to the current source and to the transistor, and

the method further includes adjusting the adjustable voltage reference to alter a variable division ratio of the resistive voltage divider.

20. The method of claim 19, wherein:

the resistive voltage divider includes a first resistor coupled in series to a first end of a second resistor and a first end of a third resistor, each of the second and third resistors coupled on their respective second ends to opposite sides of the transistor, and

the method further includes controlling operation of the transistor by applying a Pulse Width Modulation (PWM) signal to a signal line coupled to a gate of the transistor.

21. The method of claim 18, further comprising correlating a value of the signal received from the wireless module at the control unit including the CCT value and the D using a look-up table (LUT)_uvAt least one of the values is associated with a corresponding value.

22. A wireless Light Emitting Diode (LED) control apparatus, the apparatus comprising:

an LED array having at least one down-saturated red LED, at least one down-saturated green LED, and at least one down-saturated blue LED;

a wireless module configured to receive a wireless signal from a wireless control device, the received wireless signal including a desired distance value (D) from a Black Body Line (BBL) containing a desired Correlated Color Temperature (CCT) value and a temperature of the LED array_uv) At least one of the signals of (a), the CCT and the D_uvEach of the values is selected by a user of the wireless control device;

23. The wireless LED control device of claim 22, wherein the desired D from the BBL_uvThe distance is configured to adjust an overall color shift of the LED array along an isothermal CCT line corresponding to the desired color temperature.

24. The wireless LED control device of claim 22, wherein the LED array has a Color Rendering Index (CRI) greater than about 90.

25. The wireless LED control device of claim 22, wherein the LED array is configured to have a color temperature range from about 2700K to about 6500K.