TW202102057A - User control modality for led color tuning - Google Patents

Abstract

Various embodiments include apparatuses and methods enabling a control apparatus for color tuning a light-emitting diode (LED) array. In one example, a controllable-lighting apparatus includes an LED array having at least one desaturated red LED, at least one desaturated green LED, and at least one desaturated blue LED. A number of color-tuning and luminous-flux control devices includes an adjustable correlated color temperature (CCT)-control device for setting a desired color temperature of the LED array, an adjustable D_uv -control device for setting a desired overall color cast of the LED array along an isothermal CCT line corresponding to the desired color temperature, and an adjustable flux-control device for setting a desired luminous-flux value of the LED array. Other apparatuses and methods are described.

Description

User control mode of LED color tuning

The subject matter disclosed herein relates to color tuning including one or more light emitting diodes (LEDs) or LED arrays that operate substantially in the visible portion of the electromagnetic spectrum. More specifically, the disclosed subject matter relates to a technology for enabling two color tuning devices and a luminous flux device to control the two parameters of the color temperature and a brightness level of an LED array.

Light-emitting diodes (LEDs) are often used in various lighting operations. The color appearance of an object is determined in part by the spectral power density (SPD) of the light that illuminates the object. For humans watching an object, SPD is the relative intensity of various wavelengths in the visible spectrum. However, other factors can also affect the color appearance. Furthermore, a correlated color temperature (CCT) of the LED and the distance between the LED temperature on the CCT and a black body line (BBL, also called black body locus or Planck locus) can affect a human's perception of an object. In particular, there is a large market demand for LED lighting solutions in retail and hospitality lighting applications, where it is desired to control both a color temperature and a brightness level of the LED.

There are currently two main technologies for color tuning (for example, white tuning) of LEDs. A first technology is based on two or more CCT white LEDs. The second technique is based on one combination of red/green/blue/amber. The first technology does not have the ability to tune one of the LEDs in the _Duv direction at all. In the second technology, color tuning capability is rarely provided as a usable function. In these cases, it is usually based on red-green-blue (RGB) or hue-saturation-luminance (HSL) models instead to provide users with a color wheel. However, the RGB and HSL models are not designed for general lighting. Both RGB and HSL models are more suitable for graphics or photography applications.

The information described in this section is provided to provide those familiar with the technology with one of the background content of the subject matter disclosed below and should not be regarded as recognized prior art.

In one embodiment, a control device for color tuning a light emitting diode (LED) array includes: a correlated color temperature (CCT) control device configured to be adjusted by an end user A desired color temperature of an LED array, the CCT control device is further configured to generate an output signal corresponding to the desired color temperature; a Duv control device, which is configured to be adjusted by an end user to a distance from the LED array A black body line (BBL) a desired Duv distance, the Duv control device is further configured to generate an output signal corresponding to the desired Duv distance from the BBL; a flux control device, which is configured to be The end user adjusts to a desired luminous flux value of the LED array, the flux control device is further configured to generate an output signal corresponding to the desired luminous flux value; and a controller box, which includes a device for supplying current to One of the LED drive circuits of at least two colors of LEDs in the LED array. The controller box is configured to receive output signals corresponding to the desired color temperature, the desired Duv distance from the BBL, and the desired luminous flux value, and make the relevant It is determined which of the at least two color LEDs receives the current.

In another embodiment, a controllable lighting device includes: an LED array having at least one desaturated red LED, at least one desaturated green LED, and at least one desaturated blue LED; and color tuning and luminous flux control A device comprising: a correlated color temperature (CCT) control device configured to be adjusted by an end user to a desired color temperature of the LED array, and the CCT control device is further configured to generate a color temperature corresponding to the desired color temperature An output signal; a Duv control device, which is configured to be adjusted by an end user to a desired Duv distance from a black body line (BBL) of the LED array, the Duv control device is further configured to generate a corresponding An output signal at the desired Duv distance from the BBL; and a flux control device configured to be adjusted by an end user to a desired luminous flux value of the LED array, the flux control device is further configured To generate an output signal corresponding to the desired luminous flux value.

In another embodiment, a method for setting the parameters of a multi-color LED array includes: for each of a correlated color temperature (CCT) output signal, a Duv output signal, and a flux output signal: The CCT output signal, the Duv output signal, and the flux output signal are respectively related to a color temperature value, a Duv distance from a black body line (BBL) value, and a luminous flux value; each of the related values is sent to A controller that controls a color temperature and intensity level of the multi-color LED array; and controls the amount of current delivered to the LEDs of at least two colors in the multi-color LED array.

This application claims the U.S. Provisional Application No. 62/849,229 filed on May 17, 2019 and titled ``A USER CONTROL MODALITY FOR ILLUMINATION BASED ON CCT, DUV, AND DIMMING'', filed on June 28, 2019 and titled Priority for the U.S. Application No. 16/457,130 for "USER CONTROL MODALITY FOR LED COLOR TUNING" and the European Application No. 19205102.7 filed on October 24, 2019 and titled "USER CONTROL MODALITY FOR LED COLOR TUNING", The full contents of the disclosures of these cases are incorporated herein by reference.

The disclosed subject matter will now be described in detail with reference to several general and specific embodiments as shown in each of the accompanying drawings. In the following description, numerous specific details are explained in order to provide a thorough understanding of one of the disclosed objects. However, it will be obvious to those familiar with the art that the disclosed subject matter can be practiced without some or all of these specific details. In other cases, well-known program steps or structures are not described in detail so as not to obscure the disclosed subject matter.

In the following, examples of different lighting systems and/or light-emitting diode implementations will be described more fully with reference to the accompanying drawings. These examples are not mutually exclusive, and features found in one example can be combined with features found in one or more other examples to achieve additional implementations. Accordingly, it will be understood that the examples shown in the accompanying drawings are provided for illustrative purposes only and they are not intended to limit the present invention in any way. Throughout the text, similar numbers generally refer to similar elements.

In addition, 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 can be used to distinguish one element from another element. For example, without departing from the scope of the disclosed subject matter, a first element can be referred to as a second element and a second element can be referred to as a first element. As used herein, the term "and/or" can 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, the element can be directly connected or coupled to the other element and/or connected or coupled to the other element through one or more intervening elements. One element. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intervening element between the element and the other element. It will be understood that these terms are intended to cover different element orientations in addition to any of the orientations depicted in the figures.

Relative terms such as "below", "above", "above", "below", "horizontal" or "vertical" can be used herein to describe one element, zone or area relative to another element, zone or zone One relationship, as shown in the figure. It will be understood that these terms are intended to cover different device orientations other than the one depicted in the figures. In addition, whether LEDs, LED arrays, electrical components, and/or electronic components are accommodated on one, two or more electronic boards may also depend on design constraints and/or a specific application.

Semiconductor-based light-emitting devices or optical power emitting devices, such as devices emitting ultraviolet (UV) or infrared (IR) optical power, are one of the most effective 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 as LEDs in this text). Due to their compact size and low power requirements, LEDs may be attractive candidates for many different applications. For example, LEDs can be used as light sources (for example, flashlights and camera flashes) for handheld battery-powered devices such as cameras and cellular phones. LEDs can also be used for automotive lighting, head-up display (HUD) lighting, garden lighting, street lighting, a video flashlight, general lighting (for example, home, shop, office and studio lighting, theater/stage lighting and architectural lighting), expansion Augmented reality (AR) lighting, virtual reality (VR) lighting (as the backlight of the display) and IR spectrum. A single LED can provide light that is no brighter than an incandescent light source, and therefore, multi-junction devices or LED arrays (such as monolithic LED arrays, micro LED arrays, etc.) can be used in applications where enhanced brightness is desired or required.

In various environments where LED-based lamps (or related lighting devices) are used to illuminate objects and are used for general lighting, in addition to controlling the relative brightness (e.g., luminous flux) of one of the LED-based lamps (or individual lamps), It may be desirable to control the color temperature of the lamps. Such environments may include, for example, retail locations and entertainment locations, such as restaurants and the like. In addition to CCT, another lamp measurement is the color rendering index (CRI) of the lamp. CRI is defined by the International Commission on Illumination (CIE) and provides a quantitative measurement of the ability of any light source (including LED) to accurately represent the color of various objects compared with an ideal or natural light source. The highest possible CRI value is 100. Another quantitative indicator is D _uv . D _uv is an index defined in CIE 1960, for example, to indicate the distance from a color point to the BBL. If the color point is higher than BBL, D _uv is a positive value and if the color point is lower than BBL, D _uv is a negative value. The color point higher than BBL appears green and the color point lower than BBL appears pink. The disclosed subject matter provides a device for controlling a color temperature (CCT and D _uv ) and a brightness level of the lamp. As described herein, in color tuning applications, color temperature is related to both CCT and _Duv .

Therefore, the disclosed subject matter is intended to be used to drive LEDs of various colors (including, for example, primary colors (red-green-blue or RGB) LEDs or desaturated (pastel) RGB color LEDs) to produce various color temperatures and a high Color rendering index (CRI) and high-efficiency lamps, especially color tuning (covering both CCT and D _uv ) and luminous flux (for example, "brightness level") solutions to solve the color mixing problem of using phosphors to convert color LEDs.

AS is known in the related art, the forward voltage of a direct color LED decreases as the dominant wavelength increases. These LEDs can be driven using, for example, a multi-channel DC-to-DC converter. Advanced phosphor-converted color LEDs for high efficiency and CRI have been created to provide new possibilities for correlated color temperature (CCT) tuning applications. Some advanced color LEDs have desaturated color points and can be mixed to have a white color of 90+ CRI in a wide CCT range. Other LEDs with 80+ CRI implementation or even 70+ CRI implementation 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 in this article is compatible with a single-channel constant current driver to promote market adoption.

As known by ordinary people, since the light output of an LED is proportional to the amount of current used to drive the LED, dimming an LED can be achieved, for example, by reducing the forward current delivered to the LED. In addition to or instead of changing the amount of current used to drive each of several individual LEDs, a controller box (described in detail below with reference to Figure 5) can be in the "on" state and the "off" state. Quickly switch the selected LED to achieve a proper dimming level and color temperature of the selected lamp.

Generally, an analog driver method or a pulse width modulation (PWM) driver method is used to form the LED driving circuit. In an analog drive method, all colors are driven simultaneously. Each LED is independently driven by providing a different current for each LED. The analog driver causes a color shift and there is currently no way to shift the current into one of three ways. Analog driving often results in driving a specific color LED to a low current mode and other times to a very high current mode. This wide dynamic range poses a challenge to the sensing and control hardware.

In a PWM driver, each color is turned on sequentially at high speed. Each color is driven with the same current. Control the mixed color by changing the working cycle of each color. That is, one color can be driven for twice as long as another color to add to the mixed color. Since human vision cannot perceive very rapidly changing colors, light seems to have only a single color.

For example, a first LED (of a first color) is periodically driven with a current for a predetermined amount of time, and then a first LED (of a second color) is periodically driven with the same current for a predetermined amount of time. Two LEDs, and then a third LED (of 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 can be controlled by changing the working cycle of each color. For example, if you have an RGB LED and expect a specific output, based on the perception of the human eye, you can drive red for one part of the cycle, green for a different part of the cycle, and blue for another part of the cycle. Drive the red LED with the same current in a short period of time instead of driving the red LED with a lower current. This example demonstrates the shortcomings of PWM: LEDs are poorly used, which results in inefficient use of one of the power. 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 desaturated RGB method can generate tunable light on and outside the BBL, and simultaneously generate tunable light on the BBL (an isothermal CCT line (as described below)) Maintain a high CRI. In contrast, various other prior art systems utilize a CCT method in which the tunable color point falls on a straight line between the two primary colors of the LED (for example, R-G, R-B, or G-B).

Figure 1 shows a part of the International Commission on Illumination (CIE) color table 100, including a black body line (BBL) 101 (also known as Planck) that forms a basis for understanding various embodiments of the subject matter disclosed herein Trajectory). BBL 101 displays the chromaticity coordinates of blackbody radiators with varying temperatures. It is generally agreed that in most lighting situations, the light source should have chromaticity coordinates located 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 Correlated Color Temperature (CCT). The D _uv value provides a useful and complementary way to further describe the chromaticity. The D _uv value is one of the chromaticity coordinates of a lamp above BBL 101 (a positive D _uv value) or below BBL 101 (a negative D _uv value) One degree indication.

The color table part is shown as containing several isotherms 117. Even if each of these contours is not on the BBL 101, any color point on the isotherm 117 has a constant CCT. For example, a first isotherm 117A has a CCT of 10,000 K, a second isotherm 117B has a CCT of 5,000 K, a third isotherm 117C has a CCT of 3,000 K, and a fourth isotherm Line 117D has a CCT of 2,200 K.

Continuing to refer to FIG. 1, the CIE color table 100 also shows several ellipses representing a mark ellipse (MAE) 103, which is located at the center of BBL 101 and extends from BBL 101 by one step 105 and three steps in distance 107. Five steps 109 or seven steps 111. The MAE is based on psychological research and defines a region on the CIE chromaticity diagram that contains all colors that a typical observer cannot distinguish from the color at the center of the ellipse. Therefore, each of the MAE steps 105 to 111 (one step to seven steps) is regarded by a typical observer as substantially the same color as a color at the center of each of the MAE 103. A series of curves 115A, 115B, 115C, and 115D represent substantially equal distances from BBL 101 and are respectively related to D _uv values such as +0.006, +0.003, 0, -0.003, and -0.006.

Referring now to Figure 2A and continuing to refer to Figure 1, Figure 2A shows a chromaticity diagram 200 with a red (R) LED at coordinates 205, a green (G) LED at coordinates 201, and a blue (G) LED at coordinates 203 ( B) The approximate chromaticity coordinates of the color of the typical coordinate value of the LED (as indicated on the xy scale of the chromaticity diagram 200). Figure 2A shows an example of a chromaticity diagram 200 for defining the wavelength spectrum of a visible light source according to some embodiments. The chromaticity diagram 200 of FIG. 2A is only a way to define a wavelength spectrum of a visible light source; other suitable definitions are known in the art and can also be implemented with the disclosed subject matter described herein. Examples are used together.

A convenient way to specify a part of the chromaticity diagram 200 is through a set of equations in the x-y plane, where each formula has a locus of a solution that defines a line on the chromaticity diagram 200. The lines can intersect to specify a specific area, as described in more detail below with reference to FIG. 2B. As an alternative definition, a white light source may emit light corresponding to light from a black body light 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, and 205 is the CCT coordinate of the respective green, blue and red "fully saturated" LEDs. However, if a "white light" is generated by combining R, G, and B LEDs with a specific ratio, the CRI of this combination will be extremely low. Generally, in the environments described above, such as retail or hospitality establishments, a CRI of about 90 or higher is desired.

FIG. 2B shows a modified version of the chromaticity diagram 200 of FIG. 2A with the approximate chromaticity coordinates of the desaturated R, G and B LEDs close to BBL according to various embodiments of the disclosed subject matter, desaturated R, G and The B LED has a color rendering index (CRI) of approximately 90+ and within a defined color temperature range.

However, the chromaticity diagram 250 of FIG. 2B shows the approximate chromaticity coordinates of the desaturated (pastel) R, G, and B LEDs close to the BBL 101. Display the coordinate values of a desaturated red (R) LED at coordinates 255, a desaturated green (G) LED at coordinates 253, and a desaturated blue (B) LED at coordinates 251 (as shown in the chromaticity diagram 250 Pointed out on the xy scale). In various embodiments, the color temperature range of one of the desaturated R, G, and B LEDs may be in a range from about 1800 K to about 2500 K. In other embodiments, the desaturated R, G, and B LEDs may be in a color temperature range of, for example, about 2700 K to about 6500K. In still other embodiments, the desaturated R, G, and B LEDs may be within a color temperature range of about 1800 K to about 7500 K. In still other embodiments, the desaturated R, G, and B LEDs can be selected to be in a wide color temperature range. As noted above, 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). Therefore, CRI is a quantitative measure of the ability of a light source to faithfully reveal the colors of various objects compared with an ideal or natural light source.

In a specific example embodiment, a triangle 257 formed between each of the coordinate values of the desaturated R, G, and B LEDs is also shown. Desaturated R, G, and B LEDs are formed (for example, by a mixture of phosphors and/or a mixture of materials forming LEDs as known in the art) to have coordinate values close to BBL 101. Therefore, the coordinate positions of the respective desaturated R, G, and B LEDs, as outlined by triangle 257, have a CRI of approximately 90 or greater and an approximate tunable color temperature range of, for example, about 2700 K to about 6500 K. Therefore, a correlated color temperature (CCT) can be selected in the color tuning application described herein so that all combinations of the selected CCT result in a lamp with a CRI of 90 or greater. Each of the desaturated R, G, and B LEDs can form a single LED or an LED array (or group), where each LED in the array or group has the same or similar characteristics as other LEDs in the array or group One desaturates the color. One or more desaturated R, G, and B LEDs are combined to form a lamp.

Figure 2C shows a revised version of the chromaticity diagram 200 of Figure 2A with the approximate chromaticity coordinates of the desaturated R, G, and B LEDs close to BBL according to various embodiments of the disclosed subject matter, desaturated R, G and The B LED has a color rendering index (CRI) of approximately 80+ and is wider than the defined color temperature range of one of the desaturated R, G, and B LEDs of FIG. 2B.

However, the chromaticity diagram 270 of FIG. 2C shows the approximate chromaticity coordinates of the desaturated R, G, and B LEDs that are disposed farther from the BBL 101 than the desaturated R, G, and B LEDs of FIG. 2B. For one of the desaturated red (R) LED at coordinates 275, one of the desaturated green (G) LEDs at coordinates 273, and one of the desaturated blue (B) LEDs at coordinates 271, 271 displays the coordinate values (as shown in the chromaticity diagram). Pointed out on the xy scale of 270). In various embodiments, the color temperature range of one of the desaturated R, G, and B LEDs may be in a range from about 1800 K to about 2500 K. In other embodiments, 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 within a color temperature range of about 1800 K to about 7500 K.

In a specific example embodiment, a triangle 277 formed between each of the coordinate values of the desaturated R, G, and B LEDs is also shown. Desaturated R, G, and B LEDs are formed (for example, by a mixture of phosphors and/or a mixture of materials forming LEDs as known in the art) to have coordinate values close to BBL 101. Therefore, the coordinate positions of the respective desaturated R, G, and B LEDs, as outlined by triangle 277, have a CRI of approximately 80 or greater and an approximate tunable color temperature range, for example, from about 1800 K to about 7500 K. Since the color temperature range is larger than the range shown in FIG. 2B, the CRI is commensurately reduced to about 80 or more. However, ordinary skilled artisans will recognize that desaturated R, G, and B LEDs can be generated to have individual color temperature ranges anywhere in the chromaticity diagram. Therefore, a correlated color temperature (CCT) can be selected in the color tuning application described herein so that all combinations of the selected CCT result in a lamp with a CRI of 80 or greater. Each of the desaturated R, G, and B LEDs can form a single LED or an LED array (or group), where each LED in the array or group has the same or similar characteristics as other LEDs in the array or group One desaturates the color. One or more desaturated R, G, and B LEDs are combined to form a lamp.

FIG. 3 shows a color tuning device 300 of the prior art that requires a separate flux control device 301 and a separate CCT control device 303. The flux control device 301 is coupled to the single channel driver circuit 305 and the CCT control device is coupled to a combined LED drive circuit/LED array 320. The combined LED driving circuit/LED array 320 can 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 a customer facility 310 and all devices must be installed with applicable national and local regulations governing high-voltage circuits. The combined LED driving circuit/LED array 320 is usually located at the far end of the customer facility 310. Therefore, both the initial purchase price and the installation price can be high.

FIG. 4 shows a color tuning device 400 that uses a single control device 401, one of the prior art. A single control device 401 is coupled to a single-channel driver circuit 403, both of which are in a customer installation area 410. The single-channel driver circuit 403 is coupled to a combined LED driver circuit/LED array 420. The combined LED driving circuit/LED array 420 is usually located at the far end of the customer installation area 410 (but usually still in a customer facility). The color tuning device 400 uses a single device to control both light flux (and light intensity) and color temperature. As the luminous flux (intensity) of the LED array decreases, the color temperature of the LED array also decreases. On the contrary, as the intensity of the LED array increases, the color temperature of the LED array also increases.

Referring now to FIG. 5, there is shown a color tuning and luminous flux control device 550, a controller box 530, a plurality of control switches 520 (for example, a multiplexer array) according to various embodiments of the disclosed subject matter, and including, for example, FIG. 2B And an example of a high-level schematic diagram 500 of a desaturated LED array 510 of a desaturated LED of FIG. 2C. The LED array 510 is shown as containing desaturated LEDs, such as (an "R" LED 511, a "G" LED 513, and a "B" LED 515), although the high-level schematic 500 is not necessarily limited to these colors. The reality is that these colors are presented to make it easier to understand the various novel features of the disclosed subject matter. The “R” LED 511, the “G” LED 513 and the “B” LED 515 constitute an LED array 510 (for example, a lamp). Furthermore, each of the "R" LED 511, the "G" LED 513, and the "B" LED 515 can be composed of one or more LEDs with appropriately desaturated colors (for example, R, G, or B). Since the LED array 510 includes, for example, an "R" LED 511 color, a "G" LED 513 color, and a "B" LED 515 color, the LED array 510 can be regarded as a multi-color LED array.

As known by the ordinary artisan, since the light output of an LED is proportional to the amount of current used to drive the LED, dimming an LED can be achieved by, for example, reducing the forward current delivered to the LED. The controller box 530 reads the converted signal transmitted from the color tuning and luminous flux control device 550 (for example, an analog-to-digital converter 531 (A/D converter or ADC) converts an analog signal to a digital signal) and A predetermined amount of current is sent to one, two, or all three LEDs to change the overall CCT and/or D _uv level of one of the LED arrays 510.

In addition to changing the amount of current used to drive each of the "R" LED 511, "G" LED 513, and "B" LED 515, or instead of changing the amount of current used to drive the "R" LED 511, "G" LED 513 and "B" LED 515 are each one of the current, the controller box 530 can be based on the desired intensity as indicated by an end user setting a desired brightness level on the flux control device 555, in The selected LED is quickly switched between the "on" state and the "off" state to achieve an appropriate dimming level for the selected lamp. In an embodiment, the controller box 530 may be a three-channel converter known in the art. After reading and understanding the disclosed subject matter, ordinary technicians will recognize that the individual LEDs constituting the LED array 510 can also be controlled in other ways.

According to various embodiments of the disclosed subject matter, the color tuning and luminous flux control device 550 includes three separate devices (although they can be physically grouped into a single device), including a CCT control device 551 and a D _uv control device 553 and a flux control device 555. One or more of the three devices may include an electrical control device, a mechanical control device, or a software control device (described in more detail with reference to FIG. 6). These control devices can be based on analog or digital signals. If one or more of these devices are based on an analog output, the controller box 530 includes an analog to digital converter (ADC) 531. In various embodiments, one or more of the control devices may include a voltage divider. In other embodiments, one or more of the control devices include various types of capacitive or resistive coupling current or voltage output devices known in the art. All three devices can include the same type of control device or various types of control devices.

For example, in a specific example embodiment, one or more of the CCT control device 551, the D _uv control device 553, and the flux control device 555 may be adapted to be used as one of the one-dimensional controls 0 volts to 10 volts Dimmer device. As known in the art, 0 to 10 volt dimmer devices are traditionally used for flux dimming. For example, a rotary or linear potentiometer or a position of a rheostat can be used to output a signal in the range of (inclusive) 0 volts to (inclusive) 10 volts.

In other embodiments, each of the CCT control device 551, the D _uv control device 553, and the flux control device 555 may be electrically based or mechanically based. These devices can be analog or digital. In some embodiments, these devices can be realized by physical knobs, dials, sliders, scroll wheels, toggle switches, and/or various equivalents thereof. In another embodiment, the CCT control device 551, the D _uv control device 553, and the flux control device 555 can be implemented as, for example, a resistive/capacitive touch panel with or without an integrated display. This embodiment is described in more detail below with reference to FIG. 6.

)。接著，控制器盒530繼續發送信號以「接通」及「關斷」控制開關520以依-0.003之一D _uv 調整達成6350 K之色溫。然而，現在發送至LED陣列510之電流之總值現為可用之最大操作電流之57%。在各項實施例中，該演算法判定CCT控制器件551、D _uv 控制器件553及通量控制器件555之各者與其等各自演算法輸出值成單調關係(一一對應)。An algorithm can be used to accept the output signal (for example, in analog or digital form) and transform the output signal into one of three control signals. For example, the algorithm can correlate the 9.7 V output signal from one of the CCT control devices 551 with the 6350 K color temperature of one of the LED arrays 510. The controller box 530 described in more detail below then sends a signal to quickly and continuously "turn on" or "off" each of the control switches 520 521, 523, 525 so that a human observer perceives the LED array 510 as emitting 6350 K A color temperature (for example, a mixture of mainly green and blue light). At substantially the same time, the algorithm can make a 4.0 V output signal from the D _uv control device 553 and a negative D _uv value of -0.003, or slightly lower than the BBL 101 in Figure 1, along the isothermal CCT of 6350 K The line is related to a slightly pink value, as discussed above. Therefore, the controller box 530 sends a signal again to quickly and continuously "turn on" or "turn off" each of the control switches 520 521, 523, 525 so that a human observer perceives the LED array 510 as emitting a color temperature of 6350 K , But now has a slight pinkish color cast. Finally, the algorithm can correlate a 5.7 V output signal from the flux control device 555 with an intensity level of the LED array 510 to have an intensity level of 57% of the full brightness (in this example, the controller box The 530 receives 5.7 volts from a device with a maximum output voltage of 10 volts or

). Then, the controller box 530 continues to send signals to "turn on" and "turn off" the control switch 520 to adjust the color temperature of 6350 K according to a D _{uv of} -0.003. However, the total value of the current sent to the LED array 510 is now 57% of the maximum operating current available. In various embodiments, the algorithm determines that each of the CCT control device 551, D _uv control device 553, and flux control device 555 has a monotonic relationship (one-to-one correspondence) with their respective algorithm output values.

In other embodiments, an output signal may be correlated with a look-up table (LUT) to transform the output signal into one of three control signals. In these embodiments, the controller box 530 can be used to receive and read the output signal (for example, in analog or digital form) and convert the output signal into one of three control signals. For example, the controller box 530 receives a 3.5 V output signal from the CCT control device 551. The LUT indicates that the 3.5 V output signal corresponds to a 3400 K color temperature of one of the LED arrays 510. As pointed out above with reference to the algorithm embodiment, the controller box 530 then sends a signal to quickly and continuously "turn on" or "turn off" each of the control switches 520 521, 523, and 525 so that a human observer turns the LED array 510 on Perceived to emit a color temperature of 3400 K (for example, a mixture of mainly green and red light). Substantially simultaneously with receiving and reading a value of the output signal from the CCT control device 551, an output signal of, for example, 8.5 V from the D _uv control device 553 may be positively correlated with a D _uv value of +0.006 in the LUT. The relative D _uv value of +0.006 is slightly higher than that of BBL 101 in Fig. 1, along the isothermal CCT line of 3400 K, and now has a slightly green value, as discussed above. Therefore, the controller box 530 sends a signal again to quickly and continuously "turn on" or "turn off" each of the control switches 520 521, 523, 525 so that a human observer perceives the LED array 510 as emitting a color temperature of 3400 K , But now has a slight green cast. Finally, the LUT can correlate the 10.0 V output signal from one of the flux control devices 555 with an intensity level of the LED array 510 to have an intensity level of 100% of the full brightness. Furthermore, as described in the above algorithm embodiment, the controller box 530 continues to send signals to "turn on" and "turn off" the control switch 520 to adjust to a color temperature of 3400 K according to D _{uv which is} one of +0.006. However, the total value of the current sent to the LED array 510 is now 100% of the maximum operating current available. In various embodiments, the look-up table is configured to determine that each of the CCT control device 551, the D _uv control device 553, and the flux control device 555 has a monotonic relationship (one-to-one correspondence) with their respective LUT output values.

Therefore, in the LUT embodiment, each of the signals received and read from the CCT control device 551, the D _uv control device 553, and the flux control device 555 starts in a manner similar to the one described above with reference to the algorithm embodiment. effect. The difference is that the look-up table embodiment receives the voltage signal, and then consults a LUT for driving the "R" LED 511, the "G" LED 513 and the "B" LED 515 in the LED array 510, which corresponds to the CCT color temperature. , D _uv value or dimming value, instead of applying the received voltage signal to an algorithm. In each embodiment, the algorithm embodiment and the LUT embodiment can be used at the same time. For example, the output signals from the CCT control device 551 and the _Duv control device 553 can function and correlate under the algorithm embodiment, and the output signals from the flux control device 555 can function and correlate under the LUT embodiment.

Each of the algorithm embodiment and the LUT embodiment can be executed using, for example, one or more microcontrollers (not shown) or other device types described below (eg, hardware, firmware, and/or software devices). Various device types can be defined as modules. As noted above, one or more microcontrollers of the module may be embedded in, for example, the controller box 530, or included in each of the CCT control device 551, the D _uv control device 553, and the flux control device 555 , Or in a microcontroller placed close to the control device (for example, adjacent to an electrical box or in a separate box adjacent to the electrical box that houses the control device). A controller box 530 is described below with reference to FIG. 5.

In addition, some or all of these modules may be included in the controller box 530. In some embodiments, the modules may also include software-based modules (for example, code stored or otherwise embodied in a machine-readable medium or a transmission medium), hardware modules, or the like Any suitable combination. A hardware module is a tangible (for example, non-transitory) physical component (for example, a set of one or more microcontrollers or a set of one or more microcontrollers or Microprocessor or other hardware-based devices). One or more modules can be configured or configured in a specific physical manner. In various embodiments, one or more microcontrollers or microprocessors or one or more hardware modules thereof can be configured as a hardware module by software (for example, an application program or part thereof). The hardware module operates to perform the operations described in this article for that module.

In some example embodiments, a hardware module may be implemented, for example, mechanically or electronically or by any suitable combination thereof. For example, a hardware module may include dedicated circuits or logic that are permanently configured to perform specific operations. A hardware module can be or include a dedicated processor, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). A hardware module can also include programmable logic or circuits, which are temporarily configured by software to perform specific operations, such as self-color tuning and luminous flux through an algorithm or the LUT described above The output signal received by the control device 550 is interpreted as a specific CCT, D _uv or flux value. As an example, a hardware module may include software included in a CPU or other programmable processors. It will be understood that cost and time can be considered to drive the decision to implement a hardware module mechanically, electrically, in a dedicated and permanently configured circuit, or in a temporarily configured circuit (for example, by software configuration).

In various embodiments, the controller box 530 may include a hybrid LED driving circuit for CCT and _Duv tuning. The hybrid driving circuit may include an LED driver for generating a stable LED driver current. Therefore, the hybrid driving circuit supplies current to at least two of the “R” LED 511, the “G” LED 513, and the “B” LED 515 constituting the LED array 510. In a particular example embodiment, the control switch 520 delivers current to the appropriate LED based on, for example, the desired CCT and _Duv tuning. Then, the hybrid driving circuit in the controller box 530 can be overlapped with PWM time division to guide the current to at least two of the “R” LED 511, the “G” LED 513 and the “B” LED 515 constituting the LED array 510.

In various embodiments, the controller box 530 and/or the microcontroller (or other modules) described above can be configured to have a special calibration mode. This calibration mode can work with algorithms (although the user may need to access the underlying software or firmware to change the value) or the value in the LUT. For example, if the controller box 530 performs a power cycle in a special sequence (for example, a combination of long and short power-on/power-off cycles), the controller box 530 can enter the calibration mode. In this calibration mode, the user (for example, a calibration technician in the factory or an advanced end user) is required to change the relevant values of the output signals of the three control devices to their respective control values (CCT, D _uv and Flux). Then, the controller box 530 stores the two algorithms or values in software or hardware (for example, a programmable gate array (FPGA)) in an internal memory or firmware (for example, an EEPROM) . Internal memory can take several forms, including, for example, electrically erasable and programmable read-only memory (EEPROM), phase change memory (PCM), flash memory, or various other types of non-volatile memory known in the art Sexual memory pieces.

FIG. 6 shows an exemplary embodiment of the color tuning and luminous flux control device 550 of FIG. 5 implemented on a display screen 600 according to various exemplary embodiments of the disclosed subject matter. In this example, the display screen 600 displays a first channel 610 for controlling the D _uv distance from the BBL of the LED array 510 (see, for example, FIG. 1), a second channel 620 for controlling the CCT of the LED array 510, and A third channel 630 used to control the luminous flux (intensity) of the LED array 510. Each of these channels may be a separate part of the same display screen 600 or may include three separate parts that make up the display screen 600 when combined.

A first passage 611 and 610 includes for reducing one from the BBL for increasing the distance D _uv second button 613 to control the tuning of the color of the LED array 510 D _uv portion of one of the values from the BBL distance D _uv first button . The value selected for D _uv can then be displayed on a D _uv display portion 615.

The second channel 620 includes a first button 621 for decreasing the value of CCT and a second button 623 for increasing the value of the selected CCT to control the CCT part of the LED array 510. The value selected for CCT can then be displayed on a CCT display portion 625 of the display screen 600.

The third channel 630 includes a first button 631 for reducing the value of the luminous flux (intensity or brightness level of the LED array 510) and a second button 633 for increasing the value of the luminous flux of the LED array 510. Then, the selected value of the luminous flux can be displayed on a luminous flux display part 635 of the display screen 600.

As those of ordinary skill will understand, in some embodiments, some or all of the buttons 611, 613, 621, 623, 631, 633 may include “soft buttons” implemented on a touch-sensitive version of the display screen 600, for example. In other embodiments, some or all of the buttons 611, 613, 621, 623, 631, 633 may include hardware-implemented buttons formed in the display screen 600 (for example, a momentary contact switch or other types of hardware-based switches). ). In other embodiments, some or all of the buttons 611, 613, 621, 623, 631, 633 may include hardware-implemented buttons such as the capacitance-based portion of the display screen 600. In still other embodiments, a combination of button types can be used.

Now referring to FIG. 7, an exemplary method for setting the parameters of CCT, D _uv and luminous flux of the LED array 510 of FIG. 5 is shown. The method starts in operation 701, where the start (or update, depending on whether any value from one or more of the CCT control device 551, D _uv control device 553, and flux control device 555) parameter settings (CCT, D _uv and flux) initial value. Each of the three parameters that can be set for the LED array 510 includes a separate branch. A CCT branch 710 receives and reads input signals related to setting the CCT of the LED array 510 and correlates the CCT signal with instructions for the controller box 530. A D _uv branch 720 receives and reads input signals related to setting the D _{uv of the} LED array 510 and correlates the D _uv signal with instructions for the controller box 530. A flux branch 730 receives and reads input signals related to setting the flux of the LED array 510 and correlates the received flux signals with instructions for the controller box 530.

Referring now to the CCT branch 710, at operation 703, a CCT output signal is received and read from, for example, the CCT control device 551 (see FIG. 5) or the second channel 620 (see FIG. 6) of the display screen 600. At operation 705, the received CCT output signal is correlated with a desired color temperature indicating one of the settings from the CCT control device 551 or the second channel 620. As described above, in one embodiment, the correlation can occur by providing a value of the CCT output signal as an input to the CCT signal versus color temperature algorithm. In another embodiment, the correlation can occur by providing a value of the CCT output signal as an input to a lookup table. Next, at operation 707, the relevant output value from the algorithm or LUT is sent to the controller box 530 as a signal (for example, analog or digital). At operation 721, the signal is interpreted in the controller box 530 to substantially simultaneously send the appropriate current level and/or PWM signal to at least two of the three colors in the LED array 510 based on the received CCT output signal.

Referring now to the D _uv branch 720, at operation 709, a D _uv output signal is received and read from, for example, the D _uv control device 553 (see FIG. 5) or the first channel 610 (see FIG. 6) of the display screen 600. At operation 711, the received D _uv output signal is correlated with a desired D _uv value indicating one of the settings from the D _uv control device 553 or the first channel 610. As described above, in one embodiment, the correlation can occur by providing a value of the D _uv output signal as an input to an algorithm structure to correlate the D _uv signal with the D _uv distance from the BBL. In another embodiment, the correlation can occur by providing a value of the D _uv output signal as an input to a look-up table. Then, at operation 713, the relevant output value from the algorithm or LUT is sent to the controller box 530 as a signal (for example, analog or digital). At operation 721, the signal is interpreted in the controller box 530 to substantially simultaneously send the appropriate current level and/or the PWM signal to at least two of the three colors in the LED array 510 based on the received D _uv output signal .

In the flux branch 730 of the method 700, at operation 715, a flux output signal is received and read from, for example, the flux control device 555 (see FIG. 5) or the third channel 630 (see FIG. 6) of the display screen 600 . At operation 717, the received flux output signal is correlated with a desired luminous flux level indicating one of the settings from the flux control device 555 or the third channel 630. In one embodiment, the correlation can occur by providing a value of the flux output signal as an input to the luminous flux signal versus flux intensity algorithm. In another embodiment, the correlation can occur by providing a value of the flux output signal as an input to a lookup table. Then, at operation 719, the relevant output value from the algorithm or LUT is sent to the controller box 530 as a signal (for example, analog or digital). At operation 721, the signal is interpreted in the controller box 530 to send the appropriate current level and/or the PWM signal to at least two of the three colors in the LED array 510 substantially simultaneously based on the received flux output signal .

At operation 723, the method checks (eg, polls) for any new/revision signals from the color tuning and luminous flux control device 550 or the display screen 600. If one or more new signals are sensed at operation 725, the method starts again at operation 701.

After reading and understanding the disclosed subject matter, the ordinary skilled person will recognize that this method can be applied to traditional RGB color LEDs or desaturated RGB color LEDs. Those familiar with this technology will also recognize that LEDs with additional or fewer colors can be used.

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

In some example embodiments, a hardware module may be implemented, for example, mechanically or electronically or by any suitable combination thereof. For example, a hardware module may include dedicated circuits or logic that are permanently configured to perform specific operations. A hardware module can be or include a dedicated processor, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). A hardware module may also include programmable logic or circuits, which are temporarily configured by software to perform specific operations, such as interpreting various states and transitions in a finite state machine. As an example, a hardware module may include software included in a CPU or other programmable processors. It will be understood that cost and time can be considered to drive the decision to implement a hardware module mechanically, electrically, in a dedicated and permanently configured circuit, or in a temporarily configured circuit (for example, by software configuration).

The above description includes illustrative examples, devices, systems, and methods that embody the disclosed subject matter. In this description, for the purpose of explanation, numerous specific details are set forth in order to provide an understanding of various embodiments of the disclosed subject matter. However, it will be obvious to those skilled in the art that the various embodiments of the subject matter can be practiced without such specific details. In addition, well-known structures, materials, and techniques are not shown in detail so as not to obscure the illustrated embodiments.

As used herein, the term "or" can be interpreted in an inclusive or exclusive meaning. In addition, ordinary technicians will understand other embodiments after reading and understanding the provided disclosure content. In addition, after reading and understanding the disclosed content provided in this article, a person skilled in the art will easily understand that various combinations of the techniques and examples provided in this article can be applied in various combinations.

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

Therefore, it will be obvious to the ordinary skilled person that many modifications and changes can be made after reading and understanding the disclosure provided in this article. According to the foregoing description, in addition to the functions and methods enumerated herein, the functionally equivalent methods and devices within the scope of the present invention will also be obvious to those familiar with the art. Parts and features of some embodiments may be included in or replaced by parts and features of other embodiments. These amendments and changes are intended to fall within the scope of the attached invention application patent. Therefore, the present invention is only limited by the terms of the scope of the appended invention application together with the full scope of equivalents conferred by the scope of the invention application. It should also be understood that the terms used herein are only for the purpose of describing particular embodiments and are not intended to be limiting.

[Chinese] of the present invention is provided to allow readers to quickly determine the nature of the technical invention. When submitting an abstract, it should be understood that it will not be used to interpret or limit the scope of patent applications for inventions. In addition, in the foregoing [Embodiments], it can be understood that, for the purpose of simplifying the present invention, various features can be combined in a single embodiment. The method of the present invention should not be interpreted as limiting the scope of patent applications. Therefore, the scope of the following invention application patents is thus incorporated into the [Embodiment], in which each claim item is independently regarded as a separate embodiment.

100: International Commission on Illumination (CIE) Color Table 101: Black Body Line (BBL) 103: Mark Down Ellipse (MAE) 105: MAE Step 107: MAE Step 109: MAE Step 111: MAE Step 115A: Curve 115B: Curve 115C: Curve 115D: Curve 117: Isotherm 117A: First Isotherm 117B: Second Isotherm 117C: Third Isotherm 117D: Fourth Isotherm 200: Chromaticity Diagram 201: Coordinates/LED Coordinate position 203: coordinate/LED coordinate position 205: coordinate/LED coordinate position 250: chromaticity diagram 251: coordinate 253: coordinate 255: coordinate 257: triangle 270: chromaticity diagram 271: coordinate 273: coordinate 275: coordinate 277: triangle 300: Color Tuning Device 301: Flux Control Device 303: Correlated Color Temperature (CCT) Control Device 305: Single Channel Driver Circuit 310: Customer Facilities 320: Combination Light-Emitting Diode (LED) Drive Circuit/LED Array 400: Color Tuning Device 401: Control device 403: Single channel driver circuit 410: Customer installation area 420: Combined LED driver circuit/LED array 500: High-level schematic 510: Desaturated LED array 511: ``R'' LED 513: ``G'' LED 515: ``B '' LED 520: Control switch 521: Control switch 523: Control switch 525: Control switch 530: Controller box 531: Analog to digital converter (ADC) 550: Color tuning and luminous flux control device 551: CCT control device 553: D _uv Control device 555: flux control device 600: display screen 610: first channel 611: first button 613: second button 615: D _uv display part 620: second channel 621: first button 623: second button 625: CCT display part 630: third channel 631: first button 633: second button 635: luminous flux display part 700: method 701: operation 703: operation 705: operation 707: operation 709: operation 710: CCT branch 711: operation 713: Operation 715: Operation 717: Operation 719: Operation 720: D _uv branch 721: Operation 723: Operation 725: Operation 730: Flux branch

Figure 1 shows a part of the International Commission on Illumination (CIE) color table, including a black body line (BBL);

Figure 2A shows a chromaticity diagram with approximate chromaticity coordinates for the colors of typical red (R), green (G) and blue (B) LEDs;

Figure 2B shows a modified version of the chromaticity diagram of Figure 2A with the approximate chromaticity coordinates of the desaturated R, G, and B LEDs close to BBL according to various embodiments of the disclosed subject matter, desaturated R, G, and B LED has a color rendering index (CRI) of approximately 90+ and within a defined color temperature range;

Figure 2C shows a modified version of the chromaticity diagram of Figure 2A with the approximate chromaticity coordinates of the desaturated R, G, and B LEDs close to BBL according to various embodiments of the disclosed subject matter, desaturated R, G, and B The LED has a color rendering index (CRI) that is approximately 80+ and is wider than the defined color temperature range of one of the desaturated R, G, and B LEDs in FIG. 2B;

Figure 3 shows a color tuning device of the prior art that requires a separate flux control device and a separate CCT control device;

Figure 4 shows another prior art color tuning device using a single control device that controls both the color temperature and intensity of the LED;

FIG. 5 shows an example of a high-level schematic diagram of a color tuning and luminous flux control device, a controller box, and a desaturated LED array including, for example, the desaturated LEDs of FIGS. 2B and 2C according to various embodiments of the disclosed subject matter ；

FIG. 6 shows an exemplary embodiment of the color tuning and luminous flux control device of FIG. 5 implemented on a display screen according to various exemplary embodiments of the disclosed subject matter; and

Fig. 7 shows an exemplary method for setting the parameters of CCT, D _uv and luminous flux of the LED array.

500: High-level schematic

510: Desaturated LED array

511: "R" LED

513: "G" LED

515: "B" LED

520: Control switch

530: Controller box

531: Analog to Digital Converter (ADC)

550: Color tuning and luminous flux control device

551: CCT control device

553: D _uv control device

555: flux control device

Claims (20)

A control device for color tuning a light emitting diode (LED) array, the device includes: A correlated color temperature (CCT) control device configured to be adjusted by an end user to a desired color temperature of an LED array, and the CCT control device is further configured to generate an output signal corresponding to the desired color temperature; A Duv control device configured to be adjusted by an end user to a required Duv distance from a black body line (BBL) of the LED array. The Duv control device is further configured to generate a distance corresponding to the distance from the BBL. Output signal for one of the required Duv distances; A flux control device configured to be adjusted by an end user to a desired luminous flux value of the LED array, and the flux control device is further configured to generate an output signal corresponding to the desired luminous flux value; and A controller box comprising an LED driving circuit for supplying current to the LEDs of at least two colors in the LED array, the controller box being configured to receive the desired color temperature corresponding to the desired color temperature and the distance from the BBL The output signals of the Duv distance and the desired luminous flux value and make a determination as to which of the at least two color LEDs receives the current. The control device of claim 1, wherein the LED array includes at least one LED for each of three selected colors of light in the visible portion of the spectrum. Such as the control device of claim 1 or 2, wherein the controller box contains an algorithm configured to receive the CCT control device, the Duv control device, and the flux control device. A value of the output signal is respectively related to a corresponding color temperature value, an adjustment value of the Duv from the BBL, and a luminous flux value. For example, the control device of claim 1 or 2, wherein the controller box includes a look-up table (LUT) for receiving data from each of the CCT control device, the Duv control device, and the flux control device A value of the output signal is respectively related to a corresponding color temperature value, an adjustment value of the Duv from the BBL, and a luminous flux value. For example, the control device of claim 1 or 2, which further includes a plurality of control switches for supplying the current to a selected one of the LEDs in the LED array, the selection of the LEDs is based on at least one of the CCT output signals received CCT value. Such as the control device of claim 5, wherein the plurality of control switches are configured to periodically provide current to the LEDs of at least two colors of the LED array within a predetermined amount of time. Such as the control device of claim 1 or 2, wherein the LED array is a multi-color array including a plurality of LEDs of different colors. The control device of claim 7, wherein the LEDs of the plurality of colors in the LED multi-color array include at least one red LED, at least one green LED, and at least one blue LED. The control device of claim 7, wherein the LED multicolor array includes at least one desaturated red LED, at least one desaturated green LED, and at least one desaturated blue LED. The control device of claim 1 or 2, wherein the LED drive circuit further includes a voltage-controlled current source configured to substantially simultaneously supply current to at least two LEDs in the LED array. Such as the control device of claim 1 or 2, wherein the LED drive circuit is configured to supply a pulse width modulation (PWM) time-sliced signal to a hybrid drive circuit of selected LEDs in the LED array, the Waiting for the selected LED is based at least in part on the desired color temperature. Such as the control device of claim 1 or 2, wherein each of the CCT control device, the Duv control device and the flux control device includes a 0V to 10V dimmer device. Such as the control device of claim 1 or 2, wherein each of the CCT control device, the Duv control device, and the flux control device includes a voltage divider. Such as the control device of claim 1 or 2, wherein each of the CCT control device, the Duv control device and the flux control device includes one channel in a touch screen display. A controllable lighting device, which includes: An LED array having at least one desaturated red LED, at least one desaturated green LED, and at least one desaturated blue LED; and Color adjustment and luminous flux control devices, which include: A correlated color temperature (CCT) control device configured to be adjusted by an end user to a desired color temperature of the LED array, and the CCT control device is further configured to generate an output signal corresponding to the desired color temperature; A Duv control device configured to be adjusted by an end user to a required Duv distance from a black body line (BBL) of the LED array. The Duv control device is further configured to generate a distance corresponding to the distance from the BBL. Output signal for one of the required Duv distances; and A flux control device configured to be adjusted by an end user to a desired luminous flux value of the LED array, and the flux control device is further configured to generate an output signal corresponding to the desired luminous flux value. Such as the controllable lighting device of claim 15, wherein the desired Duv distance from the BBL is configured to adjust an overall color shift of the LED array along an isothermal CCT line corresponding to the desired color temperature. For example, the controllable lighting device of claim 15 or 16, further comprising a controller box including the desaturated red LED, the desaturated green LED and the desaturated green LED for supplying current to the LED array At least one of the LED drive circuits for saturated blue LEDs, the controller box is configured to receive the output signals corresponding to the desired color temperature, the desired Duv distance from the BBL, and the desired luminous flux value, and make the relevant It is determined which of the LEDs of at least two colors receives the current. The controllable lighting device of claim 15 or 16, wherein the LED array has a color rendering index (CRI) value greater than about 90. For example, the controllable lighting device of claim 15 or 16, wherein the LED array having the at least one desaturated red LED, the at least one desaturated green LED, and the at least one desaturated blue LED is configured to have from about 2700 A color temperature range from K to about 6500 K. A method for setting parameters of a multi-color LED array, the method includes: For each of a correlated color temperature (CCT) output signal, a Duv output signal and a flux output signal: Make the CCT output signal, the Duv output signal and the flux output signal be respectively related to a color temperature value, a Duv distance from a black body line (BBL) value, and a luminous flux value; Sending each of the related values to a controller for controlling a color temperature and intensity level of the multicolor LED array; and Control the amount of current delivered to one of the LEDs of at least two colors in the multi-color LED array.

Images