COLOR COMPENSATION FOR OPTICAL MODIFICATION

Abstract

Lighting fixtures, including: an array of light-emitting diodes (“LED”) light sources, wherein each LED light source defines a color channel of the illuminator, a driver circuit that drives the array of LED light sources; a lens; a motor with a motor shaft the motor shaft is connected to the motor and the lens, and wherein the motor shaft rotates to reposition the lens arrangement such that one rotational position of the motor shaft corresponds to one position of the lens relative to the light sources, and a controller comprising a non-volatile, computer-readable medium and a processing unit, wherein the controller has computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the lighting device in order to: to receive an initial output color spectrum for the array of LED light sources that corresponds to a color output spectrum of the illuminator, to perform an optical modification of the output color spectrum of the lighting device, to determine a compensation value based on the optical modification in order to modify the first output color spectrum into a second output color spectrum that compensates for the changes to the output color spectrum of the illuminator resulting from the optical modification, based on the compensation value, to generate a first control signal to drive the array of LED light sources with the second output color spectrum, and to control the driver circuit using the first control signal.

Description

AREA

[0001] The embodiments described herein relate to controlling the output of a lighting device. BACKGROUND

[0002] The lens arrangement (e.g., lenses, diffusers, filters, or other optical components) of a lighting fixture allows the fixture to manipulate light emitted by light sources (e.g., light-emitting diodes or LEDs). Advanced lighting systems feature fixtures capable of performing optical modifications to the light emitted by LEDs via the lens arrangement. LEDs can emit white light or colored light, commonly referred to as the visible light spectrum. The visible light spectrum typically has wavelengths between 380 and 700 nanometers. Optical modification of the visible light spectrum is typically achieved by bending and changing the direction of the light emitted by light sources using a lens arrangement.

[0003] EP 4 180 711 A1 describes a luminaire and an LED light source, wherein the luminaire comprises the LED light source and an optical device. The LED light source comprises an LED array and a partial diffuser. The partial diffuser scatters the light emitted by a selected first subset of LEDs in the LED array and allows the undefined light emitted by a second subset of LEDs in the LED array to pass through. The optical device is configured to receive a light beam emitted by the LED light source and to emit a modified light beam.

[0004] US 2020 / 0232625A1 describes a luminaire comprising a controller and an optical system with an LED module. The LED module has an LED circuit board that is electrically connected to the controller. The LED module can be removed from the luminaire without removing other elements of the optical system by electrically disconnecting the LED circuit board from the controller and mechanically disconnecting the LED module from the luminaire. SUMMARY

[0005] Optical modifications are useful for manipulating emitted light, but they can also shift the spectrum of the emitted light. Different wavelengths of light in the visible spectrum can be shifted at different rates by the optical modification. This can result from each LED having a different position relative to the lens array. Furthermore, when an optical modification is performed, the direction in which the rays of emitted light are deflected as they exit the lens can also change. This can lead to a shift in the light emitted by the lens array.

[0006] The embodiments described herein provide systems, devices, and methods for controlling the output of a lighting fixture. The lighting fixture has a plurality of light sources. The lighting fixture is designed to produce an output that achieves a desired output color spectrum using different wavelengths of light. A controller performs an optical modification according to a change in the desired output color spectrum. A ratio between the optical modification and the output color spectrum is then used to determine a color compensation value. The color compensation value is used to determine a control signal that drives the light sources. When the optical modification is performed, the controller is designed to modify the control signal that drives the light sources based on the color compensation value.

[0007] According to some embodiments, a lighting device that produces an output comprises an array of light-emitting diodes (“LEDs”) light sources, a driver circuit, and a controller. Each LED light source defines a color channel of the lighting device. The driver circuit drives the array of LED light sources. The lighting device includes a lens and a motor with a motor shaft. The motor shaft is connected to the motor and the lens. The motor shaft rotates to reposition the lens array such that one rotational position of the motor shaft corresponds to one position of the lens relative to the light sources. The controller comprises a non-volatile, computer-readable medium and a processing unit, the controller also having computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the lighting device.Controlling the operation of the luminaire involves receiving an initial output color spectrum for the array of LED light sources, corresponding to a color output spectrum of the luminaire (e.g., a CIE 1931 chromaticity diagram, a LAB color space, or any representation of a color range). Controlling the operation of the luminaire also involves performing an optical modification of the luminaire's output color spectrum. Furthermore, controlling the operation of the luminaire involves determining a compensation value based on the optical modification to modify the initial output color spectrum into a second output color spectrum that compensates for the changes to the luminaire's output color spectrum resulting from the optical modification.Controlling the operation of the lighting fixture also involves generating an initial control signal based on the compensation value to drive the array of LED light sources with the second output color spectrum. Controlling the operation of the lighting fixture also involves controlling the driver circuitry using this initial control signal.

[0008] According to some embodiments, a system controls the output of a lighting fixture. The system comprises the lighting fixture and a controller. The lighting fixture comprises an array of light-emitting diodes (“LEDs”) light sources and a driver circuit. Each LED light source emits one color channel of the lighting fixture. The driver circuit drives the array of LED light sources. The controller generates a direct drive signal for one or more arrays of LED light sources. The controller comprises a non-volatile, computer-readable medium and a processing unit, wherein the controller has computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the lighting fixture. Controlling the operation of the lighting fixture involves receiving an initial output color spectrum of the lighting fixture emitted by the array of LED light sources.Controlling the operation of the luminaire also involves performing an optical modification of the luminaire's first output color spectrum. Furthermore, controlling the operation of the luminaire involves determining a compensation value based on this optical modification to compensate for changes to the luminaire's first output color spectrum resulting from the optical modification. Finally, controlling the operation of the luminaire involves generating a first control signal based on this compensation value to drive the array of LED light sources to emit a second output color spectrum. Finally, controlling the luminaire's operation involves controlling the driver circuitry using this first control signal.

[0009] According to some embodiments, a method is used to control the lighting device. The method includes determining a first output color spectrum of the lighting device, wherein the lighting device has an array of LED light sources. The method also includes performing an optical modification of the lighting device's output color spectrum. The method further includes determining a compensation value based on the optical modification to compensate for changes in the lighting device's output color spectrum resulting from the optical modification. The method also includes generating a first control signal based on the compensation value to drive the array of LED light sources to emit a second output color spectrum of the lighting device. The method further includes controlling the driver circuitry using the first control signal.

[0010] According to some embodiments, a illuminator comprises a lens, a first LED, a second LED, a driver circuit, and a controller. The first LED has a first LED output color spectrum. The second LED has a second LED output color spectrum, wherein the first and second output color spectrums are mixed and passed through the lens to produce an output color spectrum of the illuminator. The driver circuit drives the first and second LEDs. The controller comprises a non-volatile, computer-readable medium and a processing unit, wherein the controller has computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the illuminator. Controlling the operation of the illuminator also includes receiving an output color spectrum from the illuminator.Controlling the operation of the illuminator also involves modifying the lens position relative to the first and second LEDs. Furthermore, controlling the operation of the illuminator involves determining a value based on the lens position modification that compensates for changes in the illuminator's output color spectrum resulting from this modification. Finally, controlling the operation of the illuminator involves generating a control signal based on this value to drive the first LED with a third LED output color spectrum that differs from the first LED's output color spectrum. Finally, controlling the illuminator's operation also involves controlling the driver circuitry using the first control signal.

[0011] Before a detailed description of any embodiments, it should be understood that the embodiments are not limited in their application to the details of the design and arrangement of components presented in the following description or illustrated in the accompanying drawings. The embodiments can be practiced or implemented in various ways. It should also be understood that the language and terminology used herein serve descriptive purposes and are not to be considered limiting. The use of "featuring," "comprising," or "with," and variations thereof, is intended to include the elements and equivalents listed thereafter, as well as additional elements.Unless otherwise specified or limited, the terms “mounted”, “connected”, “supported” and “coupled” and variations thereof are used generally to include both direct and indirect mountings, connections, supports and couplings.

[0012] Furthermore, it should be understood that embodiments may include hardware, software, and electronic components or modules which, for illustrative purposes, are presented and described as if the majority of the components were implemented exclusively in hardware. However, those skilled in the art would recognize, based on reading this detailed description, that in at least one embodiment, the electronic-based aspects may be implemented in software (e.g., stored on a non-volatile, computer-readable medium) that may be executable by one or more processing units such as a microprocessor and / or application-specific integrated circuits (“ASICs”). It should be noted that a variety of hardware- and software-based devices, as well as a variety of different structural components, may be used to implement the embodiments.For example, “servers” and “computing devices” described in the patent specification may include one or more processing units, one or more computer-readable media modules, one or more input / output interfaces, and various connections (e.g., a system bus) that connect the components.

[0013] Other aspects of the embodiments will become clear when considering the detailed description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a block diagram of a lighting device according to the embodiments described herein. Fig. Figure 2 is a perspective view of the lighting fixture. Fig. 1, where a section of the casing has been removed. Fig. Figure 3 shows a flowchart of a procedure for controlling an output of the lighting fixture. Fig. 1 dar. Fig. Figure 4 shows a flowchart of a procedure for controlling an output of the lighting fixture. Fig. 1 dar. Fig. Figure 5 is a diagram of the output color spectrum of the illuminator. Fig. 1 based on optical modification. Fig. 6A is a diagram of the first LED output color spectrum of the illuminator from Fig. 1 based on optical modification. Fig. Figure 6B is a diagram of the calibrated first LED output color spectrum after optical modification of Fig. 6A. Fig. 7A is a diagram of a second LED output color spectrum of the illuminator from Fig. 1 based on optical modification. Fig. 7B is a diagram of the calibrated second LED output color spectrum after the optical modification of Fig. 7A. DETAILED DESCRIPTION

[0014] In some embodiments, lighting fixtures are used, for example, in a theater, a hall, an auditorium, a hotel, a cruise ship, or the like. As in Fig. As shown in Figure 1, each lighting unit 100 comprises a controller 105, a plurality of light sources 110A-110C, a plurality of light source drivers or driver circuits 115A-115C, a power control circuit 117, a user interface 120, one or more displays 125, one or more sensors 170, and a motor 175. In some embodiments, the lighting unit 100 is separate from the controller 105. In other embodiments, the controller 105 is contained within the lighting unit 100 together with the light sources 110A-110C and the driver circuits 115A-115C.

[0015] The controller 105 comprises a variety of electrical and electronic components that provide power, operational control, and protection for the components and modules in the controller 105 and / or the lighting unit 100. For example, the controller 105 includes, among other things, a processing unit 130 (e.g., a microprocessor, a microcontroller, or another suitable programmable device), a memory 135, input units 140, and output units 145. The processing unit 130 includes, among other things, a control unit 150, an arithmetic logic unit (“ALU”) 155, and a variety of directories 160 (as a group of directories in Fig. 1) and is implemented using a known computer architecture (e.g., a modified Harvard architecture, a von Neumann architecture, etc.). The processing unit 130, the memory 135, the input units 140, and the output units 145, as well as the various modules connected to the controller 105, are connected by one or more control and / or data buses (e.g., command bus 165). The use of one or more control and / or data buses for the connection between and communication among the various modules and components would be known to those skilled in the art with regard to the invention described herein. The control and / or data buses are generally in Fig. 1 shown for illustrative purposes.

[0016] Memory 135 is a non-volatile, computer-readable medium and includes, for example, a program memory area and a data memory area. The program memory area and the data memory area can comprise combinations of different types of memory, such as ROM, RAM (e.g., DRAM, SDRAM, etc.), EEPROM, flash memory, a hard disk, an SD card, or another suitable magnetic, optical, physical, or electronic storage device. The processing unit 130 is connected to memory 135 and executes software instructions that may be stored in RAM of memory 135 (e.g., during execution), in ROM of memory 135 (e.g., on a generally persistent basis), or in another non-volatile, computer-readable medium, such as another memory or disk.The software included in the implementation of the lighting unit 100 can be stored in the memory 135 of the controller 105. The software comprises, for example, firmware, one or more applications, program data, filters, rules, one or more models (e.g., an output color spectrum, a spectral model, a CIE 1931 chromaticity diagram, or the like), one or more program modules, and other executable instructions. The controller 105 is designed, among other things, to retrieve and execute instructions from the memory 135 relating to the control processes and procedures described herein. In other embodiments, the controller 105 has additional, fewer, or different components.

[0017] In some embodiments, the user interface 120 is included to receive user input from a user. The user interface 120 is functionally coupled to the controller 105 to supply an input signal indicating the user input to the controller 105. The controller 105 receives the input signal from the user interface 120 to, for example, control the output of the light sources 110A-110C and to generate and provide control signals for the driver circuits 115A-115C based on the input signal. The user interface 120 can include any combination of digital and analog input devices required to receive user input for the lighting fixture 100. For example, the user interface 120 can include a computer with a display and input devices, a touchscreen display, a variety of knobs, selectors, switches, buttons, controls, or the like.In some embodiments, the user interface 120 is separate from the lighting fixture 100. In some embodiments, the controller 105 controls the lighting fixture 100 independently of the user interface 120.

[0018] The driver circuits 115A-115C each comprise a first driver circuit 115A, a second driver circuit 115B, and a third driver circuit 115C, all of which are operable to drive (e.g., control) the light sources 110A-110C. The first driver circuit 115A is connected to a first array of light sources 110A and provides one or more driver signals for the first array of light sources 110A. The second driver circuit 115B is connected to a second array of light sources 110B and provides one or more driver signals for the second array of light sources 110B. The third driver circuit 115C is connected to a third array of light sources 110C and provides one or more driver signals for the third array of light sources 110C.

[0019] The power control circuit 117 supplies a nominal AC or DC voltage to the lighting fixture 100 or a system of lighting fixtures. In some embodiments, the power control circuit 117 is powered by one or more batteries or battery packs. In other embodiments, the power control circuit 117 is powered by a mains supply with nominal mains voltages between, for example, 100 V and 240 V AC and frequencies of approximately 50–60 Hz. The power control circuit 117 is also designed to supply lower voltages to operate circuits and components within the lighting fixture 100.

[0020] As in Fig. As shown in Figure 1, the controller 105 is connected to the light sources 110A-110C. In some embodiments, each light source 110A-110C is a chip-on-board (“COB”) light source. An embodiment with three light sources is shown only as an example. In other embodiments, four or more light sources are used to further increase the illuminator's ability to produce visible light. In contrast, other implementations use fewer than three light sources (i.e., one or two light sources). The light sources 110A-110C are light-emitting diode (“LED”) arrays, although in additional embodiments the light source may vary. For example, the first array of light sources 110A defines a first color channel of the illuminator 100. The second array of light sources 110B defines, for example, a second color channel of the illuminator 100.The third array of light sources 110C, for example, defines a third color channel of the illuminator 100. In some embodiments, each array of light sources corresponds to multiple color channels of the illuminator (e.g., both a first and a second color channel of the illuminator 100). Each color channel of the illuminator 100 (e.g., the first color channel defined by the first array of light sources 110A, the second color channel defined by the second array of light sources 110B, the third color channel defined by the third array of light sources 110C, etc.) has at least one first output color. In some embodiments, the first color channel of the first light source 110A has the first output color, a second output color, and any greater number of output colors.For example, the first array of light sources 110A can include a first LED light source emitting the first output color and a second LED light source emitting the second output color. The first output color has a first LED output color spectrum, and the second output color has a second LED output color spectrum. In some embodiments, the second LED output color spectrum differs from the first LED output color spectrum. In other embodiments, the second LED output color spectrum is identical to the first LED output color spectrum. Each light source of the plurality of light sources 110A-110C is designed to operate similarly to the first array of light sources 110A, as described above. In some embodiments, a light source of the plurality of light sources 110A-110C can operate differently than described above.In combination, the first LED output color spectrum of the first array of light sources 110A, the second LED output color spectrum of the second array of light sources 110B, and further LED output color spectra of the multitude of light sources 110A-110C produce a color output spectrum of the luminaire 100. In other words, each individual LED output color spectrum is used in combination with other LED output color spectra to produce the output color spectrum of the luminaire that is emitted by the luminaire 100.

[0021] As in Fig. As shown in Figure 1, the controller 105 is also connected to one or more sensors 170 and the motor 175. In some embodiments, each sensor 170 is a position sensor that detects the position of the motor 175 and provides the controller 105 with one or more signals indicating the position of the motor 175. For example, the sensors 170 can be linear position sensors, rotary position sensors, or angular position sensors. The motor 175 drives the movement of various components of the lighting fixture 100 to perform any number of lighting operations. For example, based on the signals received from the one or more sensors 170, the controller 105 can provide one or more control signals to the motor 175. Based on one or more control signals from the controller 105, the motor 175 drives the movement of various components of the lighting fixture 100 (e.g.,a lens arrangement, a belt drive arrangement or the like, hereinafter referred to as . Fig. (2 further described). In some embodiments, the motor 175 is a direct current (“DC”) motor that receives power from the power control circuit 117. For example, the motor 175 can be a brushed DC motor, a brushless DC motor, a stepper motor, or the like. In some embodiments, it is not necessary to detect the position of the motor 175 using the one or more sensors 170. Instead, the controller 105 can receive one or more output signals from the motor 175 indicating its position. Based on the one or more output signals from the motor 175, the controller 105 determines the position of the motor 175. For example, the motor 175 can drive the lens assembly into a final position of the belt drive assembly.In the final position of the belt drive arrangement, the lens arrangement can no longer be driven, and the controller 105 determines the position of the motor 175 based on the fact that the lens arrangement stops in the final position of the belt drive arrangement.

[0022] Fig. Figure 2 shows an exemplary embodiment of the lighting body 100 in an assembly view. As in Fig. As shown in Figure 2, the lighting unit 100 comprises the control unit 105, the light sources 110A-110C, the motor 175, a housing 205, a belt drive assembly 210, and a lens assembly 215. For illustrative purposes, a section of the housing 205 has been removed. In the illustrated embodiment, the components of the lighting unit 100 are at least partially located within the housing 205. In some embodiments, some of the components of the lighting unit 100 may be located outside the housing 205. The motor 175 has a motor shaft. The belt drive assembly 210 is connected to the motor shaft, and the lens assembly 215 is connected to the motor shaft via the belt drive assembly 210. In response to a control signal from the controller 105, the motor 175 drives the belt drive assembly 210 to move the lens assembly 215 relative to the light sources 110A-110C.In some cases, the lens assembly 215 is driven away from the light sources 110A-110C. In other cases, the lens assembly 215 is driven in the direction of the light sources 110A-110C. The lens can be driven linearly toward and away from the light sources 110A-110C. Since the motor shaft rotates to reposition the lens assembly 215, one rotational position of the motor shaft corresponds to one position of the lens assembly 215 relative to the light sources 110A-110C. The lens assembly 215 can perform an optical modification to change the light emitted by the light sources 110A-110C as the emitted light passes through the lens assembly 215. In some embodiments, the lens assembly 215 may include one or more lenses, diffusers, filters, apertures, or other optical components to perform the optical modification.For example, the optical modification can be one or more of a zoom, a focus, a prismatic shift, a glare, or the like. In some cases, numerous optical modifications can occur simultaneously. In some embodiments, the lens arrangement comprises two or more lenses that are movable relative to each other.

[0023] Fig. Figure 3 presents a flowchart of a procedure 300 for controlling the output of the illuminator 100 in order to control the color compensation of the illuminator's output color spectrum based on the optical modification. Various steps described herein with respect to the procedure 300 can be performed simultaneously, in parallel, or in a sequence that differs from the serial execution shown. Although the procedure 300 is described below with respect to a single array of light sources (e.g., the first array of light sources 110A), the procedure 300 can be performed simultaneously for the plurality of light sources 110A-110C to achieve the output color spectrum of the illuminator.

[0024] In step 305, the controller 105 determines a first LED output color spectrum of the first array of light sources 110A, which corresponds to the output color spectrum of the illuminator. In some embodiments, step 305 is performed before the illuminator 100 has run (e.g., before performing an operation). In other embodiments, step 305 is performed during the illuminator 100's run (e.g., while performing an operation). The first LED output color spectrum is a combination of color outputs from the LED light sources of the first array of light sources 110A that generate the illuminator's output color spectrum. Each color output can have a known value based on a voltage value, a current value, a duty cycle, or the like.The known value is obtained by the controller 105 to determine the color output in a section of the first LED output color spectrum, which results from how each LED light source is driven. In some embodiments, the known value is stored in the memory 135 (e.g., a lookup table of known values). The controller 105 compares the first LED output color spectrum with the lookup table to determine the color output. Each LED light source is driven by a pulse-width modulated (“PWM”) signal that has a duty cycle corresponding to the color output of each LED light source. For example, the controller 105 receives a position signal from the one or more sensors 170 indicating the rotational position of the motor shaft.Based on the rotational position of the motor shaft, the controller 105 determines a first position of the lens assembly 215. The first position of the lens assembly 215 corresponds to the combination of color outputs that represent the output color spectrum of the illuminator. The controller 205 determines the first output color spectrum based on the first position of the lens assembly 215.

[0025] In step 310, the controller 105 reads a stored LED output color spectrum from memory 135. For example, the controller 105 compares the first LED output color spectrum with the LED output color spectrum stored in memory 135 to determine whether the stored LED output color spectrum matches the first LED output color spectrum. Although step 315 is shown as a separate step from steps 305 and 310, in some embodiments, step 315 is performed simultaneously with steps 305 and 310. In other embodiments, step 315 is performed after step 310 has been completed. In step 315, the controller 105 performs an optical modification of the output color spectrum of the illuminator. For example, the controller 105 generates a motor command and sends it to motor 175 to drive lens array 215 into a second position relative to the first array of light sources.The second position differs from the first. In some embodiments, the optical modification corresponds to one or more of a zoom, focus, prismatic shift, glare, or the like of the illuminator 100. The output color spectrum of the illuminator can change based on the optical modification. For example, a shift in the output color spectrum of the illuminator can occur as a result of the optical modification. This shift can be caused by a change in the relative proportion of the visible light emitters as a result of the optical modification, or by a visible shift in the output color of a single LED light source as a result of the optical modification.

[0026] In step 320, the controller 105 determines the shift in the output color spectrum of the illuminator (e.g., a change in the output color spectrum of the illuminator from the initial color output spectrum) based on the optical modification. In some embodiments, step 320 is performed before a runtime (e.g., before performing an operation) of the illuminator 100 and is listed after step 315. In other embodiments, step 320 is performed during the runtime (e.g., while performing an operation) of the illuminator 100. For example, the controller 105 determines a change in one or more wavelengths of the color outputs of the output color spectrum of the illuminator. In step 325, the controller 105 generates a model of the change in the output color spectrum of the illuminator based on the optical modification. In some embodiments, step 325 is performed before a runtime (e.g.,Step 305 is performed before the illuminator 100 performs an operation and is listed after step 320. In other embodiments, step 305 is performed during the operation (e.g., while the illuminator 100 is performing an operation). In step 330, the controller 105 reads a stored spectral model (e.g., the CIE 1931 chromaticity diagram or the like) from memory 135. For example, the controller 105 determines the change in the illuminator's output color spectrum caused by the optical modification based on the motor 175 driving the lens assembly 215 to its second position. The controller 105 generates the model (e.g., a spectral model) of the illuminator's output color spectrum after the optical modification and compares the model with the stored spectral model to determine the change in the illuminator's output color spectrum from the first color output spectrum.

[0027] In step 335, the controller 105 modifies the output color spectrum of the illuminator by determining a compensation value to achieve a second output color spectrum that compensates for the change in the illuminator's output color spectrum resulting from the optical modification. For example, after the optical modification, the controller 105 determines the rotational position of the motor shaft that drives the lens assembly 215. Based on the rotational position after the optical modification, the controller 105 determines the position of the lens assembly 215. The controller 105 determines the compensation value to maintain the illuminator's output spectrum at or near the output before the optical modification, which occurs based on the position of the lens assembly 215 after the optical modification.

[0028] In step 340, the controller 105, based on the compensation value, generates a first control signal to drive the first array of light sources 110A with the second output color spectrum, resulting in the maintenance of the illuminator's output color spectrum. In some embodiments, the first control signal corresponds to the second position of the lens arrangement 215. For example, the controller 105 determines a value for a PWM signal (e.g., a duty cycle that will be used to drive the first array of light sources 110A) to achieve the second output color spectrum. The first control signal can include a first command (e.g., a first PWM value) to drive the first LED light source of the first array of light sources 110A with the first output color. The first control signal can also include a second command (e.g.,(a second PWM value) to operate the second LED light source of the first array of light sources 110A with a third output color in order to achieve (combined with the first LED light source) the second output color spectrum. The third output color has a third LED output color spectrum and the third output color differs from the second output color.

[0029] In step 345, the controller 105 drives (e.g., controls) the first driver circuit 115A using the first control signal. For example, the controller 105 controls the first driver circuit 115A to (i) drive the first LED light source of the first array of light sources 110A using the first command, and (ii) drive the second light source of the first array of light sources 110A using the second command, with (i) and (ii) combining to achieve the second color output spectrum. In some embodiments, in response to the first control signal, the output color spectrum of the illuminator is essentially the same before and after the optical modification.

[0030] Fig. Figure 4 presents a flowchart of a procedure 400 for controlling an output of the lighting fixture 100 in order to control the color compensation of the output color spectrum of the lighting fixture based on the optical modification. The procedure of Fig. Method 5 can be combined with the methods disclosed in the other figures. Various steps described herein with reference to Method 400 can be performed simultaneously, in parallel, or in a sequence that differs from the serial execution shown. Although Method 400 is described below with reference to a single array of light sources (e.g., the first array of light sources 110A), Method 400 can be performed simultaneously for the plurality of light sources 110A-110C to achieve the output color spectrum of the illuminator.

[0031] In step 405, the controller 105 determines a first LED output color spectrum of the first array of light sources 110A, which corresponds to the output color spectrum of the illuminator. For example, the controller 105 receives a position signal from the one or more sensors 170 indicating the rotational position of the motor shaft. Based on the rotational position of the motor shaft, the controller 105 determines a first position of the lens assembly 215. The first position of the lens assembly 215 corresponds to the combination of color outputs that represent the output color spectrum of the illuminator. The controller 105 determines the output color spectrum based on the first position of the lens assembly 215.

[0032] In step 410, the controller 105 determines whether a color compensation operation is to be performed. For example, the controller 105 determines whether an optical modification has taken place. If the controller determines that no optical modification has taken place, the procedure 400 proceeds to step 430. In step 430, the controller 105 determines an initial control signal (e.g., an output signal) to drive the first array of light sources 110A in the first output color spectrum via the first driver circuit 115A. For example, the controller 105 determines the initial output signal to maintain or substantially maintain the output color spectrum of the illuminator and drives (e.g., controls) the first driver circuit 115A using the initial control signal. In step 435, the controller 105 determines whether an optical modification has taken place.If the controller 105 determines that no optical modification has occurred, procedure 400 returns to step 430, and the first driver circuit 115A continues to drive the first array of light sources 110A with the first control signal. If the controller 105 determines that an optical modification has occurred, procedure 400 returns to step 410 to determine whether the color compensation operation should be performed based on the optical modification. If the controller 105 determines that the color compensation operation should be performed based on the optical modification, procedure 400 proceeds to step 415.

[0033] In step 415, the controller 105 determines the shift in the output color spectrum of the illuminator (e.g., the change in the output color spectrum of the illuminator from the first color output spectrum) based on the optical modification. For example, the controller 105 determines a change in one or more wavelengths of the color outputs of the illuminator's output color spectrum. The controller 105 generates a model of the change in the output color spectrum of the illuminator based on the optical modification and reads a stored spectral model (e.g., the CIE 1931 chromaticity diagram or the like) from memory 135. For example, the controller 105 determines the change in the output color spectrum of the illuminator caused by the optical modification based on the motor 175 driving the lens assembly 215 to the second position. The controller 105 generates the model (e.g.,a spectral model) of the output color spectrum of the illuminator after the occurrence of the optical modification and compares the model with the stored spectral model to determine the change in the output color spectrum of the illuminator.

[0034] In step 420, the controller 105 modifies the output color spectrum of the illuminator with a compensation value to achieve a second output color spectrum that compensates for the change in the illuminator's output color spectrum resulting from the optical modification. The compensation value can be the specific change in one or more wavelengths of the illuminator's output color spectrum after the optical modification. For example, the controller 105 determines the rotational position of the motor shaft after the optical modification. Based on this rotational position, the controller 105 determines the position of the lens assembly 215. The controller 105 then determines the compensation value to maintain, or substantially maintain, the illuminator's output spectrum based on the position of the lens assembly 215 after the optical modification.

[0035] In step 425, the controller 105 stores the modified output color spectrum of the illuminator (e.g., the second output color spectrum) in memory 135. In step 430, based on the compensation value, the controller 105 determines a first control signal to drive the array of light sources 110A with the second output color spectrum. In some embodiments, the first control signal corresponds to the second position of the lens arrangement 215. For example, the controller 105 generates a value for a PWM signal (e.g., a duty cycle that will be used to drive the first array of light sources 110A) to achieve the second output color spectrum. The first control signal can include a first command (e.g., a first PWM value) to drive the first LED light source of the first array of light sources 110A with the first output color. The first control signal can also include a second command (e.g.,(a second PWM value) to drive the second LED light source of the first array of light sources 110A with a third output color, in order to achieve (combined with the first color output of the LED light source) the second output color spectrum. The third output color has a third LED output color spectrum and the third output color differs from the second output color.

[0036] The controller 105 drives (e.g., controls) the first driver circuit 115A using the first control signal. For example, to achieve the second color output spectrum, the controller 105 drives the first driver circuit 115A to drive the first LED light source of the first array of light sources 110A using the first command, and drives the second light source of the first array of light sources 110A using the second command. In some embodiments, in response to the first control signal, the output color spectrum of the illuminator (e.g., the second output color spectrum) is essentially the same before and after the optical modification.

[0037] In step 435, the controller 105 determines whether an optical modification has occurred. If the controller 105 determines that no optical modification has occurred, procedure 400 returns to step 430, and the first driver circuit 115A continues to drive the first array of light sources 110A with the first control signal. If the controller 105 determines that an optical modification has occurred, procedure 400 returns to step 410 to determine whether the color compensation operation should be performed based on the optical modification. If the controller 105 determines that the color compensation operation should be performed based on the optical modification, procedure 400 returns to step 415.

[0038] While the embodiments described herein relate to controlling the color compensation of a single LED light source of the first array of LED light sources 110A based on the optical modification, additional LED light sources can be color-compensated in response to the optical modification. For example, the illuminator 100 can include the lens arrangement 215 (further comprising a lens), the first LED light source (e.g., a first LED) with the first output color spectrum, the second LED light source (e.g., a second LED) with a second output color spectrum, the first driver circuit 115, and the controller 105. In some embodiments, the first and second output color spectra are mixed and passed through the lens to produce the output color spectrum of the illuminator.

[0039] The controller 105 receives a position signal from one or more sensors 170 indicating the rotational position of the motor shaft. Based on the rotational position of the motor shaft, the controller 105 determines an initial lens position. The controller 205 determines the output color spectrum of the light source based on this initial lens position. The controller 105 can modify the initial lens position relative to the first and second LEDs to achieve a second lens position (e.g., an optical modification). The controller 105 determines a value (e.g., a compensation value) that compensates for the changes in the output color spectrum of the light source resulting from the lens position modification to the second position.Based on the determined compensation value, the controller 105 generates a control signal to drive the first LED with a third LED output color spectrum that differs from the first LED output color spectrum. The controller 105 drives (e.g., controls) the first driver circuit 115A using the first control signal.

[0040] In some embodiments, the controller 105 determines the compensation value such that the output color spectrum of the illuminator remains essentially unchanged before and after the modification of the lens position relative to the first and second LEDs. In some embodiments, based on the compensation value, the controller 105 generates a second control signal to drive the second LED with a fourth LED output color spectrum that differs from the second LED output color spectrum. The controller 105 drives the first driver circuit 115A using the second control signal.

[0041] In some embodiments, the controller 105 includes a third LED light source (e.g., a third LED) with a fifth output color spectrum. In some embodiments, the first, second, and fifth output color spectrums are mixed and passed through the lens to generate the output color spectrum of the illuminator. Based on the compensation value, the controller 105 generates a third control signal to drive the third LED with a sixth LED output color spectrum that differs from the fifth LED output color spectrum. The controller 105 drives the first driver circuit 115A using the third control signal. In some embodiments, the first, second, and fifth output color spectrums differ.

[0042] Fig. Figure 5 shows a diagram 500 of the output color spectrum of the illuminator 100 based on an optical modification. In the illustrated embodiment, the output color spectrum of the illuminator has a plurality of LED output color spectra. Each LED output color spectrum of the plurality of LED output color spectra corresponds to a respective wavelength (e.g., wavelengths in the visible light spectrum) and has a relative intensity of the respective LED output color spectrum. The wavelength of each LED output color spectrum corresponds to a color output for each respective LED output color spectrum. The relative intensity is normalized to a peak that occurs at exactly "1" (e.g., 100% intensity). The relative intensity of each wavelength is shown as its ratio to the peak.For example, if a wavelength is half as bright as the brightest wavelength, then the relative intensity of that wavelength would be displayed as "0.5" (e.g., a 50% intensity). Line 505 represents the output color spectrum of the illuminator before the optical modification. For example, line 505 represents illuminator 100 with lens arrangement 215 in the first position. Line 510 represents the output color spectrum of the illuminator after the optical modification. For example, line 510 represents illuminator 100 with lens arrangement 215 in the second position. As in... Fig. As shown in Figure 5, the output color spectrum of the illuminator undergoes a change in relative intensity after the optical modification, particularly in the wavelength range between 430 nm and 480 nm. Fig. 6A-7B, which are explained in more detail below, illustrate how the outputs of each LED light source are driven to produce the light in Fig. 5. To compensate for the change in the output color of the lighting fixture shown.

[0043] Fig. Figure 6A represents a diagram 600A of the first LED output color spectrum of the first LED light source based on an optical modification. The first LED output color spectrum of the first LED light source corresponds to a first wavelength and has a relative intensity of the first LED output color spectrum. The first wavelength of the first LED output color spectrum corresponds to the first color output. Line 605 represents the first LED output color spectrum before the optical modification. For example, line 605 represents the output of the first LED of the illuminator 100 with the lens arrangement 215 in the first position. Line 610 represents the first LED output color spectrum after the optical modification. For example, line 610 represents the output of the first LED of the illuminator 100 with the lens arrangement 215 in the second position. As in Fig. As shown in Figure 6A, the first LED output color spectrum undergoes a change in relative intensity after the optical modification. In the illustrated embodiment, the relative intensity of the first LED output color spectrum decreases from line 605 to line 610.

[0044] Fig. Figure 6B represents a diagram 600B of a calibrated first LED output color spectrum of the first LED light source after controlling an output of the illuminator 100 to control the color compensation. Line 615 represents the first LED output color spectrum. Line 615 is a set of measurements of relative intensities at a known point (e.g., relative intensities based on the first wavelength) that the controller 105 uses to determine a difference from the modeled first LED color spectrum. In fact, this is the target value for line 610 (i.e., the target for the LED output after the optical modification). In the illustrated embodiment, the relative intensity of line 615 is essentially the same as the relative intensity of line 605. Fig. 6A. Thus, the first output color spectrum must be compensated to account for the change in the first color output resulting from the optical modification (i.e., the difference between lines 610 and 615).

[0045] Fig. Figure 7A presents a diagram 700A of the second LED output color spectrum of the second LED light source based on an optical modification. The second LED output color spectrum of the second LED light source corresponds to a second wavelength and has a relative intensity of the second LED output color spectrum. The second wavelength of the second LED output color spectrum corresponds to the second color output. In the illustrated embodiment, the second wavelength differs from the first wavelength of Fig. 6A. Line 705 represents the second LED output color spectrum before the optical modification. For example, line 705 represents the output of the second LED of illuminator 100 with lens arrangement 215 in the first position. Line 710 represents the second LED output color spectrum after the optical modification. For example, line 710 represents the output of the second LED of illuminator 100 with lens arrangement 215 in the second position. As shown in Fig. As shown in Figure 7A, the second LED output color spectrum undergoes a change in relative intensity after the optical modification. In the illustrated embodiment, the relative intensity of the second LED output color spectrum decreases from line 705 to line 710.

[0046] Fig. Figure 7B represents a diagram 700B of a calibrated second LED output color spectrum of the second LED light source after controlling an output of the illuminator 100 to control the color compensation. Line 715 represents the second LED output color spectrum. Line 715 is a set of measurements of relative intensities at a known point (e.g., relative intensities based on the second wavelength) that the controller 105 uses to determine a difference from the modeled second LED color spectrum. Similar to line 615 above, this is the target value for line 710 (i.e., the target for the LED output after the optical modification). In the illustrated embodiment, the relative intensity of line 715 is essentially the same as the relative intensity of line 705. Fig. 7A. Due to the differences between line 710 and line 715, the output of the second LED must be compensated such that the second LED color spectrum, after the modification (represented by line 710), must be modified to match the second LED target output color spectrum (represented by line 715). If the compensated outputs, which are in the Fig. The LEDs shown in 6A-7B are combined to result in the compensated output color of the illuminator; the individual LED light sources are thus driven to produce the color shown in Fig. 5. To compensate for the change in the output color of the lighting fixture shown.

[0047] Thus, the embodiments described herein provide, among other things, systems, devices and methods for controlling an output of a lighting device in order to control the color compensation of a multitude of light sources based on an optical modification.

[0048] When used in this patent specification and the claims, the terms "includes" and "comprehensive" and variations thereof mean that the specified features, steps, or integers are included. These terms are not to be interpreted as excluding the presence of other features, steps, or components.

[0049] The invention may also consist largely of parts, elements, steps, examples, and / or features that have been individually or collectively mentioned or indicated in the patent specification, in any or all combinations of two or more of these parts, elements, steps, examples, and / or features. In particular, one or more features in one of the embodiments described herein may be combined with one or more features from all other embodiments described herein.

[0050] Protection may also be sought for all features disclosed in one or more published documents that are mentioned in combination with the present disclosure. Although certain exemplary embodiments of the invention have been described, the scope of protection of the attached claims is not intended to be limited solely to these embodiments. The claims are to be interpreted literally, purposefully, and / or to encompass equivalents.

Claims

[1] Lighting fixtures, including: an array of light-emitting diodes (“LED”) light sources, wherein each LED light source defines a color channel of the illuminator, a driver circuit that drives the array of LED light sources; a lens; a motor with a motor shaft the motor shaft is connected to the motor and the lens, and wherein the motor shaft rotates to reposition the lens arrangement such that one rotational position of the motor shaft corresponds to one position of the lens relative to the light sources, and a controller comprising a non-volatile, computer-readable medium and a processing unit, wherein the controller has computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the lighting device in order to: to receive an initial output color spectrum for the array of LED light sources that corresponds to a color output spectrum of the illuminator, to perform an optical modification of the output color spectrum of the lighting device, to determine a compensation value based on the optical modification in order to modify the first output color spectrum into a second output color spectrum that compensates for the changes to the output color spectrum of the illuminator resulting from the optical modification, based on the compensation value, to generate a first control signal to drive the array of LED light sources with the second output color spectrum, and to control the driver circuit using the first control signal. [2] Lighting body according to claim 1, wherein the color channels of the lighting body have a first output color and a second output color and wherein the array of LED light sources comprises: a first LED light source that emits the first output color, wherein the first output color has a first LED output color spectrum, and a second LED light source that emits the second output color, wherein the second output color has a second LED output color spectrum, the second LED output color spectrum being different from the first LED output color spectrum. [3] Lighting device according to claim 2, wherein the first control signal includes a first command to drive the first LED light source with the first output color, and wherein the first control signal includes a second command to drive the second LED light source with a third output color, wherein the third output color has a third LED output color spectrum, wherein the third output color differs from the second output color. [4] Lighting device according to a preceding claim, wherein the optical modification is selected at least from the group consisting of a zoom, a focus, a prismatic shift and a glare process. [5] Lighting fixture according to a preceding claim, wherein the control further controls the operation of the lighting fixture in order to: To determine the rotational position of the motor shaft after the optical modification, to determine the position of the lens after optical modification based on the rotational position, and to determine the compensation value based on the position of the lens in order to maintain the output color spectrum of the lighting body after the optical modification has been carried out. [6] Lighting device according to claim 5, wherein the first control signal corresponds to the position of the lens. [7] Lighting device according to a preceding claim, wherein the output colour spectrum of the lighting device is substantially the same as a result of the first control signal before and after the optical modification. [8] System for controlling a lighting fixture, the system comprising: a lighting fixture that emits an output, wherein the lighting fixture has: an array of light-emitting diodes (“LED”) light sources, wherein each LED light source emits one color channel of the illuminator, and a driver circuit for driving the array of LED light sources; a lens; a motor with a motor shaft the motor shaft is connected to the motor and the lens, and wherein the motor shaft rotates to reposition the lens assembly such that one rotational position of the motor shaft corresponds to one position of the lens relative to the light sources; and a controller designed to generate a direct drive signal for one or more arrays of LED light sources, the controller comprising a non-volatile computer-readable medium and a processing unit, the controller comprising computer-executable instructions stored in the non-volatile computer-readable medium for controlling the operation of the lighting device in order to: to receive an initial output color spectrum of the illuminator emitted by the array of LED light sources, to perform an optical modification of the output color spectrum of the lighting device, to determine a compensation value based on the optical modification in order to compensate for changes to the first output color spectrum of the illuminator, wherein the changes to the first output color spectrum of the illuminator result from the optical modification, based on the compensation value, to generate a first control signal to drive the array of LED light sources to emit a second output color spectrum, and to control the driver circuit using the first control signal. [9] Lighting body according to claim 8, wherein the array comprises LED light sources: a first LED light source that emits a first output color, wherein the first output color has a first LED output color spectrum, and a second LED light source that emits a second output color, wherein the second output color has a second LED output color spectrum, the second LED output color spectrum being different from the first LED output color spectrum. [10] Lighting device according to claim 9, wherein the first control signal includes a first command to drive the first LED light source with the first output color, and wherein the first control signal includes a second command to drive the second LED light source with a third output color, wherein the third output color has a third LED output color spectrum, wherein the third output color differs from the second output color. [11] Lighting device according to any one of claims 8 to 10, wherein the optical modification is selected at least from the group consisting of a zoom, a focus, a prismatic shift and a glare process. [12] Lighting device according to any one of claims 8 to 11, wherein the control further controls the operation of the lighting device in order to: to determine the rotational position of the motor shaft during optical modification to determine the position of the lens during optical modification based on the rotational position, and to determine the compensation value based on the position of the lens. [13] Lighting device according to claim 12, wherein the first control signal corresponds to the position of the lens. [14] Lighting device according to any one of claims 8 to 13, wherein the first output color spectrum of the lighting device is the same as the second output color spectrum of the lighting device. [15] Method for controlling a lighting device, the method comprising: Determining a first output color spectrum of the illuminator for the illuminator, wherein the illuminator has an array of LED light sources that are driven to emit the first output color spectrum of the illuminator, Performing an optical modification of the output color spectrum of the illuminator, Determining a compensation value based on the optical modification to compensate for changes in the output color spectrum of the illuminator resulting from the optical modification. Generating an initial control signal based on the compensation value to drive the array of LED light sources to emit a second output color spectrum, and Controlling the driver circuit using the first control signal, the lighting fixture has a lens, the procedure further includes: Determining a rotational position of a motor shaft that corresponds to a position of the lens. [16] Method according to claim 15, wherein the first control signal comprises a first command to drive a first LED light source of the array of LED light sources with the first output color, wherein the first control signal includes a second command to drive a second LED light source of the array of LED light sources with a second output color, and where the second output color differs from the first output color. [17] Method according to claim 15 or 16, wherein the optical modification is selected at least from the group consisting of a zoom, a focus, a prismatic shift and a glare process. [18] Method according to any one of claims 15 to 17, further comprising: Determining the rotational position of the motor shaft during optical modification, Determining the position of the lens during optical modification based on the rotational position, and Determining the compensation value based on the position of the lens. [19] Method according to claim 18, wherein the first control signal corresponds to the position of the lens. [20] Method according to any one of claims 15 to 19, wherein the first output color spectrum of the illuminator is the same as the second output color spectrum of the illuminator. [21] Lighting fixtures, comprising: a lens a first LED with a first LED output color spectrum, a second LED with a second LED output color spectrum, wherein the first and second output color spectrums are mixed and passed through the lens to produce an output color spectrum of the illuminator, a driver circuit to drive the first and second LEDs, and a controller comprising a non-volatile, computer-readable medium and a processing unit, wherein the controller has computer-executable instructions stored in the non-volatile, computer-readable medium for controlling the operation of the lighting device in order to: to receive the output color spectrum of the lighting fixture, to modify the position of the lens in relation to the first and second LEDs, to determine a value based on the modification of the lens position that compensates for the changes in the output color spectrum of the illuminator resulting from the modification of the lens position, based on the value, to generate a control signal to drive the first LED with a third LED output color spectrum that differs from the first LED output color spectrum, and to control the driver circuit using the first control signal. [22] Lighting body according to claim 21, wherein the value is determined such that the output color spectrum of the lighting body remains substantially unchanged before and after the modification of the position of the lens with respect to the first and the second LED. [23] Lighting device according to claim 21 or 22, wherein the control further controls the operation of the lighting device to: generate a control signal based on the value to drive the second LED with a fourth LED output color spectrum that differs from the second LED output color spectrum. [24] Lighting device according to any one of claims 21 to 23, further comprising a third LED with a fifth output color spectrum, wherein the fifth, the first, the second output color spectrum are mixed and passed through the lens to produce the output color spectrum of the lighting device, and wherein the control further controls the operation of the lighting device in order to: based on the value, to generate a control signal to drive the third LED with a sixth LED output color spectrum that differs from the fifth LED output color spectrum. [25] Lighting body according to claim 24, wherein the first, second and fifth output color spectrums differ.

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