Patent Description:
In the motion picture and television industries, one of the most popular lighting instruments used is a focused beam light known as a "hard light. " Some lighting systems use a Fresnel glass optic combined with a tungsten bulb light source. The beam angle of "Fresnel" lights is typically user adjustable from <NUM> to <NUM> degrees. The adjustment is performed by turning a mechanical actuator that changes the focal distance between the lens and the Fresnel optic by moving either the light source or the lens. In many instances, this requires the operator to be able to physically adjust mechanical controls to change the beam angle. This can be quite problematic, as many installations are elevated in a lighting system above a stage, making access of the mechanical actuator problematic.

Another limitation of these traditional Fresnel lights is the light source. Traditional systems have included carbon arcs, tungsten light bulbs, and hydrargyrum medium-arc iodide ("HMI") light bulbs. The carbon arcs are very temperamental, require significant maintenance, consume significant power, and generate large amounts of ozone. Tungsten bulbs have a low lifespan (e.g., a <NUM>-hour life). When Fresnel lights near the end of their lifespan, the lights may exhibit a shift in color which could lead to unfavorable lighting. Further, <NUM>% of the energy is wasted on heat, and they can only emit one color-correlated temperature ("CCT") of light - <NUM>,<NUM>. HMI bulbs were developed to provide a <NUM>,<NUM> light source which is commonly needed in motion pictures to simulate outdoor light. These lights bulbs have a similar <NUM>-hour lifetime and are also not CCT adjustable. As a result, studios typically stock two completely different types of Fresnel lights, HMI and tungsten, in order to support the two commonly used color temperatures for motion picture and television. Like the original Fresnel lights, both HMI and tungsten lights utilize manual beam angle adjustment while providing increased power. For example, HMI lights come in sizes up to <NUM>,<NUM> Watts. This provides an extreme amount of light that allows film makers to simulate a hard, bright light source like the sun.

Light-emitting diode ("LED") technology has been introduced that uses similar Fresnel optics. However, the LED replacements require more conservative operating temperatures to keep from damaging the LEDs. LED light sources are also much larger than their tungsten and HMI bulb counterparts. The results are LED Fresnel lights that are high cost but very low power (<NUM>/<NUM> or less) compared to traditional tungsten and HMI Fresnel lights.

Further, color adjustable LED Fresnel lights have also been introduced. These further reduce the power, because the LED light size needed is larger when it contains a variety of different color LEDs used for color blending. These LED Fresnel lights also use manual beam control adjustment similar to traditional systems.

Another focused beam technology is a HMI parabolic reflector. This light replaces the Fresnel optic lens with a parabolic reflector. Parabolic reflectors offer higher optical efficiency and lower weight than their glass lens, Fresnel counterparts. Parabolic reflector technology is used in lights in many industries. However, such lights with parabolic reflectors face the same limitations described above of a low bulb lifetime, static CCT, and manual adjustment-based change of beam angle.

Document <CIT> describes a lighting device that comprises a first and a second light source arranged at a distance from each other, a reflector for reflecting light emitted by the first and the second light source, and switching means for switching the first and the second light source on and off independently from each other. It is desired to address at least some of the above-described limitations of the state of the art.

According to one aspect of the present invention there is provided a lighting assembly comprising: a lighting tower configured to receive an input from a user indicative of a desired beam angle and an input from a user indicative of a desired beam angle and an input from a user indicative of a desired color coordinated temperature (CCT). The lighting tower comprises: a plurality of layers of lighting elements, wherein each layer of lighting elements is configured to provide a different angle of emitted light with respect to light emitted from another layer of lighting elements when activated within a parabolic reflector, and a controller. The controller is configured to identify one or more layers of the plurality of lighting elements that generate the desired beam angle, when reflected by a parabolic reflector, provide a first activation request to the one or more layers of lighting elements in the lighting tower, wherein the first activation request causes activation of the one or more layers of lighting elements in the lighting tower, and wherein the activation of the one or more layers of lighting elements in the lighting tower generates the desired beam angle. The controller is also configured to identify one or more adjustments to lighting elements of the one or more layers of the lighting tower that would generate the desired CCT. The controller is further configured to provide a second activation request to the lighting elements of the one or more layers of the lighting tower, wherein the second activation request causes the one or more adjustments to the lighting elements of the one or more layers of the lighting tower, and wherein the one or more adjustments causes the lighting elements of the one or more layers of the lighting tower to activate, such that the desired CCT is generated.

The lighting system disclosed in an embodiment herein provides a high-power LED light with beam control capability of <NUM> to <NUM> degrees that may be controlled digitally, allowing the beam angle to be remotely adjusted without local manual adjustment of the LED light itself. In further embodiments, unique configurations of the LED light sources and color spectrums also offer higher power in a smaller space. Additionally, the lighting system provides a method of controlling CCT more efficiently and with a smaller light source than other LED light sources. one or more supplementary light sources is blended with a base light from a base light source, and performing the one or more adjustments to the one or more supplementary light sources to generate the desired CCT.

In an embodiment, a lighting assembly includes a lighting tower configured to emit light and a cooling system configured to cool the lighting tower. The cooling system includes one or more heat pipes extending into the lighting tower, a condenser configured to cool a coolant passing through the one or more heat pipes, and a pump configured to pump the coolant from the condenser, through the one or more heat pipes, and back to the condenser. The coolant is configured to absorb heat generated by the lighting tower due to light emission as the coolant passes through the one or more heat pipes.

According to another aspect of the present invention there is provided a method for adjusting a beam angle of a lighting assembly, the method comprising: identifying a desired beam angle based upon one or more inputs from a user interface; identifying a desired color coordinated temperature (CCT); identifying one or more layers of lighting elements in a lighting tower that, when reflected by a parabolic reflector, generate the desired beam angle, each layer of lighting elements generating a different angle of emitted light with respect to light emitted from another layer of lighting elements; providing a first activation request to the one or more layers of lighting elements in the lighting tower, wherein the first activation request causes activation of the one or more layers of lighting elements in the lighting tower, and wherein the activation of the one or more layers of lighting elements in the lighting tower generates the desired beam angle; identifying one or more adjustments to lighting elements of the one or more layers of the lighting tower that would generate the desired CCT; and providing a second activation request to the lighting elements of the one or more layers of the lighting tower, wherein the second activation request causes the one or more adjustments to the lighting elements of the lighting elements of the one or more layers of the lighting tower and wherein the one or more adjustments causes the lighting elements of the one or more layers of the lighting tower to activate, such that the desired CCT is generated.

In an embodiment, a hardware circuitry-implemented method for providing an adjustable color-correlated temperature ("CCT") includes receiving an indication of a desired CCT from a user interface, determining one or more adjustments to one or more supplementary light sources, that would result in the desired CCT when light from the one or more supplementary light sources is blended with a base light from a base light source, and performing the one or more adjustments to the one or more supplementary light sources to generate the desired CCT.

These described embodiments are only examples of the presently disclosed techniques. Additionally, in an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but may nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

Turning now to the drawings, <FIG> illustrates a lighting system <NUM> that may be suitable to provide lighting for applications such as television and theater sets, film sets, tradeshows, and any one of the range of permanent, semi-permanent, and temporary settings. In the illustrated embodiment, the lighting system <NUM> includes a digital control system <NUM> and one or more lighting assemblies <NUM>. As illustrated, the lighting system <NUM> includes two lighting assemblies <NUM> supported by lighting stands <NUM>. However, the lighting assemblies <NUM> may also be suspended from a lighting rig or supported in other manners.

The digital control system <NUM> includes a controller <NUM> configured to receive inputs from a user and determine outputs to be provided to the lighting assemblies <NUM>. The controller <NUM> includes a user interface <NUM>, a processor <NUM>, and a memory <NUM>. Each lighting assembly <NUM> may include a chassis <NUM>, a parabolic aluminized reflector ("PAR") <NUM>, a lighting assembly controller <NUM>, and a lighting tower <NUM>, among other components. In some embodiments, a lighting assembly <NUM> may be controlled directly from the controller <NUM> such that the lighting assembly does not include an independent controller.

In some embodiments, the memory <NUM> may include one or more tangible, non-transitory, computer-readable media that store instructions executable by the processor <NUM> and/or data to be processed by the processor <NUM>. For example, the memory <NUM> may include random access memory (RAM), read only memory (ROM), rewritable nonvolatile memory such as flash memory, hard drives, optical discs, and/or the like. Additionally, the processor <NUM> may include one or more general purpose microprocessors, one or more application specific processors (ASICs), one or more field programmable logic arrays (FPGAs), or any combination thereof.

As described in greater detail below, the lighting system <NUM> is configured to receive inputs at the user interface <NUM> of the controller <NUM> indicative of a desired beam angle and/or a desired CCT for individual or multiple lighting assemblies <NUM>. For example, a user may provide inputs indicative of a desired beam angle and/or a desired CCT to the user interface <NUM>. A processor <NUM> of the controller <NUM> may then determine specific lighting adjustments, such as a beam angle adjustment or power values to be supplied to specific lights (or lighting elements) of the lighting towers <NUM>, based on information stored in a memory <NUM>. In some embodiments, the lighting assembly controller <NUM> may have a processor and memory and may be configured to determine the specific lighting adjustments. The lighting assembly controller <NUM> may also be configured to control specific lights of the lighting tower <NUM> based on signals received from the controller <NUM>. As such, the controller <NUM> of the digital control system <NUM> may be configured to send signals, via a wired connection <NUM> and/or via a wireless connection <NUM>, to one or more of the lighting assemblies <NUM> to achieve the desired beam angle and the desired CCT. Based on the received signals from the controller <NUM>, the lighting assembly controller <NUM> may output signals to activate individual lights of the lighting tower <NUM>. It is to be appreciated that there are no movable parts within the lighting assemblies <NUM> which need to be moved to provide the different lighting outputs of the lighting assemblies <NUM>. Rather different lighting outputs are achieved by selection of particular elements and layers of the lighting tower <NUM> which have different positional relationships and angular light emission characteristics as is explained in greater detail later.

The light emitted from specific lights of the lighting tower <NUM> is reflected off of the PAR <NUM> and is directed outwardly from the lighting assembly <NUM>. Based upon each specific light's position on the lighting tower <NUM>, the reflected light is directed in a particular direction from the lighting assembly <NUM>. The cumulative reflected light emitted from the lighting assembly <NUM> converges to generate the desired beam angle.

The user interface <NUM> may include a button, a keyboard, a mouse, a trackpad, color-tuning controls, zonal lighting controls, and/or the like to enable user interaction with the controller <NUM>. Additionally, the user interface <NUM> may include an electronic display (not shown) to facilitate providing a visual representation of information, for example, via a graphical user interface (GUI), an application interface, text, a still image, and/or video content. The user interface <NUM> may be a lighting control interface (e.g., digital multiplex ("DMX"), ethernet, Artnet, sACN, Kinet1). In some embodiments, the user interface <NUM> may be a separate component apart from the controller <NUM>. A user may interact with the user interface <NUM> to input a particular beam angle and/or CCT of the lighting assemblies <NUM>. Further, if separate beam angles are input to the user interface <NUM> for individual lighting assemblies <NUM>, the digital control system <NUM> may be configured to communicate with each individual lighting assembly <NUM> via unique protocol-specific addresses. For example, a first lighting assembly <NUM> may have a DMX address of "<NUM>," and a second lighting assembly <NUM> may have a DMX address of "<NUM>.

<FIG> illustrates a flow diagram <NUM> depicting an activity of the lighting system <NUM> of <FIG>. As generally described above, the digital control system <NUM> is configured to receive an input indicative of a desired beam angle. At block <NUM>, the digital control system <NUM> is configured to identify and provide the desired beam angle at the user interface <NUM>. For example, based on the specific inputs to the user interface <NUM>, the digital control system <NUM> may identify the desired beam angle and provide a signal indicative of the desired beam angle. Alternatively, as described below, prior to outputting a signal indicative of the desired beam angle, the digital control system <NUM> may be configured to identify one or more lights of a lighting assembly <NUM> to be activated to achieve the desired beam angle.

At block <NUM>, the controller <NUM> may receive the desired beam angle. For example, a user may provide various inputs to the user interface <NUM> indicative of a desired beam angle. Those inputs may then be sent from the user interface <NUM> to the processor <NUM>. In embodiments where block <NUM> is performed by the lighting assembly controller <NUM>, the lighting assembly controller <NUM> may receive a signal indicative of the desired beam angle.

At block <NUM>, the controller <NUM> is configured to identify one or more lights at a particular position on the lighting tower <NUM> of the lighting assembly <NUM> based at least upon the desired beam angle. As described in detail below, the lighting tower <NUM> may include multiple lights disposed along a length of the lighting tower <NUM>. Activation of certain lights may correspond to a certain beam angle. Therefore, based on the desired beam angle, the controller <NUM> is configured to determine which lights of the lighting tower <NUM> to illuminate to achieve the desired beam angle. In some embodiments, the controller <NUM> may be configured to identify one or more lights at a particular position on the lighting tower <NUM> of the lighting assembly <NUM> based at least upon the desired beam angle.

At block <NUM>, the controller <NUM> is configured to provide an activation request to the one or more lighting assemblies <NUM>. For example, the controller <NUM> may output a signal to a lighting assembly <NUM> via a wired connection <NUM> indicative of the specific lights of the lighting tower <NUM> to activate. In other embodiments, the controller <NUM> may output a signal to a lighting assembly <NUM> via a wireless connection <NUM> indicative of the specific lights of the lighting tower <NUM> to activate. Further, the lighting system <NUM> may be configured such that the controller <NUM> may communicate with the lighting assemblies <NUM> concurrently via both the wired connection <NUM> and the wireless connection <NUM>. In some embodiments, the controller <NUM> may be configured to provide an activation request to the one or more lighting assemblies <NUM>.

At block <NUM>, the lighting assembly controller <NUM> receives the activation request. As described above, the activation request may identify individual lights of the lighting tower <NUM> to activate to achieve the desired beam angle. A signal indicative of the activation request may be received via the wired connection <NUM>, via the wireless connection <NUM>, or via both.

At block <NUM>, the lighting assembly controller <NUM> is configured to activate the one or more lighting assemblies <NUM> based upon the activation request. As described above, the activation request may identify specific lights of the lighting tower <NUM> to activate. The lighting assembly controller <NUM> is configured to output signals to the lighting tower <NUM> to activate the specific lights. With this activation of the lights of the lighting tower <NUM>, the desired beam angle is generated.

<FIG> is a perspective front view of the lighting assembly <NUM> of the lighting system <NUM> of <FIG> according to one embodiment. As illustrated, the lighting assembly <NUM> includes the chassis <NUM>, the PAR <NUM>, the lighting tower <NUM>, and an optional stand <NUM> and rotation handle <NUM>. Although not illustrated, the lighting assembly <NUM> may further include the lighting assembly controller <NUM> configured to control various operations of the lighting assembly <NUM>. In certain embodiments, the lighting assembly <NUM> may include support structures other than or in addition to the stand <NUM> and/or the rotation handle <NUM>. In such embodiments, the lighting assembly <NUM> may be coupled to or suspended from a lighting rig, coupled to another type of stand, or coupled to other components configured to support the lighting assembly <NUM>.

The lighting tower <NUM> is fixed relative to the chassis <NUM> and the PAR <NUM>. In traditional lighting systems using a parabolic optic, to adjust a beam angle, a bulb disposed in the parabolic optic is moved <NUM>-<NUM> inches relative to the parabolic optic using a mechanical actuator. For the lighting assembly <NUM>, instead of moving the light source, the activated LEDs (which make up the lighting elements in this embodiment) change, altering the location of the source of the light digitally by simply selecting different LEDs of the lighting tower <NUM> to illuminate. By lighting more LEDs in different locations, the lighting assembly <NUM> has more flexibility to change the beam shape. This can be performed with chip-on-board configurations ("COBs"), discrete LEDs, or a combination of the two. As described in reference to <FIG>, which illustrates one lighting tower embodiment, the lighting tower <NUM> includes multiple LED light source layers extending in a direction indicated by reference numeral <NUM>. The LED light source layers are configured to activate and illuminate independently of one another. Accordingly, to adjust the beam angle to another desired beam angle, the location of activated LEDs may be adjusted by non-mechanical means. For example, to achieve a desired beam angle, only a portion of the LED light source layers may be illuminated. Additionally, all of the LED light source layers may be illuminated. By including LEDs in the lighting tower <NUM>, the system may achieve longer working lifespans (-<NUM>,<NUM> hours) compared to traditional lighting systems. Whilst LEDs have been described as preferable lighting elements in the described embodiments, it is to be appreciated that the present disclosure is not restricted to the use of LEDs as lighting elements. Other light sources, for example laser diodes, can be used and a significant proportion of the benefits of the present invention can still be achieved.

The light emitted by the lighting tower <NUM> is projected radially from the lighting tower <NUM> toward interior rings <NUM> of the PAR <NUM>. According to the invention, the lighting tower <NUM> is configured to provide dynamically changeable CCTs. The PAR <NUM> includes the interior rings <NUM> to blend light emitted by the LEDs (various CCTs and colors). For example, some LED light sources may be configured to emit light at a first CCT and/or color, and other LED light sources may be configured to emit light at a second CCT and/or color. Further, the CCT and the color may each be independently controlled at the light sources. Light directed toward the PAR <NUM> from the lighting tower <NUM> is then reflected outward by the PAR <NUM> in a direction opposite the chassis <NUM>. As illustrated, the interior rings <NUM> are concentric about the lighting tower <NUM>. The interior rings <NUM> of the PAR <NUM> closer to the chassis <NUM> are smaller in diameter than interior rings further from the chassis <NUM>. As such, an interior surface of the PAR <NUM> forms a parabola extending from an interior ring <NUM> having the smallest diameter (i.e., the interior ring <NUM> closest to the chassis <NUM>) to an interior ring having the largest diameter (i.e., the interior ring <NUM> farthest from the chassis <NUM>). The parabolic shape of the PAR <NUM> allows light reflected by the PAR <NUM> to focus at a focal point in front of the lighting assembly <NUM>. The specific focal point may correspond to a specific beam angle. Thus, a desired beam angle may correspond to a desired focal point.

The lighting assembly <NUM> is also configured to conduct heat more efficiently than traditional lighting systems. Because the chassis <NUM>, the PAR <NUM>, and the lighting tower <NUM> are stationary relative to one another and physically connected together, heat generated by the lighting tower <NUM> may be conducted to the chassis <NUM> and the PAR <NUM>. As described above, in traditional lighting systems, a bulb disposed at the center of a parabolic optic is configured to move relative to the parabolic optic and/or relative to the base. This movement means the bulb is not rigidly coupled to the parabolic optic and/or to the base, so heat transfer between the bulb and the rest of a parabolic optic may be inefficient.

Because the chassis <NUM> and the PAR <NUM> are fixed relative to the lighting tower <NUM>, the chassis <NUM> and/or the PAR <NUM> may be configured to act as a heat sink for the lighting assembly <NUM>. For example, heat transfer and heat dissipation from the lighting tower <NUM> may be enhanced based on the material and structure of the chassis <NUM> and the PAR <NUM>. For example, the chassis <NUM> and the PAR <NUM> may be constructed using aluminum, which is one of the highest efficiency reflectors (up to <NUM>%) as well as one of the most thermally conductive metals. In this manner, the components of the lighting assembly <NUM> create a thermal circuit that integrates the surface area of the chassis <NUM> and the PAR <NUM> for use as a large surface area heat sink for the lighting tower <NUM>.

In some embodiments, noise from fans may be undesirable in motion picture and television equipment. This multi-purpose heat sink/optic/housing enables reduced weight and can eliminate the need for such fans, resulting in reduced noise and reduced manufacturing costs. The use of aluminum for the chassis and PAR also assists as it is lightweight.

In some embodiments, additional heat distribution may be desired. Accordingly, in the embodiment of <FIG>, fins <NUM> are added to the chassis <NUM> and may be added to the exterior of the PAR <NUM> to increase the surface area of the heat sink capability. Heat may be dissipated through the surface area via clean cool air reacting with the heat distributed to the fins.

Thermal cooling may further be enhanced with the inclusion of heat pipes in (or adjacent to) the lighting tower <NUM> and/or the chassis <NUM>. The heat pipes may be embedded in a core of the lighting tower <NUM> and may be used to move heat efficiently from the lighting tower <NUM> to the chassis <NUM> and/or the PAR <NUM>. To facilitate heat transfer, the heat pipes may be made of copper. The heat pipes may make a thermal circuit that connects the lighting tower <NUM> thermally to the chassis <NUM>. Because the lighting tower <NUM> and the chassis <NUM> are fixed relative to one another, the heat pipes may extend through the lighting tower <NUM> and into the chassis <NUM>. In the chassis <NUM>, the heat pipes may extend radially outward from the lighting tower <NUM> to form "L" shapes. For example, the lighting assembly <NUM> may include four individual heat pipes extending through the lighting tower <NUM> and into the chassis <NUM>. Each heat pipe may extend radially outward.

In traditional lighting systems, because a bulb is moved relative to another housing portion, heat pipes or similar forms of heat transfer may be impractical. With the lighting assembly <NUM>, heat transfer may be enhanced with the inclusion of heat pipes. The heat pipes may include distilled water in a vacuum. The distilled water may experience phase changes within the heat pipes to facilitate heat transfer. For example, water in a portion of a heat pipe in the lighting tower <NUM> may be a vapor. As the vapor travels down the heat pipe toward the chassis <NUM>, the temperature may decrease and the vapor may change to liquid in the chassis <NUM>. Example embodiments of lighting towers having heat pipes are provided below in reference to <FIG>, <FIG>, and <FIG>.

The sizes of both the lighting tower <NUM> and the PAR <NUM> may be proportional to one another and may vary. The lighting tower <NUM> may be <NUM> in length, as generally indicated by arrow <NUM>. Etendue, a property of light that characterizes the distribution of light for an area and an angle, implies that a light source and a reflector may be proportional to one another to generate light for a specific area and a specific angle. For example, in an exemplary embodiment, a light source (e.g., base light source <NUM>, first supplementary light source <NUM>, and second supplementary light source <NUM> described below and as shown in <FIG>) may also be proportional to the PAR <NUM>. A light source that is <NUM> in diameter may correspond to a reflector (e.g., the PAR <NUM>) <NUM> in diameter. A light source <NUM> in diameter may correspond to a reflector <NUM> in diameter. Additionally, a light source <NUM> in diameter may correspond to a reflector <NUM> in diameter.

<FIG> is a perspective front view of a lighting assembly <NUM> according to another embodiment that may be employed within the lighting system <NUM> of <FIG>. As illustrated, the lighting assembly <NUM> includes a chassis <NUM>, a PAR <NUM>, a lighting tower <NUM>, and an optional stand <NUM> and rotation handle <NUM>. Although not illustrated, the lighting assembly <NUM> may further include the lighting assembly controller <NUM> configured to control various operations of the lighting assembly <NUM>. In certain embodiments, the lighting assembly <NUM> may include support structures other than or in addition to the stand <NUM> and/or the rotation handle <NUM>. In such embodiments, the lighting assembly <NUM> may be coupled to or suspended from a lighting rig, may be coupled to another type of stand, may rest on the ground or another surface, or may be coupled to other components configured to support the lighting assembly <NUM>.

As illustrated, the lighting tower <NUM> is positioned generally at a center of the PAR <NUM>. The lighting tower <NUM> is coupled to the chassis <NUM> at a first end <NUM> via supports <NUM>, which extend from the first end <NUM> to the chassis <NUM>. Additionally, a second end <NUM> of the lighting tower <NUM> (e.g., a base of the lighting tower <NUM>) is coupled to the PAR <NUM>. As such, the PAR <NUM>, the supports <NUM>, and other portions of the lighting assembly <NUM> may structurally support the lighting tower <NUM> within the lighting assembly <NUM>.

As described in greater detail below, the lighting tower <NUM> includes layers of chip scale packaging arrays ("CSP" arrays) having multiple LEDs. The CSP arrays are configured to activate and illuminate independently of one another. Accordingly, to adjust the beam angle to another desired beam angle, the activated CSP arrays may be adjusted by non-mechanical means. For example, to achieve a desired beam angle, only a portion of the CSP arrays, at one or more predetermined locations, may be illuminated. Additionally, all of the CSP arrays may be illuminated. By including the LEDs of the CSP arrays in the lighting tower <NUM>, the system may achieve longer working lifespans compared to traditional lighting systems. As explained previously, the lighting elements need not be restricted to the LEDs in this embodiment and other forms of lighting elements can be used.

The light emitted by the lighting tower <NUM> is projected radially from the lighting tower <NUM> toward the PAR <NUM>. According to the invention, the lighting tower <NUM> is configured to provide dynamically changeable CCTs. The PAR <NUM> may blend light emitted by the LEDs (various CCTs and colors). For example, some LED light sources may be configured to emit light at a first CCT and/or color, and other LED light sources may be configured to emit light at a second CCT and/or color. Further, the CCT and the color may each be independently controlled at the light sources. Light directed toward the PAR <NUM> from the lighting tower <NUM> is then reflected outward by the PAR <NUM> in a direction opposite the chassis <NUM>, as indicated by arrow <NUM>.

The lighting assembly <NUM> may also include safety glass <NUM> coupled to the chassis <NUM> and positioned outwardly from the lighting tower <NUM>. The safety glass <NUM> may substantially prevent a user from touching the PAR <NUM> and/or the lighting tower <NUM>, which may become hot during operation. Additionally or alternatively, the safety glass <NUM> may substantially prevent debris (e.g., water, dust, insects, etc.) from entering the lighting assembly <NUM> to provide a clean operating environment for the lighting tower <NUM>. As described in further detail below, a positioning of vents <NUM> of the lighting tower <NUM> may also protect from water intrusion. In certain embodiments, the lighting tower <NUM> may have an Ingress Protection Rating of IP33. For example, the lighting tower <NUM> may be protected from tools and wires greater than <NUM> millimeters ("mm"), as well as water spray at an angle up to <NUM> degrees from vertical, from entering an interior of the lighting tower <NUM>.

The lighting assembly <NUM> is also configured to efficiently conduct heat. Because the chassis <NUM>, the PAR <NUM>, and the lighting tower <NUM> are stationary relative to one another, heat generated by the lighting tower <NUM> may be conducted to the chassis <NUM> and the PAR <NUM>. As such, the chassis <NUM> and/or the PAR <NUM> may be configured to act as a heat sink for the lighting assembly <NUM>. For example, heat transfer and heat dissipation from the lighting tower <NUM> may be enhanced based on the material and structure of the chassis <NUM> and the PAR <NUM>. The chassis <NUM> and the PAR <NUM> may be constructed using aluminum, which is one of the highest efficiency reflectors (up to <NUM>%) as well as one of the most thermally conductive metals. In this manner, the components of the lighting assembly <NUM> create a thermal circuit that integrates the surface area of the chassis <NUM> and the PAR <NUM> for use as a large surface area heat sink for the lighting tower <NUM>. The heat exchange of the lighting assembly <NUM> may further be enhanced via active cooling, as described in greater detail in reference to <FIG> and <FIG>. For example, the vents <NUM> may enable air flow into the lighting assembly <NUM> to actively cool the lighting assembly <NUM>.

<FIG> is a perspective view of the lighting tower <NUM> of the lighting assembly <NUM> of <FIG>. The lighting tower <NUM> may include light source layers <NUM> with base light sources (lighting elements) <NUM> disposed on each side of the tower at the respective light source layers <NUM>. The light source (lighting element) layers generally extend in the direction <NUM>, as previously illustrated in <FIG>. In the illustrated embodiment, the lighting tower <NUM> includes <NUM> light source layers <NUM> (or levels of light sources). However, in some embodiments, the lighting tower may include more or less light sources layers <NUM> (e.g., <NUM> layers, <NUM> layers, <NUM> layers, <NUM> layers, <NUM> layers, <NUM> layers, etc.). Additional layers may provide more granularity in beam angle adjustment, while a reduced number of layers may provide certain sizing or cost efficiencies. Further, in the illustrated embodiment, each light source layer <NUM> includes <NUM> sides with a single base light source <NUM> disposed on each side. However, in some embodiments, each light source layer <NUM> may include more or less sides (e.g., <NUM> sides, <NUM> sides, <NUM> sides, <NUM> sides, <NUM> sides, etc.). An increased number of sides may result in increased light intensity, while a decreased number of sides may also provide certain sizing or cost efficiencies. In certain embodiments, each side of each light source layer <NUM> may include additional light sources (e.g., <NUM> light sources, <NUM> light sources, <NUM> light sources, <NUM> light sources, etc.). The lighting tower <NUM> may also be a cylindrical shape such that there are no distinct sides. In this case, curved LEDs, namely LEDs with a curved light-emitting surface, could be used in each light source layer <NUM>.

Each base light source (lighting element) <NUM> may include a single LED or multiple LEDs. For example, each base light source <NUM> may include multiple LEDs in a COB configuration, as discrete LEDs, or a combination of COBs and discrete LEDs. In some embodiments, the LEDs may be configured in CSP configurations. In CSP configurations, LEDs may be disposed directly on electronic circuitry of the lighting tower <NUM>. Additionally, while each base light source <NUM> is illustrated as a circle occupying a majority of the surface area of each side of each lighting source layer <NUM>, each base light source <NUM> may a different size and/or a different shape. For example, the lighting tower <NUM> may include base light sources <NUM> of different sizes and/or different shapes (e.g., triangles, squares, pentagons, hexagons, etc.).

The lighting tower <NUM>, combined with the PAR <NUM>, significantly increases the number of LEDs that can be fit into a small source size, because the lighting tower <NUM> emits the light laterally. For example, in the illustrated embodiment, light is emitted from <NUM> vertical sides. Using a side emission tower allows for <NUM> times or greater LEDs to be placed into the same three-dimensional space. The lighting assembly <NUM> may generate a brighter LED light in a more compact fixture compared to traditional, flat, and planer LED sources that emit light in only one direction. Because the PAR <NUM> may redirect lateral light emitted by the lighting tower <NUM>, the lighting assembly <NUM> leverages that reflector capability and may include LEDs on all sides of the lighting tower <NUM>. In an aspect, the ability to digitally control which lighting source layer <NUM> is to be turned on creates a motionless focused beam LED light, eliminating the need for a focus knob (because the beam angle may be controlled using DMX controls) and a moving lamp.

<FIG> illustrate lighting angles that may be generated by the lighting system <NUM> of <FIG>. As described above, the lighting tower <NUM> includes multiple light source layers <NUM> that may be selectively activated to generate various beam angles. In the embodiment of <FIG>, two light source layers 501A are activated, as indicated by illuminated layer lights 502A. The two activated light source layers 501A are the light source layers disposed furthest from the PAR <NUM>. Light emitted from the activated light source layers 501A is projected radially outward toward the PAR <NUM>, as generally indicated by arrows 504A. The light is then reflected by the PAR <NUM> and redirected as indicated by arrows 506A. The activated light source layers 501A are generally positioned at a focal point of the PAR <NUM> such that the beams of light reflected by the PAR <NUM> (i.e., arrows 506A) are generally parallel and generate a focused beam angle. The light indicated by arrows 506A may be directly toward a target.

<FIG> illustrates two activated light source layers 501B positioned at a portion of the lighting tower <NUM> closest to the PAR <NUM>, as indicated by illuminated layer lights 502B. Light emitted from the activated light source layers 501B is projected radially outward toward the PAR <NUM>, as generally indicated by arrows 504B. The light is then reflected by the PAR <NUM> and redirected as indicated by arrows 506B. The activated light source layers 501B are generally positioned close to the PAR <NUM> such that the beams of light reflected by the PAR <NUM> (i.e., arrows 506B) generate a wider pattern of light and a wide beam angle.

<FIG> illustrates the lighting tower <NUM> with every light source layer <NUM> as an activated light source layer 501C, as indicated by illuminated layer lights 502C. Light emitted from the activated light source layers 501C is projected radially outward toward the PAR <NUM>, as generally indicated by arrows 504C. The light is then reflected by the PAR <NUM> and redirected as indicated by arrows 506C. By activating all the light source layers <NUM>, a more varied and wider beam angle and shape may be generated. While the illustrated embodiments of <FIG> include only ends of the lighting tower <NUM> activated or the entire lighting tower <NUM> activated, it should be appreciated that other portions of the lighting tower <NUM> may be activated independent of one another (i.e., only a middle portion of the lighting tower <NUM> may be activated, two-thirds of the lighting tower <NUM> may be activated, activating one or more sides of all the light source layers simultaneously, etc.).

<FIG> is a perspective view of the PAR <NUM> of the lighting assembly <NUM> of <FIG>. As illustrated, an opening <NUM> is formed within the PAR <NUM> through which the lighting tower <NUM> may extend. For example, the lighting tower <NUM> may extend from the opening <NUM> and into an interior <NUM> of the PAR <NUM>. The PAR <NUM> includes an inner ring <NUM> and an outer ring <NUM> configured to reflect light emitted from the lighting tower <NUM> generally in a direction <NUM>. For example, light emitted generally radially by the lighting tower <NUM> may be reflected and redirected by the inner ring <NUM> and the outer ring <NUM> in the direction <NUM> to provide a desired beam angle and/or light pattern. In certain embodiments, the PAR <NUM> may include more or fewer rings (e.g., one ring, three rings, four rings, ten rings, etc.).

<FIG> is a cross-sectional view of the PAR <NUM> of <FIG>. As illustrated, the inner ring <NUM> is generally smaller than the outer ring <NUM> in both diameter and length. An inner diameter <NUM> of the inner ring <NUM> (e.g., a diameter adjacent to the opening <NUM> or a diameter of the opening <NUM>) may be about <NUM>, and an outer diameter <NUM> of the inner ring <NUM> (or an inner diameter of the outer ring <NUM>) may be about <NUM>. An outer diameter <NUM> of the outer ring <NUM> may be about <NUM>. Additionally, a length <NUM> (or height) of the inner ring <NUM> between the opening <NUM> and the outer ring <NUM> may be about <NUM>, and a length <NUM> (or height) of the outer ring <NUM> extending from the inner ring <NUM> may be about <NUM>. In other embodiments, the diameter <NUM>, the diameter <NUM>, the diameter <NUM>, the length <NUM>, the length <NUM>, or a combination thereof, may be other suitable dimensions to enable the PAR <NUM> to reflect light from the lighting tower <NUM> in the direction <NUM> to provide a desired beam angle and/or light pattern.

<FIG> is a front view of the lighting assembly <NUM> of <FIG> with the lighting tower <NUM> positioned within the interior <NUM> of the PAR <NUM>. As illustrated, the lighting tower <NUM> includes a hexagonal shape that may extend within the interior <NUM> of the PAR <NUM>. As such, the lighting tower <NUM> includes six sides <NUM> with each side <NUM> coupled to one or more layers of CSP arrays <NUM> (e.g., the CSP arrays <NUM> may be mounted to the sides <NUM> or may be integral to the sides <NUM>). In certain embodiments, the lighting tower <NUM> may include more or fewer sides <NUM> (e.g., three sides <NUM>, four sides <NUM>, seven sides <NUM>, ten sides <NUM>, etc.) with some or all of the sides <NUM> coupled to the layer(s) of CSP arrays <NUM>. Accordingly, each layer of lighting elements is positioned around the longitudinal axis of the lighting tower and in at least one embodiment this provides <NUM> degrees of potential illumination about the lighting tower <NUM>.

The CSP arrays <NUM> include rows of LED's <NUM> configured to emit light of varying temperatures and colors. As such, the sides <NUM> of the lighting tower <NUM>, certain layers of the CSP arrays <NUM>, individual CSP arrays <NUM>, or a combination thereof, may be controlled to emit light and provide a desired beam angle and/or light pattern when reflected by the PAR <NUM>. In the illustrated embodiment, a first CSP array 542A positioned on a first side 540A and a second CSP array 542B positioned on a second side 540B are emitting light, as indicated by arrows 546A and 546B, respectively. The light emitted by the LED's <NUM> of the CSP arrays 542A and 542B is projected radially outward from the lighting tower <NUM> and toward the PAR <NUM>. The PAR <NUM> may reflect the light outwardly from the lighting assembly <NUM>.

In certain embodiments, other CSP arrays <NUM> along other respective sides <NUM> may be controlled to emit light. For example, the CSP arrays <NUM> on two adjacent sides <NUM> may be controlled to emit light (turned on), while the remaining CSP arrays <NUM> on the remaining sides <NUM> may be controlled to not emit light (turned off). In another example, the CSP arrays <NUM> on all sides <NUM> may be controlled to emit light, or only three, four, or five of the CSP arrays <NUM> on three, four, or five respective sides <NUM> may be controlled to emit light. As such, the lighting tower <NUM> may be controlled to emit light in varying directions, symmetrically, and asymmetrically. As described in greater detail below, individual layers of the CSP arrays <NUM> on the sides <NUM> may also be controlled to emit light. As such, the CSP arrays <NUM> on each side <NUM>, along with the individual layers of CSP arrays <NUM> may be controlled to emit light and provide a desired beam angle and/or light pattern when reflected by the PAR <NUM>. Each CSP array <NUM> may also be controlled with independent color and independent CCT settings.

<FIG> are diagrams of lighting angles and lighting patterns that may be generated by the lighting system <NUM> of <FIG>. As illustrated in <FIG>, the lighting tower <NUM> includes light source layers <NUM> disposed along the length of the lighting tower <NUM> that may be selectively activated to generate various beam angles and/or lighting patterns. Each light source layer <NUM> extends around the lighting tower <NUM> and includes a single CSP array <NUM> on each side <NUM>. The illustrated embodiment of the lighting tower <NUM> includes nine light source layers <NUM>. In certain embodiments, the lighting tower <NUM> may include more or fewer light source layers <NUM> per side (e.g., one light source layer <NUM>, two light source layers <NUM>, four light source layers <NUM>, ten light source layers <NUM>, twenty light source layers <NUM>, etc.) and a different number of sides (e.g., <NUM> sides, 4sides, <NUM> sides, <NUM> sides, <NUM> sides, <NUM> sides, <NUM> sides, etc.).

Each side <NUM> of CSP arrays <NUM>, each light source layer <NUM> of CSP arrays <NUM>, and each individual CSP array <NUM> may be individually controlled to generate a desired beam angle, a desired CCT, and/or a desired color. For example, adjusting which light source layers <NUM> are illuminated and the intensity of light provided by the illuminated light source layers <NUM> allows for adjustment to the desired beam angle. Additionally, adjusting which light source layers <NUM> are illuminated and the intensity at which each light source layer <NUM> is illuminated allows for varying CCT's to be generated. In general, illuminating and/or activating only the light source layers <NUM> at a base <NUM> of the lighting tower <NUM> adjacent to the PAR <NUM> (e.g., the bottom two or three light source layers <NUM>) allows for a relatively small beam angle. As more light source layers <NUM> are illuminated along the length of the lighting tower <NUM> (e.g., toward a top <NUM> of the lighting tower <NUM>), the beam angle may increase. As such, controlling the illumination and light intensity of each light source layer <NUM> allows for varying beam angles and varying CCT's related to certain lighting effects. For example, a large beam angle with a high CCT (e.g., a warm CCT) that may provide an appearance similar to a positive, inviting character, such as an angel. A small beam angle with a low CCT (e.g., a cool CCT) may provide an appearance of a cold, harsh character, such as a vampire.

By way of specific example, to provide a beam angle of fifteen degrees, light source layers 550A and 550B adjacent to the base <NUM> of the lighting tower <NUM> may be illuminated to a first intensity, and light source layer 550C (e.g., a third light source layer <NUM> from the base <NUM>) may be illuminated to a second intensity that is about half of the first intensity. To provide a beam angle of twenty degrees, the light source layers 550B and 550C may be illuminated to a first intensity, and the light source layer 550A may be illuminated to a second intensity that is about thirty percent of the first intensity. To provide a beam angle of thirty degrees, the light source layers 550B and 550C may be illuminated to a first intensity, light source layer 550D may be illuminated to a second intensity that is about forty percent of the first intensity, and the light source layer 550A may be illuminated to a third intensity that is about thirty percent of the first intensity. To provide a beam angle of forty degrees, light source layers 550B, 550C, 550D, 550E, and 550F may be illuminated to a first intensity, and the light source layer 550A may be illuminated to a second intensity that is about ten percent of the first intensity. To provide a beam angle of fifty degrees, light source layers 550B, 550C, 550D, 550E, 550F, <NUM>, <NUM>, and 550I may be illuminated to a first intensity, and the light source layer 550A may be illuminated to a second intensity that is about ten percent of the first intensity. To provide other beam angles, other combinations of the light source layers <NUM> may be illuminated at varying relative intensities.

As illustrated in <FIG>, every light source layer <NUM> on two sides 540A and 540B is activated (e.g., eighteen total CSP arrays <NUM> are illuminated) such that the two sides 540A and 540B are emitting light outwardly along the entire length of the lighting tower <NUM>, as indicated by arrows <NUM>, that is reflected by the PAR <NUM>, as indicated by arrows <NUM>. The light reflected by the PAR <NUM> provides a lighting pattern <NUM> on a surface. For example, the lighting pattern <NUM> may be spotlight focused on an object, a person, an animal, or scenery. As illustrated, the lighting pattern <NUM> is generally circular and a brightness of the lighting pattern <NUM> is generally even. Additionally, the embodiment of <FIG> may produce a beam angle of about <NUM> degrees (e.g., a size of the lighting pattern <NUM>). As described in greater detail below, the beam angle and/or the lighting pattern provided by the lighting assembly <NUM> may be adjusted by activating and illuminating only certain sides <NUM> and/or only certain light source layers <NUM>.

In <FIG>, two lower light source layers 550D and 550E on the two sides 540A and 540B are activated (e.g., four total CSP arrays <NUM> are illuminated) such that only the light source layers 550D and 550E on the two sides 540A and 540B are emitting light outwardly, as indicated by arrows <NUM>, that is reflected by the PAR <NUM>, as indicated by arrows <NUM>. The light reflected by the PAR <NUM> provides a lighting pattern <NUM>. The lighting pattern <NUM> is generally circular and generally brighter toward the center (e.g., a center portion <NUM> of the lighting pattern <NUM> is generally brighter than an outer portion <NUM> of the lighting pattern <NUM>). Additionally, the embodiment of <FIG> may produce a beam angle of about <NUM> degrees (e.g., a size of the lighting pattern <NUM> or a size of the center portion <NUM> of the lighting pattern <NUM>). As additional and/or other light source layers <NUM> are activated down the length of the lighting tower <NUM>, such as toward a light source layer 550F, the beam angle and/or a focal size of the lighting pattern provided by the lighting assembly <NUM> may generally increase.

In <FIG>, light source layers 550D, 550E, <NUM>, <NUM>, and <NUM> on the side 540B are activated (e.g., five total CSP arrays <NUM> are illuminated) such that only CSP arrays <NUM> on the side 540B are emitting light outwardly, as indicated by arrows <NUM>, that is reflected by the PAR <NUM>, as indicated by arrows <NUM>. The light reflected by the PAR <NUM> provides a lighting pattern <NUM>. The lighting pattern <NUM> is generally circular and a brightness of the lighting pattern <NUM> is generally even. Additionally, the lighting pattern <NUM> of <FIG> is generally smaller compared to the lighting patterns <NUM> and <NUM> of <FIG> and <FIG>, respectively. As such, the CSP arrays <NUM> of the lighting tower <NUM> may be controlled, such as by activating only CSP arrays <NUM> on certain sides <NUM> or on certain light source layers <NUM>, to provide a desired lighting pattern and/or beam angle.

<FIG> illustrates an embodiment of the lighting tower <NUM> of <FIG>. The illustrated embodiment includes two light source layers <NUM>. Each light source layer <NUM> includes <NUM> sides <NUM>. Base light sources <NUM> are included on <NUM> sides 403A of each light source layer <NUM>, and first supplementary light sources <NUM> and second supplementary light sources <NUM> are included on the other <NUM> sides 403B of each light source layer <NUM>. This embodiment of the lighting tower <NUM> is configured to emit and blend a base color "M" and supplementary colors "L" and "N" to generate a desired color of light at a desired CCT. Base light spectrum "M" is designed to provide the core light needed for all CCTs from <NUM> to <NUM> (e.g., using the base light sources <NUM>). Color tuning LEDs (e.g., first supplementary light sources <NUM> and second supplementary light sources <NUM>) offer the specialized additive spectrums "L" and "N" needed to create light ranging from <NUM> to <NUM> which is the preferred CCT range for adjustable motion picture and television lights, as depicted in <FIG>.

The spectrum of the first supplementary light sources <NUM> are used to add (or blend) the color onto the base color "M" needed to make <NUM> Kelvin ("K") CCT (which may be suitable for simulating indoor lighting). The second supplementary light sources <NUM> provide the spectrum added onto the base color "M" needed to create the <NUM> (which may be suitable for simulating outdoor lighting) in this example. The same principle may be applied to generate CCTs ranging from <NUM> to <NUM>. This approach allows the base light sources <NUM> to provide approximately <NUM>% of the light, making this system <NUM>% more efficient than the traditional "bi-color" <NUM>-<NUM> blending systems. Thus, the light emitted by the base light sources <NUM>, the first supplementary light sources <NUM>, and the second supplementary light sources <NUM> may be blended to generate light at a desired color and CCT.

<FIG> illustrates an embodiment of the lighting tower <NUM> of <FIG>. As described above, each side <NUM> of the lighting tower <NUM> includes nine CSP arrays <NUM> such that nine light source layers <NUM> are formed along the lighting tower <NUM> (e.g., each light source layer <NUM> includes six CSP arrays <NUM>, and the lighting tower <NUM> includes <NUM> total CSP arrays <NUM>). In certain embodiments, the lighting tower <NUM> may include more or fewer sides <NUM> and/or more or fewer light source layers <NUM>. As described herein, the CSP arrays <NUM> may be controlled to achieve a desired beam angle and/or a desired lighting pattern. Further, each CSP array <NUM> may be independently controlled to emit a particular CCT. The light emitted from the activated CSP arrays <NUM> may be reflected by the PAR <NUM> to achieve the desired beam angle and/or the desired lighting pattern.

In the illustrated embodiment, a length <NUM> of the lighting tower <NUM> is generally longer than a width <NUM>. For example, the length <NUM> may be about <NUM>, and the width <NUM> may be about <NUM>. In other embodiments, the length <NUM> and/or the width <NUM> of the lighting tower <NUM> may be other suitable dimensions. Further, in some embodiments, the lighting tower <NUM> may be wider than it is tall. For example, the length <NUM> may be less than the width <NUM>. In certain embodiments, the length <NUM> may be generally equal to the width <NUM>. In some embodiments, the lighting tower <NUM> may be controlled to provide different colors when different CSP arrays within the lighting tower <NUM> have different colors or different LEDs within a same CSP array have different colors. In these embodiments, the CCT and color for the lighting tower <NUM> may be independently controlled.

<FIG> is an illustration of the CSP array <NUM> of the lighting tower <NUM> of <FIG>. The CSP array <NUM> includes LED's <NUM> configured to emit light at a desired CCT. As illustrated, the CSP array <NUM> includes sixty LED's <NUM> arranged in six rows <NUM> and ten LED's <NUM> in each row <NUM>. In certain embodiments, the CSP array <NUM> may include more or fewer LED's <NUM>. Further, in some embodiments, the lighting tower <NUM> may include CSP arrays <NUM> having varying amounts of LED's <NUM> (e.g., some CSP arrays <NUM> may have more LED's <NUM> than other CSP arrays <NUM>).

The CSP array <NUM> includes wired connections <NUM> configured to provide power and/or communication to the LED's <NUM> and the CSP array <NUM> generally. For example, activating the LED's <NUM> of the CSP array <NUM> and/or achieving the desired CCT may be accomplished via the wired connections <NUM>. In certain embodiments, the CSP array <NUM> may be coupled to the lighting tower <NUM> via the wired connections <NUM>.

<FIG> is a flow diagram <NUM> for controlling a beam angle, a color, and/or a CCT in an exemplary embodiment of the lighting system <NUM> of <FIG>. Each block of flow diagram <NUM> (e.g., blocks <NUM>, <NUM>, <NUM>, and <NUM>) may be performed by the digital control system <NUM> and/or the lighting assembly controller <NUM>. As described above, the lighting system <NUM> may be configured to provide desired beam angles, colors, and/or CCT's. For example, a user may provide inputs related to a beam angle, a color, and/or a CCT to the user interface <NUM> of the digital control system <NUM> of <FIG>. At block <NUM>, based on the inputs, the digital control system <NUM> may identify and/or provide a desired beam angle, a desired color, and/or a desired CCT to be generated by the lighting system <NUM> or by an individual lighting assembly <NUM> based on the user inputs. For example, a lighting operator may indicate a particular desired beam angle, color, and/or CCT via the user interface <NUM>.

At block <NUM>, the controller <NUM> may determine which light source layers <NUM> of the lighting tower <NUM> or which light source layers <NUM> of the lighting tower <NUM> to illuminate and the appropriate intensity for each illuminated light source layer <NUM> and <NUM> that will achieve the desired beam angle, the desired color, and the desired CCT. For example, illumination of certain light source layers <NUM> at certain intensities may achieve the desired beam angle, the desired color, and the desired CCT.

At block <NUM>, the controller <NUM> may provide an activation request to the lighting assemblies <NUM> and/or <NUM>. For example, the controller <NUM> may output a signal to a lighting assembly <NUM> and/or <NUM> via a wired connection <NUM> and/or a wireless connection <NUM> indicative of the specific light source layers <NUM> and/or <NUM> of the lighting towers <NUM> and <NUM>, respectively, to activate and a corresponding amount of power (e.g., the respective intensities) to be supplied to the light source layers <NUM> and/or <NUM>. In some embodiments, the controller <NUM> may be configured to provide the activation request to the lighting assemblies <NUM> and/or <NUM>.

At block <NUM>, the lighting assembly controller <NUM> may activate the lighting assemblies <NUM> and/or <NUM> based upon the activation request. As described above, the activation request may identify specific light source layers <NUM> and/or <NUM> of the lighting towers <NUM> and <NUM>, respectively, to activate and the corresponding power to be supplied to each light source layer <NUM> and/or <NUM>. The lighting assembly controller <NUM> may output signals to the lighting towers <NUM> and <NUM> to activate the specific lights and provide the specific amounts of power. With this activation of the light source layers <NUM> and/or <NUM>, the desired beam angle, the desired color, and/or the desired CCT may be provided.

<FIG> is a flow diagram <NUM> for controlling a CCT in an exemplary embodiment of the lighting system <NUM> of <FIG>. Each block of flow diagram <NUM> (e.g., blocks <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM>) may be performed by the digital control system <NUM> and/or the lighting assembly controller <NUM>. As described above, the lighting system <NUM> may be configured to blend light of varying CCTs to generate a desired CCT. A user may provide inputs to the user interface <NUM> of the digital control system <NUM> of <FIG>. At block <NUM>, based on the inputs, the digital control system <NUM> may identify and/or provide a desired CCT to be generated by the lighting system <NUM> or by an individual lighting assembly <NUM>. For example, a lighting operator may indicate a particular desired CCT via the user interface <NUM>.

At block <NUM>, the controller <NUM> may receive the desired CCT. For example, a user may provide various inputs to the user interface <NUM> indicative of a desired CCT. Those inputs may then be sent from the user interface <NUM> to the processor <NUM>. In embodiments where block <NUM> is performed by the lighting assembly controller <NUM>, the lighting assembly controller <NUM> may receive a signal indicative of the desired CCT.

At block <NUM>, the controller <NUM> may identify supplemental lights (e.g., first supplementary light sources <NUM> and second supplementary light sources <NUM>) to be added to the base lights (e.g., base light sources <NUM>) of the lighting tower <NUM> based at least upon the desired CCT. The controller <NUM> may also determine the power to be supplied to each base light and supplement light. By varying which lights are activated and the amount of power supplied to the activated lights, a desired CCT ranging from <NUM> to <NUM> may be generated using base lighting of the base light source <NUM> supplemented by lighting from the first supplemental light source <NUM> and/or the second supplemental light source <NUM>. Therefore, based at least on the desired CCT, the controller <NUM> may determine which base lights and supplement of the lighting tower <NUM> to activate and the amount of power to supply to each light to achieve the desired CCT. In some embodiments, the controller <NUM> may be configured to identify supplemental lights (e.g., first supplementary light sources <NUM> and second supplementary light sources <NUM>) to be added to the base lights (e.g., base light sources <NUM>) of the lighting tower <NUM> based at least upon the desired CCT.

At block <NUM>, the controller <NUM> may provide an activation request to the one or more lighting assemblies <NUM>. For example, the controller <NUM> may output a signal to a lighting assembly <NUM> via a wired connection <NUM> indicative of the specific lights of the lighting tower <NUM> to activate and a corresponding amount of power to be supplied to individual lights. In other embodiments, the controller <NUM> may output a signal to a lighting assembly <NUM> via a wireless connection <NUM> indicative of the specific lights of the lighting tower <NUM> to activate. In some embodiments, the controller <NUM> may be configured to provide the activation request to the one or more lighting assemblies <NUM>.

At block <NUM>, the lighting assembly controller <NUM> may receive the activation request. As described above, the activation request may identify base light sources <NUM>, first supplementary lights <NUM>, and second supplementary lights <NUM> of the lighting tower <NUM> to activate, along with the corresponding power to be supplied to each, to achieve the desired CCT. A signal indicative of the activation request may be received via the wired connection <NUM>, via the wireless connection <NUM>, or via both.

At block <NUM>, the lighting assembly controller <NUM> may activate the one or more lighting assemblies <NUM> based upon the activation request. As described above, the activation request may identify specific lights of the lighting tower <NUM> to activate and the corresponding power to be supplied to each light. The lighting assembly controller <NUM> may output signals to the lighting tower <NUM> to activate the specific lights and provide the specific amounts of power. With this activation of the lights of the lighting tower <NUM>, the desired CCT is generated. Whilst the above control of CCT has been described with specific reference to the lighting elements shown in <FIG>, it is to be appreciated that the lighting elements of other embodiments could also be controlled in this manner to generate the required CCT.

<FIG> is a graphical illustration <NUM> of light spectrums that may be generated by the lighting system <NUM> of <FIG>. In the graphical illustration <NUM>, the x-axis <NUM> depicts a wavelength (or frequency) of light that may be generated by each of the base light sources <NUM> ("M-primary COBs"), first supplementary light sources <NUM> ("L - CCT > LEDs"), and second supplementary light sources <NUM> ("N - CCT > LEDs"). The y-axis depicts a relative intensity value that may be generated by each light source. As illustrated, the base light sources <NUM> may generate light having a wavelength ranging from <NUM> to <NUM> and a relative intensity slightly less than <NUM>. The supplementary light sources (i.e., the first supplementary light sources <NUM> and the second supplementary light sources <NUM>) may provide additive light. For example, first supplementary light sources <NUM> may provide additive light ranging in wavelength from about <NUM> to <NUM> and a relative intensity up to about <NUM>. Second supplementary lights <NUM> may provide additive light ranging in wavelength from about <NUM> to <NUM>.

Certain combinations of light from each of the base light sources <NUM>, the first supplementary light sources <NUM>, and the second supplementary light sources <NUM> may generated light at desired CCTs. For example, as illustrated a combined light including light "M" from the base light sources <NUM> and light "L" the first supplementary light sources <NUM> may generate a CCT of <NUM>. By contrast, light "M" combined with light "N" from the second supplementary light sources <NUM> may generated a CCT of <NUM>. As such, light emitted from each of the base light sources <NUM>, the first supplementary light sources <NUM>, and the second supplementary light sources <NUM> may be blended to generate a desired CCT. For example, adjustments may include determining a subset of the supplementary light sources <NUM> and <NUM> that provide an offset color that would shift the base light <NUM> to the desired CCT. In some embodiments, a first subset of supplementary lights may be configured to adjust the CCT to a first value (e.g., <NUM>), and a second subset of supplementary lights may be configured to adjust the CCT to a second value (e.g., <NUM>).

<FIG> is a diagram <NUM> of colors and CCTs that may be generated by the lighting system <NUM> of <FIG>. The diagram <NUM> shows the color space that may be achieved with the lighting system <NUM>. In addition to CCT adjustment, a certain amount of green adjustment may be made to the white light to move it off of a black body curve <NUM> for effects and color tuning. For example, the green adjustment may be positive or negative relative to a base white light. The diagram <NUM> includes an x-axis having a range of CCTs from <NUM> to <NUM>+K. As generally described herein, the lighting system <NUM> may be configured to generate light ranging from <NUM> to <NUM>.

While the various embodiments described above include certain embodiments configured to adjust a beam angle of a lighting assembly <NUM>, and other embodiments configured to adjust a CCT of a lighting assembly <NUM>, an exemplary embodiment of the lighting system <NUM> includes the ability to adjust both a beam angle and a CCT of a lighting assembly <NUM>. In such embodiments, beam angle and CCT adjustments may be implemented via non-mechanical means, resulting in significant benefits such as reduced maintenance and increased operability.

<FIG> is a rear perspective view of the lighting assembly <NUM> of <FIG>. Cooling of the lighting assembly <NUM> may be enhanced via active cooling. For example, heat generated by operation of the lighting tower <NUM> (e.g., operation of the LED's <NUM>) may be dissipated to ambient air flowing through the lighting assembly <NUM>. As illustrated, the vents <NUM> may enable air flow into the lighting assembly <NUM>, as indicated by arrows <NUM>. The air flow into the lighting assembly <NUM> may be caused by low pressure within the lighting assembly <NUM> and/or by fans <NUM> within the lighting assembly <NUM>. The fans <NUM> are positioned generally above the vents <NUM> and are angled relative to the vents <NUM> to substantially prevent water and other debris from entering the lighting assembly <NUM>.

After entering the lighting assembly <NUM>, the air flow may contact and absorb heat from the chassis <NUM>, the PAR <NUM>, the lighting tower <NUM>, and/or other components of the lighting assembly <NUM>. Additionally or alternatively, the air may flow generally downwardly and may exit the lighting assembly <NUM>, as indicated by arrow <NUM>. In certain embodiments, as described in greater detail below, the lighting assembly <NUM> may include a coolant system configured to flow a coolant through the lighting tower <NUM> and a condenser <NUM>. The air flow exiting the lighting assembly <NUM> (e.g., arrow <NUM>) may pass through and/or over the condenser <NUM> to exchange heat with the coolant flowing from the lighting tower <NUM> and through the condenser <NUM>.

<FIG> is a rear perspective view of the lighting assembly <NUM> of <FIG>. As illustrated, the lighting assembly <NUM> includes a coolant system <NUM> configured to actively cool the lighting tower <NUM>. The coolant system <NUM> includes the condenser <NUM>, coolant pipes <NUM>, and piping within the lighting tower <NUM>. As illustrated, the coolant pipes <NUM> are coupled to the condenser <NUM> and a base <NUM> of the lighting tower <NUM>. The coolant pipes <NUM> are configured to carry coolant between the condenser <NUM> and the lighting tower <NUM>. For example, the coolant pipes <NUM> may carry chilled coolant from the condenser <NUM> to the lighting tower <NUM>. The chilled coolant may pass through the lighting tower <NUM> and absorb heat generated by LED's <NUM> of the CSP arrays <NUM>. Heated coolant may exit the lighting tower <NUM>, and the coolant pipes <NUM> may carry the heated coolant back to the condenser <NUM>. The condenser <NUM> may condense and/or cool the heated coolant via the airflow <NUM>. The chilled coolant may return to the lighting tower <NUM> to continue cooling the lighting tower <NUM>. In certain embodiments, the lighting tower <NUM> may include a pump <NUM> within the lighting tower <NUM> or exterior to the lighting tower <NUM> that is configured to force the coolant to flow through the lighting tower <NUM>, the cooling pipes <NUM>, and the condenser <NUM>.

<FIG> is a perspective view of an embodiment of the lighting tower <NUM> of the lighting system <NUM> of <FIG>. For example, the embodiment of <FIG> may be employed within the lighting assembly <NUM>. As illustrated, the lighting tower <NUM> and the cooling system <NUM> include heat pipes <NUM> extending into the lighting tower <NUM> and coupled to one another. As described in greater detail in reference to <FIG>, the heat pipes <NUM> may extend along the length <NUM> of the lighting tower <NUM>. The heat pipes <NUM> are connected via connections <NUM> (e.g., "U-joints") configured to pass coolant from one heat pipe <NUM> to another heat pipe <NUM>.

The cooling system <NUM> may flow coolant to and from the lighting tower <NUM> via a first heat pipe 1100A and a second heat pipe 1100B, respectively. For example, the coolant pipes <NUM> may be coupled to and configured to flow coolant to and from the first heat pipe 1100A and the second heat pipe 1100B. The coolant may enter the lighting tower <NUM> at the first heat pipe 1100A as a chilled coolant, flow through the heat pipes <NUM> and the connections <NUM>, and exit the lighting tower <NUM> at the second heat pipe 1100B as a heated coolant. After exiting the lighting tower <NUM>, the heat coolant may be chilled by the condenser <NUM> to provide further cooling thereafter. To facilitate heat transfer, the heat pipes <NUM> may be made of copper and/or of other suitable conductive materials.

As illustrated, the lighting tower <NUM> also includes a core <NUM> that is generally hollow to enable wiring to pass along the length <NUM> of the lighting tower <NUM> within the lighting tower <NUM>. For example, the wiring connected to the individual CSP arrays <NUM> may extend into the lighting tower <NUM> and the core <NUM> and may extend to a power source and/or controller. In embodiments with fifty-four CSP arrays <NUM> (e.g., nine CSP arrays <NUM> on each side <NUM>), the core <NUM> may provide area for wiring to all fifty-four CSP arrays <NUM> (e.g., about one hundred sixty-two wires).

<FIG> is a perspective view of another embodiment of the lighting tower <NUM> of the lighting system <NUM> of <FIG>. For example, the embodiment of <FIG> may be employed within the lighting assembly <NUM>. As illustrated, the heat pipes <NUM> extend along the length <NUM> of the lighting tower <NUM> and are coupled to one another such that the coolant may pass from one heat pipe <NUM> to another. Each side <NUM> of the lighting tower <NUM> includes two heat pipes <NUM> extending between a first end <NUM> and a second end <NUM> of the lighting tower <NUM>. For each side <NUM>, the coolant may flow from the first end <NUM> to the second end <NUM> along a first heat pipe <NUM> and flow from the second end <NUM> to the first end <NUM> along a second heat pipe <NUM>. As such, the heat pipes <NUM> may provide effective cooling of the lighting tower <NUM> via the coolant flow.

<FIG> is a cross-sectional view of a further embodiment of the lighting tower <NUM> of the lighting system <NUM> of <FIG>. For example, the embodiment of <FIG> may be employed within the lighting assembly <NUM>. As illustrated, the cooling system <NUM> includes heat pipes <NUM> and <NUM> configured to flow coolant through the lighting tower <NUM> to absorb heat generated by the LED's <NUM> of the CSP arrays <NUM>. The heat pipe <NUM> may be an inlet pipe configured to receive chilled coolant and pass the chilled coolant along the length <NUM> of the lighting tower <NUM>. The coolant may flow into the heat pipe <NUM> that extends between the heat pipe <NUM> and a casing <NUM> of the lighting tower <NUM> that is coupled to the CSP arrays <NUM>. The coolant may flow down the heat pipe <NUM> and toward an outlet <NUM>. The coolant may then exit the lighting tower <NUM> via the pipe <NUM> as a heated coolant, which may be chilled via the condenser <NUM> and returned to the lighting tower <NUM>. In certain embodiments, the fluid flow may be reversed such that the pipe <NUM> as a chilled coolant, flows through the heat pipe <NUM> and absorbs heat, and exits the lighting tower <NUM> via the heat pipe <NUM>.

Claim 1:
A lighting assembly (<NUM>;<NUM>) comprising:
a lighting tower (<NUM>;<NUM>) configured to receive an input from a user indicative of a desired beam angle and an input from a user indicative of a desired color coordinated temperature (CCT), wherein the lighting tower (<NUM>, <NUM>) comprises:
a plurality of layers (<NUM>) of lighting elements (<NUM>), wherein each layer (<NUM>) of lighting elements (<NUM>) is configured to provide a different angle of emitted light with respect to light emitted from another layer (<NUM>) of lighting elements (<NUM>) when activated within a parabolic reflector (<NUM>;<NUM>); and
a controller configured to:
identify one or more layers (<NUM>) of the plurality of lighting elements (<NUM>) that generate the desired beam angle, when reflected by a parabolic reflector (<NUM>, <NUM>);
provide a first activation request to the one or more layers (<NUM>) of lighting elements (<NUM>) in the lighting tower (<NUM>, <NUM>), wherein the first activation request causes activation of the one or more layers (<NUM>) of lighting elements (<NUM>) in the lighting tower (<NUM>, <NUM>), and wherein the activation of the one or more layers (<NUM>) of lighting elements (<NUM>) in the lighting tower (<NUM>, <NUM>) generates the desired beam angle;
identify one or more adjustments to lighting elements (<NUM>) of the one or more layers (<NUM>) of the lighting tower (<NUM>, <NUM>) that would generate the desired CCT; and
provide a second activation request to the lighting elements (<NUM>) of the one or more layers (<NUM>) of the lighting tower, wherein the second activation request causes the one or more adjustments to the lighting elements (<NUM>) of the one or more layers (<NUM>) of the lighting tower (<NUM>, <NUM>), and wherein the one or more adjustments causes the lighting elements (<NUM>) of the one or more layers (<NUM>) of the lighting tower (<NUM>, <NUM>) to activate, such that the desired CCT is generated.