Lens assembly for lighting device

Abstract

A lighting device may include a first lens, a housing defining a cavity, an emitter, a reflector, and an internal optical structure. The transmitter may be mounted within the housing. The emitter may be configured to generate light. The reflector may be located within the cavity. The reflector may be configured to reflect the light generated by the emitter toward the first lens. The internal optical structure may be located between the emitter and the first lens. The internal optical structure may include a second lens and a light shield between the second lens and the emitter. The light shield may include a first surface configured to reflect the light emitted by the emitter. The light shield may include one or more apertures through the light shield, the one or more apertures configured to allow the light emitted by the emitter to pass therethrough.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Provisional U.S. Patent Application No. 63 / 409,821, filed on September 25, 2022, the entire disclosure of which is hereby incorporated by reference herein in its entirety. Background Art

[0003] Lamps and displays that use efficient light sources, such as light emitting diode (LED) light sources, for illumination are becoming increasingly popular in many different markets. LED light sources offer many advantages over traditional light sources, such as incandescent and fluorescent lamps. For example, LED light sources may have lower power consumption and longer life than traditional light sources. When used for general illumination, LED light sources provide the opportunity to adjust the color (e.g., from white to blue, green, etc.) or color temperature (e.g., from warm white to cool white) of the light emitted from the LED light source to produce different lighting effects.

[0004] A multicolor LED lighting device may have two or more different colored LED emitting devices (e.g., LED emitters) that are combined in the same package to produce light (e.g., white or near-white light). There are many different types of white light LED light sources on the market, some of which combine red, green, and blue (RGB) LED emitters; red, green, blue, and yellow (RGBY) LED emitters; phosphor-converted white and red (WR) LED emitters; red, green, blue, and white (RGBW) LED emitters, etc. By combining LED emitters of different colors in the same package and driving the emitters of different colors with different drive currents, these multicolor LED lighting devices can generate white or near-white light within a wide range of color points or correlated color temperatures (CCTs), ranging from warm white (e.g., about 2600K-3700K) to neutral white (e.g., about 3700K-5000K) to cool white (e.g., about 5000K-8300K). Some multicolor LED lighting devices can also enable the brightness (e.g., intensity or dimming level) and / or color of the lighting to be changed to a specific set point. Summary of the invention

[0005] As described herein, an exemplary lighting device may include a first lens, a housing defining a cavity, an emitter, a reflector, and an internal optical structure. The emitter may be mounted within the housing. The emitter may be configured to generate light. The reflector may be located within the cavity. The reflector may be configured to reflect the light generated by the emitter toward the first lens. The internal optical structure may be located between the emitter and the first lens. The internal optical structure may include a second lens and a light shield located between the second lens and the emitter. The light shield may include a first surface configured to reflect the light emitted by the emitter. The light shield may include one or more apertures through the light shield, the one or more apertures being configured to allow the light emitted by the emitter to pass through. The first surface is configured to redirect a first portion of the light emitted by the emitter toward a base of the reflector, and the one or more apertures are configured to allow a second portion of the light emitted by the emitter to pass through the one or more apertures to the second lens. The redirected first portion of the light may be reflected by the base of the reflector toward and through the second lens. The second lens may be configured to diffuse the redirected first portion of the light before the light passes through the first lens.

[0006] The first lens may be configured to diffuse the light generated by the emitter. The second lens may be configured to diffuse the second portion of the light before the light passes through the first lens. The one or more apertures may include one or more slots extending along a longitudinal axis defined by the length of the housing. The one or more apertures may include one or more slots extending substantially perpendicular to the longitudinal axis defined by the length of the housing. The lighting device may include a plurality of emitters and a plurality of light shields. Each of the plurality of light shields may be positioned proximate to a corresponding emitter of the plurality of emitters. The one or more light shields may be evenly spaced along the length of the linear lighting device. The light shield may be configured to be fastened to the second lens. The light shield includes a pair of clips configured to be received by corresponding holes in the second lens to fasten the light shield to the second lens. Additionally or alternatively, the light shield may be fastened to the second lens using an adhesive. The internal optical structure may include the reflector and the emitter.

[0007] The second lens may include a plurality of tabs configured to be received in apertures in the reflector to secure the internal optical structure within the housing. The emitter may be an emitter assembly including one or more emitters. The lighting device may include a printed circuit board received in the first cavity of the housing. The emitter may be mounted to the printed circuit board. Additionally or alternatively, the emitter may be mounted to a substrate mounted to the printed circuit board. The lighting device may include a plurality of printed circuit boards, a plurality of reflectors, and a plurality of internal optical structures. Each reflector and each internal optical structure may be aligned with a corresponding printed circuit board in the plurality of printed circuit boards. The printed circuit board may be mounted with a control circuit. The control circuit may be configured to control the emitter based on receiving one or more messages. The first lens may include a pair of side walls configured to attach the first lens to the housing. The reflector may include a base and a side wall extending from the base substantially perpendicular to a longitudinal axis of the lighting device. The emitter may include an emitter module including a plurality of light emitting diodes (LEDs) and a plurality of detectors mounted to a substrate and enclosed by a dome-shaped body.

[0008] Another exemplary lighting device may include a plurality of controllable light emitting diode (LED) light sources. The lighting device may include a housing. The housing may define a first cavity. The first cavity may extend along a longitudinal axis of the housing. The lighting device may include a cover lens. The lighting device may include a printed circuit board received in the first cavity of the housing. The lighting device may include a plurality of emitters mounted to the printed circuit board. Each of the plurality of emitters may be configured to generate light. The cover lens may be configured to diffuse the light generated by the plurality of emitters. The linear lighting device may include one or more reflectors received in the first cavity between the printed circuit board and the cover lens. The one or more reflectors may be configured to reflect the light generated by the plurality of emitters toward the cover lens. The one or more reflectors may define a second cavity.

[0009] The linear lighting device may include one or more internal optical structures received within the second cavity between the plurality of emitters and the cover lens. Each of the one or more internal optical structures may include an internal lens and one or more light shields secured to the internal lens. Each of the one or more light shields may be configured to redirect a first portion of light emitted by a corresponding emitter of the plurality of emitters toward the plurality of printed circuit boards. Each of the one or more light shields may be configured to permit a second portion of light emitted by a corresponding emitter of the plurality of emitters to pass through. The first portion of light may include an outer beam of light emitted by a corresponding emitter of the plurality of emitters. The second portion of light may include at least a portion of a center beam of light emitted by a corresponding emitter of the plurality of emitters. The redirected first portion of light may be reflected by the base of the reflector toward and through the internal lens. The internal lens may be configured to diffuse the redirected first portion of light before the light passes through the cover lens.

[0010] The one or more internal optical structures may be secured to the reflector. Each of the one or more sunshades may include a pair of tabs configured to be received by corresponding apertures in the internal lens to secure the one or more sunshades to the internal lens. The internal lens may include a plurality of tabs configured to be received within apertures in the reflector to secure the internal lens assembly within the second cavity.

[0011] Each of the one or more light shields may include one or more apertures configured to permit the second portion of the light to pass through the corresponding light shield. The one or more apertures may include a slot extending along a longitudinal axis. Each of the one or more light shields may be positioned proximate to a corresponding emitter of the plurality of emitters. The one or more light shields may be evenly spaced along the length of the linear lighting device. The linear lighting device may include a plurality of reflectors and a plurality of internal optical structures. Each reflector and each internal lens assembly may be aligned with a corresponding emitter printed circuit board of the plurality of emitter printed circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a simplified perspective view of an exemplary lighting device.

[0013] Figure 2A yes Figure 1 Partial exploded view of the lighting device.

[0014] Figure 2B yes Figure 1A partial front cross-sectional view of a lighting device.

[0015] Figure 2C yes Figure 1 A side cross-sectional view of a lighting device.

[0016] Figure 2D It is shown Figure 1 A partial bottom cross-sectional view of an exemplary slot arrangement of a light shield of a lighting device.

[0017] Figure 2E It is shown Figure 1 A partial bottom cross-sectional view of another exemplary slot arrangement for a light shield of a lighting device.

[0018] Figure 2F It is shown Figure 1 A partial bottom cross-sectional view of another exemplary slot arrangement for a light shield of a lighting device.

[0019] Figure 2G is shown attached to the lens hood using the corresponding clips defined by the lens hood Figure 1 A partial perspective view of a hood of an internal lens of a lighting device.

[0020] Figure 2H is shown using adhesive to attach to Figure 1 A partial perspective view of a hood of an internal lens of a lighting device.

[0021] Figures 2I to 2M yes Figure 1 Various views of an exemplary light shield of a lighting fixture.

[0022] FIG. 3A to FIG. 3E yes Figure 1 An exemplary light emitting diode (LED) printed circuit board for a lighting device.

[0023] Figure 4A is a top view of an exemplary transmitter module.

[0024] Figure 4B yes Figure 5 A side cutaway view of the transmitter module.

[0025] Figure 5 It is shown Figure 1 A perspective view of an exemplary end-to-end and wired connection of a lighting device.

[0026] Figure 6 is used Figure 1 A simplified block diagram of a linear lighting assembly of a lighting device.

[0027] Figure 7 is a simplified block diagram of an exemplary lamp controller.

[0028] Figure 8 is a simplified block diagram of an exemplary main transmitter module.

[0029] Fig. 9 is a simplified block diagram of an exemplary intermediate transmitter module.

[0030] Fig.10 is a simplified block diagram of an exemplary end transmitter module. DETAILED DESCRIPTION

[0031] Figure 1 is a simplified perspective view of an exemplary lighting device 100 (e.g., a linear lighting fixture). The lighting device 100 may be referred to herein as a linear lighting device. The linear lighting device 100 may include a housing 110, a cover lens 120, and end caps 130A, 130B. The housing 110 may be elongated (e.g., in the x-direction). The housing 110 may be configured to be mounted to a structure (e.g., a horizontal structure) so that the linear lighting device is attached to the structure. For example, the linear lighting device 100 may be configured to be mounted under a cabinet, a shelf, a door, a step, and / or some other structure. The housing 110 may define an upper surface 112 and a lower surface 114. When the housing 110 is mounted to the structure, the upper surface 112 may be configured to be close to the structure and the lower surface 114 may be away from the structure.

[0032] The linear lighting device 100 can define a first end 106A (e.g., an input end) and an opposing second end 106B (e.g., an output end). The end cap 130A can be an input end cap located at the first end 106A, and the end cap 130B can be an output end cap located at the second end 106B. The linear lighting device 100 can define connectors 132A, 132B that can be accessed via the respective end caps 130A, 130B. The connectors 132A, 132B can be configured to connect the linear lighting device 100 to a lamp controller (e.g., a controller, a lighting controller, and / or a lamp controller, such as Figure 6 ) and / or other linear lighting devices. For example, connector 132A may be configured to connect linear lighting device 100 to a controller or another linear lighting device, and connector 132B may be configured to connect linear lighting device 100 to another linear lighting device.

[0033] Figure 2A is an exploded view of an exemplary linear lighting device 100 . Figure 2B is a partial front cross-sectional view of an exemplary linear lighting device 100 . Figure 2C is a side cross-sectional view of an exemplary linear lighting device 100 . FIG. 2D to FIG. 2F is a partial bottom cross-sectional view of an exemplary linear lighting device 100 . Figure 2G and Figure 2H1 is a partial perspective view of a side cross-section of an exemplary linear lighting device 100. The housing 110 can define a cavity 115 extending along a longitudinal axis 108 (e.g., in the x-direction) of the linear lighting device 100 (e.g., the housing 110). The longitudinal axis 108 can be defined by the length of the housing 110. The housing 110 can define an inner surface 112, e.g., defining a boundary of the cavity 115. The inner surface 112 can define a channel 114 extending along the length of the linear lighting device 100 (e.g., in the x-direction) on opposite sides of the cavity 115. The cover lens 120 can define a sidewall 122 configured to extend into the cavity 115 to secure the cover lens 120 to the housing 110. The sidewall 122 can define a ridge 124 configured to engage with (e.g., be received within) the channel 114 to secure the cover lens 120 to the housing 110.

[0034] The linear lighting device 100 may include one or more lighting modules (e.g., light generating modules) 150A, 150B, 150C that may be received within the cavity 115. The lighting modules 150A, 150B, 150C may each include a respective printed circuit board (PCB). The lighting modules 150A, 150B, 150C may each include one or more emitter modules 154 (e.g., emitter assemblies), which may each include one or more emitters, such as light emitting diodes (LEDs). Each emitter assembly (e.g., emitter module 154) may include a single LED or multiple LEDs (e.g., off-the-shelf LEDs) in a package. For example, in this example, each lighting module 150A, 150B, 150C includes four respective emitter modules 154. The emitter modules 154 may be mounted to respective PCBs 152A, 152B, 152C. Additionally or alternatively, the transmitter module 154 may be mounted to a substrate that is mounted to a respective PCB 152A, 152B, 152C.

[0035] Each of the transmitter modules 154 may include one or more transmitters (e.g., such as Figure 4A and Figure 4B The transmitter 310 shown in ; Figure 8 LEDs 811, 812, 813, 814 shown in; Fig. 9 LEDs 911, 912, 913, 914 shown in; and / or Fig.101011, 1012, 1013, 1014 shown in FIG. 1011 ). Each of the lighting modules 150A, 150B, 150C may include a transmitter processor configured to control a transmitter module 154 mounted to a corresponding PCB 152A, 152B, 152C of the corresponding lighting module 150A, 150B, 150C. When the lighting modules 150A, 150B, 150C include a plurality of transmitter modules 154, each of the plurality of transmitter modules 154 of the corresponding lighting module (e.g., lighting module 150A) may be controlled by one transmitter processor. Controlling the plurality of transmitter modules 154 by one transmitter processor may reduce the power consumption of the lighting module, reduce the size of the PCB, and / or reduce the number of messages sent.

[0036] The lighting modules 150A, 150B, 150C (e.g., PCBs 152A, 152B, 152C) may be secured within the cavity 115, for example, using thermal tape 170. The thermal tape 170 may be, for example, an adhesive that enables heat to be dissipated from the emitter modules 154 of the PCBs 152A, 152B, 152C to the housing 110 while also adhering the PCBs 152A, 152B, 152C to the housing 110. The thermal tape 170 may be divided into several sections (e.g., two or more) for each of the PCBs 152A, 152B, 152C. Alternatively, it should be understood that the thermal tape 170 may be continuous along the length of the linear lighting device 100 (e.g., in the x-direction).

[0037] The PCBs 152A, 152B, 152C of the lighting modules 150A, 150B, 150C may be connected together using a cable, such as a ribbon cable (not shown). The cable may mechanically, electrically, and / or communicatively connect adjacent ones of the PCBs 152A, 152B, 152C. For example, PCB 152A may be connected to PCB 152B via one of the cables, and PCB 152B may be connected to PCB 152C via another of the cables. For example, the ends of the cables may be inserted into jacks on the PCBs of adjacent lighting modules, such as zero insertion force (ZIF) connectors. The cables may be flat flexible cable jumpers, as shown. Alternatively, the cables may be round flexible jumpers, rigid jumpers, etc.

[0038] The lighting module 150A may be a master module (e.g., a starter module). For example, the master module may be the first module of the linear lighting device 100 that is positioned proximate to the first end 106A. For example, each linear lighting device 100 may be started by a master module (e.g., such as the lighting module 150A). The master module may receive a message (e.g., including control data and / or commands) and may be configured to control one or more other lighting modules, such as slave lighting modules, based on receiving the message. For example, each master module may include an additional processor (e.g., the master processor 158). The lighting modules 150B, 150C may be slave lighting modules. Each slave lighting module may be controlled by the master module. For example, the lighting modules 150B, 150C may be controlled by the lighting module 150A. The master processor of the lighting module 150A may control the transmitter processor to control the transmitter module 154 of each of the lighting modules 150A, 150B, 150C. The slave lighting modules may be intermediate slave lighting modules or end slave modules. An intermediate slave lighting module (e.g., such as lighting module 150B) may be connected between a master module and another slave lighting module. An intermediate slave lighting module may be connected between other slave lighting modules. An end slave lighting module (e.g., such as lighting module 150C) may be connected between a master module or another slave lighting module of its corresponding linear lighting device and another linear lighting device. An end slave lighting module may be connected between another slave lighting module and another master module (e.g., when the linear lighting device 100 includes multiple master modules). Although the linear lighting device 100 is shown to have three lighting modules (e.g., master module 150A, intermediate slave lighting module 150B, and end slave lighting module 150C), it should be understood that the linear lighting device may include multiple master modules. Each master module may control multiple (e.g., one or more) slave lighting modules (e.g., up to 5 slave lighting modules).

[0039] Each main module of the linear lighting device 100 (e.g., lighting module 150A) can include a connector 132A (e.g., an input connector) attached to the main module. For example, the connector 132A can be a female connector. The connector 132A can be configured to connect the linear lighting device 100 to a lamp controller (e.g., a controller and / or a lamp controller, such as Figure 6). The connector 132A may be configured to connect the linear lighting device 100 to another linear lighting device. The connector 132A may be configured to connect the main module (e.g., lighting module 150A) of the linear lighting device 100 to the slave lighting module (e.g., end slave lighting module) of another linear lighting device. Each end slave lighting module (e.g., lighting module 150C) of the linear lighting device 100 may include a connector 132B (e.g., output connector) attached to the end slave lighting module. For example, the connector 132B may be a male connector. The connector 132B may be configured to connect the linear lighting device 100 to another linear lighting device. The connector 132B may be configured to connect the end slave lighting module (e.g., lighting module 150C) of the linear lighting device 100 to the main module of another linear lighting device.

[0040] The linear lighting device 100 may include end caps 130A, 130B. The end caps 130A, 130B may define an aperture 134 configured to receive the connector 132A and / or the connector 132B. The end caps 130A, 130B may be fastened to the housing 110, for example, using fasteners 136A, 136B. The light gaskets 190A, 190B may be configured to prevent light emitted by the emitter PCBs 150A, 150B, 150C from escaping between the end caps 130A, 130B and the housing 110. The light gasket 190A may be configured to be located between the end caps 130A and the housing 110. The light gasket 190A may be configured to be located between the end caps 130B and the housing 110.

[0041] The linear lighting device 100 may include one or more reflectors 165A, 165B, 165C. The reflectors 165A, 165B, 165C may be configured to reflect (e.g., direct) light generated by the emitter module 154, for example, toward the cover lens 120. For example, each of the reflectors 165A, 165B, 165C may define a reflective upper surface 175. The reflectors 165A, 165B, 165C may be configured such that light emitted by the emitter module 154 is ultimately redirected to pass through the cover lens 120. Each of the reflectors 165A, 165B, 165C may be aligned with a corresponding one of the PCBs 152A, 152B, 152C. For example, reflector 165A may be mounted above and aligned with PCB 152A, reflector 165B may be mounted above and aligned with PCB 152B, and reflector 165C may be mounted above and aligned with PCB 152C. For example, the ends of reflectors 165A, 165B, 165C may be aligned with the ends of PCB 152A, 152B, 152C. Each of reflectors 165A, 165B, 165C may define a base 168 (e.g., a bottom plate) and a sidewall 163 extending from base 168. For example, base 168 and sidewall 163 may be arranged such that reflectors 165A, 165B, 165C define a U-shaped cross-section. Sidewall 163 may be configured to extend beyond the midpoint of housing 110 (e.g., in the z-direction). Each of the reflectors 165A, 165B, 165C may define a cavity 167 defined by a base 168 and sidewalls 163 .

[0042] Each of the reflectors 165A, 165B, 165C (e.g., base 168) may define a plurality of openings 166 configured to align with corresponding ones of the emitter modules 154 such that light generated by the emitter modules 154 passes through the openings 166. The emitter modules 154 may be configured to extend (e.g., partially extend) through the openings 166 into a cavity 167 defined by the reflectors 165A, 165B, 165C. Each of the reflectors 165A, 165B, 165C may define a slot 171 on an opposite end that is configured to receive a mounting post 173 on each of the PCBs 152A, 152B, 152C. Although the figures only show the slot 171 at one end of the reflector 165A, it should be understood that each of the reflectors 165A, 165B, 165C defines the slot 171 on both ends. For example, the reflectors 165A, 165B, 165C may be symmetrical in the x-direction. The mounting posts 173 may be configured to be soldered to the reflectors 165A, 165B, 165C, for example to secure the reflectors 165A, 165B, 165C to the PCBs 152A, 152B, 152C and to electrically connect the reflectors 165A, 165B, 165C to ground (e.g., which may help prevent electrostatic discharge from reaching and damaging electrical components on the respective PCBs 152A, 152B, 152C). Although the figures show the mounting posts 173 at one end of the PCBs 152A, 152C, it should be understood that the PCBs 152A, 152C may have mounting posts 173 at both ends.

[0043] When installed in the housing 110, adjacent ones of the reflectors 165A, 165B, 165C (e.g., the bases 168 and sidewalls 163 of adjacent ones of the reflectors 165A, 165B, 165C) may meet at the seam 161 (e.g., as shown in FIG. Figure 2A). An adjacent pair of reflectors 165A, 165B, 165C may be misaligned when installed in the linear lighting device 100. An adjacent pair of misaligned reflectors 165A, 165B, 165C may cause a gap to be formed at a corresponding seam 161 between an adjacent pair of reflectors 165A, 165B, 165C (e.g., between a base 168 and a side wall 163 of a corresponding reflector 165A, 165B, 165C). For example, if one of the reflectors 165A, 165B, 165C is not adjacent to an adjacent reflector, the corresponding seam 161 may form a gap between the base 168 and the side wall 163 of the adjacent reflector, which may allow light from the emitter module 154 to be irradiated onto the cover lens 120 between the side walls 163 of adjacent reflectors (e.g., adjacent to the side wall 122 of the cover lens 120). The cover lens 120 (eg, the sidewall 122) can define a flange 126 that extends over (eg, overhangs) the sidewalls 163 of the reflectors 165A, 165B, 165C (eg, as shown in FIG. Figure 2C ) to block light entering the gap at one of the seams 161 from contacting the cover lens 122 and forming an undesirable hot spot.

[0044] The linear lighting device 100 may include one or more insulators 160A, 160B, 160C. The insulators 160A, 160B, 160C may be configured to electrically insulate the reflectors 165A, 165B, 165C from the PCBs 152A, 152B, 152C. For example, the insulators 160A, 160B, 160C may be used as electromagnetic interference (EMI) shields. One of the insulators 160A, 160B, 160C may be aligned with a corresponding one of the PCBs 152A, 152B, 152C. For example, the insulator 160A may be located below and aligned with the PCB 152A, the insulator 160B may be mounted above and aligned with the PCB 152B, and the insulator 160C may be mounted above and aligned with the PCB 152C. For example, the ends of the insulators 160A, 160B, 160C may be aligned with the ends of the PCBs 152A, 152B, 152C. Each of the insulators 160A, 160B, 160C may define a plurality of openings 162. Each of the openings 162 may be configured to align with a corresponding one of the emitter modules 154 so that light generated by the emitter modules 154 passes through the openings 162. Additionally or alternatively, one or more adhesive pads 164 may be used to secure the insulators 160A, 160B, 160C to the respective PCBs 152A, 152B, 152C.

[0045] The emitter modules 154 may emit light toward the cover lens 120. Most of the light (e.g., a center beam) emitted by the emitter modules 154 may radiate toward (e.g., directly toward) the cover lens 120 and form a plurality of hot spots (e.g., high intensity regions) on the cover lens 120. The light emitted by the emitter modules 154 may form a plurality of medium intensity regions and / or a plurality of corresponding low intensity regions between adjacent hot spots on the cover lens 120. The outer beams of light emitted by the emitter modules 154 may radiate further away from the respective emitter modules 154 toward the cover lens 120. The plurality of hot spots may be considered as separate individual light sources within the linear lighting device 100. It may be desirable to achieve uniform light intensity throughout the length of the linear lighting device 100, for example, so that light may be considered as radiating from one source along the length of the linear lighting device 100.

[0046] The linear lighting device 100 may include one or more internal optical structures 140A, 140B, 140C (e.g., lens assemblies). The internal optical structures 140A, 140B, 140C may be configured to prevent hot spots from appearing on the cover lens 120 and / or minimize the intensity of hot spots on the cover lens (e.g., so that the hot spots are not noticeable to the human eye), for example, to achieve uniform light intensity on the cover lens 120. Each of the internal optical structures 140A, 140B, 140C may be aligned with a corresponding lighting module of the lighting modules 150A, 150B, 150C. The internal optical structures 140A, 140B, 140C may be configured to redirect and / or diffuse light emitted by the emitter modules 154 of the lighting modules 150A, 150B, 150C. For example, internal lens assembly 140A may be aligned with lighting module 150A, internal lens assembly 140B may be aligned with lighting module 150B, and internal lens assembly 140C may be aligned with lighting module 150C. The internal optical structures 140A, 140B, 140C may be adjacent to each other. The combination of internal optical structures 140A, 140B, 140C may extend across the entire length (e.g., in the x-direction) of linear lighting device 100. For example, the length of internal optical structures 140A, 140B, 140C when arranged side by side may be equal to the length of linear lighting device 100. Each of the internal optical structures 140A, 140B, 140C may extend to the length of its corresponding lighting module 150A, 150B, 150C. For example, a 3-inch internal lens assembly may be used with a 3-inch lighting module and a 4-inch internal lens assembly may be used with a 4-inch lighting module.

[0047] Each of the internal optical structures 140A, 140B, 140C may include an internal lens (e.g., one of the internal lenses 142A, 142B, 142C) and one or more light shields 144. The internal optical structures 140A, 140B, 140C may be received in a cavity 167 defined by reflectors 165A, 165B, 165C. Each of the internal optical structures 140A, 140B, 140C may include a reflector (e.g., one of the reflectors 165A, 165B, 165C) and one or more emitters (e.g., one of the emitter modules 154). The internal lenses 142A, 142B, 142C may be configured to diffuse the light emitted by the emitter module 154, for example, before the light passes through the cover lens 120. The one or more light shields 144 may be configured to be located between a corresponding inner lens of the inner lenses 142A, 142B, 142C and a corresponding emitter module of the emitter module 154. Each of the light shields 144 may be configured to be mounted to a bottom surface 137 of a corresponding inner lens of the inner lenses 142A, 142B, 142C. Each of the inner lenses 142A, 142B, 142C may include a plurality of apertures 141 configured to receive a portion of the one or more light shields 144. For example, the apertures 141 may be configured to secure the light shield 144 to the inner lenses 142A, 142B, 142C. Each of the light shields 144 may define one or more clips 145 that are configured to be received by the apertures 141, for example Figure 2G For example, each clip 145 may extend through one of the apertures 141 and may abut against the upper surface 139 of a corresponding inner lens in the inner lenses 142A, 142B, 142C. The clips 145 abutting against the upper surface 139 may secure the shade 144 to the corresponding inner lens in the inner lenses 142A, 142B, 142C.

[0048] Each of the inner lenses 142A, 142B, 142C can define a plurality of tabs 143. The plurality of tabs 143 can extend from the inner lenses 142A, 142B, 142C in the y-direction. The tabs 143 can be configured to secure the inner lenses 142A, 142B, 142C within the linear lighting device 100.

[0049] The number of light shields 144 of each of the internal optical structures 140A, 140B, 140C may correspond to the number of emitter modules 154 of the corresponding ones of the lighting modules 150A, 150B, 150C. Each of the internal optical structures 140A, 140B, 140C may include one of the light shields 144 for each emitter module 154 of its associated lighting module. Each of the light shields 144 may be configured to be positioned proximate to a corresponding one of the emitter modules 154 of the lighting modules 150A, 150B, 150C. That is, the light shield 144 of the internal lens assembly 140A can be positioned proximate to (e.g., directly below) the emitter module 154 of the lighting module 150A, the light shield 144 of the internal lens assembly 140B can be positioned proximate to (e.g., directly below) the emitter module 154 of the lighting module 150B, and the light shield 144 of the internal lens assembly 140C can be positioned proximate to (e.g., directly below) the emitter module 154 of the lighting module 150C. For example, the light shield 144 can be positioned in a path defined by the central beam of each of the emitter modules 154. It should be understood that although FIG. 2A to FIG. 2E The light shields 144 are shown positioned above the corresponding emitter modules 154, but the linear lighting device 100 is shown inverted (eg, with the cover lens 120 at the top) for viewing and description purposes.

[0050] The internal optical structures 140A, 140B, 140C can be configured to achieve a substantially uniform brightness and / or color distribution at the cover lens 120 along the length of the linear lighting device 100. For example, the internal optical structures 140A, 140B, 140C can be configured to suppress a central beam of light emitted by the plurality of emitter modules 154 and form a virtual source between each of the plurality of emitter modules 154. For example, the light shield 144 can prevent hot spots from appearing on the cover lens 120 by redirecting one or more portions of the light emitted by the respective emitter modules 154. As the light is redirected away from the light shield 144, the light is redirected again by the reflectors 165A, 165B, 165C (e.g., the base 168 of the reflectors 165A, 165B, 165C) toward the cover lens 120 at a location between adjacent emitter modules 154. For example, the redirected light can be considered a virtual light source between adjacent emitter modules 154.

[0051] The internal optical structures 140A, 140B, 140C (e.g., light shields 144) can prevent a portion of light (e.g., of a center beam) emitted from the emitter modules 154 from extending directly through the cover lens 120. Each of the light shields 144 can be configured to redirect at least a portion of the light emitted by the corresponding emitter module 154. Each of the light shields 144 can define a first surface 151 that is configured to redirect the portion of the light emitted by the corresponding emitter module 154. For example, each of the light shields 144 (e.g., first surface 151) can redirect a first portion 155B (e.g., an outer beam) of light emitted by the corresponding emitter module 154 in the z-direction (e.g., in a direction having a z-component) toward a corresponding one of the reflectors 165A, 165B, 165C (e.g., a base 168 of the reflectors 165A, 165B, 165C). The reflectors 165A, 165B, 165C may redirect the redirected first portion 155B of light toward the internal lenses 142A, 142B, 142C. The redirected first portion 155B of light may pass through the internal lenses 142A, 142B, 142C. The internal lenses 142A, 142B, 142C may diffuse the redirected first portion 155B of light. The redirected first portion 155B of light that has been diffused by the internal lenses 142A, 142B, 142C may then pass through the cover lens 120 in an area between adjacent emitter modules in the plurality of emitter modules 154. The cover lens 120 may further diffuse the redirected first portion 155B of light.

[0052] Each of the light shields 144 can permit a second portion 155A of light emitted by the corresponding emitter module 154 (e.g., at least a portion of the center beam) to pass through the light shield 144 toward the cover lens 120. The second portion 155A of light can be configured such that the unreflected beam of light passes through the cover lens 120 along the length of the linear lighting device 100 (e.g., in the x-direction). The redirected first portion 155B of light and the second portion 155A of light can be substantially uniformly distributed on the cover lens 120, for example, to provide a substantially uniform light emission through the cover lens 120. For example, the substantially uniform light emission provided through the cover lens 120 can be formed by a combination of: directing a beam of light (e.g., the second portion 155A of light) from the emitter module 154; redirecting a first portion of the light 155B toward the base 168 of the reflectors 165A, 165B, 165C; and reflecting the redirected first portion of the light 155B toward the cover lens 120. The light shields 144 may be evenly spaced along the length of the linear lighting device 100 (eg, in the x-direction).

[0053] It should be understood that Figure 2BThe dashed lines showing the first portion 155B and the second portion 155A in FIG. 1 are simplified examples of light (e.g., light rays) emitted by the emitter module 154. And one of ordinary skill in the art will understand that more dashed lines will be needed to show the total amount of light emitted by the emitter module 154. It should be understood that although in FIG. Figure 2B The middle dashed lines show that the first portion 155B and the second portion 155A extend from both of the emitter modules 154, but light is emitted from the other emitter modules 154 and is similarly directed / redirected.

[0054] The linear lighting device 100 may include an optical system 125. The optical system 125 may include a cover lens 120, one or more of the inner lenses 142A, 142B, 142C, one or more light shields 144, and one or more of the reflectors 165A, 165B, 165C. The optical system 125 may be configured to redirect and diffuse the light emitted by the emitter module 154 so that evenly distributed light is radiated from the cover lens 120.

[0055] The reflectors 165A, 165B, 165C may be configured to hold the internal optical structures 140A, 140B, 140C. For example, each of the reflectors 165A, 165B, 165C may define a plurality of apertures 169 in the sidewall 163. The apertures 169 may be configured to receive corresponding features (e.g., tabs 143) of the internal optical structures 140A, 140B, 140C. The apertures 169 may receive the tabs 143 of the internal lenses 142A, 142B, 142C to secure the corresponding internal optical structures 140A, 140B, 140C within the cavity 167.

[0056] The linear lighting device 100 may also include mounting brackets 180A, 180B. The mounting brackets 180A, 180B may be configured to attach the linear lighting device 100 to a structure. For example, the mounting brackets 180A, 180B may engage the upper surface 112 of the housing 110. The mounting brackets 180A, 180B may define respective holes 182A, 182B configured to receive respective fasteners 184A, 184B configured to attach the mounting brackets 180A, 180B to the structure.

[0057] Although the figures show the linear lighting device 100 with reflectors 165A, 165B, 165C, it should be understood that the reflectors 165A, 165B, 165C may be omitted. When the linear lighting device 100 omits the reflectors 165A, 165B, 165C, one or more surfaces (e.g., inner surfaces) of the linear lighting device (e.g., housing 110, PCB 152A, 152B, 152C, etc.) may be configured (e.g., painted white) to reflect light emitted by the emitter module 154. When the linear lighting device 100 omits the reflectors 165A, 165B, 165C, the internal optical structures 140A, 140B, 140C may be mounted to the housing 110.

[0058] Figures 2I to 2M 1 are perspective and projection views of an exemplary light shield 144 of the linear lighting device 100. The light shield 144 may include a middle portion 146 and end portions 148 located on opposite sides of the middle portion 146. The end portions 148 may define a first width D1. The middle portion 146 may define a second width D2. The second width D2 may be greater than the first width D1. For example, the middle portion 146 may be wider than the end portions 148. The end portions 148 may redirect a first portion 155B of light emitted by a corresponding one of the emitter modules 154 toward a corresponding one of the reflectors 165A, 165B, 165C (e.g., a base 168 of the reflectors 165A, 165B, 165C) in the z-direction (e.g., in a direction having a z-component). The redirected first portion 155B of light may be reflected back toward the cover lens 120 (e.g., in the z-direction), as described herein. The light shield 144 can define a length D3 that is greater than the first width D1 and the second width D2. The length D3 can be configured to redirect more light along the longitudinal axis of the linear lighting device 100.

[0059] The light shield 144 may define one or more apertures 147 such that a portion of the light emitted by the emitter module 154 passes through the light shield 144. The one or more apertures 147 may include a plurality of slots located on the middle portion 146, such as Figures 2I to 2M. The apertures 147 of the light shield 144 can be aligned with corresponding ones of the emitter modules 154. For example, the center of the middle portion 146 can be aligned with the center of corresponding ones of the emitter modules 154. The middle portion 146 can be wider than the end portions 148 so that the apertures 147 can be appropriately spaced. The apertures 147 can permit a second portion 155A of light emitted by a corresponding emitter module 154 to pass through the light shield 144 toward the cover lens 120. The second portion 155A of light can pass through a corresponding one of the inner lenses 142A, 142B, 142C, which diffuses the second portion 155A of light before the light reaches the cover lens 120. The second portion of light 155A can be configured so that a uniform light beam passes through the cover lens 120 along the length of the linear lighting device 100 (e.g., in the x-direction). Figure 2D A light shield 144 is shown having apertures 147 arranged along the x-direction. Figure 2E A light shield 144 is shown having apertures 147 arranged along the y-direction. Figure 2E Light shield 144 is shown with apertures 147 arranged along the xy direction. It should be understood that apertures 147 may be arranged in one or more other orientations relative to the x-direction and the y-direction.

[0060] It should be understood that the apertures 147 are not limited to the geometric shapes shown in the figures. Rather, the apertures 147 may have another shape (e.g., such as circular, oval, upright, circular slots, vertical slots, etc.) and may be arranged alternatively (e.g., such as arranged in a grid or patterned array) and still be configured to permit a portion of the light emitted by the emitter module 154 to pass through the light shield 144. It should be understood that one or more of the apertures 147 may be larger or smaller, for example to permit more or less light to pass through.

[0061] The clip 145 may extend from an upper surface 149 of the sunshade 144. The clip 145 may be located at an end portion 148 of the sunshade 144. Each of the clips 145 of the respective sunshade 144 may define an arm 145A and an edge 145B. The arm 145A may extend through a respective aperture of the apertures 141 of the inner lenses 142A, 142B, 142C. When the respective sunshade 144 is secured to a respective inner lens of the inner lenses 142A, 142B, 142C, the edge 145B may abut against an upper surface 139 of the respective inner lens 142A, 142B, 142C. Although Figure 2G The clip 145 is shown with a lip 145B, but it should be understood that the lip 145B can be omitted and the arm 145A can be heat pinned to the inner lens 142A, 142B, 142C. It should be understood that the lens hood 144 can omit the clip 145, for example Figure 2HWhen the clip 145 is omitted, the light shield 144 can be fastened to the corresponding inner lens of the inner lenses 142A, 142B, 142C using an adhesive. When the clip 145 is omitted, the light shield 144 can be overmolded with the inner lenses 142A, 142B, 142C.

[0062] It should be appreciated that the light shield 144 may be implemented as segments of tape (eg, opaque and / or highly reflective tape) and / or paint (eg, opaque and / or highly reflective paint).

[0063] FIG. 3A to FIG. 3E are exemplary lighting modules 200A, 200B, 200C, 200D, 200E (e.g., such as Figure 2A 1 and 1 . A perspective view of the lighting modules 150A, 150B, 150C shown in FIG. 1 is a perspective view of the lighting modules 150A, 150B, 150C shown in FIG. 1 . The lighting modules 200A, 200B, 200C, 200D, 200E may be configured to be used in a linear lighting device (e.g., such as the linear lighting device 100). Each of the lighting modules 200A, 200B, 200C, 200D, 200E may include a corresponding printed circuit board (PCB) 202 (e.g., such as the PCB 152A, 152B, 152C of the linear lighting device 100). Each of the PCBs 202 may have a length of 3 or 4 units (e.g., 3 or 4 inches, centimeters, etc.). When the PCBs 202 of the lighting modules 200A, 200B, 200C, 200D, 200E have a length of 3 or 4 units, the linear lighting device may be configured to have any length of 10 units or greater in increments of one unit. And when PCB 202 has a length of 3 or 4 units, the linear lighting device can be configured to have a length of 3 units (e.g., one 3-unit PCB), 4 units (e.g., one 4-unit PCB), 6 units (e.g., two 3-unit PCBs), 7 units (e.g., one 3-unit PCB and one 4-unit PCB), 8 units (e.g., two 4-unit PCBs), or 9 units (e.g., three 3-unit PCBs).

[0064] Each of the lighting modules 200A, 200B, 200C, 200D, 200E may include a plurality of emitter modules 210 (e.g., emitter modules 154) mounted to a corresponding PCB 202. The number of emitter modules 210 may be based on the length of the PCB of the corresponding emitter lighting module. For example, a 3-inch lighting module may include three emitter modules 210, and a 4-inch lighting module may include four emitter modules 210. The emitter modules 210 may be linearly aligned on the FIG. 3A to FIG. 3E 2. For example, the transmitter modules 210 may be spaced equally apart, such as approximately 1 inch apart. Although FIG. 3A to FIG. 3E The lighting modules 200A, 200B, 200C, 200D, 200E are shown having three or four emitter modules 210 linearly aligned and equally spaced apart, but the lighting modules 200A, 200B, 200C, 200D, 200E may have any number of emitter modules in any alignment and spaced apart any distance.

[0065] The emitter modules 210 on the lighting modules 200A, 200B, 200C, 200D, 200E may be rotated relative to each other (e.g., in a plane defined by an x-axis and a y-axis). For example, a first emitter module may be arranged in a first orientation and an adjacent emitter module may be arranged in a second orientation that is rotated a predetermined angle relative to the first orientation. Consecutive emitter modules may be arranged in orientations that are rotated a predetermined angle relative to adjacent emitter modules.

[0066] When one of the lighting modules 200A, 200B, 200C, 200D, 200E has four emitter modules (e.g., 4 inches in length), each of the emitter modules 210 may be rotated 90 degrees relative to an adjacent emitter module 210. For example, a second emitter module (e.g., in the x-direction) may be rotated 90 degrees (e.g., clockwise or counterclockwise) from a first emitter module, a third emitter module (e.g., in the x-direction) may be rotated 90 degrees in the same direction (e.g., clockwise or counterclockwise), and a fourth emitter module may be rotated 90 degrees in the same direction (e.g., clockwise or counterclockwise) relative to the third emitter module. In other words, the second emitter module may be oriented 90 degrees offset from the first emitter module, the third emitter module may be oriented 180 degrees offset from the first emitter module, and the fourth emitter module may be oriented 270 degrees offset from the first emitter module.

[0067] When one of the lighting modules 200A, 200B, 200C, 200D, 200E has three emitter modules (e.g., 3 inches in length), each of the emitter modules 210 may be rotated 120 degrees relative to an adjacent emitter module 210. For example, a second emitter module (e.g., in the x-direction) may be rotated 120 degrees (e.g., clockwise or counterclockwise) from a first emitter module, and a third emitter module (e.g., in the x-direction) may be rotated 120 degrees relative to the second emitter module in the same direction (e.g., clockwise or counterclockwise). In other words, a second emitter module may be oriented 120 degrees offset from a first emitter module, and a third emitter module may be oriented 240 degrees offset from the first emitter module.

[0068] Figure 3A An exemplary primary lighting module 200A (eg, such as Figure 2A150A shown in FIG. 15). The master lighting module 200A may include a plurality of emitter modules 210 (e.g., four) mounted to a PCB 202. The PCB 202 of the master lighting module 200A may have a length defined as four units (e.g., four inches, four centimeters, etc.). It should be understood that the master lighting module 200A may also have a length defined as three units. The master lighting module 200A may include a master control circuit 220 and an emitter control circuit 230. The master lighting module 200A may also include a drive circuit (not shown) configured to conduct current through one or more emitters of each of the emitter modules 210 so that the emitter module emits light. The emitter control circuit 230 may be configured to control the drive circuit to control the intensity level and / or color of light emitted by the plurality of emitter modules 210 mounted to the PCB 202 of the master lighting module 200A. The master control circuit 220 may be configured to receive messages (e.g., from a fixture controller, such as a light fixture controller) via, for example, the communication circuit 240. Figure 6 200A). The message may include control data and / or commands for controlling the emitter module 210. The master control circuit 220 may be configured to control one or more other lighting modules, such as slave lighting modules, based on receiving the message. For example, the communication circuit 240 may receive the message. The communication circuit 240 may forward the message to the master control circuit 220. The master control circuit 220 may send the message to the emitter control circuit 230 of the master lighting module 200A and the emitter control circuit 230 of any other slave lighting modules (e.g., such as slave lighting modules 200B, 200C, 200D, 200E) of the linear lighting device.

[0069] The main lighting module 200A may include a connector 250A (eg, Figure 2A The connector 250A is configured to connect the master lighting module 200A to a lamp controller (e.g., such as Figure 6 ) or another lighting module (e.g., a slave lighting module). The connector 250A may be a female connector. The master lighting module 200A may include a jack 260 configured to connect the master lighting module 200A to an adjacent slave lighting module. The jack 260 may be configured to receive a cable. For example, the jack 260 may include a zero insertion force (ZIF) connector. Although Figure 3AA master module 200A is depicted with one receptacle 260, but it should be understood that the master module 200A may have two receptacles 260 (e.g., one on each end of the plate 202). For example, a linear lighting device may have more than one master module 200A. When there are two or more master modules in a linear lighting device, the first master module may be a starter master module (e.g., such as master module 200A) with one receptacle 260, and the second master module may be a master intermediate module with two receptacles 260. The master intermediate module may be configured to connect to two slave lighting modules (e.g., one slave lighting module on each side of the master intermediate module).

[0070] Figure 3B An exemplary slave lighting module 200B (eg, an intermediate slave lighting module such as Figure 2A 200B). The slave lighting module 200B may include a plurality of emitter modules 210 (e.g., four) mounted to a PCB 202. The PCB 202 of the slave lighting module 200B may have a length defined as four units (e.g., four inches, four centimeters, etc.). The slave lighting 200B may include an emitter control circuit 230. The slave lighting module 200B may also include a drive circuit (not shown) configured to conduct current through one or more emitters of each of the emitter modules 210 so that the emitter module emits light. The emitter control circuit 230 of the slave lighting module 200B may receive a message from the master lighting module 200A. The emitter control circuit 230 may be configured to control the drive circuit to control the intensity level and / or color of light emitted by the plurality of emitter modules 210 mounted to the PCB 202 of the slave lighting module 200B. The slave lighting module 200B may include a pair of jacks 260 configured to connect the slave lighting module 200B to one or more adjacent slave lighting modules and / or the master lighting module. The jacks 260 may be configured to receive cables. For example, the jacks 260 may include zero insertion force (ZIF) connectors.

[0071] Figure 3CAnother exemplary slave lighting module 200C (e.g., an intermediate slave lighting module) is depicted. The slave lighting module 200C may include a plurality of emitter modules 210 (e.g., three) mounted to a PCB 202. The PCB 202 of the slave lighting module 200C may have a length defined as three units (e.g., three inches, three centimeters, etc.). The slave lighting module 200C may include an emitter control circuit 230 (e.g., an emitter processor). The emitter control circuit 230 of the slave lighting module 200C may receive messages from the master lighting module 200A. The slave lighting module 200C may also include a drive circuit (not shown) configured to conduct current through one or more emitters of each of the emitter modules 210 so that the emitter modules emit light. The emitter control circuit 230 may be configured to control the drive circuit to control the intensity level and / or color of light emitted by the plurality of emitter modules 210 mounted to the PCB 202 of the slave lighting module 200C. The slave transmitter PCB 200C may include a pair of jacks 260 configured to connect the slave lighting module 200B to one or more adjacent slave lighting modules and / or the master lighting module. The jacks 260 may be configured to receive cables. For example, the jacks 260 may include zero insertion force (ZIF) connectors.

[0072] Figure 3D An exemplary slave lighting module 200D (eg, an end slave lighting module such as Figure 2A 150C shown in FIG. 150A ). The slave lighting module 200D may include a plurality of lighting modules 210 (e.g., four) mounted to the PCB 202. The PCB 202 of the slave lighting module 200D may have a length defined as four units (e.g., four inches, four centimeters, etc.). The slave lighting module 200D may include an emitter control circuit 230. The emitter control circuit 230 of the slave lighting module 200D may receive a message from the master lighting module 200A. The slave lighting module 200D may also include a drive circuit (not shown) configured to conduct current through one or more emitters of each of the emitter modules 210 so that the emitter module emits light. The emitter control circuit 230 may be configured to control the drive circuit to control the intensity level and / or color of light emitted by the plurality of emitter modules 210 mounted to the PCB 202 of the slave lighting module 200D. The slave lighting module 200D may include a connector 250B (e.g., Figure 2A250B) is configured to connect the slave lighting module 200D to another linear lighting device (e.g., a master lighting module of another linear lighting device). The connector 250B can be a male connector. The slave lighting module 200D can include a socket 260 configured to connect the slave lighting module 200D to an adjacent slave lighting module or a master lighting module. The socket 260 can be configured to receive a cable. For example, the socket 260 can include a zero insertion force (ZIF) connector.

[0073] Figure 3E An exemplary slave lighting module 200E (e.g., an end slave lighting module) is depicted. The slave lighting module 200E may include a plurality of emitter modules 210 (e.g., three) mounted to a PCB 202. The PCB 202 of the slave lighting module 200E may have a length defined as three units (e.g., three inches, three centimeters, etc.). The slave lighting module 200E may include an emitter control circuit 230 (e.g., an emitter processor). The emitter control circuit 230 of the slave lighting module 200E may receive messages from the master lighting module 200A. The slave lighting module 200E may also include a drive circuit (not shown) configured to conduct current through one or more emitters of each of the emitter modules 210 so that the emitter modules emit light. The emitter control circuit 230 may be configured to control the drive circuit to control the intensity level and / or color of light emitted by the plurality of emitter modules 210 mounted to the PCB 202 of the slave lighting module 200E. The slave lighting module 200E may include a connector 250B (eg, Figure 2A 250B) is configured to connect the slave lighting module 200E to another linear lighting device (e.g., a master lighting module of another linear lighting device). The connector 250B can be a male connector. The slave lighting device 200E can include a socket 260, which is configured to connect the slave lighting device 200E to an adjacent slave lighting module or a master lighting module. The socket 260 can be configured to receive a cable. For example, the socket 260 can include a zero insertion force (ZIF) connector.

[0074] Figure 4A is an exemplary transmitter module 300 (eg, a transmitter assembly) (eg, FIG. 2A to FIG. 2C and Figure 2E The transmitter module 154 shown in FIG. 1 and / or FIG. 3A to FIG. 3E A top view of the transmitter module 210 shown in FIG. Figure 4B is a side cross-sectional view of the transmitter module 300, the side cross-sectional view being through the center of the transmitter module (e.g., through Figure 4A). The emitter module 300 may include an array of emitters 310 (e.g., emitting LEDs). In some examples, the emitter module 300 may also include (e.g., optionally include) a detector 312 (e.g., a detecting LED). For example, the emitter module 300 may include four emitters 310 and two detectors 312, such as Figure 4A . In some examples, the emitter 310 and the detector 312 may be mounted on a substrate 314. The emitter 310 and the detector 312 may be enclosed by a dome 316. The emitter 310, the detector 312, the substrate 314, and the dome 316 may form an optical system. The emitters 310 may each emit light of different colors (e.g., red, green, blue, and white or amber), and may be arranged together in a square array as close as possible in the center of the dome 316 to be close to a point source located in the center. The detector 312 may be any device that generates a current indicative of incident light, such as a silicon photodiode or an LED. For example, the detectors 312 may each be an LED having a peak emission wavelength in the range of approximately 550nm to 700nm, so that the detector 312 may not generate a photocurrent in response to infrared light (e.g., to reduce interference from ambient light). For example, a first detector in the detector 312 may include a small red, orange, or yellow LED that can be used to measure the luminous flux of light emitted by the red LED of the emitter 310. A second one of detectors 312 may include a green LED that may be used to measure a respective luminous flux of light emitted by each of the green and blue LEDs of emitter 310. Both detectors 312 may be used to measure the luminous flux of the white LEDs of emitter 310 at different wavelengths (e.g., to characterize the spectrum of light emitted by the white LEDs).

[0075] Substrate 314 may be mounted to a printed circuit board (PCB) (e.g., PCBs 152A, 152B, 152C, and / or PCB 202) that includes drive and control circuitry for emitter module 300. Substrate 314 of emitter module 300 may be a ceramic substrate formed of an aluminum nitride or aluminum oxide material or some other reflective material, and may be used to increase the output efficiency of emitter module 300 by reflecting light from the emitter module through dome 316. In some examples, emitter 310 and / or detector 312 of emitter module 310 may be mounted directly to a printed circuit board that includes drive and control circuitry for emitter module 300. For example, the printed circuit board may be a rigid PCB (e.g., made of FR4 material) and / or a metal core PCB.

[0076] The dome 316 may comprise an optically transmissive material such as silicon, and may be formed, for example, by an overmolding process. The surface of the dome 316 may be slightly textured to increase light scattering and promote color mixing, and reflect a small amount of emitted light back toward the detector 312 mounted on the substrate 314 (e.g., about 5%). The size of the dome 316 (e.g., the diameter of the dome in the plane of the LED 310) may generally depend on the size of the LED array. The diameter of the dome may be substantially larger than the diameter of the array of LEDs 310 (e.g., approximately 1.5 to 4 times) to prevent total internal reflection from occurring. The size and shape (e.g., curvature) of the dome 316 may also enhance color mixing when the emitter module 300 is mounted adjacent to other emitter modules (e.g., similar to the emitter module 210 mounted to the emitter PCB 200A, 200B, 200C, 200D, 200E of the linear lighting device 100). For example, the dome 316 may be Figure 4B The radius r of dome 316 in the plane of the emitter array 310 is 圆顶状体 For example, the radius of curvature r of the dome-shaped body 316 may be 曲线 For example, the radius r of dome 316 in the plane of LED 310 is about 20% to 30%. 圆顶状体 may be approximately 4.8 mm, and the radius of curvature of the dome-shaped body r 曲线 (For example, the maximum height of the dome 316 above the plane of the LED 310) can be approximately 3.75 mm. Alternatively, the dome 316 can have a hemispherical shape. In addition, those skilled in the art will appreciate that alternative radii and ratios can be used to achieve the same or similar color mixing results.

[0077] By configuring the dome 316 to have a significantly flatter shape, the dome 316 allows a greater portion of the emitted light to emanate laterally from the emitter module 300 (e.g., at Figure 5 A and Figure 5 In other words, the shallow shape of dome 316 allows a significant portion of the light emitted by emitter 310 to be emitted at a small angle θ relative to the horizontal plane of the array of emitters 310. 侧面Exit dome. For example, dome 316 may allow approximately 40% of the light emitted by the array of emitters 310 to exit dome 316 at approximately 0 to 30 degrees relative to the horizontal plane of the array of emitters 310. When emitter module 300 is mounted adjacent to other emitter modules (e.g., in a linear light source (such as linear lighting device 100)), the shallow shape of dome 316 may improve color mixing in the linear lighting device by allowing a large portion (e.g., 40%) of the light emitted from the sides of adjacent emitter modules to mix with each other before being reflected back from the linear lighting device. Examples of emitter modules (such as emitter module 200) are described in more detail in U.S. Patent No. 10,161,786, issued on December 25, 2018, entitled "EMITTER MODULE FOR AN LED ILLUMINATION DEVICE," the entire disclosure of which is hereby incorporated by reference.

[0078] Figure 5 4 is a perspective view of a plurality of exemplary linear lighting devices 400A, 400B, 400C connected together. The linear lighting devices 400A, 400B, 400C may be connected directly (e.g., via an end-to-end connection 410) or via a wired connection 420. For example, the linear lighting device 400A may be directly connected to the linear lighting device 400B using the end-to-end connection 410. The end-to-end connection 410 may include a male connector (e.g., such as a male connector) of the linear lighting device 400A. Figure 1 The connector 132B shown in FIG. Figure 3D , Figure 3E 250B), the male connector and the female connector (eg, such as Figure 1 , the connector 132A shown in FIG. 2 and / or Figure 3A 4. The end-to-end connection 410 is shown as being a straight connection, but it should be understood that the end-to-end connection 410 may also include an angled connection (e.g., such as a 90 degree connection). The linear lighting device 400B may be connected to the linear lighting device 400C using a wired connection 420. The wired connection 420 may include a cable 422 configured to connect to a connector (e.g., such as a 90 degree connection) of the linear lighting device 400B. Figure 1 The connector 132B shown in FIG. Figure 3D , Figure 3E The cable 422 may be configured to engage with (eg, be received by or be located within) a connector 250B as shown in FIG. 400C. Figure 1 , the connector 132A shown in FIG. 2 and / or Figure 3A400B, 400C). The length of the cable 422 can be configured based on the installation location of the linear lighting device 400B, 400C.

[0079] although Figure 5 Three linear lighting devices 400A, 400B, 400C are depicted connected together using end-to-end connections 410 and wired connections 420, but it should be understood that more than three or less than three linear lighting devices can be connected together using any combination of end-to-end connections 410 and / or wired connections 420.

[0080] Figure 6 5 is a simplified block diagram of a lighting system 500 (eg, a linear lighting system). The lighting system 500 may include a plurality of linear lighting devices 510A, 510B (eg, such as Figure 1 , the linear lighting device 100 shown in FIG. 2 and / or Figure 5 400A, 400B, 400C) and a lamp controller 520 (e.g., a controller and / or a lighting controller). The lamp controller 520 can receive a line voltage input (e.g., an alternating current (AC) main line voltage from an AC power source) and can generate a direct current (DC) bus voltage on a power bus 530 (e.g., power wiring) to power the plurality of linear lighting devices 510A, 510B. Each of the linear lighting devices 510A, 510B can include one or more master lighting modules 512 (e.g., such as Figure 3A ) and one or more slave lighting modules 514 (e.g., such as FIG. 3B to FIG. 3E 200B, 200C, 200D, 200E shown in FIG. 200B, 200C, 200D, 200E). Each of the master lighting module 512 and the slave lighting module 514 of the linear lighting device 510A, 510B can be coupled to the power bus 530 to receive the DC bus voltage. Although the master lighting module 512 is illustrated as being closest to the light fixture controller 520, in some examples, the linear lighting device 510A can be connected to the light fixture controller 520 (e.g., rotated) so that the slave lighting module 514 is located between the light fixture controller 520 and the master lighting module 512.

[0081] The light fixture controller 520 may include communication circuitry configured to communicate (e.g., transmit and / or receive) messages that may include control data and / or commands for controlling the plurality of linear lighting devices 510A, 510B and / or external devices (e.g., other control devices of a load control system, such as a remote control device and / or a system controller). The light fixture controller 520 may be configured to communicate messages via wireless signals over a wireless communication link (e.g., a radio frequency (RF) communication link) and / or via a wired communication link (e.g., a digital or analog communication link). The lamp controller 520 can be configured to receive a message including control data and / or commands for controlling the linear lighting devices 510A, 510B (e.g., for controlling the intensity and / or color of the linear lighting devices 510A, 510B) from an external device, and can be configured to transmit a message including control data and / or commands to the linear lighting devices 510A, 510B (e.g., the master lighting module 512), wherein the control data and / or commands are used to control the linear lighting devices 510A, 510B (e.g., for controlling the intensity and / or color of the linear lighting devices 510A, 510B).

[0082] A single lamp controller (e.g., such as lamp controller 520) may be used to control and / or power multiple linear lighting devices (e.g., such as linear lighting devices 510A, 510B) connected together in the lighting system 500. The lamp controller 520 may be configured to communicate messages with the multiple linear lighting devices 510A, 510B. For example, the lamp controller 520 may transmit one or more messages to a master lighting module 512 of each of the multiple linear lighting devices 510A, 510B via a master communication bus 540 (e.g., a first wired digital communication link, such as an RS-485 communication link). In some examples, the master communication bus 540 may be connected to the master lighting modules 512 (e.g., all master lighting modules 512), but not to the slave lighting modules 514. Each of the master lighting modules 512 may include a master communication circuit (e.g., Figure 3A ) for transmitting and / or receiving messages on the main communication bus 540. In some examples, such as when the main communication bus 540 is an RS-485 communication link, the main communication circuit can be an RS-485 transceiver. The messages can include control data and / or commands for controlling the linear lighting devices 510A, 510B (e.g., intensity, color control information, etc., requests for information from the linear lighting devices 510A, 510B (e.g., such as addressing information), etc.).

[0083] The master lighting module 512 may communicate with the slave communication bus 550 (eg, an inter-integrated circuit (I 2The master lighting module 512 may be coupled to a plurality of slave lighting modules 514 by means of a communication link (C) , a timing signal line 560 (e.g., a timing signal conductor) and / or an interrupt request (IRQ) signal line 570 (e.g., an IRQ conductor) . The master lighting module 512 may receive messages from the light fixture controller 520 and may forward the messages to the slave lighting modules 514 via the slave communication bus 550. For example, the master lighting module 512 may convert messages from the RS-485 communication protocol into an I2C signal. 2 C communication protocol for transmission via the slave communication bus 550. In some examples, the master lighting module 512 can communicate control messages via the slave communication bus 550, the control messages including control data and / or commands (eg, intensity and / or color control commands).

[0084] The luminaire controller 520 may be configured to control the intensity level and / or color (e.g., color temperature) of the light emitted by each of the master lighting module 512 and the slave lighting module 514. The luminaire controller 520 may be configured to control the intensity level and / or color of each of the master lighting module 512 and the slave lighting module 514, either individually or collectively. For example, the luminaire controller 520 may be configured to control the master lighting module 512 and the slave lighting module 514 of one of the linear lighting devices 510A, 510B to the same intensity level and / or the same color, or to different intensity levels and / or different colors. Furthermore, in some examples, the luminaire controller 520 may be configured to control the master lighting module 512 and the slave lighting module 514 of one of the linear lighting devices 510A, 510B to different intensity levels and / or colors in an organized manner to provide a visual effect, such as providing a gradient of intensity levels and / or colors along the length of one or more of the linear lighting devices 510A, 510B.

[0085] Each of the slave lighting modules 514 can be configured to use the IRQ signal line 570 to signal the corresponding master lighting module 512 that maintenance is required and / or that the slave lighting module 512 has a message to transmit to the master lighting module 512. In some examples, the IRQ signal line 570 is used to configure the slave lighting modules 514, for example, to determine the order and / or position of each slave lighting module 514 as part of the linear lighting device.

[0086] As described in more detail herein, the master lighting module 512 can receive messages from the light fixture controller 520 via the master communication bus 540. In some examples, the light fixture controller 520 can be configured to interrupt the transmission of messages on the master communication bus 540 to generate synchronization pulses (e.g., synchronization frames). The light fixture controller 520 can periodically generate synchronization pulses on the master communication bus 540 during periods when no other communications are occurring on the master communication bus 540. The master lighting module 512 can be configured to generate a timing signal that the slave lighting module 514 receives on the timing signal line 560. In some examples, the master lighting module 512 can receive the synchronization pulse from the light fixture controller 520 and, in response, generate a timing signal on the timing signal line 560, where, for example, the timing signal can be a sinusoidal waveform generated at a frequency determined based on the frequency of the synchronization pulse received from the light fixture controller 120. The master lighting module 512 and the slave lighting module 514 can use the timing signal to coordinate the timing at which the master lighting module 512 and the slave lighting module 514 can perform measurement processes (e.g., to reduce the possibility of any module interfering with the measurement process of another module). For example, the master lighting module 512 and the slave lighting module 514 can use the timing signal to determine the time to measure the optical feedback information of the lighting load of their module, for example, to perform color and / or intensity control improvements when other master lighting modules and slave lighting modules are not emitting light.

[0087] Figure 7 is an exemplary lamp controller 700 (e.g., a lighting controller such as Figure 6 The lamp controller 700 may include a radio frequency interference (RFI) filter and rectifier circuit 750, which may receive a source voltage, such as an AC mains voltage V, via a hot line connection H and a neutral line connection N. AC The radio frequency interference (RFI) filter and rectifier circuit 750 may be configured to receive the AC mains voltage V AC Generate rectified voltage V R The radio frequency interference (RFI) filter and rectifier circuit 750 may also be configured to minimize noise provided on the AC mains (eg, at the hot connection H and the neutral connection N).

[0088] The lamp controller 700 may further include a power converter circuit 752, which may be connected between the bus capacitor C 总线 The rectified voltage V R And generate DC bus voltage V 总线 (eg, approximately 15V to 20V). The lamp controller 700 can connect the DC bus voltage V 总线The power conversion circuit 752 may include, for example, a boost converter, a buck converter, a buck-boost converter, a flyback converter, a single-ended primary coil inductor converter (SEPIC), converter and / or any other suitable power conversion circuit for generating an appropriate bus voltage. The lamp controller 700 may include a power supply 748 that may receive a DC bus voltage V 总线 And generate the supply voltage V CC , the supply voltage can be used to power one or more circuits (eg, low voltage circuits) of the lamp controller 700 .

[0089] The lamp controller 700 may include a lamp control circuit 736. The lamp control circuit 736 may include, for example, a microprocessor, a microcontroller, a programmable logic device (PLD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or any other suitable processing device or controller. The lamp control circuit 736 may be powered by a power supply 748 (e.g., a supply voltage V CC ) is powered. The lamp controller 700 may include a memory 746 configured to store information associated with the lamp controller 700 (e.g., one or more operating characteristics of the lamp controller 700). For example, the memory 746 may be implemented as an external integrated circuit (IC) or an internal circuit of the lamp control circuit 736.

[0090] The lamp controller 700 may include a serial communication circuit 738 that may be configured to communicate on a serial communication bus 740 via the connector 732. For example, the serial communication bus 740 may be an example of a main communication bus 540 (e.g., a wired digital communication link, such as an RS-485 communication link). The serial communication bus 740 may include a terminal resistor 734 that may be coupled across each line of the serial communication bus 740. For example, the resistance of the terminal resistor 734 may be matched to the differential characteristic impedance of the main communication bus 740 to minimize reflections on the main communication bus 740.

[0091] The lamp control circuit 736 may control the serial communication circuit 738 to transmit messages to one or more master lighting modules (e.g., master lighting module 200A, master lighting module 512, and / or master lighting module 800) via the serial communication bus 740, for example, to control one or more characteristics of the master lighting module. For example, the lamp control circuit 736 may transmit control signals to the master lighting module to control the intensity (e.g., brightness) and / or color (e.g., color temperature) of light emitted by the master lighting module (e.g., the light source of the master lighting module). In addition, the lamp control circuit 736 may be configured to indirectly control the operation of slave modules (e.g., intermediate slave modules and / or end slave modules, such as slave lighting modules 200B, 200C, 200D, 200E, and / or 514) by communicating messages to the master lighting module via the serial communication circuit 738 and the serial communication bus 740. For example, the lamp control circuit 736 may control the intensity and / or color of light emitted by the slave lighting module.

[0092] The lamp control circuit 736 may receive input from the line synchronization circuit 754. The line synchronization circuit 754 may receive the rectified voltage V R Alternatively or in addition, the line synchronization circuit 754 may receive the AC mains voltage V directly from the live connection H and the neutral connection N. AC For example, the line synchronization circuit 754 may include a zero-crossing detection circuit, which may be configured to generate a zero-crossing signal V ZC , the zero-crossing signal may indicate the AC mains voltage V AC The lamp control circuit 736 can use the zero-crossing signal V from the line synchronization circuit 754 ZC For example, a synchronization pulse may be generated on the main communication bus 740 (eg, the main communication bus 540), for example, according to the AC mains voltage V AC frequency (e.g., using the AC mains voltage V AC The timing of the zero crossing of the lamp controller 700) synchronizes the lamp controller 700 and / or the device controlled by the lamp controller 700.

[0093] The lamp control circuit 736 may be configured to generate a synchronization pulse (eg, a synchronization frame) on the serial communication bus 740. The lamp control circuit 736 may use the zero-crossing signal V from the line synchronization circuit 754 to generate a synchronization pulse (eg, a synchronization frame) on the serial communication bus 740. ZC For example, according to the AC mains voltage V AC frequency (e.g., using the AC mains voltage V ACThe master lighting module 514 may be connected to the serial communication bus 740 and the master lighting module 514 may be connected to the serial communication bus 740 to generate a synchronization pulse. The synchronization pulse may include a digital signal or an analog signal. In some examples, the synchronization pulse is a synchronization frame generated on the serial communication bus 740. In such an example, the lamp control circuit 736 may be configured to stop transmitting messages on the serial communication bus 740 when the synchronization pulse is generated on the serial communication bus 740. In this way, the master lighting module can use the synchronization pulse to generate a timing signal, which can be used by the master lighting module and the slave lighting module to coordinate the timing of the master lighting module and the slave lighting module to perform the measurement process. For example, the synchronization pulse can be generated during a frame synchronization period that can occur periodically and can generate a synchronization pulse. In addition, as described in more detail herein, the master lighting module connected to the serial communication bus 740 can receive the synchronization pulse, and the master lighting module can be configured to generate a timing signal that can be received by the slave lighting module 514 via a separate electrical connection (e.g., the timing signal line 560).

[0094] The light fixture control circuit 736 may be configured to receive messages from the master lighting module via the serial communication bus 740. For example, the master lighting module may transmit feedback information regarding the status of the master lighting module and / or the slave lighting modules via the serial communication bus 740. The serial communication circuit 738 may receive messages from the master lighting module, for example, in response to queries transmitted by the light fixture control circuit 736.

[0095] The lamp controller 700 may include a wireless communication circuit 744. The lamp control circuit 736 may be configured to transmit and / or receive messages via the wireless communication circuit 744. The wireless communication circuit 744 may include a radio frequency (RF) transceiver coupled to an antenna 742 for transmitting and / or receiving RF signals. The wireless communication circuit 744 may be an RF transmitter for transmitting RF signals, an RF receiver for receiving RF signals, or an infrared (IR) transmitter and / or receiver for transmitting and / or receiving IR signals. The wireless communication circuit 744 may be configured to transmit and / or receive messages (e.g., via the antenna 742). For example, the wireless communication circuit 744 may transmit a message in response to a signal received from the lamp control circuit 736. The fixture control circuit 736 may be configured to transmit and / or receive, for example, feedback information regarding the status of one or more linear lighting devices (such as linear lighting devices 100, 400A, 400B, 400C, 510A, 510B) and / or messages including control data and / or commands for controlling one or more linear lighting devices.

[0096] Figure 8is a simplified block diagram of an exemplary master lighting module 800 (e.g., a starter module, such as master module 150A, 200A, and / or 512). Each linear lighting device may include the master lighting module 800 and one or more slave lighting modules (e.g., slave modules 150B, 150C, 200B-200E, 514). The master lighting module 800 may be the first module of the linear lighting device (e.g., linear lighting device 100, 400A, 400B, 400C, 510A, and / or 510B). That is, when looking at the physical order of the master lighting module and the slave lighting modules of the linear lighting device, the master lighting module 800 may be the first lighting module to receive the DC bus voltage. Alternatively, in other examples, one or more slave lighting modules may be the first module of the linear lighting device (e.g., the slave lighting modules may receive the DC bus voltage before the master lighting module 800).

[0097] The master lighting module 800 may include one or more emitter modules 810 (eg, emitter modules 154, 210, and / or 300), wherein each emitter module 810 may include one or more strings of emitters 811, 812, 813, 814. Figure 8 814 is shown as a single LED, but each of the emitters 811, 812, 813, 814 may include a plurality of LEDs connected in series (e.g., a series of LEDs), a plurality of LEDs connected in parallel, or a suitable combination thereof, depending on the particular lighting system. In addition, each of the emitters 811, 812, 813, 814 may include one or more organic light emitting diodes (OLEDs). For example, the first emitter 811 may represent a series of red LEDs, the second emitter 812 may represent a series of blue LEDs, the third emitter 813 may represent a series of green LEDs, and the fourth emitter 814 may represent a series of white or amber LEDs.

[0098] The master lighting module 800 may control the emitters 811, 812, 813, 814 to adjust the intensity level (e.g., luminous flux or brightness) and / or color (e.g., color temperature) of the cumulative light output of the master lighting module 800. The emitter module 810 may also include one or more detectors 816, 818 (e.g., detector 312), which may generate corresponding detector signals (e.g., photodiode current I PD1 ,I PD2 ). In an example, the detectors 816, 818 may be photodiodes. For example, the first detector 816 may represent a single red, orange, or yellow LED, or multiple red, orange, or yellow LEDs in parallel, and the second detector 818 may represent a single green LED or multiple green LEDs in parallel.

[0099] The master lighting module 800 may include a power supply 848 that may receive a source voltage, such as a DC bus voltage (eg, a DC bus voltage V on the power bus 530) via a first connection 830. 总线 The power supply 848 can generate an internal DC supply voltage V that can be used to power one or more circuits (eg, low voltage circuits) of the main lighting module 800. CC .

[0100] The master lighting module 800 may include an LED driver circuit 832. The LED driver circuit 832 may be configured to control (e.g., individually control) the power delivered to each of the emitters 811, 812, 813, 814 of the emitter module 810 and / or the luminous flux of light emitted by each of the emitters 811, 812, 813, 814 of the emitter module 810. The LED driver circuit 832 may receive a bus voltage V 总线 And the corresponding LED driving current I conducted through the transmitters 811, 812, 813, 814 can be adjusted LED1 ,I LED2 ,I LED3 ,I LED4 The LED driving circuit 832 may include one or more regulating circuits (eg, four regulating circuits), such as for controlling the corresponding LED driving current I LED1 To I LED4 An example of LED driver circuit 832 is described in more detail in U.S. Patent No. 9,485,813, issued on November 1, 2016, entitled “ILLUMINATION DEVICE AND METHODFOR AVOIDING AN OVER-POWER OR OVER-CURRENT CONDITION IN APOWER CONVERTER,” the disclosure of which is hereby incorporated by reference.

[0101] The master lighting module 800 may include a receiver circuit 834 that may be electrically coupled to the detectors 816, 818 of the transmitter module 810 for responding to the photodiode current I PD1 ,I PD2 The corresponding optical feedback signal V FB1 、V FB2 The receiver circuit 834 may include one or more transimpedance amplifiers (eg, two transimpedance amplifiers) for converting the corresponding photodiode current I PD1 ,I PD2 Converted into an optical feedback signal V FB1 、VFB2 For example, the optical feedback signal V FB1 、V FB2 may have a DC magnitude indicative of the corresponding photodiode current I PD1 ,I PD2 The value of .

[0102] The master lighting module 800 may include a transmitter control circuit 836 for controlling the LED driver circuit 832 to control the intensity and / or color of the transmitters 811, 812, 813, 814 of the transmitter module 810. The transmitter control circuit 836 may include, for example, a microprocessor, a microcontroller, a programmable logic device (PLD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or any other suitable processing device or controller. The transmitter control circuit 836 may be powered by a power supply 848 (e.g., receiving a voltage V CC ). The transmitter control circuit 836 may generate one or more drive signals V DR1 、V DR2 、V DR3 、V DR4 The transmitter control circuit 836 can receive the optical feedback signal V from the receiver circuit 834. FB1 、V FB2 To determine the luminous flux L of the light emitted by emitters 811, 812, 813, 814 E .

[0103] The emitter control circuit 836 can receive a plurality of emitter forward voltage feedback signals V from the LED driving circuit 832. FE1 、V FE2 、V FE3 、V FE4 and receives multiple detector positive voltage feedback signals V from the receiver circuit 834 FD1 、V FD2 . Emitter forward voltage feedback signal V FE1 -V FE4 The magnitude of the forward voltage of the corresponding emitter 811, 812, 813, 814 may indicate the temperature T of the corresponding emitter. E1 , T E2 , T E3 , T E4 If each emitter 811, 812, 813, 814 includes a plurality of LEDs electrically connected in series, then the emitter forward voltage feedback signal V FE1 -V FE4The detector forward voltage feedback signal V may represent the magnitude of the forward voltage on a single LED in the LED or the cumulative forward voltage generated across multiple LEDs in a series (e.g., all series-connected LEDs in a series). FD1 、V FD2 The magnitude of the forward voltage of the respective detector 816, 818 may represent the magnitude of the forward voltage, which may indicate the temperature T of the respective detector. D1 , T D2 For example, the detector positive voltage feedback signal V FD1 、V FD2 may be equal to the forward voltage V of the corresponding detector 816, 818 FD .

[0104] The master lighting module 800 may include a master control circuit 850. The master control circuit 850 may include, for example, a microprocessor, a microcontroller, a programmable logic device (PLD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or any other suitable processing device or controller. The master control circuit 850 may be electrically coupled to a lamp controller (e.g., lamp controller 520, 700) via a communication bus 840 (e.g., a master communication bus, such as an RS-485 communication link). The master control circuit 850 may be electrically coupled to a lamp controller (e.g., lamp controller 520, 700) via one or more electrical connections (e.g., a communication bus 842 (e.g., a slave communication bus, such as an I 2 C communication link), timing signal line 844 and / or IRQ signal line 846) are electrically connected to the slave lighting module. The master control circuit 850 can be powered by a power supply 848 (e.g., receiving a voltage V CC ).

[0105] The master lighting module 800 may include a serial communication circuit 854 that couples the master control circuit 850 to the communication bus 840. The serial communication circuit 854 may be configured to communicate with the light fixture controller via the communication bus 840. For example, the communication bus 840 may be an example of the communication bus 540 and / or the communication bus 740. The master lighting module 800 may include a terminal resistor 858 that is coupled in series with a controllable switch circuit 856 between the lines of the communication bus 840. For example, the resistance of the terminal resistor 858 may be matched to the differential characteristic impedance of the master communication bus 840 to minimize reflections on the communication bus 840. The master control circuit 850 may be configured to control the controllable switch circuit 856 to control when the terminal resistor 858 is coupled between the lines of the communication bus 840. The master control circuit 850 is configured to determine a target intensity L of the master lighting module 800 and / or one or more slave lighting modules in response to a message received via the serial communication circuit 854 (e.g., from the light fixture controller via the communication bus 840). TRGTFor example, the master control circuit 850 may be configured to control the emitter control circuit 836, for example, in response to a message received via the communication bus 840, to control the intensity level (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the cumulative light emitted by the emitter module 810 of the master lighting module 800. That is, the master control circuit 850 may be configured to control the emitter control circuit 836, for example, to control the LED drive circuit 832 and the emitter module 810.

[0106] The main control circuit 850 can be configured to communicate with the user via the communication bus 842 (e.g., using I 2 The master control circuit 850 may be configured to communicate with one or more slave lighting modules using a C communication protocol. The communication bus 842 may be, for example, a slave communication bus 550. For example, the master control circuit 850 may be configured to transmit messages including control data and / or commands to the slave lighting modules via the communication bus 842, for example, in response to messages received via the communication bus 840, to control the emitter modules of one or more slave lighting modules to control the intensity level (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the accumulated light emitted by the emitter modules of the slave lighting modules.

[0107] The master control circuit 850 may be configured to calculate the current intensity L of the accumulated light emitted by the master lighting module 800 and / or the slave lighting modules. PRES (e.g., current brightness) towards the target intensity L TRGT (e.g., target brightness) adjustment. Target intensity L TRGT can be within the range across the dimming range, for example, at the low end intensity L LE (e.g., minimum intensity, such as about 0.1% to 1.0%) and high end intensity L HE (e.g., maximum intensity, such as approximately 100%). The master lighting module 800 (e.g., and / or the slave lighting module) may be configured to set the current color temperature T of the accumulated light emitted by the master lighting module 800 (e.g., and / or the slave lighting module) to PRES Towards target color temperature T TRGT In some examples, the target color temperature T TRGT The color temperature may range between a cool white color temperature (eg, approximately 3100-4500K) and a warm white color temperature (eg, approximately 2000-3000K).

[0108] In an example, the master control circuit 850 may receive a synchronization pulse on the communication bus 840 (e.g., from the light fixture controller 700). The synchronization pulse may include a digital signal or an analog signal. In some examples, the synchronization pulse is a synchronization frame generated on the communication bus 840. In such an example, the master control circuit 850 may be configured not to transmit messages with the light fixture controller on the communication bus 840 during a frame synchronization period in which the synchronization pulse may be received. As such, the master control circuit 850 may use the synchronization pulse to generate a timing signal that may be used by the master lighting module and the slave lighting module to coordinate the timing at which the master lighting module 800 and the slave lighting module may perform a measurement process. For example, the synchronization pulse may be generated during a frame synchronization period that may occur periodically and in which the synchronization pulse may be generated.

[0109] The master control circuit 850 may be configured to generate a timing signal, for example, on a timing signal line 844 (e.g., timing signal line 560). The master control circuit 850 may be configured to generate a timing signal in response to a synchronization pulse. In some examples, the timing signal may be a sinusoidal waveform generated at a frequency determined based on the frequency of the synchronization pulse received from the light fixture controller. The transmitter control circuit 836 of the master lighting module 800 and the transmitter module control circuits of the slave lighting modules (e.g., slave lighting modules connected to the communication bus 844) may receive the timing signal generated by the master control circuit 850. The master lighting module 800 and the slave lighting modules may use the timing signal to coordinate the timing of the measurement process that the master lighting module 800 and the slave lighting module 514 may perform (e.g., to reduce the possibility of any module interfering with the measurement process of another module). For example, master lighting module 800 and slave lighting modules may use the timing signals to determine when to measure optical feedback information of their module's lighting load, e.g., to perform color and / or intensity control improvements when other master and slave lighting modules are not emitting light.

[0110] The master control circuit 850 may also be configured to receive a message from the transmitter control circuit 836 and / or the transmitter control circuit of one of the slave lighting modules that requires maintenance and / or has a message to be sent via the IRQ signal line 846 (e.g., such as Figure 6 846) to the master lighting module 800. In an example, the transmitter control circuit may signal the master control circuit 850 via the IRQ signal line 846 that the transmitter control circuit needs to be serviced. In addition, the transmitter control circuit may signal the master control circuit 850 via the IRQ signal line 846 that the transmitter control circuit has a message to transmit to the master control circuit 850. In addition, the master control circuit 850 may be configured to use the IRQ signal line 846 to determine the order and / or position of each slave lighting module.

[0111] The master lighting module 800 may include a memory 852 configured to store information (e.g., one or more operating characteristics of the master lighting module 800, such as a target intensity L TRGT 、Target color temperature T TRGT , low end strength L LE , high-end strength L HE The memory 852 may be implemented as an external integrated circuit (IC) or an internal circuit of the main control circuit 850 .

[0112] When the master lighting module 800 is powered on, the master control circuit 850 can be configured to control the master lighting module 800 (e.g., the emitter of the master lighting module 800) to emit light substantially all the time. The emitter control circuit 836 can be configured to interrupt the normal emission of light during the periodic measurement interval to perform the measurement process. During the periodic measurement interval, the emitter control circuit 836 can measure one or more operating characteristics of the master lighting module 800. The measurement interval can be based on a timing signal on the synchronization line 844 (e.g., which can be based on the AC mains voltage V AC The emitter control circuit 836 may be configured to receive the timing signal and determine the specific timing of the periodic measurement interval (e.g., the frequency of the periodic measurement interval) based on (e.g., in response to) the timing signal. For example, during the measurement interval, the emitter control circuit 836 may be configured to individually turn on each of the different color emitters 811, 812, 813, 814 of the main lighting module 800 (e.g., while turning off the other emitters) and use one of the two detectors 816, 818 to measure the luminous flux of the light emitted by the emitter. For example, the emitter control circuit 836 may turn on the first emitter 811 of the emitter module 810 (e.g., while turning off the other emitters 812, 813, 814) and respond to the first optical feedback signal V generated from the first detector 816. FB1 The luminous flux L of the light emitted by the first emitter 811 is determined E In addition, the transmitter control circuit 836 can be configured to drive the transmitters 811, 812, 813, 814 and the detectors 816, 818 to generate the transmitter forward voltage feedback signal V during the measurement interval. FE1 -V FE4 and the detector positive voltage feedback signal V FD1 、V FD2 .

[0113] U.S. Patent No. 9,332,598, issued on May 3, 2016, entitled “INTERFERENCE-RESISTANT COMPENSATION FOR ILLUMINATION DE VICES HAVING MULTIPLE EMITTER MODULES,” U.S. Patent No. 9,392,660, issued on July 12, 2016, entitled “LED ILLUMINATION DEVICE AND CALIBRATION METHOD FOR ACCURATIVE ELY CHARACTERIZING THE EMISSION LEDS AND PHOTODE TECTOR(S) INCLUDED WITHIN THE LED ILLUMINATION DE VICE,” and U.S. Patent No. 9,392,663, issued on July 12, 2016, entitled “ILLUMINATION DEVICE AND METHOD FOR CONTROLLING AN ILLUMINATION DEVICE OVER CHANGES IN DRI VE CURRENT A method of measuring operating characteristics of an emitter module in a lighting device is described in more detail in U.S. Patent No. 4,877,979, entitled "AND TEMPERATURE", the entire disclosure of which is hereby incorporated by reference.

[0114] Calibration values ​​for various operational characteristics of the master lighting module 800 may be stored in the memory 852 as part of a calibration process performed during manufacture of the master lighting module 800. Calibration values ​​for each of the emitters 811, 812, 813, 814, and / or detectors 816, 818 of the emitter module 800 may be stored. For example, calibration values ​​for measurements of luminous flux (e.g., in lumens), x chromaticity, y chromaticity, emitter forward voltage, photodiode current, and / or detector forward voltage may be stored. For example, luminous flux, x chromaticity, and / or y chromaticity measurements may be obtained from the emitters 811, 812, 813, 814 using an external calibration tool such as a spectrophotometer. In an example, the master lighting module 800 may measure the values ​​of the emitter forward voltage, photodiode current, and / or detector forward voltage internally. The external calibration tool and / or the master lighting module 800 may measure calibration values ​​for each of the emitters 811, 812, 813, 814 and / or detectors 816, 818 at a plurality of different drive currents and / or at a plurality of different operating temperatures.

[0115] After installation, the master lighting module 800 of the linear lighting device can use the calibration values ​​stored in the memory 852 to maintain a constant light output from the master lighting module 800. The master control circuit 850 can determine the target value of the luminous flux to be emitted from the emitters 811, 812, 813, 814 to achieve the target intensity L of the master lighting module 800. TRGT and / or target color temperature T TRGT The emitter control circuit 836 may determine the respective drive currents I of the emitters 811, 812, 813, 814 based on the determined target value of the luminous flux to be emitted from the emitters 811, 812, 813, 814. LED1 -I LED4 When the aging of the main lighting module 800 is zero, the corresponding driving currents I of the emitters 811, 812, 813, and 814 can be LED1 -I LED4 The value of is controlled to be the initial value I LED-初始 .

[0116] When the emitters 811, 812, 813, 814 age, the light output of the master lighting module 800 may be reduced (e.g., the maximum light output and / or the light output at a specific current or frequency). The emitter control circuit 836 may be configured to set the drive current I DR The value of increases to the adjusted value I LED-调整 , to achieve the target strength L TRGT Luminous flux and / or target color temperature T TRGT A method for adjusting the drive current of an emitter to achieve a constant light output as the emitter ages is described in more detail in U.S. Patent No. 9,769,899, issued on September 19, 2017, entitled “ILLUMINATION DEVICE AND AGE COMPENSATION METHOD,” the entire disclosure of which is hereby incorporated by reference.

[0117] Fig. 9 is an exemplary slave lighting module 900 (e.g., an intermediate slave lighting module, such as FIG. Figure 3B and Figure 3C900 is a simplified block diagram of an intermediate slave lighting module 150B, 200B, and / or 200C) shown in FIG. The intermediate slave lighting module 900 may be an intermediate module of a linear lighting fixture (e.g., such as linear lighting fixtures 100, 400A, 400B, 400C, 510A, and / or 510B). The intermediate slave lighting module 900 may include any slave lighting module residing between a master lighting module (e.g., master module 150A, 200A, 512, and / or master lighting module 800) and another slave lighting module of the linear lighting fixture.

[0118] The intermediate slave lighting module 900 may include one or more emitter modules 910 (e.g., such as emitter modules 154, 210, and / or 300). For example, the intermediate slave lighting module 900 may include an emitter module 910, which may include one or more strings of emitters 911, 912, 913, 914. Fig. 9 , each of the emitters 911, 912, 913, 914 is shown as a single LED, but each of the emitters may include multiple LEDs connected in series (e.g., a series of LEDs), multiple LEDs connected in parallel, or a suitable combination thereof, depending on the specific lighting system. In addition, each of the emitters 911, 912, 913, 914 may include one or more organic light emitting diodes (OLEDs). For example, the first emitter 911 may represent a series of red LEDs, the second emitter 912 may represent a series of blue LEDs, the third emitter 913 may represent a series of green LEDs, and the fourth emitter 914 may represent a series of white or amber LEDs.

[0119] The intermediate slave lighting module 900 can control the emitters 911, 912, 913, 914 to adjust the intensity level (e.g., luminous flux or brightness) and / or color (e.g., color temperature) of the cumulative light output of the intermediate slave lighting module 900. The emitter module 910 can also include one or more detectors 916, 918 (e.g., detector 312), which can generate corresponding photodiode currents I in response to incident light. PD1 ,I PD2 (e.g., detector signal). In an example, the detectors 916, 918 may be photodiodes. For example, the first detector 916 may represent a single red, orange, or yellow LED or multiple red, orange, or yellow LEDs in parallel, and the second detector 918 may represent a single green LED or multiple green LEDs in parallel.

[0120] The intermediate slave lighting module 900 may include a power supply 948 that may receive a source voltage, such as a DC bus voltage (eg, a DC bus voltage V on the power bus 530) via the first connection 930.总线 The power supply 948 may generate an internal DC supply voltage V that may be used to power one or more circuits (eg, low voltage circuits) of the intermediate slave lighting module 900, such as the transmitter control circuit 936. CC .

[0121] The intermediate slave lighting module 900 may include an LED driver circuit 932. The LED driver circuit 932 may be configured to control (e.g., individually control) the power delivered to each of the emitters 911, 912, 913, 914 of the emitter module 910 and / or the luminous flux of light emitted by each of the emitters 911, 912, 913, 914 of the emitter module 910. The LED driver circuit 932 may receive a bus voltage V 总线 , and can adjust the corresponding LED drive current I conducted through the transmitters 911, 912, 913, 914 LED1 ,I LED2 ,I LED3 ,I LED4 The LED driving circuit 932 may include one or more regulating circuits (eg, four regulating circuits), such as for controlling the corresponding LED driving current I LED1 -I LED4 A switching regulator (e.g., a buck converter) of the magnitude.

[0122] The intermediate slave lighting module 900 may include a receiver circuit 934 that may be electrically coupled to the detectors 916, 918 of the transmitter module 910 for detecting the photodiode current I PD1 ,I PD2 The corresponding optical feedback signal V FB1 、V FB2 The receiver circuit 934 may include one or more transimpedance amplifiers (eg, two transimpedance amplifiers) for converting the corresponding photodiode current I PD1 ,I PD2 Converted into an optical feedback signal V FB1 、V FB2 For example, the optical feedback signal V FB1 、V FB2 may have a DC magnitude indicative of the corresponding photodiode current I PD1 ,I PD2 The value of .

[0123] The intermediate slave lighting module 900 may include an emitter control circuit 936 for controlling the LED driver circuit 932 to control the intensity and / or color of the emitters 911, 912, 913, 914 of the emitter module 910. The emitter control circuit 936 may include, for example, a microprocessor, a microcontroller, a programmable logic device (PLD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or any other suitable processing device or controller. The emitter control circuit 936 may be electrically coupled to the master lighting module via one or more electrical connections, such as a communication bus 842 (e.g., a slave communication bus such as an I2C communication link), a timing signal line 844, and / or an IRQ signal line 846.

[0124] The transmitter control circuit 936 may be configured to communicate with the transmitter via the communication bus 842 (eg, using I 2 C communication protocol) to communicate with the master lighting module. The communication bus 842 may be, for example, the slave communication bus 550. For example, the emitter control circuit 936 may be configured to receive messages including control data and / or commands from the master lighting module via the communication bus 842 to control the emitter module 910 to control the intensity level (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the cumulative light emitted by the emitter module 910 of the intermediate slave lighting module 900.

[0125] The transmitter control circuit 936 may be powered by a power supply 948 (eg, receiving a voltage V CC ). The transmitter control circuit 936 may generate one or more drive signals V DR1 、V DR2 、V DR3 、V DR4 The transmitter control circuit 936 can receive the optical feedback signal V from the receiver circuit 934. FB1 、V FB2 To determine the luminous flux L of the light emitted by emitters 911, 912, 913, 914 E .

[0126] The transmitter control circuit 936 can be configured to receive a signal when the transmitter control circuit 936 requires maintenance and / or has a message to be sent via the IRQ signal line 846 (e.g., such as Figure 6The transmitter control circuit 936 may transmit an indication to the master control circuit 850 when the transmitter control circuit 936 is transmitted to the master lighting module 800 via the IRQ signal line 846. For example, the transmitter control circuit 936 may signal the master control circuit (e.g., the master control circuit 850) via the IRQ signal line 846 that service is required on the transmitter control circuit 936. In addition, the transmitter control circuit 936 may signal the master control circuit via the IRQ signal line 846 that the transmitter control circuit 936 has a message to transmit to the master control circuit.

[0127] The transmitter control circuit 936 can receive a plurality of transmitter forward voltage feedback signals V from the LED driving circuit 932. FE1 、V FE2 、V FE3 、V FE4 , and receives multiple detector positive voltage feedback signals V from the receiver circuit 934 FD1 、V FD2 . Emitter forward voltage feedback signal V FE1 -V FE4 The magnitude of the forward voltage of the corresponding emitter 911, 912, 913, 914 may indicate the temperature T of the corresponding emitter. E1 , T E2 , T E3 , T E4 If each emitter 911, 912, 913, 914 includes a plurality of LEDs electrically connected in series, then the emitter forward voltage feedback signal V FE1 -V FE4 The detector forward voltage feedback signal V may represent the magnitude of the forward voltage on a single LED in the LED or the cumulative forward voltage generated across multiple LEDs in a series (e.g., all series-connected LEDs in a series). FD1 、V FD2 The magnitude of the forward voltage of the respective detector 916, 918 may represent the magnitude of the forward voltage, which may indicate the temperature T of the respective detector. D1 , T D2 For example, the detector positive voltage feedback signal V FD1 、V FD2 can be equal to the forward voltage V of the corresponding detector 916, 918 FD .

[0128] It is worth noting that the intermediate slave lighting module 900 is not connected to the communication bus 840 (e.g., RS-485 communication link). Therefore, the transmitter control circuit 936 of the intermediate slave lighting module 900 can be connected via the communication bus 842 (e.g., using I 2C communication protocol). For example, the intermediate slave lighting module 900 may receive a message from a master lighting module (e.g., master modules 150A, 200A, 512 and / or master lighting module 800). The master control circuit (e.g., master control circuit 850) of the master lighting module may be configured to control the intermediate slave lighting module 900 so as to control the intensity (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the accumulated light emitted by the intermediate slave lighting module 900.

[0129] The master control circuit can be configured to calculate the current intensity L of the accumulated light emitted by the intermediate slave lighting module 900. PRES (e.g., current brightness) towards the target intensity L TRGT (e.g., target brightness) adjustment. Target intensity L TRGT may be within a range across the dimming range of the intermediate slave lighting module 900, for example, at the low end intensity L LE , (e.g., a minimum intensity, such as about 0.1% to 1.0%) and a high end intensity L HE , (eg, maximum intensity, such as approximately 100%). The master control circuit may be configured to set the current color temperature T of the accumulated light emitted by the intermediate slave lighting module 900 to PRES Towards target color temperature T TRGT In some examples, the target color temperature T TRGT The color temperature may range between a cool white color temperature (eg, approximately 3100-4500K) and a warm white color temperature (eg, approximately 2000-3000K).

[0130] When the intermediate slave lighting module 900 is powered on, the master control circuit can be configured to control the intermediate slave lighting module 900 (e.g., the emitter of the intermediate slave lighting module 900) to emit light substantially all the time. The emitter control circuit 936 can be configured to receive a timing signal (e.g., via the timing signal line 844 and / or the IRQ signal line 846). The emitter control circuit 936 can use the timing signal to coordinate the timing of the measurement process that the emitter control circuit 936 can perform (e.g., to reduce the possibility of any module interfering with the measurement process of another module). For example, the emitter control circuit 936 can use the timing signal to determine the time to measure the optical feedback information of the lighting load of its module, for example, to perform color and / or intensity control improvements when other master lighting modules and slave lighting modules are not emitting light.

[0131] The emitter control circuit 936 may be configured to interrupt normal emission of light during periodic measurement intervals to perform a measurement process. During the periodic measurement intervals, the emitter control circuit 936 may measure one or more operating characteristics of the intermediate slave lighting module 900. The measurement interval may be based on a timing signal on the synchronization line 844 (e.g., which may be based on the AC mains voltage V AC The emitter control circuit 936 may be configured to receive the timing signal and determine the specific timing of the periodic measurement interval (e.g., the frequency of the periodic measurement interval) based on (e.g., in response to) the timing signal. For example, during the measurement interval, the emitter control circuit 936 may be configured to individually turn on each of the different color emitters 911, 912, 913, 914 of the intermediate slave lighting module 900 (e.g., while turning off other emitters) and use one of the two detectors 916, 918 to measure the luminous flux L of the light emitted by the emitter. E For example, the emitter control circuit 936 may turn on the first emitter 911 of the emitter module 910 (e.g., while turning off the other emitters 912, 913, 914), and in response to the first optical feedback signal V generated from the first detector 916, FB1 The luminous flux L of the light emitted by the first emitter 911 is determined E In addition, the transmitter control circuit 936 can be configured to drive the transmitters 911, 912, 913, 914 and the detectors 916, 918 to generate the transmitter forward voltage feedback signal V during the measurement interval. FE1 -V FE4 and the detector positive voltage feedback signal V FD1 、V FD2 .

[0132] Calibration values ​​for various operational characteristics of the intermediate slave lighting module 900 may be stored in a memory as part of a calibration process performed during manufacturing. For example, the memory 852 of the master lighting module 800. Calibration values ​​for each of the emitters 911, 912, 913, 914 and / or detectors 916, 918 of the intermediate slave module 900 may be stored. For example, calibration values ​​for measurements of luminous flux (e.g., in lumens), x chromaticity, y chromaticity, emitter forward voltage, photodiode current, and detector forward voltage may be stored. For example, luminous flux, x chromaticity, and / or y chromaticity measurements may be obtained from the emitters 911, 912, 913, 914 using an external calibration tool such as a spectrophotometer. In an example, the intermediate slave lighting module 900 may measure the values ​​of the emitter forward voltage, photodiode current, and / or detector forward voltage internally. The external calibration tool and / or the intermediate slave lighting module 900 may measure calibration values ​​for each of the emitters 911, 912, 913, 914 and / or detectors 916, 918 at multiple different drive currents and / or at multiple different operating temperatures.

[0133] After installation, the master lighting module 800 of the linear lighting device can use the calibration values ​​stored in the memory 852 to maintain a constant light output from the intermediate slave lighting module 900. The emitter control circuit 936 can determine the target value of the luminous flux to be emitted from the emitters 911, 912, 913, 914 to achieve the target intensity L of the intermediate slave lighting module 900. TRGT and / or target color temperature T TRGT The emitter control circuit 936 may determine the respective drive currents I of the emitters 911, 912, 913, 914 based on the determined target value of the luminous flux to be emitted from the emitters 911, 912, 913, 914. LED1 -I LED4 When the aging of the intermediate slave lighting module 900 is zero, the corresponding drive currents I of the emitters 911, 912, 913, 914 can be LED1 -I LED4 The value of is controlled to be the initial value I LED-初始 .

[0134] As the emitters 911, 912, 913, 914 age, the light output (e.g., maximum light output and / or light output at a particular current or frequency) of the intermediate slave lighting module 900 may decrease. The emitter control circuit 936 may be configured to set the drive current I DR The value of increases to the adjusted value I LED-调整 To achieve the target strength L TRGT Luminous flux and / or target color temperature T TRGT The determined target value.

[0135] Fig.10 is an exemplary slave lighting module 1000 (eg, an end slave module such as FIG. 2, Figure 3D and Figure 3E The end slave lighting module 1000 may be an end lighting module of a linear lighting device (e.g., such as linear lighting devices 100, 400A, 400B, 400C, 510A, and / or 510B). The end slave lighting module 1000 may include one or more emitter modules 1010 (e.g., FIG. 2, FIG. 3A to FIG. 3E , Figure 4A and Figure 4B 1010). Transmitter module 1010 may include one or more strings of transmitters 1011, 1012, 1013, 1014. Fig.10 1014 is shown as a single LED, but each of the emitters 811, 812, 813, 814 may include a plurality of LEDs connected in series (e.g., a series of LEDs), a plurality of LEDs connected in parallel, or a suitable combination thereof, depending on the particular lighting system. In addition, each of the emitters 1011, 1012, 1013, 1014 may include one or more organic light emitting diodes (OLEDs). For example, the first emitter 1011 may represent a series of red LEDs, the second emitter 1012 may represent a series of blue LEDs, the third emitter 1013 may represent a series of green LEDs, and the fourth emitter 1014 may represent a series of white or amber LEDs.

[0136] The end slave lighting module 1000 can control the emitters 1011, 1012, 1013, 1014 to adjust the intensity level (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the cumulative light output of the end slave lighting module 1000. The emitter module 1010 can also include one or more detectors 1016, 1018 (e.g., detector 312), which can generate corresponding photodiode currents I in response to incident light. PD1 ,I PD2 (e.g., detector signal). In an example, the detectors 1016, 1018 may be photodiodes. For example, the first detector 1016 may represent a single red, orange, or yellow LED or multiple red, orange, or yellow LEDs in parallel, and the second detector 1018 may represent a single green LED or multiple green LEDs in parallel.

[0137] The end slave lighting module 1000 may include a power supply 1048 that may receive a source voltage, such as a DC bus voltage (eg, a DC bus voltage V on the power bus 530) via the first connector 1030. 总线 The power supply 1048 may generate an internal DC supply voltage V that may be used to power one or more circuits (eg, low voltage circuits) of the end slave lighting module 1000, such as the transmitter control circuit 1036. CC .

[0138] The end slave lighting module 1000 may include an LED driver circuit 1032. The LED driver circuit 1032 may be configured to control (e.g., individually control) the power delivered to each of the emitters 1011, 1012, 1013, 1014 of the emitter module 1010 and / or the luminous flux of light emitted by each of the emitters 1011, 1012, 1013, 1014 of the emitter module 1010. The LED driver circuit 1032 may receive a bus voltage V 总线 And the corresponding LED driving current I conducted through the transmitters 1011, 1012, 1013, 1014 can be adjusted LED1 ,I LED2 ,I LED3 ,I LED4 The LED driving circuit 1032 may include one or more regulating circuits (eg, four regulating circuits), such as for controlling the corresponding LED driving current I LED1 -I LED4 A switching regulator (e.g., a buck converter) of the magnitude.

[0139] The end slave lighting module 1000 may include a receiver circuit 1034 that may be electrically coupled to the detectors 1016, 1018 of the transmitter module 1010 for detecting the photodiode current I PD1 ,I PD2 The corresponding optical feedback signal V FB1 、V FB2 The receiver circuit 1034 may include one or more transimpedance amplifiers (eg, two transimpedance amplifiers) for converting the corresponding photodiode current I PD1 ,I PD2 Converted into an optical feedback signal V FB1 、V FB2 For example, the optical feedback signal V FB1 、V FB2 may have a DC magnitude indicative of the corresponding photodiode current I PD1 ,I PD2 The value of .

[0140] The intermediate slave lighting module 1000 may include a transmitter control circuit 1036 for controlling the LED driver circuit 1032 to control the intensity and / or color of the transmitters 1011, 1012, 1013, 1014 of the transmitter module 1010. The transmitter control circuit 1036 may include, for example, a microprocessor, a microcontroller, a programmable logic device (PLD), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or any other suitable processing device or controller. The transmitter control circuit 1036 may be powered by a power supply 1048 (e.g., receiving a voltage V CC ). The transmitter control circuit 1036 may generate one or more drive signals V DR1 、V DR2 、V DR3 、V DR4 The transmitter control circuit 1036 can receive the optical feedback signal V from the receiver circuit 934. FB1 、V FB2 To determine the luminous flux L of the light emitted by emitters 1011, 1012, 1013, 1014 E .

[0141] The transmitter control circuit 1036 can be configured to receive a signal when the transmitter control circuit 1036 needs maintenance and / or has a message to be sent via the IRQ signal line 846 (e.g., such as Figure 6 846) to the master lighting module 800. For example, the transmitter control circuit 1036 may signal the master control circuit (e.g., the master control circuit 850) via the IRQ signal line 846 that service is required on the transmitter control circuit 1036. Additionally, the transmitter control circuit 1036 may signal the master control circuit via the IRQ signal line 846 that the transmitter control circuit 1036 has a message to transmit to the master control circuit.

[0142] The transmitter control circuit 1036 can receive a plurality of transmitter forward voltage feedback signals V from the LED driving circuit 1032. FE1 、V FE2 、V FE3 、V FE4 , and receives multiple detector positive voltage feedback signals V from the receiver circuit 1034 FD1 、V FD2 . Emitter forward voltage feedback signal V FE1 -V FE4 The magnitude of the forward voltage of the corresponding emitter 1011, 1012, 1013, 1014 may indicate the temperature T of the corresponding emitter. E1 , TE2 , T E3 , T E4 If each emitter 1011, 1012, 1013, 1014 includes a plurality of LEDs electrically connected in series, then the emitter forward voltage feedback signal V FE1 -V FE4 The detector forward voltage feedback signal V may represent the magnitude of the forward voltage on a single LED in the LED or the cumulative forward voltage generated across multiple LEDs in a series (e.g., all series-connected LEDs in a series). FD1 、V FD2 The magnitude of the forward voltage of the respective detector 1016, 1018 may represent the magnitude of the forward voltage, which may indicate the temperature T of the respective detector. D1 , T D2 For example, the detector positive voltage feedback signal V FD1 、V FD2 can be equal to the forward voltage V of the corresponding detector 1016, 1018 FD .

[0143] The transmitter control circuit 1036 of the end slave lighting module 1000 can communicate with the end slave lighting module 1000 via the communication bus 842 (eg, the slave communication bus 550), for example, using I 2 C communication protocol. For example, the end slave lighting module 1000 may receive a message from a master lighting module (e.g., master modules 150A, 200A, 512 and / or master lighting module 800). The master control circuit of the master lighting module (e.g., master control circuit 850) may be configured to control the end slave lighting module 1000 so as to control the intensity level (e.g., brightness or luminous flux) and / or color (e.g., color temperature) of the accumulated light emitted by the end slave lighting module 1000.

[0144] The master control circuit can be configured to calculate the current intensity L of the accumulated light emitted by the end slave lighting module 1000. PRES (e.g., current brightness) towards the target intensity L TRGT (e.g., target brightness) adjustment. Target intensity L TRGT can be within the range of the dimming range of the end slave lighting module 1000, for example, at the low end intensity L LE (eg, minimum intensity, such as about 0.1% to 1.0%) and high end intensity L HE (eg, maximum intensity, such as approximately 100%). The master control circuit may be configured to set the current color temperature T of the accumulated light emitted by the end slave lighting module 1000 to PRES Towards target color temperature T TRGT Adjust. Target color temperature T TRGTThe color temperature may range between a cool white color temperature (eg, approximately 3100-4500K) and a warm white color temperature (eg, approximately 2000-3000K).

[0145] When power is applied to the end slave lighting module 1000, the master control circuit can be configured to control the end slave lighting module 1000 (e.g., the transmitter of the end slave lighting module 1000) to emit light substantially all the time. The emitter control circuit 1036 can be configured to receive a timing signal (e.g., via the timing signal line 844 and / or the IRQ signal line 846). The emitter control circuit 1036 can use the timing signal to coordinate the timing of the measurement process that the emitter control circuit 1036 can perform (e.g., to reduce the possibility of any module interfering with the measurement process of another module). For example, the emitter control circuit 1036 can use the timing signal to determine the time to measure the optical feedback information of the lighting load of its module, for example, to perform color and / or intensity control improvements when other master lighting modules and slave lighting modules are not emitting light.

[0146] The transmitter control circuit 1036 may be configured to interrupt the normal emission of light during periodic measurement intervals to perform a measurement process. During the periodic measurement intervals, the transmitter control circuit 1036 may measure one or more operating characteristics of the end slave lighting module 1000. The measurement interval may be based on a timing signal on the synchronization line 844 (e.g., which may be based on the AC mains voltage V AC The emitter control circuit 1036 may be configured to receive the timing signal and determine the specific timing of the periodic measurement interval (e.g., the frequency of the periodic measurement interval) based on (e.g., in response to) the timing signal. For example, during the measurement interval, the emitter control circuit 1036 may be configured to individually turn on each of the emitters 1011, 1012, 1013, 1014 of different colors of the end slave lighting module 1000 (e.g., while turning off other emitters) and use one of the two detectors 1016, 1018 to measure the luminous flux L of the light emitted by the emitter. E For example, the emitter control circuit 1036 may turn on the first emitter 1011 of the emitter module 1010 (e.g., while turning off the other emitters 1012, 1013, 1014), and in response to the first optical feedback signal V generated from the first detector 1016, FB1 The luminous flux L of the light emitted by the first emitter 1011 is determined E In addition, the transmitter control circuit 1036 can be configured to drive the transmitters 1011, 1012, 1013, 1014 and the detectors 1016, 1018 to generate the transmitter forward voltage feedback signal V during the measurement interval. FE1 -V FE4and the detector positive voltage feedback signal V FD1 、V FD2 .

[0147] Calibration values ​​for various operational characteristics of the end slave lighting module 1000 may be stored in a memory as part of a calibration process performed during manufacturing. For example, the memory 852 of the master lighting module 800. Calibration values ​​for each of the emitters 1011, 1012, 1013, 1014 and / or detectors 1016, 1018 of the end slave module 1000 may be stored. For example, calibration values ​​for measurements of luminous flux (e.g., in lumens), x chromaticity, y chromaticity, emitter forward voltage, photodiode current, and / or detector forward voltage may be stored. For example, luminous flux, x chromaticity, and / or y chromaticity measurements may be obtained from the emitters 1011, 1012, 1013, 1014 using an external calibration tool such as a spectrophotometer. In an example, the end slave lighting module 1000 may measure the values ​​of the emitter forward voltage, photodiode current, and / or detector forward voltage internally. An external calibration tool and / or end slave lighting module 1000 may measure calibration values ​​for each of emitters 1011, 1012, 1013, 1014 and / or detectors 1016, 1018 at multiple different drive currents and / or at multiple different operating temperatures.

[0148] After installation, the master lighting module 800 of the linear lighting device can use the calibration values ​​stored in the memory 852 to maintain a constant light output from the end slave modules 1000. The emitter control circuit 1036 can determine the target value of the luminous flux to be emitted from the emitters 1011, 1012, 1013, 1014 to achieve the target intensity L of the end slave module 1000. TRGT and / or target color temperature T TRGT The emitter control circuit 1036 may determine the respective drive currents I of the emitters 1011, 1012, 1013, 1014 based on the determined target value of the luminous flux to be emitted from the emitters 1011, 1012, 1013, 1014. LED1 -I LED4 When the aging of the end slave module 1000 is zero, the corresponding drive current I of the transmitters 1011, 1012, 1013, 1014 can be LED1 -I LED4 The value of is controlled to be the initial value I LED-初始 .

[0149] When the emitters 1011, 1012, 1013, 1014 age, the light output of the end slave module 1000 (e.g., the maximum light output and / or the light output at a specific current or frequency) may be reduced. The emitter control circuit 1036 may be configured to set the drive current I DR The value of increases to the adjusted value I LED-调整 To achieve the target intensity L TRGT and / or target color temperature T TRGT The determined target value of the luminous flux.

Claims

1. A lighting device, comprising: First lens; a housing defining a cavity; an emitter mounted within the housing, the emitter configured to generate light; a reflector positioned within the cavity, the reflector being configured to reflect the light generated by the emitter toward the first lens; as well as An internal optical structure, the internal optical structure is located between the emitter and the first lens, the internal optical structure comprising: a second lens; and A light shield, the light shield is located between the second lens and the emitter, and the light shield comprises: a first surface configured to reflect light emitted by the emitter; and One or more apertures extending through the light shield, the one or more apertures configured to allow light emitted by the emitter to pass therethrough.

2. The lighting device of claim 1 , wherein the first surface is configured to redirect a first portion of the light emitted by the emitter toward a base of the reflector, and the one or more apertures are configured to allow a second portion of the light emitted by the emitter to pass through the one or more apertures to reach the second lens.

3. The lighting device of claim 2, wherein the redirected first portion of light is reflected by the base of the reflector toward and through the second lens. 4 . The lighting device of claim 3 , wherein the second lens is configured to diffuse the redirected first portion of the light before the light passes through the first lens.

5. The lighting device of claim 1, wherein the first lens is configured to diffuse the light generated by the emitter.

6. The lighting device of claim 1, wherein the second lens is configured to diffuse the second portion of the light before the light passes through the first lens.

7. The lighting device of claim 1, wherein the one or more apertures comprise a slot extending along a longitudinal axis defined by a length of the housing.

8. The lighting device of claim 1, wherein the one or more apertures comprise slots extending substantially perpendicular to a longitudinal axis defined by a length of the housing.

9. The lighting device of claim 1, further comprising a plurality of emitters and a plurality of light shields.

10. The lighting device of claim 9, wherein each of the plurality of light shields is positioned proximate to a corresponding emitter of the plurality of emitters.

11. The lighting device of claim 10, wherein the one or more light shields are evenly spaced along the length of the linear lighting device.

12. The lighting device of claim 1, wherein the light shield is configured to be fastened to the second lens.

13. The lighting device of claim 12, wherein the light shield comprises a pair of clips configured to be received by corresponding holes in the second lens to secure the light shield to the second lens.

14. The lighting device of claim 12, wherein the light shield is secured to the second lens using an adhesive.

15. The lighting device of claim 1, wherein the internal optical structure further comprises the reflector and the emitter.

16. The lighting device of claim 1, wherein the second lens comprises a plurality of tabs configured to be received within apertures in the reflector to secure the internal optical structure within the housing.

17. The lighting device of claim 1, wherein the emitter is an emitter assembly comprising one or more emitters.

18. The lighting device of claim 1, further comprising a printed circuit board received within the cavity of the housing.

19. The lighting device of claim 18, wherein the emitter is mounted to the printed circuit board.

20. The lighting device of claim 18, wherein the emitter is mounted to a substrate, and the substrate is mounted to the printed circuit board.

21. The lighting device of claim 18, further comprising a plurality of printed circuit boards, a plurality of reflectors, and a plurality of internal optical structures, wherein each reflector and each internal optical structure is aligned with a corresponding emitter printed circuit board among the plurality of emitter printed circuit boards.

22. The lighting device of claim 18, wherein the printed circuit board has mounted thereon a control circuit configured to control the transmitter based on receipt of one or more messages.

23. The lighting device of claim 1, wherein the first lens comprises a pair of side walls configured to attach the first lens to the housing.

24. The lighting device of claim 1, wherein the reflector comprises a base and a side wall extending from the base substantially perpendicular to a longitudinal axis of the lighting device.

25. The lighting device of claim 1, wherein the emitter comprises an emitter module including a plurality of light emitting diodes (LEDs) and a plurality of detectors mounted to a substrate and enclosed by a dome-shaped body.

26. A lighting device, comprising: First lens; a housing defining a cavity; an emitter mounted within the housing, the emitter configured to generate light; as well as An internal optical structure, the internal optical structure is located between the emitter and the first lens, the internal optical structure comprising: a second lens; and A light shield, the light shield is located between the second lens and the emitter, and the light shield comprises: a first surface configured to reflect light emitted by the emitter; and One or more apertures extending through the light shield, the one or more apertures configured to allow light emitted by the emitter to pass therethrough.

27. The lighting device of claim 26, wherein the internal optical structure further comprises a reflector positioned within the cavity, the reflector being configured to reflect the light generated by the emitter toward the first lens.

28. A lighting device as described in claim 27, wherein the first surface is configured to reflect a first portion of the light emitted by the emitter toward the base of the reflector, and the one or more apertures are configured to allow a second portion of the light emitted by the emitter to pass through the one or more apertures to reach the second lens.

29. The lighting device of claim 28, wherein the base of the reflector reflects the redirected first portion of light toward and through the second lens.

30. The lighting device of claim 29, wherein the second lens is configured to diffuse the redirected first portion of the light before the light passes through the first lens.

31. The lighting device of claim 26, wherein the first lens is configured to diffuse the light generated by the emitter.

32. The lighting device of claim 26, wherein the second lens is configured to diffuse the second portion of the light before the light passes through the first lens.

33. The lighting device of claim 1, wherein the one or more apertures comprise a slot extending along a longitudinal axis defined by a length of the housing.

34. The lighting device of claim 1, wherein the one or more apertures comprise slots extending substantially perpendicular to a longitudinal axis defined by a length of the housing.

35. The lighting device of claim 1, further comprising a plurality of emitters and a plurality of light shields.

36. The lighting device of claim 35, wherein each of the plurality of light shields is positioned proximate to a corresponding emitter of the plurality of emitters.

37. The lighting device of claim 36, wherein the one or more light shields are evenly spaced along the length of the linear lighting device.

38. The lighting device of claim 1, wherein the light shield is configured to be secured to the second lens.

39. The lighting device of claim 38, wherein the light shield comprises a pair of clips configured to be received by corresponding holes in the second lens to secure the light shield to the second lens.

40. The lighting device of claim 38, wherein the light shield is secured to the second lens using an adhesive.

41. The lighting device of claim 27, wherein said internal optical structure further comprises said reflector and said emitter.

42. The lighting device of claim 27, wherein the second lens comprises a plurality of tabs configured to be received within apertures in the reflector to secure the internal optical structure within the housing.

43. The lighting device of claim 26, wherein the emitter is an emitter assembly comprising one or more emitters.

44. The lighting device of claim 26, further comprising a printed circuit board received within the cavity of the housing.

45. The lighting device of claim 44, wherein the emitter is mounted to the printed circuit board.

46. ​​The lighting device of claim 44, wherein the emitter is mounted to a substrate, and the substrate is mounted to the printed circuit board.

47. The lighting device of claim 44, wherein the printed circuit board has mounted thereon a control circuit configured to control the emitter based on receipt of one or more messages.

48. The lighting device of claim 26, further comprising a plurality of printed circuit boards, a plurality of reflectors, and a plurality of internal optical structures, wherein each reflector and each internal optical structure is aligned with a corresponding emitter printed circuit board among the plurality of emitter printed circuit boards.

49. The lighting device of claim 26, wherein the first lens comprises a pair of side walls configured to attach the first lens to the housing.

50. The lighting device of claim 27, wherein the reflector comprises a base and a side wall, the side wall extending from the base substantially perpendicular to a longitudinal axis defined by the length of the lighting device.

51. A lighting device, comprising: First lens; a housing defining a cavity; an emitter mounted within the housing, the emitter configured to generate light; a reflector positioned within the cavity, the reflector being configured to reflect the light generated by the emitter toward the first lens; as well as An internal optical structure, the internal optical structure is located between the emitter and the first lens, the internal optical structure comprising: a second lens; and A light shield, the light shield is located between the second lens and the emitter, the light shield is configured to: redirecting a first portion of the light emitted by the emitter toward a base of the reflector; and A second portion of the light emitted by the emitter is allowed to pass through the light shield to the second lens.

52. The lighting device of claim 51, wherein the light shield comprises: a first surface configured to redirect the first portion of the light emitted by the emitter; as well as A plurality of apertures are configured to allow the second portion of the light emitted by the emitter to pass therethrough.

53. The lighting device of claim 52, wherein the redirected first portion of light is reflected by the base of the reflector toward and through the second lens.

54. The lighting device of claim 53, wherein the second lens is configured to diffuse the redirected first portion of the light before the light passes through the first lens.

55. The lighting device of claim 51, wherein the first lens is configured to diffuse the light generated by the emitter.

56. The illumination device of claim 51, wherein the second lens is configured to diffuse the second portion of the light before the light passes through the first lens.

57. The lighting device of claim 52, wherein the plurality of apertures comprises slots extending along a longitudinal axis defined by a length of the housing.

58. The lighting device of claim 52, wherein the plurality of apertures comprises slots extending substantially perpendicular to a longitudinal axis defined by a length of the housing.

59. The lighting device of claim 51 further comprising a plurality of emitters and a plurality of light shields.

60. The lighting device of claim 59, wherein each of the plurality of light shields is positioned proximate to a corresponding emitter of the plurality of emitters.

61. The lighting device of claim 60, wherein the one or more light shields are evenly spaced along the length of the linear lighting device.

62. The lighting device of claim 51, wherein the light shield is configured to be secured to the second lens.

63. The lighting device of claim 62, wherein the light shield comprises a pair of clips configured to be received by corresponding holes in the second lens to secure the light shield to the second lens.

64. The lighting device of claim 62, wherein the light shield is secured to the second lens using an adhesive.

65. The lighting device of claim 51, wherein said internal optical structure further comprises said reflector and said emitter.

66. The lighting device of claim 51, wherein the second lens comprises a plurality of tabs configured to be received within apertures in the reflector to secure the internal optical structure within the housing.

67. A lighting device as described in claim 51, wherein the emitter is an emitter assembly including one or more emitters.

68. The lighting device of claim 51 further comprising a printed circuit board received within the cavity of the housing.

69. The lighting device of claim 68, wherein the emitter is mounted to the printed circuit board.

70. The lighting device of claim 68, wherein the emitter is mounted to a substrate, and the substrate is mounted to the printed circuit board.

71. The lighting device of claim 68, further comprising a plurality of printed circuit boards, a plurality of reflectors, and a plurality of internal optical structures, wherein each reflector and each internal optical structure is aligned with a corresponding emitter printed circuit board among the plurality of emitter printed circuit boards.

72. The lighting device of claim 68, wherein the printed circuit board has mounted thereon a control circuit configured to control the emitter based on receipt of one or more messages.

73. The lighting device of claim 51, wherein the first lens comprises a pair of side walls configured to attach the first lens to the housing.

74. The lighting device of claim 51, wherein the reflector comprises a base and a side wall, the side wall extending from the base substantially perpendicular to a longitudinal axis of the lighting device.

75. A lighting device, comprising: First lens; a housing defining a cavity; an emitter assembly mounted within the housing, the emitter assembly comprising one or more emitters configured to generate light; a reflector positioned within the cavity, the reflector configured to reflect the light generated by the one or more emitters toward the first lens; as well as An internal optical structure, the internal optical structure is located between the emitter assembly and the first lens, the internal optical structure comprising: a second lens; and A light shield, the light shield is located between the second lens and the emitter, and the light shield comprises: a first surface configured to reflect light emitted by the emitter; and One or more apertures extending through the light shield, the one or more apertures configured to allow light emitted by the emitter to pass therethrough.

76. A lighting device as described in claim 75, wherein the first surface is configured to redirect a first portion of the light emitted by the one or more emitters toward the base of the reflector, and the one or more apertures are configured to allow a second portion of the light emitted by the one or more emitters to pass through the one or more apertures to reach the second lens.

77. The lighting device of claim 76, wherein the redirected first portion of light is reflected by the base of the reflector toward and through the second lens.

78. The illumination device of claim 77, wherein the second lens is configured to diffuse the redirected first portion of the light before the light passes through the first lens.

79. The lighting device of claim 75, wherein the first lens is configured to diffuse the light generated by the one or more emitters.

80. The illumination device of claim 75, wherein the second lens is configured to diffuse the second portion of the light before the light passes through the first lens.

81. The lighting device of claim 75, wherein the one or more apertures comprise a slot extending along a longitudinal axis defined by a length of the housing.

82. The lighting device of claim 75, wherein the one or more apertures comprise a slot extending substantially perpendicular to a longitudinal axis defined by a length of the housing.

83. The lighting device of claim 75, further comprising a plurality of emitter assemblies and a plurality of light shields.

84. The lighting device of claim 83, wherein each of the plurality of light shields is positioned proximate to a corresponding emitter assembly of the plurality of emitter assemblies.

85. The lighting device of claim 84, wherein the one or more light shields are evenly spaced along the length of the linear lighting device.

86. The lighting device of claim 75, wherein the light shield is configured to be secured to the second lens.

87. The lighting device of claim 86, wherein the light shield comprises a pair of clips configured to be received by corresponding holes in the second lens to secure the light shield to the second lens.

88. The lighting device of claim 86, wherein the light shield is secured to the second lens using an adhesive.

89. The lighting device of claim 75, wherein said internal optical structure further comprises said reflector and said emitter.

90. The lighting device of claim 75, wherein the second lens comprises a plurality of tabs configured to be received within apertures in the reflector to secure the internal optical structure within the housing.

91. The lighting device of claim 75, further comprising a printed circuit board received within the cavity of the housing.

92. The lighting device of claim 91, wherein the emitter is mounted to the printed circuit board.

93. The lighting device of claim 92, wherein the emitter is mounted to a substrate, and the substrate is mounted to the printed circuit board.

94. The lighting device of claim 91, further comprising a plurality of printed circuit boards, a plurality of reflectors, and a plurality of internal optical structures, wherein each reflector and each internal optical structure is aligned with a corresponding emitter printed circuit board among the plurality of emitter printed circuit boards.

95. The lighting device of claim 91, wherein the printed circuit board has mounted thereon a control circuit configured to control the emitter based on receipt of one or more messages.

96. The lighting device of claim 75, wherein the first lens comprises a pair of side walls configured to attach the first lens to the housing.

97. The lighting device of claim 75, wherein the reflector comprises a base and a side wall, the side wall extending from the base substantially perpendicular to a longitudinal axis of the lighting device.

98. A linear lighting device, comprising: First lens; a housing defining a cavity, the housing extending along a longitudinal axis; a plurality of emitters mounted within the housing, each of the plurality of emitters arranged along the longitudinal axis and configured to generate light; as well as an internal optical structure located between the plurality of emitters and the first lens, the internal optical structure extending along the longitudinal axis and comprising: a second lens; and a plurality of light shields located between the second lens and the plurality of emitters, each of the plurality of light shields being aligned with a respective emitter of the plurality of emitters, each of the plurality of light shields comprising: a first surface configured to reflect light emitted by the corresponding one of the plurality of emitters; and One or more apertures passing through each of the plurality of light shields, the one or more apertures being configured to allow light emitted by the corresponding one of the plurality of emitters to pass therethrough.

99. An illumination device as described in claim 98, wherein the internal optical structure further comprises a plurality of reflectors arranged within the cavity along the longitudinal axis, each of the plurality of reflectors being configured to reflect light generated by one or more of the plurality of emitters toward the first lens.

100. An illumination device as described in claim 99, wherein the first surface is configured to reflect a first portion of the light generated by the one or more of the plurality of emitters toward a base of a corresponding reflector of the plurality of reflectors, and the one or more apertures are configured to allow a second portion of the light generated by the one or more of the plurality of emitters to pass through the one or more apertures to reach the second lens.

101. The lighting device of claim 100, wherein the redirected first portion of light is reflected by the base of the corresponding reflector of the plurality of reflectors toward and through the second lens.

102. The lighting device of claim 101, wherein the second lens is configured to diffuse the redirected first portion of the light before the light passes through the first lens.

103. The lighting device of claim 98, wherein the first lens is configured to diffuse the light generated by the plurality of emitters.

104. The illumination device of claim 98, wherein the second lens is configured to diffuse the second portion of the light before the light passes through the first lens.

105. The lighting device of claim 98, wherein the one or more apertures comprise a slot extending along the longitudinal axis defined by the housing.

106. The lighting device of claim 98, wherein the one or more apertures comprise a slot extending substantially perpendicular to the longitudinal axis defined by the housing.

107. The lighting device of claim 98, wherein each of the plurality of light shields is positioned proximate to a corresponding emitter of the plurality of emitters.

108. The lighting device of claim 98, wherein the plurality of light shields are evenly spaced along the length of the linear lighting device.

109. The lighting device of claim 98, wherein each of the plurality of light shields is configured to be secured to the second lens.

110. The lighting device of claim 109, wherein each of the plurality of light shields comprises a pair of clips configured to be received by corresponding holes in the second lens to secure the corresponding light shield of the plurality of light shields to the second lens.

111. The lighting device of claim 109, wherein each of the plurality of light shields is secured to the second lens using an adhesive.

112. The lighting device of claim 99, wherein the internal optical structure further comprises the plurality of reflectors and the plurality of emitters.

113. The lighting device of claim 98, wherein the second lens comprises a plurality of tabs configured to be received within apertures in the plurality of reflectors to secure the internal optical structure within the housing.

114. A lighting device as described in claim 98, wherein each of the plurality of emitters is an emitter assembly comprising one or more emitters.

115. The lighting device of claim 98, further comprising a plurality of printed circuit boards received within the cavity of the housing.

116. The lighting device of claim 115, wherein one or more of the plurality of emitters are mounted to each of the plurality of printed circuit boards.

117. The lighting device of claim 115, wherein each of the plurality of emitters is mounted to a respective substrate, the respective substrate being mounted to a respective printed circuit board of the plurality of printed circuit boards.

118. The lighting device of claim 115, wherein each of the printed circuit boards has mounted thereon a control circuit configured to control the plurality of emitters based on receipt of one or more messages.

119. The lighting device of claim 98, wherein the first lens comprises a pair of side walls configured to attach the first lens to the housing.

120. The lighting device of claim 99, wherein each of the plurality of reflectors comprises a base and a side wall extending from the base substantially perpendicular to the longitudinal axis defined by the housing.

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