Track lighting system
By introducing pivotable lighting devices and angle-sensitive controllers into the track lighting system, the light distribution and glare issues of existing systems in non-retail applications are resolved, enabling flexible adjustment of luminous flux and direction to meet the lighting needs of scenarios such as homes and offices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SIGNIFY HOLDING BV
- Filing Date
- 2024-09-19
- Publication Date
- 2026-04-21
AI Technical Summary
Existing track lighting systems struggle to meet the diverse lighting requirements of applications beyond retail, such as residential and office settings, particularly in terms of light distribution and glare control.
A track lighting system is provided, including an electric track, lighting equipment, support components, and a controller. The lighting equipment is pivotable through a hinge component. The controller controls the luminous flux of the LED light source according to the tilt angle. Combined with tilt angle and rotation angle sensitive devices, the light distribution is adjusted to prevent glare.
It enables flexible adjustment of lighting equipment at different angles and luminous flux, reduces glare, and adapts to the lighting needs of various application scenarios.
Smart Images
Figure CN121909356A_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to lighting equipment. In particular, this disclosure relates to a track lighting system. Background Technology
[0002] A growing trend in the lighting industry is track lighting, where lighting fixtures such as spotlights are mounted on and mechanically and electrically connected to an electric track. Track lighting systems typically allow for variable positioning of the lighting fixtures along the track. Traditionally, track lighting systems have been used in retail settings. However, recently, track lighting products have been developed for applications beyond retail, such as residential and office settings. Summary of the Invention
[0003] A more versatile track lighting system is needed to meet the diverse lighting requirements of new application areas.
[0004] This and other objectives are achieved by providing a track lighting system as defined in the independent claims. Preferred embodiments are defined in the dependent claims.
[0005] Therefore, this disclosure provides a track lighting system. The track lighting system includes an electric track and lighting equipment. The lighting equipment includes a body, a support, and a controller. The body includes a first LED light source. A first end face of the body includes a first light emission window for transmitting first light emitted by the first LED light source along a first principal optical axis. The body also includes a second LED light source and a first side face. The first side face extends from the first end face to a second end face. The second end face is opposite to the first end face. The first side face includes a second light emission window for transmitting second light emitted by the second LED light source. The support includes a connector configured to electrically and mechanically connect the lighting equipment to the electric track. The support includes a hinge member connected to the body. The body is pivotable relative to the support. The tilt angle of the body is defined by a first axis orthogonal to a plane extending therein of the electric track and the principal optical axis. The controller is configured to control a first luminous flux of the first light emitted by the first LED light source and a second luminous flux of the second light emitted by the second LED light source according to the tilt angle.
[0006] The electrical tracks of a track lighting system can be configured to be laid in or on a surface such as a ceiling or wall. The plane in which the electrical tracks extend can coincide with such a surface.
[0007] The first light exit window is arranged to typically transmit the first light along the principal optical axis. The second light exit window can be arranged to typically transmit the second light along the second optical axis. The second optical axis can intersect the principal optical axis at an angle between 80 degrees and 100 degrees. For example, the second optical axis can be perpendicular to the principal optical axis.
[0008] Connectors allow for variable positioning of lighting equipment relative to power rails.
[0009] For example, a hinge member can be implemented as a hinge, joint, pivot, flexible joint, bending element, etc. The hinge member can provide that the body is pivotable or tiltable about the hinge member. The body can be pivotable / tiltable relative to the electric rail or a plane in which the electric rail extends. The hinge member can have a (first) axis of rotation about which the body can pivot (or tilt). The axis of rotation of the hinge member can be parallel to the plane in which the electric rail extends.
[0010] The hinge member can be attached to (or attached to) a surface of the body. For example, the hinge member can be attached to a second end face, a first side face, or a second side face extending from the first end face to the second end face on a second side face opposite to the first side face. Furthermore, the hinge member can be attached to a corner of the body, such as the corner between the first side face and the second end face.
[0011] The tilt angle is defined relative to the first axis. The first axis is orthogonal to or perpendicular to the plane in which the electric track extends. At a zero-degree tilt angle, the principal optical axis is parallel to the first axis. Therefore, when arranged at a zero-degree tilt angle, the lighting device is positioned to emit light (vertically) away from the plane in which the electric track extends.
[0012] The tilt angle can be defined such that for positive values of the tilt angle, the second light exit window is guided away from the plane in which the electric track extends, and for negative values of the tilt angle, the second light exit window is guided toward the plane in which the electric track extends.
[0013] The controller is configured to control the first luminous flux of the first light (i.e., the light emitted by the first LED light source) based on the tilt angle. The controller is also configured to control the second luminous flux of the second light (i.e., the light emitted by the second LED light source) based on the tilt angle. Therefore, the first and / or second luminous flux can be adjusted, for example, by a user of the track lighting system changing the tilt angle.
[0014] According to some embodiments, the controller can be configured to change a first ratio (Rat1) of the first luminous flux (LF1) to the second luminous flux (LF2) according to the tilt angle, where Rat1 = LF1 / LF2.
[0015] Therefore, the relationship (ratio) between the first and second beams can be adjusted by changing the tilt angle.
[0016] As mentioned, the support includes a connector configured to electrically and mechanically connect the lighting equipment to the power rail. The power rail may be an elongated power rail with an extension axis, wherein the lighting equipment can be movable along the extension axis of the elongated power rail to allow variable positioning of the lighting equipment relative to the power rail.
[0017] According to some embodiments, the controller can be configured to change a first ratio based on the tilt angle, such that the first ratio decreases as the tilt angle increases.
[0018] According to some embodiments, the controller can be configured to control the first LED light source to emit light at 20% or less of the first maximum luminous flux of the first LED light source in response to a tilt angle higher than a first threshold.
[0019] For example, the controller can be configured to control the first LED light source to emit light at 10% or less of the first maximum luminous flux in response to a tilt angle higher than a first threshold.
[0020] The controller can be configured, for example, to turn off the first LED light source in response to a tilt angle exceeding a first threshold.
[0021] At a 90-degree tilt angle, the principal optical axis is parallel to the plane in which the electric track extends. Within the range of 0 to 90 degrees, the larger the tilt angle, the more the principal optical axis is guided away from the first axis (which is perpendicular to the plane in which the electric track extends). By reducing the luminous flux and then tilting the angle above a first threshold, unwanted glare from the first light exit window can be prevented.
[0022] According to some embodiments, the first threshold can be in the range of 40 degrees to 70 degrees. More specifically, the first threshold can be in the range of 45 degrees to 65 degrees.
[0023] Additionally or alternatively, the controller may be configured to control the second LED light source to emit light at 40% or less of the second maximum luminous flux of the second LED light source in response to a tilt angle below a second threshold.
[0024] For example, the controller can be configured to control the second LED light source to emit light at 20% or less of the second maximum luminous flux in response to a tilt angle below a second threshold.
[0025] More specifically, the controller can be configured to control the second LED light source to emit light at 10% or less of the second maximum luminous flux in response to a tilt angle below a second threshold.
[0026] The controller can be configured, for example, to turn off the second LED light source in response to a tilt angle falling below a second threshold.
[0027] Undesirable glare from the second light exit window can be prevented by reducing the second light flux below the second threshold.
[0028] According to some embodiments, the second threshold can be in the range of 0 degrees to 35 degrees. For example, the second threshold can be in the range of 2 degrees to 25 degrees.
[0029] At a 90-degree angle, the second light exit window can be arranged to emit (or transmit) the second light generally in the direction of the first axis. At a zero-degree angle, the second light exit window can be arranged to emit the second light substantially parallel to the plane in which the electric rail extends. At a -90-degree angle, the second light exit window can be arranged to emit light generally toward the plane in which the electric rail extends.
[0030] According to some embodiments, the first threshold may be higher than the second threshold.
[0031] According to some embodiments, the controller may also be configured to turn off the first LED light source and the second LED light source in response to a tilt angle lower than the off tilt angle.
[0032] Closing the tilt angle can define the position in which the second light exit window is substantially parallel to and points toward the plane in which the electric track extends. For example, the closing tilt angle can be -80 degrees or lower, such as -85 degrees or lower, -88 degrees or lower, or -90 degrees.
[0033] The controller can also be configured to turn off the first LED light source in response to a tilt angle higher than a second shut-off tilt angle. For example, the second shut-off tilt angle could be 80 degrees or higher. The second shut-off tilt angle could be 85 degrees or higher, such as 88 degrees or higher, or 90 degrees.
[0034] According to some embodiments, the track lighting system may also include a tilt angle sensitive device. The tilt angle sensitive device (or means for determining the tilt angle) can provide an output signal that depends on the tilt angle. The tilt angle sensitive device can communicate with a controller.
[0035] The controller can also be configured to obtain the tilt angle (parameter) based on the output from the tilt angle-sensitive device. For example, the controller can be configured to receive the tilt angle from the tilt angle-sensitive device. Additionally or alternatively, the controller can be configured to determine or calculate the tilt angle based on the output of the tilt angle-sensitive device.
[0036] For example, the tilt angle sensitive device may be a tilt angle sensitive sensor, such as a tilt sensor and orientation sensor, or an accelerometer. Alternatively, the tilt angle sensitive device may include other means for determining the tilt angle. For example, the tilt angle sensitive device may include means for determining the position of a first portion of the hinge element connected to the support relative to a second portion of the hinge element connected to the body.
[0037] According to some embodiments, the support may also include a rotating element having a rotation axis orthogonal to the plane in which the power rail extends, such that the body is rotatable about the rotation axis.
[0038] According to some embodiments, the controller may also be configured to control the first luminous flux and the second luminous flux based on the rotation angle of the lighting device about the rotation axis.
[0039] Track lighting systems may also include rotation angle-sensitive devices. The rotation angle-sensitive device (or a device for determining the rotation angle) can provide an output signal that depends on the rotation angle. The rotation angle-sensitive device can communicate with the controller.
[0040] The controller can obtain the rotation angle based on the output from the rotation angle-sensitive device. For example, the controller can be configured to receive the rotation angle from the tilt angle-sensitive device. Additionally or alternatively, the controller can be configured to determine or calculate the rotation angle based on the output of the rotation angle-sensitive device.
[0041] According to some embodiments, the first LED light source may include at least one LED and a collimator. The collimator may be configured to collimate the first light. The first light emitted by the lighting device may have a first full width at half maximum (FWHM1).
[0042] The second light emission window may include a diffuser element configured to diffuse the second light. The second light emitted by the lighting device may have a second full width at half maximum (FWHM2).
[0043] The second half-height full width (FWHM2) can be larger than the first half-height full width (FWHM1), i.e., FWHM2 > FWHM1.
[0044] For example, FWHM1 can be less than or equal to 45 degrees. More specifically, FWHM1 can be less than or equal to 25 degrees, such as less than or equal to 15 degrees, or less than or equal to 7 degrees.
[0045] For example, FWHM2 can be greater than or equal to 70 degrees. More specifically, FWHM2 can be greater than or equal to 80 degrees, such as greater than or equal to 90 degrees, or greater than or equal to 100 degrees.
[0046] The lighting equipment can provide collimated, direct first light along the principal optical axis from the first light exit window. The lighting equipment can also provide diffused, indirect second light from the second light exit window. The direction and intensity of the first (direct) light and the second (diffuse) light can be adjusted by changing the tilt angle.
[0047] According to some embodiments, the second LED light source may include at least one LED and a light guide arranged to receive light from the at least one LED.
[0048] In an embodiment, the second light exit window may be at least partially included in the light guide.
[0049] According to some embodiments, the first light-emitting window may have a first surface area. The second light-emitting window may have a second surface area. The second surface area may be at least two or three times larger than the first surface area. Alternatively or additionally, the first maximum brightness of the first light-emitting window may be at least two or three times higher than the second maximum brightness of the second light-emitting window.
[0050] The first side can extend from the first end face and / or the second end face at an angle of 80 to 100 degrees. The first side can extend perpendicularly from the first end face and / or the second end face.
[0051] According to some embodiments, the main body of the lighting device may have a rectangular cube shape.
[0052] For example, a main body can have a length (L), a width (W), and a height (H). The length (L) can be greater than or equal to twice the width, i.e., L≥2W, or the length (L) can be greater than or equal to three times the width (W), i.e., L≥3W. The length (L) can be greater than or equal to twice the height, i.e., L≥2H, or the length (L) can be greater than or equal to three times the height (H), i.e., L≥3H.
[0053] In this embodiment, the track may have a track length (TL) and a track width (TW). The track length (TL) may be greater than or equal to 10 times the track width (TW), i.e., TL ≥ 10TW. The ratio of the body width (W) to the track width (TW) may be in the range of 0.5 to 1.5, i.e., 0.5 < W / TW < 1.5. Specifically, the ratio of the body width (W) to the track width (TW) may be in the range of 0.8 to 1.2, i.e., 0.8 < W / TW < 1.2.
[0054] According to some embodiments, the body of the lighting device may have a second side opposite to the first side. The second side may be non-luminous. In such embodiments, the second side does not include a light-emitting window or at least does not emit light.
[0055] According to some embodiments, the lighting device may be a first lighting device, and the system may also include a second lighting device. The second lighting device may be electrically and mechanically connectable to the first lighting device, such that the first and second lighting devices can be controlled as a single lighting device. The second lighting device may have the same architecture as the first lighting device. Alternatively, the second lighting device may have a different architecture than the first lighting device.
[0056] The first and second lighting devices can be configured to provide the appearance of a single lighting device in an electrically and mechanically connected state.
[0057] For example, the first light-emitting window of the lighting device can extend to the edge of the first end face of the body. In the mechanical connection state between the (first) lighting device and another (second) lighting device, the first light-emitting window of the respective lighting device can be arranged at a sufficiently short distance to provide the appearance of a single light-emitting window.
[0058] Similarly, the second light-emitting window of the lighting device can extend to the edge of the first side of the main body. In the mechanically connected state between the first and second lighting devices, the second light-emitting window of the respective lighting device can be arranged at a sufficiently short distance to provide the appearance of a single light-emitting window.
[0059] In the electrically connected state, the controllers of the first and second lighting devices can control the corresponding first LED light source as a single LED light source. Similarly, the controllers of the first and second lighting devices can control the corresponding second LED light source as a single LED light source.
[0060] Any embodiment described herein may be combined with other embodiments also described herein, and this disclosure relates to all combinations of features.
[0061] In the example, the controller can be tuned at a first tilt position that characterizes a first tilt angle, where the body is orthogonal to the plane in which the power rail extends, and the first tilt angle is zero (i.e., a predefined reference tilt angle is zero when the body is orthogonal to the plane in which the power rail extends).
[0062] According to some embodiments, the first LED light source and the second LED light source may be different. More specifically, in embodiments, the first LED light source may include a first plurality of light-emitting diodes (LEDs), and the second LED light source may include a second plurality of light-emitting diodes (LEDs), wherein the first plurality of light-emitting diodes are different from the second plurality of light-emitting diodes. For example, the first plurality of light-emitting diodes may include a first luminescent material arranged to establish a first color temperature (e.g., warm white, e.g., via warm white LEDs), and the second plurality of light-emitting diodes may include a second luminescent material arranged to establish a second color temperature (e.g., cool white, e.g., via cool white LEDs), wherein the first color temperature is different from the second color temperature. For example, the first plurality of light-emitting diodes may consist of a first number of LEDs, and the second plurality of light-emitting diodes may consist of a second number of LEDs, wherein the first number and the second number are different. For example, the second number is at least twice the size of the first number, preferably at least four times the size of the first number. For example, the first plurality of light-emitting diodes may include a first type, and the second plurality of light-emitting diodes may include a second type, which is different from the first plurality of light-emitting diodes. For example, the first plurality of light-emitting diodes may be conventional LEDs, while the second plurality of light-emitting diodes may be LED filaments.
[0063] In various respects, the present invention also provides an improved track lighting device that at least mitigates the aforementioned problems and disadvantages. Therefore, the present invention provides a track lighting device comprising a body, a support, and a controller; wherein the body includes a first LED light source and a first end face, the first end face including a first light emission window for transmitting first light emitted by the first LED light source along a main optical axis (OA1); wherein the body includes a second LED light source and a first side face extending from the first end face to a second end face opposite to the first end face, wherein the first side face includes a second light emission window for transmitting second light emitted by the second LED light source; wherein the support includes a connector configured to electrically and mechanically connect the track lighting device to a power rail of a track lighting system; wherein the support includes a hinge member connected to the body such that the body is pivotable relative to the support, wherein the tilt angle (θ) of the body is defined by a first axis (A1) and the main optical axis, the first axis (A1) being orthogonal to a plane in which the power rail of the track lighting system extends; wherein the controller is configured to control a first luminous flux of the first light (L1) emitted by the first LED light source and a second luminous flux of the second light (L2) emitted by the second LED light source according to the tilt angle (θ). The embodiments and advantages associated with the track lighting system according to the invention, with necessary modifications, are applicable to the track lighting device according to the invention. Attached Figure Description
[0064] Exemplary embodiments will now be described in more detail with reference to the following figures: Figure 1 This is a schematic diagram of a track lighting system according to some embodiments; Figure 2 This is a side view illustration of a track lighting system according to some embodiments; Figure 3 This is a bottom view illustration of a track lighting system according to some embodiments; and Figure 4 This is an illustration of a track lighting system according to some embodiments.
[0065] As shown in the figures, for illustrative purposes, the dimensions of elements and areas may be exaggerated; therefore, they are provided to illustrate the general structure of the embodiments. The same reference numerals always refer to the same elements. Detailed Implementation
[0066] Exemplary embodiments will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.
[0067] refer to Figure 1 and Figure 2 The following describes a track lighting system 100 according to some embodiments. Figure 1 A perspective view of the track lighting system 100 is provided, and Figure 2 A side view of the track lighting system 100 is provided.
[0068] The track lighting system 100 includes an electric track 110, which in Figure 1 The track lighting system 100 is arranged in the ceiling 150. The track lighting system 100 also includes a lighting fixture 120.
[0069] The lighting device 120 has a body 126, which is supported in a power rail 110 by a support member 122. The support member 122 includes a connector 148 that mechanically and electrically connects the body 126 to the power rail 110.
[0070] In the illustrated embodiment, the main body 126 of the lighting device 120 has a rectangular cube shape, having a first end face 132, a second (opposite) end face 130, a first side face 134 extending between the first and second end faces 132 and 130, and a second side face 136 opposite to the first side face 134.
[0071] The first end face 132 includes a first light exit window 140, which is configured to transmit first light L1 emitted by the first LED light source 144 along the main optical axis OA1. Figure 2(As shown in the diagram). The first LED light source 144 may include at least one light-emitting diode (LED) and a collimator configured to collimate the first light.
[0072] The first side surface 134 includes a second light emission window 138 configured to transmit a second light L2 emitted by a second LED light source 146. The second light L2 can be emitted along a second optical axis OA2. The second light emission window 138 may include a diffuser element configured to diffuse the second light L2.
[0073] In the example shown, the second side 136 does not emit light.
[0074] The support member 122 also includes a hinge member 124 connected to the body 126. Specifically, the hinge member 124 is connected to a second end face 130. The hinge member may have a rotation axis RA1. The body 126 may pivot about the hinge member 124, for example, about the rotation axis RA1, relative to the track 110 and the ceiling 150. Specifically, the body 126 may tilt about a first axis A1 perpendicular to a plane in which the power track 110 extends. In the illustrated embodiment, this plane corresponds to the ceiling 150. A tilt angle θ is defined between the main optical axis OA1 and the first axis A1.
[0075] The track lighting system 100 also includes a controller 128. The controller 128 is configured to control a first LED light source 144 and a second LED light source 146. Specifically, the controller 128 is configured to control the first luminous flux of the first light source L1 and the second luminous flux L2 of the second light source L2 according to a tilt angle θ. For example, the controller 128 can control the ratio of the first luminous flux to the second luminous flux according to the tilt angle θ. Therefore, the direction and intensity of the first light source L1 and the second light source L2 can be adjusted by changing the tilt angle θ.
[0076] The track lighting system 100 may also include a tilt angle sensing device 142. The tilt angle sensing device 142 may provide an output signal indicating the tilt angle θ. The controller 128 may obtain, receive, or determine the tilt angle θ based on the output of the tilt angle sensing device 142.
[0077] For further reference Figure 3 Further aspects of a track lighting system according to some embodiments will be described. Figure 3 A bottom view of the track lighting system 100 is provided.
[0078] In the example shown, support 122 also includes a rotating element 152. The rotating element 152 allows the body 126 to rotate around a second axis of rotation RA2 (in... Figure 2(As shown in the diagram) Rotation. The second rotation axis RA2 can be parallel to or coincide with the first axis A1. In embodiments including the rotation element 152, the attitude of the body 126 can have two degrees of freedom: pitch and roll as seen from the angle of the first light exit window 140, or pitch and yaw as seen from the angle of the second light exit window 138. The support 122 can provide a variable position of the lighting device 120 relative to the power rail 110, thereby providing an additional (translational) degree of freedom.
[0079] like Figure 3 As shown, a rotation angle γ can be defined to describe the rotation of the main body 126. Figure 3 In this configuration, the rotation angle γ is defined by a second axis A2 and a third axis A3. The second axis A2 is at least partially parallel to the track 110. The third axis A3 is defined relative to the body 126. In this example, the third axis A3 extends along the centerline of the body 126, parallel to the first and second sides 134, 136, and parallel to the ceiling 150.
[0080] The controller 128 can also be configured to control the first and second luminous flux based on the rotation angle γ. The track lighting system 100 may also include a rotation angle sensitive device (not shown). The rotation angle sensitive device can provide an output indicating the rotation angle γ to the controller 128.
[0081] refer to Figure 4 The following describes a track lighting system 200 according to some embodiments.
[0082] Similar to the track lighting system 100 described above with reference to the preceding figures, Figure 4 The track lighting system 200 includes an electrical track 110 arranged in the ceiling 150 and a (first) lighting device 120. The track lighting system 200 also includes a second lighting device 220. The second lighting device 220 may be equivalent to the (first) lighting device 120 described with reference to the preceding figures.
[0083] The first lighting device 120 and the second lighting device 220 can be electrically and mechanically interconnected. That is, the second lighting device 220 can be configured to be electrically and mechanically connected to the first lighting device 120, and vice versa.
[0084] The first lighting device 120 and the second lighting device 220 can be controlled as a single lighting device. The controller 128 (or first controller 128) of the first lighting device 120 can communicate with the (second) controller 228 of the second lighting device 220. The first and second controllers 128, 228 can similarly control the luminous flux of their respective first and second LED light sources to give the appearance of a single lighting device.
[0085] exist Figure 4 In the first and second lighting devices 120 and 220, the first light-emitting windows 140 and 240 each extend to the edges of their respective first end faces 132 and 232. Specifically, the first light-emitting windows 140 and 240 each extend at least to the edge E1 where the first end faces 132 and 232 meet. Therefore, the first light-emitting windows 140 and 240 can provide the appearance of forming a single first light-emitting window.
[0086] Similarly, the second light exit windows 138 and 238 of the first and second lighting devices 120 and 220 each extend to the edge E1 of the respective first side 134 and 234 where they meet. Thus, the second light exit windows 138 and 238 can provide the appearance of forming a single second light exit window.
[0087] Those skilled in the art will recognize that the invention is by no means limited to the preferred embodiments described above. Rather, many modifications and variations are possible within the scope of the appended claims.
[0088] Although the features and elements are described above in specific combinations, each feature or element can be used alone without other features and elements, or in various combinations with or without other features and elements.
[0089] Additionally, by studying the accompanying drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement variations of the disclosed embodiments in practicing the claimed invention. In the claims, the word "comprising" does not exclude other elements, and the indefinite articles "a" or "an" do not exclude a plurality. The mere fact that certain features are recited in mutually different dependent claims does not imply that combinations of these features cannot be used advantageously.
Claims
1. A track lighting system (100) comprising an electric track (110) and lighting equipment (120), wherein: The lighting device includes a main body (126), a support (122), and a controller (128). The main body includes a first LED light source (144) and a first end face (132), the first end face (132) including a first light exit window (140) for transmitting the first light emitted by the first LED light source along the main optical axis (OA1). The main body includes a second LED light source (146) and a first side surface (134) extending from the first end face to a second end face (130) opposite to the first end face, wherein the first side surface includes a second light exit window (140) for transmitting second light emitted by the second LED light source. The support includes a connector (148) configured to electrically and mechanically connect the lighting device to the power rail; The support includes a hinge member (124) connected to the body such that the body is pivotable relative to the support, wherein the tilt angle (θ) of the body is defined by a first axis (A1) and the main optical axis, the first axis being orthogonal to the plane in which the electric track extends; The controller is configured to control the first luminous flux of the first light (L1) emitted by the first LED light source and the second luminous flux of the second light (L2) emitted by the second LED light source according to the tilt angle (θ).
2. The track lighting system according to claim 1, wherein, The controller is configured to change a first ratio Rat1 of the first luminous flux LF1 and the second luminous flux LF2 according to the tilt angle, wherein Rat1 = LF1 / LF2.
3. The track lighting system according to claim 2, wherein, The controller is configured to change the first ratio according to the tilt angle, such that the first ratio decreases as the tilt angle increases.
4. The track lighting system according to any one of the preceding claims, wherein, The controller is configured to: In response to the tilt angle being higher than a first threshold, the first LED light source is controlled to emit light at 20% or less of the first maximum luminous flux of the first LED light source; and / or In response to the tilt angle being lower than a second threshold, the second LED light source is controlled to emit light at 40% or less of the second maximum luminous flux of the second LED light source.
5. The track lighting system according to claim 4, wherein, The first threshold is higher than the second threshold.
6. The track lighting system according to any one of claims 4 or 5, wherein, The first threshold is in the range of 40 degrees to 70 degrees.
7. The track lighting system according to any one of the preceding claims further includes a tilt angle sensitive device (140); wherein The controller is also configured to obtain the tilt angle based on the output from the tilt angle sensitive device.
8. The track lighting system according to any one of the preceding claims, wherein, The support also includes a rotating element (152) having a rotation axis (RA2) orthogonal to the plane in which the power rail extends, such that the body is rotatable about the rotation axis.
9. The track lighting system according to claim 8, wherein, The controller is also configured to control the first luminous flux and the second luminous flux based on the rotation angle (γ) of the lighting device about the rotation axis.
10. The track lighting system according to any one of the preceding claims, wherein: The first LED light source includes at least one LED and a collimator configured to collimate the first light, wherein the first light emitted by the lighting device has a first full width at half maximum (FWHM1). The second light exit window includes a diffuser element configured to diffuse the second light, wherein the second light emitted by the illumination device has a second full width at half maximum (FWHM2), and Where FWHM2 > FWHM1.
11. The track lighting system according to any one of the preceding claims, wherein, The second LED light source includes at least one LED and a light guide arranged to receive light from the at least one LED.
12. The track lighting system according to any one of the preceding claims, wherein, The first light-emitting window has a first surface area, and the second light-emitting window has a second surface area; and At least one of the following applies: (i) The second surface area is at least twice the size of the first surface area; (ii) The first maximum brightness of the first light-emitting window is at least twice as high as the second maximum brightness of the second light-emitting window.
13. The track lighting system according to any one of the preceding claims, wherein, The main body of the lighting device has a rectangular cube shape.
14. The track lighting system according to any one of the preceding claims, wherein, The main body of the lighting device has a second side (136) opposite to the first side, and wherein the second side does not emit light.
15. The track lighting system according to any one of the preceding claims, wherein: The lighting device (120) is the first lighting device; and The system also includes a second lighting device (220) that is electrically and mechanically connected to the first lighting device, such that the first and second lighting devices are controllable as a single lighting device.