Method and controller for controlling a group of lighting units - Patents.com

Abstract

A method for controlling a first lighting unit of a group of lighting units is disclosed, the method including receiving a first signal communicated between a portable device and the first lighting unit, determining a first signal strength of the received first signal, and if the first signal strength exceeds a threshold, setting the portable device to a first control mode in which only the first lighting unit of the group of lighting units is controlled by the portable device, and if the first signal strength does not exceed the threshold, setting the portable device to a second control mode in which the lighting units of the group are controlled by the portable device.

Description

[Technical field]

[0001] The present invention relates to a method for controlling a first lighting unit of a group of lighting units. The present invention further relates to a computer program product for carrying out said method. The present invention further relates to a controller for controlling a first lighting unit of a group of lighting units, and to a portable device comprising said controller. [Background technology]

[0002] Current smart lighting systems allow users to control lighting units through various types of control interfaces. One of these control interfaces is a software application running on a smartphone, PC, tablet, etc., which provides the user with a rich user interface with multiple options for lighting control. Another type of control interface uses an accessory device, such as a light switch. Such a light switch provides more limited lighting control options. For example, a light switch may include a limited number of buttons or other user input elements.

[0003] The number of connected lighting units in a home, and even in a room, is increasing, making it more cumbersome for users to manually control individual lighting units. User interfaces (e.g., rendered on the display of a portable device) can become complex and cluttered when all controllable devices are presented.

[0004] US 2016 / 0150624 A1 discloses a lighting system for controlling a lighting device by a control device. The lighting system includes a lighting device and a control device including a first user interface configured to receive a first user input. The lighting system further includes a proximity detector configured to detect a proximity between the control device and the lighting device. In one embodiment, the processor may adjust a control parameter of the lighting device only if the control device is within a predefined proximity of the lighting device. Furthermore, the user interface may be configured to receive a further user input for adjusting a range of proximity within which the control device may control the lighting device.

[0005] US 2016 / 0021716 A1 discloses controlling lighting control according to at least one of received signal strength (RSSI) and predefined lighting modes. The brightness and / or color temperature of the lighting device can be automatically controlled at multiple levels according to the RSSI and user preferences. Summary of the Invention [Problem to be solved by the invention]

[0006] The inventors have realised that due to a large number of controllable lighting units in a lighting system, the user interface for controlling these lighting units becomes more complex. Furthermore, the inventors have realised that lighting control can be simplified by adapting the user interface or control functions based on the most likely control needs of a user. It is therefore an object of the present invention to provide a lighting system which simplifies the control of lighting units. [Means for solving the problem]

[0007] According to a first aspect of the invention, the object is to provide a method for controlling a group of lighting units, the method comprising the steps of: - receiving a first signal communicated between the portable device and a first lighting unit of a group of lighting units; - determining a first signal strength of a received first signal; - if the first signal strength exceeds a threshold, setting the portable device to a first control mode in which only a first lighting unit of the group of lighting units is controlled by the portable device; - if the first signal strength does not exceed a threshold, setting the portable device to a second control mode in which the lighting units of the group are controlled by the portable device; This is achieved by a method comprising:

[0008] The first signal is a signal communicated between the portable device and the first lighting unit. The first signal may be communicated from the portable device to the lighting unit or vice versa. Furthermore, the method may include the step of determining whether the first signal strength exceeds a threshold. If the first signal strength exceeds the threshold, the portable device is set to a first (individual) control mode in which only a first lighting unit of a group of lighting units is controlled by the portable device. The signal strength of the received first signal may indicate a distance between the portable device and the lighting unit. Thus, the portable device is set to the first control mode if it is located within a threshold range. If the signal strength does not exceed the threshold (and the portable device is outside the threshold range), the portable device is set to a second (group) control mode in which the lighting units of the group are controlled by the portable device. The group of lighting units may be, for example, a group of lighting units located in a space, such as a room. In other words, the portable device automatically switches between a (single) lighting unit control mode and a group control mode based on the signal strength of the signal communicated between the lighting unit and the portable device. This simplifies the control of lighting units for a user, since for example the user can bring the portable device in (close) proximity to a lighting unit in order to control it.

[0009] Further, the method comprises: - receiving user input via a portable device indicating a lighting control setting; - when the portable device is set to a first control mode, controlling a first lighting unit according to a lighting control setting; - when the portable device is set to a second control mode, controlling the group of lighting units according to the lighting control settings; Thus, if a user positions the portable device within a threshold range of a first lighting unit, the user can only control the first lighting unit with the portable device (and not other lighting units outside the threshold range). If a user positions the portable device outside the threshold range of the first lighting unit, the user can control all lighting units of the group (e.g. all lighting units located in a space) with the portable device. This simplifies the control of lighting units for the user, since the user can bring the portable device (in) close proximity to a lighting unit in order to control it.

[0010] Further, the method may include indicating, via a user interface, a current control mode of the portable device. A user interface of the portable device (e.g., a display, an indicator LED, an auditory user interface, a tactile user interface, etc.) may be controlled to indicate which current control mode (i.e., the first control mode or the second control mode) is active. This is beneficial as it improves the usability of the lighting control by informing the user that the portable device is set to the first control mode in which the first lighting unit is controlled.

[0011] The portable device may include a display for rendering the user interface. Further, the method includes: - when the portable device is set to the first control mode, rendering a first user interface on the display, the first user interface being configured to receive user input for controlling the first lighting unit; - when the portable device is set to a second control mode, rendering a second user interface on the display, the second user interface being configured to receive user input for controlling a group of lighting units; In other words, the user interface is adapted based on the active control mode. The portable device may be a personal device, for example a smartphone, a tablet PC, smart glasses, etc. This is beneficial as it further simplifies the control of the lighting unit for the user.

[0012] Alternatively, the portable device may be a light switch and user input may be received via a button on the light switch. A user may press / touch / rotate the button on the light switch to control the light (e.g., turn the light on, turn the light off, cycle through a light scene, etc.). The light switch may include multiple buttons for receiving user inputs related to different lighting control commands. If a user positions the light switch within a threshold range of a first lighting unit, the user may control the first lighting unit by pressing / touching the button. If a user positions the light switch outside the threshold range of the first lighting unit, the user may control all lighting units of a group (e.g., all lighting units located in a space) by pressing / touching the button. This is beneficial as it allows for advanced yet simplified control functionality on the light switch.

[0013] The portable device may include an attachment means for attaching the portable device to a docking object configured to receive the portable device. - detecting whether the portable device is attached to a docking object; - setting the portable device to a second control mode when the portable device is attached to the docking object; The docking object (e.g., docking station, wall plate, etc.) may include means for receiving a portable device (e.g., a smartphone, a home remote control device, a light switch, etc.). The portable device may include means for detecting whether it is attached to the docking object. Additionally or alternatively, the docking object may include means for detecting whether the portable device is attached to the docking object, and the docking object may communicate a signal to the portable device indicating this. The portable device may be set to a second control mode when attached to the docking object (potentially overruling the first control mode if the signal strength exceeds a threshold). This is beneficial as it improves the usability of the lighting control by automatically switching to group control mode when a user attaches a light switch to the docking object.

[0014] Further, the light switch may include one or more indicators for indicating a current control mode of the light switch. Further, the method may include controlling the one or more indicators based on the current control mode of the light switch. The light switch may, for example, include one or more indicator LEDs for indicating its current control mode (e.g., the first (individual) control mode or the second (group) control mode). This is beneficial as it improves the usability of the lighting control by informing the user that the portable device is set to the first control mode in which the first lighting unit is controlled.

[0015] The first signal may be a radio frequency signal, or alternatively, the first signal may be a different type of signal (ultrasonic signal, sound signal, light signal, temperature signal, etc.) whose received signal strength can be detected.

[0016] The portable device may be configured to communicate via a first communication technology and a second communication technology, a first signal may be communicated via the first communication technology, and when the portable device is set to a first control mode, a first lighting unit may be controlled according to a lighting control setting via the first communication technology.

[0017] Alternatively, the portable device may be configured to communicate via a first communication technology and a second communication technology. A first signal may be communicated via the first communication technology, and if the portable device is set to a first control mode, the first lighting unit may be controlled according to a lighting control setting via the second communication technology. For example, if the lighting unit is part of a network, it may be beneficial to use the first communication technology (e.g., a point-to-point communication technology) to determine a signal strength (which may indicate a distance) between the portable device and the first lighting unit, and to use the second communication technology (e.g., a (mesh) network communication technology) to control the first lighting unit (e.g., by communicating a lighting control command to the lighting unit). In this way, the network may be informed about the control of the first lighting unit.

[0018] When the portable device is set to the second control mode, the first lighting unit and / or other lighting units of the group of lighting units are controlled according to the lighting control settings via a second communication technology. For example, it may be beneficial to use a network communication technology (e.g. a mesh network communication technology such as Zigbee) to control the group of lighting units. In this way, the network may be informed about the control of the first lighting unit.

[0019] The first (wireless) communication technology may be a multi-hop communication technology (such as Zigbee, Thread, WirelessHART, SmartRF, Bluetooth Mesh, WiFi Mesh, or any other mesh or tree-based technology) and the second (wireless) communication technology may be a point-to-point communication technology (such as Bluetooth, Bluetooth Low Energy (BLE), Infrared (IR), near field communication (NFC), wireless local area communication (Wi-Fi), etc.).

[0020] The lighting units of a group of lighting units may be associated with a space. The lighting units may be associated or assigned, for example, to rooms (e.g., living room, kitchen, etc.) or zones (e.g., second floor, first floor, TV area). The lighting units may be associated with the space in a lighting control software application. Thus, if a user positions the portable device within a threshold range of a first lighting unit, the user can only control the first lighting unit with the portable device (other lighting units outside the threshold range in the space cannot be controlled). If a user positions the portable device outside the threshold range of the first lighting unit, the user can control all lighting units in the space (e.g., all lighting units located in a room) with the portable device. In other words, the portable device automatically switches between a (single) lighting unit control mode and a room control mode based on the signal strength of the signal communicated between the lighting units and the portable device.

[0021] Furthermore, the group of lighting units includes at least one second lighting unit, and the method further comprises: - receiving a second signal communicated between the portable device and a second lighting unit of the group of lighting units; - determining a second signal strength of the received second signal; and - if the first signal strength exceeds a threshold and the second signal strength exceeds a second threshold, setting the portable device to a third control mode in which a first lighting unit and a second lighting unit of the group of lighting units are controlled by the portable device; - if the first signal strength does not exceed the threshold and the second signal strength exceeds a second threshold, setting the portable device to a fourth control mode in which only a second lighting unit of the group is controlled by the portable device; The group of lighting units may include three or more lighting units. The threshold value and the second threshold value may be different or (substantially) equal. If two lighting units (e.g., a first lighting unit and a second lighting unit) are both within a threshold range from the portable device, the portable device may be set to a third control mode in which both lighting units may be controlled by the portable device. If only the second lighting unit, but not the first lighting unit, is located within the threshold range, the portable device may be set to a mode in which only the second lighting unit is controlled (and not the first lighting unit or other lighting units of the group). If none of the lighting units of the group of lighting units are located within a threshold range from the portable device, the portable device is set to a second control mode in which all lighting units of the group are controlled by the portable device.

[0022] According to a second aspect of the present invention, the above object is achieved by a computer program product for a computing device comprising computer program code for performing any of the methods described above when the computer program product is executed on a processing unit of the computing device.

[0023] According to a third aspect of the invention, the object is to provide a controller for controlling a group of lighting units, the controller comprising: - a communication unit configured to receive a first signal communicated between the portable device and a first lighting unit of a group of lighting units; - determining a first signal strength of a received first signal; if the first signal strength exceeds a threshold, setting the portable device to a first control mode in which only a first lighting unit of the group of lighting units is controlled by the portable device; if the first signal strength does not exceed a threshold, setting the portable device to a second control mode in which the lighting units of the group are controlled by the portable device; receiving user input via the portable device indicating a lighting control setting; When the portable device is set to the first control mode, controlling the first lighting unit according to the lighting control setting; and When the portable device is set to the second control mode, controlling the group of lighting units according to the lighting control settings. a processor configured to: The present invention is achieved by a controller including the following: A portable device may include the above controller.

[0024] It will be appreciated that the computer program product and controller may have similar and / or identical embodiments and advantages as the methods described above. [Brief description of the drawings]

[0025] The above and additional objects, features and advantages of the disclosed systems, devices and methods will be better understood through the following illustrative and non-limiting detailed description of embodiments of the devices and methods, with reference to the accompanying drawings. [Figure 1] FIG. 1 illustrates generally one embodiment of a system including a controller for controlling a number of lighting units. [Diagram 2] 2a-2d illustrate diagrammatically exemplary embodiments in which lighting units are controlled by a portable device based on their distance from the portable device. [Diagram 3] FIG. 3 shows an LED strip that includes multiple individually controllable lighting units. [Figure 4] 4a-4c show diagrammatically exemplary embodiments of a user interface for controlling a lighting unit. [Diagram 5] 5a-5c illustrate diagrammatically an exemplary embodiment of a light switch including a button. [Figure 6] FIG. 6 illustrates diagrammatically a method for controlling a first lighting unit of a group of lighting units. [Figure 7] FIG. 7 illustrates diagrammatically a method for controlling multiple lighting units of a group of lighting units. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] All figures are schematic, not necessarily to scale, and generally show only those parts necessary to clarify the invention, other parts may be omitted or merely suggested.

[0027] 1 shows a lighting system 100 including a controller 102 configured to control a number of lighting units 112, 114. The controller 102 may be located in the same environment in which the lighting units 112, 114 are located. The controller 102 may be included in, for example, a hub, bridge or other central controller of the lighting system. In other examples, the controller 102 may be included in a portable user device 110 such as a smartphone, tablet PC, wearable device, light switch, etc. Alternatively, the controller 102 may be included in a remote server that may communicate with the lighting units 112, 114 over a network such as the Internet. Alternatively, the controller 102 may be included in the lighting units 112, 114. The location of the controller 102 may depend on the system architecture of the lighting system 100.

[0028] The controller 102 includes a communication unit 104 configured to receive a first signal communicated between the portable device 110 and the first lighting unit 112. The first signal may be a signal communicated from the first lighting unit 112 to the portable device 110. The processor 106 of the portable device 110 may be configured to analyze the signal to determine its signal strength. Alternatively, the first signal may be communicated from the portable device 110 to the first lighting unit 112. The first lighting unit 112 may be configured to communicate the first signal, or an indication of its signal strength, to the controller 102, for example over a network.

[0029] Further, the controller 102 includes a processor 106 (e.g., a microcontroller, a circuit, etc.). The processor 106 is configured to determine a first signal strength of the received first signal. The processor 106 may be configured to calculate the first signal strength, or the first signal strength may be calculated by a further device (e.g., a remote device accessible via a network such as the Internet) and communicated to the processor 106. The first signal may be, for example, a radio frequency signal. Alternatively, the first signal may be a different type of signal (ultrasonic signal, sound signal, light signal, etc.) whose received signal strength can be detected. The processor 106 may analyze the first signal to determine a received signal strength indicator (RSSI) of the signal. This RSSI is a measure of the power present in the first signal. The RSSI may indicate the distance between the portable device 110 and the first lighting unit 112 (the accuracy of the distance depends on environmental factors). Additionally or alternatively, the noise of the first signal (which can be seen as a deviation from the average value of the RSSI) may indicate the signal strength and thus the distance between the portable device 110 and the first lighting unit 112. For example, when the distance between the portable device 110 and the first lighting unit 112 is small, the noise of the signal is typically lower than when the distance between the portable device 110 and the first lighting unit 112 is large. Thus, the noise of the signal (signal-to-noise ratio (SNR)) may also be indicative of the distance. Techniques for determining the RSSI (and optionally the SNR) of a signal are known in the art and therefore will not be discussed in detail.

[0030] Further, the processor 106 is configured to set the portable device 110 to a first control mode in which only a first lighting unit 112 of the group of lighting units 112, 114 is controlled by the portable device 110 if the first signal strength exceeds a threshold. This is illustrated in FIG. 2a. In FIG. 2a, the portable device 110 is located relative to the lighting units 112, 114 such that a signal communicated between the portable device 110 and the first lighting unit 112 is within a threshold signal strength range (indicated by arrow 132). The portable device 110 is not located within a second threshold signal strength range 134 of the second lighting unit 114. Therefore, the processor 106 may set the portable device 110 to the first control mode. As a result, when a user provides a user input, for example via the portable device 110, only the first lighting unit 112 (and not the second lighting unit) will be controlled by the processor 110 based on the user input.

[0031] Furthermore, the processor 106 is configured to set the portable device 110 to a second control mode in which the lighting units 112, 114 of the group are controlled by the portable device 110 if the first signal strength does not exceed the threshold. This is illustrated in Fig. 2b. In Fig. 2b, the portable device 110 is located outside the threshold signal strength ranges 132, 134 of the first and second lighting units 112, 114. Therefore, the processor 106 may set the portable device 110 to the second control mode. As a result, when a user provides a user input, for example via the portable device 110, both the first lighting unit 112 and the second lighting unit will be controlled by the processor 110 based on the user input.

[0032] Fig. 2c shows another example. In Fig. 2c, the portable device 110 is located relative to the lighting units 112, 114 such that the signal communicated between the portable device 110 and the second lighting unit 114 is within the threshold signal strength range 134. The portable device 110 is not located within the threshold signal strength range 132 of the first lighting unit 112. Therefore, the processor 106 may set the portable device 110 to a further (fourth) control mode in which only the second lighting unit 114 of the group is controlled by the portable device 110. As a result, when a user provides a user input, for example via the portable device 110, only the second lighting unit 114 will be controlled by the processor 110 based on the user input.

[0033] Fig. 2d shows another example where the group of lighting units 112, 114, 116 further includes a third lighting unit 116. In Fig. 2d, the portable device 110 is positioned relative to the lighting units 112, 114, 116 such that signals communicated between the portable device 110 and the first and second lighting units 112, 114 are within the respective threshold signal strength ranges 132, 134. The portable device 110 is not positioned within the threshold signal strength range 136 of the third lighting unit 116. Therefore, the processor 106 may set the portable device 110 to a further (third) control mode where the first and second lighting units 112, 114 of the group are controlled by the portable device 110. As a result, when a user provides user input, for example via the portable device 110, both the first and second lighting units 112, 114 will be controlled by the processor 110 based on the user input.

[0034] Further, the processor 106 may be configured to receive user input indicating a lighting control setting via the portable device 110. The user input may be received via a user interface of the portable device 110. The user interface may be, for example, a touch-sensitive display, and the user may, for example, select a light setting (e.g., a color, a light scene, an "on" or "off" setting, etc.) via the display. The user interface may be, for example, buttons (e.g., a rotary button, a push / touch button, etc.), and a light setting may be associated with the (each) button. The user interface may be a voice control interface, and the user may select a light setting by providing a voice command (e.g., "turn on the lights", "set a sunset scene", "set the lights blue", etc.), and the processor 106 may control the lights accordingly. Examples of user interfaces are described in more detail below with reference to Figures 4a-4c and 5b-5c.

[0035] Further, the processor 106 may be configured to control the lighting units 112, 114 of the group based on the received user input. The processor 106 may control the first lighting unit 112 (only) according to the lighting control settings associated with the user input when the portable device 110 is set to a first control mode, and the processor 106 may control all lighting units 112, 114 according to the lighting control settings associated with the user input when the portable device 110 is set to a second control mode.

[0036] Further, the communication unit 104 may include a transmitter for communicating lighting control instructions to the lighting units 112, 114 to control the lighting units 112, 114 according to a lighting control setting. The lighting control instructions may relate to one or more lighting control settings, which may be defined as, for example, RGB / HSL / HSB color values, CIE color values, intensity (brightness) values, beam angle / shape values, location values, etc. The lighting control instructions may be communicated (e.g., as messages) to the lighting units 112, 114 to control them. Various wired and wireless communication protocols may be used, such as, for example, Ethernet, DMX, DALI, USB, Bluetooth, Wi-Fi, Li-Fi, 3G, 4G, 5G, or ZigBee. A particular communication technology may be selected based on the communication capability of the lighting units 112, 114, the power consumption of a communication driver for the (wireless) communication technology, and / or the desired communication range of the signal. If the controller 102 is included in a remote server, the controller 102 may be configured to control the lighting units 112, 114 via an intermediary device such as a bridge, hub, central (home) lighting control system, a smartphone, etc. This may depend on the system architecture of the lighting system 100.

[0037] The communication unit 104 may be configured to communicate via multiple communication technologies. The communication unit 104 may include a first communication module and a second communication module. The first communication module may be configured to communicate via a first network technology, such as a first wireless communication technology, e.g., BLE, and the second communication module may be configured to communicate via a second network technology, such as a second wireless communication technology, e.g., Zigbee. These communication modules may be separate units (e.g., separate radio chips) included in the portable device, or both may be included in a single radio chip, which allows for low-cost devices that operate simultaneously as part of both a first network and a second network, leveraging a single wireless radio module. This may be achieved by rapidly switching the operation of the first and second communication technologies (e.g., Zigbee and BLE) over time such that the device remains connected and operates simultaneously in both networks. The possibility of operating a constrained device on two networks simultaneously opens new solutions that improve upon the limitations of these existing technologies. BLE is a low-power / low-cost wireless network technology that enables single-hop communication, for example, in a star topology between a master node and a limited number of power-constrained slave nodes. BLE provides energy-efficient connectivity between power-constrained slave devices and less power-constrained master devices. An example BLE network may consist of a mobile phone device as a master that can provide Internet connectivity to an ecosystem of resource-constrained devices such as sensors, wearables, and building automation devices. In the following example, a BLE and Zigbee combined radio is used. However, the present invention is equally applicable to any other combination of wireless communication technologies (e.g., BLE, infrared (IR), near field communication (NFC), wireless local area communication (Wi-Fi), ZigBee, Thread, WirelessHART, SmartRF, Zwave, etc.).

[0038] The first signal may be communicated between the portable device 110 and the first lighting unit 112 via a first communication technology (e.g., BLE). When the portable device 110 is set by the processor 106 to a first control mode, the first lighting unit 112 may be controlled according to the lighting control settings via the first communication technology (e.g., BLE). Alternatively, the first lighting unit 112 may be controlled according to the lighting control settings via a second communication technology (e.g., Zigbee). For example, when the lighting units are controlled via a network, e.g., via a central control device such as a bridge, it may be beneficial to use the first communication technology (e.g., a point-to-point communication technology) to determine a signal strength (which may indicate a distance) between the portable device and the first lighting unit, and to use the second communication technology (e.g., a (mesh) network communication technology) to control the first lighting unit (e.g., by communicating a lighting control command to the lighting unit). Further, the processor 106 may control the first lighting unit 112 and other lighting units 114, 116 of the group of lighting units in accordance with the lighting control settings via a second communication technology when the portable device 110 is set to a second (group) control mode.

[0039] The lighting units 112, 114 may be configured to receive lighting control commands from the controller 102 directly (e.g., via BLE, WiFi, Zigbee, etc.) or indirectly (e.g., via a (mesh) network). The lighting units 112, 114 may include one or more light sources (e.g., LED / OLED light sources). The lighting units 112, 114 may be configured to provide general lighting, task lighting, ambient lighting, atmosphere lighting, accent lighting, indoor lighting, outdoor lighting, etc. The lighting units 112, 114 may be installed in a lighting fixture. The lighting units 112, 114 may be portable lighting units (e.g., palm-sized devices such as LED cubes, LED spheres, object / animal shaped lighting units, etc.) or wearable lighting units (e.g., light bracelets, light necklaces, etc.). The lighting units 112, 114 may be individually addressable and / or individually controllable light sources of a lighting fixture (e.g., a light source array, an LED strip, etc.). An example of such a lighting fixture 300 is shown in Figure 3, where multiple lighting units are included in the lighting fixture 300 (e.g., an LED strip). In Figure 3, only two lighting units 112, 114 and two signal strength threshold ranges 132, 134 are labeled with reference numbers.

[0040] Furthermore, the processor 106 may be configured to indicate the current mode of the portable device 110 via a user interface of the portable device. An example is shown in Figs. 4a-4c. These figures show a portable device 110 (e.g., a smartphone, a smartwatch, a tablet PC, etc.) including a touch-sensitive display 400. Figs. 4a and 4b show the user interface rendered when the second (group) control mode is active. Fig. 4c shows the user interface rendered when the first (individual) control mode is active. The user interface of Fig. 4c allows a user to control only the first lighting unit 112 ("Lamp 1") by providing a user input 406 and choosing a color for Lamp 1 within a color wheel rendered on the display 400. This user interface is activated by the processor 106 when the received signal strength of the first signal exceeds a first threshold (see Fig. 2a). The user interfaces of Figures 4a and 4b allow a user to control a group of lighting units 112, 114, 116 by providing user input 402 and selecting a light scene (e.g., daylight setting, sunset setting, night setting) for the lamps of the group (Figure 4a), or by providing user input 404 and choosing a color for the lamps of the group (lamps 1, 2 and 3) from a color wheel that is rendered on the display 400, as shown in Figure 4b. The user interface of Figure 4a or 4b is activated by the processor 106 when the received signal strength of the first signal does not exceed a first threshold (or other threshold) (see Figure 2b).

[0041] The portable device 110 may be a light switch. The light switch may include one or more buttons (e.g., push buttons, touch-sensitive buttons, rotary buttons, etc.) for controlling the light output of a group of lighting units 112, 114. The buttons may be configured to receive user input for, for example, turning the light on / off, selecting a light setting or scene (e.g., by rotating a rotary button or by cycling through light settings or scenes with subsequent actuations of the button), dimming the light, etc.

[0042] Additionally, the light switch may include one or more indicators (e.g., LED indicator light, vibration motor, speaker) to indicate the current control mode of the light switch. Additionally, the processor 106 may be configured to control the one or more indicators based on the current control mode of the light switch. Figures 5b and 5c show a light switch 110 including two indicator lights under the surface of the button 510. The light switch 110 includes a first icon 502 and a second icon 504 of a transparent material to indicate the current state when the respective indicator lights are turned on. Figure 5a shows an example where the first (individual) control mode is active, and Figure 5b shows an example where the second (group) control mode is active.

[0043] One or more buttons of the light switch may be associated with a lighting control setting. The lighting control setting may depend on the current state of the lighting units. For example, when the light switch is set to a first (individual) control mode, the processor 106 controls the first lighting unit 112 based on the actuation of a button of the light switch. A user may, for example, press the button 510 to turn on the first lighting unit 112. For example, when the light switch is set to a second (group) control mode, the processor 106 controls the group of lighting units 112, 114 based on the actuation of a button of the light switch. A user may, for example, press the button 510 to turn on the lighting units of the group. Additionally or alternatively, the button may be a rotary button. For example, when the light switch is set to the first (individual) control mode, a user may, for example, rotate the rotary button to dim the light output of the first lighting unit 112. For example, when the light switch is set to the second (group) control mode, the user can rotate the rotary button to, for example, dim the light output of the group of lighting units 112, 114. In the above example, the lighting control setting(s) associated with the button are the same for the different control modes. Alternatively, the lighting control setting(s) associated with one or more buttons of the light switch may depend on the control mode of the light switch and may be different for each control mode. For example, when the light switch is set to the first (individual) control mode, the user can rotate the rotary button to, for example, choose a color for the first lighting unit 112, and when the light switch is set to the second (group) control mode, the user can rotate the rotary button to, for example, dim the light output of the group of lighting units 112, 114. This allows the user to first set the light settings of the individual lamps using the button and then control the entire group with the same button.

[0044] Furthermore, the portable device 110 (e.g., a light switch) may include attachment means for attaching the portable device 110 to a docking object 500 (e.g., a docking station, a wall plate, etc., see FIG. 5a) configured to receive the portable device 110. The attachment means may be, for example, a magnet, a snap means, an adhesive means, etc. Such attachment means are known in the art and therefore will not be discussed in detail. Furthermore, the processor 106 may be configured to detect whether the portable device 110 is attached to the docking object 500 and, if the portable device 110 is attached to the docking object 500, to set the portable device 110 to the second control mode. Additionally or alternatively, the docking object 500 may include means for detecting whether the portable device 110 is attached to the docking object 500 and the docking object may communicate a signal indicative of this to the portable device 110. The detection may be based, for example, on the presence of a magnetic field (due to one or more magnets included in the portable device 110 and / or the docking object 500), on a signal from a light sensor located on the attachment side of the portable device 110 (signal indicating a change in light indicating that the portable device 110 is attached to the docking object 500), or on a signal from a button that is pressed when the portable device 110 is attached to the docking object 500. Thus, the portable device 110 may be set to a second control mode when attached to the docking object 500 (potentially overriding the first control mode if the signal strength exceeds a threshold).

[0045] The lighting units 112, 114 of a group of lighting units may be associated with a space. The lighting units 112, 114 may, for example, be associated or assigned to a room (e.g., living room (see Fig. 4a and Fig. 4b), kitchen, etc.). The lighting units 112, 114 may be associated with a space in a lighting control software application. Thus, if a user positions the portable device 110 within a threshold range of a first lighting unit 112, the user can only control the first lighting unit 112 with the portable device 110 (other lighting units outside the threshold range in the space cannot be controlled). If a user positions the portable device 110 outside the threshold range of the first lighting unit, the user can control all lighting units 112, 114 in the space (e.g., all lighting units located in the room) with the portable device 110.

[0046] The threshold may be based on a user's preference. The user may set the threshold, for example, via a user interface (e.g., by selecting a threshold range / distance, where if the portable device 110 is located within the threshold range, it is set to the first control mode). The threshold may be set, for example, via a slider on a touch-sensitive display. Alternatively, the threshold may be set by setting a distance (e.g., 30 cm, 50 cm, 1 m, etc.) via a user interface (e.g., via a touch-sensitive display, by providing voice input, etc.).

[0047] Additionally or alternatively, the thresholds may be based on one or more characteristics of the lighting units 112, 114. The characteristics may relate, for example, to the location of the lighting units, the type of lighting units, the light rendering capabilities of the lighting units, etc. In a first example, the characteristics may relate to the type of lighting units. For example, a ceiling luminaire may have a larger threshold range compared to a desk lamp, or an LED strip with individually addressable lighting units may have a smaller threshold range for the individually addressable lighting units compared to a desk lamp. In another example, the characteristics may relate to the location of each lighting unit relative to the space. For example, a lighting unit located on the ceiling may have a larger threshold range compared to a lamp located on the floor. In another example, the characteristics may relate, for example, to the location of each lighting unit relative to other lighting units. For example, if the lighting units are located close to each other, these threshold ranges may be smaller, whereas if the lighting units are located less close to each other, these threshold ranges may be larger. Techniques for determining the location of lighting units relative to a space or relative to each other are known in the art and therefore will not be discussed in detail.

[0048] Additionally or alternatively, the threshold may be based on historical control events or historical usage of the lighting system. Further, the processor 106 may be configured to identify patterns by monitoring the control of the lighting system, determine the signal strength each time a user controls the lighting units 112, 114 with the portable device 110, and set the threshold for lighting control based on the historical control and signal strength. The signal strength threshold for switching from the first mode to the second mode may be, for example, an average of the (historical) signal strength. In this way, the processor 106 may learn the threshold.

[0049] 6 illustrates generally a method 600 for controlling a first lighting unit 112 of a group of lighting units 112, 114. The method 600 includes receiving 602 a first signal communicated between the portable device 110 and the first lighting unit 112, and determining 604 a first signal strength of the received first signal. The method includes determining 605 whether the first signal strength exceeds a threshold. Furthermore, the method includes setting 606 the portable device 110 to a first control mode in which only the first lighting unit 112 of the group of lighting units 112, 114 is controlled by the portable device 110 if the first signal strength exceeds the threshold, or setting 608 the portable device 110 to a second control mode in which the lighting units 112, 114 of the group are controlled by the portable device 110 if the first signal strength does not exceed the threshold. Further, the method includes receiving 610 a user input via the portable device 110 indicating a lighting control setting, and controlling 612 a first lighting unit 112 in accordance with the lighting control setting if the portable device 110 is set to a first control mode, or controlling 614 a group of lighting units 112, 114 in accordance with the lighting control setting if the portable device 110 is set to a second control mode.

[0050] Fig. 7 shows the method of Fig. 6 with additional steps. Additionally, the method 700 includes receiving 702 a second signal communicated between the portable device 110 and a second lighting unit 114 of the group of lighting units 112, 114, and determining 704 a second signal strength of the received second signal. The method includes determining 705 whether the second signal strength exceeds a second threshold. The steps of receiving 702, determining 704 and determining 705 are shown in Fig. 7 after the step of determining 605 whether the first signal strength exceeds a threshold. It should be understood that the steps of receiving 702, determining 704 and determining 705 may occur before or during steps 602, 604 and 605.

[0051] The method includes setting 706 the portable device 110 to a third control mode in which a first lighting unit 112 and a second lighting unit 114 of the group of lighting units 112, 114 are controlled by the portable device 110 if the first signal strength exceeds a threshold and the second signal strength exceeds a second threshold, and controlling 712 the first lighting unit 112 and the second lighting unit 114 in accordance with the lighting control setting.

[0052] The method includes setting 606 the portable device 110 to a first control mode and controlling 612 the first lighting unit 112 according to the lighting control setting if the first signal strength exceeds a threshold and the second signal strength does not exceed a second threshold.

[0053] The method 700 includes, if the first signal strength does not exceed the threshold and the second signal strength exceeds the second threshold, setting 708 the portable device 110 to a fourth control mode in which only a second lighting unit 114 of the group is controlled by the portable device 110, and controlling 714 the second lighting unit 114 in accordance with the lighting control setting.

[0054] The method 700 includes setting 608 the portable device 110 to a second control mode if the first signal strength does not exceed a threshold and the second signal strength does not exceed a second threshold, and controlling 614 the first lighting unit 112 and the second lighting unit 114 according to the lighting control setting.

[0055] The methods 600 , 700 may be performed by computer program code of a computer program product when the computer program product is executed on a processing unit of a computing device, such as the processor 106 of the controller 102 .

[0056] It should be noted that the above-described embodiments are illustrative rather than limiting of the invention, and that those skilled in the art can design many alternative embodiments without departing from the scope of the appended claims.

[0057] In the claims, any reference signs placed between parentheses shall not be interpreted as limiting the claim. Use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer or processing unit. In a device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain means are recited in mutually different dependent claims does not indicate that a combination of these means cannot be used to advantage.

[0058] Aspects of the invention may be embodied in a computer program product, which may be a collection of computer program instructions stored on a computer-readable storage device that may be executed by a computer. The instructions of the invention may be any interpretable or executable code mechanism, including, but not limited to, a script, an interpretable program, a dynamic link library (DLL), or a Java class. The instructions may be provided as a complete executable program, a partial executable program, a modification (e.g., an update) to an existing program, or an extension (e.g., a plug-in) to an existing program. Additionally, parts of the processing of the invention may be distributed across multiple computers or processors, or a "cloud."

[0059] Suitable storage media for storing computer program instructions include all forms of non-volatile memory, including, but not limited to, EPROM, EEPROM and flash memory devices, magnetic disks such as internal and external hard disk drives, removable disks and CD-ROM disks. The computer program may be distributed on such storage media or may be made available for downloading via HTTP, FTP, email or a server connected to a network such as the Internet.

Claims

1. 1. A method for controlling a group of lighting units, the method comprising the steps of: receiving a first signal communicated between a portable device and a first lighting unit of a group of lighting units, the group of lighting units including at least two lighting units including the first lighting unit; determining a first signal strength of a received first signal; if the first signal strength exceeds a threshold, setting the portable device to a first control mode in which only the first lighting unit of the group of lighting units is controlled by the portable device; if the first signal strength does not exceed the threshold, setting the portable device to a second control mode in which the at least two lighting units of the group are controlled by the portable device; A method comprising:

2. The method comprises: receiving a user input via the portable device indicating a lighting control setting; when the portable device is set to the first control mode, controlling the first lighting unit according to the lighting control settings; when the portable device is set to the second control mode, controlling the group of lighting units according to the lighting control settings; The method of claim 1 , comprising:

3. The method comprises: indicating, via a user interface, a current control mode of the portable device; The method of claim 1 or 2, comprising:

4. The portable device includes a display for rendering the user interface, the method comprising: rendering a first user interface on the display when the portable device is set to the first control mode, the first user interface being configured to receive user input for controlling the first lighting unit; rendering a second user interface on the display when the portable device is set to the second control mode, the second user interface being configured to receive user input for controlling the group of lighting units; The method of claim 3 , comprising:

5. 5. The method of claim 1, wherein the portable device is a light switch and user input is received via a button on the light switch.

6. The portable device includes an attachment means for attaching the portable device to a docking object configured to receive the portable device, the method comprising: detecting whether the portable device is attached to the docking object; setting the portable device to the second control mode when the portable device is attached to the docking object; The method of any one of claims 1 to 5, comprising:

7. The method of claim 1 , wherein the first signal is a radio frequency signal.

8. 8. The method of claim 1, wherein the portable device is configured to communicate via a first communication technology and a second communication technology, the first signal is communicated via the first communication technology, and when the portable device is set to the first control mode, the first lighting unit is controlled in accordance with a lighting control setting via the first communication technology.

9. 8. The method of claim 1, wherein the portable device is configured to communicate via a first communication technology and a second communication technology, the first signal is communicated via the first communication technology, and when the portable device is set to the first control mode, the first lighting unit is controlled according to a lighting control setting via the second communication technology.

10. 10. The method according to claim 8 or 9, wherein when the portable device is set to the second control mode, the first lighting unit and / or other lighting units of the group of lighting units are controlled according to a lighting control setting via the second communication technology.

11. The method according to any one of the preceding claims, wherein the lighting units of the group of lighting units are associated with a space.

12. The group of lighting units includes at least one second lighting unit, the method comprising: receiving a second signal communicated between the portable device and a second lighting unit of the group of lighting units; determining a second signal strength of the received second signal; if the first signal strength exceeds the threshold and the second signal strength exceeds a second threshold, setting the portable device to a third control mode in which the first lighting unit and the second lighting unit of the group of lighting units are controlled by the portable device; if the first signal strength does not exceed the threshold and the second signal strength exceeds the second threshold, setting the portable device to a fourth control mode in which only the second lighting unit of the group is controlled by the portable device; The method of any one of claims 1 to 11, comprising:

13. A computer program for a computing device comprising computer program code for performing the method of any one of claims 1 to 12, when the computer program is executed on a processing unit of the computing device.

14. A controller for controlling a group of lighting units, the controller comprising: a communication unit configured to receive a first signal communicated between a portable device and a first lighting unit of a group of lighting units, the group of lighting units including at least two lighting units including the first lighting unit; determining a first signal strength of the received first signal; if the first signal strength exceeds a threshold, setting the portable device to a first control mode in which only the first lighting unit of the group of lighting units is controlled by the portable device; and if the first signal strength does not exceed the threshold, setting the portable device to a second control mode in which the at least two lighting units of the group are controlled by the portable device. a processor configured to: Including, the controller.

15. A portable device comprising the controller of claim 14.

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