A lighting system having a controller for controlling lighting devices

Abstract

A lighting system, comprising one or more lighting devices and a controller configured to control operation of the one or more lighting devices, is disclosed. The controller is configured to control operation of at least one of the lighting device(s) based on position and / or orientation of at least a portion of a person's or user's body relatively to the lighting device(s), where the said position and / or orientation is derived from sensor output of one or more sensors worn by a person or user.

Description

[0001] A LIGHTING SYSTEM HAVING A CONTROLLER FOR CONTROLLING LIGHTING

[0002] DEVICES

[0003] TECHNICAL FIELD

[0004] The present invention relates to a lighting system comprising one or more lighting devices and a controller configured to control operation of the one or more lighting devices.

[0005] BACKGROUND

[0006] Connected lighting systems, wherein lighting devices, e.g., based on lightemitting diode (LED) based light sources, are wired and / or wirelessly connected to a controller and wherein operation is controllable by means of the controller, e.g., by a user, have been developed. Such connected lighting systems have been and are being further developed with new types of luminaires, bulbs, sensors and accessories. For example, controlling capability of the lighting device for example in relation to the time of day and motion sensing capabilities have been developed. It is however desirable to further develop such connected lighting systems to make them even more attractive for users.

[0007] CN114630473A discloses a device that receives a target signal sent by head- worn equipment, wherein the target signal carries a first position parameter of a target object relative to the head-worn equipment, and the first position parameter is acquired by the head- worn equipment based on an angle sensor, a ranging sensor and a first magnetometer sensor. Second position parameters of the lighting device relative to the head-worn device are acquired based on the received target signals and the second magnetometer sensors. Target position information of the target visual object relative to the lighting equipment is determined based on the first position parameter and the second position parameter. A lightemitting unit is controlled corresponding to the target position information in the curved surface light-emitting module to illuminate based on the target position information.

[0008] US2020 / 205726A1 discloses an electronic device that comprises a bio-signal detection sensor configured to acquire first and second biometric information on an object outside the electronic device. A processor is configured to acquire the first and second biometric information by using the bio-signal detection sensor, configure a first variance, in which the first biometric information is changed, and a second variance, in which the second biometric information is changed. A state of the object related to the sleep is determined on the basis of at least a part of the first variance and the second variance, and a sleep latency related to the object is estimated on the basis of at least a part of the state.

[0009] US2016 / 081163A1 discloses an illumination system that includes a plurality of illumination apparatuses including a sleeping location illumination apparatus provided near a sleeping location. Each of the illumination apparatuses has a light source configured to irradiate an illumination light, a control unit configured to control lighting of the light source, and a transceiver configured to transmit and receive a control signal including a lighting signal for lighting the light source. A control unit of at least one of the illumination apparatuses turns on the light source before a preset wake-up time and controls the transceiver to transmit the control signal to another illumination apparatus.

[0010] SUMMARY

[0011] In a bedroom, many people have a table lamp or another type of lamp on the side of the bed (which may be referred to as a bedside lamp), which lamp may be controllable with respect to operation thereof. Light emitted from such a light source might be uncomfortable for the eyes of a user depending on the user’s orientation towards the light source. The inventors have realized that a ‘smart’ gadget such as, for example, a ‘smart’ watch, when worn by a person could be used to sense an indication of a position and / or orientation of the person in relation to such a light source, which may allow for or enable controlling operation of the light source based on the indication of position and / or orientation of the person in relation to the light source. Such controlling would be useful because, for example, if the light source would emit light having the same brightness irrespective of the orientation of the person in relation to the light source when the person is in bed and awake could disturb the person, which might be unpleasant for the person. According to another example, such controlling could be made to create a ‘wake-up’ lighting device controlling procedure when the person is in bed and asleep, wherein the light source is controlled to emit light depending on the orientation of the person in relation to the light source in order to provide a gentle wake-up experience for the person. According to another example, in case of a double bed, a bedside lamp of a first person occupying the bed may disturb a second person occupying the bed when the second person’s face is oriented towards said bedside lamp of the first person, especially when the second person is asleep. The bedside lamp of the first person could however then be controlled so that the light emitted by the bedside lamp of the first person does not disturb the second person when asleep.

[0012] In view of the above, a concern of the present invention is to provide means for adjusting the lighting in a space, such as, e.g., a room, to make the lighting more pleasant for a user when the user is in the space.

[0013] According to a first aspect of the present invention, a lighting system is provided. The lighting system comprises one or more lighting devices. Each of the one or more lighting devices is configured to, in operation, emit light. The lighting system comprises a controller. The controller is configured to control operation of the one or more lighting devices. Each of the one or more lighting devices is in a predetermined position in or at a space such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space. One or more wearable devices are coupled or couplable to the controller. Each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person. The controller is configured to obtain the sensed indication from the one or more wearable devices. The controller is configured to determine, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the one or more lighting devices when the said person is within the space. The controller is configured to control operation of at least one of the one or more lighting devices based on the determined indication.

[0014] According to a second aspect of the present invention, a method is provided. The method is (e.g., carried out, or implemented) in a lighting system comprising one or more lighting devices. Each of the one or more lighting devices is configured to, in operation, emit light. The lighting system comprises a controller. The controller is configured to control operation of the one or more lighting devices. Each of the one or more lighting devices is arranged in a predetermined position in or at a space such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space. One or more wearable devices are coupled or couplable to the controller. Each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person. The method comprises, by the controller, obtaining the sensed indication from the one or more wearable devices. The method comprises, by the controller, determining, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the one or more lighting devices when the said person is within the space. The method comprises, by the controller, controlling operation of at least one of the one or more lighting devices based on the determined indication.

[0015] The person for which the one or more sensors are configured sense at least an indication of one or more of a position and an orientation of at least a portion of the body may or may not be the person wearing the one or more wearable devices.

[0016] Thus, the controller may control operation of the one or more lighting devices based on information regarding the position and / or the orientation of at least a portion of the person’s body as determined by means of output from sensor(s) of one or more devices which the person may wear, and possibly also from sensor(s) arranged remotely from the person (e.g., non-contact sensors). To that end, the sensor(s) which the person may wear may for example comprise at least one of: one or more accelerometers, one or more magnetometers, one or more gyroscopes, one or more inertial sensors, one or more geolocation tracking devices, or one or more microphones. By the inclusion of such a type of sensor or types of sensors in the one or more wearable devices, the one or more wearable devices may be referred to as one or more ‘smart’ wearable devices, which provide functionality additional to the functionality of the device(s) which the device(s) may be mainly directed to implement or realize. Each or any wearable device of the one or more wearable devices may comprise or be constituted by one or more watches, one or more earbuds, headphones, one or more rings, glasses, or one or more fitness trackers. By means of sensors such as an accelerometer or a gyroscope, an orientation of the person wearing the wearable device including the sensor(s) can be derived from events such as turning of wrists, rotation of hands, walking, dominant hand detection, wearable position in body area network etc., for example employing pattern recognition algorithms. A sensor such as radar could be used to determine the position of the sensor - and in turn the person wearing the wearable device including the sensor - with respect to the environment such as a (e.g., substantially) flat surface of a bed in the space or any similar reference in the space. Another possibility is to employ Bluetooth direction finding, which could be used to determine positions of ‘smart’ wearables on or in the body and included in a so-called body area network, and based on the output from such determinations, the orientation of the face or head of the person and other parts of the person’s body could be determined by means of sensor fusion. The sensor(s) which may be arranged remotely from the person (e.g., non-contact sensors) may for example comprise one or more of a microwave and / or radio frequency sensor, a time-of-flight camera, or a night-vision or thermal camera. Such remotely arranged sensor(s) may also be configured to sense at least an indication of one or more of a position and an orientation of at least a portion of the person’s body.

[0017] For example, the space may be a bedroom in which the person may be sleeping, e.g., in a bed. When the person is sleeping (and is not due to wake up soon), having a light source emitting light of relatively high brightness towards the face of the person is generally undesirable, as such light could disturb the person and unintentionally wake up the person, which might be unpleasant for the person. By means of one or more embodiments of the present invention, the controller may be configured to control operation of such a light source so that the brightness of any light emitted towards the face of the person when the person is sleeping is (e.g., significantly) reduced or even so that the light source is turned off if it would emit light towards the face of the person when the person is sleeping. This may be achieved by the controller possibly being configured to control operation of at last one of the one or more lighting devices based on direction in which the person’s face is oriented, as derived from output from sensor(s) of one or more wearable devices which the person may wear.

[0018] To that end, for each wearable device of the one or more wearable devices, the one or more sensors may be configured to sense an indication of a direction in which the person’s face is oriented. The controller may be configured to obtain the sensed indication from the one or more wearable devices. The controller may be configured to determine, based on the sensed indication of the direction in which the person’s face is oriented, an indication of a direction in which the person’s face is oriented in relation to the position of each of the one or more lighting devices. The controller may be configured to control operation of at last one of the one or more lighting devices based on the indications of the direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices.

[0019] Thus, by means of a lighting system and a method according to the first and second aspects of the present invention, it may be facilitated or allowed for adjusting the lighting (e.g., a lighting scene) in a space, such as, e.g., a room, to make the lighting more pleasant for a user when the user is in the space.

[0020] A functionality of the one or more sensors of a wearable device such that the sensor(s) is or are configured to sense an indication of a direction in which the person’s face is oriented may be realized or implemented in different ways. To that end, for at least one of the one or more wearable devices, the sensor(s) may for example comprise a plurality of microphones and / or inertial sensors.

[0021] For example, according to one or more embodiments of the present invention, for at least one of the one or more wearable devices, the at least one wearable device is worn by a second person different from said person for which at least an indication of one or more of a position and an orientation of at least a portion of the body is sensed, said person being referred to as the first person, and the one or more sensors of the at least one wearable device worn by the second person may comprise a plurality of microphones (e.g., an array of microphones) which may be configured to record one or more audio signals, from any sound(s) originating from the oral cavity or nasal cavity of the first person and made by the first person while sleeping, captured by the plurality of microphones. The controller may be configured to obtain, from the said at least one wearable device, the one or more audio signals. The controller may be configured to use a pre-trained artificial intelligence (Al) model to generate an indication of a direction in which the first person’s face is oriented based on the one or more audio signals. The controller may be configured to determine, based on the said indication, an indication of a direction in which the first person’s face is oriented in relation to the position of each of the one or more lighting devices. The controller may be configured to control operation of at least one of the one or more lighting devices based on the indications of the direction in which the first person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices. The pretrained Al model may be re-trained (which, e.g., may be implemented by the controller) by the first person or user’s voice, breathing and / or snoring, etc., to improve predictions for a particular person and the environment in the particular space. In alternative or in addition, the plurality of microphones may not be arranged in a wearable device, but could instead be arranged somewhere in the space, e.g., at a fixed location within the space, for example in a luminaire in the ceiling of a room defining the space, or in a bedside lamp.

[0022] In alternative or in addition, according to one or more embodiments of the present invention, the at least one of the one or more wearable devices may comprise or be constituted by one or more earbuds. For the said at least one wearable device, the one or more sensors may comprise one or more inertial sensors included in (e.g., embedded in) the one or more earbuds, The one or more inertial sensors may be configured to sense at least an indication of an orientation of the person’s head when the person is wearing the one or more earbuds. Such inertial sensors may for example be included in (e.g., embedded in) noise- cancelling earbuds which could be used by the user (e.g., additionally) to suppress environmental noise or for playing sounds adapted for improving sleep of the user. As known in the art, an inertial sensor may measure the acceleration and angular velocity of an object along three mutually perpendicular axes.

[0023] The controlling of operation of at least one of the one or more lighting devices based on the determined indication by the controller may be carried out automatically. The controller may include a user interface, or be coupled or couplable to the user interface, via which the controller may receive user input. The controlling of operation of at least one of the one or more lighting devices based on the determined indication by the controller may possibly be triggered to be carried out by means of user input via the user interface.

[0024] ‘ Smart’ wearable devices as referenced in the foregoing may be configured to monitor at least an indication of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the one or more wearable devices, e.g., over an extended period of time such as a period of time during which the user normally sleeps during the night. Operation of at least one of the one or more lighting devices may be performed based on changes in such monitored parameters. For example, the light emitted by at least one of the one or more lighting devices may be adapted continually based on when or whenever the orientation of the person’s head and / or the orientation of another part of the person’s body changes during the extended period of time.

[0025] To that end, for each wearable device of the one or more wearable devices, the one or more sensors may be configured to continually or continuously sense at least an indication of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the one or more wearable devices. The controller may be configured to obtain the continually or continuously sensed indications from the one or more wearable devices. The controller may be configured to, when or whenever there is a change in the indication of one or more of the position and the orientation of at least a portion of the person’s body in relation to the position of each of the one or more lighting devices, redetermine the indication of one or more of the position and the orientation of at least a portion of the person’s body in relation to the position of each of the one or more lighting devices. The controller may be configured to control operation of at least one of the one or more lighting devices further based on the re-determined indication.

[0026] Orientation of the face or head of the person and other parts of the person’s body could, in alternative or in addition, be determined by means of a time-of-flight camera. As known in the art, a time-of-flight camera is a range imaging camera system for measuring distances between the camera and a subject for each point of an image captured by the camera. In alternative or in addition, the orientation of the person’s face or head could be determined by means of a radar sensor, e.g., a so-called mmWave sensor, and / or a nightvision or thermal camera, which for example may be arranged in the ceiling of a room (e.g., in a luminaire in the ceiling of the room, or in a bedside lamp) which may define the mentioned space.

[0027] As mentioned, the controller is configured to obtain the sensed indication from the one or more wearable devices. To that end, the controller may be configured to receive or retrieve the sensed indication from the one or more wearable devices.

[0028] As mentioned, the one or more wearable devices are coupled or couplable to the controller. The one or more wearable devices may be coupled or couplable with the controller using a wired connection or coupling and / or a wireless connection or coupling, such as, for example a wired and / or a wireless connection or coupling as known in the art.

[0029] That fact that each wearable device of the one or more wearable devices includes one or more sensors configured to sense at least “an indication” of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the one or more wearable devices, does not necessarily entail that the sensor(s) is or are capable of directly sensing a position and / or an orientation of at least a portion of the person’s body (but that could be the case), but it may entail that the sensor(s) is or are capable of sensing one or more quantities from which a position and / or an orientation of at least a portion of the person’s body may be derived. That is, the one or more sensors may be configured to directly or indirectly sense at least of one or more of a position and an orientation of at least a portion of the person’s body.

[0030] In the context of the present application, by a device being ‘wearable’, it may be meant that the device is wearable by a human. Examples of wearable devices in accordance with one or more embodiments of the present invention include one or more watches, one or more earbuds, one or more rings, one or more glasses, or one or more fitness trackers. Such examples of wearable devices may be surface-mounted on the body of the human. However, in the context of the present application, “wearable” is not restricted to the case of the wearable devices may be surface-mounted on the human body, but also encompasses, e.g., the case of the devices being embedded inside the human body as, e.g., implants or pills. An example of the latter case is a so-called body area network, which may refer to a wireless network of wearable computing devices which may be embedded inside the human body or surface-mounted on the human body. According to an example implementation and in accordance with one or more embodiments of the present invention, the controller may be configured to change (decrease or increase) one or more of brightness, luminous intensity or (correlated) color temperature of light emitted by the lighting device(s) if the person’s face is directed towards the lighting device(s) and if the person is asleep. Such a configuration may be relevant for example in a case where the person is in the space and is sleeping and is not due to wake up, e.g., by an alarm having been set, for a considerable time.

[0031] In accordance with such an implementation example, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The one or more sensors configured to sense an indication of whether the person is asleep or not may comprise one or more blood oxygen sensors and / or one or more heart rate sensors, for example. Such type(s) of sensors may allow for recognition of, e.g., a level of reduced physical action of the person such as due to prolonged sleep. The one or more sensors configured to sense an indication of whether the person is asleep or not must not necessarily be included in a wearable device. For example, heart rate of a person may be sensed by means of a radar sensor, e.g., a so-called mmWave sensor.

[0032] The controller may be configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. Each lighting device of the one or more lighting devices may be controllable at least with respect to one or more of brightness, luminous intensity, color or (correlated) color temperature of the light emitted by the lighting device. The controller may be configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and for each lighting device of the one or more lighting devices, decrease one or more of brightness, luminous intensity, color or (correlated) color temperature of the light emitted by the lighting device if the person’s face is directed towards the lighting device.

[0033] According to another example implementation and in accordance with one or more embodiments of the present invention, the controller may be configured to, for each lighting device, if the person’s face is directed towards the lighting device, the lighting device is turned off in case it is providing direct light relatively to the person and is turned on only in case it is providing indirect light relatively to the person. Such a configuration may also be relevant for example in a case where the person is in the space and is sleeping and is not due to wake up, e.g., by an alarm having been set, for a considerable time.

[0034] In accordance with such an implementation example, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The controller may be configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. Each lighting device of the one or more lighting devices may be controllable at least with respect to turning off and turning on, so as to emit light and not emit light, respectively. The one or more lighting devices may include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting device configured to provide indirect light relatively to the person. The controller may be configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and controlling turning off and turning on the one or more lighting devices such that, for each of the one or more lighting devices, if the person’s face is directed towards the lighting device, the lighting device is turned off in case it is one of the one or more first lighting devices and is providing direct light relatively to the person and is turned on only in case it is one of the one or more second lighting devices and is providing indirect light relatively to the person.

[0035] In the context of the present application, by a lighting device being configured to provide direct light relatively to a person, it is meant that the lighting device is arranged in relation to the person such that light emitted by the lighting device can impinge on the person without being diffused or filtered or being reflected off some surface(s) before impinging on the person. In the context of the present application, by a lighting device being configured to provide indirect light relatively to a person, it is meant that the lighting device is arranged in relation to the person such that light emitted by the lighting device can impinge on the person only by first being diffused or filtered or being reflected off some surface(s) before impinging on the person.

[0036] According to another example implementation and in accordance with one or more embodiments of the present invention, the controller may be configured to increase one or more of brightness or luminous intensity of the light emitted by the lighting device(s) if the person’s face is directed towards the lighting device(s). Such a configuration may be relevant for example in a case where the person is in the space and is sleeping and is due to wake up, e.g., by an alarm having been set.

[0037] In accordance with such an implementation example, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The controller may be configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. Each lighting device of the one or more lighting devices may be controllable at least with respect to one or more of brightness or luminous intensity the light emitted by the lighting device. The controller may be configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and for each lighting device of the one or more lighting devices, increase one or more of brightness or luminous intensity of the light emitted by the lighting device if the person’s face is directed towards the lighting device.

[0038] According to another example implementation and in accordance with one or more embodiments of the present invention, the controller may be configured to control turning off and turning on the one or more lighting devices such that, for each of the one or more lighting devices, if the person’s face is directed towards the lighting device, the lighting device is turned on in case it is providing direct light relatively to the person. Such a configuration may also be relevant for example in a case where the person is in the space and is sleeping and is due to wake up, e.g., by an alarm having been set.

[0039] In accordance with such an implementation example, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The controller may be configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. Each lighting device of the one or more lighting devices may be controllable at least with respect to turning on and turning off, so as to emit light and not emit light, respectively. The one or more lighting devices may include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting device configured to provide indirect light relatively to the person. The controller may be configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and controlling turning off and turning on the one or more lighting devices such that, for each of the one or more lighting devices, if the person’s face is directed towards the lighting device, the lighting device is turned on in case it is one of the one or more first lighting devices and is providing direct light relatively to the person.

[0040] By the controller being configured to determine, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the person’s body in relation to the position of each of the one or more lighting devices when the person is within the space, and to control operation of at least one of the one or more lighting devices based on the determined indication, a number of possibilities for controlling operation of at least one of the one or more lighting devices to make the lighting more pleasant for one or more users when the user or users is or are in the space may be created.

[0041] For example, the operation of at least one of the one or more lighting devices may be controlled so as to create a ‘go to sleep’ lighting device controlling procedure, wherein any lighting device emitting light directly at the user (or person) is dimmed, and subsequently only lighting device(s) configured to provide indirect light relatively to the person are operated. The lighting device(s) configured to provide indirect light relatively to the person may be operated so as to mimic a sunset, while the lighting device(s) emitting light directly at the user (or person) may be dimmed so as to provide a warm glow. According to another example, the operation of at least one of the one or more lighting devices may be controlled so as to create a ‘wake-up’ lighting device controlling procedure, wherein at first, while the user or person is sleeping, only lighting device(s) configured to provide indirect light relatively to the person are operated, and later lighting device(s) configured to provide direct light relatively to the person are operated, in order to provide a gentle wake-up experience for the user or person. Possibly, the lighting device(s) configured to provide direct light relatively to the person could be operated to emit light having relatively high intensity to make sure that the user or person wakes up.

[0042] In case of two persons being in the space, such as in a portion of the space which is adapted to be used by the persons as a place of sleep (which portion may be defined by, e.g., a bed), and being asleep, and only one of the persons is due to wake up, e.g., by an alarm having been set, the operation of the lighting devices may be controlled so as to create a ‘wake-up’ lighting device controlling procedure with respect to one or more of the lighting devices to provide a gentle wake-up experience for the person due to wake up, while for the other person the operation of the lighting devices may be controlled so that any lighting device emitting light directly at the other person is dimmed or so that only lighting device(s) configured to provide indirect light relatively to the other person, but not lighting device(s) configured to provide direct light relatively to the other person, are operated.

[0043] Also in case of two persons being in a portion of the space which is adapted to be used by the persons as a place of sleep, which portion may be defined by a bed, and one of the persons wakes up and momentarily moves out of the portion of the space while the other person is sleeping, the operation of the lighting devices may be controlled so that any lighting device emitting light directly at the other (sleeping) person is dimmed or so that only lighting device(s) configured to provide indirect light relatively to the other person, but not lighting device(s) configured to provide direct light relatively to the other person, are operated, whereas any lighting device emitting light directly at the person who has moved out of the portion of the space may be controlled so that the brightness of the emitted light is sufficient for the person to be able to carry out a certain task, e.g., to go to a bathroom which may be adjoining the space, which may be defined by a bedroom. Such controlling may possibly be triggered by the person waking up and momentarily moves out of the portion of the space, e.g., by means of user input of that person via a user interface which may be included in the controller. Thereby, the user input from one of the persons may trigger the controlling of the operation of the lighting devices so as to not disturb the other person. According to a third aspect of the present invention, a system or an arrangement is provided. The system or arrangement comprises a lighting system according to the first aspect of the present invention. The system or arrangement comprises the one or more wearable devices described in the foregoing with reference to, e.g., the first aspect of the present invention. For each wearable device of the one or more wearable devices, the one or more sensors which are configured to sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person may comprise at least one of: one or more accelerometers, one or more magnetometers, one or more gyroscopes, one or more inertial sensors, one or more geolocation tracking devices, or one or more microphones.

[0044] According to a fourth aspect of the present invention, a controller of a lighting system according to the first aspect of the present invention or of a lighting system comprised in a system or arrangement according to the third aspect of the present invention is provided.

[0045] According to another aspect of the present invention, a computer-readable storage medium is provided, on which computer-readable storage medium a computer program product is stored. The computer program product is configured to, when executed in one or more processors of a controller (e.g., according to the fourth aspect of the present invention or included in a lighting system according to the first aspect of the present invention), perform a method according to the second aspect of the present invention.

[0046] According to yet another aspect of the present invention, a computer program product is provided. The computer program product is configured to, when executed in one or more processors of a controller (e.g., according to the fourth aspect of the present invention or included in a lighting system according to the first aspect of the present invention), perform a method according to the second aspect of the present invention.

[0047] Each of the one or more lighting devices may comprise at least one light source. Each or any light source of the at least one light source may for example comprise a solid-state emitter, such as one or more light-emitting diodes (LEDs) and / or one or more lasers. Each or any LED may for example include or be constituted by an inorganic LED and / or an organic LED (OLED). Solid state light emitters are relatively cost-efficient light sources since they in general are relatively inexpensive and have a relatively high optical efficiency and a relatively long lifetime. Examples of LEDs include semiconductor, organic, or polymer / polymeric LEDs, optically pumped phosphor coated LEDs, optically pumped nano-crystal LEDs or any other similar devices as would be readily understood by a person skilled in the art. For example, the term LED can encompass a bare LED die arranged in a housing, which may be referred to as a LED package. According to another example, the term LED can encompass a Chip Scale Package (CSP) LED, which may comprise a LED die directly attached to a substrate such as a printed circuit board (PCB), and not via a submount.

[0048] Further objects and advantages of the present invention are described in the following by means of exemplifying embodiments. Further features of, and advantages with, the present invention will become apparent when studying the appended claims and the description herein.

[0049] BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Exemplifying embodiments of the invention will be described below with reference to the accompanying drawings.

[0051] Fig. 1 is a schematic view of a lighting system according to an embodiment of the present invention.

[0052] Fig. 2 is a schematic view of a system or arrangement according to an embodiment of the present invention.

[0053] Fig. 3 is a flowchart illustrating a method according to an embodiment of the present invention.

[0054] All the figures are schematic, not necessarily to scale, and generally only show parts which are necessary in order to elucidate embodiments of the present invention, wherein other parts may be omitted or merely suggested.

[0055] DESCRIPTION WITH REFERENCE TO THE DRAWINGS

[0056] The present invention will now be described hereinafter with reference to the accompanying drawings, in which exemplifying embodiments of the present invention are shown. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments of the present invention set forth herein; rather, these embodiments of the present invention are provided by way of example so that this disclosure will convey the scope of the invention to those skilled in the art. In the drawings, identical reference numerals denote the same or similar components having a same or similar function, unless specifically stated otherwise.

[0057] Figure 1 is a schematic view of a lighting system 100 according to an embodiment of the present invention. The lighting system 100 comprises lighting devices 2, 3, 4, with each of the lighting devices 2-4 being configured to, in operation, emit light. The lighting system 100 comprises a controller 5, which is configured to control operation of the lighting devices 2-4. To that end, the controller 5 may be coupled or couplable with each of the lighting devices 2-4, so as to enable for communication of messages, data, signals, etc., between each of the lighting devices 2-4 and the controller 5. The controller 5 may hence be communicatively coupled or couplable with each of the lighting devices 2-4. The communicative coupling between each of the lighting devices 2-4 and the controller 5 may be employing any appropriate means for wired and / or wireless communicative coupling, e.g., means such as known in the art.

[0058] It is to be understood that the number of lighting devices included in the lighting system 100 is according to an example, and that the lighting system 100 may comprise fewer or more lighting devices than illustrated in Figure 1. The lighting system 100 may in principle comprise any number of lighting devices. The lighting system 100 could comprise only one lighting device.

[0059] Each of the lighting devices 2-4 is in a predetermined position in a space 1.

[0060] The space 1 may for example be defined by a room, e.g., in a building. Each of the lighting devices 2-4 is in a predetermined position in the space 1 such that each of the lighting devices 2-4, in operation, emits light within at least a portion of the space 1. Possibly, each or any of the lighting devices 2-4 could be arranged not in the space 1 but still be arranged at the space 1 in such a way that each of the lighting devices 2-4, in operation, emits light within at least a portion of the space 1. For example, each or any of the lighting devices 2-4 could be arranged in a hole in a wall of a room defining the space 1, such that the lighting device is not strictly inside the space 1 but is still able to emit light within at least a portion of the space 1. It is to be understood that the positions of the lighting devices 2-4 in the space 1 as illustrated in Figure 1 is exemplifying and for illustrating principles of one or more embodiments of the present invention, and that the illustrated positions are not limiting. The lighting devices 2-4 (as well as any further lighting device which could be included in the lighting system 100) could be arranged in in principle any positions in or at the space 1.

[0061] One or more wearable devices (not shown in Figure 1) are coupled or couplable to the controller 5. To that end, the controller 5 may be coupled or couplable with each or any of the one or more wearable devices, so as to enable for communication of messages, data, signals, etc., between each or any of the one or more wearable devices and the controller 5. The controller 5 may hence be communicatively coupled or couplable with each or any of the one or more wearable devices. The communicative coupling between each or any of the one or more wearable devices and the controller 5 may be employing any appropriate means for wired and / or wireless communicative coupling, e.g., means such as known in the art.

[0062] Each wearable device of the one or more wearable devices is configured to be worn by a person (not shown in Figure 1) and includes one or more sensors (not shown in Figure 1) configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person. The person for which the one or more sensors are configured sense at least an indication of one or more of a position and an orientation of at least a portion of the body may or may not be the person wearing the one or more wearable devices.

[0063] The controller 5 is configured to obtain the sensed indication from the one or more wearable devices, and determine, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the lighting devices 2-4 when the said person is within the space 1. The controller 5 is configured to control operation of at least one of the lighting devices 2-4 based on the determined indication.

[0064] For example, the space 1 may include a portion 6 of the space which is adapted to be used by the person as a place of sleep. The space 1 may for example be defined by a bedroom in a building. The said portion 6 of the space 1 may have a predetermined position in the space 1. The controller 5 may be configured to determine, based on the sensed indication, an indication of whether the person is in the said portion 6 of the space 1 or not. The portion 6 of the space 1 may in part be defined by a bed, a sofa, an armchair, or any other piece of furniture adapted so that it permits to be used by a person as a place of sleep. The portion 6 of the space 1 could for example be in part defined (or in part delimited) by a top surface of a bed on which the user can lie down and sleep. In a scenario where the space 1 is defined by a bedroom and the said portion 6 of the space 1 is defined (or in part delimited) by a top surface of a bed on which the person can lie down and sleep, the lighting devices 2 and 3 may be bedside lamps while the lighting device 4 may be adapted to provide more general illumination in the space 1 (e.g., the bedroom).

[0065] When the person in the space 1 is sleeping (and is not due to wake up soon), and possibly is in the said portion 6 of the space 1, having a light source emitting light of relatively high brightness towards the face of the person is generally undesirable, as such light could disturb the person and unintentionally wake up the person, which might be unpleasant for the person. The controller 5 may be configured to control operation of the lighting devices 2-4 so that for each of the lighting devices 2-4, the brightness of any light emitted by the lighting device towards the face of the person when the person is sleeping is (e.g., significantly) reduced or even so that the lighting device is turned off if it would emit light towards the face of the person when the person is sleeping. This may be achieved by the controller 5 possibly being configured to control operation of the lighting devices 2-4 based on direction in which the person’s face is oriented, as derived from output from sensor(s) of one or more wearable devices which the person may wear. A functionality of the one or more sensors of a wearable device such that the sensor(s) thereof is or are configured to sense an indication of a direction in which the person’s face is oriented may be realized or implemented in different ways, as has been described herein. For example, for at least one of the one or more wearable devices, the sensor(s) may for example comprise a plurality of microphones and / or inertial sensors, as has been described herein. Further, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The controller 5 may be configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device. The one or more sensors configured to sense an indication of whether the person is asleep or not may comprise one or more blood oxygen sensors and / or one or more heart rate sensors, for example, to allow for recognition of, e.g., a level of reduced physical action of the person such as due to prolonged sleep.

[0066] According to one implementation example and in accordance with one or more embodiments of the present invention, at least one wearable device of the one or more wearable devices may include one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the mentioned at least one wearable device. The controller 5 may be configured to obtain, from the mentioned at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the mentioned at least one wearable device.

[0067] Each of the lighting devices 2-4 may be controllable at least with respect to turning off and turning on, so as to emit light and not emit light, respectively. The lighting devices 2-4 include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting devices configured to provide indirect light relatively to the person.

[0068] The controller 5 may be further configured to, when the person is within the space 1, and possibly when the person is in the portion 6 of the space 1, and if the sensor(s) of the mentioned at least one wearable device indicates that the person is asleep, controlling turning off and turning on of the lighting devices 2-4 such that, for each the lighting devices 2-4, the lighting device is turned off in case it is one of the one or more first lighting devices and is providing direct light relatively to the person, and the lighting device is turned on only in case it is one of the one or more second lighting devices and is providing indirect light relatively to the person.

[0069] The above-described implementation example may for example be applicable in a case where the person is sleeping and is not due to wake up, e.g., by an alarm having been set, for a considerable time, and so as to only provide night light in the form of indirect light relatively to the person, e.g., by only using indirect, wall washing light sources for lighting during the night. If the person would be due to wake up such as by an alarm having been set, then the controller 5 could control the lighting devices 2-4 such that in addition or instead lighting device(s) being one of the one or more first lighting devices and providing direct light relatively to the person are turned on.

[0070] According to another implementation example and in accordance with one or more embodiments of the present invention, the controller 5 may obtain sensor output from two wearable devices worn by respective ones of two different persons which are in the space 1 and which may be sleeping, and based thereon control operation of the lighting devices 2-4, with the controlling for example being based on which of the two persons has been sleeping for the longest period of time.

[0071] In accordance with such an implementation example, at least a first wearable device and a second wearable device are coupled or couplable to the controller 5. The first wearable device is configured to be worn by a first person and includes one or more sensors configured to sense at least a first indication of one or more of a position and an orientation of at least a portion of the first person’s body when the first person is wearing the first wearable device. The second wearable device is configured to be worn by a second person and includes one or more sensors configured to sense at least a second indication of one or more of a position and an orientation of at least a portion of the second person’s body when the second person is wearing the second wearable device.

[0072] The controller 5 may be configured to obtain the sensed first indication and the sensed second indication from the first wearable device and the second wearable device, respectively.

[0073] Each of the first wearable device and the second wearable device may include one or more sensors configured to sense an indication of whether the first person and the second person, respectively, is asleep or not when the first person and the second person is wearing the first wearable device and the second wearable device, respectively.

[0074] The controller 5 may be configured to obtain, from the first wearable device, the sensed indication of whether the first person is asleep or not when the first person is wearing the first wearable device, and to obtain, from the second wearable device, the sensed indication of whether the second person is asleep or not when the second person is wearing the second wearable device.

[0075] The controller 5 may be configured to determine, based on the sensed first indication and the sensed second indication, respectively, an indication of one or more of the position and the orientation of at least a portion of the first person’s body in relation to the position of each of the one or more lighting devices 2-4 when the first person is within the space 1 and an indication of one or more of the position and the orientation of at least a portion of the second person’s body in relation to the position of each of the one or more lighting devices 2-4 when the second person is within the space 1.

[0076] The controller 5 may then be configured to control operation of at least one of the lighting devices 2-4 based on the said sensed indications of whether the first person is asleep or not when the first person is wearing the first wearable device and of whether the second person is asleep or not when the second person is wearing the second wearable device, and further based on at least one the said determined indications.

[0077] For example, the said sensed indications of whether the first person is asleep or not when the first person is wearing the first wearable device and of whether the second person is asleep or not when the second person is wearing the second wearable device may be monitored (e.g., during a certain period of time), by which it may be derived, e.g., which of the first person and the second person has been asleep for the longest time. The controller 5 may be configured to control operation of at least one of the lighting devices 2-4 based on which of the first person and the second person has been asleep for the longest time and at least one the said determined indications. For example, the controller 5 may then be configured to control operation of the lighting devices 2-4 so that for each of the lighting devices 2-4, the brightness of any light emitted by the lighting device towards the face of the person which has been asleep for the longest time is (e.g., significantly) reduced or even so that the lighting device is turned off if it would emit light towards the face of the person which has been asleep for the longest time.

[0078] Figure 2 is a schematic view of a system or arrangement 1000 according to an embodiment of the present invention. The system or arrangement 1000 comprises a lighting system 100 according to an embodiment of the present invention, such as, for example, a lighting system 100 as described in the foregoing with reference to Figure 1. For example with reference to the foregoing description with reference to Figure 1, the system or arrangement 1000 comprises the one or more wearable devices, one of which is indicated at 10 in Figure 2. The wearable device 10 comprises one or more sensors 11 configured to sense at least an indication of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the one or more wearable device 10. The one or more sensors 11 which are configured to sense at least an indication of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the wearable device 10 may comprise one or more accelerometers, one or more magnetometers, one or more gyroscopes, one or more inertial sensors, one or more geolocation tracking devices, and / or one or more microphones, for example. The wearable device 10 may for example comprise or be constituted by one or more watches, one or more earbuds, headphones, one or more rings, glasses, or one or more fitness trackers. According to one implementation example and in accordance with one or more embodiments of the present invention, the wearable device 10 may comprise or be constituted by one or more earbuds, wherein the one or more sensors 11 may comprise one or more inertial sensors included in the one or more earbuds, wherein the one or more inertial sensors are configured to sense at least an indication of an orientation of at least a portion of the person’s head when the person is wearing the one or more earbuds.

[0079] Figure 3 is a flowchart illustrating a method 20 according to an embodiment of the present invention. The method 20 is (e.g., carried out, or implemented) in a lighting system comprising one or more lighting devices. Each of the one or more lighting devices is configured to, in operation, emit light. The lighting system comprises a controller. The controller is configured to control operation of the one or more lighting devices. Each of the one or more lighting devices is arranged in a predetermined position in or at a space such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space. One or more wearable devices are coupled or couplable to the controller. Each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person.

[0080] The method 20 comprises, at 21, by the controller, obtaining the sensed indication from the one or more wearable devices. The method 20 comprises, at 22, by the controller, determining, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the one or more lighting devices when the said person is within the space.

[0081] The method 20 comprises, at 23, by the controller, controlling operation of at least one of the one or more lighting devices based on the determined indication.

[0082] The method 20 may then end.

[0083] In conclusion, a lighting system is disclosed. The lighting system comprises one or more lighting devices and a controller configured to control operation of the one or more lighting devices, is disclosed. The controller is configured to control operation of at least one of the lighting device(s) based on position and / or orientation of at least a portion of a person’s or user’s body relatively to the lighting device(s), where the said position and / or orientation is derived from sensor output of one or more sensors worn by a person or user.

[0084] While the present invention has been illustrated in the appended drawings and the foregoing description, such illustration is to be considered illustrative or exemplifying and not restrictive; the present invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the appended claims, the word “comprising” does not exclude other elements or steps, and the indefinite article ”a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

CLAIMS:

1. A lighting system (100) comprising: one or more lighting devices (2-4), each of the one or more lighting devices being configured to, in operation, emit light; and a controller (5) configured to control operation of the one or more lighting devices, wherein each of the one or more lighting devices is in a predetermined position in a space (1) such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space, wherein one or more wearable devices are coupled or couplable to the controller, and wherein each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person; wherein the one or more sensors are further configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device; wherein the controller is configured to: obtain the sensed indication from the one or more wearable devices; determine, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the one or more lighting devices when the said person is within the space; obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not; and control operation of at least one of the one or more lighting devices based on the determined indication by changing one or more of brightness, luminous intensity or color temperature of light emitted by at least one of the one or more lighting devices if the person’s face is directed towards the at least one of the one or more lighting devices and if the person is asleep.

2. A lighting system according to claim 1, wherein each lighting device of the one or more lighting devices is controllable at least with respect to turning off and turning on,so as to emit light and not emit light, respectively, and wherein the one or more lighting devices include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting devices configured to provide indirect light relatively to the person, and wherein the controller is further configured to, when the person is within the space and if the sensor(s) of said at least one wearable device indicates that the person is asleep; controlling turning off and turning on of the one or more lighting devices such that, for each of the one or more lighting devices, the lighting device is turned off in case it is one of the one or more first lighting devices and is providing direct light relatively to the person, and the lighting device is turned on only in case it is one of the one or more second lighting devices and is providing indirect light relatively to the person.

3. A lighting system according to claim 1, wherein, for each wearable device of the one or more wearable devices, the one or more sensors are configured to sense an indication of a direction in which the person’s face is oriented, and wherein the controller is configured to obtain the sensed indication from the one or more wearable devices, wherein the controller is configured to determine, based on the sensed indication of the direction in which the person’s face is oriented, an indication of a direction in which the person’s face is oriented in relation to the position of each of the one or more lighting devices, and wherein the controller is configured to control operation of at last one of the one or more lighting devices based on the indications of the direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices.

4. A lighting system according to claim 3, wherein at least one wearable device of the one or more wearable devices includes one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein the controller is configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein each lighting device of the one or more lighting devices is controllable at least with respect to one or more of brightness, luminous intensity, color or color temperature of the light emitted by the lighting device, and wherein the controller is configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep:based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and for each lighting device of the one or more lighting devices, decrease one or more of brightness, luminous intensity or color temperature of the light emitted by the lighting device if the person’s face is directed towards the lighting device.

5. A lighting system according to claim 3 or 4, wherein at least one wearable device of the one or more wearable devices includes one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein the controller is configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein each lighting device of the one or more lighting devices is controllable at least with respect to turning off and turning on, so as to emit light and not emit light, respectively, and wherein the one or more lighting devices include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting device configured to provide indirect light relatively to the person, and wherein the controller is configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and controlling turning off and turning on the one or more lighting devices such that, for each of the one or more lighting devices, if the person’s face is directed towards the lighting device, the lighting device is turned off in case it is one of the one or more first lighting devices and is providing direct light relatively to the person and is turned on only in case it is one of the one or more second lighting devices and is providing indirect light relatively to the person.

6. A lighting system according to claim 3, wherein at least one wearable device of the one or more wearable devices includes one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at leastone wearable device, and wherein the controller is configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein each lighting device of the one or more lighting devices is controllable at least with respect to one or more of brightness or luminous intensity the light emitted by the lighting device, and wherein the controller is configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and for each lighting device of the one or more lighting devices, increase one or more of brightness or luminous intensity of the light emitted by the lighting device if the person’s face is directed towards the lighting device.

7. A lighting system according to claim 3 or 6, wherein at least one wearable device of the one or more wearable devices includes one or more sensors configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein the controller is configured to obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, and wherein each lighting device of the one or more lighting devices is controllable at least with respect to turning on and turning off, so as to emit light and not emit light, respectively, and wherein the one or more lighting devices include one or more first lighting devices configured to provide direct light relatively to the person and one or more second lighting device configured to provide indirect light relatively to the person, and wherein the controller is configured to, if the sensor(s) of said at least one wearable device indicates that the person is asleep: based on the indications of a direction in which the person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices, determine, for each lighting device of the one or more lighting devices, if the person’s face is directed towards the lighting device or away from the lighting device; and controlling turning off and turning on the one or more lighting devices such that, for each of the one or more lighting devices, if the person’s face is directed towards thelighting device, the lighting device is turned on in case it is one of the one or more first lighting devices and is providing direct light relatively to the person.

8. A lighting system according to any one of claims 1-7, wherein at least a first wearable device and a second wearable device are coupled or couplable to the controller, and wherein the first wearable device is configured to be worn by a first person and includes one or more sensors configured to sense at least a first indication of one or more of a position and an orientation of at least a portion of the first person’s body when the first person is wearing the first wearable device, and wherein the second wearable device is configured to be worn by a second person and includes one or more sensors configured to sense at least a second indication of one or more of a position and an orientation of at least a portion of the second person’s body when the second person is wearing the second wearable device; wherein the controller is configured to obtain the sensed first indication and the sensed second indication from the first wearable device and the second wearable device, respectively; wherein each of the first wearable device and the second wearable device includes one or more sensors configured to sense an indication of whether the first person and the second person, respectively, is asleep or not when the first person and the second person is wearing the first wearable device and the second wearable device, respectively; wherein the controller is configured to obtain, from the first wearable device, the sensed indication of whether the first person is asleep or not when the first person is wearing the first wearable device, and to obtain, from the second wearable device, the sensed indication of whether the second person is asleep or not when the second person is wearing the second wearable device; wherein the controller is configured to determine, based on the sensed first indication and the sensed second indication, respectively, an indication of one or more of the position and the orientation of at least a portion of the first person’s body in relation to the position of each of the one or more lighting devices when the first person is within the space and an indication of one or more of the position and the orientation of at least a portion of the second person’s body in relation to the position of each of the one or more lighting devices when the second person is within the space; wherein the controller is configured to control operation of at least one of the one or more lighting devices based on the said sensed indications of whether the first person is asleep or not when the first person is wearing the first wearable device and of whether thesecond person is asleep or not when the second person is wearing the second wearable device, and further based on at least one the said determined indications.

9. A lighting system according to any one of claims 1-8, wherein, for each wearable device of the one or more wearable devices, the one or more sensors is or are configured to continually or continuously sense at least an indication of one or more of a position and an orientation of at least a portion of the person’s body when the person is wearing the one or more wearable devices, and wherein the controller is configured to obtain the continually or continuously sensed indications from the one or more wearable devices, and wherein the controller is configured to, when or whenever there is a change in the indication of one or more of the position and the orientation of at least a portion of the person’s body in relation to the position of each of the one or more lighting devices, redetermine the indication of one or more of the position and the orientation of at least a portion of the person’s body in relation to the position of each of the one or more lighting devices, and wherein the controller is configured to control operation of at least one of the one or more lighting devices further based on the re-determined indication.

10. A lighting system according to any one of claims 1-9, wherein for at least one of the one or more wearable devices, the at least one wearable device is worn by a second person different from said person for which at least an indication of one or more of a position and an orientation of at least a portion of the body is sensed, said person hereinafter being referred to as the first person, and the one or more sensors of the at least one wearable device worn by the second person comprise a plurality of microphones configured to record one or more audio signals from any sound(s) originating from the oral cavity or nasal cavity of the first person and made by the first person while sleeping captured by the plurality of microphones, and wherein the controller is configured to obtain, from the said at least one wearable device, the one or more audio signals, and wherein the controller is configured to use a pre-trained artificial intelligence model to generate an indication of a direction in which the first person’s face is oriented based on the one or more audio signals, wherein the controller is configured to determine, based on the said indication, an indication of a direction in which the first person’s face is oriented in relation to the position of each of the one or more lighting devices, and wherein the controller is configured to control operation of at least one of the one or more lighting devices based on the indications of the direction in which thefirst person’s face is oriented in relation to the position of the respective ones of the one or more lighting devices.

11. A system (1000) comprising: a lighting system (100) according to any one of claims 1-10; and the one or more wearable devices (10), wherein, for each wearable device of the one or more wearable devices, the one or more sensors (11) configured to sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person comprise at least one of one or more accelerometers, one or more magnetometers, one or more gyroscopes, one or more inertial sensors, one or more geolocation tracking devices, or one or more microphones.

12. A system according to claim 11, wherein each wearable device of the one or more wearable devices comprises or is constituted by one or more watches, one or more earbuds, headphones, one or more rings, glasses, or one or more fitness trackers.

13. A system according to any one of claims 11-12, wherein at least one of the one or more wearable devices comprises or is constituted by one or more earbuds, wherein for said at least one wearable device the one or more sensors comprise one or more inertial sensors included in the one or more earbuds, wherein the one or more inertial sensors are configured to sense at least an indication of an orientation of at least a portion of the person’s head when the person is wearing the one or more earbuds.

14. A controller (5) of a lighting system (100), the controller being configured to control operation of one or more lighting devices of the lighting system (100), wherein each of the one or more lighting devices is in a predetermined position in a space (1) such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space, wherein one or more wearable devices are coupled or couplable to the controller, and wherein each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person;wherein the one or more sensors are further configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device; wherein the controller is configured to: obtain the sensed indication from the one or more wearable devices; determine, based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation to the position of each of the one or more lighting devices when the said person is within the space; obtain, from the said at least one wearable device, the sensed indication of whether the person is asleep or not; and control operation of at least one of the one or more lighting devices based on the determined indication by changing one or more of brightness, luminous intensity or color temperature of light emitted by at least one of the one or more lighting devices if the person’s face is directed towards the at least one of the one or more lighting devices and if the person is asleep.

15. A method (20) in a lighting system comprising one or more lighting devices, wherein each of the one or more lighting devices is configured to, in operation, emit light, and a controller configured to control operation of the one or more lighting devices, wherein each of the one or more lighting devices is arranged in a predetermined position in or at a space such that each of the one or more lighting devices, in operation, emits light within at least a portion of the space, wherein one or more wearable devices are coupled or couplable to the controller, and wherein each wearable device of the one or more wearable devices is configured to be worn by a person and includes one or more sensors configured to, when the person is wearing the one or more wearable devices, sense at least an indication of one or more of a position and an orientation of at least a portion of the body of a person, wherein the one or more sensors are further configured to sense an indication of whether the person is asleep or not when the person is wearing the said at least one wearable device, the method comprising, by the controller: obtaining (21) the sensed indication from the one or more wearable devices; obtaining, from the said at least one wearable device, the sensed indication of whether the person is asleep or not; determining (22), based on the sensed indication, an indication of one or more of the position and the orientation of at least a portion of the said person’s body in relation tothe position of each of the one or more lighting devices when the said person is within the space; and controlling (23) operation of at least one of the one or more lighting devices based on the determined indication by changing one or more of brightness, luminous intensity or color temperature of light emitted by at least one of the one or more lighting devices if the person’s face is directed towards the at least one of the one or more lighting devices and if the person is asleep.

Images