Abstract: The invention relates to an apparatus (100) and a method for generating a model output x(ti) describing a circadian rhythm of a person (P) at a time ti. In a preferred embodiment, a light sensor providing the photic exposure (L(ti)) and an activity signal (A(ti)) indicating the current level of activity of the person (P) at the time ti based on motion measurements (via an accelerometer) are used to calculate a wakefulness variable (?) that indicates if the person (P) is awake or sleeping. The wakefulness variable is then used to determine a driving term (N(t)) for a driven oscillator model (135) which simulates the model output x(t) under the joint influence of light and activity.

Abstract: The present disclosure pertains to a light sensing system configured to determine an amount of ambient light exposure experienced by a subject. The present invention wirelessly exchanges light information between different wearable devices of the same user and/or between devices of different users. Local and/or central light profile databases are built-up by the system and are shared between the devices so that light data that is typical for a location at a specific time of day and year can be used to estimate current ambient light levels for situations in which no measurement can be taken.

Abstract: The present invention relates to a light sensing system for sensing ambient light intensity, comprising a light sensing device with at least one light sensor and a calibration device for calibrating the sensor. The calibration device comprises at least one light source that emits light with a standard intensity. The invention is further related to a corresponding method for calibrating a light sensing device, comprising the illumination of the light sensor of the light sensing device with light that has a standard intensity, the comparison of the output intensity signal of the sensor with an expected signal that corresponds to the standard intensity, and the matching of the output intensity signal of the sensor to the expected signal by adjusting a gain parameter of the sensor.

Abstract: The invention relates to a light sensing device for sensing ambient light intensity, comprising at least one ambient light sensor and an occlusion detector for detecting an object occluding the ambient light sensor. The invention is further related to a corresponding method for sensing ambient light intensity.

Abstract: The invention relates to a wrist-worn device (10) for sensing ambient light intensity, comprising a plurality of light receivers arranged at different positions of the wrist-worn device (10) in different orientations to receive light from different directions (+X, ?X; +Y, ?Y; ?Y; +Z, ?Z).

Abstract: Systems and methods to predict circadian phase of a subject use one or more sensors to track light exposure of the subject over a period and determine the current circadian phase. A prediction for future light exposure is used to predict a future circadian phase.

Abstract: The present disclosure pertains to a light sensing system configured to determine an amount of ambient light exposure experienced by a subject. The present invention wirelessly exchanges light information between different wearable devices of the same user and/or between devices of different users. Local and/or central light profile databases are built-up by the system and are shared between the devices so that light data that is typical for a location at a specific time of day and year can be used to estimate current ambient light levels for situations in which no measurement can be taken.

Abstract: A light therapy device (1) comprises: at least one light source (2); a control device (10) for controlling the operation of the light source; a boundary memory (11) containing boundary information defining boundaries for the distance (D) and relative angle (f) of a user's head with respect to the light source; monitoring means (30) for monitoring the actual distance and actual relative angle of the user's head and generating an output signal indicating the measured distance and angle. The control device has an input coupled to the memory for receiving the boundary information, and has an input coupled to the monitoring means for receiving the output signal from the monitoring means. The control device compares the output signal from the monitoring means with the boundary information, and issues a warning signal when the actual position and/or orientation of the user's head and/or eyes is/are outside said boundaries.

Abstract: The invention relates to an apparatus (100) and a method for generating a model output x(ti) describing a circadian rhythm of a person (P) at a time ti. In a preferred embodiment, a light sensor providing the photic exposure (L(ti)) and an activity signal (A(ti)) indicating the current level of activity of the person (P) at the time ti based on motion measurements (via an accelerometer) are used to calculate a wakefulness variable (?) that indicates if the person (P) is awake or sleeping. The wakefulness variable is then used to determine a driving term (N(t)) for a driven oscillator model (135) which simulates the model output x(t) under the joint influence of light and activity.

Abstract: The invention relates to a wrist-worn device (10) for sensing ambient light intensity, comprising a plurality of light receivers arranged at different positions of the wrist-worn device (10) in different orientations to receive light from different directions (+X, ?X; +Y, ?Y; ?Y; +Z, ?Z).

Abstract: The present invention relates to a light sensing system for sensing ambient light intensity, comprising a light sensing device with at least one light sensor and a calibration device for calibrating the sensor. The calibration device comprises at least one light source that emits light with a standard intensity. The invention is further related to a corresponding method for calibrating a light sensing device, comprising the illumination of the light sensor of the light sensing device with light that has a standard intensity, the comparison of the output intensity signal of the sensor with an expected signal that corresponds to the standard intensity, and the matching of the output intensity signal of the sensor to the expected signal by adjusting a gain parameter of the sensor.

Abstract: The invention relates to a light sensing device for sensing ambient light intensity, comprising at least one ambient light sensor and an occlusion detector for detecting an object occluding the ambient light sensor. The invention is further related to a corresponding method for sensing ambient light intensity.

Abstract: The invention relates to a method for the exchange of personal information in non-trusted peer-to-peer environments in a step-by-step fashion, in which the information preferably prepared as a graphics display is segmented into several individual sections and is subsequently alternately exchanged between the communication partners.

Abstract: Information about a person's circadian rhythm is generated in terms of a difference between a reference and a specific circadian time for a specific wall-clock time or in terms of a difference between a special and a specific wall-clock time for a specific circadian time event.

Abstract: The present invention is related to an activity visualization device for personal use, said device being adapted to be used in close physical contact with an individual. Said device comprises an accelerometer for determining the physical activity of an individual, a memory for logging said physical activity over time, a processing unit for carrying out computational operations on the basis of the measured and/or logged data, and a visualization display for presentation of the measured and/or logged data, or data resulting from the computational operation thereof.

Abstract: A light therapy device (1) comprises: at least one light source (2); a control device (10) for controlling the operation of the light source; a boundary memory (11) containing boundary information defining boundaries for the distance (D) and relative angle (f) of a user's head with respect to the light source; monitoring means (30) for monitoring the actual distance and actual relative angle of the user's head and generating an output signal indicating the measured distance and angle. The control device has an input coupled to the memory for receiving the boundary information, and has an input coupled to the monitoring means for receiving the output signal from the monitoring means. The control device compares the output signal from the monitoring means with the boundary information, and issues a warning signal when the actual position and/or orientation of the user's head and/or eyes is/are outside said boundaries.

Abstract: An identification system which is not prone to man-in-the-middle attacks and which is capable of intra-body communication includes at least one wearable electronic key (1). The electronic key includes an intra-body communication interface (IBCI) and a storage device (DB) in which user identification data (ID) are stored, and an authentication server (AS) for verification of a user's fingerprint. At least one reader (2) has an intra-body communication interface (IBCI) and a fingerprint reader.

Abstract: An identification system according to the invention which is not prone to manin-the-middle attacks and is capable of intra-body communication comprises at least one wearable electronic key (1) having an intra-body communication interface (IBCI) and storage means (DB) wherein user identification data (ID) are stored, and at least one reader (2) having an intra-body communication interface (IBCI), wherein the identification system further comprises means (AS) for verification of a user's fingerprint. The invention broadens the scope of application of wearable electronic keys to areas with high security demands.

Abstract: Process for the gradual exchange of personal information in non-trusted peer-to-peer environments. Information, preferably prepared as graphical representations, is decomposed into a plurality of individual parts, then alternatively exchanged between the communication partners.

Abstract: The invention relates to a wireless network comprising at least two terminals which each contain a UPnP (Universal Plug and Play) software component and a UPnP controller software component. According to the invention, the UPnP controller software component of a terminal forwards specific messages from the associated UPnP software component to subordinate software components only following a change in the network topology.