Abstract:
The invention relates to a method and an illumination device (1) arranged for reducing sleep inertia and/or for controlling alertness of a human being. The illumination device (1) is arranged for reducing sleep inertia and/or controlling alertness by light radiation. The illumination device (1) comprises one or more light sources (3) for generating a first illumination output (I) in the range of 590-770 nm and a second illumination output (II) in the range of 400-560 nm. The illumination device (1) comprises a controller (2) configured for controlling the one or more light sources (3) to expose said eye of said human being to the first illumination output (I) during a first time interval (T1) and to the second illumination output (II) during a second time interval (T2). The second time interval (T2) terminates at a later point in time than the first time interval (T1). The time intervals are selected such that at least one of the first and second time interval is less than 60 seconds.
Abstract:
A wake-up appliance (100; 200; 300) comprises: an alarm device (20) generating an alarm signal; a control device (10) controlling the alarm device; at least one controllable light-generating device (1000; 2000; 3000) controlled by the control device. When the control device finds that an actual time becomes equal to a predetermined alarm time, it activates the alarm device. When the control device receives a user input signal at a snooze input, it stops the alarm signal and increases the intensity of at least a portion of the light generated in a blue range of the light spectrum.
Abstract:
The invention provides a lighting device (1) comprising one or more light sources (10) arranged to generate light, an accommodating device (5) having an external boundary (2) which is at least partly translucent and is arranged to accommodate the one or more light sources and a controller (40). The lighting device can generate two types of light. One or more lighting parameters selected from the group consisting of the first luminous intensity of the first type of light, the second luminous intensity of the second type of light, the color point of the first type of light and the color point of the second type of light can be controlled. This allows task lighting and atmosphere lighting. The invention is also directed to a method of providing a wake-up stimulus by means of such a lighting device.