Abstract: Disclosed is an artificial window (1) comprising a light box (10) having a rear wall (11) and a planar diffuser arrangement (14) in front of the rear wall (11). The artificial window further comprises at least one first light source (13) extending between the rear wall (11) and the diffuser (14); a window frame (20) in front of the diffuser (14); and drivers (15, 28) arranged for operating the light source (13) and electrically connected to the light source (13). The artificial window also comprises at least one additional light source (25) electrically connected to one of said drivers (28), which additional light source (25) radiates light in substantially one direction and is arranged to radiate light onto a portion of the front side of the diffuser arrangement (14) during operation.

Abstract: Disclosed is an artificial window (1) comprising a light box (10) having a rear wall (11) and a planar diffuser arrangement (14) in front of the rear wall (11). The artificial window further comprises at least one first light source (13) extending between the rear wall (11) and the diffuser (14); a window frame (20) in front of the diffuser (14); and drivers (15, 28) arranged for operating the light source (13) and electrically connected to the light source (13). The artificial window also comprises at least one additional light source (25) electrically connected to one of said drivers (28), which additional light source (25) radiates light in substantially one direction and is arranged to radiate light onto a portion of the front side of the diffuser arrangement (14) during operation.

Abstract: A light-generating device (1; 11) comprises at least one LED light source device (4) mounted on a front surface (7) of an MCPCB (2). The light-generating device (1; 11) further comprising a body (5) of open-cell metal foam, having a back surface (8) and a chamber (6) recessed in its back surface (8), the back surface (8) of the body (5) of open-cell metal foam being attached to the front surface (7) of the MCPCB (2) with the LED light source device (4) being arranged in the said chamber (6). The metal foam (5) preferably is aluminium, like the MCPCB (2). The metal foam (5) contributes substantially to the heat sinking and cooling of the device, effectively causes the output light to be diffused and become more homogenous, and provides a mechanical protection for the front side of the LED.

Abstract: A system 1 for controlling ambience of a designated environment comprises input means (3, 4-11) configured to receive at least one ambience input data, processing means (18) configured to process the at least one ambience input data in conjunction with a desired ambience profile for the designated environment, thereby generating at least one ambience output signal, and means (20) for providing said at least one ambience output signal to an ambience output unit, the unit being capable of generating a desired ambience corresponding to said ambience profile.

Abstract: An area light source (1) comprising a first light source (2) emitting light (L2) in a first wavelength range, and a light-transparent carrier screen (4) coated with a phosphorous layer (5) is disclosed. The area light source is characterised in that it comprises at least one additional light source (3) projecting light L3 in a second wavelength range, differing from said first wavelength range onto the carrier screen (4), said projected light L3 being capable of exciting the phosphorous layer (5).

Abstract: The artificial window (1) for use in apartments which lack a window through which day light may enter, has a light box (10) in which three sets of color lamps as light sources (13R,13G,13B) are mounted behind a diffuser (14). A window frame (20) is present in front of the diffuser (14) and a transparent plate (21) in the window frame (20), remote from the diffuser (14). Drivers (15) are present to start, to operate and to dim the light sources (13) thereby allowing to imitate natural light at different seasonal and time conditions. A number of features are described that further enhance the appearance of a real window.