Abstract:
Sistema (100) de alumbrado para la comunicación con un dispositivo (101) de control remoto, estando elsistema (100) de alumbrado adaptado para emitir luz para iluminación y para transmitir una señal decomunicación al dispositivo (101) de control remoto; estando el sistema (100) de alumbrado adaptado para detectar una señal de control desde un dispositivo(101) de control remoto, comprendiendo el sistema (100) de alumbrado un elemento emisor de luz; en el que el elemento emisor de luz comprende uno o más diodos (102, 113, 114, 115) emisores de luz odispositivos láser; en el que al menos uno de los diodos (102, 115) emisores de luz o dispositivos láser está adaptado parauna función de emisión de luz integrada, para emitir luz tanto para iluminación como para transmisión deuna señal de comunicación al dispositivo (101) de control remoto; caracterizado porque dicho uno o más de los diodos emisores de luz o dispositivos (102, 115) láser con la función de emisión deluz integrada está también adaptado para una detección, con el fin de detectar una señal de control desdeel dispositivo de control remoto; y porque se proporciona un elemento (103, 111) de conmutación para conmutar dicho uno o más de losdiodos emisores de luz integrados o dispositivos láser entre un modo de detección y un modo de emisión.
Abstract:
Light sensors (1) are used in lighting applications, especially in combination with LEDs, to control and/or adapt the color point of light sources. Costs and/or performance of the light sensor (1) are essential in order to guarantee cost- effective light sources with reproducible color points. This aim is achieved by a light sensor (1) comprising a light diffuser (10), an optical non-transparent housing (11) having at least one window (12), at least one interference filter (13) and at least two photo sensors (14). The light diffuser (10) is arranged in such a way that light from outside the optical non-transparent housing (11) has to pass the light diffuser (10) so as to enter the interior of the optical non-transparent housing (11) via the window (12). The interference filter (13) and the at least two photo sensors (14) are arranged in the interior of the optical non-transparent housing (11), which interference filter (13) is arranged between the window (12) and the at least two photo sensors (14).
Abstract:
An electroluminescent device (7) comprising at least one electroluminescent light source (2) and at least one electronic component (3) for driving the electroluminescent light source (2), which electronic component (3) is arranged in such a way as to be separated in space from the electroluminescent light source (2), the electrical connection between the electroluminescent light source (2) and the electronic component (3) being made by a flexible film (8) having electrically conductive regions (82) and at least one electrically insulating surface (81).
Abstract:
According to an exemplary embodiment of the present invention, a lighting system for communication with a remote control device is provided, which comprises a light emitting element adapted for emitting modulated light to the remote control and for detecting control signals from the remote control. This may provide for a communication between the remote control and the lighting system without the need of an extra sensor or an extra transmitter.
Abstract:
The invention relates to a photo-detector comprising a light sensitive element (101) and a wavelength converter (103) arranged in front of the light sensitive element, the wavelength converter being configured to convert light of a first wavelength into light of a second wavelength and to direct the light of the second wavelength to the light sensitive element. The advantage is that a stable reading across the entire visible spectrum may be provided.
Abstract:
The present invention relates to a device and method for controlling the color point of an LED light source (50). Color point control is a most interesting product feature both for white and colored LED light sources. In known methods for the color control of RGB LED light sources use is made of flux and color sensors. However, there are difficulties with respect to sensing quickly changing ambient light, deeply dimmed colors, coordinating the measurements with the switching of the LEDs, and controlling the color in LED light units comprising a number of independent LED lamps, e.g. segmented wall washers and LCD backlights. It is proposed according to the present invention to control the color of the LED light source (50), using a model-based feed forward approach. Factors relating the parameters controlling the LED currents to the brightness for the different colors (and segments) are stored and used for open loop control. A slow-running procedure continuously measures and updates these factors. Whilst the measurements are e.g. synchronized with the PWM, the procedure itself can run considerably slower and updates the factors asynchronously.
Abstract:
Operating a lighting device by acquiring a target brightness level of at least one solid-state lighting unit, and determining a reference driving current amplitude for obtaining the target brightness level. If the reference driving current amplitude is below an optimum driving current amplitude, the solid-state lighting unit is operated at the optimum driving current amplitude, which is pulse-width modulated to obtain the target brightness level.