Patent application number | Description | Published |
20100176732 | DIRECTION CONTROLLABLE LIGHTING UNIT - A direction controllable lighting unit ( | 07-15-2010 |
20100327754 | ADAPTIVE MODULATION AND DATA EMBEDDING IN LIGHT FOR ADVANCED LIGHTING CONTROL - This invention relates to a method for controlling a light output signal emitted by a set of light sources comprising at least one light source, wherein said light output signal comprises a modulation signal which carries individual information, the method comprising recurrently: remotely detecting the light output signal of said set of light sources; determining at least one quality measure of said remote detection of the light output signal; and adjusting the modulation signal on basis of said at least one quality measure. | 12-30-2010 |
20110022342 | DISTRIBUTED SPECTRUM SENSING - In summary, the invention relates to a device, a system, a method and a computer program for spectrum sensing. A detection procedure for detecting a signal of interest or an event by using a plurality of sensing devices capable of communicating with a central unit is proposed. The sensing devices can compute soft detection metrics and communicate this information to a central unit, where the information may be used to make a final detection decision using a certain specified rule. The signaling overhead of the proposed approach can be of the same order as that of a hard signaling approach. However, the proposed approach may achieve a better detection performance. | 01-27-2011 |
20110043116 | ILLUMINATION SYSTEM AND METHOD FOR PROCESSING LIGHT - Proposed is an illumination system ( | 02-24-2011 |
20120091896 | EFFICIENT ADDRESS ASSIGNMENT IN CODED LIGHTING SYSTEMS - Coded light has been proposed to enable advanced control of light sources and transmit information using light sources. It is based on invisibly embedding of data and identifiers in their light output. Methods, devices and systems configured to efficient assignment of addresses in a coded lighting system, still allowing for unique identification, are proposed. More specifically, the assignment of addresses occurs in two phases, where in the initial phase wide area unique addresses are used, while in the second phase only local area unique addresses are used. Also, methods, devices and systems configured to efficiently distribute a set of addresses over a set of light sources in this second phase, to maximize the performance of the illumination contribution estimation, and positioning, are disclosed. | 04-19-2012 |
20120163826 | CODED LIGHT TRANSMISSION AND RECEPTION - Coded light has been proposed to enable advanced control of light sources and transmit information using light sources. An assignment for the identification frequencies of light sources enables more unique frequencies to be assigned, i.e. more light sources to be uniquely identified in the system. An available frequency band is divided into non-uniform frequency regions and frequencies are selected from a set of uniformly spaced frequencies in the non-uniform frequency regions. A receiver is based on a successive approach and is enabled to analyze higher harmonics of the received light signals. The light contributions are successively estimated group by group. | 06-28-2012 |
20130069540 | Adaptive modulation and data embedding in light for advanced lighting control - Disclosed is a method for controlling a light output signal emitted by a set of light sources comprising at least one light source, wherein said light output signal includes a modulation signal which carries individual information, such that the method includes recurrently:
| 03-21-2013 |
20140042913 | SYSTEM AND METHODS FOR DAYLIGHT-INTEGRATED ILLUMINATION CONTROL - A light detector arranged to determine a daylight contribution and an artificial light contribution to a combined illumination level wherein the artificial light comprises individual light coding modulation. The detector comprises:—a photo-sensor arranged to detect the illumination level at its position, and generate an illumination signal; and—a calculator, connected with the photo-sensor for receiving the illumination signal, and arranged to calculate the daylight contribution and the artificial light contribution and output corresponding daylight and artificial light signals. The calculator comprises:—an electronic filter arranged to prepare the illumination signal for estimation of the daylight and artificial light contributions;—a daylight part and an artificial light part, respectively connected to the electronic filter. The artificial light part comprises an artificial light DC component estimator, and the daylight part comprises a total DC component estimator, and a subtractor connected to the total DC component estimator and to the artificial light DC component estimator, and being arranged to determine the daylight contribution as the difference between their outputs. The artificial light DC component estimator is arranged to include present luminaire dimming level data and modulation depth data regarding the light coding modulation in a basis of its estimation. | 02-13-2014 |
20140072310 | Lighting device and receiver - There is provided a method and corresponding lighting device ( | 03-13-2014 |
20140334825 | PROTOCOLS FOR CODED LIGHT COMMUNICATIONS - Protocols for coded light communication and control in a lighting system wherein each lighting device transmits modulated light during illumination are proposed. When a first source lighting device need to transmit information across the lighting system to a destination lighting device one or more intermediate lighting devices decode received coded light transmissions from the first source lighting device. The one or more intermediate lighting devices superimposes the coded light transmissions from the first source lighting device with coded light transmissions from a second source lighting device in a broadcast. The first source lighting device uses the received broadcast signal from the one or more intermediate lighting devices to retrieve the coded light transmissions from the second source lighting device by canceling stored a priori known signal components. | 11-13-2014 |
20140375217 | VISIBLE LIGHT COMMUNICATIONS USING A REMOTE CONTROL - According to one aspect of the disclosure, a lighting system comprises a remote control unit ( | 12-25-2014 |
20150078743 | Method and device for visible light communication - A method and device for visible light communication is disclosed. The method comprises selecting a first sequence and a second sequence of light intensity frequencies to represent a first symbol and a second symbol, respectively, for embedding data. The method comprises further transmitting a light signal. The light signal comprises time periods in which a light intensity of the light signal is sequentially controlled according to the selected sequence of light intensity frequencies. Thereby, a frequency hopping light signal is generated, in which data may be embedded. The light signal may be generated and transmitted by the device comprising a light emitter. | 03-19-2015 |