Abstract: An outdoor lighting system comprises an outdoor light source, a luminance control device, a detection apparatus, a communication network and a main controlling system. The detection apparatus is configured for detecting a luminance of the light source and generating a corresponding detecting signal associated with the luminance of the light source. The main controlling system receives the detecting signal from the detection apparatus via the communication network, and generates a luminance control signal in responsive to the detecting signal; the luminance control device is configured for receiving the luminance control signal via the communication network and regulating the luminance of the light source according to the luminance control signal.

Abstract: An apparatus and method provides for managing solar power to a LED illumination device such as a street sign so that the power from a power storage device is monitored and variations in applied power to the LED device can be dynamically made to preserve power or increase power as appropriate. A controller may control the power management based on preprogrammed time periods, environmental factors, and solar availability. Historical tracking of available power may provide a basis for computing available power.

Abstract: An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.

Abstract: A lighting system comprising a plurality of light units, wherein said light units are arranged in an array, wherein the light beams of substantially each pair of adjacent light units overlap each other, and wherein the light system comprises a light control means which is arranged to adjust the intensity of each one of said plurality of light units individually, wherein said light control means is further arranged to maintain the total combined luminous flux incident of said plurality of light units on a predefined imaginary flat surface substantially equal when adapting the intensity of the individual light units.

Abstract: A system for controlling solid state lighting comprises a source (1) to supply any one of a range of AC or DC voltages to a plurality of light strings (3, 4, 5). The source (1) includes a power factor correction circuit 14 for controlling the power factor to the system and a separate transformer (15, 16, 17) for each light string (3, 4, 5). The current that can pass through each LED string (3, 4 and 5) is independently limited by each corresponding LED driver circuit (6, 19 and 20). The current through each LED string (3, 4 and 5) can be modified according to a feedback monitor system (18, 21 and 22) that measures parameters such as LED characteristics, forward current, temperature, and LED output intensity/colour.

Abstract: The present invention is an illuminator for CCTV surveillance and security applications that maintains constant optical output from an array of LEDs by employing output compensation, feedback and enhancement. This constant optical output illuminator system enables reliable long-duration low-light imaging and data capture for surveillance and security applications, via an array of LEDs, LED power supply circuitry, and output feedback and compensation circuitry in which a photodetector circuit provides a voltage signal proportional to an amount of light falling on a photosensor and the voltage signal is fed to a drive control circuit for electrical current to the LEDs to achieve a desired optical output as measured by a photosensor voltage setpoint across the photodetector circuit.

Abstract: A solution is provided in which one or more of a plurality of light elements is alternately operated as a light emitting element and a light detecting element. For example, a system can operate a light element as a light detecting element while operating at least one other light element as a light emitting element in order to manage operation of the light elements to generate light having a set of desired attributes, evaluating an operating condition of the other light element(s), and/or the like.

Abstract: A method for setting a color location is provided. The method may include providing n luminous sources of which n-3 luminous sources have been, or are preset; determining a color location difference of the n luminous sources from a desired color location; and setting the 3 luminous sources not preset are set such that the desired color location is achieved.

Abstract: This invention relates to a luminaire comprising an OLED device, where a light detecting function of the OLED device is employed for transmitting light setting commands to the luminaire from a remote position by means of a control light signal, which carries command information. The control light signal has a header portion, which can be recognized by the luminaire and makes it ready to receive a command, and a following control command portion.

Abstract: A method and apparatus is provided for controlling power consuming devices within a user space. The method includes the steps of providing a plurality of power control devices where each power control device of the plurality of power control devices controls a power consuming device within the user space, a base station controlling a power level of the power controlling devices in accordance with a set of parameter provided by a user of the user space, a solar detector detecting a solar input proximate the user space and the base station adjusting a power level of the power control devices in accordance with the detected solar input.

Abstract: An LED lamp power management system and method including an LED lamp having an LED controller 58; a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 reduces power loss in one of the channel switch 62 and the shunt switch 68 when LED lamp electronics power loss (Ploss) exceeds an LED lamp electronics power loss limit (Plim); and each of the channel switches 62 receives a channel switch control signal 63 from the LED controller 58 and each of the shunt switches 68 receives a shunt switch control signal 69 from the LED controller 58.

Abstract: A two way lighting control system with dual illumination sources, including a lighting unit, a photocell, a motion sensor, and at least one light source base. The lighting unit includes two light source loads. The high wattage light source load is the first light source, and the low wattage source load is the second light source. The illumination of the first light source load is greater than the illumination of the second light source load. The first light source load is electrically connected with the motion sensor via the base, and then is further electrically connected with the photocell to form the first circuit loop. The second light source load is electrically connected with the photocell via the base to form the second circuit loop. Thereby, the present invention can satisfy consumers' requirements of providing both high illumination light and low illumination light with energy saving benefit as needed.

Abstract: The invention relates to a method of controlling a lighting system with multiple controllable light sources 3a, 3b and a system therefor. According to a first aspect, influence data of the lighting system are obtained, which data represent the effect of one or more of the light sources 3a, 3b on the illumination of one or more sections of an illuminated environment. In an optimization method, sets of control commands are continuously determined, a predicted light distribution for these control commands is determined from the influence data, and a colorimetric difference between the predicted light distribution and a target light distribution is determined. A plurality of adjustment steps are performed to minimize the colorimetric difference. According to a second aspect, a neural network is trained with the influence data and a set of control commands for controlling the lighting system is determined with the use of the neural network.

Abstract: A lighting system includes a plurality of LED lights having at least two different color LED lights. A controller is coupled to the LED lights for independently controlling the intensity of sets of different color LED lights. A program stored on a storage device is operable on the controller to control the intensity of each of the different sets of different color LED lights to produce light representative of color and intensity changes of outdoor daylight conditions.

Abstract: An LED luminaire is provided with a light emitting module composed of plural kinds of LEDs emitting lights of different colors, a lens unit having a lens for diffusing the mixed-color light from the light emitting module, a light output controller for controlling electric current fed to each of the LEDs, and a light sensor for sensing the light from the light emitting module. The light output controller performs feedback control on the electric current fed to each of the LEDs based upon light levels of the sensed light, so that the light emitted from the light emitting module has desired chromaticity. The lens unit contains a light guide for guiding the light from the lens to the light sensor and can guide the light from the light emitting module to the light sensor with a high efficiency.

Abstract: This invention relates to a luminaire comprising a light source emitting output light, and a detector unit, which is arranged to detect received light emanating from a remote reflection of said output light, wherein the detector unit comprises a first identifier, which is arranged to identify a remotely introduced reflector identifying light coding of the received light. The invention also relates to a method for determining a property of light at a remote position.

Abstract: An illumination brightness and color control system and method therefor are provided. A broadband light source monitor senses and samples a point light source for a luminous intensity signal value. Then, a corrected current value is computed based on a difference between the luminous intensity signal value and a target brightness/color value, and a driving current generated by a light source driver to drive the point light source is adjusted according to the corrected current value.

Abstract: A method of color control for a backlight utilizing colored light emitting diodes (LEDs), the method constituted of: providing a plurality of colored LED strings constituted of at least three different colors; lighting each of the plurality of colored LED strings to provide a backlight; providing a period wherein none of the colored LED strings are lit; obtaining during the provided period when none of the colored LED strings are lit, an indication of an ambient light; obtaining during the provided period when the colored LED strings are lit, an indication of the optical output of the colored LED strings; and controlling the lighting of the provided plurality of colored LED strings responsive to the received indication of ambient light and the received indication of the output of the colored LED strings. Preferably, the method is performed in cooperation with an on-board color sensor.

Abstract: The present invention relates to a solid state lighting system which comprises at least one luminaire controller (208, 203), a plurality of light engines (201, 203; 301, 303) each being coupled to a plurality of light emitting devices (RG, B, A) and a single sensor (206, 306) coupled to each of the at least one luminaire controller (208; 308) for sensing the light emitted by the plurality of light emitting devices. The luminaire controller is adapted to control at least one of the plurality of light engines based on the sensing signal from the sensor (206, 306) such that a feedback control loop is implemented. A synchronization connection (205) is provided between the plurality of light engines (101, 103; 301, 303) to synchronize the plurality of light engines (101, 103; 301, 303).

Abstract: A low-cost, high-reliability, high-luminance light source is provided without the need to provide a spare light source. An LED light source device (1) includes a plurality of LEDs (3); a light-guide optical unit (5) that guides illumination light emitted from the LEDs (3) to an illuminated region; a motor (7) that relatively moves the light-guide optical unit (5) and the LEDs (3); an LED lighting control circuit (33) that drives the LEDs (3) to blink in synchronization with the relative motion effected by the motor (7); a light-level sensor (9) that detects the light level of the illumination light guided to the illuminated region; and a fault determination unit (35) that stops the blinking driving effected by the LED lighting control circuit (33) and continuously lights all of the LEDs (3) when the light level of the illumination light detected by the light-level sensor (9) reaches or falls below a prescribed threshold.

Abstract: A system and method of synchronization protocol for fire alarm strobe systems which has the ability to synchronize the strobe light devices from different manufactures simultaneously.

Abstract: The present invention is directed to a drive apparatus for a backlight unit (20) in which plural LED (Light Emitting Diode) elements are cascade-connected every three primary colors, which comprises a signal generating unit (44) for generating a signal having an arbitrary amplitude, an adjustment unit (50) for adjusting light emission quantities of groups of LED elements (30) on the basis of the signal which has been generated by the signal generating unit (44), a voltage applying unit (41) for applying a predetermined voltage every the groups of LED elements (30), light emission quantity detecting units (33) for detecting quantities of rays of light which have been emitted from the groups of LED elements (30), calorific value detecting units (32) for detecting calorific values emitted from the groups of LED elements in accordance with the voltage which has been applied to the voltage applying unit (41), and a control unit (50) for controlling the signal generating unit (44) on the basis of light emission qua

Abstract: An illumination system comprises at least two light sources (101,102,103) having different emission spectra to one another; a detection circuit (131,132,133) for sensing a light intensity using at least one of the light sources as a photosensor; and driving means (161,162,163) for driving the light source in dependence on the sensed spectral distribution of light. The emission spectrum of a light source with the smallest bandgap overlaps the emission spectrum of a light source with the second-smallest bandgap. The illumination system is possible to measure the intensity of light emitted by the light source with the smallest bandgap by putting the light source with the second-smallest bandgap in detection mode. The illumination system may also sense the spectral distribution of ambient light, to allow the output from the illumination system to be adjusted in dependence on the ambient light.

Abstract: A direction controllable lighting unit (10) and use thereof in a lighting system (40) are described. A lighting unit (10) has means (16) for directing the light emission (22) into different directions. A plurality of light sources (20a, 20b) are mounted on a common body (14). The light sources (20a, 20b) are disposed to emit directed light into different directions. The light is modulated to contain identification codes ‘A’, ‘B’, which are unique. Within the lighting system (40), an optical sensor (46) is arranged in a region illuminated by the lighting unit (10). The optical sensor (46) demodulates the received light according to the identification code. A control unit (44) is connected to the optical sensor (46) and to the lighting unit (10) to control the direction of the lighting unit (10) based on information from the optical sensor (46).

Abstract: A method for operating obstacle or hazard lighting of a wind power plant with a red beacon unit and a white beacon unit is provided. The red beacon unit is operated 24 hours a day and the white beacon unit is switched on and off, depending on the ambient brightness.

Abstract: Perceived output color and intensity (brightness) of light from a three-element red-green-blue (RGB) light emitting diode (LED) or optical combination of three LEDs (red, green and blue) are controlled with three pulse train signals, each having fixed pulse width and voltage amplitude and then increasing or decreasing the frequency (increasing or decreasing the number of pulses over a time period) of these pulse train signals so as to vary the average current through each of the RGB-LEDs. This reduces the level of electro-magnetic interference (EMI) at any one frequency by varying the pulse train energy spectrum over a plurality of frequencies.

Abstract: The present invention relates to a method of controlling the output of a luminaire comprising an array of LEDs emitting light of at least one color. The array has single color LED groups, wherein each group consists of at least one LED. The method comprises the following steps for each LED group:spectrally filtering the light emitted by the LED group by means of a first filter as well as by means of a second filter; detecting the spectrally filtered light from said first and said second filter and generating respective first and second response signals, wherein the levels of said first and second response signals are related to the respective amounts of detected spectrally filtered light; and controlling the light output of said LED group on the basis of said first and second response signals, wherein the filter characteristics of said first and said second filter are at least partly non-overlapping. The invention also relates to a corresponding control system for performing the method.

Abstract: A method of driving a light source includes adjusting a number of duty adjustments of driving signals driving light sources based on a dimming control signal and adjusting each duty ratio of each of the driving signals provided to each of the light sources in accordance with the adjusted number of the duty adjustments.

Abstract: An electrically powered flame simulator comprises at least two light sources, an integrated circuit electrically connected to the light sources for intermittently illuminating at least one of the light sources independently of other light sources such that the light sources together provide the effect of a flickering movement, and a power source for providing power to the integrated circuit. The flame simulator may be mounted in a decorative or ornamental device such as a candle or fire log, or used on decorative clothing, or may be part of a hazard or warning system. One or more solid state light sources may also be used.

Abstract: A method of driving a light source of a light source module including a red light source, a green light source and a blue light source, includes sensing a luminous intensity of the environment; and adjusting a wavelength of light generated from the light source module according to the luminous intensity of the environment.

Abstract: LED lighting fixtures, or luminaires, related components, driver circuit, methods, and software/firmware are described can provide for among other things, ambient environment sensing, thermal self-monitoring, sensor-based power management, communications, and/or programmability. Driver and lighting circuits configured for electrical loads such as series arrangements of light emitting diodes are also described. Embodiments of PFC stages and driver stages can be combined for use as a power supply, and may be configured on a common circuit board. Power factor correction and driver circuits can be combined with one or more lighting elements as a lighting apparatus. Methods of hysteretic power factor correction start-up are also described.

Abstract: A gaming machine includes a main door coupled to a main cabinet and a controller positioned within the main cabinet, wherein the controller includes a wireless transmitter configured to transmit wireless control signals. The gaming machine also includes a display board coupled to the main door, wherein the display board includes a plurality of light devices and a wireless receiver configured to receive the wireless signals from the wireless transmitter, and wherein the wireless signals are representative of control commands for the plurality of light devices.

Abstract: A video display system (100) is provided which comprises a display panel (DP) for displaying a video signal (V), at least one lighting unit (LU) for providing a surround or ambient lighting (LS), a user interface (UI) for receiving external user calibration signals and a lighting control unit (LC) for controlling the color and/or luminance of the lighting unit (LU) in dependence on the calibration signals received by the user interface (UI).

Abstract: A lighting assembly using light emitting diodes provides low leakage current that does not require an external ballast. The lighting assembly can replace a fluorescent tube light while providing a more comfortable and steady light source, consuming less power and with enhanced longevity. The lighting assembly includes a tube, a light emitting diode panel disposed within the tube, a circuit board disposed within the tube, and insulation disposed between the light emitting diode panel and the circuit board. At least a portion of the tube is translucent. The light emitting diode panel includes light emitting diodes, and the circuit board includes a driving circuit for driving the light emitting diodes.

Abstract: An LED-based light tube for use in a conventional fluorescent fixture can feature a housing including a light transmitting portion. At least one electrical connector can be attached to the housing and configured for engagement with the conventional fluorescent fixture. At least one LED can be arranged to produce light in a direction toward the light transmitting portion. A sensor can be operable to detect a brightness level and output a corresponding signal. A controller can be in electrical communication with the at least one electrical connector and operable to control the at least one LED in response to the signal.

Abstract: A light source detection and control system applied to a backlight module is provided. The system includes a liquid crystal display (LCD) panel, a plurality of light guide panels, a plurality of anisotropic transmission media, a photo detector (PD), and a controller. The LCD panel is divided into multiple blocks, each including white or RGB light sources. The light guide panels are disposed on the blocks for collecting and guiding the light emitted by the light sources. The anisotropic transmission media are connected to the light guide panels for transmitting the light emitted by the light sources. The PD is connected to the anisotropic transmission media for receiving the light and detecting the luminance of the light emitted by the light sources. The controller is coupled to the PD for adjusting the luminance or color shift of the light sources according to the luminance detected by the PD.

Abstract: A fluorescent lamp type light emitting apparatus is provided. The light emitting apparatus comprises a cover, a light emitting module, radiation pads, and cap parts. The cover comprises a first cover and a transmissive second cover coupled to the first cover. The light emitting module comprises a plurality of light emitting diodes in the cover. The radiation pads are disposed on the light emitting module. The cap parts comprise electrode terminals at both ends of the cover.

Abstract: The present invention relates to a method for determining drive values for driving a lighting device at a desired brightness and color.

Abstract: A system to allow a fluorescent lamp to be dimmed or otherwise improve color performance of the lamp while maintaining a constant spectral distribution. In one embodiment, the lamp will dim in light output and not shift in color temperature. An LED array is positioned under a fluorescent lamp such that its light injects back into the lamp that part of the color spectrum that diminishes as a fluorescent lamp dims. The LED array is positioned centrally along the underside of the lamp. The light from the LED is never directly visible but shines through the lamp; the lamp acting as a diffuser. The brightness level of the LEDs can be determined as a preset level relative to a predetermined dim setting or can be regulated through an electronic monitoring sensor. The monitoring could evaluate the shift in color spectrum and or intensity and render the appropriate injection of light spectrum to maintain a constant unwavering color temperature.

Abstract: A light reflection surface member (2) is arranged on the bottom surface of a hollow unit case (1), a light emitting surface member (3) is arranged on the upper surface side of the unit case to face the light reflection surface member, and a hollow light guide region (10) is formed by being sandwiched by the light reflection surface member and the light emitting member. On the side surface of the unit case, an LED light source (5) is arranged. The LED light source has many LEDs (7R, 7B, 7G) in rows, and each LED emits single color light of red or green or blue. On two strips of light reflection surface member in the unit case (1), a color sensor is arranged for measuring illuminance of each color light entered the hollow light guide region from the LED light source (5).

Abstract: An illumination system (1) comprises a plurality of lamps (11, 12, 13) for generating light (R, G, B) with mutually different colors; in an embodiment, the lamps are fluorescent lamps. A sensing system (50) comprising a color sensor (51) provides a sensor output signal (Ss) that indicates the color of the light received by the color sensor. The sensing system comprises a light guide arrangement (60) interposed between the lamps and the sensor, which is arranged in a service room (74) shielded from ambient light. Each light guide captures light from one lamp only, and the sensor receives a mixture of the captured lights. The color sensor and light guide are used in a feedback system that corrects for tolerances, lamp aging, ambient temperature etc.

Abstract: An illumination system includes a plurality of illumination devices and a number of sensor blocks. In each of the sensor blocks, an active sensor is provided to detect a moving object traveling within a detection area thereof and plural amplifier circuits is provided to divide a detection signal transmitted from the active sensor into plural frequency bands and for amplifying signal components of the frequency bands. Provided in a one-to-one relationship with the amplifier circuits is plural judgment units that, based on the amplified signal components of the frequency bands provided from the amplifier circuits, judges whether the moving object is travelling at a travel velocity corresponding to any one of the frequency bands. A control unit is also provided to perform a turn-on control on at least one of the illumination devices based on judgment results made by the judgment units.

Abstract: Lighting elements include light emitting diodes mounted on a circuit board with a lens assembly that may be positioned substantially near the light emitting diode to allow light from the light emitting diode to pass through a lens portion of the lens assembly. The lens assembly includes a connecting base piece to detachably connect the lens assembly to the circuit board. A method of connecting a lens to a circuit board may also include placing a lens assembly including the lens over a light emitting diode and detachably connecting the lens to the circuit board by detachably connecting a base piece of the lens assembly to the circuit board.

Abstract: A backlight device (2) for emitting illumination light outward includes white light-emitting diodes (4w) for emitting white light, and red and blue light-emitting diodes (4r, 4b) for emitting red light and blue light, respectively. The backlight device (2) further includes a lighting drive circuit (lighting control portion) (11) for controlling the lighting/driving of each of the light-emitting diodes (4w, 4r, 4b).

Abstract: A method for driving a light source includes providing a first control voltage at a first level to a memory so that the memory performs a writing operation when an external control signal is received by a control voltage generating circuit, providing a second control voltage at a second level to the memory so that the memory prevents the writing operation when the external control signal is not received by the control voltage generating circuit, comparing a reference signal stored in the memory with a sensing signal based on an amount of light outputted from the light source to generate a driving signal, and providing the driving signal to the light source to compensate the amount of light outputted from the light source.

Abstract: An illumination system (1) comprises: —at least one light source (2); —a control system (3) for controlling the light sources, the control system comprising a sensor system (4) with at least one light sensor (5) for sensing ambient light (L1) and for generating a sensor output signal (M) representing the sensed light level, wherein the control system is designed for controlling the light sources in relation to the sensor output signal. The control system automatically calibrates the sensor system. The control system measures the ambient illumination level (MMIN) at a moment of calibration and stores this measured ambient illumination level into a memory (7). The control system, preferably with the light sources in an OFF condition, monitors the ambient illumination level and compares this with the stored value, and automatically performs a calibration procedure when the ambient illumination level reaches a new minimum value lower than the stored value.

Abstract: A luminaire drive circuit (1) comprises an AC to DC power supply (2) delivering DC power to rails (3), and a plurality of LED drive circuits (4) connected across the rails to receive DC power. Each LED drive circuit (4) comprises a plurality of LEDs (7) in series and a voltage and current controller (6) for controlling current through the LEDs and a voltage across the LEDs which is less than the voltage across the rails. In one example, each LED circuit (4) has a dedicated sensor (52) to detect proximity of an illuminated object. This allows control of illumination intensity both for energy efficiency and visual effect. The proximity sensor may be simply a photodiode (52) mounted to detect extent of light reflected from the objects (FIG. 5), thus avoiding need for a self-contained proximity sensor such as one of the ultrasonic type.

Abstract: A system and device for and a method of programming and controlling light fixtures is disclosed. A system in accordance with the present invention includes a stationary controller unit that is electrically coupled to the light fixtures. The stationary controller unit is configured to be remotely programmed with a portable commissioning device to automatically control the lights fixtures. The stationary controller unit and the portable commissioning device include light sensors, micro-computers and transceivers for measuring light levels, running programs, storing data and transmitting data between the stationary controller unit and the portable commissioning device. In operation, target light levels selected with the portable commissioning device and the controller unit is remotely programmed to automatically maintain the target level.

Abstract: A tanning apparatus for radiation treatment for personal care includes at least one gas discharge UV lamp, at least one ballast connected in series with said at least one gas discharge lamp, and at least one incandescent lamp separate from the gas discharge lamp or lamps. The weight of the inductive ballast is reduced in that the incandescent lamp(s) is included in the ballast or ballasts(s).

Abstract: The invention relates to a lamp-holding device (1) which is capable of accommodating at least one light source (2) for emitting light. The lamp-holding device comprises a receiver (6) arranged to receive at least one electromagnetic signal (5) from a wireless controller (3). The lamp-holding device further comprises means (7) for sensing the intensity of said received electromagnetic signal and means (8) for controlling said at least one light source in accordance with said sensed intensity of said received electromagnetic signal. By sensing the intensity of the electromagnetic signal of the wireless controller at the lamp-holding device and controlling the behavior of the light source in such a way that it is dependent on the sensed intensity, the position of the wireless controller directly influences the behavior of the light source.