Abstract: A control device includes: a warm-up determiner which determines, when color calibration of a display device is to be performed, whether a warm-up of a colorimeter is necessary, based on a predetermined condition; a display controller which causes, when the warm-up determiner determines that the warm-up of the colorimeter is necessary, a predetermined image, which indicates an attachment position of the colorimeter onto the display device, to be displayed on the display device; and a warm-up controller which starts, when the colorimeter is determined as being attached at the attachment position, the warm-up of the colorimeter by using the display device.

Abstract: A lighting system has at least one light fixture and a control device. The at least one light fixture has light parameters. The control device is in communication with the at least one light fixture. The control device has a plurality of one-dimensional user setting, a predetermined sequence of light parameters as a function of time, and an adjustment to the predetermined sequence as a function of a selected one-dimensional user setting.

Abstract: A lighting system includes an LED array having a plurality of LED pixels and a power controller. The power controller adjusts a supply voltage for powering the LED pixels based on one or more conditions of the LED array. The power controller may determine the supply voltage based on process data of the LED array. The power controller may adjust the supply voltage based on an operating temperature of the LED pixels and the amplitude of a current driving the LED pixels.

Abstract: Discussed herein are systems, devices, methods, and computer-readable media for reducing a number of undriven or underdriven uLEDs of a uLED die. A method can include identifying, by a controller of a micro light emitting diode (uLED) die, a dynamic series resistance (Rd) or forward voltage (Vf) of a uLED of the uLED die, selecting, by the controller and based on the identified Rd or Vf, a current level (IPWM_0) less than a maximum current level (IPWM_MAX) supplied by a uLED driver coupled to the uLED die, and causing, by the controller, current, at the selected current level, to be supplied to the uLED driver.

Abstract: An apparatus including a display surface for presenting an image of a user; a light emitting portion for using light to convey semantic information to the user; a sensor for measuring the position of the user relative to the light emitting portion; and a control unit to control the light emitting portion based on the measured position of the user relative to the light emitting portion so as to minimize an effect of the light conveying the semantic information provided by the light emitting portion on the presented image of the user.

Abstract: The present invention relates to a method which makes it possible, with low technical outlay, to set a constant wavelength in an LED in such a way that, for a human observer using the naked eye, a constant colour of the LED is set. The present invention further relates to a correspondingly set-up system arrangement and to a computer program product comprising control commands which carry out the method or operate the system arrangement.

Abstract: A voltage regulator having a current limiter for over-current protection is disclosed. The current limiter is powered by a current or currents derived from an output current. In a no-load condition, in which the output current is zero, the current or currents powering the current limiter may be zero. As the output current increases, however, the current or currents powering the current limiter may grow in proportion. Thus, the current limiter can have zero quiescent current in a no-load condition but may be powered to protect the voltage regulator in a high-current condition.

Abstract: A method for setting a display white point comprises displaying images with a display including at least a first light source and a second light source. The first light source is configured to emit light having a first color and having a first temperature-dependent luminance change. The second light source is configured to emit light having a second color and having a second temperature-dependent luminance change. An internal display temperature is measured. Based on the internal display temperature being a first temperature, a first target white point is set to prioritize color accuracy. Based on the internal display temperature being a second temperature, greater than the first temperature, a second target white point is set to prioritize luminance output.

Abstract: This lighting circuit comprises a current source and a thermal sensing element. The thermal sensing element senses the temperature of a semiconductor light source. The current source generates a drive current that shows a positive correlation with the temperature when the temperature is in a normal range and that shows a negative correlation with the temperature when the temperature falls within a temperature range higher than the normal range.

Abstract: A current limiting circuit includes: a gain calculation circuit which calculates a screen power value based on pixel values and calculates a gain based on the screen power value; and a gain multiplication circuit which multiplies the pixel values by the gain, and when a maximum value of the pixel values exceeds a first threshold value, the gain calculation circuit calculates the screen power value by use of a common pixel value greater than or equal to the maximum value instead of the pixel values, and when the screen power value exceeds a control target power value, the gain calculation circuit sets the gain to a ratio of the control target power value with respect to the screen power value, and when the screen power value is less than or equal to the control target power value, the gain calculation circuit sets the gain to 1.

Abstract: An automation device, having an input for receiving input signals and/or an output for outputting output signals of a process, and an electronic data processing unit, which is adapted to run an application program during operation of the automation device and to process data contained in the input and/or output signals by means of a program function, characterized in that in a digital program memory, a plurality of program functions is stored separately to the application program, which are each uniquely addressable via a function pointer, wherein during operation of the automation device, based on a predetermined function selection, the application program is configured to determine the function pointer of the program function corresponding to the predetermined function selection from a functions reference list stored in a digital data memory and, by means of the determined function pointer, to run the program function corresponding to the predetermined function selection for processing the data contained in

Abstract: A light fixture includes a housing having a first side and a second side opposite the first side. The light fixture further includes a first light board coupled to the first side. The first light board has at least one light emitting element emitting a first light output in a first direction. The light fixture further includes a second light board coupled to the second side. The second light board has at least one light emitting element emitting a second light output in a second direction. The light fixture further includes a first driver supported by the housing and in electrical communication with the first light board. The first driver is operable to control the first light output. The light fixture further includes a second driver supported by the housing and in electrical communication with the second light board. The second driver is operable to control the second light output.

Abstract: An illumination lighting apparatus is configured to light a plurality of light-emitting elements connected in series to each other. The illumination lighting apparatus includes one photosensor and a detector. The one photosensor is configured to detect light emitted from the plurality of light-emitting elements. The detector is configured to perform detection of a light emission defect on the plurality of light-emitting elements based on the light detected by the one photosensor. Moreover, the detector performs the detection process at an initial stage of lighting of the plurality of light-emitting elements.

Abstract: A sensor device includes a two-pin current interface including an input pin configured to draw an input current and an output pin configured to output an output current, a sensor configured to generate a measurement signal, and a current modulator configured to generate a current pulse as the output current such that the output current toggles between at least two main current states based on the measurement signal. The current modulator is configured to modulate the output current such that the output current is increased, to a first current level greater than the at least two main current states, at an initial phase of the current pulse for a first duration, and to modulate the output current such that the output current is decreased, to a second level less than the at least two main current states, at a terminal phase of the current pulse for a second duration.

Abstract: Provided is a reactor having a coil including a winding portion; a magnetic core including an inner core portion and an outer core portion; an inner resin portion with which a space between the winding portion and the inner core portion is filled; and an end surface interposed member is interposed between an end surface of the winding portion and the outer core portion and includes a through hole into which the inner core portion is inserted and a resin filling hole communicating with an interior of the winding portion between the winding portion and the outer core portion. The outer core portion includes at least one recessed portion on the circumferential edge portion of the inner end surface opposing the end surface of the inner core portion, and the recessed portion is recessed inward with respect to the end surface of the inner core portion.

Abstract: In some examples, a method may be performed through light adjustment circuitry of a server that includes a panel light. The method may include identifying a server version of the server from a hardware configuration detected for the server and adjusting a light color of the panel light to account for a lighting variance characteristic of the server version.

Abstract: An LED lighting system includes a luminescent unit driven by a rectified AC voltage, a dimmer switch configured to adjust a duty cycle of a system current, and a bleeder circuit. The bleeder circuit includes a first current source, a second current source, a third current source, a current-sensing element for providing a first feedback voltage associated with the system current, a capacitor, and a control unit. The control unit is configured to activate the first current source and deactivate the second current source for charging the capacitor when the system current exceeds a predetermined threshold, deactivate the first current source and activate the second current source for discharging the capacitor when the system current does not exceed the predetermined threshold, and deactivate the third current source to stop supplying the bleeder current according to a second feedback voltage established across the capacitor.

Abstract: An image apparatus may be configured to calculate a depth of an object relative to the image apparatus. The image apparatus may include an image sensor that may capture a plurality of images of the object. Depth calculation may include calculating a binocular disparity using the plurality of images, measuring a local temperature value from at least one temperature sensor, correcting a focal length of at least a portion of the image apparatus according to the measured local temperature value, and calculating a depth of the object using the binocular disparity and the corrected focal length. The corrected focal length may be determined based on a focal length variation value. The focal length variation value may be determined based on performing contrast autofocus on one or more captured images and the local temperature value.

Abstract: An LED lighting system includes a luminescent unit driven by a rectified AC voltage, a dimmer switch configured to adjusting a duty cycle of a system current, and a bleeder circuit. The bleeder circuit includes a first current source, a second current source, a third current source, a current-sensing element for providing a first feedback voltage associated with the system current, a capacitor, and a control unit. The control unit is configured to activate the first current source and deactivate the second current source for charging the capacitor when the system current exceeds a predetermined threshold, deactivate the first current source and activate the second current source for discharging the capacitor when the system current does not exceed the predetermined threshold, and deactivate the third current source to stop supplying the bleeder current according to a second feedback voltage established across the capacitor.

Abstract: In one example, a method includes determining, by a temperature sensor, a temperature of a device that controls an amount of current flowing to a load, and determining, based on the temperature of the device, a threshold current. The method also includes, in response to determining that the amount of current flowing to the load is greater than the threshold current, adjusting the amount of current flowing to the load.

Abstract: The invention relates to a lighting system (1) comprising a lighting device (6) having a first USB-PD connector and a power providing unit, which is preferentially a component of a power providing device (4) and which is operable in different operational modes. A second USB-PD connector is electrically connected with the power providing unit and adapted to be connected with the first USB-PD connector for generating a USB-PD connection (5) via which power and optionally also data are receivable by the lighting device. A connection feature value being indicative of a feature of the connection is determined and the operational mode of the power providing unit is controlled depending on the determined connection feature value. This allows for a reaction on the current connection situation. For instance, if the connection feature value indicates a relatively low thermal coupling, the power providing unit may provide less power.

Abstract: A method for increasing the luminous intensity of an ultraviolet light emitting diode includes heating an ultraviolet light emitting diode to a working temperature, and supplying electricity to the ultraviolet light emitting diode at the working temperature to make the ultraviolet light emitting diode emit ultraviolet light. An apparatus for increasing the luminous intensity of an ultraviolet light emitting diode includes a substrate, an ultraviolet light emitting diode mounted on the substrate, an electric heater mounted on the substrate, a temperature sensor, and a controller electrically connected to the ultraviolet light emitting diode, the electric heater, and the temperature sensor. The controller can heat the ultraviolet light emitting diode through the substrate.

Abstract: A dynamically optimized ballast includes a ballast and a circuit board as main components combined together. Said circuit board is provided with a microcontroller, a timer and a current-switching device; wherein said microcontroller is provided with a timed step-up module which can start the timer and maintain a low current output to HID lamp at the time the circuit board is powered, and the timer will transmit a signal to the microcontroller to start the current-switching device and automatically switch to a high current output to HID lamp when a preset time of the timer has been reached. So that this invention can protect HID lamp and extend the service life of HID lamp, even the HID lamp pulsing for a long time, the power source repeated power supply and power out will not cause great damage to HID lamp and it will not be out of function. Besides, this invention enables user to reduce the brightness of HID lamp to reduce the loss of electric power and the deterioration of HID lamp.

Abstract: Devices, systems, software, and methods for control of light emitting diodes (LEDs) via an LED driver circuit that receives an input signal from a power source and generates an output signal to power at least one LED element. The LED driver comprises a driver housing, an opening in the driver housing configured for receiving a removable plug-in module, and a plug-in interface configured for providing electrical connection between the plug-in module and the LED driver. The plug-in module comprises an external memory storing configuration information. The LED driver further comprises at least one driver circuit disposed within the driver housing and comprising an internal memory and a microcontroller. The microcontroller is configured for receiving the configuration information from the external memory of the plug-in module and regulating the output signal provided to the at least one LED element based on the configuration information.

Abstract: Proposed is a light module (110) comprising at least two primary light sources (111,112,113) capable of emitting a primary color light. This allows the light module to emit light having intensity (Y) and color coordinates (x,y) through additive color mixing of the constituent primary colors. The light module further comprises an modulator (115) capable of modulating the primary light sources enabling embedment of data in the light emitted. The modulator (115) is arranged to modulate the color coordinates of the light emitted for embedding the data. This is especially advantageous as the sensitivity of the human eye to changes in color is lower than to changes in intensity. The invention thus advantageously allows embedding the data into the light emitted from the light modules (110) of an illumination system (100) without reducing the performance of its primary function as an aid to human vision.

Abstract: An actuating device comprises an LED actuating module. Said LED actuating module comprises a micro-programmed control unit (MCU), an actuator, a VF-value detection module, a PN-junction temperature acquisition module and an LED lamp unit. The MCU determines the current value matched with the LED lamp unit based on the VF value detected by the VF-value detection module and the temperature value detected by the PN-junction temperature acquisition module, and then determines the width of the PWM pulse output to the actuator according to the current value, and the actuator actuates an LED to operate at the matched current value.

Abstract: A system and method of thermal management for an LED are provided. A method provided by the system includes (a) providing a forward drive current to power the LED, the forward drive current having a first LED operating current component; (b) detecting the first LED operating current component; (c) sensing a first thermal operating point of the LED; and (d) generating a temperature signal indicative of the first thermal operating point. The method also includes (e) determining a thermal operating range of the LED; (f) determining that the first thermal operating point of the LED is outside the thermal operating range of the LED; and (g) generating a first control setting configured to cause the LED to be driven at a second operating point, the second thermal operating point within the thermal operating range.

Abstract: A method of operating a lighting fixture comprising a plurality of discrete illumination sources of distinguishably different color coordinates comprises determining target color coordinates and luminous flux at which to operate the lighting fixture, determining input electrical power values for each of the plurality of discrete illumination sources that substantially produce the target color coordinates and luminous flux by referencing a calibration data lookup table having calibration data based on measurements of the plurality of discrete illumination sources, determining a color mixing zone defined by three distinguishably different color coordinates of the plurality of discrete illumination sources within which the target color coordinates lie according to the calibration data, determining luminous flux ratios for each of the plurality of discrete illumination sources having one of the three distinguishably different color coordinates defining the color mixing zone that substantially produces the target

Abstract: An appliance and method for variably controlling a drive signal to a light emitting device of the appliance based on a temperature value indicative of a temperature within a chamber of the appliance is provided. The light emitting device can be included in a display or disposed within a chamber of the appliance to provide illumination. The light intensity level of the light emitting device can be controlled based on the temperature value indicative of a temperature within the chamber. The temperature value indicative of a temperature within the chamber can be a value detected within the chamber, a value detected on a surface of the chamber, or a value that anticipates the temperature within the chamber. The light intensity can be controlled with a driving signal to the light emitting device. For instance, the light intensity can be controlled using pulse width modulation of the driving signal.

Abstract: A liquid crystal display (LCD) device having an LCD panel with a plurality of pixels is disclosed. The LCD device includes gate and data driving circuits to provide a gate pulse and a data voltage to the pixels, respectively, and a timing controller to control the gate and data driving circuits. The LCD device also includes a backlight unit to provide light to the liquid crystal panel. The backlight unit includes a light source having at least one LED channel, a driving voltage generator to supply a driving voltage to the LED channel, and an LED driver to supply a conditional pulse width and amplitude modulation (CPWAM) signal to the LED channel. The CPWAM signal has a pulse with an amplitude and a width that are both variable from one period of a predetermined length to another period of the predetermined length.

Abstract: A system and method for operating one or more light emitting devices is disclosed. In one example, the light emitting devices may be deactivated in response to a rate of temperature rise of the light emitting devices.

Abstract: A projector includes an optical engine unit including a light source unit configured to emit light, a light modulating unit configured to modulate, according to image information, the light emitted from the light source unit, and a projecting unit configured to project the light modulated by the light modulating unit, a connecting unit connectable to a bulb socket, a power supply unit configured to supply electric power received from the connecting unit to the optical engine unit, and a cooling unit arranged between the connecting unit and the optical engine unit and configured to circulate the air to cool the power supply unit and the optical engine unit.

Abstract: A controller circuit is configured to adjust the number of light-emitting diodes that a current flows from a rectifier circuit through so that: the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes increases according to a value of a pulsating voltage during a time period that the value of the pulsating voltage increases; and the number of light-emitting diodes, which are lit, of the plurality of light-emitting diodes decreases according to the value of the pulsating voltage during a time period that the value of the pulsating voltage decreases. Light-emitting diodes, which start to emit light by a higher voltage value, of the plurality of light-emitting diodes are disposed at a position nearer to an outside of a mounting region of a substrate than light-emitting diodes, which start to emit light by a lower voltage value, of the plurality of light-emitting diodes.

Abstract: An active corrosion protection circuit for a brake disc-pad unit of a motor vehicle includes one of a metal disc and a pad adapted to selectively block the disc. A direct electric voltage source and an electric conductor connectable to the electric voltage source and one of the disc and the pad forms an electric circuit causing a monopolar current flux between the disc and the pad when the pad blocks the disc so that the action of the current is localized in a contact zone between the disc and the pad.

Abstract: A method for operating a LED lighting system at a target output color is provided. The LED system includes a color sensor and three or more LED emitters each operable at a controllable emitter drive setting. The method provides at least one calibration matrix defining a relationship between measurements obtained from the color sensor, represented by sensor color point coordinates, and absolute color point coordinates in an absolute color space. In some embodiments, a calibration matrix defining a non-linear relationship between the two color spaces is provided. In other embodiments, individual calibration matrices are provided for each LED emitter.

Abstract: Thermally managing at least one light-emitting diode (LED) receiving an operating current and/or an operating voltage and being operable at an operating temperature includes determining a current thermal operating point of the LED, obtaining a thermal operating range of the LED, and calculating a new operating point of the LED based on the current thermal operating point and the thermal operating range, wherein the new operating point is within the thermal operating range. A control signal is generated that adjusts power delivered to the LED to cause the LED to operate at the new operating point. Detection of the operating temperature of the LED may be based on the magnitude of a current pulse superimposed on the operating current provided to the LED and the magnitude of the voltage pulse across the LED resulting from the applied current pulse superimposed on the operating current.

Abstract: A lighting device capable of generating warm or neutral white light using blue light-emitting diodes (“LEDs”), red LEDs, and/or luminescent material that responds to blue LED emission is disclosed. The lighting device includes multiple first solid-state light-emitting structures (“SLSs”), second SLSs, and balancing resistor element. The first SLS such as a string of blue LED dies connected in series is able to convert electrical energy to blue optical light, which is partially turned into longer wavelength emission by the luminescent material. The second SLS such as a red LED die is configured to convert electrical energy to red optical light, wherein the second SLSs are connected in series. While the first SLSs and second SLSs are coupled in parallel, the balancing resistor element provides load balance for current redistribution between the first and second SLSs in response to fluctuation of operating temperature.

Abstract: In various embodiments, a module for providing thermal fold-back protection to an illumination device includes a housing, at least one temperature sensor, and thermal fold-back circuitry.

Abstract: An adjustable LED lighting system may allow for a variable lumen output, an estimation of remaining life expectancy, and/or control of lighting intensity, color temperature, and/or wavelength distribution. An LED lighting system may be capable of mimicking externally monitored, remote controlled, pre-defined, user-selected, or other lighting conditions. An LED lighting system may allow for a variable lumen output by monitoring a temperature associated with one or more LEDs and increasing or decreasing current flow to maintain the monitored temperature below a maximum temperature. The remaining life may be estimated based on historical runtime and temperature data.

Abstract: A semiconductor lighting apparatus includes a plurality of semiconductor light emitting devices for outputting light having respective colors, a projector for synthesizing output light of the semiconductor light emitting devices and outputting synthesized light, and a calculating portion. The calculating portion controls a driving current to be supplied to the semiconductor light emitting devices in such a manner that a light quantity detected by optical sensors approximates to a predetermined target light quantity, and calculates a target temperature of the semiconductor light emitting devices to control temperature regulating portions in such a manner that a temperature detected by temperature sensors approximates to the target temperature.

Abstract: A bleed circuit is applied to a transformer based on a bleed-on time and a bleed-off time determined by monitoring an output voltage waveform of the transformer.

Abstract: An adjustable power supply (1) for light emitting diode arrangements (11), with the power supply (1) being dimensioned for a power class. The power supply (1) has an adjustable current source (3) and an adjustable power limitation (4), and the power limitation (4) is adjustable within the limits of the power class. The power supply (1) further has a control component (5) that is suitable for running an operating program (8). This operating program (8) uses, as its input parameters (7), the number of light emitting diodes (13) to be controlled and their method of connection and, from these parameters, it calculates the required current and the required power, according to which the current source (3) and the power limitation (4) are adjusted and regulated.

Abstract: A control system is disclosed for determining an actual temperature of a light emitting diode. The control system uses conductor that supply power to the light emitting diode to supply a pulse to the light emitting diode. The pulse is determined along with a reaction caused by the pulse and the information gained is used in determination of the light emitting diode die temperature which can then be used in controlling current to the light emitting diode to control the temperature of the light emitting diode.

Abstract: A control system for a feedback controlled LED driving circuit, which includes a valley detect regulator unit and a control and feedback unit. The valley detect regulator unit detects a sine-like DC voltage input by a rectification unit, and stores the electric energy in the storage capacitor when the input voltage is lower than a preset valley voltage. The stored electric energy converted into the system required voltage by a system power supply unit. The control and feedback unit electrically connect to the feedback controlled LED driving circuit, providing PFC, step dimming or color temperature adjustment for driving the LED light-emitting element and detecting a feedback signal of the LED driver circuit for controlling an output current of the LED driver circuit or providing protective measures.

Abstract: The present invention discloses an overcurrent protection circuit for a light source driving module and a related backlight module. The overcurrent protection circuit includes an average value overcurrent protection circuit for detecting an average voltage at a node where the switch is connected to the detection resistor and generating the turning-off signal to turn off the switch when the average voltage is larger or equal to a threshold average voltage, wherein the average voltage is formed by an average current of the switch. Through the above-mentioned mechanism, the present invention can prevent the working power of a power device from being larger than its rated power. Therefore, it also prevents the power device from catching a fire due to a potential high temperature.

Abstract: A light control system and a light control method thereof are disclosed. The light control system is used for controlling a light-emitting device. The light control system includes an ambient status sensing module, a storage module, a controlling module, and a driver module. The ambient status sensing module is used for sensing an ambient state to generate an ambient state value. The storage module has a database for storing a plurality of parameter values, wherein the plurality of parameter values are corresponded to a plurality of ambient state values. The controlling module is used for searching the plurality of parameter values stored within the database according to the ambient state value, so as to generating a controlling signal. The driver module is used for driving the light-emitting device according to the control signal.

Abstract: A preferred embodiment relates to controlling the amount of backlight power in an electronic display to account for the temperature in the backlight cavity. Another embodiment relates to a system for controlling the amount of backlight based on both the temperature of the backlight and the amount of ambient light.

Abstract: An illuminating apparatus includes a drive circuit that generates a drive current, and an organic light emitting panel that receives the drive current and that emits light. The drive circuit is capable of controlling a color temperature of the emitted light from the organic light emitting panel by controlling a current strength of the drive current and is capable of controlling a brightness of the emitted light according to a pulse width of the drive current.

Abstract: The present invention relates to a method for controlling the illumination system in a temperature controlled environment, and to a control system for a temperature controlled environment having an illumination system. More specifically, the invention relates to a method wherein output of the illumination system causes a temperature response in the temperature controlled environment, the temperature response being detected by a sensor, the method comprising regulating the temperature adaptively based on the output of the illumination system and the associated temperature response.

Abstract: A method and illumination device are provided for interference-resistant compensation in light emitting diode (LED) illumination devices. In one embodiment, the method includes bringing to a level insufficient to produce illumination the respective drive current of all except one of multiple emission LED elements for the duration of a first measurement interval and a later-occurring second measurement interval. The first and second measurement intervals are within respective first and second series of measurement intervals interspersed with periods of illumination, and the first and second series of measurement intervals are separated by respective first and second offsets from a timing reference. An embodiment of an illumination device includes multiple emission LED elements, one or more photodetectors, and a lamp control circuit, where the lamp control circuit is adapted to perform steps of the method.