Abstract: Provided are a circuit unit for a lamp and the lamp including the circuit unit. The circuit unit for the lamp may include: a first power stage receiving a first power signal from an Alternating Current (AC) power supply, performing an Alternating Current—Direct Current (AC-DC) conversion for the first power signal to generate a second power signal and performing a dimming signal conversion for the first power signal to generate a first dimming signal, and a second power stage connected with the first power stage to receive the second power signal output from the first power stage, herein, the second power stage adjusts the second power signal based on at least the first dimming signal, in this way a third power signal is generated, and the second power stage provides a light-emitting unit of the lamp with the third power signal to drive the light-emitting unit.

Abstract: The present application discloses a backlight module and a display device, backlight module includes a substrate, a plurality of light sources, a plurality of barrier wall units and a light adjusting layer. The substrate includes a plurality of function regions and a plurality of non-function regions. Each of the function regions includes at least one light source. The barrier wall units are disposed in non-function regions. The light adjusting layer includes a plurality of patterned light adjusting units disposed to correspond to the function regions. The patterned light adjusting units with the barrier wall units can improve entire light emission brightness of the backlight module to achieve even light emission of an entire surface.

Abstract: Disclosed is a BRCT clamping absorption circuit with short circuit protection, which relates to the technical field of short-circuit protection, includes a load module, a short-circuit detection module, a short-circuit protection module, a spike absorption module, a rectifying module, a clamping module and a main control module, wherein, the spike absorption module is connected with the load module, the rectifying module is connected with the spike absorption module, and the clamping module is connected with the rectifying module to form a clamping absorption protection for a spike voltage; the main control module is connected with the short-circuit detection module, and is used for controlling the on-off of a load regulator according to the short-circuit signal.

Abstract: A method suitable for use by a time-of-flight (TOF) imaging system (500), wherein the system emits illumination in multiple configurations, each configuration having a different spatially-varying intensity over a field of view of an image sensor (512), the method comprising: moving an actuation mechanism (506) to change the illumination via a first sequence of configurations from a first configuration (A) to a final configuration (B); moving the actuation mechanism (506) to subsequently change the illumination via a second sequence of configurations from the final configuration to the first configuration or a second configuration; and obtaining a set of data from the image sensor (512) for each of the configurations (A, B) in the first and second sequences, thereby obtaining two sets of data for each configuration that are suitable for producing two depth image frames, wherein the two sets of data corresponding to the final configuration are consecutively obtained from the first and second sequences.

Abstract: An overhead lighting fixture containing both visible light sources and UV light sources is disclosed herein. UV light can sanitize/disinfect the surrounding environment after the environment over a period of about 30-45 minutes. In this way, viruses, germs, bacteria, mold, and the like can be destroyed to clean the air and/or surfaces (e.g., furniture). Accordingly, embodiments of the present invention provide a controllable UV lighting assembly that can produce UV light to sanitize/disinfect an area and can be automatically disabled to prevent UV light exposure to those in the area using a motion sensor. The lighting assembly can produce visible light while the UV light source is disabled. According to some embodiments, the duration of UV light production is controlled by a timer for power savings.

Abstract: Apparatus and methods for lighting. The apparatus may include a power supply. The apparatus may include a controller. The controller may be configured to receive power from the power supply. The controller may be configured to receive a dimming signal generated external to the controller. The controller may be configured to receive from a user selection that includes a CCT partition set-point. The controller may be configured to transmit to a light source lighting power. The lighting power may correspond to the dimming signal. The lighting power may correspond to the CCT partition set-point. The light source may include a high correlated color temperature (“CCT”) LED. The light source may include a low CCT LED. The CCT partition set-point may correspond to a selected value of a partition of power between the high CCT LED and the low CCT LED.

Abstract: A lighting system uses AC power lines to distribute both power and control signalling from a Powerline Communication (PLC) control transmitter to a number of lighting modules. Each lighting module has PLC communication and digital control circuitry for operating a DC lighting element. Power is fed from the AC power lines to a AC/DC power via electrical filtering which substantially blocks absorption of signals in the PLC control signal band, allowing PLC control signals greater range along the AC power lines. Each lighting module may be adapted to ignore, after receiving a first command from the PLC control transmitter, subsequent commands from the PLC control transmitter for a period of time. The period of time may be signalled from the PLC control transmitter or determined by each lighting module. In this period the lighting module may repeat a previously received command or send other traffic over PLC.

Abstract: An LED lighting device is disclosed. The example LED lighting device includes at least one LED circuit having at least two LEDs, where an LED of the at least two LEDs is configured to emit a different color temperature of white light than at least one other LED of the at least two LEDs. The example LED lighting device also includes a switch directly connected to the at least one LED circuit and configured to be manually switched by a user to change the color temperature of white light that is emitted from the at least one LED circuit. Switching the switch changes the color temperature of light emitted from the at least one LED circuit by dimming or increasing a brightness of the LED that is configured to emit the different color temperature of white light than the at least one other LED of the at least two LEDs.

Abstract: A Light Emitting Diode, LED, based current splitter for splitting an LED current between a plurality of LED channels, wherein said current splitter comprises at least two in series connected LED circuits, wherein each LED circuit comprises a first branch (B1.1, B2.1) comprising at least one LED, a second branch (B1.2, B2.2) connected in parallel over said first branch (B1.1, B2.1) and comprising at least one LED and a branch switch (W1, W3) connected in series with said at least one LED, wherein a forward voltage of said at least one LED in said second branch (B1.2, B2.2) is lower than a forward voltage of said at least one LED in said first branch (B1.1, B2.1) and a third branch (B1.3, B2.3) connected in parallel over said first and second branch (B1.2, B2.2) and comprising a shunt switch (W2, W4) for shunting said first branch (B1.1, B2.1) and said second branch (B1.2, B2.2).

Abstract: A device for reducing jitter of a light source under low brightness is provided. A first end of the switch is for inputting a voltage, and a second end thereof is connected to one end of the inductor. The other end of the inductor is connected to the LED light source. The current control module is connected to the second end of the switch and the first end of the inductor, and a second end of the current control module is grounded. The current acquisition module is used for detecting a current and connected to the signal control module, and sends a current signal into the signal control module according to the current detected. The signal control module is connected to the switch and used for controlling the switch to be disconnected or connected according to the received current signal or a pre-set time threshold.

Abstract: A circuit for driving a light-emitting diode (LED) load and a direct current to direct current (DC-DC) converter includes a first sampling sub-circuit, a driving circuit. The first sampling sub-circuit is configured to generate a current signal representing a load current of the LED load. The driving circuit is configured to receive a brightness adjustment signal and a frequency adjustment signal; generate a first control signal, based on the current signal and the brightness adjustment signal, for controlling an output current of the DC-DC converter; and generate a second control signal, based on the frequency adjustment signal, for controlling a switching frequency of the LED load.

Abstract: An intelligent lighting device control system includes a plurality of lighting devices and an intelligent lighting device controller. The intelligent lighting device controller includes a detecting module, a main power source module and an intelligent control module. The detecting module has a detecting circuit. The main power source module includes a plurality of first electrode connectors and a common electrode connector. The first electrode connectors are connected to the detecting circuit and connected to the first electrodes of the lighting devices via the detecting circuit. The common second electrode connector is connected to the second electrodes of the lighting devices and outputs an electricity signal to drive the lighting devices, such that the detecting circuit generates a plurality of detecting signals. The intelligent control module generates a feedback signal according to the detecting signals and the main power source module adjusts the electricity signal according to the feedback signal.

Abstract: A method and system for controlling illumination according to eye safety standards. The method includes a processor retrieving from a memory of an illumination module, device information indicative of properties of the illumination module. The device information includes a plurality of parameters of an illumination element of the illumination module, and a maximum constant for the illumination element. The maximum constant is associated with a desired eye safety standard and is also indicative of a relationship between at least two parameters of the illumination element. The method further includes receiving, from a user, a desired parameter value for one of the parameters of the plurality of parameters. The processor determines a test constant from the desired parameter value, and the processor compares the test constant and maximum constant to determine if the desired parameter value is an acceptable value.

Abstract: A lighting device including an LED light source, wherein the LED light source includes a first LED strand for generating a first light with a first correlated color temperature and a second LED strand for generating a second light with a second color temperature different from the first color temperature. The lighting device further comprises control electronics with a controllable LED driver for driving the LED light source, wherein the control electronics comprise a switch for switching between the first LED strand and the second LED strand so that either the first LED strand or the second LED strand is activated depending on the switch position. A lighting system comprising the lighting device is further disclosed.

Abstract: A powerline communication control system for controlling a lighting unit, such as an LED lighting unit, including a master controller for receiving lighting unit control inputs from a lighting controller and generating corresponding lighting unit command outputs in a lighting system command format and transmission mode and superimposing the lighting unit command outputs onto the power distribution system and at least one lighting slave unit for receiving the lighting command signal, separating the lighting command signal from the power signal and for providing lighting unit control commands to the at least one lighting unit to control illumination thereof, entirely within a modem embedded into a microcontroller.

Abstract: Provided is a programmable light source output control device. A light source output control device includes electronic fuses, a power stage configured to receive external power, generate actuating power according to the external power and a state of each of the electronic fuses, and supply the actuating power to a light source, and a setting circuit configured to set the state of each of the electronic fuses.

Abstract: Disclosed are apparatus for controlling a lamp and a method thereof. The apparatus for controlling a lamp includes an information collection device that receives light amount information and temperature information of LED chips, which correspond to a plurality of LED boards, respectively, from the plurality of LED boards through one port, and a controller that controls a driving current for driving the LED chip based on the light amount information of the LED chip or the temperature information of the LED chip.

Abstract: A power receiver apparatus is movable under water. The power receiver apparatus includes: a power receiver device configured to receive power wirelessly transmitted from a power transmitter apparatus; a power supply device including a storage battery and configured to charge the storage battery based on received power received by the power receiver device; a first sensor configured to detect a rectified voltage value rectified based on the received power; a second sensor configured to detect a charging current value to the storage battery charged by the power supply device; a processor configured to determine a power transmission voltage value corresponding to the power wirelessly transmitted from the power transmitter apparatus based on the rectified voltage value and the charging current value; and a communication device configured to transmit the power transmission voltage value determined by the processor to the power transmitter apparatus.

Abstract: An LED light with an LED module which has one or more LEDs and an LED driver for power supply to the LEDs. The LED module is at least partially coated with a photoluminescent phosphor, which is configured for absorption of light energy from the LEDs and time-delayed emission of the stored light energy, and the LED driver has at least one electronic component for smoothing the current to be output to the LEDs.

Abstract: A horticultural luminaire includes a first and second horticultural light sources to provide growth lighting to a plant at a first and second wavelengths. A control unit provides first lighting control signals to the first horticultural light source to modulate the first growth lighting and provides second lighting control signals to the second horticultural light source to modulate the second growth lighting. A LiDAR sensor is connected to the lighting control unit to receive the first and second control signals, and having optics to detect reflected first and second growth lighting to determine the distance from plant to sensor and a biometric property of the plant from the received first and second control signals and detected first and second reflected second growth lighting. In some implementations the LiDAR sensor and first and second horticultural light sources are integrated into the horticultural luminaire.

Abstract: An overhead lighting fixture containing both visible light sources and UV light sources is disclosed herein. UV light can sanitize/disinfect the surrounding environment after the environment over a period of about 30-45 minutes. In this way, viruses, germs, bacteria, mold, and the like can be destroyed to clean the air and/or surfaces (e.g., furniture). Accordingly, embodiments of the present invention provide a controllable UV lighting assembly that can produce UV light to sanitize/disinfect an area and can be automatically disabled to prevent UV light exposure to those in the area using a motion sensor. The lighting assembly can produce visible light while the UV light source is disabled. According to some embodiments, the duration of UV light production is controlled by a timer for power savings.

Abstract: A dimming circuit for dimming a current flowing through a light emitting device, having: a multi-function pin, configured to receive a dimming signal; wherein when the dimming signal is an analog voltage signal, an amplitude of the current flowing through the light emitting device is regulated based on the dimming signal; when the dimming signal is a pulse signal and a frequency of the dimming signal is in a first frequency range, a duty cycle of the current flowing through the light emitting device is regulated based on the dimming signal; and when the dimming signal is the pulse signal and the frequency of the dimming signal is in a second frequency range, the amplitude of the current flowing through the light emitting device is regulated based on the dimming signal.

Abstract: The present disclosure provides methods and structures for controlling characteristics of light being projected from a light source. In one embodiment, the method includes selecting a color setting of light to be projected by a light engine having at least one light emitting diode; and monitoring temperature of the light engine with a thermistor. The changes in resistance measurements taken from the thermistor are correlated to changes in the temperature of the light engine. The method for controlling characteristics of light being projected from the light source may further include setting characteristics of the electrical signal to energize the light emitting diodes of the light engine to provide the color setting selected at the temperature of the light engine measured using the thermistor.

Abstract: The present disclosure provides a light-emitting diode lamp designed to replace an incandescent filament bulb for illumination purposes in a transportation vehicle and a light-emitting diode circuit associated therewith.

Abstract: A method for operating an optoelectronic semiconductor device. The semiconductor device includes a first optoelectronic semiconductor chip for generating, for example, blue light, an optional second optoelectronic semiconductor chip for generating, for example, green light, and a third optoelectronic semiconductor chip for generating, for example, red light. The semiconductor device also includes a driver unit which supplies the semiconductor chips with current during operation. The third semiconductor chip is operated on the basis of a temperature-brightness characteristic curve stored in the driver unit. The temperature-brightness characteristic curve is configured for a minimum color location deviation over an intended operating temperature range, relative to at least one reference color location.

Abstract: A load control device for controlling the amount of power delivered to an electrical load (e.g., an LED light source) includes first and second semiconductor switches, a transformer, a capacitor, a controller, and a current sense circuit operable to receive a sense voltage representative of a primary current conducted through a primary winding of the transformer. The primary winding is coupled in series with a semiconductor switch, while a secondary winding is adapted to be operatively coupled to the load. The capacitor is electrically coupled between the junction of the first and second semiconductor switches and the primary winding. The current sense circuit receives a sense voltage and averages the sense voltage when the first semiconductor switch is conductive, so as to generate a load current control signal that is representative of a real component of a load current conducted through the load.

Abstract: A driving device is provided. The driving device includes a signal processing circuit and a driving circuit. The signal processing circuit is configured to generate a current input signal according to a target current signal. The driving circuit is configured to receive the current input signal and generate a current output signal according to the current input signal to drive a light emitting element. In a first time interval, the current input signal gradually rises from a first current value to a target current value in a continuous or segmented manner according to a rising slope. Further, a control method of the driving device and a lighting system including the driving device are also provided.

Abstract: A dimming signal processing circuit having multiple functions includes a dimming signal input terminal and a dimming signal output terminal, and further includes an input signal processing circuit, a modulation circuit, an isolation circuit and an output shaping circuit connected in cascade to the dimming signal input terminal, and an oscillation signal output circuit connected to the modulation circuit, wherein the output shaping circuit comprises a plurality of signal output circuits connected to the dimming signal output terminal respectively. The dimming signal processing circuit having multiple functions is low in cost and high in practicability, and meets new laws and regulations and more use requirements.

Abstract: A display device includes: a substrate; a display element layer on one surface of the substrate and including at least one light emitting element emitting light; and a pixel circuit portion on the display element layer and including at least one transistor electrically connected to the light emitting element, wherein the display element layer includes: a first electrode on the substrate and electrically connected to one end of the light emitting element; a second electrode on the substrate and electrically connected to the other end of the light emitting element; and an insulation layer on the substrate including the second electrode, and having a first opening exposing a portion of the second electrode, and wherein the second electrode is electrically connected to the transistor through the first opening.

Abstract: AC-driven light-emitting diode systems and methods are provided for driving LED devices (e.g., LED lighting) using AC power. For example, an integrated circuit includes a first power line and a second power line configured for connection to AC power, and a plurality of LED stages, wherein each LED stage comprises multiple serially-connected LED devices, switches connected to inputs and outputs of the LED stages. The integrated circuit further includes switch control circuitry configured to control the switches to selectively connect one or more of the LED stages to the first and second power lines to empower the LED stages with the AC power.

Abstract: A load control device for controlling the amount of power delivered to an electrical load (e.g., an LED light source) includes first and second semiconductor switches, a transformer, a capacitor, a controller, and a current sense circuit operable to receive a sense voltage representative of a primary current conducting through to a primary winding of the transformer. The primary winding is coupled in series with a semiconductor switch, while a secondary winding is adapted to be operatively coupled to the load. The capacitor is electrically coupled between the junction of the first and second semiconductor switches and the primary winding. The current sense circuit receives a sense voltage and averages the sense voltage when the first semiconductor switch is conductive, so as to generate a load current control signal that is representative of a real component of a load current conducted through the load.

Abstract: A load control system for controlling the amount of power delivered from an AC power source to a plurality of electrical load includes a plurality of independent units responsive to a broadcast controller. Each independent unit includes at least one commander and at least one energy controller for controlling at least one of the electrical loads in response to a control signal received from the commander. The independent units are configured and operate independent of each other. The broadcast controller transmits wireless signals to the energy controllers of the independent units. The energy controllers do not respond to control signals received from the commanders of other independent units, but the energy controllers of both independent units respond to the wireless signals transmitted by broadcast controller. The energy controller may operate in different operating modes in response to the wireless signals transmitted by the broadcast controller.

Abstract: An illumination switch device includes a push button, a plurality of indicator lenses, a holder, a detector, a plurality of light emitters, and a base. The push button has an internal space and an opening. Each indicator lens has a columnar shape. The indicator lenses are juxtaposed in the internal space of the push button. The holder holds the push button such that the push button is movable in a longitudinal direction of each indicator lens. The detector detects a displacement of the push button in the longitudinal direction. The light emitters are respectively disposed opposite one ends of the indicator lenses in the longitudinal direction. The base is made of an opaque resin, and covers side faces of the indicator lenses while being in tight contact with the side faces. The base is integrated with the indicator lenses.

Abstract: A battery information processing system includes an analyzer configured to analyze a result of measurement of an AC impedance of a module M. The analyzer plots the result of measurement of the AC impedance on a first frequency characteristic diagram which is a Bode diagram (a first diagram) relating to a real number component of the AC impedance and on a second frequency characteristic diagram which is a Bode diagram (a second diagram) relating to an imaginary number component of the AC impedance, obtains a polynomial curve L1 by fitting processing onto a result of plotting on the first diagram and obtains a polynomial curve L2 by fitting processing onto a result of plotting on the second diagram, and converts the polynomial curves L1 and L2 into an impedance curve Z on a Nyquist diagram.

Abstract: An elongated microwave powered lamp (1) having one or more bulbs with any length or shape or disposition according to a linear series, straight or curved, includes: at least one transparent elongated bulb (2) containing, in an inner space thereof, a material apt to be excited by microwave irradiation thereby emitting an electromagnetic radiation; a coaxial microwave antenna placed outside the bulb (2) and respectively connected to a microwave source (81) via corresponding antenna lead (91), said bulb (2) and said at least one microwave coaxial antenna being displaced in a close relationship to each other to allow the microwave excitation of said material, wherein the outer tubular conductor of the coaxial antenna (5) has spaced holes (6) formed therethrough and facing the bulb (2), at which microwaves are released toward the bulb.

Abstract: AC-driven light-emitting diode systems and methods are provided for driving LED devices (e.g., LED lighting) using AC power. For example, an integrated circuit includes a first power line and a second power line configured for connection to AC power, and a plurality of LED stages, wherein each LED stage comprises multiple serially-connected LED devices, switches connected to inputs and outputs of the LED stages. The integrated circuit further includes switch control circuitry configured to control the switches to selectively connect one or more of the LED stages to the first and second power lines to empower the LED stages with the AC power.

Abstract: A drive system for an electric motor includes a first inverter that includes first switching elements, a second inverter that includes second switching elements, and a control unit that includes a first inverter control calculation section controlling on-off operation of each of the first switching elements based on a first carrier wave and a first modulation wave, a second inverter control calculation section controlling on-off operation of each of the second switching elements based on a second carrier wave and a second modulation wave, and a control synchronization section synchronizing the first carrier wave with the second carrier wave. When a sum of voltages of the first voltage source and the second voltage source is more than a voltage determination threshold, and torque of a rotating electric machine is smaller than a torque determination threshold, the control synchronization section synchronizes the first carrier wave with the second carrier wave.

Abstract: A power switch includes a bridge-connected switching circuit with (1) a pair of MOSFETs back-to-back in series between line and load connections, an interconnection point of the MOSFETs being a first common connection, and (2) a pair of diodes back-to-back between the line and load connections, an interconnection point of the diodes being a second common connection. A line/load controller has supply inputs connected to the first and second common connections for receiving operating power, and (1) places both MOSFETs in the ON state to deliver normal operating current to the load for normal operation, and (2) places both MOSFETs in the OFF state to deliver (by body diode conduction) a substantially reduced leakage current to the load when the load is not powered for normal operation, the leakage current providing the operating power to the line/load controller.

Abstract: There are provided an information transmitter and an apparatus including the same. The information transmitter includes a signal generator configured to output an information signal including pulses changed from a first state to a second state or a third state and subsequently changed from the second state or the third state to the first state. A time period in which some of the pulses are changed from the first state to the second state or the third state may be shorter than a time period in which some of the pulses are changed from the second state or the third state to the first state. The information transmitter also includes a transmitting coil configured to receive the information signal and generate a magnetic field based on the information signal.

Abstract: A display panel is provided. In the display panel, a plurality of pixels respectively including a plurality of sub pixels are arranged in a matrix form on a glass. Each of the plurality of sub pixels includes a driving circuit disposed on the glass and configured to receive a PAM data voltage and a PWM data voltage, and an inorganic light emitting device configured to emit a light based on a driving current provided from the driving circuit. The PAM data voltage is applied at once to the plurality of pixels included in the display panel. The driving circuit compensates a deviation between driving circuits included in each of the plurality of sub pixels based on a driving voltage of the driving circuit, and controls a pulse width of a driving current having an amplitude corresponding to the applied PAM data voltage based on the applied PWM data voltage.

Abstract: There are provided an information transmitter and an apparatus including the same. The information transmitter includes a signal generator configured to output an information signal including pulses changed from a first state to a second state or a third state and subsequently changed from the second state or the third state to the first state. A time period in which some of the pulses are changed from the first state to the second state or the third state may be shorter than a time period in which some of the pulses are changed from the second state or the third state to the first state. The information transmitter also includes a transmitting coil configured to receive the information signal and generate a magnetic field based on the information signal.

Abstract: An optoelectronic device comprises a substrate; a groove on the substrate; a plurality of semiconductor units on the substrate and separated by the groove, wherein each semiconductor unit comprises a first semiconductor layer, a second semiconductor layer, and an active region interposed between the first semiconductor layer and the second semiconductor layer; a connecting part crossing the groove for connecting two of the plurality of semiconductor units, wherein the connecting part comprises one end on the first semiconductor layer and another end on the second semiconductor layer; a first electrode comprising a plurality of first extensions jointly connected to the one end of the connecting part; and a second electrode comprising a plurality of second extensions jointly connected to the another end of the connecting part, wherein an amount of the plurality of first extensions is different from an amount of the plurality of second extensions.

Abstract: Current through an illumination source is controlled by means of a feedback loop whereby the current is measured and fed back to a current controller, which compares this to a set-point and based thereon outputs a current control signal which controls downstream power circuitry driving the current through the illumination source. This keeps the illumination at a steady dim level. Data is also coded into the illumination by modulating the current control signal, i.e. at the output of the current controller, but prior to the input to the power circuitry. The present disclosure provides a compensation filter arranged to apply a compensation to the error signal, to at least partially remove an effect of a distortion of the current measurement caused by the modulation of the data symbols into the illumination source current.

Abstract: A load control device for controlling the amount of power delivered to an electrical load (e.g., an LED light source) includes first and second semiconductor switches, a transformer, a capacitor, a controller, and a current sense circuit operable to receive a sense voltage representative of a primary current conducting through to a primary winding of the transformer. The primary winding is coupled in series with a semiconductor switch, while a secondary winding is adapted to be operatively coupled to the load. The capacitor is electrically coupled between the junction of the first and second semiconductor switches and the primary winding. The current sense circuit receives a sense voltage and averages the sense voltage when the first semiconductor switch is conductive, so as to generate a load current control signal that is representative of a real component of a load current conducted through the load.

Abstract: A light emitting device, which includes a plurality of light emitting elements each having a different chromaticity of emission light, to emit mixed light produced by mixing the respective emission light of the plurality of light emitting elements together, includes a receiving section to obtain command information on the mixed light, a driving section to perform a PWM drive on the plurality of light emitting elements on the basis of the command information, and a storing section to store correction information to be set on the basis of measurement results on the respective emission light of the plurality of light emitting elements. The driving section is being configured in such a manner as to, on the basis of the correction information, correct a duty ratio in the PWM drive to be set in accordance with the command information, and perform the PWM drive on the plurality of light emitting elements.

Abstract: In a single lighting device including a large number of light-emitting elements (LEEs), the LEEs are divided into separately powered groups, and different combinations of the groups are fully energized to achieve the desired overall brightness. In some embodiments, the number of LEEs in each group has a binary relationship to the other groups. The resolution of the dimming is the brightness of the smallest group. In one example of five binary weighted groups of LEEs, 32 brightness levels can be achieved while the LEEs in the energized groups are fully ON. Thus, since there is no high frequency switching, there is substantially no power dissipation by the dimming control system, and there is limited noise or EMI created. The dimming control can be easily implemented with a logic circuit controlling a transistor switch for each group.

Abstract: The invention relates a system for determining a change in a room (1). The invention comprises in particular a self-teaching illuminating system which detects a presence of an individual in an illuminated area. The system comprises lighting means (2) which output light, control means (3) which control the luminous output from the lighting means (2), measuring means (4) which determine a luminous intensity, and an evaluation means (6) which evaluates the luminous intensity determined by the measuring means (4). The evaluation means (6) is designed to detect a change of an object/individual in the room (1), starting from a determined luminous intensity at at least one first time, at which the lighting means (2) outputs no light, and a luminous intensity at at least one second time, at which the lighting means (2) outputs light.

Abstract: An electronic device has a display with a pixel array overlapping an array of temperature sensors. Control circuitry in the device may gather temperature measurements from the temperature sensor array. The control circuitry may apply a global offset to the temperature measurements and may apply a damping factor to the globally offset measurements to produce a two-dimensional temperature profile for the display. A look-up table or other data structure may be used to store information on pixel color correction gain values as a function of temperature. This temperature-gain information and temperature information from the two-dimensional temperature profile may be used by display circuitry in the device to display color-corrected images on the display.

Abstract: An LED lighting device comprises at least one LED selectively energizable to develop light and a control circuit coupled to the LED that develops a command signal comprising first and second command signal components for controlling the at least one LED to cause the LED to develop light comprising a desired brightness in response to the first command signal component. The control circuit controls the at least one LED to cause the LED to develop light comprising a further desired parameter magnitude other than desired brightness in response to the second command signal component, and the first signal component comprises an IEC 0-10 volt analog lighting control.

Abstract: Provided is a light emission device. When the size of an input voltage exceeds a minimum light emission voltage, all light emission elements emit light always irrespective of the size of a voltage, and as the size of the voltage decreases, the light emission device has a configuration in which the light emission elements are connected in parallel with each other, and as the size of the voltage increases, the light emission device has a configuration in which the light emission elements are connected in series with each other.