Abstract: A LED lighting apparatus has a circuit board and a base. The base is a hollow structure. The base with lateral wall has a conducting element. The circuit board is in the base and has a LED power driving circuit and a LED source. The LED power driving circuit has a full-bridge rectification. A ?-filter circuit and a non-isolated switch driving circuit connected in order. An output terminal of the non-isolated switch driving circuit is connected with the LED source. The full-bridge rectification, the ?-filter circuit and the non-isolated switch driving circuit are common grounded to form a power ground. The power ground is electronically connected with the conducting element in order to reduce the interference of an electromagnetic energy generated by the high-frequency switch signal to other appliances.

Abstract: A method for controlling a generator connected to a load involving obtaining a first measured value (M1) related to a forward power calculated with respect to reference impedance (Zc). The method involves adjusting an output of the generator in order that M1 tends to a first setpoint. The method further involves adjusting the first setpoint in order to adjust a second measured value (M2) of a conventional measure of generator output towards a second setpoint, where wherein the forward power calculated with respect to the reference impedance (Zc) is equal to: ? v + Z c ? i ? 2 2 ? real ? ? ( Z c ) where v is a voltage at a reference point, which may be between the generator and load input, and i is a current flowing relative to the load (e.g., current toward the load or a negative value of current toward the generator) at the reference point.

Abstract: A DC-DC converter according to an embodiment comprises: a first converter unit for generating a first output voltage by adjusting a level of an input voltage according to a pulse control signal applied to a first switch element; a first light emitting unit disposed at an output end of the first converter unit; a second converter unit, connected to the output end of the first converter unit, for generating a second output voltage by adjusting a level of the input voltage or the first output voltage according to a pulse control signal applied to a second switch element; a second light emitting unit disposed at an output end of the second converter unit; and a control unit for generating pulse control signals to be applied to the first switch element and the second switch element separately according to driving modes of the first and second light emitting units, and for controlling switching operations of the first and second switch elements according to the generated pulse control signals.

Abstract: Disclosed are systems and methods for automatically detecting an error in commissioning of a system device in a physical environment comprising a plurality of system devices, comprising the steps: (i) receiving (1352), by each the plurality of system devices, a wireless signal from one or more neighboring system devices; (ii) determining (1354), by each the plurality of system devices, a strength of the received wireless signal; (iii) receiving (1356), from an installer (610), a request to commission a first system device within the physical environment, wherein the request comprises an intended location of the first system device; (iv) receiving (1358) the commissioning request and determined wireless signal strengths from at least one system device neighboring the first system device, wherein the location of the at least one system device neighboring the first system device is known; (v) determining (1360), based at least in part on the received wireless signal strength from the at least one neighboring sys

Abstract: A controller for controlling a lighting system, the controller comprising: an interface arranged to communicate with one or more luminaires at a location to be illuminated; a memory arranged to store information, the information comprising a first illumination status of the location, and information of a first command causing the location to adopt the first illumination status; the interface further arranged to receive a second command comprising an instruction for the at least one luminaire to illuminate the location in accordance with a second illumination status which differs from the first illumination status; and a processor configured to determine whether to execute the second command based upon a comparison between a value associated with the first command and a value associated with the second command, the processor configured to calculate the value associated with the first command based upon a priority level value of the first command and a relevance factor associated with the first command, at a ti

Abstract: In a vehicle front lighting apparatus, the number of switch elements brought into an opened state and an applied voltage value is detected every time a predetermined detection condition is satisfied, the amount of change from the number of switch elements detected last time and the amount of change from the voltage value detected last time are acquired, and it is determined that a disconnection has occurred if the amount of change in the number of switch elements does not match the amount of change in the voltage value.

Abstract: A headlamp lighting device (100) is mounted on a vehicle. The headlamp lighting device (100) stores definition information in which a plurality of lamp devices arranged on the vehicle are presented and, for each of the lamp devices, one or more light sources configuring the lamp device and a control value for controlling each of the light sources are presented. Also, for each of the lamp devices, the headlamp lighting device (100) controls lighting of each of the light sources configuring the lamp device by referring to the definition information.

Abstract: A lamp group switching control device for switching and controlling a first lamp group and a second lamp group is provided. When receiving a first power source for driving the first lamp group, the lamp group switching control device controls that only the first lamp group provides a first light signal regardless of whether a second power source for driving the second lamp group is received. When the first power source is not received and the second power source is received, the lamp group switching control device controls that only the second lamp group provides the second light signal.

Abstract: A discharge control apparatus for controlling a flyback power supply circuit which includes a transformer having a primary coil and a secondary coil and performing voltage conversion, and a driver for controlling energization of the primary coil. The power supply circuit supplies electric energy to a plasma reactor. The discharge control apparatus calculates, based on primary current flowing through the primary coil and primary voltage generated in the primary coil, supply energy supplied to the primary coil and regeneration energy which is a portion of the supply energy not used for the discharge in the plasma reactor. The discharge control apparatus controls the power supply circuit based on the calculated supply energy and the calculated regeneration energy. Also disclosed is a method for controlling the flyback power supply circuit.

Abstract: According to a first aspect disclosed herein, there is provided a controller for controlling at least one first luminaire to render lighting scenes in a first environment; the controller comprising: a first input for receiving a lighting sequence defining a first lighting scene to be rendered in the first environment at least until a trigger is received and a second lighting scene to be rendered in response to receiving said trigger in the first environment, thus replacing the first lighting scene; a second input arranged to receive data indicating user presence within the first environment; an output; and a processor arranged to: receive the lighting sequence via the first input; control, via the output, the at least one first luminaire to render the first lighting scene in accordance with the lighting sequence; receive an indication of the trigger and in response thereto, determine, based on data received via the second input, a user presence value within the first environment; and control, via the output,

Abstract: The disclosure describes techniques for driving a plurality of light emitting diodes (LEDs) arranged in a parallel connection by using PWM (Pulse Width Modulation) dimming. The techniques of this disclosure describe the generation and application of a fixed phase shift map to a driver matrix based on pixel position. Each pixel corresponds to an LED light source. In the fixed phase shift map, each pixel will have a pre-defined phase shift calculated to induce a determined variation in turn-on time for geometrically neighbouring pixels to spread out current demand over time during PWM dimming.

Abstract: An exterior aircraft light comprises at least one switchable illumination circuit. Each of the at least one switchable illumination circuits comprises at least one light source, a temperature detector configured for detecting the temperature of the at least one light source and providing a temperature signal, an electric switch for selectively switching power flow to the at least one light source on and off, and a control circuit which is coupled to the temperature detector and to the electric switch. The control circuit is configured for driving the electric switch based on the temperature signal provided by the temperature detector to repeatedly switch power flow to the at least one light source on and off.

Abstract: The light source of the present disclosure spot-irradiates a distant place in front of a vehicle. The turn on/off circuit supplies a driving current ILD to the light source 120 to turn on the light source. The swivel mechanism swivels the light source. The turn on/off circuit reduces a light quantity of the light source as a swivel angle ? of the swivel mechanism is large.

Abstract: System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.

Abstract: A proximity sensor with a sliced integration time sensing mechanism and a sensing method thereof are provided. A light transmitter emits a sensing light toward a detected object during a first phase time. A light receiver receives a first light signal formed by the sensing light reflected by the detected object and an ambient light during the first phase time, and receives a second light signal of the ambient light during a second phase time. A first brightness of the first light signal is integrated over the first phase time to form a first integrated brightness value. A second brightness of the second light signal is integrated over the second phase time to form a second integrated brightness value. The light receiver subtracts the second integrated brightness value from the first integrated brightness value to obtain a first integrated brightness correction value by phase cancellation.

Abstract: A vehicle lighting device includes at least one headlight, a position and/or acceleration sensor, and a control unit for adjusting a light/dark boundary of the headlight. Pitch movements of the vehicle can be detected by the position and/or acceleration sensor, and a change in the light/dark boundary due to the respective pitch movement can be compensated for by the control unit. The position and/or acceleration sensor and the control unit are arranged in the headlight or directly on the headlight.

Abstract: A control circuit, of a control loop, for a lighting driver. The lighting driver is adapted to controllably connect an electronic ballast to an LED light source or lamp. The control circuit comprises a biasing circuit having an adjustable impedance. A tuning circuit adjusts the impedance of the biasing circuit so as to tune a parameter of a frequency response of the control loop and thereby of the lighting driver.

Abstract: An apparatus for controlling a beam pattern of a head lamp for a vehicle, comprising: an object detection unit configured to detect an object ahead of a vehicle; an ADB (Adaptive Driving Beam) head lamp configured to emit a matrix beam according to a beam pattern; a vehicle state input unit configured to receive an ADB operation state; and a control unit configured to calculate the width of a dark zone corresponding to the object and a boundary section around the dark zone according to the object detection result from the object detection unit, and then drive the ADB head lamp according to the ADB operation state.

Abstract: During operation, a computer provides, based at least in part on an initial lighting preference of an individual, instructions specifying initial lighting states of one or more lights in a lighting configuration in an environment, where an initial lighting state of a given light includes an intensity and a color of the given light. Then, the computer receives sensor data specifying a non-verbal physical response of the individual to initial lighting states. Moreover, the computer determines, based at least in part on the non-verbal physical response, a type of reaction of the individual to the initial lighting state. Next, the computer selectively modifies, based at least in part on a lighting behavior history of the individual and the determined type of reaction, the initial lighting preference of the individual to obtain an updated lighting preference.

Abstract: The invention relates to a PSE device (2) to be used in a PoE lighting system (1), wherein the PSE device (2) is adapted to receive input power from a power providing system (7). The PSE device (2) comprises a power detection unit for detecting whether the received input power is primary input power or backup input power, wherein the PSE device (2) is adapted to control the power consumption of lighting units (31, 32) depending on the power detection. This allows for an indication of an emergency situation, in which the backup input power is provided, to the PSE device (2) without necessarily requiring data communication means. Moreover, the power consumption of the lighting units (31, 32) can be more efficiently utilized in case of emergency.