Abstract: An embodiment LED driver system comprises a power transistor configured to be selectively activated for generating a driving current for an array of LEDs, the power transistor having a first conduction terminal coupled to the array of LEDs and a second conduction terminal coupled to a reference resistor; an operational amplifier having a non-inverting input for receiving a reference voltage, an inverting input coupled to the second conduction terminal of the power transistor, and an output terminal coupled to a first conduction terminal of a transmission gate having a second conduction terminal coupled to a control terminal of the power transistor and a control terminal for receiving an enable signal; and a slew rate control unit configured to control the slew rate of the driving current.

Abstract: A high gradient linear accelerating structure can propagate high frequency waves at a negative harmonic to accelerate low-energy ions. The linear accelerating structure can provide a gradient of 50 MV/m for particles at a ? of between 0.3 and 0.4. The high gradient structure can be a part of a linear accelerator configured to provide an energy range from an ion source to 450 MeV/u for 12C6+ and 250 MeV for protons. The linear accelerator can include one or more of the following sections: a radiofrequency quadrupole (RFQ) accelerator operating at the sub-harmonic of the S-band frequency, a high gradient structure for the energy range from ˜45 MeV/u to ˜450 MeV/u.

Abstract: An embodiment electronic device includes a ground plane; and an antenna. The antenna includes a first trace having a first end and a second end, the second end of the first trace being electrically coupled to the ground plane. The antenna also includes a second trace distinct and physically separated from the first trace, the second trace having a first end and a second end, the second end of the second trace being electrically coupled to the ground plane, the first trace and the second trace forming discontinuous portions of the antenna.

Abstract: An integrated antenna assembly includes one or more antenna elements, one or more electronics components, and one or both of a static discharge element disposed between the antenna element(s) and the electronics component(s) and/or one or more thermal dissipators.

Abstract: The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The present disclosure provides apparatuses and methods for measuring power for a lighting control system. The includes a lighting control module configured to cause a transmission of a quantity of electrical power to a lighting circuit of a light fixture electrically connected to the lighting control module, a detector circuit positioned in the lighting control module, and a controller in electrical communication with the detector circuit. The controller is specially programmed to correlate a quantity of electrical power transmitted to the lighting circuit to the response of the lighting circuit. The controller is further programmed to determine a power correction factor based on the correlation between the quantity of electrical power transmitted and the response. The power correction factor is configured to alter the response of the lighting circuit to a predetermined value.

Abstract: A load control system may be commissioned using beacons. The load control system may include control devices that each include a beacon transmitting circuit configured to transmit a beacon that comprises an identifier associated with the control device. A network device, such as a mobile device, may discover a control device based on the beacon received from the control device. In response to discovery of the control device, the control device may be added to a temporary group of control devices for being collectively configured and/or controlled. Control devices may be discovered based on the signal strength at which the beacons are received. The control devices may provide feedback to a user in response to confirmation messages to indicate to a user that the lighting control device has been added to the temporary group. The control devices may stop providing the feedback after they are removed from the temporary group.

Abstract: A light emission control device includes: a first light emission control circuit outputting a first control signal and a second control signal; and a second light emission control circuit outputting a third control signal and a fourth control signal. The first light emission control circuit controls a phase of the second control signal based on a first PWM signal in a first PWM dimming mode. The second light emission control circuit controls a phase of the fourth control signal based on a second PWM signal in a second PWM dimming mode. The second light emission control circuit outputs the fourth control signal having a phase different from that of the second control signal in a first analog dimming mode and a second analog dimming mode.

Abstract: A modular system includes an LED driver and an LED light engine. The driver includes a switched mode power converter and a first control unit to control a switch of the converter, thereby controlling the supply current to an LED assembly of the light engine. The assembly includes LEDs and one or more switches arranged in series or in parallel with one or more of the LEDs. The light engine also includes a second control unit controlling the one or more switches of the LED assembly so as to control current through the LEDs. The first control unit controls amplitude of the supply current. The second control unit controls duty cycle of the LED current through the LEDs. The first and second control units are configured to synchronize a switching operation of the switched mode power converter with a switching operation of the switches of the light engine.

Abstract: The invention further describes tube LED lamp (1) realised to replace a fluorescent tube lamp (70), which tube LED lamp (1) comprises a tube (12) containing an LED arrangement (10) with a number of LEDs (100); a connector arrangement (16A, 16B) with connectors (16) realized for insertion into sockets (50) of a socket arrangement (50A, 50B) of a tube lamp housing (5) incorporating a dimming ballast (20, 21); a driver circuit arrangement (11) for driving the LED arrangement (10), which driver circuit arrangement (11) is realized to output an LED current (ILED) on the basis of an input current provided by the dimming ballast (20, 21); and a safety switch (S13, M1) arranged within the tube (12) to electrically isolate connectors (16) of the connector arrangement (16A, 16B), wherein the safety switch (S13, M1) is arranged between the driver circuit arrangement (11) and the LED arrangement (10).

Abstract: An antenna assembly includes an antenna carrier having a cylindrical body with a side wall extending between a top and a bottom and extensions extending from the side wall at the bottom at different radial positions. An antenna is coupled to the body having a film supporting first and second antenna elements having first and second feed lines and first and second antenna lines. The feed lines extend along corresponding extensions and the antenna lines wrap helically around the side wall. The antenna assembly includes clip terminals coupled to the extensions being electrically coupled to corresponding feed lines. The clip terminals have terminating ends configured to be electrically terminated to host conductors.

Abstract: An electrical load set circuit and apparatus having at least three control signal lines arranged in parallel, a pair of polarized electrical loads connected between two of the signal lines, and another electrical load connected between a different control signal line and one of the polarized loads. Individual ones of the electrical loads can be selectively activated without requiring an additional common (ground) line. At least two of the control signal lines can be kept in a floating state. A light strip includes plural light set circuits spaced along the control signal lines. In another variation, first and second light points are spaced along the three control signal lines, each including three different color LEDs respectively.

Abstract: A wireless communication device is provided. The wireless communication device comprises a circuit board, a key module and a sensing module. The key module is electrically connected with at least one key through the circuit board. The sensing module is electrically connected with the circuit board, wherein the circuit board is taken as an induction conductor of the sensing module. Therefore, according to the wireless communication device disclosed by the disclosure, the functions of the key module, the sensing module and an antenna module are integrated on a same component, so that the component has three-in-one functions, and the efficiency of an antenna is further enhanced.

Abstract: A control circuit and a method for controlling a piezoelectric transformer are disclosed. In an embodiment the control circuit includes an inductor and a control unit, wherein the control circuit is configured to apply a voltage with a periodic waveform to a piezoelectric transformer, wherein a period duration of the voltage is specified by a control frequency and adjust the control frequency of the applied voltage as a function of an average current intensity of a current flowing through the inductor.

Abstract: An electronic device is provided. The electronic device includes a housing, an antenna structure including a printed circuit board, a first sub antenna structure including first group antenna elements, a second sub antenna structure including second group antenna elements disposed in a first direction from the first sub antenna structure, a third sub antenna structure including third group antenna elements disposed in a second direction perpendicular to the first direction, and a fourth sub antenna structure including fourth group antenna elements disposed to form a two-dimensional array together with at least some antenna elements of the first group antenna elements, the second group antenna elements, or the third group antenna elements, and a communication circuit that transmits and/or receives a signal having a frequency between 3 GHz and 100 GHz by using at least a part of the first, the second, the third, or the fourth group antenna elements.

Abstract: The present disclosure relates to a drive control system for a light-emitting diode string, comprising a control unit and a signal-generating unit. The signal-generating unit comprises a switching element with a first terminal, a second terminal and a control terminal. One end of the control unit is connected to the control terminal, and the second terminal is connected to a negative terminal of the light-emitting diode string. A voltage stabilizing circuit is connected to the negative terminal of the light-emitting diode string, wherein a positive terminal of the light-emitting diode string is connected to a power supply unit. When the control unit turns on the switching element, the power supply unit directly drives the light-emitting diode string to emit light. When the control unit turns off the switching element, the power supply unit drives the light-emitting diode string to emit light through the voltage stabilizing circuit.

Abstract: A luminaire has a light-emitting diode (LED) light source, a light sensor, and a control system. The control system receives a Measure command measure the current intensity of the LED light source. The control system measures the intensity using the light sensor, stores current intensity data in non-volatile memory, obtains the LED light source's previous intensity, selects an indicator color representing how much the current intensity is reduced from the previous intensity, and causes the luminaire to emit a light beam having the indicator color. The control system also receives an Adjust command to reduce the LED light source to a total intensity reduction amount. The control system obtains the LED light source's current reduction amount, determines whether the total intensity reduction amount is more than the current reduction amount, and, if so, causes the LED light source to emit a reduced intensity light beam.

Abstract: Introduced here are techniques for generating color mixing models that enable a tunable lamp to mix the right amount of light from various color channels in order to properly produce colors. More specifically, a lamp controller can be configured to drive multiple light-emitting diode (LED) arrays based on corresponding color mixing models. One or more color mixing models can be provisioned into the memory of an LED array prior to usage. Storing the color mixing model in the LED array enables the lamp controller to update the color mixing model based on which LED array it is serving (i.e., the lamp controller and the LED array need not be a permanently matched set). Additionally or alternatively, the lamp controller may be configured to communicate with a network-accessible computer server system to access a historical color mixing database that includes set(s) of previously-recorded spectral properties and corresponding color mixing models.

Abstract: A driving circuit (10) to generate a signal pulse for operating a light-emitting diode (20) comprises an external terminal (LEDK, LEDA) to connect the light-emitting diode (20) to the driving circuit (10). In a first operating state/pre-charge state of the driving circuit (10), a first controllable switching circuit (100) connects a first side (301) of a capacitor (300) to a reference potential (Vref) and a second controllable switch (200) connects a second side (302) of the capacitor (300) to one of a supply and ground potential (VDD, VSS). In a second operating state of the driving circuit (10), the first controllable switching circuit (100) connects the first side (301) of the capacitor (300) to said one of the supply and ground potential (VDD, VSS) and the second controllable switch (200) connects the second side (302) of the capacitor (300) to the external terminal (LEDK, LEDA) to provide a signal pulse for operating the light emitting diode.

Abstract: An LED lighting driver has a switched mode power supply which generates an auxiliary power supply. The auxiliary power supply circuit has a first power supply inductor and a second power supply inductor in series with each other. The second power supply inductor is selectively switched into or out of the auxiliary power supply circuit, thereby varying a transformer ratio to the main energy storage inductor. The switching may be made based on a light output mode or a standby mode being in operation. The standby mode then enables more efficient generation of an auxiliary supply voltage.

Abstract: An antenna structure capable of transmitting radio waves in multiple polarizations is positioned on a circuit board. The circuit board includes upper and lower surfaces and peripheral side wall. The antenna structure includes a first antenna array, a second antenna array, and a control circuit. Each antenna unit of the first antenna array is positioned on one of the upper surface or the lower surface, a portion of each antenna unit of the second array is positioned on the peripheral side wall. The other portion of each antenna unit bended and positioned on at least one of the upper surface or the lower surface. In activating the first antenna array and the second antenna array the control circuit can generate radio transmissions in multiple polarizations. A wireless communication device is also provided.