Abstract: A control system for an LED array relies on defining a first and a second group of separately addressed LED pixels, with the first group including pixels with an average current no less than the current at a Q point and a second group including pixels with an average current less than the current at a Q point. An amplitude signal provided to the first group of separately addressed LED pixels is selectively modulated, while providing a DC mode 100% duty cycle. An amplitude signal provided to the second group of separately addressed LED pixels is fixed, and a modulated duty cycle is provided.

Abstract: The present disclosure discloses a display device, including a glass substrate and a plurality of light emitting diodes (LEDs). The glass substrate includes a first side and a second side. The LEDs include a first LED and a second LED. Compared with a reference anode signal, a first anode signal received by the first LED has a first anode signal difference and a second anode signal received by the second LED has a second anode signal difference. The first anode signal difference is smaller than the second anode signal difference. Compared with a reference cathode signal, a first cathode signal received by the first LED has a first cathode signal difference and a second cathode signal received by the second LED has a second cathode signal difference. The first cathode signal difference is larger than the cathode anode signal difference.

Abstract: A roll-to-roll surface cleaning treatment system may include an upper housing containing a first plasma generating device and a first transfer roller that faces a nozzle from which a plasma beam generated by the first plasma generating device is discharged and that winds and transfers a flexible substrate, the upper housing comprising a gas inlet, an entrance through which the flexible substrate is introduced, and an outlet through which the flexible substrate is discharged, and a lower housing connected to the entrance of the upper housing and containing a second plasma generating device and a second transfer roller that faces a nozzle from which a plasma beam generated by the second plasma generating device is discharged and that winds and transfers the flexible substrate, the lower housing comprising a gas outlet, and an inlet through which the flexible substrate is introduced.

Abstract: Driver circuits are described for driving one or more light emitting diodes. A driver circuit may comprise an interface configured to receive control signals from a processor and a signal generator configured to generate pulse modulation (PM) signals based on the control signals, wherein the PM signals define phase shifts. In some examples, the signal generator is configured to: determine whether the control signals indicate a phase shift change; and in response to determining that the control signals indicate a phase shift change, terminate a current PM signal at a beginning of a PM period, and generate a new PM signal in the PM period, wherein the new PM signal includes the phase shift change. In other examples, termination may be avoided in some situations, for example, upon determining that a new phase shift is not sufficiently less than a previous phase shift.

Abstract: An antenna device, a transportation vehicle, and a textile article having an antenna device. The antenna device includes conductive filaments woven into a carrier fabric, wherein the conductive filaments form an antenna structure and are a contacting structure at a first end.

Abstract: An electronic device according to various embodiments may include a housing, an antenna structure positioned in the housing, and a wireless communication circuit.

Abstract: A lighting apparatus includes a light source, a bridge circuit, a voltage node, a filter circuit, a dimmer check circuit and a control circuit. The light source includes a LED module. The bridge circuit generates a DC power at a voltage node by converting an AC power. The filter circuit is connected to the voltage node for converting the DC power to a driving current to the LED module. The dimmer check circuit is coupled to the voltage node for generating a dimmer check signal by detecting whether a wall dimmer is electrically coupled to the lighting apparatus. The control circuit adjusts a setting of the filter circuit according to the dimmer check signal.

Abstract: An antenna assembly and a terminal device are provided. The antenna assembly includes a conductive frame, a circuit board, and a metal conductor. The metal conductor has one end connected to a feed point on the circuit board and the other end connected to a switch on the circuit board and the conductive frame. The switch is configured to adjust a radiation frequency band of the antenna assembly. A radiator of the antenna assembly comprises the metal conductor and the conductive frame.

Abstract: A decorative light string is provided that includes a plurality of light emitting diode (LED) illumination assemblies electrically connected in series and a stabilizing current or voltage circuit. Each of the plurality of LED illumination assemblies includes an LED. The stabilizing current or voltage circuit is electrically connected in series with the plurality of LED illumination assemblies. The stabilizing current or voltage circuit is configured to receive input power from an input power source and configured to supply a stabilized current or voltage to the plurality of LED illumination assemblies that provides a stable supply even with input power source fluctuations. Power fluctuations from an input power source can prevent the decorative light string from maintaining a desired brightness and desired LED life unless the voltage or current to the LED illumination assemblies is stabilized.

Abstract: An LED lighting device having an LED lamp series circuit with a first LED lamp and with a second LED lamp that is coupled to the first LED lamp through a lamp coupling point, an anode, a cathode, driver electronics for connection to the anode and the cathode for operation of the LED lamp series circuit, and a detection device for detecting a failure of the first LED lamp and the second LED lamp. The detection device, together with the first LED lamp and the second LED lamp, forms a first measuring bridge circuit. In addition, the invention relates to a motor vehicle with an LED lighting device according to the invention.

Abstract: A load control device for regulating an average magnitude of a load current conducted through an electrical load may operate in different modes. The load control device may comprise a control circuit configured to activate an inverter circuit during an active state period and deactivate the inverter circuit during an inactive state period. In one mode, the control circuit may adjust the average magnitude of the load current by adjusting the inactive state period while keeping the active state period constant. In another mode, the control circuit may adjust the average magnitude of the load current by adjusting the active state period while keeping the inactive state period constant. In yet another mode, the control circuit may keep a duty cycle of the inverter circuit constant and regulate the average magnitude of the load current by adjusting a target load current conducted through the electrical load.

Abstract: A lamp has a safety circuit connected to first and second electrical connection terminals. A test is used to detect if the first and second electrical connection terminals are both connected to external power without an interfering impedance such a human body, and only then enable operation of the lamp. A time for the test is different from a time when another lamp in the system applies a test.

Abstract: The Kappa converter circuit, as introduced herein, can be configured for step-down (buck), step-up (boost), or buck-boost operation. The Kappa converter circuit exhibits lower electromagnetic interference (EMI) relative to other buck, boost, or buck-boost topologies, such as without additional input or output filter circuits. The Kappa converter circuit can have high power handling capability and less DCR loss, for example due to a distribution of current signals through respective inductors. The Kappa converter circuit includes isolating inductors at its input and ground reference nodes to help reduce signal bounce or signal pulsations at supply and ground reference busses, thereby further reducing EMI noise due to switching in the circuit. When the Kappa converter is configured for step-up operation, the converter exhibits no right-half-plane (RHP) zero.

Abstract: A semiconductor device package includes a substrate, an air cavity, a radiator, and a director. The substrate has a top surface. The air cavity is disposed within the substrate. The air cavity has a first sidewall and a second sidewall opposite to the first sidewall. The radiator is disposed adjacent to the first sidewall of the air cavity. The director is disposed adjacent to the second sidewall of the air cavity.

Abstract: A lighting fixture includes a fixture housing. A circuit board is positioned in the fixture housing. The circuit board includes a driver circuit. A plurality of light emitters are disposed on the circuit board. The light emitters are operatively connected to the driver circuit to produce a light output. A temperature sensor is disposed on the circuit board, the temperature sensor configured to measure a temperature of the circuit board and output a signal. The driver circuit is configured to reduce the light output in response to the signal from the temperature sensor.

Abstract: A method and apparatus for operating a DC plasma torch. The power supply used is at least two times the average operating voltage used, resulting in a more stable operation of the torch. The torch can include two concentric cylinder electrodes, the electrodes can be graphite, and the plasma forming gas can be hydrogen. The power supply provided also has the capability of igniting the torch at a pulse voltage of at least 20 kilovolts.

Abstract: An electronic device is disclosed.

Abstract: A dimming mode detection circuit for an LED lighting system that receives an alternating current input voltage and generates a bus voltage to drive an LED load, the dimming mode detection circuit including: a leading edge detection circuit configured to generate a leading edge detection signal by detecting a leading edge of a first voltage representative of the bus voltage in one sine half-wave cycle, in order to determine whether the LED lighting system operates in a leading edge dimming mode; and a trailing edge detection circuit configured to generate a trailing edge detection signal in accordance with a time length of a first interval from a first value of the first voltage in a previous sine half-wave cycle to a second value of the first voltage in a next sine half-wave cycle, in order to determine whether the LED lighting system operates in a trailing edge dimming mode.

Abstract: A semiconductor package structure is provided. The semiconductor package structure includes a redistribution layer (RDL) structure formed on a non-active surface of a semiconductor die. An antenna structure includes a first antenna element formed in the RDL structure, a first insulating layer covering the RDL structure, a second insulating layer formed on the first insulating layer, and a second antenna element formed on and in direct contact with the second insulating layer.

Abstract: An example circuit includes a substrate having a surface and electrically conductive lines. The electrically conductive lines extend in a direction substantially parallel to the surface and substantially orthogonal to a virtual centerline. The circuit also includes first and second instances of a driver device having respective first and second sides, and respective line outputs. The line outputs are arranged along the first side of the respective instance of the driver device, and the respective first side of each of the first and second instances of the driver device are nearer the virtual centerline than the second side thereof. The line outputs of the first instance of the driver device are coupled to a first set of the electrically conductive lines, and the line outputs of the second instance of the driver device are coupled to a second set of the electrically conductive lines.