Abstract: A LED driving circuit that may control current flow into an LED on a current path according to the amount of light sensed from the LED. An LED driving circuit for driving at least one LED may include at least one of: An optical sensor for receiving light emitted from the LED and generating a feedback signal having a level corresponding to an amount of the received light. A current regulator provided on a path through which current of the LED flows for regulating an amount of current flowing into the LED according to a comparison of the feedback signal with a first reference signal.

Abstract: According to one embodiment of the disclosure, a light beam control system includes a positive intrinsic negative diode coupled to a controller circuit. The positive intrinsic negative diode receives a portion of a light beam generated by a light source and converts the portion into a measured intensity. The controller circuit receives the measured intensity, determines an output signal according to the measured intensity and a reference, and adjusts the light beam according to the output signal.

Abstract: A load control device for controlling an amount of power delivered to an electrical load from an AC power source, the load control device comprising a semiconductor switch operable to be coupled in series electrical connection between the source and the load, the semiconductor switch having a control input for controlling the semiconductor switch between a non-conductive state and a conductive state; a controller operatively coupled to the control input of the semiconductor switch for controlling the semiconductor switch between the non-conductive state and the conductive state; a touch sensitive front surface; a touch sensitive device responsive to a point actuation on the touch sensitive front surface, the point actuation characterized by a position and a force, the touch sensitive device comprising a resistive divider and an output operatively coupled to the controller for providing a control signal to the controller; and a capacitor coupled to the output of the touch sensitive device for stabilizing the c

Abstract: An accelerator that can accelerate by itself all ions up to any energy level allowed by the magnetic fields for beam guiding, and provides an all-ion accelerator in which with trigger timing and a charging time of an induced voltage applied to an ion beam injected from a preinjector by induction cells for confinement and acceleration used in an induction synchrotron, digital signal processors for confinement and acceleration and pattern generators for confinement and acceleration generate gate signal patterns for confinement and acceleration on the basis of a passage signal of the ion beam and an induced voltage signal for indicating the value of the induced voltage applied to the ion beam, and intelligent control devices for confinement and acceleration perform feedback control of on/off of the induction cells for confinement and acceleration.

Abstract: A nightlight including a light emitting diode (LED) is provided. The nightlight includes a switch that is operative to control the flow of power to the LED. The nightlight also includes a driver circuit that is configured to convert alternating current to direct current, where the direct current provides power to the LED. The nightlight also includes a housing coupled to the nightlight that contains the driver and is configured to fit within a single-gang junction box. The switch includes an LED that is powered by the driver circuit, where the LED is illuminated without regard to the position of the switch.

Abstract: A dual unbalanced indirectly heated cathode (IHC) ion chamber is disclosed. The cathodes have different surface areas, thereby affecting the amount of heat radiated by each. In the preferred embodiment, one cathode is of the size and dimension typically used for IHC ionization, as traditionally used for hot mode operation. The second cathode, preferably located on the opposite wall of the chamber, is of a smaller size. This smaller cathode is still indirectly heated by a filament, but due to its smaller size, radiates less heat into the source chamber, allowing the ion source to operate in cold mode, thereby preserving the molecular structure of the target molecules. In both modes, the unused cathode is preferably biased so as to be at the same potential as the IHC, thus allowing it to act as a repeller.

Abstract: A light source system capable of controlling a light emission amount of a light source section more accurately while keeping manufacturing costs low is provided. The light source system includes a light source, a light-sensing device detecting light from the light source, a calculation means, and a light source control means. The calculation means calculates a net light amount by subtracting a measurement environment component from a light amount detected by the light-sensing device. The measurement environment component is independent of a lighting state in the light source. The light source control means controls the light source on the basis of the net light amount obtained by the calculation means.

Abstract: Various exemplary embodiments relate to an energy saving device which supplies high efficiency sodium-vapor street lights and a method of providing additional savings of electrical energy by means of the temporary reduction in the luminous flow of a high efficiency sodium-vapor street light. The energy saving device includes in its operation protection against low voltage supply, regulation of supply voltage, and protection in absence or damage of the lamp. In turn, the method includes a sequence for reliable ignition of the lamp, a modulation routine in frequency for elimination of acoustic resonance, and an automatic turn off sequence in view of damage of the photocell, as well as a consumption detection system to keep the output power steady and therefore, keep the power consumption under a steady value.

Abstract: A circuit structure for LCD backlight is disclosed in the present invention. The circuit structure includes an inverter topology, a current balance circuit, and a plurality of loads. The current balance circuit is coupled to the plurality of loads and capable of balancing current of N loads by using N/2?1 balance chokes. The circuit structure may further include a protection circuit which is coupled to the low voltage sides of the plurality of loads. The protection circuit is capable of sensing lamp voltages and providing a feedback signal to a controller. Furthermore, the protection circuit is composed of count-reduced and cost-competitive electronic elements.

Abstract: An electrostatic fluid accelerator includes an electrode array comprising an array of corona discharge electrodes and an array of accelerating electrodes for moving a fluid. A detector is configured to sense a constituent component of the fluid. A control circuit supplies power to the electrode array and operates the electrostatic fluid accelerator in response to an output from the detector.

Abstract: A power supply and methods are provided. In one implementation, the power supply includes a switching circuit and a converter. The switching circuit includes a first transistor and a second transistor, and the converter includes a capacitor and an inductor. The switching circuit alternately switches an input voltage to the converter. The power supply further includes a controller operable to adjust a switching frequency of the first transistor and the second transistor to substantially match a resonant frequency of the capacitor and the inductor.

Abstract: A magnetron including a cathode, an anode axially aligned with the cathode and including a plurality of radial vanes defining resonant cavities, an output coupler connected to a first set of the vanes, a second set of vanes not connected to the output coupler, and extensions formed on only the vanes of the second set, the extensions extending in the axial direction towards the output coupler in a direction parallel to the axis of the anode, the extensions not being connected to the output coupler, whereby a capacitance between the axial extensions and the cathode at least partly compensates for the capacitance between the output coupler and the cathode.

Abstract: A user interface for a lighting control has a touch sensitive front surface; a four-wire resistive touch pad responsive to a point actuation on the front surface, the touch pad having a longitudinal resistive element for providing a first control signal representative of the position of the point actuation along the longitudinal axis, and a lateral resistive element for providing a second control signal representative of the position of the point actuation along the lateral axis; a controller receiving the first and second control signals; a first capacitor coupled between the lateral resistive element and a circuit common that charges and discharges through the longitudinal resistive element of the resistive touch pad to stabilize the first control signal; and first, second, and third switches controlled by the controller to provide a DC supply voltage to the resistive elements and to couple a respective resistive element to the controller.

Abstract: In an apparatus for driving a CCFL, a first inverter outputs a first alternating current (AC) voltage to one end of the CCFL. A second inverter outputs a second AC voltage having a reversed phase to the first AC voltage to the other end of the CCFL. A first current-voltage converting circuit converts a secondary current of a first transformer in the first inverter to a voltage and outputs the voltage as a first detection voltage. A second current-voltage converting circuit converts a secondary current of a second transformer in the second inverter to a voltage and outputs the voltage as a second detection voltage. A first abnormality detection circuit determines a circuit abnormality when the potential difference between the first and second detection voltages exceeds a predetermined first threshold voltage.

Abstract: A display device includes a display unit in which display elements provided with pixel circuits are arranged so as to have a sequence of three different colors in a row direction and the colors are shifted in a column direction by 1.5 columns. A scanning line is provided in every row of the display unit, a signal line is provided in every column of the display unit, and a column control circuit outputs a display signal for every column. The positions of the pixel circuits are displaced in the row direction with respect to the arrangement of the display elements, and are thus aligned in the column direction and also connected to the signal line only on one side of the signal line. No inversion of the pixel circuit pattern occurs and variations of the circuit characteristics in every row are suppressed.

Abstract: Fluctuations in a plasma characteristic such as load impedance are compensated by a controller that modulates a stabilization RF generator coupled to the plasma having a frequency suitable for stabilizing the plasma characteristic, the controller being responsive to the fluctuations in the plasma characteristic.

Abstract: A power adaptor for a lighting unit, comprising an input for coupling to an electrical power supply and a controller adapted to monitor the input and operable to provide at least two independent electrical outputs; each output having a power level based on an amount of power available at the input. The independent electrical outputs may be used to supply and control an intensity and/or color characteristic of a solid state lighting unit; comprising at least two separately controllable colored emitters.

Abstract: A voltage supplied from a power supply is boosted by a boosting circuit unit to generate a direct-current voltage, and the pulse-shape direct-current voltage is applied to LED while a constant-voltage control unit controls the direct-current voltage. The operation of LED is controlled by a control unit and a PWM unit. When the current is passed through LED, the constant-voltage control unit obtains information on the current passed through LED from a potential difference between both ends of a resistor, and on-and-off control of the voltage applied to LED from the boosting circuit unit is performed at a high frequency based on the information. Therefore, the voltage applied to LED can be controlled to keep the current passed through LED constant.

Abstract: A variable intensity LED illumination system is configured to provide a change in luminance versus input voltage that corresponds to a desired transfer function, such as the dimming characteristics of an incandescent lamp, which more closely resembles the response of the human eye. The system also advantageously provides overvoltage protection, increased brightness, energy efficiency, and significantly better longevity and ruggedness, compared to incandescent lamps.

Abstract: A method for generating atmospheric pressure cold plasma inside a hand-held unit discharges cold plasma with simultaneously different rf wavelengths and their harmonics. The unit includes an rf tuning network that is powered by a low-voltage power supply connected to a series of high-voltage coils and capacitors. The rf energy signal is transferred to a primary containment chamber and dispersed through an electrode plate network of various sizes and thicknesses to create multiple frequencies. Helium gas is introduced into the first primary containment chamber, where electron separation is initiated. The energized gas flows into a secondary magnetic compression chamber, where a balanced frequency network grid with capacitance creates the final electron separation, which is inverted magnetically and exits through an orifice with a nozzle. The cold plasma thus generated has been shown to be capable of accelerating a healing process in flesh wounds on animal laboratory specimens.