Abstract: An isolated conversion apparatus with magnetic bias balance control includes an isolated converter, a controller, and a magnetic bias balance circuit. The isolated converter includes a transformer, and a primary side of the transformer includes a primary-side winding and at least one switch bridge arm. The controller is coupled to the at least one switch bridge arm, and provides a pulse width modulation (PWM) signal group to control the at least one switch bridge arm. The magnetic bias balance circuit is coupled to two ends of the primary-side winding and the controller, and provides a compensation voltage to the controller according to an average voltage of a winding voltage across the two ends of the primary-side winding. The controller adjusts a duty cycle of the PWM signal group according to the compensation voltage to correct the magnetic bias.

Abstract: Embodiments of an apparatus for connection to a light adjustment sheet and conductive interfaces for connection to a light adjustment sheet are described. In one embodiment, an apparatus for connection to a light adjustment sheet include a power source interface configured to be connected to a power source and a sheet interface electrically connected to the power source interface. The sheet interface is configured to connect to the light adjustment sheet such that electricity can be conducted from the power source interface to the light adjustment sheet to switch the light adjustment sheet between different visibility states. Other embodiments are also described.

Abstract: There is provided a multi power supply apparatus for driving light emitting diodes that is synchronized with a frequency of one output power of multi output power to control a switching of the multi output power and simplifies power conversion in supplying power for driving light emitting diodes.

Abstract: The present disclosure is directed to a solution providing multi-state power management. In some aspects, the design of the multi-state power management system (MPMS) facilitates switching to battery back up power upon identifying a power outage and further controlling the intensity level of a load (e.g., a light source) such that the light run time meets a minimum required run time. The MPMS may be designed and configured to identify a power outage and a battery status based on the voltage at a voltage input of the lighting device. The design may also include controlling the intensity level of the light source responsive to temperature measurements, e.g., ambient temperature or the temperature of one or more components, to maintain the health of the system.

Abstract: A driver integrated circuit of a display apparatus generates a logic voltage in a power environment in which an analog voltage and a logic input/output voltage are irregularly inputted to the driver integrated circuit. The driver integrated circuit includes a first power generating unit that generates a first reference current and a first reference voltage based on the analog voltage, a second power generating unit that generates a second reference current and a second reference voltage based on the logic input/output voltage, and a logic voltage generating unit that generates a logic voltage in response to the first reference current and voltage or the second reference current and voltage according to an application order of the analog voltage and the logic input/output voltage.

Abstract: Apparatus and associated methods relate to an electrical interface design architecture to independently excite each of a network of light strings and/or light string controllers with any of a number of independent excitation signals. In an illustrative example, each of the light strings may receive a selected one of the excitation signals conducted via a wiring assembly to an interface formed as a plug or a corresponding socket. In some embodiments, the interface may galvanically connect one or more of the excitation signals to a corresponding load according to user-selection of a relative orientation between the plug and the socket. In some implementations the load may include a down-stream controller that draws operating power through a selected one of the conductors at the interface. In various implementations, the interface may supply a load such as a multi-channel cable or single channel light string, for example.

Abstract: The projector uses two lamps, which are high-pressure discharge lamps with the same rated power, as light sources. The projector includes: a first alternating-current generator configured to generate a lamp current to be supplied to one of the lamps, based on an input control signal; a second alternating-current generator configured to generate a lamp current to be supplied to the other lamp, based on an input control signal; and a controller configured to control the lamp currents to have a same period and to be out of phase, by inputting a control signal to each of the first and the second alternating-current generators.

Abstract: There is provided a multi power supply apparatus for driving light emitting diodes that is synchronized with a frequency of one output power of multi output power to control a switching of the multi output power and simplifies power conversion in supplying power for driving light emitting diodes.

Abstract: An apparatus and method for driving a lamp are provided. In one embodiment, an inverter having four switching elements is split into two inverter arms that are deployed at separate terminals of a floating lamp structure to achieve even light output. A controller drives both inverter arms such that power switching lines do not cross the floating lamp structure. In one embodiment, the controller adjusts the brightness of the lamp structure by adjusting the phase difference between outputs of a first inverter arm relative to a second inverter arm. In one embodiment, the controller adjusts the brightness by symmetrically pulse width modulating the outputs of the first inverter arm and the second inverter arm.

Abstract: An organic device package that provides full fault tolerance against both electrical shorts and electrical opens is presented. An organic device package comprising a plurality of groups of organic electronic elements electrically coupled in series, where at least one of the plurality of groups of organic electronic elements comprises a plurality of sub-groups of organic electronic elements electrically coupled in parallel, and where at least one of the plurality of sub-groups of organic electronic elements comprises a plurality of organic electronic elements electrically coupled in series. Further, various embodiments are contemplated where a plurality of series blocks and parallel blocks may be nested to provide a grid network having increased flexibility and fault tolerance.

Abstract: A surface plasmon resonance imaging system (40) and method is provided. The system (40) includes a light source (42) comprising a light-emitting diode (LED) array that is positioned at the focal point of a collimating lens (44). The light source (42) and collimating lens (44) are used to illuminate the substrate surface (50) at a range of angles dependent upon which one or more LEDs are lit. The substrate surface (50) receives light from the collimated lens (44) at a selected incident angle, which can be varied by selective illumination of one or more of the LEDs in the LED array. The system (40) further includes a detector (60) that is positioned such that it is capable of detecting an image reflected from the substrate surface (50).

Abstract: A power supply for applying a voltage to a scanning electromagnet for deflecting a charged particle beam has a first power supply unit having no filter and a second power supply unit having a filter. When an irradiation position of the charged particle beam in an irradiation object is moved, the first power supply unit, namely a power supply unit having no filter, is used to apply the voltage to the scanning electromagnet, so that an exciting current flowing in the scanning electromagnet can be changed in a short time. Further, when the irradiation position of the charged particle beam is maintained, the second power supply is used to apply a voltage whose pulsating component was removed to the scanning electromagnet, so that the exciting current flowing in the scanning electromagnet can be controlled precisely. Consequently, the charged particle beam can be applied uniformly to the irradiation object and an irradiation time of the charged particle beam to the irradiation object can be curtailed.

Abstract: An apparatus of a sustain driver in an AC-type plasma display panel having an energy recovery unit, comprising: a first drive unit for driving one electrode of a panel capacitor to a sustain voltage or a ground voltage; a second drive unit for driving another electrode of the panel capacitor to a sustain voltage or a ground voltage; and a common energy recovery unit. The common energy recovery unit includes: an inductor connected to the one electrode of the panel capacitor and form a L-C resonance circuit with the panel capacitor; a first and second external capacitors connected in series between the power source of the sustain voltage and the ground; and a switch unit for selectively switching the L-C resonance circuit and the first and second external capacitors during the charge and discharge operation of the panel capacitor.

Abstract: A modular lamp power supply is adapted to provide lamp power supply signals to a plurality of different lamps, each lamp having different power requirements. The power supply can be reconfigured to supply power to a new group of lamps simply by replacing the power circuit modules within the supply chassis.

Abstract: A light fixture assembly having both AC and DC lamps, as well as AC and DC power receptacles that is capable of operating from either an AC source or a DC source. A 110-volt AC lamp, as well as a 12-volt DC lamp are provided within a reflector housing. The reflector housing has a mask that fits onto the reflector housing. An insulating handle that contains a switch that controls AC power to the AC lamp provides insulation and improved gripping ability for a user. An electrical cord provides electrical current for both the AC and DC lamps. The electrical cord has a pair of adapters, that are compatible with first, a 110-volt AC outlet, for providing power to the AC lamp. Secondarly, the other adapter is compatible with a receptacle used for an automobile cigarette lighter, for providing power to the DC lamp.

Abstract: An emergency power supply including an input for connection to a power line, an output for connecting the input to electrical equipment so as to supply power thereto from the power line, a supplemental power supply connected to the output and adapted to supply power to the electrical equipment upon a power abnormality in the power line, an electrical energy storage means connected to the supplemental power supply and adapted to supply electrical energy thereto; and a circuit for detecting the abnormalities in the power line.

Abstract: A high intensity discharge (HID) lamp has an arc tube including a pair of main electrodes and at least one auxiliary electrode or probe, wherein a high frequency (HF) high voltage is applied to the probe for forming a high frequency (HF) ignition discharge for establishing a low frequency (LF) arc discharge between the main electrodes. In this ignition system, the electrodes of the arc tube are arranged so that an LF discharge path and an HF discharge path are positioned in an X- or a Y-configuration in the arc tube for causing easy lamp ignition. Also, to simplify the outer leads, it is desirable to mount the probe on one of the main electrodes by a dielectric member opposite another main electrode thereby to form a shorter gap between the probe and the other main electrodes than that between the main electrodes. The starting device of HID lamps has a high frequency-high voltage (HF-HV) generator, the output of which is applied, directly or indirectly, to the probe.

Abstract: A dual voltage lighting fixture for permiting the interchangeable use of light bulbs having substantially different operating voltages. The apparatus includes a housing to which is mounted a standard sized light bulb socket and a connector. A transformer is also mounted to the housing and serves to deliver electrical current to the socket and connector at substantially different operating voltages. A manually operated switch controls the supply of electrical current between the socket and the connector. A detachable fixture for receiving a smaller sized low voltage light bulb is also provided which is attached to the housing and connector. The detachable fixture may be removed whenever it is desirable to use a standard sized light bulb.

Abstract: An arrangement for the current limitation during the current supply of electrically excited gas lasers includes a rotary current transformer, self-inductances provided in front of a rotary current bridge rectifier, and a capacitor, if desired. In each phase conductor an inductance is provided between the secondary side of the rotary current transformer preferably working at power frequency and the rotary current bridge rectifier.